feat: switch to matrix.test.mystiq.app

Fix develop server breaking due to import syntax

.dockerignore

@@ -0,0 +1,2 @@
+node_modules
+target

.eslintrc.js

@@ -10,6 +10,16 @@ module.exports = {
     },
     "rules": {
         "no-console": "off",
-        "no-empty": "off"
+        "no-empty": "off",
+        "no-prototype-builtins": "off",
+        "no-unused-vars": "warn"
+    },
+    "globals": {
+        "DEFINE_VERSION": "readonly",
+        "DEFINE_GLOBAL_HASH": "readonly",
+        // only available in sw.js
+        "DEFINE_UNHASHED_PRECACHED_ASSETS": "readonly",
+        "DEFINE_HASHED_PRECACHED_ASSETS": "readonly",
+        "DEFINE_HASHED_CACHED_ON_REQUEST_ASSETS": "readonly"
     }
 };

.github/workflows/codechecks.js.yml

@@ -0,0 +1,47 @@
+# This workflow will do a clean install of node dependencies, build the source code and run tests across different versions of node
+# For more information see: https://help.github.com/actions/language-and-framework-guides/using-nodejs-with-github-actions
+
+# yarn cache setup from https://www.karltarvas.com/2020/12/09/github-actions-cache-yarn-install.html
+
+name: Code checks
+
+on:
+  push:
+    branches: [ master ]
+  pull_request:
+    branches: [ master ]
+
+jobs:
+  build:
+
+    runs-on: ubuntu-latest
+
+    strategy:
+      matrix:
+        node-version: [14.x]
+
+    steps:
+    - name: Checkout source
+      uses: actions/checkout@v2
+    - name: Install tools
+      uses: actions/setup-node@v2
+      with:
+        node-version: ${{ matrix.node-version }}
+# See: https://github.com/actions/cache/blob/main/examples.md#node---yarn
+    - name: Get Yarn cache directory
+      id: yarn-cache-dir-path
+      run: echo "::set-output name=dir::$(yarn cache dir)"
+    - name: Use Yarn cache
+      uses: actions/cache@v2
+      id: yarn-cache
+      with:
+        path: ${{ steps.yarn-cache-dir-path.outputs.dir }}
+        key: ${{ runner.os }}-yarn-${{ matrix.node-version }}-${{ hashFiles('**/yarn.lock') }}
+    - name: Install dependencies
+      run: yarn install --prefer-offline --frozen-lockfile
+    - name: Unit tests
+      run: yarn test
+    - name: Lint
+      run: yarn run lint-ci
+    - name: Typescript
+      run: yarn run tsc

.github/workflows/docker-publish.yml

@@ -0,0 +1,44 @@
+name: Container Image
+
+on:
+  push:
+    branches: [ master ]
+    tags: [ 'v*' ]
+  pull_request:
+    branches: [ master ]
+
+env:
+  IMAGE_NAME: ${{ github.repository }}
+  REGISTRY: ghcr.io
+
+jobs:
+  push:
+    runs-on: ubuntu-latest
+
+    permissions:
+      contents: read
+      packages: write
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v2
+
+      - name: Log into registry ${{ env.REGISTRY }}
+        uses: docker/login-action@v1
+        with:
+          registry: ${{ env.REGISTRY }}
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Extract Docker metadata
+        id: meta
+        uses: docker/metadata-action@v3
+        with:
+          images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
+
+      - name: Build and push Docker image
+        uses: docker/build-push-action@v2
+        with:
+          push: ${{ github.event_name != 'pull_request' }}
+          tags: ${{ steps.meta.outputs.tags }}
+          labels: ${{ steps.meta.outputs.labels }}

.gitignore

@@ -1,5 +1,6 @@
 *.sublime-project
 *.sublime-workspace
+.DS_Store
 node_modules
 fetchlogs
 sessionexports
@@ -7,3 +8,6 @@ bundle.js
 target
 lib
 *.tar.gz
+.eslintcache
+.tmp
+tmp/

.gitlab-ci.yml

@@ -0,0 +1,61 @@
+image: docker.io/alpine
+
+stages:
+  - test
+  - build
+
+.yarn-template:
+  image: docker.io/node
+  before_script:
+    - yarn install
+  cache:
+    paths:
+      - node_modules
+test:
+  extends: .yarn-template
+  stage: test
+  script:
+    - yarn test
+
+build:
+  extends: .yarn-template
+  stage: build
+  script:
+    - yarn build
+  artifacts:
+    paths:
+      - target
+
+.docker-template:
+  image: docker.io/docker
+  stage: build
+  services:
+    - docker:dind
+  before_script:
+    - docker login -u "$CI_REGISTRY_USER" -p "$CI_REGISTRY_PASSWORD" $CI_REGISTRY
+
+docker-release:
+  extends: .docker-template
+  rules:
+    - if: '$CI_COMMIT_TAG =~ /^v\d+\.\d+\.\d+$/'
+  script:
+    - docker build --pull -t "${CI_REGISTRY_IMAGE}:latest" -t "${CI_REGISTRY_IMAGE}:${CI_COMMIT_TAG}" .
+    - docker push "${CI_REGISTRY_IMAGE}:latest"
+    - docker push "${CI_REGISTRY_IMAGE}:${CI_COMMIT_TAG}"
+
+docker-tags:
+  extends: .docker-template
+  rules:
+    - if: '$CI_COMMIT_TAG && $CI_COMMIT_TAG !~ /^v\d+\.\d+\.\d+$/'
+  script:
+    - docker build --pull -t "${CI_REGISTRY_IMAGE}:${CI_COMMIT_TAG}" .
+    - docker push "${CI_REGISTRY_IMAGE}:${CI_COMMIT_TAG}"
+
+docker-branches:
+  extends: .docker-template
+  rules:
+    - if: $CI_COMMIT_BRANCH
+  script:
+    - docker build --pull -t "${CI_REGISTRY_IMAGE}:${CI_COMMIT_REF_SLUG}" .
+    - docker push "${CI_REGISTRY_IMAGE}:${CI_COMMIT_REF_SLUG}"
+

.ts-eslintrc.js

@@ -0,0 +1,25 @@
+module.exports = {
+    root: true,
+    env: {
+        "browser": true,
+        "es6": true
+    },
+    extends: [
+    //    "plugin:@typescript-eslint/recommended",
+    //    "plugin:@typescript-eslint/recommended-requiring-type-checking",
+    ],
+    parser: '@typescript-eslint/parser',
+    parserOptions: {
+        "ecmaVersion": 2020,
+        "sourceType": "module",
+        "project": "./tsconfig.json"
+    },
+    plugins: [
+        '@typescript-eslint',
+    ],
+    rules: {
+        "@typescript-eslint/no-floating-promises": 2,
+        "@typescript-eslint/no-misused-promises": 2,
+        "semi": ["error", "always"]
+    }
+};

.woodpecker.yml

@@ -0,0 +1,18 @@
+pipeline:
+    buildfrontend:
+        image: node:16
+        commands:
+            - yarn install --prefer-offline --frozen-lockfile
+            - yarn test
+            - yarn run lint-ci
+            - yarn run tsc
+            - yarn build
+
+    deploy:
+        image: python
+        when:
+            event: push
+            branch: master
+        commands:
+            - make ci-deploy
+        secrets: [ GITEA_WRITE_DEPLOY_KEY, LIBREPAGES_DEPLOY_SECRET ]

CONTRIBUTING.md

@@ -0,0 +1,150 @@
+Contributing code to hydrogen-web
+==================================
+
+Everyone is welcome to contribute code to hydrogen-web, provided that they are
+willing to license their contributions under the same license as the project
+itself. We follow a simple 'inbound=outbound' model for contributions: the act
+of submitting an 'inbound' contribution means that the contributor agrees to
+license the code under the same terms as the project's overall 'outbound'
+license - in this case, Apache Software License v2 (see
+[LICENSE](LICENSE)).
+
+How to contribute
+-----------------
+
+The preferred and easiest way to contribute changes to the project is to fork
+it on github, and then create a pull request to ask us to pull your changes
+into our repo (https://help.github.com/articles/using-pull-requests/)
+
+We use GitHub's pull request workflow to review the contribution, and either
+ask you to make any refinements needed or merge it and make them ourselves.
+
+Things that should go into your PR description:
+ * References to any bugs fixed by the change (in GitHub's `Fixes` notation)
+ * Describe the why and what is changing in the PR description so it's easy for
+   onlookers and reviewers to onboard and context switch.
+ * If your PR makes visual changes, include both **before** and **after** screenshots
+   to easily compare and discuss what's changing.
+ * Include a step-by-step testing strategy so that a reviewer can check out the
+   code locally and easily get to the point of testing your change.
+ * Add comments to the diff for the reviewer that might help them to understand
+   why the change is necessary or how they might better understand and review it.
+
+We use continuous integration, and all pull requests get automatically tested:
+if your change breaks the build, then the PR will show that there are failed
+checks, so please check back after a few minutes.
+
+Tests
+-----
+If your PR is a feature then we require that the PR also includes tests.
+These need to test that your feature works as expected and ideally test edge cases too.
+
+Tests are written as unit tests by exporting a `tests` function from the file to be tested.
+The function returns an object where the key is the test label, and the value is a 
+function that accepts an [assert](https://nodejs.org/api/assert.html) object, and return a Promise or nothing.
+
+Note that there is currently a limitation that files that are not indirectly included from `src/platform/web/main.js` won't be found by the runner.
+
+You can run the tests by running `yarn test`.
+This uses the [impunity](https://github.com/bwindels/impunity) runner.
+
+We don't require tests for bug fixes.
+
+In the future we may formalise this more.
+
+Code style
+----------
+The js-sdk aims to target TypeScript/ES6. All new files should be written in
+TypeScript and existing files should use ES6 principles where possible.
+
+Please disable any automatic formatting tools you may have active.
+If present, you'll be asked to undo any unrelated whitespace changes during code review.
+
+Members should not be exported as a default export in general.
+In general, avoid using `export default`.
+
+The remaining code-style for hydrogen is [in the process of being documented](codestyle.md), but
+contributors are encouraged to read the
+[code style document for matrix-react-sdk](https://github.com/matrix-org/matrix-react-sdk/blob/master/code_style.md)
+and follow the principles set out there.
+
+Please ensure your changes match the cosmetic style of the existing project,
+and ***never*** mix cosmetic and functional changes in the same commit, as it
+makes it horribly hard to review otherwise.
+
+Attribution
+-----------
+If you change or create a file, feel free to add yourself to the copyright holders
+in the license header of that file.
+
+Sign off
+--------
+In order to have a concrete record that your contribution is intentional
+and you agree to license it under the same terms as the project's license, we've
+adopted the same lightweight approach that the Linux Kernel
+(https://www.kernel.org/doc/Documentation/SubmittingPatches), Docker
+(https://github.com/docker/docker/blob/master/CONTRIBUTING.md), and many other
+projects use: the DCO (Developer Certificate of Origin:
+http://developercertificate.org/). This is a simple declaration that you wrote
+the contribution or otherwise have the right to contribute it to Matrix:
+
+```
+Developer Certificate of Origin
+Version 1.1
+
+Copyright (C) 2004, 2006 The Linux Foundation and its contributors.
+660 York Street, Suite 102,
+San Francisco, CA 94110 USA
+
+Everyone is permitted to copy and distribute verbatim copies of this
+license document, but changing it is not allowed.
+
+Developer's Certificate of Origin 1.1
+
+By making a contribution to this project, I certify that:
+
+(a) The contribution was created in whole or in part by me and I
+    have the right to submit it under the open source license
+    indicated in the file; or
+
+(b) The contribution is based upon previous work that, to the best
+    of my knowledge, is covered under an appropriate open source
+    license and I have the right under that license to submit that
+    work with modifications, whether created in whole or in part
+    by me, under the same open source license (unless I am
+    permitted to submit under a different license), as indicated
+    in the file; or
+
+(c) The contribution was provided directly to me by some other
+    person who certified (a), (b) or (c) and I have not modified
+    it.
+
+(d) I understand and agree that this project and the contribution
+    are public and that a record of the contribution (including all
+    personal information I submit with it, including my sign-off) is
+    maintained indefinitely and may be redistributed consistent with
+    this project or the open source license(s) involved.
+```
+
+If you agree to this for your contribution, then all that's needed is to
+include the line in your commit or pull request comment:
+
+```
+Signed-off-by: Your Name <your@email.example.org>
+```
+
+We accept contributions under a legally identifiable name, such as your name on
+government documentation or common-law names (names claimed by legitimate usage
+or repute). Unfortunately, we cannot accept anonymous contributions at this
+time.
+
+Git allows you to add this signoff automatically when using the `-s` flag to
+`git commit`, which uses the name and email set in your `user.name` and
+`user.email` git configs.
+
+If you forgot to sign off your commits before making your pull request and are
+on Git 2.17+ you can mass signoff using rebase:
+
+```
+git rebase --signoff origin/develop
+```

Dockerfile

@@ -1,7 +1,9 @@
-FROM node:alpine3.12
-RUN apk add --no-cache git
-COPY . /code
-WORKDIR /code
-RUN yarn install
-EXPOSE 3000
-ENTRYPOINT ["yarn", "start"]
+FROM docker.io/node:alpine as builder
+RUN apk add --no-cache git python3 build-base
+COPY . /app
+WORKDIR /app
+RUN yarn install \
+ && yarn build
+
+FROM docker.io/nginx:alpine
+COPY --from=builder /app/target /usr/share/nginx/html

Dockerfile-dev

@@ -0,0 +1,7 @@
+FROM docker.io/node:alpine
+RUN apk add --no-cache git python3 build-base
+COPY . /code
+WORKDIR /code
+RUN yarn install
+EXPOSE 3000
+ENTRYPOINT ["yarn", "start"]

Makefile

@@ -0,0 +1,14 @@
+ci-deploy: ## Deploy from CI/CD. Only call from within CI
+	@if [ "${CI}" != "woodpecker" ]; \
+	then echo "Only call from within CI. Will re-write your local Git configuration. To override, set export CI=woodpecker"; \
+		 exit 1; \
+	fi
+	git config --global user.email "${CI_COMMIT_AUTHOR_EMAIL}"
+	git config --global user.name "${CI_COMMIT_AUTHOR}"
+	./scripts/ci.sh --commit-files librepages target "${CI_COMMIT_AUTHOR} <${CI_COMMIT_AUTHOR_EMAIL}>"
+	./scripts/ci.sh --init "$$GITEA_WRITE_DEPLOY_KEY"
+	./scripts/ci.sh --deploy ${LIBREPAGES_DEPLOY_SECRET}  librepages
+	./scripts/ci.sh --clean
+
+help: ## Prints help for targets with comments
+	@cat $(MAKEFILE_LIST) | grep -E '^[a-zA-Z_-]+:.*?## .*$$' | awk 'BEGIN {FS = ":.*?## "}; {printf "\033[36m%-30s\033[0m %s\n", $$1, $$2}'

README.md

@@ -1,3 +1,5 @@
+[![status-badge](https://ci.batsense.net/api/badges/mystiq/hydrogen-web/status.svg)](https://ci.batsense.net/mystiq/hydrogen-web)
+
 # Hydrogen
 
 A minimal [Matrix](https://matrix.org/) chat client, focused on performance, offline functionality, and broad browser support. This is work in progress and not yet ready for primetime. Bug reports are welcome, but please don't file any feature requests or other missing things to be on par with Element Web.
@@ -10,11 +12,34 @@ Hydrogen's goals are:
  - It is a standalone webapp, but can also be easily embedded into an existing website/webapp to add chat capabilities.
  - Loading (unused) parts of the application after initial page load should be supported
 
+For embedded usage, see the [SDK instructions](doc/SDK.md).
+
 If you find this interesting, come and discuss on [`#hydrogen:matrix.org`](https://matrix.to/#/#hydrogen:matrix.org).
 
 # How to use
 
-Hydrogen is deployed to [hydrogen.element.io](https://hydrogen.element.io). You can run it locally `yarn install` (only the first time) and `yarn start` in the terminal, and point your browser to `http://localhost:3000`. If you prefer, you can also [use docker](doc/docker.md).
+Hydrogen is deployed to [hydrogen.element.io](https://hydrogen.element.io). You can also deploy Hydrogen on your own web server:
+
+ 1. Download the [latest release package](https://github.com/vector-im/hydrogen-web/releases).
+ 1. Extract the package to the public directory of your web server.
+ 1. If this is your first deploy:
+    1. copy `config.sample.json` to `config.json` and if needed, make any modifications (unless you've set up your own [sygnal](https://github.com/matrix-org/sygnal) instance, you don't need to change anything in the `push` section).
+    1. Disable caching entirely on the server for:
+        - `index.html`
+        - `sw.js`
+        - `config.json`
+        - All theme manifests referenced in the `themeManifests` of `config.json`, these files are typically called `theme-{name}.json`.
+
+        These resources will still be cached client-side by the service worker. Because of this; you'll still need to refresh the app twice before config.json changes are applied.
+
+## Set up a dev environment
+
+You can run Hydrogen locally by the following commands in the terminal:
+
+ - `yarn install` (only the first time)
+ - `yarn start` in the terminal
+
+Now point your browser to `http://localhost:3000`. If you prefer, you can also [use docker](doc/docker.md).
 
 # FAQ
 

codestyle.md

@@ -8,3 +8,5 @@
     otherwise it becomes hard to remember what was a default/named export
  - should we return promises from storage mutation calls? probably not, as we don't await them anywhere. only read calls should return promises?
     - we don't anymore
+ - don't use these features, as they are not widely enough supported.
+    - [lookbehind in regular expressions](https://caniuse.com/js-regexp-lookbehind)

doc/FAQ.md

@@ -1,5 +1,15 @@
 # FAQ
 
+## What browsers are supported?
+
+Internet Explorer 11, Chrome [1], Firefox [1] (not in a private window), Edge [1], Safari [1] and any mobile versions of these. It will probably also work on any derivatives of these.
+
+1: Because of https://github.com/vector-im/hydrogen-web/issues/230, only [more recent versions](https://caniuse.com/mdn-javascript_operators_optional_chaining) are supported.
+
+TorBrowser ships a crippled IndexedDB implementation and will not work. At some point we should support a memory store as a fallback, but that will still give a sub-par experience with end-to-end encryption.
+
+It used work in pre-webkit Edge, to have it work on Windows Phone, but that support has probably bit-rotted as it isn't tested anymore.
+
 ## Is there a way to run the app as a desktop app?
 
 You can install Hydrogen as a PWA using Chrome/Chromium on any platform or Edge on Windows. Gnome Web/Ephiphany also allows to "Install site as web application". There is no Electron build of Hydrogen, and there will likely be none in the near future, as Electron complicates the release process considerably. Once Hydrogen is more mature and feature complete, we might reconsider and use [Tauri](https://tauri.studio) if there are compelling use cases not possible with PWAs. For now though, we want to keep development and releasing fast and nimble ;)
@@ -12,18 +22,14 @@ If you can't find an easy way to locate the feature you are looking for, then th
 
 That's not yet a feature, as hydrogen just uses a single line text box for message input for now.
 
-### Hmm does Hydrogen not support leaving rooms? I left some rooms via Element and they moved to "Historical" but nothing happened on this end.
-
-Indeed :) [Joining](https://github.com/vector-im/hydrogen-web/issues/28) and [leaving](https://github.com/vector-im/hydrogen-web/issues/147) isn't implemented yet, just haven't gotten around to it.
-
 ## How can I verify my session from Element?
 
 You can only verify by comparing keys manually currently. In Element, go to your own profile in the right panel, click on the Hydrogen device and select Manually Verify by Text. The session key displayed should be the same as in the Hydrogen settings. You can't yet mark your Element session as trusted from Hydrogen.
 
 ## I want to host my own Hydrogen, how do I do that?
 
-There are no published builds at this point. You need to checkout the version you want to build, or master if you want to run bleeding edge, and run `yarn init` and then `yarn build` in a console (and install nodejs > 14 and yarn if you haven't yet). Now you should find all the files needed to host Hydrogen in the `target/` folder, just copy them all over to your server. As always, don't host your client on the same [origin](https://web.dev/same-origin-policy/#what's-considered-same-origin) as your homeserver.
+Published builds can be found at https://github.com/vector-im/hydrogen-web/releases. For building your own, you need to checkout the version you want to build, or master if you want to run bleeding edge, and run `yarn install` and then `yarn build` in a console (and install nodejs >= 15 and yarn if you haven't yet). Now you should find all the files needed to host Hydrogen in the `target/` folder, just copy them all over to your server. As always, don't host your client on the same [origin](https://web.dev/same-origin-policy/#what's-considered-same-origin) as your homeserver.
 
 ## I want to embed Hydrogen in my website, how should I do that?
 
-There are no npm modules yet published for Hydrogen. The easiest is probably to setup your website project, do yarn/npm init if you haven't yet, then add the hydrogen repo as a git http dependency, and import the files/classes you want to use from Hydrogen. Feel free to ask which classes you need as the documentation is lacking somewhat still. Note that at this early, pre 1.0 stage of the project, there is no promise of API stability yet.
+Hydrogen aims to be usable as an SDK, and while it is still early days, you can find some documentation how to do that in [SDK.md](SDK.md).

doc/IMPORT-ISSUES.md

@@ -0,0 +1,11 @@
+## How to import common-js dependency using ES6 syntax
+---
+Until [#6632](https://github.com/vitejs/vite/issues/6632) is fixed, such imports should be done as follows:
+
+```ts
+import * as pkg from "off-color";
+// @ts-ignore 
+const offColor = pkg.offColor ?? pkg.default.offColor;
+```
+
+This way build, dev server and unit tests should all work.

doc/SDK.md

@@ -0,0 +1,116 @@
+# Hydrogen View SDK
+
+
+The Hydrogen view SDK allows developers to integrate parts of the Hydrogen application into the UI of their own application. Hydrogen is written with the MVVM pattern, so to construct a view, you'd first construct a view model, which you then pass into the view. For most view models, you will first need a running client.
+
+## Example
+
+The Hydrogen SDK requires some assets to be shipped along with your app for things like downloading attachments, and end-to-end encryption. A convenient way to make this happen is provided by the SDK (importing `hydrogen-view-sdk/paths/vite`) but depends on your build system. Currently, only [vite](https://vitejs.dev/) is supported, so that's what we'll be using in the example below.
+
+You can create a vite project using the following commands:
+
+```sh
+# you can pick "vanilla-ts" here for project type if you're not using react or vue
+yarn create vite
+cd <your-project-name>
+yarn
+yarn add hydrogen-view-sdk
+```
+
+You should see a `index.html` in the project root directory, containing an element with `id="app"`. Add the attribute `class="hydrogen"` to this element, as the CSS we'll include from the SDK assumes for now that the app is rendered in an element with this classname.
+
+If you go into the `src` directory, you should see a `main.ts` file. If you put this code in there, you should see a basic timeline after login and initial sync have finished (might take a while before you see anything on the screen actually).
+
+You'll need to provide the username and password of a user that is already in the [#element-dev:matrix.org](https://matrix.to/#/#element-dev:matrix.org) room (or change the room id).
+
+```ts
+import {
+    Platform,
+    Client,
+    LoadStatus,
+    createNavigation,
+    createRouter,
+    RoomViewModel,
+    TimelineView,
+    viewClassForTile
+} from "hydrogen-view-sdk";
+import downloadSandboxPath from 'hydrogen-view-sdk/download-sandbox.html?url';
+import workerPath from 'hydrogen-view-sdk/main.js?url';
+import olmWasmPath from '@matrix-org/olm/olm.wasm?url';
+import olmJsPath from '@matrix-org/olm/olm.js?url';
+import olmLegacyJsPath from '@matrix-org/olm/olm_legacy.js?url';
+const assetPaths = {
+    downloadSandbox: downloadSandboxPath,
+    worker: workerPath,
+    olm: {
+        wasm: olmWasmPath,
+        legacyBundle: olmLegacyJsPath,
+        wasmBundle: olmJsPath
+    }
+};
+import "hydrogen-view-sdk/assets/theme-element-light.css";
+// OR import "hydrogen-view-sdk/assets/theme-element-dark.css";
+
+async function main() {
+    const app = document.querySelector<HTMLDivElement>('#app')!
+    const config = {};
+    const platform = new Platform({container: app, assetPaths, config, options: { development: import.meta.env.DEV }});
+    const navigation = createNavigation();
+    platform.setNavigation(navigation);
+    const urlRouter = createRouter({
+        navigation: navigation,
+        history: platform.history
+    });
+    urlRouter.attach();
+    const client = new Client(platform);
+
+    const loginOptions = await client.queryLogin("matrix.org").result;
+    client.startWithLogin(loginOptions.password("username", "password"));
+
+    await client.loadStatus.waitFor((status: string) => {
+        return status === LoadStatus.Ready ||
+            status === LoadStatus.Error ||
+            status === LoadStatus.LoginFailed;
+    }).promise;
+
+    if (client.loginFailure) {
+        alert("login failed: " + client.loginFailure);
+    } else if (client.loadError) {
+        alert("load failed: " + client.loadError.message);
+    } else {
+        const {session} = client;
+        // looks for room corresponding to #element-dev:matrix.org, assuming it is already joined
+        const room = session.rooms.get("!bEWtlqtDwCLFIAKAcv:matrix.org");
+        const vm = new RoomViewModel({
+            room,
+            ownUserId: session.userId,
+            platform,
+            urlCreator: urlRouter,
+            navigation,
+        });
+        await vm.load();
+        const view = new TimelineView(vm.timelineViewModel, viewClassForTile);
+        app.appendChild(view.mount());
+    }
+}
+
+main();
+```
+
+## Typescript support
+
+Typescript support is not yet available while we're converting the Hydrogen codebase to Typescript.
+In your `src` directory, you'll need to add a `.d.ts` (can be called anything, e.g. `deps.d.ts`)
+containing this snippet to make Typescript not complain that `hydrogen-view-sdk` doesn't have types:
+
+```ts
+declare module "hydrogen-view-sdk";
+```
+
+## API Stability
+
+This library follows semantic versioning; there is no API stability promised as long as the major version is still 0. Once 1.0.0 is released, breaking changes will be released with a change in major versioning.
+
+## Third-party licenses
+
+This package bundles the bs58 package ([license](https://github.com/cryptocoinjs/bs58/blob/master/LICENSE)), and the Inter font ([license](https://github.com/rsms/inter/blob/master/LICENSE.txt)).

doc/THEMING.md

@@ -0,0 +1,204 @@
+# Theming Documentation
+## Basic Architecture
+A **theme collection** in Hydrogen is represented by a `manifest.json` file and a `theme.css` file.
+The manifest specifies variants (eg: dark,light ...) each of which is a **theme** and maps to a single css file in the build output.
+
+Each such theme is produced by changing the values of variables in the base `theme.css` file with those specified in the variant section of the manifest:
+
+![](images/theming-architecture.png)
+
+More in depth explanations can be found in later sections.
+
+## Structure of `manifest.json`
+[See theme.ts](../src/platform/types/theme.ts)
+
+## Variables
+CSS variables specific to a particular variant are specified in the `variants` section of the manifest:
+```json=
+ "variants": {
+     "light": {
+         ...
+         "variables": {
+             "background-color-primary": "#fff",
+             "text-color": "#2E2F32",
+         }
+     },
+      "dark": {
+         ...
+        "variables": {
+            "background-color-primary": "#21262b",
+            "text-color": "#fff",
+        }
+    }
+ }
+```
+
+These variables will appear in the css file (theme.css):
+```css=
+body {
+    background-color: var(--background-color-primary);
+    color: var(--text-color);
+}
+```
+
+During the build process, this would result in the creation of two css files (one for each variant) where the variables are substitued with the corresponding values specified in the manifest:
+
+*element-light.css*:
+```css=
+body {
+    background-color: #fff;
+    color: #2E2F32;
+}
+```
+
+*element-dark.css*:
+```css=
+body {
+    background-color: #21262b;
+    color: #fff;
+}
+```
+
+## Derived Variables
+In addition to simple substitution of variables in the stylesheet, it is also possible to instruct the build system to first produce a new value from the base variable value before the substitution.
+
+Such derived variables have the form `base_css_variable--operation-arg` and can be read as:
+apply `operation` to `base_css_variable` with argument `arg`.
+
+Continuing with the previous example, it possible to specify:
+```css=
+.left-panel {
+    /* background color should be 20% more darker
+       than background-color-primary */
+    background-color: var(--background-color-primary--darker-20);
+}
+```
+
+Currently supported operations are:
+
+| Operation | Argument | Operates On |
+| -------- | -------- | -------- |
+| darker     | percentage | color |
+| lighter     | percentage | color |
+
+## Aliases
+It is possible give aliases to variables in the `theme.css` file:
+```css=
+:root {
+    font-size: 10px;
+    /* Theme aliases */
+    --icon-color: var(--background-color-secondary--darker-40);
+}
+```
+It is possible to further derive from these aliased variables:
+```css=
+div {
+    background: var(--icon-color--darker-20);
+    --my-alias: var(--icon-color--darker-20);
+    /* Derive from aliased  variable */
+    color: var(--my-alias--lighter-15);
+}
+```
+
+
+## Colorizing svgs
+Along with a change in color-scheme, it may be necessary to change the colors in the svg icons and images. 
+This can be done by supplying the preferred colors with query parameters:
+`my-awesome-logo.svg?primary=base-variable-1&secondary=base-variable-2`  
+
+This instructs the build system to colorize the svg with the given primary and secondary colors.
+`base-variable-1` and `base-variable-2` are the css-variables specified in the `variables` section of the manifest.
+
+For colorizing svgs, the source svg must use `#ff00ff` as the primary color and `#00ffff` as the secondary color:
+
+  
+
+| ![](images/svg-icon-example.png) | ![](images/coloring-process.png) |
+| :--: |:--: |
+| **original source image** | **transformation process** |
+
+## Creating your own theme variant in Hydrogen
+If you're looking to change the color-scheme of the existing Element theme, you only need to add your own variant to the existing `manifest.json`.
+
+The steps are fairly simple:
+1. Copy over an existing variant to the variants section of the manifest.
+2. Change `dark`, `default` and `name` fields.
+3. Give new values to each variable in the `variables` section.
+4. Build hydrogen.
+
+## Creating your own theme collection in Hydrogen
+If a theme variant does not solve your needs, you can create a new theme collection with a different base `theme.css` file.
+1. Create a directory for your new theme-collection under `src/platform/web/ui/css/themes/`.
+2. Create `manifest.json` and `theme.css` files within the newly created directory.
+3. Populate `manifest.json` with the base css variables you wish to use.
+4. Write styles in your `theme.css` file using the base variables, derived variables and colorized svg icons.
+5. Tell the build system where to find this theme-collection by providing the location of this directory to the `themeBuilder` plugin in `vite.config.js`:
+```json=
+...
+themeBuilder({
+    themeConfig: {
+        themes: {
+            element: "./src/platform/web/ui/css/themes/element",
+            awesome: "path/to/theme-directory"
+        },
+        default: "element",
+    },
+    compiledVariables,
+}),
+...
+```
+6. Build Hydrogen.
+
+## Changing the default theme
+To change the default theme used in Hydrogen, modify the `defaultTheme` field in `config.json` file (which can be found in the build output):
+```json=
+"defaultTheme": {
+    "light": theme-id,
+    "dark": theme-id
+}
+```
+
+Here *theme-id* is of the form `theme-variant` where `theme` is the key used when specifying the manifest location of the theme collection in `vite.config.js` and `variant` is the key used in variants section of the manifest.
+
+Some examples of theme-ids are `element-dark` and `element-light`.  
+
+To find the theme-id of some theme, you can look at the built-asset section of the manifest in the build output.
+
+This default theme will render as "Default" option in the theme-chooser dropdown. If the device preference is for dark theme, the dark default is selected and vice versa.
+
+**You'll need to reload twice so that Hydrogen picks up the config changes!**
+
+# Derived Theme(Collection)
+This allows users to theme Hydrogen without the need for rebuilding. Derived theme collections can be thought of as extensions (derivations) of some existing build time theme. 
+
+## Creating a derived theme:
+Here's how you create a new derived theme:
+1. You create a new theme manifest file (eg: theme-awesome.json) and mention which build time theme you're basing your new theme on using the `extends` field. The base css file of the mentioned theme is used for your new theme.
+2. You configure the theme manifest as usual by populating the `variants` field with your desired colors.
+3. You add your new theme manifest to the list of themes in `config.json`.
+
+Refresh Hydrogen twice (once to refresh cache, and once to load) and the new theme should show up in the theme chooser.
+
+## How does it work?
+
+For every theme collection in hydrogen, the build process emits a runtime css file which like the built theme css file contains variables in the css code. But unlike the theme css file, the runtime css file lacks the definition for these variables:
+
+CSS for the built theme:
+```css
+:root {
+    --background-color-primary: #f2f20f;
+}
+
+body {
+    background-color: var(--background-color-primary);
+}
+```
+and the corresponding runtime theme:
+```css
+/* Notice the lack of definiton for --background-color-primary here! */
+body {
+    background-color: var(--background-color-primary);
+}
+```
+
+When hydrogen loads a derived theme, it takes the runtime css file of the extended theme and dynamically adds the variable definition based on the values specified in the manifest. Icons are also colored dynamically and injected as variables using Data URIs.

doc/TS-MIGRATION.md

@@ -0,0 +1,38 @@
+# Typescript style guide
+
+## Use `type` rather than `interface` for named parameters and POJO return values.
+
+`type` and `interface` can be used somewhat interchangeably, but let's use `type` to describe data and `interface` to describe (polymorphic) behaviour.
+
+Good examples of data are option objects to have named parameters, and POJO (plain old javascript objects) without any methods, just fields.
+
+Also see [this playground](https://www.typescriptlang.org/play?#code/C4TwDgpgBACghgJwgO2AeTMAlge2QZygF4oBvAKCiqmTgFsIAuKfYBLZAcwG5LqATCABs4IAPzNkAVzoAjCAl4BfcuVCQoAYQAWWIfwzY8hEvCSpDuAlABkZPlQDGOITgTNW7LstWOR+QjMUYHtqKGcCNilHYDcAChxMK3xmIIsk4wBKewcoFRVyPzgArV19KAgAD2AUfkDEYNDqCM9o2IQEjIJmHT0DLvxsijCw-ClIDsSjAkzeEebjEIYAuE5oEgADABJSKeSAOloGJSgsQh29433nVwQlDbnqfKA)
+
+## Use `type foo = { [key: string]: any }` for types that you intend to fill in later.
+
+For instance, if you have a method such as:
+```js
+    function load(options) {
+        // ...
+    }
+```
+and you intend to type options at some later point, do:
+```ts
+    type Options = { [key: string]: any}
+```
+This makes it much easier to add the necessary type information at a later time.
+
+## Use `object` or `Record<string, any>` to describe a type that accepts any javascript object.
+
+Sometimes a function or method may genuinely need to accept any object; eg:
+```js
+function encodeBody(body) {
+    // ...
+}
+```
+In this scenario:
+- Use `object` if you know that you will not access any property
+- Use `Record<string, any>` if you need to access some property
+
+Both usages prevent the type from accepting primitives (eg: string, boolean...).  
+If using `Record`, ensure that you have guards to check that the properties really do exist.

doc/UI/index.md

@@ -0,0 +1,3 @@
+# Index for UI code
+
+1. [Rendering DOM elements](./render-dom-elements.md)

doc/UI/render-dom-elements.md

@@ -0,0 +1,47 @@
+tldr; Use `tag` from `ui/general/html.js` to quickly create DOM elements.
+
+## Syntax
+---
+The general syntax is as follows:
+```js
+tag.tag_name({attribute1: value, attribute2: value, ...}, [child_elements]);
+```
+**tag_name** can be any one of the following:
+```
+    br, a, ol, ul, li, div, h1, h2, h3, h4, h5, h6,
+    p, strong, em, span, img, section, main, article, aside,
+    pre, button, time, input, textarea, label, form, progress, output, video
+```
+
+<br />
+
+eg:
+Here is an example HTML segment followed with the code to create it in Hydrogen.
+```html
+<section class="main-section">
+    <h1>Demo</h1>
+    <button class="btn_cool">Click me</button>
+</section>
+```
+```js
+tag.section({className: "main-section"},[
+    tag.h1("Demo"), 
+    tag.button({className:"btn_cool"}, "Click me")
+    ]);
+```
+<br />
+
+**Note:** In views based on `TemplateView`, you will see `t` used instead of `tag`.  
+`t` is is `TemplateBuilder` object passed to the render function in `TemplateView`.
+Although syntactically similar, they are not functionally equivalent.  
+Primarily `t` **supports** bindings and event handlers while `tag` **does not**.
+
+```js
+    // The onClick here wont work!!
+    tag.button({className:"awesome-btn", onClick: () => this.foo()});
+
+    render(t, vm){
+        // The onClick works here.
+        t.button({className:"awesome-btn", onClick: () => this.foo()});
+    }
+```

doc/UI/ui.md

@@ -0,0 +1,206 @@
+## IView components
+
+The [interface](https://github.com/vector-im/hydrogen-web/blob/master/src/platform/web/ui/general/types.ts) adopted by view components is agnostic of how they are rendered to the DOM. This has several benefits:
+ - it allows Hydrogen to not ship a [heavy view framework](https://bundlephobia.com/package/react-dom@18.2.0) that may or may not be used by its SDK users, and also keep bundle size of the app down.
+ - Given the interface is quite simple, is should be easy to integrate this interface into the render lifecycle of other frameworks.
+ - The main implementations used in Hydrogen are [`ListView`](https://github.com/vector-im/hydrogen-web/blob/master/src/platform/web/ui/general/ListView.ts) (rendering [`ObservableList`](https://github.com/vector-im/hydrogen-web/blob/master/src/observable/list/BaseObservableList.ts)s) and [`TemplateView`](https://github.com/vector-im/hydrogen-web/blob/master/src/platform/web/ui/general/TemplateView.ts) (templating and one-way databinding), each only a few 100 lines of code and tailored towards their specific use-case. They work straight with the DOM API and have no other dependencies.
+ - a common inteface allows us to mix and match between these different implementations (and gradually shift if need be in the future) with the code.
+
+## Templates
+
+### Template language
+
+Templates use a mini-DSL language in pure javascript to express declarative templates. This is basically a very thin wrapper around `document.createElement`, `document.createTextNode`, `node.setAttribute` and `node.appendChild` to quickly create DOM trees. The general syntax is as follows:
+```js
+t.tag_name({attribute1: value, attribute2: value, ...}, [child_elements]);
+t.tag_name(child_element);
+t.tag_name([child_elements]);
+```
+**tag_name** can be [most HTML or SVG tags](https://github.com/vector-im/hydrogen-web/blob/master/src/platform/web/ui/general/html.ts#L102-L110).
+
+eg:
+Here is an example HTML segment followed with the code to create it in Hydrogen.
+```html
+<section class="main-section">
+    <h1>Demo</h1>
+    <button class="btn_cool">Click me</button>
+</section>
+```
+```js
+t.section({className: "main-section"},[
+    t.h1("Demo"), 
+    t.button({className:"btn_cool"}, "Click me")
+]);
+```
+
+All these functions return DOM element nodes, e.g. the result of `document.createElement`.
+
+### TemplateView
+
+`TemplateView` builds on top of templating by adopting the IView component model and adding event handling attributes, sub views and one-way databinding.
+In views based on `TemplateView`, you will see a render method with a `t` argument.  
+`t` is `TemplateBuilder` object passed to the render function in `TemplateView`. It also takes a data object to render and bind to, often called `vm`, short for view model from the MVVM pattern Hydrogen uses.
+
+You either subclass `TemplateView` and override the `render` method:
+```js
+class MyView extends TemplateView {
+    render(t, vm) {
+        return t.div(...);
+    }
+}
+```
+
+Or you pass a render function to `InlineTemplateView`:
+```js
+new InlineTemplateView(vm, (t, vm) => {
+    return t.div(...);
+});
+```
+
+**Note:** the render function is only called once to build the initial DOM tree and setup bindings, etc ... Any subsequent updates to the DOM of a component happens through bindings.
+
+#### Event handlers
+
+Any attribute starting with `on` and having a function as a value will be attached as an event listener on the given node. The event handler will be removed during unmounting.
+
+```js
+t.button({onClick: evt => {
+    vm.doSomething(evt.target.value);
+}}, "Click me");
+```
+
+#### Subviews
+
+`t.view(instance)` will mount the sub view (can be any IView) and return its root node so it can be attached in the DOM tree.
+All subviews will be unmounted when the parent view gets unmounted.
+
+```js
+t.div({className: "Container"}, t.view(new ChildView(vm.childViewModel)));
+```
+
+#### One-way data-binding
+
+A binding couples a part of the DOM to a value on the view model. The view model emits an update when any of its properties change, to which the view can subscribe. When an update is received by the view, it will reevaluate all the bindings, and update the DOM accordingly.
+
+A binding can appear in many places where a static value can usually be used in the template tree.
+To create a binding, you pass a function that maps the view value to a static value.
+
+##### Text binding
+
+```js
+t.p(["I've got ", vm => vm.counter, " beans"])
+```
+
+##### Attribute binding
+
+```js
+t.button({disabled: vm => vm.isBusy}, "Submit");
+```
+
+##### Class-name binding
+```js
+t.div({className: {
+    button: true,
+    active: vm => vm.isActive
+}})
+```
+##### Subview binding
+
+So far, all the bindings can only change node values within our tree, but don't change the structure of the DOM. A sub view binding allows you to conditionally add a subview based on the result of a binding function.
+
+All sub view bindings return a DOM (element or comment) node and can be directly added to the DOM tree by including them in your template.
+
+###### map
+
+`t.mapView` allows you to choose a view based on the result of the binding function:
+
+```js
+t.mapView(vm => vm.count, count => {
+    return count > 5 ? new LargeView(count) : new SmallView(count);
+});
+```
+
+Every time the first or binding function returns a different value, the second function is run to create a new view to replace the previous view.
+
+You can also return `null` or `undefined` from the second function to indicate a view should not be rendered. In this case a comment node will be used as a placeholder.
+
+There is also a `t.map` which will create a new template view (with the same value) and you directly provide a render function for it:
+
+```js
+t.map(vm => vm.shape, (shape, t, vm) => {
+    switch (shape) {
+        case "rect": return t.rect();
+        case "circle": return t.circle();
+    }
+})
+```
+
+###### if
+
+`t.ifView` will render the subview if the binding returns a truthy value:
+
+```js
+t.ifView(vm => vm.isActive, vm => new View(vm.someValue));
+```
+
+You equally have `t.if`, which creates a `TemplateView` and passes you the `TemplateBuilder`:
+
+```js
+t.if(vm => vm.isActive, (t, vm) => t.div("active!"));
+```
+
+##### Side-effects
+
+Sometimes you want to imperatively modify your DOM tree based on the value of a binding.
+`mapSideEffect` makes this easy to do:
+
+```js
+let node = t.div();
+t.mapSideEffect(vm => vm.color, (color, oldColor) => node.style.background = color);
+return node;
+```
+
+**Note:** you shouldn't add any bindings, subviews or event handlers from the side-effect callback,
+the safest is to not use the `t` argument at all.
+If you do, they will be added every time the callback is run and only cleaned up when the view is unmounted.
+
+#### `tag` vs `t`
+
+If you don't need a view component with data-binding, sub views and event handler attributes, the template language also is available in `ui/general/html.js` without any of these bells and whistles, exported as `tag`. As opposed to static templates with `tag`, you always use
+`TemplateView` as an instance of a class, as there is some extra state to keep track (bindings, event handlers and subviews).
+
+Although syntactically similar, `TemplateBuilder` and `tag` are not functionally equivalent.  
+Primarily `t` **supports** bindings and event handlers while `tag` **does not**. This is because to remove event listeners, we need to keep track of them, and thus we need to keep this state somewhere which
+we can't do with a simple function call but we can insite the TemplateView class.
+
+```js
+    // The onClick here wont work!!
+    tag.button({className:"awesome-btn", onClick: () => this.foo()});
+
+class MyView extends TemplateView {
+    render(t, vm){
+        // The onClick works here.
+        t.button({className:"awesome-btn", onClick: () => this.foo()});
+    }
+}
+```
+
+## ListView
+
+A view component that renders and updates a list of sub views for every item in a `ObservableList`.
+
+```js
+const list = new ListView({
+    list: someObservableList
+}, listValue => return new ChildView(listValue))
+```
+
+As items are added, removed, moved (change position) and updated, the DOM will be kept in sync.
+
+There is also a `LazyListView` that only renders items in and around the current viewport, with the restriction that all items in the list must be rendered with the same height.
+
+### Sub view updates
+
+Unless the `parentProvidesUpdates` option in the constructor is set to `false`, the ListView will call the `update` method on the child `IView` component when it receives an update event for one of the items in the `ObservableList`.
+
+This way, not every sub view has to have an individual listener on it's view model (a value from the observable list), and all updates go from the observable list to the list view, who then notifies the correct sub view.

doc/docker.md

@@ -1,22 +1,58 @@
+## Warning
+
 Usage of docker is a third-party contribution and not actively tested, used or supported by the main developer(s).
 
-Having said that, you can also use Docker to create a local dev environment.
+Having said that, you can also use Docker to create a local dev environment or a production deployment.
+
+## Dev environment
 
 In this repository, create a Docker image:
 
-    docker build -t hydrogen .
+```
+docker build -t hydrogen-dev -f Dockerfile-dev .
+```
 
 Then start up a container from that image:
 
-    docker run \
-        --name hydrogen-dev \
-        --publish 3000:3000 \
-        --volume "$PWD":/code \
-        --interactive \
-        --tty \
-        --rm \
-        hydrogen
+```
+docker run \
+    --name hydrogen-dev \
+    --publish 3000:3000 \
+    --volume "$PWD":/code \
+    --interactive \
+    --tty \
+    --rm \
+    hydrogen-dev
+```
 
 Then point your browser to `http://localhost:3000`. You can see the server logs in the terminal where you started the container.
 
 To stop the container, simply hit `ctrl+c`.
+
+## Production deployment
+
+### Build or pull image
+
+In this repository, create a Docker image:
+
+```
+docker build -t hydrogen .
+```
+
+Or, pull the docker image from GitLab:
+
+```
+docker pull registry.gitlab.com/jcgruenhage/hydrogen-web
+docker tag registry.gitlab.com/jcgruenhage/hydrogen-web hydrogen
+```
+
+### Start container image
+
+Then, start up a container from that image:
+
+```
+docker run \
+    --name hydrogen \
+    --publish 80:80 \
+    hydrogen
+```

doc/impl-thoughts/E2EE.md

@@ -34,8 +34,8 @@
             - verify signature on key
             - ??? what about inbound/outbound sessions? do they require multiple OlmSession objects?
                 - doesn't look like it, more like a way to start the session but once started (type=1), they are equivalent?
-                    - for outbound, see  file:///home/bwindels/Downloads/matrix-docs/End-to-End%20Encryption%20implementation%20guide%20%7C%20Matrix.org.html#starting-an-olm-session
-                    - for inbound, see: file:///home/bwindels/Downloads/matrix-docs/End-to-End%20Encryption%20implementation%20guide%20|%20Matrix.org.html#handling-an-mroomencrypted-event
+                    - for outbound, see  https://matrix.org/docs/guides/end-to-end-encryption-implementation-guide#starting-an-olm-session
+                    - for inbound, see: https://matrix.org/docs/guides/end-to-end-encryption-implementation-guide#handling-an-mroomencrypted-event
                 - so in this case, it would the session would be created as an outbound session.
             - store pickled, index by curve25519 identity key?
         - get from storage if exists and unpickle
@@ -68,10 +68,10 @@
     - mark them as published in account
     - update picked session in storage
  - implement encrypting olm messages
-    - roughly file:///home/bwindels/Downloads/matrix-docs/End-to-End%20Encryption%20implementation%20guide%20|%20Matrix.org.html#encrypting-an-event-with-olm
+    - roughly https://matrix.org/docs/guides/end-to-end-encryption-implementation-guide#encrypting-an-event-with-olm
     - packaging as m.room.encrypted event
  - implement decrypting olm messages
-    - roughly file:///home/bwindels/Downloads/matrix-docs/End-to-End%20Encryption%20implementation%20guide%20|%20Matrix.org.html#handling-an-mroomencrypted-event
+    - roughly https://matrix.org/docs/guides/end-to-end-encryption-implementation-guide#handling-an-mroomencrypted-event
     - decrypt with libolm
     - verify signature
     - check message index, etc to detect replay attacks

doc/impl-thoughts/PENDING_REPLIES.md

@@ -0,0 +1,25 @@
+# Replying to pending messages
+The matrix spec requires clients capable of rich replies (that would be us once replies work) to include fallback (textual in `body` and structured in `formatted_body`) that can be rendered
+by clients that do not natively support rich replies (that would be us at the time of writing). The schema for the fallback is as follows:
+
+```
+<mx-reply>
+  <blockquote>
+    <a href="https://matrix.to/#/!somewhere:example.org/$event:example.org">In reply to</a>
+    <a href="https://matrix.to/#/@alice:example.org">@alice:example.org</a>
+    <br />
+    <!-- This is where the related event's HTML would be. -->
+  </blockquote>
+</mx-reply>
+```
+
+There's a single complication here for pending events: we have `$event:example.org` in the schema (the `In reply to` link), and it must
+be present _within the content_, inside `formatted_body`. The issue is that, if we are queuing a reply to a pending event,
+we don't know its remote ID. All we know is its transaction ID on our end. If we were to use that while formatting the message,
+we'd be sending messages that contain our internal transaction IDs instead of proper matrix event identifiers.
+
+To solve this, we'd need `SendQueue`, whenever it receives a remote echo, to update pending events that are replies with their
+`relatedEventId`. This already happens, and the `event_id` field in `m.relates_to` is updated. But we'd need to extend this
+to adjust the messages' `formatted_body` with the resolved remote ID, too.
+
+How do we safely do this, without accidentally substituting event IDs into places in the body where they were not intended?

doc/impl-thoughts/RELATIONS.md

@@ -3,6 +3,19 @@ Relations and redactions
 events that refer to another event will need support in the SyncWriter, Timeline and SendQueue I think.
 SyncWriter will need to resolve the related remote id to a [fragmentId, eventIndex] and persist that on the event that relates to some other. Same for SendQueue? If unknown remote id, not much to do. However, once the remote id comes in, how do we handle it correctly? We might need a index on m.relates_to/event_id? I'd rather avoid that if possible, as that becomes useless once we have the target event of the relationship (we store the relations on the target event (see "One fetch" below) and have the target event id on the relation so can go both ways). I'm not sure this index will be completely useless actually. For edits, we'll want to be able to list all edits. For reactions, we'll want to fetch the authors and timestamps. For replies, we want to render the origin event and not use the fallback text? It is true though that only a minority of the events will have a related_to event id, so I wonder if it is faster to put it in a different store? Perhaps a prototype can clarify ...
 
+`event_relations` store could be this:
+
+{
+	sourceEventId:
+	targetEventId:
+	rel_type:
+	roomId: 
+}
+
+`{"key": "!bEWtlqtDwCLFIAKAcv:matrix.org|$apmyieZOI5vm4DzjEFzjbRiZW9oeQQR21adM6A6eRwM|m.annotation|m.reaction|$jSisozR3is5XUuDZXD5cyaVMOQ5_BtFS3jKfcP89MOM"}`
+
+or actually stored like `roomId|targetEventId|rel_type|sourceEventId`. How can we get the last edit? They are sorted by origin_server_ts IIRC? Should this be part of the key? Solved: we store the event id of a replacement on the target event
+
 We should look into what part of the relationships will be present on the event once it is received from the server (e.g. m.replace might be evident, but not all the reaction events?). If not, we could add a object store with missing relation targets.
 
 The timeline can take incoming events from both the SendQueue and SyncWriter, and see if their related to fragmentId/eventIndex is in view, and then update it?
@@ -22,3 +35,235 @@ wrt to how to store relations in indexeddb, we could store all local ids of rela
 Replies should definitely use this relation mechanism, so we can easily show the most up to date version of the replied-to event.
 
 Redactions can de done separately
+
+For replies (or references in general?), we do need to load the referred-to event in a second read. For reactions and edits, they will already be stored on the target event.
+
+
+## Example events from the wild
+
+### Reaction
+
+```json
+{
+  "content": {
+    "m.relates_to": {
+      "event_id": "$apmyieZOI5vm4DzjEFzjbRiZW9oeQQR21adM6A6eRwM",
+      "key": "👍️",
+      "rel_type": "m.annotation"
+    }
+  },
+  "origin_server_ts": 1621284357314,
+  "sender": "@charly:matrix.org",
+  "type": "m.reaction",
+  "unsigned": {
+    "age": 64140856
+  },
+  "event_id": "$jSisozR3is5XUuDZXD5cyaVMOQ5_BtFS3jKfcP89MOM",
+  "room_id": "!bEWtlqtDwCLFIAKAcv:matrix.org"
+}
+```
+
+### Edit
+
+```json
+{
+  "content": {
+    "body": " * ...",
+    "m.new_content": {
+      "body": "...",
+      "msgtype": "m.text"
+    },
+    "m.relates_to": {
+      "event_id": "$OXL0yk18y-VG3DuTybVh9j9cvdjjnnzWbBKY-QPXJ-0",
+      "rel_type": "m.replace"
+    },
+    "msgtype": "m.text"
+  },
+  "origin_server_ts": 1621264902371,
+  "room_id": "!bEWtlqtDwCLFIAKAcv:matrix.org",
+  "sender": "@alice:matrix.org",
+  "type": "m.room.message",
+  "unsigned": {
+    "age": 83636544
+  },
+  "event_id": "$Z7sFSKWtLTFoMMabkPFe0PSKWpkakjWUkYQeBU8IHVc",
+  "user_id": "@alice:matrix.org",
+  "age": 83636544
+}
+```
+
+### Reply
+```json
+{
+  "content": {
+    "body": "...",
+    "format": "org.matrix.custom.html",
+    "formatted_body": "...",
+    "m.relates_to": {
+      "m.in_reply_to": {
+        "event_id": "$rGD9iQ93UmopkkagJ0tW_FHATa8IrvABg9cM_tNUvu4"
+      }
+    },
+    "msgtype": "m.text"
+  },
+  "origin_server_ts": 1621242338597,
+  "room_id": "!bEWtlqtDwCLFIAKAcv:matrix.org",
+  "sender": "@bob:matrix.org",
+  "type": "m.room.message",
+  "unsigned": {
+    "age": 106408661,
+    "m.relations": {
+      "m.annotation": {
+        "chunk": [
+          {
+            "type": "m.reaction",
+            "key": "👍️",
+            "count": 1
+          }
+        ]
+      }
+    }
+  },
+  "event_id": "$yS_n5n3cIO2aTtek0_2ZSlv-7g4YYR2zKrk2mFCW_q4",
+  "user_id": "@bob:matrix.org",
+  "age": 106408661
+}
+```
+
+### Remaining spec issues
+
+ - m.in_reply_to vs rel_type
+ - reactions in unsigned can't be deduplicated
+ - how to sort edits? for now we went with origin_server_ts
+ - do we say anything about events of a different type replacing an event?
+ - do we specify that replies should be to the original event, not the edit?
+
+## What to store denormalized on the event itself?
+
+```json
+{
+ 	"reactions": {
+ 		"👍": {"count": 3, "me": true, "firstTimestamp": 2323989},
+ 		"👋": {"count": 1, "me": false, "firstTimestamp": 2323989}
+ 	},
+ 	"replacingEvent": {
+ 		"event_id": "$abc",
+ 		"origin_server_ts": ?,
+ 		"content": {}
+ 	}
+}
+```
+
+we only need the m.new_content and event id of the replacing event, even timestamp we can load the event for on hover?
+
+
+store the replacing event along the original event because we need to keep the original event along somewhere, but for displaying purposes, we'd use the content of the replacingEvent. Should we just store the content of the replacing event? Or even just the `m.new_content`? Could make sense, but perhaps also store the new timestamp along. How about whem somebody than the sender edits?
+
+# Aggregation
+
+what do we do with the aggregated timestamps? do we store them? if so, where?
+
+when we hover reactions, we want to show the authors, rather than the timestamp, so we'll need to call /relations for that anyway. so no need to store the timestamp?
+
+`/relations` is in fact a bit the server-side version of our `event_relations` store
+
+## Dealing with gappy syncs
+
+Doesn't look like synapse currently tells us which target events have outdates relations after a gappy sync. MSC 2675 proposes `stale_events`, but inspecting network traffic, that doesn't seem to be implemented right now.
+
+So, if we locally would need to determine if relations are outdated, we could look if any of the fragments between an event and the last synced event have pagination tokens. Although we have no way to clear this "flag" if we were to fetch the relations after this.
+
+As an initial cut it is probably fine if reactions and edits are outdated unless you scroll up all the way to an event (and hence back-fill), as this is what we'll always do (apart from permalinks).
+
+### Permalinks
+
+So once we do support permalinks, how do we solve this? Element solves this by not storing `/context` and the `/messages` requests around, hence it is always fresh.
+
+We could store the live fragment id in events when we refresh their `/relations`, and if it is not the current live fragment id, you're outdated.
+
+To accurately display anything not in the live fragment, we either need to:
+ - backfill until there are no more gaps between the event fragment and the live fragment.
+ 	- --  there is no way to know how many events this would load.
+ 	- ++  that we know which gaps we've already filled
+ 	- ++  we need to do this for e2ee rooms anyway
+ 	- ++  we need to implement this anyway for non-gappy sync
+ 	- ++  we can only do this as an initial cut, especially as we don't support permalinks yet
+ - Refetch the `/context` and `/messages` for what is on the screen and reconcile.
+ 	- ++  we know how much we'll fetch
+ 	- --  we need to fetch everything again if we have one small gap
+ 	- we store the current live fragment when doing this, so can know:
+ 		- if we need to refetch / if there is a gap
+ 		- how many gaps we need to fill
+ 	- could we fall back to this strategy if the first one takes too long/many events?
+ 	- we could pick a heuristic to pick either strategy (like time between syncs or try for x events and if the gap is not closed, give up)?
+ - Refetch /aggregations for every event
+ 	- ++  we don't get the events (we dont need? edits?)
+ 	- --- need to do it for every event
+ - use `stale_events` if we actually implement it one day
+ 	- this can work well with the first strategy, we'd store a "relationsStale" flag on the event, and refetch /relations immediately or  if scrolled into view.
+
+# API
+
+## Reactions
+
+```js
+const reaction = eventEntry.react("👍");
+room.sendEvent("m.reaction", reaction);
+```
+
+```js
+// this is an ObservableMap mapping the key to the count (or rather SortedArray?)
+// probably fine to just use a SortedArray to sorts by count, then key
+// actually, maybe better to do ObservableMap and store first timestamp so we can support https://github.com/vector-im/element-web/issues/9698 outside of SDK.
+const reactions = eventEntry.reactions.sortValues((r1, r2) => r1.count - r2.count);
+new ListView({list: reactions}, reaction => new ReactionView(reaction, room));
+// reaction has:
+reaction.key
+reaction.hasMyReaction // how do we get this from the bundled events?
+reaction.count
+reaction.firstTimestamp
+room.sendEvent("m.reaction", reaction.react());
+// this won't work as we don't have the event id:
+// room.sendRedaction(reaction.redact());
+```
+
+## Edits
+
+```js
+const replacement = eventEntry.replace({});
+room.sendEvent(eventEntry.eventType, replacement);
+```
+
+## Replies
+
+```js
+const reply = eventEntry.reply({});
+room.sendEvent("m.room.message", reply);
+```
+
+## Redactions
+
+```js
+const redaction = eventEntry.redact();
+room.sendRedaction(redaction);
+```
+
+All off these reaction and edit entries should probably not be live, and at some point in the future if we need them to be live for some use case, we can add an additional api to make them live with an explicit release mechanism?
+```js
+
+// there is no api to get the reactions by sender though, so perhaps we need to load them all and then find our own?
+const reactions = await eventEntry.getReactionEntries("👍");
+const reaction = reactions.find(r => r.sender = ownUserId);
+room.sendRedaction(reaction.redact());
+```
+
+```js
+const edits = await eventEntry.getEdits();
+room.sendRedaction(edits[1].redact());
+```
+
+```js
+const lastEdit = await eventEntry.getLastEdit();
+room.sendRedaction(lastEdit.redact());
+```
+

doc/impl-thoughts/REPLIES.md

@@ -0,0 +1,17 @@
+If we were to render replies in a smart way (instead of relying on the fallback), we would
+need to manually find entries that are pointed to be `in_reply_to`. Consulting the timeline
+code, it seems appropriate to add a `_replyingTo` field to a `BaseEventEntry` (much like we
+have `_pendingAnnotations` and `pendingRedactions`). We can then:
+* use `TilesCollection`'s `_findTileIdx` to find the tile of the message being replied to,
+  and put a reference to its tile into the new tile being created (?).
+  * It doesn't seem appropriate to add an additional argument to TileCreator, but we may
+    want to re-use tiles instead of creating duplicate ones. Otherwise, of course, `tileCreator`
+    can create more than one tile from an entry's `_replyingTo` field.
+* Resolve `_replyingTo` much like we resolve `redactingEntry` in timeline: search by `relatedTxnId`
+  and `relatedEventId` if our entry is a reply (we can add an `isReply` flag there).
+  * This works fine for local entries, which are loaded via an `AsyncMappedList`, but what
+    about remote entries? They are not loaded asynchronously, and the fact that they are
+    not a derived collection is used throughout `Timeline`.
+* Entries that don't have replies that are loadeded (but that are replies) probably need
+  to be tracked somehow?
+  * Then, on timeline add, check new IDs and update corresponding entries

doc/impl-thoughts/SDK.md

@@ -0,0 +1,109 @@
+SDK:
+
+ - we need to compile src/lib.ts to javascript, with a d.ts file generated as well. We need to compile to javascript once for cjs and once of es modules. The package.json looks like this:
+
+```
+"main": "./dist/index.cjs",
+  "exports": {
+    "import": "./dist/index.mjs",
+    "require": "./dist/index.cjs"
+  },
+  "types": "dist/index.d.ts",
+```
+
+we don't need to bundle for the sdk case! we might need to do some transpilation to just plain ES6 (e.g. don't assume ?. and ??) we could use a browserslist query for this e.g. `node 14`. esbuild seems to support this as well, tldraw uses esbuild for their build.
+
+one advantage of not bundling the files for the sdk is that you can still use import overrides in the consuming project build settings. is that an idiomatic way of doing things though?
+
+
+
+
+this way we will support typescript, non-esm javascript and esm javascript using libhydrogen as an SDK
+
+got this from https://medium.com/dazn-tech/publishing-npm-packages-as-native-es-modules-41ffbc0a9dea
+
+how about the assets?
+
+we also need to build the app
+
+we need to be able to version libhydrogen independently from hydrogen the app? as any api breaking changes will need a major version increase. we probably want to end up with a monorepo where the app uses the sdk as well and we just use the local code with yarn link?
+
+## Assets
+
+we want to provide scss/sass files, but also css that can be included
+https://github.com/webpack/webpack/issues/7353 seems to imply that we just need to include the assets in the published files and from there on it is the consumer of libhydrogen's problem.
+
+
+how does all of this tie in with vite?
+
+
+we want to have hydrogenapp be a consumer of libhydrogen, potentially as two packages in a monorepo ... but we want the SDK to expose views and stylesheets... without having an index.html (which would be in hydrogenapp). this seems a bit odd...?
+
+what would be in hydrogenapp actually? just an index.html file?
+
+I'm not sure it makes sense to have them be 2 different packages in a monorepo, they should really be two artifacts from the same directory.
+
+the stylesheets included in libhydrogen are from the same main.css file as is used in the app
+
+https://www.freecodecamp.org/news/build-a-css-library-with-vitejs/
+
+basically, we import the sass file from src/lib.ts so it is included in the assets there too, and we also create a plugin that emits a file for every sass file as suggested in the link above?
+
+we probably want two different build commands for the app and the sdk though, we could have a parent vite config that both build configs extend from?
+
+
+### Dependency assets
+our dependencies should not be bundled for the SDK case. So if we import aesjs, it would be up to the build system of the consuming project to make that import work.
+
+the paths.ts thingy ... we want to make it easy for people to setup the assets for our dependencies (olm), some assets are also part of the sdk itself. it might make sense to make all of the assets there part of the sdk (e.g. bundle olm.wasm and friends?) although shipping crypto, etc ...
+
+perhaps we should have an include file per build system that treats own assets and dep assets the same by including the package name as wel for our own deps:
+```js
+import _downloadSandboxPath from "@matrix-org/hydrogen-sdk/download-sandbox.html?url";
+import _serviceWorkerPath from "@matrix-org/hydrogen-sdk/sw.js?url"; // not yet sure this is the way to do it
+import olmWasmPath from "@matrix-org/olm/olm.wasm?url";
+import olmJsPath from "@matrix-org/olm/olm.js?url";
+import olmLegacyJsPath from "@matrix-org/olm/olm_legacy.js?url";
+
+export const olmPaths = {
+    wasm: olmWasmPath,
+    legacyBundle: olmLegacyJsPath,
+    wasmBundle: olmJsPath,
+};
+
+export const downloadSandboxPath = _downloadSandboxPath;
+```
+
+we could put this file per build system, as ESM, in dist as well so you can include it to get the paths
+
+
+## Tooling
+
+ - `vite` a more high-level build tool that takes your index.html and turns it into optimized assets that you can host for production, as well as a very fast dev server. is used to have good default settings for our tools, typescript support, and also deals with asset compiling. good dev server. Would be nice to have the same tool for dev and prod. vite has good support for using `import` for anything that is not javascript, where we had an issue with `snowpack` (to get the prod path of an asset).
+ - `rollup`: inlines 
+ - `lerna` is used to handle multi-package monorepos
+ - `esbuild`: a js/ts build tool that we could use for building the lower level sdk where no other assets are involved, `vite` uses it for fast dev builds (`rollup` for prod). For now we won't extract a lower level sdk though.
+
+
+## TODO
+
+ - finish vite app build (without IE11 for now?)
+ - create vite config to build src/lib.ts in cjs and esm, inheriting from a common base config with the app config
+    - this will create a dist folder with
+        - the whole source tree in es and cjs format
+        - an es file to import get the asset paths as they are expected by Platform, per build system
+        - assets from hydrogen itself:
+            - css files and any resource used therein
+            - download-sandbox.html
+        - a type declaration file (index.d.ts)
+
+## Questions
+ - can rollup not bundle the source tree and leave modules intact?
+    - if we can use a function that creates a chunk per file to pass to manualChunks and disable chunk hashing we can probably do this. See https://rollupjs.org/guide/en/#outputmanualchunks
+
+    looks like we should be able to disable chunk name hashing with chunkFileNames https://rollupjs.org/guide/en/#outputoptions-object
+
+
+    we should test this with a vite test config
+ 
+    we also need to compile down to ES6, both for the app and for the sdk

doc/invites.md

@@ -3,4 +3,118 @@
  - invite_state doesn't update over /sync
  - can we reuse room summary? need to clear when joining
  - rely on filter operator to split membership=join from membership=invite?
- - 
+
+ - invite_state comes once, and then not again
+ - only state (no heroes for example, but we do get the members)
+ - wants:
+    - different class to represent invited room, with accept or reject method?
+    - make it somewhat easy to render just joined rooms (rely on filter and still put them all in the same observable map)
+    - make the transition from invite to joined smooth
+    - reuse room summary logic?
+
+    InvitedRoom
+        isDM
+        isEncrypted
+        name
+
+        timestamp
+        accept()
+        reject()
+    JoiningRoom
+        to store intent of room you joined through directory, invite, or just /join roomid
+        also joining is retried when coming back online
+
+        forget()
+    Room
+
+    so, also taking into account that other types of room we might not want to expose through session.rooms will have invites,
+    perhaps it is best to expose invites through a different observable collection. You can always join/concat them to show in
+    the same list.
+
+    How do we handle a smooth UI transition when accepting an invite though?
+    For looking at the room itself:
+        - we would attach to the Invite event emitter, and we can have a property "joined" that we would update. Then you know you can go look for the room (or even allow to access the room through a property?)
+        - so this way the view model can know when to switch and signal the view
+    For the room list:
+        - the new Room will be added at exactly the same moment the Invite is removed,
+        so it should already be fairly smooth whether they are rendered in the same list or not.
+
+    How will we locate the Invite/Room during sync when we go from invite => join?
+     - have both adhere to sync target api (e.g. prepareSync, ...) and look in invite map
+       if room id is not found in room map in session.getroom.
+     - how do we remove the invite when join?
+        - we ca
+    Where to store?
+        - room summaries?
+        - do we have an interest in keeping the raw events?
+        - room versions will add another layer of indirection to the room summaries (or will it? once you've upgraded the room, we don't care too much anymore about the details of the old room? hmmm, we do care about whether it is encrypted or not... we need everything to be able to show the timeline in any case)
+
+
+        Invite => accept() => Room  (ends up in session.rooms)
+         (.type)           => Space (ends up in session.spaces)
+        Invite:
+            - isEncrypted
+            - isDM
+            - type
+            - id
+            - name
+            - avatarUrl
+            - timestamp
+            - joinRule (to say wheter you cannot join this room again if you reject)
+
+
+
+        new "memberships":
+            joining (when we want to join/are joining but haven't received remote echo yet)
+            leaving (needed?)
+
+            maybe it's slightly overkill to persist the intent of joining or leaving a room,
+            but I do want a way to local echo joining a room,
+            so that it immediately appears in the room list when clicking join in the room directory / from a url ... how would we sort these rooms though? we can always add another collection, but I'm not sure invites should be treated the same, they can already local echo on the invite object itself.
+
+
+        since invites don't update, we could, in sync when processing a new join just set a flag on the roomsyncstate if a room is newly created and in writeSync/afterSync check if there is a `session.invites.get(id)` and call `writeSync/afterSync` on it as well. We need to handle leave => invite as well. So don't check for invites only if it is a new room, but also if membership is leave
+
+        transitions are:
+            invite => join
+            invite => leave
+            invite => ban
+            join => left
+            join => ban
+            leave => invite
+            leave => join
+            leave => ban
+            ban => leave
+            none => invite
+            none => join
+            none => ban
+
+        kick should keep the room & timeline visible (even in room list, until you archive?)
+        leave should close the room. So explicit archive() step on room ?
+
+        Room => leave() => ArchivedRoom (just a Room loaded from archived_room_summaries) => .forget()
+                   => .forget()
+
+        Room receives leave membership
+            - if sender === state_key, we left, and we archive the room (remove it from the room list, but keep it in storage)
+            - if sender !== state_key, we got kicked, and we write the membership but don't archive so it stays in the room list until you call archive/forget on the room
+        when calling room.leave(), do you have to call archive() or forget() after as well? or rather param of leave and stored intent? sounds like non-atomical operation to me ...
+        we should be able to archive or forget before leave remote echo arrives
+
+        if two stores, this could mean we could have both an invite and a room with kicked state for a given room id?
+        
+        we should avoid key collisions between `session.invites` and `session.rooms` (also `session.archivedRooms` once supported?) in any case,
+        because if we join them to display in one list, things get complicated.
+
+        avoiding key collisions can happen both with 1 or multiple stores for different room states and is just a matter
+        of carefully removing one state representation before adding another one.
+            so a kicked or left room would disappear from session.rooms when an invite is synced?
+            this would prevent you from seeing the old timeline for example, and if you reject, the old state would come back?
+
+
+# Decisions
+ - we expose session.invites separate from session.rooms because they are of a different type.
+   This way, you only have methods on the object that make sense (accept on Room does not make sense, like Invite.openTimeline doesn't make sense)
+ - we store invites (and likely also archived rooms) in a different store, so that we don't have to clear/add properties where they both differ when transitioning. Also, this gives us the possibility to show the timeline on a room that you have previously joined, as the room summary and invite can exist at the same time. (need to resolve key collision question though for this)
+ - we want to keep kicked rooms in the room list until explicitly archived
+ - room id collisions between invites and rooms, can we implement a strategy to prefer invites in the join operator?

index.html

@@ -1,41 +0,0 @@
-<!DOCTYPE html>
-<html>
-    <head>
-        <meta charset="utf-8">
-        <meta name="viewport" content="width=device-width, user-scalable=no">
-        <meta name="application-name" content="Hydrogen Chat"/>
-        <meta name="apple-mobile-web-app-capable" content="yes">
-        <meta name="apple-mobile-web-app-status-bar-style" content="black">
-        <meta name="apple-mobile-web-app-title" content="Hydrogen Chat">
-        <meta name="description" content="A matrix chat application">
-        <link rel="apple-touch-icon" href="assets/icon-maskable.png">
-        <link rel="stylesheet" type="text/css" href="src/platform/web/ui/css/main.css">
-        <link rel="stylesheet" type="text/css" href="src/platform/web/ui/css/themes/element/theme.css" title="Element Theme">
-        <link rel="alternate stylesheet" type="text/css" href="src/platform/web/ui/css/themes/bubbles/theme.css" title="Bubbles Theme">
-    </head>
-    <body class="hydrogen">
-        <script id="version" type="disabled">
-            window.HYDROGEN_VERSION = "%%VERSION%%";
-            window.HYDROGEN_GLOBAL_HASH = "%%GLOBAL_HASH%%";
-        </script>
-        <script id="main" type="module">
-            import {main} from "./src/main.js";
-            import {Platform} from "./src/platform/web/Platform.js";
-            main(new Platform(document.body, {
-                worker: "src/worker.js",
-                downloadSandbox: "assets/download-sandbox.html",
-                defaultHomeServer: "matrix.org",
-                // NOTE: uncomment this if you want the service worker for local development
-                // serviceWorker: "sw.js",
-                // NOTE: provide push config if you want push notifs for local development
-                //       see assets/config.json for what the config looks like
-                // push: {...},
-                olm: {
-                    wasm: "lib/olm/olm.wasm",
-                    legacyBundle: "lib/olm/olm_legacy.js",
-                    wasmBundle: "lib/olm/olm.js",
-                }
-            }, null, {development: true}));
-        </script>
-    </body>
-</html>

package.json

@@ -1,16 +1,24 @@
 {
   "name": "hydrogen-web",
-  "version": "0.1.43",
+  "version": "0.3.1",
   "description": "A javascript matrix client prototype, trying to minize RAM usage by offloading as much as possible to IndexedDB",
-  "main": "index.js",
   "directories": {
     "doc": "doc"
   },
+  "enginesStrict": {
+    "node": ">=15"
+  },
   "scripts": {
-    "test": "node_modules/.bin/impunity --entry-point src/main.js --force-esm-dirs lib/ src/",
-    "start": "node scripts/serve-local.js",
-    "build": "node --experimental-modules scripts/build.mjs",
-    "postinstall": "node ./scripts/post-install.js"
+    "lint": "eslint --cache src/",
+    "lint-ts": "eslint src/ -c .ts-eslintrc.js --ext .ts",
+    "lint-ci": "eslint src/",
+    "test": "impunity --entry-point src/platform/web/main.js src/platform/web/Platform.js --force-esm-dirs lib/ src/ --root-dir src/",
+    "test:postcss": "impunity --entry-point  scripts/postcss/tests/css-compile-variables.test.js scripts/postcss/tests/css-url-to-variables.test.js",
+    "test:sdk": "yarn build:sdk && cd ./scripts/sdk/test/ && yarn --no-lockfile && node test-sdk-in-esm-vite-build-env.js && node test-sdk-in-commonjs-env.js",
+    "start": "vite --port 3000",
+    "build": "vite build && ./scripts/cleanup.sh",
+    "build:sdk": "./scripts/sdk/build.sh",
+    "watch:sdk": "./scripts/sdk/build.sh && yarn run vite build -c vite.sdk-lib-config.js --watch"
   },
   "repository": {
     "type": "git",
@@ -23,37 +31,36 @@
   },
   "homepage": "https://github.com/vector-im/hydrogen-web/#readme",
   "devDependencies": {
-    "@babel/core": "^7.11.1",
-    "@babel/preset-env": "^7.11.0",
-    "@rollup/plugin-babel": "^5.1.0",
-    "@rollup/plugin-multi-entry": "^4.0.0",
-    "autoprefixer": "^10.0.1",
-    "cheerio": "^1.0.0-rc.3",
-    "commander": "^6.0.0",
+    "@typescript-eslint/eslint-plugin": "^4.29.2",
+    "@typescript-eslint/parser": "^4.29.2",
+    "acorn": "^8.6.0",
+    "acorn-walk": "^8.2.0",
+    "aes-js": "^3.1.2",
+    "bs58": "^4.0.1",
     "core-js": "^3.6.5",
-    "finalhandler": "^1.1.1",
-    "impunity": "^1.0.0",
+    "es6-promise": "https://github.com/bwindels/es6-promise.git#bwindels/expose-flush",
+    "escodegen": "^2.0.0",
+    "eslint": "^7.32.0",
+    "fake-indexeddb": "^3.1.2",
+    "impunity": "^1.0.9",
     "mdn-polyfills": "^5.20.0",
-    "postcss": "^8.1.1",
-    "postcss-css-variables": "^0.17.0",
-    "postcss-flexbugs-fixes": "^4.2.1",
-    "postcss-import": "^12.0.1",
-    "postcss-url": "^8.0.0",
+    "merge-options": "^3.0.4",
+    "node-html-parser": "^4.0.0",
+    "postcss-css-variables": "^0.18.0",
+    "postcss-flexbugs-fixes": "^5.0.2",
+    "postcss-value-parser": "^4.2.0",
     "regenerator-runtime": "^0.13.7",
-    "rollup-plugin-cleanup": "^3.1.1",
-    "serve-static": "^1.13.2",
+    "svgo": "^2.8.0",
+    "text-encoding": "^0.7.0",
+    "typescript": "^4.7.0",
+    "vite": "^2.9.8",
     "xxhashjs": "^0.2.2"
   },
   "dependencies": {
-    "rollup": "^2.26.4",
-    "@rollup/plugin-commonjs": "^15.0.0",
-    "@rollup/plugin-node-resolve": "^9.0.0",
-    "aes-js": "^3.1.2",
+    "@matrix-org/olm": "https://gitlab.matrix.org/api/v4/projects/27/packages/npm/@matrix-org/olm/-/@matrix-org/olm-3.2.8.tgz",
     "another-json": "^0.2.0",
     "base64-arraybuffer": "^0.2.0",
-    "bs58": "^4.0.1",
-    "es6-promise": "https://github.com/bwindels/es6-promise.git#bwindels/expose-flush",
-    "olm": "https://packages.matrix.org/npm/olm/olm-3.1.4.tgz",
-    "text-encoding": "^0.7.0"
+    "dompurify": "^2.3.0",
+    "off-color": "^2.0.0"
   }
 }

prototypes/idb-continue-on-constrainterror.html

@@ -0,0 +1,100 @@
+<!DOCTYPE html>
+<html>
+<head>
+    <meta charset="utf-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1">
+</head>
+<body>
+    <script type="text/javascript">
+        class IDBError extends Error {
+            constructor(errorEvent) {
+                const request = errorEvent.target;
+                const {error} = request;
+                super(error.message);
+                this.name = error.name;
+                this.errorEvent = errorEvent;
+            }
+
+            preventAbort() {
+                this.errorEvent.preventDefault();
+            }
+        }
+
+        class AbortError extends Error {
+            get name() { return "AbortError"; }
+        }
+
+        function reqAsPromise(req) {
+            return new Promise(function (resolve, reject) {
+                req.onsuccess = function(e) {
+                    resolve(e.target.result);
+                };
+                req.onerror = function(e) {
+                    reject(new IDBError(e));
+                };
+            });
+        }
+
+        function txnAsPromise(txn) {
+            return new Promise((resolve, reject) => {
+                txn.addEventListener("complete", () => resolve());
+                txn.addEventListener("abort", event => {
+                    reject(new AbortError());
+                });
+            });
+        }
+
+        function Storage(databaseName) {
+            this._databaseName = databaseName;
+            this._database = null;
+        }
+
+        Storage.prototype = {
+            open: function() {
+                const req = window.indexedDB.open(this._databaseName);
+                const self = this;
+                req.onupgradeneeded = function(ev) {
+                    const db = ev.target.result;
+                    const oldVersion = ev.oldVersion;
+                    self._createStores(db, oldVersion);
+                }; 
+                return reqAsPromise(req).then(function() {
+                    self._database = req.result;
+                });
+            },
+            readWriteTxn: function(storeName) {
+                return this._database.transaction([storeName], "readwrite");
+            },
+            readTxn: function(storeName) {
+                return this._database.transaction([storeName], "readonly");
+            },
+            _createStores: function(db) {
+                db.createObjectStore("foos", {keyPath: "id"});
+            }
+        };
+
+        async function main() {
+            const storage = new Storage("idb-continue-on-constrainterror");
+            await storage.open();
+            const txn1 = storage.readWriteTxn("foos");
+            const store = txn1.objectStore("foos");
+            await reqAsPromise(store.clear());
+            console.log("first foo read back", await reqAsPromise(store.get(5)));
+            await reqAsPromise(store.add({id: 5, name: "Mr Foo"}));
+            try {
+                await reqAsPromise(store.add({id: 5, name: "bar"}));
+            } catch (err) {
+                console.log("we did get an error", err.name);
+                err.preventAbort();
+            }
+            await txnAsPromise(txn1);
+
+            const txn2 = storage.readTxn("foos");
+            const store2 = txn2.objectStore("foos");
+            console.log("got name from second txn", await reqAsPromise(store2.get(5)));
+        }
+        main().catch(err => console.error(err));
+    </script>
+</body>
+</html>
+ 

scripts/.eslintrc.js

@@ -0,0 +1,18 @@
+module.exports = {
+    "env": {
+        "node": true,
+        "es6": true
+    },
+    "extends": "eslint:recommended",
+    "parserOptions": {
+        "ecmaVersion": 2020,
+        "sourceType": "module"
+    },
+    "rules": {
+        "no-console": "off",
+        "no-empty": "off",
+        "no-prototype-builtins": "off",
+        "no-unused-vars": "warn"
+    },
+};
+

scripts/build-plugins/manifest.js

@@ -0,0 +1,51 @@
+const fs = require('fs/promises');
+const path = require('path');
+
+module.exports = function injectWebManifest(manifestFile) {
+    let root;
+    let base;
+    let manifestHref;
+    return {
+        name: "hydrogen:injectWebManifest",
+        apply: "build",
+        configResolved: config => {
+            root = config.root;
+            base = config.base;
+        },
+        transformIndexHtml: {
+            transform(html) {
+                return [{
+                    tag: "link",
+                    attrs: {rel: "manifest", href: manifestHref},
+                    injectTo: "head"
+                }];
+            },
+        },
+        generateBundle: async function() {
+            const absoluteManifestFile = path.resolve(root, manifestFile);
+            const manifestDir = path.dirname(absoluteManifestFile);
+            const json = await fs.readFile(absoluteManifestFile, {encoding: "utf8"});
+            const manifest = JSON.parse(json);
+            for (const icon of manifest.icons) {
+                const iconFileName = path.resolve(manifestDir, icon.src);
+                const imgData = await fs.readFile(iconFileName);
+                const ref = this.emitFile({
+                    type: "asset",
+                    name: path.basename(iconFileName),
+                    source: imgData
+                });
+                // we take the basename as getFileName gives the filename
+                // relative to the output dir, but the manifest is an asset
+                // just like they icon, so we assume they end up in the same dir
+                icon.src = path.basename(this.getFileName(ref));
+            }
+            const outputName = path.basename(absoluteManifestFile);
+            const manifestRef = this.emitFile({
+                type: "asset",
+                name: outputName,
+                source: JSON.stringify(manifest)
+            });
+            manifestHref = base + this.getFileName(manifestRef);
+        }
+    };
+}

scripts/build-plugins/rollup-plugin-build-themes.js

@@ -0,0 +1,376 @@
+/*
+Copyright 2021 The Matrix.org Foundation C.I.C.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+const path = require('path').posix;
+const {optimize} = require('svgo');
+
+async function readCSSSource(location) {
+    const fs = require("fs").promises;
+    const resolvedLocation = path.resolve(__dirname, "../../", `${location}/theme.css`);
+    const data = await fs.readFile(resolvedLocation);
+    return data;
+}
+
+function getRootSectionWithVariables(variables) {
+    return `:root{\n${Object.entries(variables).reduce((acc, [key, value]) => acc + `--${key}: ${value};\n`, "")} }\n\n`;
+}
+
+function appendVariablesToCSS(variables, cssSource) {
+    return cssSource + getRootSectionWithVariables(variables);
+}
+
+function addThemesToConfig(bundle, manifestLocations, defaultThemes) {
+    for (const [fileName, info] of Object.entries(bundle)) {
+        if (fileName === "config.json") {
+            const source = new TextDecoder().decode(info.source);
+            const config = JSON.parse(source);
+            config["themeManifests"] = manifestLocations;
+            config["defaultTheme"] = defaultThemes;
+            info.source = new TextEncoder().encode(JSON.stringify(config, undefined, 2));
+        }
+    }
+}
+
+/**
+ * Returns an object where keys are the svg file names and the values
+ * are the svg code (optimized)
+ * @param {*} icons Object where keys are css variable names and values are locations of the svg
+ * @param {*} manifestLocation Location of manifest used for resolving path 
+ */
+async function generateIconSourceMap(icons, manifestLocation) {
+    const sources = {};
+    const fileNames = [];
+    const promises = [];
+    const fs = require("fs").promises;
+    for (const icon of Object.values(icons)) {
+        const [location] = icon.split("?");
+        // resolve location against manifestLocation
+        const resolvedLocation = path.resolve(manifestLocation, location);
+        const iconData = fs.readFile(resolvedLocation);
+        promises.push(iconData);
+        const fileName = path.basename(resolvedLocation);
+        fileNames.push(fileName);
+    }
+    const results = await Promise.all(promises);
+    for (let i = 0; i < results.length; ++i)  {
+        const svgString = results[i].toString();
+        const result = optimize(svgString, {
+            plugins: [
+                {
+                    name: "preset-default",
+                    params: {
+                        overrides: { convertColors: false, },
+                    },
+                },
+            ],
+        });
+        const optimizedSvgString = result.data;
+        sources[fileNames[i]] = optimizedSvgString;
+    }
+    return sources;
+}
+
+/**
+ * Returns a mapping from location (of manifest file) to an array containing all the chunks (of css files) generated from that location.
+ * To understand what chunk means in this context, see https://rollupjs.org/guide/en/#generatebundle.
+ * @param {*} bundle Mapping from fileName to AssetInfo | ChunkInfo
+ */
+function getMappingFromLocationToChunkArray(bundle) {
+    const chunkMap = new Map();
+    for (const [fileName, info] of Object.entries(bundle)) {
+        if (!fileName.endsWith(".css") || info.type === "asset" || info.facadeModuleId?.includes("type=runtime")) {
+            continue;
+        }
+        const location = info.facadeModuleId?.match(/(.+)\/.+\.css/)?.[1];
+        if (!location) {
+            throw new Error("Cannot find location of css chunk!");
+        }
+        const array = chunkMap.get(location);
+        if (!array) {
+            chunkMap.set(location, [info]);
+        }
+        else {
+            array.push(info);
+        }
+    }
+    return chunkMap;
+}
+
+/**
+ * Returns a mapping from unhashed file name (of css files) to AssetInfo.
+ * To understand what AssetInfo means in this context, see https://rollupjs.org/guide/en/#generatebundle.
+ * @param {*} bundle Mapping from fileName to AssetInfo | ChunkInfo 
+ */
+function getMappingFromFileNameToAssetInfo(bundle) {
+    const assetMap = new Map();
+    for (const [fileName, info] of Object.entries(bundle)) {
+        if (!fileName.endsWith(".css")) {
+            continue;
+        }
+        if (info.type === "asset") {
+            /**
+             * So this is the css assetInfo that contains the asset hashed file name.
+             * We'll store it in a separate map indexed via fileName (unhashed) to avoid
+             * searching through the bundle array later.
+             */
+            assetMap.set(info.name, info);
+        }
+    }
+    return assetMap;
+}
+
+/**
+ * Returns a mapping from location (of manifest file) to ChunkInfo of the runtime css asset
+ * To understand what ChunkInfo means in this context, see https://rollupjs.org/guide/en/#generatebundle.
+ * @param {*} bundle Mapping from fileName to AssetInfo | ChunkInfo
+ */
+function getMappingFromLocationToRuntimeChunk(bundle) {
+    let runtimeThemeChunkMap = new Map();
+    for (const [fileName, info] of Object.entries(bundle)) {
+        if (!fileName.endsWith(".css") || info.type === "asset") {
+            continue;
+        }
+        const location = info.facadeModuleId?.match(/(.+)\/.+\.css/)?.[1];
+        if (!location) {
+            throw new Error("Cannot find location of css chunk!");
+        }
+        if (info.facadeModuleId?.includes("type=runtime")) {
+            /**
+             * We have a separate field in manifest.source just for the runtime theme,
+             * so store this separately.
+             */
+            runtimeThemeChunkMap.set(location, info);
+        }
+    }
+    return runtimeThemeChunkMap;
+}
+
+module.exports = function buildThemes(options) {
+    let manifest, variants, defaultDark, defaultLight, defaultThemes = {};
+    let isDevelopment = false;
+    const virtualModuleId = '@theme/'
+    const resolvedVirtualModuleId = '\0' + virtualModuleId;
+    const themeToManifestLocation = new Map();
+
+    return {
+        name: "build-themes",
+        enforce: "pre",
+
+        configResolved(config) {
+            if (config.command === "serve") {
+                isDevelopment = true;
+            }
+        },
+
+        async buildStart() {
+            const { themeConfig } = options;
+            for (const location of themeConfig.themes) {
+                manifest = require(`${location}/manifest.json`);
+                const themeCollectionId = manifest.id;
+                themeToManifestLocation.set(themeCollectionId, location);
+                variants = manifest.values.variants;
+                for (const [variant, details] of Object.entries(variants)) {
+                    const fileName = `theme-${themeCollectionId}-${variant}.css`;
+                    if (themeCollectionId === themeConfig.default && details.default) {
+                        // This is the default theme, stash  the file name for later
+                        if (details.dark) {
+                            defaultDark = fileName;
+                            defaultThemes["dark"] = `${themeCollectionId}-${variant}`;
+                        }
+                        else {
+                            defaultLight = fileName;
+                            defaultThemes["light"] = `${themeCollectionId}-${variant}`;
+                        }
+                    }
+                    // emit the css as built theme bundle
+                    if (!isDevelopment) {
+                        this.emitFile({ type: "chunk", id: `${location}/theme.css?variant=${variant}${details.dark ? "&dark=true" : ""}`, fileName, });
+                    }
+                }
+                // emit the css as runtime theme bundle
+                if (!isDevelopment) {
+                    this.emitFile({ type: "chunk", id: `${location}/theme.css?type=runtime`, fileName: `theme-${themeCollectionId}-runtime.css`, });
+                }
+            }
+        },
+
+        resolveId(id) {
+            if (id.startsWith(virtualModuleId)) {
+                return '\0' + id;
+            }
+        },
+
+        async load(id) {
+            if (isDevelopment) {
+                /**
+                 * To load the theme during dev, we need to take a different approach because emitFile is not supported in dev.
+                 * We solve this by resolving virtual file "@theme/name/variant" into the necessary css import.
+                 * This virtual file import is removed when hydrogen is built (see transform hook).
+                 */
+                if (id.startsWith(resolvedVirtualModuleId)) {
+                    let [theme, variant, file] = id.substr(resolvedVirtualModuleId.length).split("/");
+                    if (theme === "default") {
+                        theme = options.themeConfig.default;
+                    }
+                    const location = themeToManifestLocation.get(theme);
+                    const manifest = require(`${location}/manifest.json`);
+                    const variants = manifest.values.variants;
+                    if (!variant || variant === "default") {
+                        // choose the first default variant for now
+                        // this will need to support light/dark variants as well
+                        variant = Object.keys(variants).find(variantName => variants[variantName].default);
+                    }
+                    if (!file) {
+                        file = "index.js";
+                    }
+                    switch (file) {
+                        case "index.js": {
+                            const isDark = variants[variant].dark;
+                            return `import "${path.resolve(`${location}/theme.css`)}${isDark? "?dark=true": ""}";` +
+                                `import "@theme/${theme}/${variant}/variables.css"`;
+                        }
+                        case "variables.css": { 
+                            const variables = variants[variant].variables;
+                            const css =  getRootSectionWithVariables(variables);
+                            return css;
+                        }
+                    }
+                }
+            }
+            else {
+                const result = id.match(/(.+)\/theme.css\?variant=([^&]+)/);
+                if (result) {
+                    const [, location, variant] = result;
+                    const cssSource = await readCSSSource(location);
+                    const config = variants[variant];
+                    return appendVariablesToCSS(config.variables, cssSource);
+                }
+                return null;
+            }
+        },
+
+        transform(code, id) {
+            if (isDevelopment) {
+                return;
+            }
+            /**
+             * Removes develop-only script tag; this cannot be done in transformIndexHtml hook because
+             * by the time that hook runs, the import is added to the bundled js file which would
+             * result in a runtime error.
+             */
+
+            const devScriptTag =
+                /<script type="module"> import "@theme\/.+"; <\/script>/;
+            if (id.endsWith("index.html")) {
+                const htmlWithoutDevScript = code.replace(devScriptTag, "");
+                return htmlWithoutDevScript;
+            }
+        },
+
+        transformIndexHtml(_, ctx) {
+            if (isDevelopment) {
+                // Don't add default stylesheets to index.html on dev
+                return;
+            } 
+            let darkThemeLocation, lightThemeLocation;
+            for (const [, bundle] of Object.entries(ctx.bundle)) {
+                if (bundle.name === defaultDark) {
+                    darkThemeLocation = bundle.fileName;
+                }
+                if (bundle.name === defaultLight) {
+                    lightThemeLocation = bundle.fileName;
+                }
+            }
+            return [
+                {
+                    tag: "link",
+                    attrs: {
+                        rel: "stylesheet",
+                        type: "text/css",
+                        media: "(prefers-color-scheme: dark)",
+                        href: `./${darkThemeLocation}`,
+                        class: "theme",
+                    }
+                },
+                {
+                    tag: "link",
+                    attrs: {
+                        rel: "stylesheet",
+                        type: "text/css",
+                        media: "(prefers-color-scheme: light)",
+                        href: `./${lightThemeLocation}`,
+                        class: "theme",
+                    }
+                },
+            ];
+},
+
+        async generateBundle(_, bundle) {
+            const assetMap = getMappingFromFileNameToAssetInfo(bundle);
+            const chunkMap = getMappingFromLocationToChunkArray(bundle);
+            const runtimeThemeChunkMap = getMappingFromLocationToRuntimeChunk(bundle);
+            const manifestLocations = [];
+            // Location of the directory containing manifest relative to the root of the build output
+            const manifestLocation = "assets";
+            for (const [location, chunkArray] of chunkMap) {
+                const manifest = require(`${location}/manifest.json`);
+                const compiledVariables = options.compiledVariables.get(location);
+                const derivedVariables = compiledVariables["derived-variables"];
+                const icon = compiledVariables["icon"];
+                const builtAssets = {};
+                let themeKey;
+                for (const chunk of chunkArray) {
+                    const [, name, variant] = chunk.fileName.match(/theme-(.+)-(.+)\.css/);
+                    themeKey = name;
+                    const locationRelativeToBuildRoot = assetMap.get(chunk.fileName).fileName;
+                    const locationRelativeToManifest = path.relative(manifestLocation, locationRelativeToBuildRoot);
+                    builtAssets[`${name}-${variant}`] = locationRelativeToManifest;
+                }
+                // Emit the base svg icons as asset
+                const nameToAssetHashedLocation = [];
+                const nameToSource = await generateIconSourceMap(icon, location);
+                for (const [name, source] of Object.entries(nameToSource)) {
+                    const ref = this.emitFile({ type: "asset", name, source });
+                    const assetHashedName = this.getFileName(ref);
+                    nameToAssetHashedLocation[name] = assetHashedName;
+                }
+                // Update icon section in output manifest with paths to the icon in build output 
+                for (const [variable, location] of Object.entries(icon)) {
+                    const [locationWithoutQueryParameters, queryParameters] = location.split("?");
+                    const name = path.basename(locationWithoutQueryParameters);
+                    const locationRelativeToBuildRoot = nameToAssetHashedLocation[name];
+                    const locationRelativeToManifest = path.relative(manifestLocation, locationRelativeToBuildRoot);
+                    icon[variable] = `${locationRelativeToManifest}?${queryParameters}`;
+                }
+                const runtimeThemeChunk = runtimeThemeChunkMap.get(location);
+                const runtimeAssetLocation = path.relative(manifestLocation, assetMap.get(runtimeThemeChunk.fileName).fileName); 
+                manifest.source = {
+                    "built-assets": builtAssets,
+                    "runtime-asset": runtimeAssetLocation,
+                    "derived-variables": derivedVariables,
+                    "icon": icon,
+                };
+                const name = `theme-${themeKey}.json`;
+                manifestLocations.push(`${manifestLocation}/${name}`);
+                this.emitFile({
+                    type: "asset",
+                    name,
+                    source: JSON.stringify(manifest),
+                });
+            }
+            addThemesToConfig(bundle, manifestLocations, defaultThemes);
+        },
+    }
+}

scripts/build-plugins/service-worker.js

@@ -0,0 +1,157 @@
+const fs = require('fs/promises');
+const path = require('path');
+const xxhash = require('xxhashjs');
+
+function contentHash(str) {
+    var hasher = new xxhash.h32(0);
+    hasher.update(str);
+    return hasher.digest();
+}
+
+function injectServiceWorker(swFile, findUnhashedFileNamesFromBundle, placeholdersPerChunk) {
+    const swName = path.basename(swFile);
+    let root;
+    let version;
+    let logger;
+
+    return {
+        name: "hydrogen:injectServiceWorker",
+        apply: "build",
+        enforce: "post",
+        buildStart() {
+            this.emitFile({
+                type: "chunk",
+                fileName: swName,
+                id: swFile,
+            });
+        },
+        configResolved: config => {
+            root = config.root;
+            version = JSON.parse(config.define.DEFINE_VERSION); // unquote
+            logger = config.logger;
+        },
+        generateBundle: async function(options, bundle) {
+            const otherUnhashedFiles = findUnhashedFileNamesFromBundle(bundle);
+            const unhashedFilenames = [swName].concat(otherUnhashedFiles);
+            const unhashedFileContentMap = unhashedFilenames.reduce((map, fileName) => {
+                const chunkOrAsset = bundle[fileName];
+                if (!chunkOrAsset) {
+                    throw new Error("could not get content for uncached asset or chunk " + fileName);
+                }
+                map[fileName] = chunkOrAsset.source || chunkOrAsset.code;
+                return map;
+            }, {});
+            const assets = Object.values(bundle);
+            const hashedFileNames = assets.map(o => o.fileName).filter(fileName => !unhashedFileContentMap[fileName]);
+            const globalHash = getBuildHash(hashedFileNames, unhashedFileContentMap);
+            const placeholderValues = {
+                DEFINE_GLOBAL_HASH: `"${globalHash}"`,
+                ...getCacheFileNamePlaceholderValues(swName, unhashedFilenames, assets, placeholdersPerChunk)
+            };
+            replacePlaceholdersInChunks(assets, placeholdersPerChunk, placeholderValues);
+            logger.info(`\nBuilt ${version} (${globalHash})`);
+        }
+    };
+}
+
+function getBuildHash(hashedFileNames, unhashedFileContentMap) {
+    const unhashedHashes = Object.entries(unhashedFileContentMap).map(([fileName, content]) => {
+        return `${fileName}-${contentHash(Buffer.from(content))}`;
+    });
+    const globalHashAssets = hashedFileNames.concat(unhashedHashes);
+    globalHashAssets.sort();
+    return contentHash(globalHashAssets.join(",")).toString();
+}
+
+const NON_PRECACHED_JS = [
+    "hydrogen-legacy",
+    "olm_legacy.js",
+     // most environments don't need the worker
+    "main.js"
+];
+
+function isPreCached(asset) {
+    const {name, fileName} = asset;
+    return  name.endsWith(".svg") ||
+            name.endsWith(".png") ||
+            name.endsWith(".css") ||
+            name.endsWith(".wasm") ||
+            name.endsWith(".html") ||
+            // the index and vendor chunks don't have an extension in `name`, so check extension on `fileName`
+            fileName.endsWith(".js") && !NON_PRECACHED_JS.includes(path.basename(name));
+}
+
+function getCacheFileNamePlaceholderValues(swName, unhashedFilenames, assets) {
+    const unhashedPreCachedAssets = [];
+    const hashedPreCachedAssets = [];
+    const hashedCachedOnRequestAssets = [];
+
+    for (const asset of assets) {
+        const {name, fileName} = asset;
+        // the service worker should not be cached at all,
+        // it's how updates happen
+        if (fileName === swName) {
+            continue;
+        } else if (unhashedFilenames.includes(fileName)) {
+            unhashedPreCachedAssets.push(fileName);
+        } else if (isPreCached(asset)) {
+            hashedPreCachedAssets.push(fileName);
+        } else {
+            hashedCachedOnRequestAssets.push(fileName);
+        }
+    }
+
+    return {
+        DEFINE_UNHASHED_PRECACHED_ASSETS: JSON.stringify(unhashedPreCachedAssets),
+        DEFINE_HASHED_PRECACHED_ASSETS: JSON.stringify(hashedPreCachedAssets),
+        DEFINE_HASHED_CACHED_ON_REQUEST_ASSETS: JSON.stringify(hashedCachedOnRequestAssets)
+    }
+}
+
+function replacePlaceholdersInChunks(assets, placeholdersPerChunk, placeholderValues) {
+    for (const [name, placeholderMap] of Object.entries(placeholdersPerChunk)) {
+        const chunk = assets.find(a => a.type === "chunk" && a.name === name);
+        if (!chunk) {
+            throw new Error(`could not find chunk ${name} to replace placeholders`);
+        }
+        for (const [placeholderName, placeholderLiteral] of Object.entries(placeholderMap)) {
+            const replacedValue = placeholderValues[placeholderName];
+            const oldCode = chunk.code;
+            chunk.code = chunk.code.replaceAll(placeholderLiteral, replacedValue);
+            if (chunk.code === oldCode) {
+                throw new Error(`Could not replace ${placeholderName} in ${name}, looking for literal ${placeholderLiteral}:\n${chunk.code}`);
+            }
+        }
+    }
+}
+
+/** creates a value to be include in the `define` build settings,
+ * but can be replace at the end of the build in certain chunks.
+ * We need this for injecting the global build hash and the final
+ * filenames in the service worker and index chunk.
+ * These values are only known in the generateBundle step, so we
+ * replace them by unique strings wrapped in a prompt call so no
+ * transformation will touch them (minifying, ...) and we can do a
+ * string replacement still at the end of the build. */
+function definePlaceholderValue(mode, name, devValue) {
+    if (mode === "production") {
+        // note that `prompt(...)` will never be in the final output, it's replaced by the final value
+        // once we know at the end of the build what it is and just used as a temporary value during the build
+        // as something that will not be transformed.
+        // I first considered Symbol but it's not inconceivable that babel would transform this.
+        return `prompt(${JSON.stringify(name)})`;
+    } else {
+        return JSON.stringify(devValue);
+    }
+}
+
+function createPlaceholderValues(mode) {
+    return {
+        DEFINE_GLOBAL_HASH: definePlaceholderValue(mode, "DEFINE_GLOBAL_HASH", null),
+        DEFINE_UNHASHED_PRECACHED_ASSETS: definePlaceholderValue(mode, "UNHASHED_PRECACHED_ASSETS", []),
+        DEFINE_HASHED_PRECACHED_ASSETS: definePlaceholderValue(mode, "HASHED_PRECACHED_ASSETS", []),
+        DEFINE_HASHED_CACHED_ON_REQUEST_ASSETS: definePlaceholderValue(mode, "HASHED_CACHED_ON_REQUEST_ASSETS", []),
+    };
+}
+
+module.exports = {injectServiceWorker, createPlaceholderValues};

scripts/build.mjs

@@ -1,541 +0,0 @@
-/*
-Copyright 2020 Bruno Windels <bruno@windels.cloud>
-Copyright 2020 The Matrix.org Foundation C.I.C.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-    http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
-*/
-
-import cheerio from "cheerio";
-import fsRoot from "fs";
-const fs = fsRoot.promises;
-import path from "path";
-import xxhash from 'xxhashjs';
-import { rollup } from 'rollup';
-import postcss from "postcss";
-import postcssImport from "postcss-import";
-import { fileURLToPath } from 'url';
-import { dirname } from 'path';
-import commander from "commander";
-// needed for legacy bundle
-import babel from '@rollup/plugin-babel';
-// needed to find the polyfill modules in the main-legacy.js bundle
-import { nodeResolve } from '@rollup/plugin-node-resolve';
-// needed because some of the polyfills are written as commonjs modules
-import commonjs from '@rollup/plugin-commonjs';
-// multi-entry plugin so we can add polyfill file to main
-import multi from '@rollup/plugin-multi-entry';
-import removeJsComments from 'rollup-plugin-cleanup';
-// replace urls of asset names with content hashed version
-import postcssUrl from "postcss-url";
-
-import cssvariables from "postcss-css-variables";
-import autoprefixer from "autoprefixer";
-import flexbugsFixes from "postcss-flexbugs-fixes";
-
-const __filename = fileURLToPath(import.meta.url);
-const __dirname = dirname(__filename);
-const projectDir = path.join(__dirname, "../");
-const cssSrcDir = path.join(projectDir, "src/platform/web/ui/css/");
-
-const parameters = new commander.Command();
-parameters
-    .option("--modern-only", "don't make a legacy build")
-    .option("--override-imports <json file>", "pass in a file to override import paths, see doc/SKINNING.md")
-    .option("--override-css <main css file>", "pass in an alternative main css file")
-parameters.parse(process.argv);
-
-async function build({modernOnly, overrideImports, overrideCss}) {
-    // get version number
-    const version = JSON.parse(await fs.readFile(path.join(projectDir, "package.json"), "utf8")).version;
-    let importOverridesMap;
-    if (overrideImports) {
-        importOverridesMap = await readImportOverrides(overrideImports);
-    }
-    const devHtml = await fs.readFile(path.join(projectDir, "index.html"), "utf8");
-    const doc = cheerio.load(devHtml);
-    const themes = [];
-    findThemes(doc, themeName => {
-        themes.push(themeName);
-    });
-    // clear target dir
-    const targetDir = path.join(projectDir, "target/");
-    await removeDirIfExists(targetDir);
-    await createDirs(targetDir, themes);
-    const assets = new AssetMap(targetDir);
-    // copy olm assets
-    const olmAssets = await copyFolder(path.join(projectDir, "lib/olm/"), assets.directory);
-    assets.addSubMap(olmAssets);
-    await assets.write(`hydrogen.js`, await buildJs("src/main.js", ["src/platform/web/Platform.js"], importOverridesMap));
-    if (!modernOnly) {
-        await assets.write(`hydrogen-legacy.js`, await buildJsLegacy("src/main.js", [
-            'src/platform/web/legacy-polyfill.js',
-            'src/platform/web/LegacyPlatform.js'
-        ], importOverridesMap));
-        await assets.write(`worker.js`, await buildJsLegacy("src/platform/web/worker/main.js", ['src/platform/web/worker/polyfill.js']));
-    }
-    // copy over non-theme assets
-    const baseConfig = JSON.parse(await fs.readFile(path.join(projectDir, "assets/config.json"), {encoding: "utf8"}));
-    const downloadSandbox = "download-sandbox.html";
-    let downloadSandboxHtml = await fs.readFile(path.join(projectDir, `assets/${downloadSandbox}`));
-    await assets.write(downloadSandbox, downloadSandboxHtml);
-    // creates the directories where the theme css bundles are placed in,
-    // and writes to assets, so the build bundles can translate them, so do it first
-    await copyThemeAssets(themes, assets);
-    await buildCssBundles(buildCssLegacy, themes, assets, overrideCss);
-    await buildManifest(assets);
-    // all assets have been added, create a hash from all assets name to cache unhashed files like index.html
-    assets.addToHashForAll("index.html", devHtml);
-    let swSource = await fs.readFile(path.join(projectDir, "src/platform/web/service-worker.js"), "utf8");
-    assets.addToHashForAll("sw.js", swSource);
-    
-    const globalHash = assets.hashForAll();
-
-    await buildServiceWorker(swSource, version, globalHash, assets);
-    await buildHtml(doc, version, baseConfig, globalHash, modernOnly, assets);
-    console.log(`built hydrogen ${version} (${globalHash}) successfully with ${assets.size} files`);
-}
-
-async function findThemes(doc, callback) {
-    doc("link[rel~=stylesheet][title]").each((i, el) => {
-        const theme = doc(el);
-        const href = theme.attr("href");
-        const themesPrefix = "/themes/";
-        const prefixIdx = href.indexOf(themesPrefix);
-        if (prefixIdx !== -1) {
-            const themeNameStart = prefixIdx + themesPrefix.length;
-            const themeNameEnd = href.indexOf("/", themeNameStart);
-            const themeName = href.substr(themeNameStart, themeNameEnd - themeNameStart);
-            callback(themeName, theme);
-        }
-    });
-}
-
-async function createDirs(targetDir, themes) {
-    await fs.mkdir(targetDir);
-    const themeDir = path.join(targetDir, "themes");
-    await fs.mkdir(themeDir);
-    for (const theme of themes) {
-        await fs.mkdir(path.join(themeDir, theme));
-    }
-}
-
-async function copyThemeAssets(themes, assets) {
-    for (const theme of themes) {
-        const themeDstFolder = path.join(assets.directory, `themes/${theme}`);
-        const themeSrcFolder = path.join(cssSrcDir, `themes/${theme}`);
-        const themeAssets = await copyFolder(themeSrcFolder, themeDstFolder, file => {
-            return !file.endsWith(".css");
-        });
-        assets.addSubMap(themeAssets);
-    }
-    return assets;
-}
-
-async function buildHtml(doc, version, baseConfig, globalHash, modernOnly, assets) {
-    // transform html file
-    // change path to main.css to css bundle
-    doc("link[rel=stylesheet]:not([title])").attr("href", assets.resolve(`hydrogen.css`));
-    // adjust file name of icon on iOS
-    doc("link[rel=apple-touch-icon]").attr("href", assets.resolve(`icon-maskable.png`));
-    // change paths to all theme stylesheets
-    findThemes(doc, (themeName, theme) => {
-        theme.attr("href", assets.resolve(`themes/${themeName}/bundle.css`));
-    });
-    const configJSON = JSON.stringify(Object.assign({}, baseConfig, {
-        worker: assets.has("worker.js") ? assets.resolve(`worker.js`) : null,
-        downloadSandbox: assets.resolve("download-sandbox.html"),
-        serviceWorker: "sw.js",
-        olm: {
-            wasm: assets.resolve("olm.wasm"),
-            legacyBundle: assets.resolve("olm_legacy.js"),
-            wasmBundle: assets.resolve("olm.js"),
-        }
-    }));
-    const mainScripts = [
-        `<script type="module">import {main, Platform} from "./${assets.resolve(`hydrogen.js`)}"; main(new Platform(document.body, ${configJSON}));</script>`
-    ];
-    if (!modernOnly) {
-        mainScripts.push(
-            `<script type="text/javascript" nomodule src="${assets.resolve(`hydrogen-legacy.js`)}"></script>`,
-            `<script type="text/javascript" nomodule>hydrogen.main(new hydrogen.Platform(document.body, ${configJSON}));</script>`
-        );
-    }
-    doc("script#main").replaceWith(mainScripts.join(""));
-
-    const versionScript = doc("script#version");
-    versionScript.attr("type", "text/javascript");
-    let vSource = versionScript.contents().text();
-    vSource = vSource.replace(`"%%VERSION%%"`, `"${version}"`);
-    vSource = vSource.replace(`"%%GLOBAL_HASH%%"`, `"${globalHash}"`);
-    versionScript.text(vSource);
-    doc("head").append(`<link rel="manifest" href="${assets.resolve("manifest.json")}">`);
-    await assets.writeUnhashed("index.html", doc.html());
-}
-
-async function buildJs(mainFile, extraFiles, importOverrides) {
-    // create js bundle
-    const plugins = [multi(), removeJsComments({comments: "none"})];
-    if (importOverrides) {
-        plugins.push(overridesAsRollupPlugin(importOverrides));
-    }
-    const bundle = await rollup({
-        input: extraFiles.concat(mainFile),
-        plugins
-    });
-    const {output} = await bundle.generate({
-        format: 'es',
-        // TODO: can remove this?
-        name: `hydrogen`
-    });
-    const code = output[0].code;
-    return code;
-}
-
-async function buildJsLegacy(mainFile, extraFiles, importOverrides) {
-    // compile down to whatever IE 11 needs
-    const babelPlugin = babel.babel({
-        babelHelpers: 'bundled',
-        exclude: 'node_modules/**',
-        presets: [
-            [
-                "@babel/preset-env",
-                {
-                    useBuiltIns: "entry",
-                    corejs: "3",
-                    targets: "IE 11",
-                    // we provide our own promise polyfill (es6-promise)
-                    // with support for synchronous flushing of
-                    // the queue for idb where needed 
-                    exclude: ["es.promise", "es.promise.all-settled", "es.promise.finally"]
-                }
-            ]
-        ]
-    });
-    const plugins = [multi(), commonjs()];
-    if (importOverrides) {
-        plugins.push(overridesAsRollupPlugin(importOverrides));
-    }
-    plugins.push(nodeResolve(), babelPlugin);
-    // create js bundle
-    const rollupConfig = {
-        // important the extraFiles come first,
-        // so polyfills are available in the global scope
-        // if needed for the mainfile
-        input: extraFiles.concat(mainFile),
-        plugins
-    };
-    const bundle = await rollup(rollupConfig);
-    const {output} = await bundle.generate({
-        format: 'iife',
-        name: `hydrogen`
-    });
-    const code = output[0].code;
-    return code;
-}
-
-const NON_PRECACHED_JS = [
-    "hydrogen-legacy.js",
-    "olm_legacy.js",
-    "worker.js"
-];
-
-function isPreCached(asset) {
-    return  asset.endsWith(".svg") ||
-            asset.endsWith(".png") ||
-            asset.endsWith(".css") ||
-            asset.endsWith(".wasm") ||
-            asset.endsWith(".html") ||
-            // most environments don't need the worker
-            asset.endsWith(".js") && !NON_PRECACHED_JS.includes(asset);
-}
-
-async function buildManifest(assets) {
-    const webManifest = JSON.parse(await fs.readFile(path.join(projectDir, "assets/manifest.json"), "utf8"));
-    // copy manifest icons
-    for (const icon of webManifest.icons) {
-        let iconData = await fs.readFile(path.join(projectDir, icon.src));
-        const iconTargetPath = path.basename(icon.src);
-        icon.src = await assets.write(iconTargetPath, iconData);
-    }
-    await assets.write("manifest.json", JSON.stringify(webManifest));
-}
-
-async function buildServiceWorker(swSource, version, globalHash, assets) {
-    const unhashedPreCachedAssets = ["index.html"];
-    const hashedPreCachedAssets = [];
-    const hashedCachedOnRequestAssets = [];
-
-    for (const [unresolved, resolved] of assets) {
-        if (unresolved === resolved) {
-            unhashedPreCachedAssets.push(resolved);
-        } else if (isPreCached(unresolved)) {
-            hashedPreCachedAssets.push(resolved);
-        } else {
-            hashedCachedOnRequestAssets.push(resolved);
-        }
-    }
-
-    const replaceArrayInSource = (name, value) => {
-        const newSource = swSource.replace(`${name} = []`, `${name} = ${JSON.stringify(value)}`);
-        if (newSource === swSource) {
-            throw new Error(`${name} was not found in the service worker source`);
-        }
-        return newSource;
-    };
-    const replaceStringInSource = (name, value) => {
-        const newSource = swSource.replace(new RegExp(`${name}\\s=\\s"[^"]*"`), `${name} = ${JSON.stringify(value)}`);
-        if (newSource === swSource) {
-            throw new Error(`${name} was not found in the service worker source`);
-        }
-        return newSource;
-    };
-
-    // write service worker
-    swSource = swSource.replace(`"%%VERSION%%"`, `"${version}"`);
-    swSource = swSource.replace(`"%%GLOBAL_HASH%%"`, `"${globalHash}"`);
-    swSource = replaceArrayInSource("UNHASHED_PRECACHED_ASSETS", unhashedPreCachedAssets);
-    swSource = replaceArrayInSource("HASHED_PRECACHED_ASSETS", hashedPreCachedAssets);
-    swSource = replaceArrayInSource("HASHED_CACHED_ON_REQUEST_ASSETS", hashedCachedOnRequestAssets);
-    swSource = replaceStringInSource("NOTIFICATION_BADGE_ICON", assets.resolve("icon.png"));
-
-    // service worker should not have a hashed name as it is polled by the browser for updates
-    await assets.writeUnhashed("sw.js", swSource);
-}
-
-async function buildCssBundles(buildFn, themes, assets, mainCssFile = null) {
-    if (!mainCssFile) {
-        mainCssFile = path.join(cssSrcDir, "main.css");
-    }
-    const bundleCss = await buildFn(mainCssFile);
-    await assets.write(`hydrogen.css`, bundleCss);
-    for (const theme of themes) {
-        const themeRelPath = `themes/${theme}/`;
-        const themeRoot = path.join(cssSrcDir, themeRelPath);
-        const assetUrlMapper = ({absolutePath}) => {
-            if (!absolutePath.startsWith(themeRoot)) {
-                throw new Error("resource is out of theme directory: " + absolutePath);
-            }
-            const relPath = absolutePath.substr(themeRoot.length);
-            const hashedDstPath = assets.resolve(path.join(themeRelPath, relPath));
-            if (hashedDstPath) {
-                return hashedDstPath.substr(themeRelPath.length);
-            }
-        };
-        const themeCss = await buildFn(path.join(themeRoot, `theme.css`), assetUrlMapper);
-        await assets.write(path.join(themeRelPath, `bundle.css`), themeCss);
-    }
-}
-
-// async function buildCss(entryPath, urlMapper = null) {
-//     const preCss = await fs.readFile(entryPath, "utf8");
-//     const options = [postcssImport];
-//     if (urlMapper) {
-//         options.push(postcssUrl({url: urlMapper}));
-//     }
-//     const cssBundler = postcss(options);
-//     const result = await cssBundler.process(preCss, {from: entryPath});
-//     return result.css;
-// }
-
-async function buildCssLegacy(entryPath, urlMapper = null) {
-    const preCss = await fs.readFile(entryPath, "utf8");
-    const options = [
-        postcssImport,
-        cssvariables(),
-        autoprefixer({overrideBrowserslist: ["IE 11"], grid: "no-autoplace"}),
-        flexbugsFixes()
-    ];
-    if (urlMapper) {
-        options.push(postcssUrl({url: urlMapper}));
-    }
-    const cssBundler = postcss(options);
-    const result = await cssBundler.process(preCss, {from: entryPath});
-    return result.css;
-}
-
-async function removeDirIfExists(targetDir) {
-    try {
-        await fs.rmdir(targetDir, {recursive: true});
-    } catch (err) {
-        if (err.code !== "ENOENT") {
-            throw err;
-        }
-    }
-}
-
-async function copyFolder(srcRoot, dstRoot, filter, assets = null) {
-    assets = assets || new AssetMap(dstRoot);
-    const dirEnts = await fs.readdir(srcRoot, {withFileTypes: true});
-    for (const dirEnt of dirEnts) {
-        const dstPath = path.join(dstRoot, dirEnt.name);
-        const srcPath = path.join(srcRoot, dirEnt.name);
-        if (dirEnt.isDirectory()) {
-            await fs.mkdir(dstPath);
-            await copyFolder(srcPath, dstPath, filter, assets);
-        } else if ((dirEnt.isFile() || dirEnt.isSymbolicLink()) && (!filter || filter(srcPath))) {
-            const content = await fs.readFile(srcPath);
-            await assets.write(dstPath, content);
-        }
-    }
-    return assets;
-}
-
-function contentHash(str) {
-    var hasher = new xxhash.h32(0);
-    hasher.update(str);
-    return hasher.digest();
-}
-
-class AssetMap {
-    constructor(targetDir) {
-        // remove last / if any, so substr in create works well
-        this._targetDir = path.resolve(targetDir);
-        this._assets = new Map();
-        // hashes for unhashed resources so changes in these resources also contribute to the hashForAll
-        this._unhashedHashes = [];
-    }
-
-    _toRelPath(resourcePath) {
-        let relPath = resourcePath;
-        if (path.isAbsolute(resourcePath)) {
-            if (!resourcePath.startsWith(this._targetDir)) {
-                throw new Error(`absolute path ${resourcePath} that is not within target dir ${this._targetDir}`);
-            }
-            relPath = resourcePath.substr(this._targetDir.length + 1); // + 1 for the /
-        }
-        return relPath;
-    }
-
-    _create(resourcePath, content) {
-        const relPath = this._toRelPath(resourcePath);
-        const hash = contentHash(Buffer.from(content));
-        const dir = path.dirname(relPath);
-        const extname = path.extname(relPath);
-        const basename = path.basename(relPath, extname);
-        const dstRelPath = path.join(dir, `${basename}-${hash}${extname}`);
-        this._assets.set(relPath, dstRelPath);
-        return dstRelPath;
-    }
-
-    async write(resourcePath, content) {
-        const relPath = this._create(resourcePath, content);
-        const fullPath = path.join(this.directory, relPath);
-        if (typeof content === "string") {
-            await fs.writeFile(fullPath, content, "utf8");
-        } else {
-            await fs.writeFile(fullPath, content);
-        }
-        return relPath;
-    }
-
-    async writeUnhashed(resourcePath, content) {
-        const relPath = this._toRelPath(resourcePath);
-        this._assets.set(relPath, relPath);
-        const fullPath = path.join(this.directory, relPath);
-        if (typeof content === "string") {
-            await fs.writeFile(fullPath, content, "utf8");
-        } else {
-            await fs.writeFile(fullPath, content);
-        }
-        return relPath;
-    }
-
-    get directory() {
-        return this._targetDir;
-    }
-
-    resolve(resourcePath) {
-        const relPath = this._toRelPath(resourcePath);
-        const result = this._assets.get(relPath);
-        if (!result) {
-            throw new Error(`unknown path: ${relPath}, only know ${Array.from(this._assets.keys()).join(", ")}`);
-        }
-        return result;
-    }
-
-    addSubMap(assetMap) {
-        if (!assetMap.directory.startsWith(this.directory)) {
-            throw new Error(`map directory doesn't start with this directory: ${assetMap.directory} ${this.directory}`);
-        }
-        const relSubRoot = assetMap.directory.substr(this.directory.length + 1);
-        for (const [key, value] of assetMap._assets.entries()) {
-            this._assets.set(path.join(relSubRoot, key), path.join(relSubRoot, value));
-        }
-    }
-
-    [Symbol.iterator]() {
-        return this._assets.entries();
-    }
-
-    isUnhashed(relPath) {
-        const resolvedPath = this._assets.get(relPath);
-        if (!resolvedPath) {
-            throw new Error("Unknown asset: " + relPath);
-        }
-        return relPath === resolvedPath;
-    }
-
-    get size() {
-        return this._assets.size;
-    }
-
-    has(relPath) {
-        return this._assets.has(relPath);
-    }
-
-    hashForAll() {
-        const globalHashAssets = Array.from(this).map(([, resolved]) => resolved);
-        globalHashAssets.push(...this._unhashedHashes);
-        globalHashAssets.sort();
-        return contentHash(globalHashAssets.join(","));
-    }
-
-    addToHashForAll(resourcePath, content) {
-        this._unhashedHashes.push(`${resourcePath}-${contentHash(Buffer.from(content))}`);
-    }
-}
-
-async function readImportOverrides(filename) {
-    const json = await fs.readFile(filename, "utf8");
-    const mapping = new Map(Object.entries(JSON.parse(json)));
-    return {
-        basedir: path.dirname(path.resolve(filename))+path.sep,
-        mapping
-    };
-}
-
-function overridesAsRollupPlugin(importOverrides) {
-    const {mapping, basedir} = importOverrides;
-    return {
-        name: "rewrite-imports",
-        resolveId (source, importer) {
-            let file;
-            if (source.startsWith(path.sep)) {
-                file = source;
-            } else {
-                file = path.join(path.dirname(importer), source);
-            }
-            if (file.startsWith(basedir)) {
-                const searchPath = file.substr(basedir.length);
-                const replacingPath = mapping.get(searchPath);
-                if (replacingPath) {
-                    console.info(`replacing ${searchPath} with ${replacingPath}`);
-                    return path.join(basedir, replacingPath);
-                }
-            }
-            return null;
-        }
-    };
-}
-
-build(parameters).catch(err => console.error(err));

scripts/ci.sh

@@ -0,0 +1,165 @@
+#!/bin/bash
+# ci.sh: Helper script to automate deployment operations on CI/CD
+# Copyright © 2022 Aravinth Manivannan <realaravinth@batsense.net>
+# 
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Affero General Public License as
+# published by the Free Software Foundation, either version 3 of the
+# License, or (at your option) any later version.
+# 
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU Affero General Public License for more details.
+# 
+# You should have received a copy of the GNU Affero General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+set -xEeuo  pipefail
+#source $(pwd)/scripts/lib.sh
+
+readonly SSH_ID_FILE=/tmp/ci-ssh-id
+readonly SSH_REMOTE_NAME=origin-ssh
+readonly PROJECT_ROOT=$(pwd)
+
+match_arg() {
+    if [ $1 == $2 ] || [ $1 == $3 ]
+    then
+        return 0
+    else
+        return 1
+    fi
+}
+
+help() {
+	cat << EOF
+USAGE: ci.sh [SUBCOMMAND]
+Helper script to automate deployment operations on CI/CD
+
+Subcommands
+
+  -c  --clean	cleanup secrets, SSH key and other runtime data
+  -i  --init <SSH_PRIVATE_KEY>	initialize environment, write SSH private to file
+  -d  --deploy <PAGES-SECRET> <TARGET BRANCH>	push branch to Gitea and call Pages server
+  -h  --help	print this help menu
+EOF
+}
+
+# $1: SSH private key
+write_ssh(){
+	truncate --size 0 $SSH_ID_FILE
+	echo "$1" > $SSH_ID_FILE
+	chmod 600 $SSH_ID_FILE
+}
+
+set_ssh_remote() {
+	http_remote_url=$(git remote get-url origin)
+	remote_hostname=$(echo $http_remote_url | cut -d '/' -f 3) 
+	repository_owner=$(echo $http_remote_url | cut -d '/' -f 4)
+	repository_name=$(echo $http_remote_url | cut -d '/' -f 5)
+	ssh_remote="git@$remote_hostname:$repository_owner/$repository_name"
+	ssh_remote="git@git.batsense.net:mystiq/hydrogen-web.git"
+	git remote add $SSH_REMOTE_NAME $ssh_remote
+}
+
+clean() {
+	if [ -f $SSH_ID_FILE ]
+	then
+		shred $SSH_ID_FILE
+		rm $SSH_ID_FILE
+	fi
+}
+
+# $1: branch name
+# $2: directory containing build assets
+# $3: Author in <author-name author@example.com> format
+commit_files() {
+	cd $PROJECT_ROOT
+	original_branch=$(git branch --show-current)
+	tmp_dir=$(mktemp -d)
+	cp -r $2/* $tmp_dir
+
+	if [[ -z $(git ls-remote --heads origin ${1}) ]]
+	then
+		echo "[*] Creating deployment branch $1"
+		git checkout --orphan $1
+	else
+		echo "[*] Deployment branch $1 exists, pulling changes from remote"
+		git fetch origin $1
+		git switch $1 
+	fi
+
+	git rm -rf .
+	/bin/rm -rf *
+	cp -r $tmp_dir/* .
+	git add --all
+	if [ $(git status --porcelain | xargs | sed '/^$/d' | wc -l) -gt 0 ];
+	then
+		echo "[*] Repository has changed, committing changes"
+		git commit \
+			--author="$3" \
+			--message="new deploy: $(date --iso-8601=seconds)"
+	fi
+	git checkout $original_branch
+}
+
+# $1: Pages API secret
+# $2: Deployment target branch
+deploy() {
+	if (( "$#" < 2 ))
+	then
+		help
+	else
+		git -c core.sshCommand="/usr/bin/ssh -oStrictHostKeyChecking=no -i $SSH_ID_FILE"\
+			push --force  $SSH_REMOTE_NAME $2
+		curl -vv --location --request \
+				POST "https://deploy.batsense.net/api/v1/update"\
+				--header 'Content-Type: application/json' \
+				--data-raw "{ \"secret\": \"$1\", \"branch\": \"$2\" }"
+	fi
+}
+
+if (( "$#" < 1 ))
+then
+	help
+	exit -1
+fi
+
+
+if match_arg $1 '-i' '--init'
+then
+	if (( "$#" < 2 ))
+	then
+		help
+		exit -1
+	fi
+	set_ssh_remote
+	write_ssh "$2"
+elif match_arg $1 '-c' '--clean'
+then
+	clean
+elif match_arg $1 '-cf' '--commit-files'
+then
+	if (( "$#" < 4 ))
+	then
+		help
+		exit -1
+	fi
+    commit_files $2 $3 $4
+elif match_arg $1 '-d' '--deploy'
+then
+	if (( "$#" < 3 ))
+	then
+		help
+		exit -1
+	fi
+	deploy $2 $3
+elif match_arg $1 '-h' '--help'
+then
+	help
+else
+	help
+fi
+
+
+

scripts/cleanup.sh

@@ -0,0 +1,3 @@
+#!/bin/sh
+# Remove icons created in .tmp
+rm -rf .tmp

scripts/common.mjs

@@ -1,12 +0,0 @@
-import fsRoot from "fs";
-const fs = fsRoot.promises;
-
-export async function removeDirIfExists(targetDir) {
-    try {
-        await fs.rmdir(targetDir, {recursive: true});
-    } catch (err) {
-        if (err.code !== "ENOENT") {
-            throw err;
-        }
-    }
-}

scripts/deploy.sh

@@ -1,6 +0,0 @@
-git checkout gh-pages
-cp -R target/* .
-git add $(find . -maxdepth 1 -type f)
-git add themes
-git commit -m "update hydrogen"
-git checkout master

scripts/logviewer/index.html

@@ -172,13 +172,36 @@
                 color: HighlightText;
             }
 
+            .timeline .item.highlighted {
+                background-color: fuchsia;
+                color: white;
+            }
+
             .hidden {
                 display: none;
             }
+
+            #highlight {
+                width: 300px;
+            }
+
+            nav form {
+                display: inline;
+            }
         </style>
     </head>
     <body>
-        <nav><button id="openFile">Open log file</button></nav>
+        <nav>
+            <button id="openFile">Open log file</button>
+            <button id="collapseAll">Collapse all</button>
+            <button id="hideCollapsed">Hide collapsed root items</button>
+            <button id="hideHighlightedSiblings" title="Hide collapsed siblings of highlighted">Hide non-highlighted</button>
+            <button id="showAll">Show all</button>
+            <form id="highlightForm">
+                <input type="text" id="highlight" name="highlight" placeholder="Highlight a search term" autocomplete="on">
+                <output id="highlightMatches"></output>
+            </form>
+        </nav>
         <main></main>
         <aside></aside>
         <script type="module" src="main.js"></script>

scripts/logviewer/main.js

@@ -82,12 +82,13 @@ function showItemDetails(item, parent, itemNode) {
     const parentOffset = itemStart(parent) ? `${itemStart(item) - itemStart(parent)}ms` : "none";
     const expandButton = t.button("Expand recursively");
     expandButton.addEventListener("click", () => expandResursively(itemNode.parentElement.parentElement));
+    const start = itemStart(item);
     const aside = t.aside([
         t.h3(itemCaption(item)),
         t.p([t.strong("Log level: "), logLevels[itemLevel(item)]]),
         t.p([t.strong("Error: "), itemError(item) ? `${itemError(item).name} ${itemError(item).stack}` : "none"]),
         t.p([t.strong("Parent offset: "), parentOffset]),
-        t.p([t.strong("Start: "), new Date(itemStart(item)).toString()]),
+        t.p([t.strong("Start: "), new Date(start).toString(), ` (${start})`]),
         t.p([t.strong("Duration: "), `${itemDuration(item)}ms`]),
         t.p([t.strong("Child count: "), itemChildren(item) ? `${itemChildren(item).length}` : "none"]),
         t.p([t.strong("Forced finish: "), (itemForcedFinish(item) || false) + ""]),
@@ -165,6 +166,7 @@ async function loadFile() {
     main.replaceChildren(fragment);
 }
 
+// TODO: make this use processRecursively
 function preprocessRecursively(item, parentElement, refsMap, path) {
     item.s = (parentElement?.s || 0) + item.s;
     if (itemRefSource(item)) {
@@ -296,3 +298,101 @@ function itemToNode(item) {
     }
     return li;
 }
+
+const highlightForm = document.getElementById("highlightForm");
+
+highlightForm.addEventListener("submit", evt => {
+    evt.preventDefault();
+    const matchesOutput = document.getElementById("highlightMatches");
+    const query = document.getElementById("highlight").value;
+    if (query) {
+        matchesOutput.innerText = "Searching…";
+        let matches = 0;
+        processRecursively(rootItem, item => {
+            let domNode = document.getElementById(item.id);
+            if (itemMatchesFilter(item, query)) {
+                matches += 1;
+                domNode.classList.add("highlighted");
+                domNode = domNode.parentElement;
+                while (domNode.nodeName !== "SECTION") {
+                    if (domNode.nodeName === "LI") {
+                        domNode.classList.add("expanded");
+                    }
+                    domNode = domNode.parentElement;
+                }
+            } else {
+                domNode.classList.remove("highlighted");
+            }
+        });
+        matchesOutput.innerText = `${matches} matches`;
+    } else {
+        for (const node of document.querySelectorAll(".highlighted")) {
+            node.classList.remove("highlighted");
+        }
+        matchesOutput.innerText = "";
+    }
+});
+
+function itemMatchesFilter(item, query) {
+    if (itemError(item)) {
+        if (valueMatchesQuery(itemError(item), query)) {
+            return true;
+        }
+    }
+    return valueMatchesQuery(itemValues(item), query);
+}
+
+function valueMatchesQuery(value, query) {
+    if (typeof value === "string") {
+        return value.includes(query);
+    } else if (typeof value === "object" && value !== null) {
+        for (const key in value) {
+            if (value.hasOwnProperty(key) && valueMatchesQuery(value[key], query)) {
+                return true;
+            }
+        }
+    } else if (typeof value === "number") {
+        return value.toString().includes(query);
+    }
+    return false;
+}
+
+function processRecursively(item, callback, parentItem) {
+    if (item.id) {
+        callback(item, parentItem);
+    }
+    if (itemChildren(item)) {
+        for (let i = 0; i < itemChildren(item).length; i += 1) {
+            // do it in advance for a child as we don't want to do it for the rootItem
+            const child = itemChildren(item)[i];
+            processRecursively(child, callback, item);
+        }
+    }
+}
+
+document.getElementById("collapseAll").addEventListener("click", () => {
+    for (const node of document.querySelectorAll(".expanded")) {
+        node.classList.remove("expanded");
+    }
+});
+document.getElementById("hideCollapsed").addEventListener("click", () => {
+    for (const node of document.querySelectorAll("section > div.timeline > ol > li:not(.expanded)")) {
+        node.closest("section").classList.add("hidden");
+    }
+});
+document.getElementById("hideHighlightedSiblings").addEventListener("click", () => {
+    for (const node of document.querySelectorAll(".highlighted")) {
+        const list = node.closest("ol");
+        const siblings = Array.from(list.querySelectorAll("li > div > a:not(.highlighted)")).map(n => n.closest("li"));
+        for (const sibling of siblings) {
+            if (!sibling.classList.contains("expanded")) {
+                sibling.classList.add("hidden");
+            }
+        }
+    }
+});
+document.getElementById("showAll").addEventListener("click", () => {
+    for (const node of document.querySelectorAll(".hidden")) {
+        node.classList.remove("hidden");
+    }
+});

scripts/package-overrides/buffer/index.js

@@ -1,6 +1,7 @@
-module.exports = class Buffer {
-    static isBuffer(array) {return array instanceof Uint8Array;}
-    static from(arrayBuffer) {return arrayBuffer;}
-    static allocUnsafe(size) {return Buffer.alloc(size);}
-    static alloc(size) {return new Uint8Array(size);}
+var Buffer = {
+    isBuffer: function(array) {return array instanceof Uint8Array;},
+    from: function(arrayBuffer) {return arrayBuffer;},
+    allocUnsafe: function(size) {return Buffer.alloc(size);},
+    alloc: function(size) {return new Uint8Array(size);}
 };
+export default Buffer;

scripts/package-overrides/safe-buffer/index.js

@@ -1 +1,2 @@
-module.exports.Buffer = require("buffer");
+import Buffer from "buffer";
+export {Buffer};

scripts/package.sh

@@ -2,6 +2,9 @@ VERSION=$(jq -r ".version" package.json)
 PACKAGE=hydrogen-web-$VERSION.tar.gz
 yarn build
 pushd target
+# move config file so we don't override it
+# when deploying a new version
+mv config.json config.sample.json
 tar -czvf ../$PACKAGE ./
 popd
 echo $PACKAGE

scripts/post-install.js

@@ -1,116 +0,0 @@
-/*
-Copyright 2020 The Matrix.org Foundation C.I.C.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-    http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
-*/
-
-const fsRoot = require("fs");
-const fs = fsRoot.promises;
-const path = require("path");
-const { rollup } = require('rollup');
-const { fileURLToPath } = require('url');
-const { dirname } = require('path');
-// needed to translate commonjs modules to esm
-const commonjs = require('@rollup/plugin-commonjs');
-const { nodeResolve } = require('@rollup/plugin-node-resolve');
-
-const projectDir = path.join(__dirname, "../");
-
-async function removeDirIfExists(targetDir) {
-    try {
-        await fs.rmdir(targetDir, {recursive: true});
-    } catch (err) {
-        if (err.code !== "ENOENT") {
-            throw err;
-        }
-    }
-}
-
-/** function used to resolve common-js require calls below. */
-function packageIterator(request, start, defaultIterator) {
-    // this is just working for bs58, would need to tune it further for other dependencies
-    if (request === "safe-buffer") {
-        return [path.join(projectDir, "/scripts/package-overrides/safe-buffer")];
-    } else if (request === "buffer/") {
-        return [path.join(projectDir, "/scripts/package-overrides/buffer")];
-    } else {
-        return defaultIterator();
-    }
-}
-
-async function commonjsToESM(src, dst) {
-    // create js bundle
-    const bundle = await rollup({
-        input: src,
-        plugins: [commonjs(), nodeResolve({
-            browser: true,
-            preferBuiltins: false,
-            customResolveOptions: {packageIterator}
-        })]
-    });
-    const {output} = await bundle.generate({
-        format: 'es'
-    });
-    const code = output[0].code;
-    await fs.writeFile(dst, code, "utf8");
-}
-
-async function populateLib() {
-    const libDir = path.join(projectDir, "lib/");
-    await removeDirIfExists(libDir);
-    await fs.mkdir(libDir);
-    const olmSrcDir = path.dirname(require.resolve("olm"));
-    const olmDstDir = path.join(libDir, "olm/");
-    await fs.mkdir(olmDstDir);
-    for (const file of ["olm.js", "olm.wasm", "olm_legacy.js"]) {
-        await fs.symlink(path.join(olmSrcDir, file), path.join(olmDstDir, file));
-    }
-    // transpile another-json to esm
-    await fs.mkdir(path.join(libDir, "another-json/"));
-    await commonjsToESM(
-        require.resolve('another-json/another-json.js'),
-        path.join(libDir, "another-json/index.js")
-    );
-    // transpile bs58 to esm
-    await fs.mkdir(path.join(libDir, "bs58/"));
-    await commonjsToESM(
-        require.resolve('bs58/index.js'),
-        path.join(libDir, "bs58/index.js")
-    );
-    // transpile base64-arraybuffer to esm
-    await fs.mkdir(path.join(libDir, "base64-arraybuffer/"));
-    await commonjsToESM(
-        require.resolve('base64-arraybuffer/lib/base64-arraybuffer.js'),
-        path.join(libDir, "base64-arraybuffer/index.js")
-    );
-    // this probably should no go in here, we can just import "aes-js" from legacy-extras.js
-    // as that file is never loaded from a browser
-    
-    // transpile aesjs to esm
-    await fs.mkdir(path.join(libDir, "aes-js/"));
-    await commonjsToESM(
-        require.resolve('aes-js/index.js'),
-        path.join(libDir, "aes-js/index.js")
-    );
-    // es6-promise is already written as an es module,
-    // but it does need to be babelified, and current we don't babelify
-    // anything in node_modules in the build script, so make a bundle that
-    // is conveniently not placed in node_modules rather than symlinking.
-    await fs.mkdir(path.join(libDir, "es6-promise/"));
-    await commonjsToESM(
-        require.resolve('es6-promise/lib/es6-promise/promise.js'),
-        path.join(libDir, "es6-promise/index.js")
-    );
-}
-
-populateLib();

scripts/postcss/css-compile-variables.js

@@ -0,0 +1,180 @@
+/*
+Copyright 2021 The Matrix.org Foundation C.I.C.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+const valueParser = require("postcss-value-parser");
+
+/**
+ * This plugin derives new css variables from a given set of base variables.
+ * A derived css variable has the form --base--operation-argument; meaning that the derived
+ * variable has a value that is generated from the base variable "base" by applying "operation"
+ * with given "argument".
+ * 
+ * eg: given the base variable --foo-color: #40E0D0, --foo-color--darker-20 is a css variable
+ * derived from foo-color by making it 20% more darker.
+ * 
+ * All derived variables are added to the :root section.
+ * 
+ * The actual derivation is done outside the plugin in a callback.
+ */
+
+function getValueFromAlias(alias, {aliasMap, baseVariables, resolvedMap}) {
+    const derivedVariable = aliasMap.get(alias);
+    return baseVariables.get(derivedVariable) ?? resolvedMap.get(derivedVariable);
+}
+
+function parseDeclarationValue(value) {
+    const parsed = valueParser(value);
+    const variables = [];
+    parsed.walk(node => {
+        if (node.type !== "function") {
+            return;
+        }
+        switch (node.value) {
+            case "var": {
+                const variable = node.nodes[0];
+                variables.push(variable.value);
+                break;
+            }
+            case "url": {
+                const url = node.nodes[0].value;
+                // resolve url with some absolute url so that we get the query params without using regex
+                const params = new URL(url, "file://foo/bar/").searchParams;
+                const primary = params.get("primary");
+                const secondary = params.get("secondary");
+                if (primary) { variables.push(primary); }
+                if (secondary) { variables.push(secondary); }
+                break;
+            }
+        }
+    });
+    return variables;
+}
+
+function resolveDerivedVariable(decl, derive, maps, isDark) {
+    const { baseVariables, resolvedMap } = maps;
+    const RE_VARIABLE_VALUE = /(?:--)?((.+)--(.+)-(.+))/;
+    const variableCollection = parseDeclarationValue(decl.value);
+    for (const variable of variableCollection) {
+        const matches = variable.match(RE_VARIABLE_VALUE);
+        if (matches) {
+            const [, wholeVariable, baseVariable, operation, argument] = matches;
+            const value = baseVariables.get(baseVariable) ?? getValueFromAlias(baseVariable, maps);
+            if (!value) {
+                throw new Error(`Cannot derive from ${baseVariable} because it is neither defined in config nor is it an alias!`);
+            }
+            const derivedValue = derive(value, operation, argument, isDark);
+            resolvedMap.set(wholeVariable, derivedValue);
+        }
+    }
+}
+
+function extract(decl, {aliasMap, baseVariables}) {
+    if (decl.variable) {
+        // see if right side is of form "var(--foo)"
+        const wholeVariable = decl.value.match(/var\(--(.+)\)/)?.[1];
+        // remove -- from the prop
+        const prop = decl.prop.substring(2);
+        if (wholeVariable) {
+            aliasMap.set(prop, wholeVariable);
+            // Since this is an alias, we shouldn't store it in baseVariables
+            return;
+        }
+        baseVariables.set(prop, decl.value);
+    }
+}
+
+function addResolvedVariablesToRootSelector(root, {Rule, Declaration}, {resolvedMap}) {
+    const newRule = new Rule({ selector: ":root", source: root.source });
+    // Add derived css variables to :root
+    resolvedMap.forEach((value, key) => {
+        const declaration = new Declaration({prop: `--${key}`, value});
+        newRule.append(declaration);
+    });
+    root.append(newRule);
+}
+
+function populateMapWithDerivedVariables(map, cssFileLocation, {resolvedMap, aliasMap}) {
+    const location = cssFileLocation.match(/(.+)\/.+\.css/)?.[1];
+    const derivedVariables = [
+        ...([...resolvedMap.keys()].filter(v => !aliasMap.has(v))),
+        ...([...aliasMap.entries()].map(([alias, variable]) => `${alias}=${variable}`))
+    ];
+    const sharedObject = map.get(location);
+    const output = { "derived-variables": derivedVariables };
+    if (sharedObject) {
+        Object.assign(sharedObject, output);
+    }
+    else {
+        map.set(location, output);
+    }
+}
+
+/**
+ * @callback derive
+ * @param {string} value - The base value on which an operation is applied
+ * @param {string} operation - The operation to be applied (eg: darker, lighter...)
+ * @param {string} argument - The argument for this operation
+ * @param {boolean} isDark - Indicates whether this theme is dark
+ */
+/**
+ * 
+ * @param {Object} opts - Options for the plugin
+ * @param {derive} opts.derive - The callback which contains the logic for resolving derived variables
+ * @param {Map} opts.compiledVariables - A map that stores derived variables so that manifest source sections can be produced
+ */
+module.exports = (opts = {}) => {
+    const aliasMap = new Map();
+    const resolvedMap = new Map();
+    const baseVariables = new Map();
+    const maps = { aliasMap, resolvedMap, baseVariables };
+
+    return {
+        postcssPlugin: "postcss-compile-variables",
+
+        Once(root, {Rule, Declaration, result}) {
+            const cssFileLocation = root.source.input.from;
+            if (cssFileLocation.includes("type=runtime")) {
+                // If this is a runtime theme, don't derive variables.
+                return;
+            }
+            const isDark = cssFileLocation.includes("dark=true");
+            /*
+            Go through the CSS file once to extract all aliases and base variables.
+            We use these when resolving derived variables later.
+            */
+            root.walkDecls(decl => extract(decl, maps));
+            root.walkDecls(decl => resolveDerivedVariable(decl, opts.derive, maps, isDark));
+            addResolvedVariablesToRootSelector(root, {Rule, Declaration}, maps);
+            if (opts.compiledVariables){
+                populateMapWithDerivedVariables(opts.compiledVariables, cssFileLocation, maps);
+            }
+            // Also produce a mapping from alias to completely resolved color
+            const resolvedAliasMap = new Map();
+            aliasMap.forEach((value, key) => {
+                resolvedAliasMap.set(key, resolvedMap.get(value));
+            });
+            // Publish the base-variables, derived-variables and resolved aliases to the other postcss-plugins
+            const combinedMap = new Map([...baseVariables, ...resolvedMap, ...resolvedAliasMap]);
+            result.messages.push({
+                type: "resolved-variable-map",
+                plugin: "postcss-compile-variables",
+                colorMap: combinedMap,
+            });
+        },
+    };
+};
+
+module.exports.postcss = true;

scripts/postcss/css-url-processor.js

@@ -0,0 +1,92 @@
+/*
+Copyright 2021 The Matrix.org Foundation C.I.C.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+const valueParser = require("postcss-value-parser");
+const  resolve = require("path").resolve;
+
+function colorsFromURL(url, colorMap) {
+    const params = new URL(`file://${url}`).searchParams;
+    const primary = params.get("primary");
+    if (!primary) {
+        return null;
+    }
+    const secondary = params.get("secondary");
+    const primaryColor = colorMap.get(primary);
+    const secondaryColor = colorMap.get(secondary);
+    if (!primaryColor) {
+        throw new Error(`Variable ${primary} not found in resolved color variables!`);
+    }
+    if (secondary && !secondaryColor) {
+        throw new Error(`Variable ${secondary} not found in resolved color variables!`);
+    }
+    return [primaryColor, secondaryColor];
+}
+
+function processURL(decl, replacer, colorMap, cssPath) {
+    const value = decl.value;
+    const parsed = valueParser(value);
+    parsed.walk(node => {
+        if (node.type !== "function" || node.value !== "url") {
+            return;
+        }
+        const urlStringNode = node.nodes[0];
+        const oldURL = urlStringNode.value;
+        const oldURLAbsolute = resolve(cssPath, oldURL);
+        const colors  = colorsFromURL(oldURLAbsolute, colorMap);
+        if (!colors) {
+            // If no primary color is provided via url params, then this url need not be handled.
+            return;
+        }
+        const newURL = replacer(oldURLAbsolute.replace(/\?.+/, ""), ...colors);
+        if (!newURL) {
+            throw new Error("Replacer failed to produce a replacement URL!");
+        }
+        urlStringNode.value = newURL;
+    });
+    decl.assign({prop: decl.prop, value: parsed.toString()})
+}
+
+/* *
+ * @type {import('postcss').PluginCreator}
+ */
+module.exports = (opts = {}) => {
+    return {
+        postcssPlugin: "postcss-url-to-variable",
+
+        Once(root, {result}) {
+            const cssFileLocation = root.source.input.from;
+            if (cssFileLocation.includes("type=runtime")) {
+                // If this is a runtime theme, don't process urls.
+                return;
+            }
+            /*
+            postcss-compile-variables should have sent the list of resolved colours down via results
+            */
+            const {colorMap} = result.messages.find(m => m.type === "resolved-variable-map");
+            if (!colorMap) {
+                throw new Error("Postcss results do not contain resolved colors!");
+            }
+            /*
+            Go through each declaration and if it contains an URL, replace the url with the result
+            of running replacer(url)
+            */
+            const cssPath = root.source?.input.file.replace(/[^/]*$/, "");
+            root.walkDecls(decl => processURL(decl, opts.replacer, colorMap, cssPath));
+        },
+    };
+};
+
+module.exports.postcss = true;

scripts/postcss/css-url-to-variables.js

@@ -0,0 +1,97 @@
+/*
+Copyright 2021 The Matrix.org Foundation C.I.C.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+const valueParser = require("postcss-value-parser");
+
+/**
+ * This plugin extracts content inside url() into css variables and adds the variables to the root section.
+ * This plugin is used in conjunction with css-url-processor plugin to colorize svg icons.
+ */
+const idToPrepend = "icon-url";
+
+function findAndReplaceUrl(decl, urlVariables, counter) {
+    const value = decl.value;
+    const parsed = valueParser(value);
+    parsed.walk(node => {
+        if (node.type !== "function" || node.value !== "url") {
+            return;
+        }
+        const url = node.nodes[0].value;
+        if (!url.match(/\.svg\?primary=.+/)) {
+            return;
+        }
+        const count = counter.next().value;
+        const variableName = `${idToPrepend}-${count}`;
+        urlVariables.set(variableName, url);
+        node.value = "var";
+        node.nodes = [{ type: "word", value: `--${variableName}` }];
+    });
+    decl.assign({prop: decl.prop, value: parsed.toString()})
+}
+
+function addResolvedVariablesToRootSelector(root, { Rule, Declaration }, urlVariables) {
+    const newRule = new Rule({ selector: ":root", source: root.source });
+    // Add derived css variables to :root
+    urlVariables.forEach((value, key) => {
+        const declaration = new Declaration({ prop: `--${key}`, value: `url("${value}")`});
+        newRule.append(declaration);
+    });
+    root.append(newRule);
+}
+
+function populateMapWithIcons(map, cssFileLocation, urlVariables) {
+    const location = cssFileLocation.match(/(.+)\/.+\.css/)?.[1];
+    const sharedObject = map.get(location);
+    const output = {"icon": Object.fromEntries(urlVariables)};
+    if (sharedObject) {
+        Object.assign(sharedObject, output);
+    }
+    else {
+        map.set(location, output);
+    }
+}
+
+function *createCounter() {
+    for (let i = 0; ; ++i) {
+        yield i;
+    }
+}
+
+/* *
+ * @type {import('postcss').PluginCreator}
+ */
+module.exports = (opts = {}) => {
+    return {
+        postcssPlugin: "postcss-url-to-variable",
+
+        Once(root, { Rule, Declaration }) {
+            const urlVariables = new Map();
+            const counter = createCounter();
+            root.walkDecls(decl => findAndReplaceUrl(decl, urlVariables, counter));
+            const cssFileLocation = root.source.input.from;
+            if (urlVariables.size && !cssFileLocation.includes("type=runtime")) {
+                addResolvedVariablesToRootSelector(root, { Rule, Declaration }, urlVariables);
+            }
+            if (opts.compiledVariables){
+                const cssFileLocation = root.source.input.from;
+                populateMapWithIcons(opts.compiledVariables, cssFileLocation, urlVariables);
+            }
+        },
+    };
+};
+
+module.exports.postcss = true;
+

scripts/postcss/svg-builder.mjs

@@ -0,0 +1,51 @@
+/*
+Copyright 2021 The Matrix.org Foundation C.I.C.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+import {readFileSync, mkdirSync, writeFileSync} from "fs";
+import {resolve} from "path";
+import {h32} from "xxhashjs";
+import {getColoredSvgString} from "../../src/platform/web/theming/shared/svg-colorizer.mjs";
+
+function createHash(content) {
+    const hasher = new h32(0);
+    hasher.update(content);
+    return hasher.digest();
+}
+
+/**
+ * Builds a new svg with the colors replaced and returns its location.
+ * @param {string} svgLocation The location of the input svg file
+ * @param {string} primaryColor Primary color for the new svg
+ * @param {string} secondaryColor Secondary color for the new svg
+ */
+export function buildColorizedSVG(svgLocation, primaryColor, secondaryColor) {
+    const svgCode = readFileSync(svgLocation, { encoding: "utf8"});
+    const coloredSVGCode = getColoredSvgString(svgCode, primaryColor, secondaryColor);
+    const fileName = svgLocation.match(/.+[/\\](.+\.svg)/)[1];
+    const outputName = `${fileName.substring(0, fileName.length - 4)}-${createHash(coloredSVGCode)}.svg`;
+    const outputPath = resolve(__dirname, "./.tmp");
+    try {
+       mkdirSync(outputPath);
+    }
+    catch (e) {
+        if (e.code !== "EEXIST") {
+            throw e;
+        }
+    }
+    const outputFile = `${outputPath}/${outputName}`;
+    writeFileSync(outputFile, coloredSVGCode);
+    return outputFile;
+}

scripts/postcss/tests/common.js

@@ -0,0 +1,30 @@
+/*
+Copyright 2021 The Matrix.org Foundation C.I.C.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+const postcss = require("postcss");
+
+module.exports.createTestRunner = function (plugin) {
+    return async function run(input, output, opts = {}, assert) {
+        let result = await postcss([plugin(opts)]).process(input, { from: undefined, });
+        assert.strictEqual(
+            result.css.replaceAll(/\s/g, ""),
+            output.replaceAll(/\s/g, "")
+        );
+        assert.strictEqual(result.warnings().length, 0);
+    };
+}
+
+

scripts/postcss/tests/css-compile-variables.test.js

@@ -0,0 +1,156 @@
+/*
+Copyright 2021 The Matrix.org Foundation C.I.C.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+const offColor = require("off-color").offColor;
+const postcss = require("postcss");
+const plugin = require("../css-compile-variables");
+const derive = require("../color").derive;
+const run = require("./common").createTestRunner(plugin);
+
+module.exports.tests = function tests() {
+    return {
+        "derived variables are resolved": async (assert) => {
+            const inputCSS = `
+            :root {
+                --foo-color: #ff0;
+            }
+            div {
+                background-color: var(--foo-color--lighter-50);
+            }`;
+            const transformedColor = offColor("#ff0").lighten(0.5);
+            const outputCSS =
+                inputCSS +
+                `
+            :root {
+                --foo-color--lighter-50: ${transformedColor.hex()};
+            }
+            `;
+            await run( inputCSS, outputCSS, {derive}, assert);
+        },
+
+        "derived variables work with alias": async (assert) => {
+            const inputCSS = `
+            :root {
+                --icon-color: #fff;
+            }
+            div {
+                background: var(--icon-color--darker-20);
+                --my-alias: var(--icon-color--darker-20);
+                color: var(--my-alias--lighter-15);
+            }`;
+            const colorDarker = offColor("#fff").darken(0.2).hex();
+            const aliasLighter = offColor(colorDarker).lighten(0.15).hex();
+            const outputCSS = inputCSS + `:root {
+                --icon-color--darker-20: ${colorDarker};
+                --my-alias--lighter-15: ${aliasLighter};
+            }
+            `;
+            await run(inputCSS, outputCSS, {derive}, assert);
+        },
+
+        "derived variable throws if base not present in config": async (assert) => {
+            const css = `:root {
+                color: var(--icon-color--darker-20);
+            }`;
+            assert.rejects(async () => await postcss([plugin({ variables: {} })]).process(css, { from: undefined, }));
+        },
+
+        "multiple derived variable in single declaration is parsed correctly": async (assert) => {
+            const inputCSS = `
+            :root {
+                --foo-color: #ff0;
+            }
+            div {
+                background-color: linear-gradient(var(--foo-color--lighter-50), var(--foo-color--darker-20));
+            }`;
+            const transformedColor1 = offColor("#ff0").lighten(0.5);
+            const transformedColor2 = offColor("#ff0").darken(0.2);
+            const outputCSS =
+                inputCSS +
+                `
+            :root {
+                --foo-color--lighter-50: ${transformedColor1.hex()};
+                --foo-color--darker-20: ${transformedColor2.hex()};
+            }
+            `;
+            await run( inputCSS, outputCSS, {derive}, assert);
+        },
+
+        "multiple aliased-derived variable in single declaration is parsed correctly": async (assert) => {
+            const inputCSS = `
+            :root {
+                --foo-color: #ff0;
+            }
+            div {
+                --my-alias: var(--foo-color);
+                background-color: linear-gradient(var(--my-alias--lighter-50), var(--my-alias--darker-20));
+            }`;
+            const transformedColor1 = offColor("#ff0").lighten(0.5);
+            const transformedColor2 = offColor("#ff0").darken(0.2);
+            const outputCSS =
+                inputCSS +
+                `
+            :root {
+                --my-alias--lighter-50: ${transformedColor1.hex()};
+                --my-alias--darker-20: ${transformedColor2.hex()};
+            }
+            `;
+            await run( inputCSS, outputCSS, {derive}, assert);
+        },
+
+        "compiledVariables map is populated": async (assert) => {
+            const compiledVariables = new Map();
+            const inputCSS = `
+            :root {
+                --icon-color: #fff;
+            }
+            div {
+                background: var(--icon-color--darker-20);
+                --my-alias: var(--icon-color--darker-20);
+                color: var(--my-alias--lighter-15);
+            }`;
+            await postcss([plugin({ derive, compiledVariables })]).process(inputCSS, { from: "/foo/bar/test.css", });
+            const actualArray = compiledVariables.get("/foo/bar")["derived-variables"];
+            const expectedArray = ["icon-color--darker-20", "my-alias=icon-color--darker-20", "my-alias--lighter-15"];
+            assert.deepStrictEqual(actualArray.sort(), expectedArray.sort());
+        },
+
+        "derived variable are supported in urls": async (assert) => {
+            const inputCSS = `
+            :root {
+                --foo-color: #ff0;
+            }
+            div {
+                background-color: var(--foo-color--lighter-50);
+                background: url("./foo/bar/icon.svg?primary=foo-color--darker-5");
+            }
+            a {
+                background: url("foo/bar/icon.svg");
+            }`;
+            const transformedColorLighter = offColor("#ff0").lighten(0.5);
+            const transformedColorDarker = offColor("#ff0").darken(0.05);
+            const outputCSS =
+                inputCSS +
+                `
+            :root {
+                --foo-color--lighter-50: ${transformedColorLighter.hex()};
+                --foo-color--darker-5: ${transformedColorDarker.hex()};
+            }
+            `;
+            await run( inputCSS, outputCSS, {derive}, assert);
+        }
+    };
+};

scripts/postcss/tests/css-url-to-variables.test.js

@@ -0,0 +1,71 @@
+/*
+Copyright 2021 The Matrix.org Foundation C.I.C.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+const plugin = require("../css-url-to-variables");
+const run = require("./common").createTestRunner(plugin);
+const postcss = require("postcss");
+
+module.exports.tests = function tests() {
+    return {
+        "url is replaced with variable": async (assert) => {
+            const inputCSS = `div {
+                background: no-repeat center/80% url("../img/image.svg?primary=main-color--darker-20");
+            }
+            button {
+                background: url("/home/foo/bar/cool.svg?primary=blue&secondary=green");
+            }`;
+            const outputCSS =
+            `div {
+                background: no-repeat center/80% var(--icon-url-0);
+            }
+            button {
+                background: var(--icon-url-1);
+            }`+
+                `
+            :root {
+                --icon-url-0: url("../img/image.svg?primary=main-color--darker-20");
+                --icon-url-1: url("/home/foo/bar/cool.svg?primary=blue&secondary=green");
+            }
+            `;
+            await run(inputCSS, outputCSS, { }, assert);
+        },
+        "non svg urls without query params are not replaced": async (assert) => {
+            const inputCSS = `div {
+                background: no-repeat url("./img/foo/bar/image.png");
+            }`;
+            await run(inputCSS, inputCSS, {}, assert);
+        },
+        "map is populated with icons": async (assert) => {
+            const compiledVariables = new Map();
+            compiledVariables.set("/foo/bar", { "derived-variables": ["background-color--darker-20", "accent-color--lighter-15"] });
+            const inputCSS = `div {
+                background: no-repeat center/80% url("../img/image.svg?primary=main-color--darker-20");
+            }
+            button {
+                background: url("/home/foo/bar/cool.svg?primary=blue&secondary=green");
+            }`;
+            const expectedObject = {
+                "icon-url-0": "../img/image.svg?primary=main-color--darker-20",
+                "icon-url-1": "/home/foo/bar/cool.svg?primary=blue&secondary=green",
+            };
+            await postcss([plugin({compiledVariables})]).process(inputCSS, { from: "/foo/bar/test.css", });
+            const sharedVariable = compiledVariables.get("/foo/bar");
+            assert.deepEqual(["background-color--darker-20", "accent-color--lighter-15"], sharedVariable["derived-variables"]);
+            assert.deepEqual(expectedObject, sharedVariable["icon"]);
+        }
+    };
+};
+

scripts/release.sh

@@ -1,3 +1,4 @@
+set -e
 if [ -z "$1" ]; then
     echo "provide a new version, current version is $(jq '.version' package.json)"
     exit 1

scripts/sdk/base-manifest.json

@@ -0,0 +1,19 @@
+{
+    "name": "hydrogen-view-sdk",
+    "description": "Embeddable matrix client library, including view components",
+    "version": "0.1.0",
+    "main": "./lib-build/hydrogen.cjs.js",
+    "exports": {
+        ".": {
+            "import": "./lib-build/hydrogen.es.js",
+            "require": "./lib-build/hydrogen.cjs.js"
+        },
+        "./paths/vite": "./paths/vite.js",
+        "./style.css": "./asset-build/assets/theme-element-light.css",
+        "./theme-element-light.css": "./asset-build/assets/theme-element-light.css",
+        "./theme-element-dark.css": "./asset-build/assets/theme-element-dark.css",
+        "./main.js": "./asset-build/assets/main.js",
+        "./download-sandbox.html": "./asset-build/assets/download-sandbox.html",
+        "./assets/*": "./asset-build/assets/*"
+    }
+}

scripts/sdk/build.sh

@@ -0,0 +1,25 @@
+#!/bin/bash
+# Exit whenever one of the commands fail with a non-zero exit code
+set -e
+set -o pipefail
+# Enable extended globs so we can use the `!(filename)` glob syntax
+shopt -s extglob
+
+# Only remove the directory contents instead of the whole directory to maintain
+# the `npm link`/`yarn link` symlink
+rm -rf target/*
+yarn run vite build -c vite.sdk-assets-config.js
+yarn run vite build -c vite.sdk-lib-config.js
+yarn tsc -p tsconfig-declaration.json
+./scripts/sdk/create-manifest.js ./target/package.json
+mkdir target/paths
+# this doesn't work, the ?url imports need to be in the consuming project, so disable for now
+# ./scripts/sdk/transform-paths.js ./src/platform/web/sdk/paths/vite.js ./target/paths/vite.js
+cp doc/SDK.md target/README.md
+pushd target/asset-build
+rm index.html
+popd
+pushd target/asset-build/assets
+# Remove all `*.wasm` and `*.js` files except for `main.js`
+rm !(main).js *.wasm
+popd

scripts/sdk/create-manifest.js

@@ -0,0 +1,23 @@
+#!/usr/bin/env node
+const fs = require("fs");
+const appManifest = require("../../package.json");
+const baseSDKManifest = require("./base-manifest.json");
+/*
+    Need to leave typescript type definitions out until the
+    typescript conversion is complete and all imports in the d.ts files
+    exists.
+    ```
+    "types": "types/lib.d.ts"
+    ```
+*/
+const mergeOptions = require('merge-options');
+
+const manifestExtension = {
+    devDependencies: undefined,
+    scripts: undefined,
+};
+
+const manifest = mergeOptions(appManifest, baseSDKManifest, manifestExtension);
+const json = JSON.stringify(manifest, undefined, 2);
+const outFile = process.argv[2];
+fs.writeFileSync(outFile, json, {encoding: "utf8"});

scripts/sdk/test/.gitignore

@@ -0,0 +1,3 @@
+node_modules
+dist
+yarn.lock

scripts/sdk/test/deps.d.ts

@@ -0,0 +1,2 @@
+// Keep TypeScripts from complaining about hydrogen-view-sdk not having types yet
+declare module "hydrogen-view-sdk";

scripts/sdk/test/esm-entry.ts

@@ -0,0 +1,21 @@
+import * as hydrogenViewSdk from "hydrogen-view-sdk";
+import downloadSandboxPath from 'hydrogen-view-sdk/download-sandbox.html?url';
+import workerPath from 'hydrogen-view-sdk/main.js?url';
+import olmWasmPath from '@matrix-org/olm/olm.wasm?url';
+import olmJsPath from '@matrix-org/olm/olm.js?url';
+import olmLegacyJsPath from '@matrix-org/olm/olm_legacy.js?url';
+const assetPaths = {
+  downloadSandbox: downloadSandboxPath,
+  worker: workerPath,
+  olm: {
+      wasm: olmWasmPath,
+      legacyBundle: olmLegacyJsPath,
+      wasmBundle: olmJsPath
+  }
+};
+import "hydrogen-view-sdk/assets/theme-element-light.css";
+
+console.log('hydrogenViewSdk', hydrogenViewSdk);
+console.log('assetPaths', assetPaths);
+
+console.log('Entry ESM works ✅');

scripts/sdk/test/index.html

@@ -0,0 +1,12 @@
+<!DOCTYPE html>
+<html lang="en">
+  <head>
+    <meta charset="UTF-8" />
+    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
+    <title>Vite App</title>
+  </head>
+  <body>
+    <div id="app" class="hydrogen"></div>
+    <script type="module" src="./esm-entry.ts"></script>
+  </body>
+</html>

scripts/sdk/test/package.json

@@ -0,0 +1,8 @@
+{
+  "name": "test-sdk",
+  "version": "0.0.0",
+  "description": "",
+  "dependencies": {
+    "hydrogen-view-sdk": "link:../../../target"
+  }
+}

scripts/sdk/test/test-sdk-in-commonjs-env.js

@@ -0,0 +1,13 @@
+// Make sure the SDK can be used in a CommonJS environment.
+// Usage: node scripts/sdk/test/test-sdk-in-commonjs-env.js
+const hydrogenViewSdk = require('hydrogen-view-sdk');
+
+// Test that the "exports" are available:
+// Worker
+require.resolve('hydrogen-view-sdk/main.js');
+// Styles
+require.resolve('hydrogen-view-sdk/assets/theme-element-light.css');
+// Can access files in the assets/* directory
+require.resolve('hydrogen-view-sdk/assets/main.js');
+
+console.log('SDK works in CommonJS ✅');

scripts/sdk/test/test-sdk-in-esm-vite-build-env.js

@@ -0,0 +1,19 @@
+const { resolve } = require('path');
+const { build } = require('vite');
+
+async function main() {
+  await build({
+    outDir: './dist',
+    build: {
+      rollupOptions: {
+        input: {
+          main: resolve(__dirname, 'index.html')
+        }
+      }
+    }
+  });
+
+  console.log('SDK works in Vite build ✅');
+}
+
+main();

scripts/sdk/transform-paths.js

@@ -0,0 +1,36 @@
+#!/usr/bin/env node
+
+/**
+This script transforms the string literals in the sdk path files to adjust paths
+from what they are at development time to what they will be in the sdk package.
+
+It does this by looking in all string literals in the paths file and looking for file names
+that we expect and need replacing (as they are bundled with the sdk).
+ 
+Usage: ./transform-paths.js <input file> <output file>
+*/
+
+const acorn = require("acorn");
+const walk = require("acorn-walk")
+const escodegen = require("escodegen");
+const fs = require("fs");
+
+const code = fs.readFileSync(process.argv[2], {encoding: "utf8"});
+const ast = acorn.parse(code, {ecmaVersion: "13", sourceType: "module"});
+
+function changePrefix(value, file, newPrefix = "") {
+    const idx = value.indexOf(file);
+    if (idx !== -1) {
+        return newPrefix + value.substr(idx);
+    }
+    return value;
+}
+
+walk.simple(ast, {
+    Literal(node) {
+        node.value = changePrefix(node.value, "download-sandbox.html", "../");
+        node.value = changePrefix(node.value, "main.js", "../");
+    }
+});
+const transformedCode = escodegen.generate(ast);
+fs.writeFileSync(process.argv[3], transformedCode, {encoding: "utf8"})

scripts/serve-local.js

@@ -1,43 +0,0 @@
-/*
-Copyright 2020 Bruno Windels <bruno@windels.cloud>
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-    http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
-*/
-
-const finalhandler = require('finalhandler')
-const http = require('http')
-const serveStatic = require('serve-static')
-const path = require('path');
-
-// Serve up parent directory with cache disabled
-const serve = serveStatic(
-	path.resolve(__dirname, "../"),
-	{
-		etag: false,
-		setHeaders: res => {
-			res.setHeader("Pragma", "no-cache");
-			res.setHeader("Cache-Control", "no-cache, no-store, must-revalidate");
-			res.setHeader("Expires", "Wed, 21 Oct 2015 07:28:00 GMT");
-		},
-		index: ['index.html', 'index.htm']
-	}
-);
- 
-// Create server
-const server = http.createServer(function onRequest (req, res) {
-    console.log(req.method, req.url);
-	serve(req, res, finalhandler(req, res))
-});
-
-// Listen
-server.listen(3000);

scripts/test-derived-theme/test-theme.sh

@@ -0,0 +1,5 @@
+#!/bin/sh
+cp scripts/test-derived-theme/theme.json target/assets/theme-customer.json
+cat target/config.json | jq '.themeManifests += ["assets/theme-customer.json"]' | cat > target/config.temp.json
+rm target/config.json
+mv target/config.temp.json target/config.json

scripts/test-derived-theme/theme.json

@@ -0,0 +1,51 @@
+{
+	"name": "Customer",
+    "extends": "element",
+    "id": "customer",
+	"values": {
+        "variants": {
+            "dark": {
+                "dark": true,
+                "default": true,
+                "name": "Dark",
+                "variables": {
+                    "background-color-primary": "#21262b",
+                    "background-color-secondary": "#2D3239",
+                    "text-color": "#fff",
+                    "accent-color": "#F03F5B",
+                    "error-color": "#FF4B55",
+                    "fixed-white": "#fff",
+                    "room-badge": "#61708b",
+                    "link-color": "#238cf5"
+                }
+            },
+            "light": {
+                "default": true,
+                "name": "Dark",
+                "variables": {
+                    "background-color-primary": "#21262b",
+                    "background-color-secondary": "#2D3239",
+                    "text-color": "#fff",
+                    "accent-color": "#F03F5B",
+                    "error-color": "#FF4B55",
+                    "fixed-white": "#fff",
+                    "room-badge": "#61708b",
+                    "link-color": "#238cf5"
+                }
+            },
+            "red": {
+                "name": "Gruvbox",
+                "variables": {
+                    "background-color-primary": "#282828",
+                    "background-color-secondary": "#3c3836",
+                    "text-color": "#fbf1c7",
+                    "accent-color": "#8ec07c",
+                    "error-color": "#fb4934",
+                    "fixed-white": "#fff",
+                    "room-badge": "#cc241d",
+                    "link-color": "#fe8019"
+                }
+            }
+        }
+    }
+}

src/domain/AccountSetupViewModel.js

@@ -0,0 +1,136 @@
+/*
+Copyright 2021 The Matrix.org Foundation C.I.C.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+import {ViewModel} from "./ViewModel";
+import {KeyType} from "../matrix/ssss/index";
+import {Status} from "./session/settings/KeyBackupViewModel.js";
+
+export class AccountSetupViewModel extends ViewModel {
+    constructor(options) {
+        super(options);
+        this._accountSetup = options.accountSetup;
+        this._dehydratedDevice = undefined;
+        this._decryptDehydratedDeviceViewModel = undefined;
+        if (this._accountSetup.encryptedDehydratedDevice) {
+            this._decryptDehydratedDeviceViewModel = new DecryptDehydratedDeviceViewModel(this, dehydratedDevice => {
+                this._dehydratedDevice = dehydratedDevice;
+                this._decryptDehydratedDeviceViewModel = undefined;
+                this.emitChange("deviceDecrypted");
+            });
+        }
+    }
+
+    get decryptDehydratedDeviceViewModel() {
+        return this._decryptDehydratedDeviceViewModel;
+    }
+
+    get deviceDecrypted() {
+        return !!this._dehydratedDevice;
+    }
+
+    get dehydratedDeviceId() {
+        return this._accountSetup.encryptedDehydratedDevice.deviceId;
+    }
+
+    finish() {
+        this._accountSetup.finish(this._dehydratedDevice);
+    }
+}
+
+// this vm adopts the same shape as KeyBackupViewModel so the same view can be reused.
+class DecryptDehydratedDeviceViewModel extends ViewModel {
+    constructor(accountSetupViewModel, decryptedCallback) {
+        super(accountSetupViewModel.options);
+        this._accountSetupViewModel = accountSetupViewModel;
+        this._isBusy = false;
+        this._status = Status.SetupKey;
+        this._error = undefined;
+        this._decryptedCallback = decryptedCallback;
+    }
+
+    get decryptAction() {
+        return this.i18n`Restore`;
+    }
+
+    get purpose() {
+        return this.i18n`claim your dehydrated device`;
+    }
+
+    get offerDehydratedDeviceSetup() {
+        return false;
+    }
+
+    get dehydratedDeviceId() {
+        return this._accountSetupViewModel._dehydratedDevice?.deviceId;
+    }
+    
+    get isBusy() {
+        return this._isBusy;
+    }
+
+    get backupVersion() { return 0; }
+
+    get status() {
+        return this._status;
+    }
+
+    get error() {
+        return this._error?.message;
+    }
+
+    showPhraseSetup() {
+        if (this._status === Status.SetupKey) {
+            this._status = Status.SetupPhrase;
+            this.emitChange("status");
+        }
+    }
+
+    showKeySetup() {
+        if (this._status === Status.SetupPhrase) {
+            this._status = Status.SetupKey;
+            this.emitChange("status");
+        }
+    }
+
+    async _enterCredentials(keyType, credential) {
+        if (credential) {
+            try {
+                this._isBusy = true;
+                this.emitChange("isBusy");
+                const {encryptedDehydratedDevice} = this._accountSetupViewModel._accountSetup;
+                const dehydratedDevice = await encryptedDehydratedDevice.decrypt(keyType, credential);
+                this._decryptedCallback(dehydratedDevice);
+            } catch (err) {
+                console.error(err);
+                this._error = err;
+                this.emitChange("error");
+            } finally {
+                this._isBusy = false;
+                this.emitChange("");
+            }
+        }
+    }
+
+    enterSecurityPhrase(passphrase) {
+        this._enterCredentials(KeyType.Passphrase, passphrase);
+    }
+
+    enterSecurityKey(securityKey) {
+        this._enterCredentials(KeyType.RecoveryKey, securityKey);
+    }
+
+    disable() {}
+}

src/domain/LoginViewModel.js

@@ -1,84 +0,0 @@
-/*
-Copyright 2020 Bruno Windels <bruno@windels.cloud>
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-    http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
-*/
-
-import {ViewModel} from "./ViewModel.js";
-import {SessionLoadViewModel} from "./SessionLoadViewModel.js";
-
-export class LoginViewModel extends ViewModel {
-    constructor(options) {
-        super(options);
-        const {ready, defaultHomeServer, createSessionContainer} = options;
-        this._createSessionContainer = createSessionContainer;
-        this._ready = ready;
-        this._defaultHomeServer = defaultHomeServer;
-        this._sessionContainer = null;
-        this._loadViewModel = null;
-        this._loadViewModelSubscription = null;
-    }
-
-    get defaultHomeServer() { return this._defaultHomeServer; }
-
-    get loadViewModel() {return this._loadViewModel; }
-
-    get isBusy() {
-        if (!this._loadViewModel) {
-            return false;
-        } else {
-            return this._loadViewModel.loading;
-        }
-    }
-
-    async login(username, password, homeserver) {
-        this._loadViewModelSubscription = this.disposeTracked(this._loadViewModelSubscription);
-        if (this._loadViewModel) {
-            this._loadViewModel = this.disposeTracked(this._loadViewModel);
-        }
-        this._loadViewModel = this.track(new SessionLoadViewModel({
-            createAndStartSessionContainer: () => {
-                this._sessionContainer = this._createSessionContainer();
-                this._sessionContainer.startWithLogin(homeserver, username, password);
-                return this._sessionContainer;
-            },
-            ready: sessionContainer => {
-                // make sure we don't delete the session in dispose when navigating away
-                this._sessionContainer = null;
-                this._ready(sessionContainer);
-            },
-            homeserver,
-        }));
-        this._loadViewModel.start();
-        this.emitChange("loadViewModel");
-        this._loadViewModelSubscription = this.track(this._loadViewModel.disposableOn("change", () => {
-            if (!this._loadViewModel.loading) {
-                this._loadViewModelSubscription = this.disposeTracked(this._loadViewModelSubscription);
-            }
-            this.emitChange("isBusy");
-        }));
-    }
-
-    get cancelUrl() {
-        return this.urlCreator.urlForSegment("session");
-    }
-
-    dispose() {
-        super.dispose();
-        if (this._sessionContainer) {
-            // if we move away before we're done with initial sync
-            // delete the session
-            this._sessionContainer.deleteSession();
-        }
-    }
-}

src/domain/LogoutViewModel.ts

@@ -0,0 +1,71 @@
+/*
+Copyright 2021 The Matrix.org Foundation C.I.C.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+import {Options as BaseOptions, ViewModel} from "./ViewModel";
+import {Client} from "../matrix/Client.js";
+import {SegmentType} from "./navigation/index";
+
+type Options = { sessionId: string; } & BaseOptions;
+
+export class LogoutViewModel extends ViewModel<SegmentType, Options> {
+    private _sessionId: string;
+    private _busy: boolean;
+    private _showConfirm: boolean;
+    private _error?: Error;
+
+    constructor(options: Options) {
+        super(options);
+        this._sessionId = options.sessionId;
+        this._busy = false;
+        this._showConfirm = true;
+        this._error = undefined;
+    }
+
+    get showConfirm(): boolean {
+        return this._showConfirm;
+    }
+
+    get busy(): boolean {
+        return this._busy;
+    }
+
+    get cancelUrl(): string | undefined {
+        return this.urlCreator.urlForSegment("session", true);
+    }
+
+    async logout(): Promise<void> {
+        this._busy = true;
+        this._showConfirm = false;
+        this.emitChange("busy");
+        try {
+            const client = new Client(this.platform);
+            await client.startLogout(this._sessionId);
+            this.navigation.push("session", true);
+        } catch (err) {
+            this._error = err;
+            this._busy = false;
+            this.emitChange("busy");
+        }
+    }
+
+    get status(): string {
+        if (this._error) {
+            return this.i18n`Could not log out of device: ${this._error.message}`;
+        } else {
+            return this.i18n`Logging out… Please don't close the app.`;
+        }
+    }
+}

src/domain/RootViewModel.js

@@ -14,62 +14,75 @@ See the License for the specific language governing permissions and
 limitations under the License.
 */
 
+import {Client} from "../matrix/Client.js";
 import {SessionViewModel} from "./session/SessionViewModel.js";
 import {SessionLoadViewModel} from "./SessionLoadViewModel.js";
-import {LoginViewModel} from "./LoginViewModel.js";
+import {LoginViewModel} from "./login/LoginViewModel";
+import {LogoutViewModel} from "./LogoutViewModel";
 import {SessionPickerViewModel} from "./SessionPickerViewModel.js";
-import {ViewModel} from "./ViewModel.js";
+import {ViewModel} from "./ViewModel";
 
 export class RootViewModel extends ViewModel {
     constructor(options) {
         super(options);
-        this._createSessionContainer = options.createSessionContainer;
         this._error = null;
         this._sessionPickerViewModel = null;
         this._sessionLoadViewModel = null;
         this._loginViewModel = null;
+        this._logoutViewModel = null;
         this._sessionViewModel = null;
-        this._pendingSessionContainer = null;
+        this._pendingClient = null;
     }
 
     async load() {
         this.track(this.navigation.observe("login").subscribe(() => this._applyNavigation()));
         this.track(this.navigation.observe("session").subscribe(() => this._applyNavigation()));
-        this._applyNavigation(this.urlCreator.getLastUrl());
+        this.track(this.navigation.observe("sso").subscribe(() => this._applyNavigation()));
+        this._applyNavigation(true);
     }
 
-    async _applyNavigation(restoreUrlIfAtDefault) {
-        const isLogin = this.navigation.observe("login").get();
-        const sessionId = this.navigation.observe("session").get();
+    async _applyNavigation(shouldRestoreLastUrl) {
+        const isLogin = this.navigation.path.get("login");
+        const logoutSessionId = this.navigation.path.get("logout")?.value;
+        const sessionId = this.navigation.path.get("session")?.value;
+        const loginToken = this.navigation.path.get("sso")?.value;
         if (isLogin) {
             if (this.activeSection !== "login") {
                 this._showLogin();
             }
+        } else if (logoutSessionId) {
+            if (this.activeSection !== "logout") {
+                this._showLogout(logoutSessionId);
+            }
         } else if (sessionId === true) {
             if (this.activeSection !== "picker") {
                 this._showPicker();
             }
         } else if (sessionId) {
             if (!this._sessionViewModel || this._sessionViewModel.id !== sessionId) {
-                // see _showLogin for where _pendingSessionContainer comes from
-                if (this._pendingSessionContainer && this._pendingSessionContainer.sessionId === sessionId) {
-                    const sessionContainer = this._pendingSessionContainer;
-                    this._pendingSessionContainer = null;
-                    this._showSession(sessionContainer);
+                // see _showLogin for where _pendingClient comes from
+                if (this._pendingClient && this._pendingClient.sessionId === sessionId) {
+                    const client = this._pendingClient;
+                    this._pendingClient = null;
+                    this._showSession(client);
                 } else {
                     // this should never happen, but we want to be sure not to leak it
-                    if (this._pendingSessionContainer) {
-                        this._pendingSessionContainer.dispose();
-                        this._pendingSessionContainer = null;
+                    if (this._pendingClient) {
+                        this._pendingClient.dispose();
+                        this._pendingClient = null;
                     }
                     this._showSessionLoader(sessionId);
                 }
             }
-        } else {
+        } else if (loginToken) {
+            this.urlCreator.normalizeUrl();
+            if (this.activeSection !== "login") {
+                this._showLogin(loginToken);
+            }
+        }
+        else {
             try {
-                if (restoreUrlIfAtDefault) {
-                    this.urlCreator.pushUrl(restoreUrlIfAtDefault);
-                } else {
+                if (!(shouldRestoreLastUrl && this.urlCreator.tryRestoreLastUrl())) {
                     const sessionInfos = await this.platform.sessionInfoStorage.getAll();
                     if (sessionInfos.length === 0) {
                         this.navigation.push("login");
@@ -96,12 +109,11 @@ export class RootViewModel extends ViewModel {
         }
     }
 
-    _showLogin() {
+    _showLogin(loginToken) {
         this._setSection(() => {
             this._loginViewModel = new LoginViewModel(this.childOptions({
-                defaultHomeServer: this.platform.config["defaultHomeServer"],
-                createSessionContainer: this._createSessionContainer,
-                ready: sessionContainer => {
+                defaultHomeserver: this.platform.config["defaultHomeServer"],
+                ready: client => {
                     // we don't want to load the session container again,
                     // but we also want the change of screen to go through the navigation
                     // so we store the session container in a temporary variable that will be
@@ -110,30 +122,35 @@ export class RootViewModel extends ViewModel {
                     // Also, we should not call _setSection before the navigation is in the correct state,
                     // as url creation (e.g. in RoomTileViewModel)
                     // won't be using the correct navigation base path.
-                    this._pendingSessionContainer = sessionContainer;
-                    this.navigation.push("session", sessionContainer.sessionId);
+                    this._pendingClient = client;
+                    this.navigation.push("session", client.sessionId);
                 },
+                loginToken
             }));
         });
     }
 
-    _showSession(sessionContainer) {
+    _showLogout(sessionId) {
         this._setSection(() => {
-            this._sessionViewModel = new SessionViewModel(this.childOptions({sessionContainer}));
+            this._logoutViewModel = new LogoutViewModel(this.childOptions({sessionId}));
+        });
+    }
+
+    _showSession(client) {
+        this._setSection(() => {
+            this._sessionViewModel = new SessionViewModel(this.childOptions({client}));
             this._sessionViewModel.start();
         });
     }
 
     _showSessionLoader(sessionId) {
+        const client = new Client(this.platform);
+        client.startWithExistingSession(sessionId);
         this._setSection(() => {
-            this._sessionLoadViewModel = new SessionLoadViewModel({
-                createAndStartSessionContainer: () => {
-                    const sessionContainer = this._createSessionContainer();
-                    sessionContainer.startWithExistingSession(sessionId);
-                    return sessionContainer;
-                },
-                ready: sessionContainer => this._showSession(sessionContainer)
-            });
+            this._sessionLoadViewModel = new SessionLoadViewModel(this.childOptions({
+                client,
+                ready: client => this._showSession(client)
+            }));
             this._sessionLoadViewModel.start();
         });
     }
@@ -145,6 +162,8 @@ export class RootViewModel extends ViewModel {
             return "session";
         } else if (this._loginViewModel) {
             return "login";
+        } else if (this._logoutViewModel) {
+            return "logout";
         } else if (this._sessionPickerViewModel) {
             return "picker";
         } else if (this._sessionLoadViewModel) {
@@ -160,12 +179,14 @@ export class RootViewModel extends ViewModel {
         this._sessionPickerViewModel = this.disposeTracked(this._sessionPickerViewModel);
         this._sessionLoadViewModel = this.disposeTracked(this._sessionLoadViewModel);
         this._loginViewModel = this.disposeTracked(this._loginViewModel);
+        this._logoutViewModel = this.disposeTracked(this._logoutViewModel);
         this._sessionViewModel = this.disposeTracked(this._sessionViewModel);
         // now set it again
         setter();
         this._sessionPickerViewModel && this.track(this._sessionPickerViewModel);
         this._sessionLoadViewModel && this.track(this._sessionLoadViewModel);
         this._loginViewModel && this.track(this._loginViewModel);
+        this._logoutViewModel && this.track(this._logoutViewModel);
         this._sessionViewModel && this.track(this._sessionViewModel);
         this.emitChange("activeSection");
     }
@@ -173,6 +194,7 @@ export class RootViewModel extends ViewModel {
     get error() { return this._error; }
     get sessionViewModel() { return this._sessionViewModel; }
     get loginViewModel() { return this._loginViewModel; }
+    get logoutViewModel() { return this._logoutViewModel; }
     get sessionPickerViewModel() { return this._sessionPickerViewModel; }
     get sessionLoadViewModel() { return this._sessionLoadViewModel; }
 }

src/domain/SessionLoadViewModel.js

@@ -14,20 +14,24 @@ See the License for the specific language governing permissions and
 limitations under the License.
 */
 
-import {LoadStatus, LoginFailure} from "../matrix/SessionContainer.js";
+import {AccountSetupViewModel} from "./AccountSetupViewModel.js";
+import {LoadStatus} from "../matrix/Client.js";
 import {SyncStatus} from "../matrix/Sync.js";
-import {ViewModel} from "./ViewModel.js";
+import {ViewModel} from "./ViewModel";
 
 export class SessionLoadViewModel extends ViewModel {
     constructor(options) {
         super(options);
-        const {createAndStartSessionContainer, ready, homeserver, deleteSessionOnCancel} = options;
-        this._createAndStartSessionContainer = createAndStartSessionContainer;
+        const {client, ready, homeserver, deleteSessionOnCancel} = options;
+        this._client = client;
         this._ready = ready;
         this._homeserver = homeserver;
         this._deleteSessionOnCancel = deleteSessionOnCancel;
         this._loading = false;
         this._error = null;
+        this.backUrl = this.urlCreator.urlForSegment("session", true);
+        this._accountSetupViewModel = undefined;
+
     }
 
     async start() {
@@ -37,12 +41,16 @@ export class SessionLoadViewModel extends ViewModel {
         try {
             this._loading = true;
             this.emitChange("loading");
-            this._sessionContainer = this._createAndStartSessionContainer();
-            this._waitHandle = this._sessionContainer.loadStatus.waitFor(s => {
+            this._waitHandle = this._client.loadStatus.waitFor(s => {
+                if (s === LoadStatus.AccountSetup) {
+                    this._accountSetupViewModel = new AccountSetupViewModel(this.childOptions({accountSetup: this._client.accountSetup}));
+                } else {
+                    this._accountSetupViewModel = undefined;
+                }
                 this.emitChange("loadLabel");
                 // wait for initial sync, but not catchup sync
                 const isCatchupSync = s === LoadStatus.FirstSync &&
-                    this._sessionContainer.sync.status.get() === SyncStatus.CatchupSync;
+                    this._client.sync.status.get() === SyncStatus.CatchupSync;
                 return isCatchupSync ||
                     s === LoadStatus.LoginFailed ||
                     s === LoadStatus.Error ||
@@ -59,15 +67,15 @@ export class SessionLoadViewModel extends ViewModel {
             // much like we will once you are in the app. Probably a good idea
 
             // did it finish or get stuck at LoginFailed or Error?
-            const loadStatus = this._sessionContainer.loadStatus.get();
-            const loadError = this._sessionContainer.loadError;
+            const loadStatus = this._client.loadStatus.get();
+            const loadError = this._client.loadError;
             if (loadStatus === LoadStatus.FirstSync || loadStatus === LoadStatus.Ready) {
-                const sessionContainer = this._sessionContainer;
+                const client = this._client;
                 // session container is ready,
                 // don't dispose it anymore when 
                 // we get disposed
-                this._sessionContainer = null;
-                this._ready(sessionContainer);
+                this._client = null;
+                this._ready(client);
             }
             if (loadError) {
                 console.error("session load error", loadError);
@@ -77,16 +85,16 @@ export class SessionLoadViewModel extends ViewModel {
             console.error("error thrown during session load", err.stack);
         } finally {
             this._loading = false;
-            // loadLabel in case of sc.loadError also gets updated through this
+            // loadLabel in case of client.loadError also gets updated through this
             this.emitChange("loading");
         }
     }
 
 
     dispose() {
-        if (this._sessionContainer) {
-            this._sessionContainer.dispose();
-            this._sessionContainer = null;
+        if (this._client) {
+            this._client.dispose();
+            this._client = null;
         }
         if (this._waitHandle) {
             // rejects with AbortError
@@ -97,33 +105,27 @@ export class SessionLoadViewModel extends ViewModel {
 
     // to show a spinner or not
     get loading() {
+        const client = this._client;
+        if (client && client.loadStatus.get() === LoadStatus.AccountSetup) {
+            return false;
+        }
         return this._loading;
     }
 
     get loadLabel() {
-        const sc = this._sessionContainer;
-        const error = this._error || (sc && sc.loadError);
-
-        if (error || (sc && sc.loadStatus.get() === LoadStatus.Error)) {
+        const client = this._client;
+        const error = this._getError();
+        if (error || (client && client.loadStatus.get() === LoadStatus.Error)) {
             return `Something went wrong: ${error && error.message}.`;
         }
 
-        if (sc) {
-            switch (sc.loadStatus.get()) {
-                case LoadStatus.NotLoading:
-                    return `Preparing…`;
-                case LoadStatus.Login:
-                    return `Checking your login and password…`;
-                case LoadStatus.LoginFailed:
-                    switch (sc.loginFailure) {
-                        case LoginFailure.LoginFailure:
-                            return `Your username and/or password don't seem to be correct.`;
-                        case LoginFailure.Connection:
-                            return `Can't connect to ${this._homeserver}.`;
-                        case LoginFailure.Unknown:
-                            return `Something went wrong while checking your login and password.`;
-                    }
-                    break;
+        // Statuses related to login are handled by respective login view models
+        if (client) {
+            switch (client.loadStatus.get()) {
+                case LoadStatus.QueryAccount:
+                    return `Querying account encryption setup…`;
+                case LoadStatus.AccountSetup:
+                    return ""; // we'll show a header ing AccountSetupView
                 case LoadStatus.SessionSetup:
                     return `Setting up your encryption keys…`;
                 case LoadStatus.Loading:
@@ -131,10 +133,32 @@ export class SessionLoadViewModel extends ViewModel {
                 case LoadStatus.FirstSync:
                     return `Getting your conversations from the server…`;
                 default:
-                    return this._sessionContainer.loadStatus.get();
+                    return this._client.loadStatus.get();
             }
         }
 
         return `Preparing…`;
     }
+
+    _getError() {
+        return this._error || this._client?.loadError; 
+    }
+
+    get hasError() {
+        return !!this._getError();
+    }
+
+    async exportLogs() {
+        const logExport = await this.logger.export();
+        this.platform.saveFileAs(logExport.asBlob(), `hydrogen-logs-${this.platform.clock.now()}.json`);
+    }
+
+    async logout() {
+        await this._client.logout();
+        this.navigation.push("session", true);
+    }
+
+    get accountSetupViewModel() {
+        return this._accountSetupViewModel;
+    }
 }

src/domain/SessionPickerViewModel.js

@@ -15,8 +15,8 @@ limitations under the License.
 */
 
 import {SortedArray} from "../observable/index.js";
-import {ViewModel} from "./ViewModel.js";
-import {avatarInitials, getIdentifierColorNumber} from "./avatar.js";
+import {ViewModel} from "./ViewModel";
+import {avatarInitials, getIdentifierColorNumber} from "./avatar";
 
 class SessionItemViewModel extends ViewModel {
     constructor(options, pickerVM) {
@@ -33,44 +33,6 @@ class SessionItemViewModel extends ViewModel {
         return this._error && this._error.message;
     }
 
-    async delete() {
-        this._isDeleting = true;
-        this.emitChange("isDeleting");
-        try {
-            await this._pickerVM.delete(this.id);
-        } catch(err) {
-            this._error = err;
-            console.error(err);
-            this.emitChange("error");
-        } finally {
-            this._isDeleting = false;
-            this.emitChange("isDeleting");
-        }
-    }
-
-    async clear() {
-        this._isClearing = true;
-        this.emitChange();
-        try {
-            await this._pickerVM.clear(this.id);
-        } catch(err) {
-            this._error = err;
-            console.error(err);
-            this.emitChange("error");
-        } finally {
-            this._isClearing = false;
-            this.emitChange("isClearing");
-        }
-    }
-
-    get isDeleting() {
-        return this._isDeleting;
-    }
-
-    get isClearing() {
-        return this._isClearing;
-    }
-
     get id() {
         return this._sessionInfo.id;
     }
@@ -96,27 +58,6 @@ class SessionItemViewModel extends ViewModel {
         return this._exportDataUrl;
     }
 
-    async export() {
-        try {
-            const data = await this._pickerVM._exportData(this._sessionInfo.id);
-            const json = JSON.stringify(data, undefined, 2);
-            const blob = new Blob([json], {type: "application/json"});
-            this._exportDataUrl = URL.createObjectURL(blob);
-            this.emitChange("exportDataUrl");
-        } catch (err) {
-            alert(err.message);
-            console.error(err);
-        }
-    }
-
-    clearExport() {
-        if (this._exportDataUrl) {
-            URL.revokeObjectURL(this._exportDataUrl);
-            this._exportDataUrl = null;
-            this.emitChange("exportDataUrl");
-        }
-    }
-
     get avatarColorNumber() {
         return getIdentifierColorNumber(this._sessionInfo.userId);
     }
@@ -148,39 +89,6 @@ export class SessionPickerViewModel extends ViewModel {
         return this._loadViewModel;
     }
 
-    async _exportData(id) {
-        const sessionInfo = await this.platform.sessionInfoStorage.get(id);
-        const stores = await this.platform.storageFactory.export(id);
-        const data = {sessionInfo, stores};
-        return data;
-    }
-
-    async import(json) {
-        try {
-            const data = JSON.parse(json);
-            const {sessionInfo} = data;
-            sessionInfo.comment = `Imported on ${new Date().toLocaleString()} from id ${sessionInfo.id}.`;
-            sessionInfo.id = this._createSessionContainer().createNewSessionId();
-            await this.platform.storageFactory.import(sessionInfo.id, data.stores);
-            await this.platform.sessionInfoStorage.add(sessionInfo);
-            this._sessions.set(new SessionItemViewModel(sessionInfo, this));
-        } catch (err) {
-            alert(err.message);
-            console.error(err);
-        }
-    }
-
-    async delete(id) {
-        const idx = this._sessions.array.findIndex(s => s.id === id);
-        await this.platform.sessionInfoStorage.delete(id);
-        await this.platform.storageFactory.delete(id);
-        this._sessions.remove(idx);
-    }
-
-    async clear(id) {
-        await this.platform.storageFactory.delete(id);
-    }
-
     get sessions() {
         return this._sessions;
     }

src/domain/ViewModel.ts

@@ -1,5 +1,6 @@
 /*
 Copyright 2020 Bruno Windels <bruno@windels.cloud>
+Copyright 2022 The Matrix.org Foundation C.I.C.
 
 Licensed under the Apache License, Version 2.0 (the "License");
 you may not use this file except in compliance with the License.
@@ -18,57 +19,85 @@ limitations under the License.
 // as in some cases it would really be more convenient to have multiple events (like telling the timeline to scroll down)
 // we do need to return a disposable from EventEmitter.on, or at least have a method here to easily track a subscription to an EventEmitter
 
-import {EventEmitter} from "../utils/EventEmitter.js";
-import {Disposables} from "../utils/Disposables.js";
+import {EventEmitter} from "../utils/EventEmitter";
+import {Disposables} from "../utils/Disposables";
 
-export class ViewModel extends EventEmitter {
-    constructor(options = {}) {
+import type {Disposable} from "../utils/Disposables";
+import type {Platform} from "../platform/web/Platform";
+import type {Clock} from "../platform/web/dom/Clock";
+import type {ILogger} from "../logging/types";
+import type {Navigation} from "./navigation/Navigation";
+import type {SegmentType} from "./navigation/index";
+import type {IURLRouter} from "./navigation/URLRouter";
+
+export type Options<T extends object = SegmentType> = {
+    platform: Platform;
+    logger: ILogger;
+    urlCreator: IURLRouter<T>;
+    navigation: Navigation<T>;
+    emitChange?: (params: any) => void;
+}
+
+
+export class ViewModel<N extends object = SegmentType, O extends Options<N> = Options<N>> extends EventEmitter<{change: never}> {
+    private disposables?: Disposables;
+    private _isDisposed = false;
+    private _options: Readonly<O>;
+
+    constructor(options: Readonly<O>) {
         super();
-        this.disposables = null;
-        this._isDisposed = false;
         this._options = options;
     }
 
-    childOptions(explicitOptions) {
-        const {navigation, urlCreator, platform} = this._options;
-        return Object.assign({navigation, urlCreator, platform}, explicitOptions);
+    childOptions<T extends Object>(explicitOptions: T): T & Options<N> {
+        return Object.assign({}, this._options, explicitOptions);
     }
 
+    get options(): Readonly<O> { return this._options; }
+
     // makes it easier to pass through dependencies of a sub-view model
-    getOption(name) {
+    getOption<N extends keyof O>(name: N): O[N]  {
         return this._options[name];
     }
 
-    track(disposable) {
+    observeNavigation<T extends keyof N>(type: T, onChange: (value: N[T], type: T) => void): void {
+      const segmentObservable = this.navigation.observe(type);
+      const unsubscribe = segmentObservable.subscribe((value: N[T]) => {
+        onChange(value, type);
+      });
+      this.track(unsubscribe);
+    }
+
+    track<D extends Disposable>(disposable: D): D {
         if (!this.disposables) {
             this.disposables = new Disposables();
         }
         return this.disposables.track(disposable);
     }
 
-    untrack(disposable) {
+    untrack(disposable: Disposable): undefined {
         if (this.disposables) {
             return this.disposables.untrack(disposable);
         }
-        return null;
+        return undefined;
     }
 
-    dispose() {
+    dispose(): void {
         if (this.disposables) {
             this.disposables.dispose();
         }
         this._isDisposed = true;
     }
 
-    get isDisposed() {
+    get isDisposed(): boolean {
         return this._isDisposed;
     }
 
-    disposeTracked(disposable) {
+    disposeTracked(disposable: Disposable | undefined): undefined {
         if (this.disposables) {
             return this.disposables.disposeTracked(disposable);
         }
-        return null;
+        return undefined;
     }
 
     // TODO: this will need to support binding
@@ -76,7 +105,7 @@ export class ViewModel extends EventEmitter {
     //
     // translated string should probably always be bindings, unless we're fine with a refresh when changing the language?
     // we probably are, if we're using routing with a url, we could just refresh.
-    i18n(parts, ...expr) {
+    i18n(parts: TemplateStringsArray, ...expr: any[]): string {
         // just concat for now
         let result = "";
         for (let i = 0; i < parts.length; ++i) {
@@ -88,11 +117,7 @@ export class ViewModel extends EventEmitter {
         return result;
     }
 
-    updateOptions(options) {
-        this._options = Object.assign(this._options, options);
-    }
-
-    emitChange(changedProps) {
+    emitChange(changedProps: any): void {
         if (this._options.emitChange) {
             this._options.emitChange(changedProps);
         } else {
@@ -100,27 +125,24 @@ export class ViewModel extends EventEmitter {
         }
     }
 
-    get platform() {
+    get platform(): Platform {
         return this._options.platform;
     }
 
-    get clock() {
+    get clock(): Clock {
         return this._options.platform.clock;
     }
 
-    get logger() {
+    get logger(): ILogger {
         return this.platform.logger;
     }
 
-    /**
-     * The url router, only meant to be used to create urls with from view models.
-     * @return {URLRouter}
-     */
-    get urlCreator() {
+    get urlCreator(): IURLRouter<N> {
         return this._options.urlCreator;
     }
 
-    get navigation() {
-        return this._options.navigation;
+    get navigation(): Navigation<N> {
+        // typescript needs a little help here
+        return this._options.navigation as unknown as Navigation<N>;
     }
 }

src/domain/avatar.ts

@@ -14,7 +14,10 @@ See the License for the specific language governing permissions and
 limitations under the License.
 */
 
-export function avatarInitials(name) {
+import { Platform } from "../platform/web/Platform";
+import { MediaRepository } from "../matrix/net/MediaRepository";
+
+export function avatarInitials(name: string): string {
     let firstChar = name.charAt(0);
     if (firstChar === "!" || firstChar === "@" || firstChar === "#") {
         firstChar = name.charAt(1);
@@ -29,10 +32,10 @@ export function avatarInitials(name) {
  *
  * @return {number}
  */
-function hashCode(str) {
+function hashCode(str: string): number {
     let hash = 0;
-    let i;
-    let chr;
+    let i: number;
+    let chr: number;
     if (str.length === 0) {
         return hash;
     }
@@ -44,6 +47,14 @@ function hashCode(str) {
     return Math.abs(hash);
 }
 
-export function getIdentifierColorNumber(id) {
+export function getIdentifierColorNumber(id: string): number {
     return (hashCode(id) % 8) + 1;
 }
+
+export function getAvatarHttpUrl(avatarUrl: string, cssSize: number, platform: Platform, mediaRepository: MediaRepository): string | null {
+    if (avatarUrl) {
+        const imageSize = cssSize * platform.devicePixelRatio;
+        return mediaRepository.mxcUrlThumbnail(avatarUrl, imageSize, imageSize, "crop");
+    }
+    return null;
+}

src/domain/login/CompleteSSOLoginViewModel.js

@@ -0,0 +1,76 @@
+/*
+Copyright 2021 The Matrix.org Foundation C.I.C.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+import {ViewModel} from "../ViewModel";
+import {LoginFailure} from "../../matrix/Client.js";
+
+export class CompleteSSOLoginViewModel extends ViewModel {
+    constructor(options) {
+        super(options);
+        const {
+            loginToken,
+            client,
+            attemptLogin,
+        } = options;
+        this._loginToken = loginToken;
+        this._client = client;
+        this._attemptLogin = attemptLogin;
+        this._errorMessage = "";
+        this.performSSOLoginCompletion();
+    }
+
+    get errorMessage() { return this._errorMessage; }
+
+    _showError(message) {
+        this._errorMessage = message;
+        this.emitChange("errorMessage");
+    }
+
+    async performSSOLoginCompletion() {
+        if (!this._loginToken) {
+            return;
+        }
+        const homeserver = await this.platform.settingsStorage.getString("sso_ongoing_login_homeserver");
+        let loginOptions;
+        try {
+            loginOptions = await this._client.queryLogin(homeserver).result;
+        }
+        catch (err) {
+            this._showError(err.message);
+            return;
+        }
+        if (!loginOptions.token) {
+            this.navigation.push("session");
+            return;
+        }
+        const status = await this._attemptLogin(loginOptions.token(this._loginToken));
+        let error = "";
+        switch (status) {
+            case LoginFailure.Credentials:
+                error = this.i18n`Your login token is invalid.`;
+                break;
+            case LoginFailure.Connection:
+                error = this.i18n`Can't connect to ${homeserver}.`;
+                break;
+            case LoginFailure.Unknown:
+                error = this.i18n`Something went wrong while checking your login token.`;
+                break;
+        }
+        if (error) {
+            this._showError(error);
+        }
+    }
+}

src/domain/login/LoginViewModel.ts

@@ -0,0 +1,293 @@
+/*
+Copyright 2020 Bruno Windels <bruno@windels.cloud>
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+import {Client} from "../../matrix/Client.js";
+import {Options as BaseOptions, ViewModel} from "../ViewModel";
+import {PasswordLoginViewModel} from "./PasswordLoginViewModel.js";
+import {StartSSOLoginViewModel} from "./StartSSOLoginViewModel.js";
+import {CompleteSSOLoginViewModel} from "./CompleteSSOLoginViewModel.js";
+import {LoadStatus} from "../../matrix/Client.js";
+import {SessionLoadViewModel} from "../SessionLoadViewModel.js";
+import {SegmentType} from "../navigation/index";
+
+import type {PasswordLoginMethod, SSOLoginHelper, TokenLoginMethod, ILoginMethod} from "../../matrix/login";
+
+type Options = {
+    defaultHomeserver: string;
+    ready: ReadyFn;
+    loginToken?: string;
+} & BaseOptions;
+
+export class LoginViewModel extends ViewModel<SegmentType, Options> {
+    private _ready: ReadyFn;
+    private _loginToken?: string;
+    private _client: Client;
+    private _loginOptions?: LoginOptions;
+    private _passwordLoginViewModel?: PasswordLoginViewModel;
+    private _startSSOLoginViewModel?: StartSSOLoginViewModel;
+    private _completeSSOLoginViewModel?: CompleteSSOLoginViewModel;
+    private _loadViewModel?: SessionLoadViewModel;
+    private _loadViewModelSubscription?: () => void;
+    private _homeserver: string;
+    private _queriedHomeserver?: string;
+    private _abortHomeserverQueryTimeout?: () => void;
+    private _abortQueryOperation?: () => void;
+
+    private _hideHomeserver: boolean = false;
+    private _isBusy: boolean = false;
+    private _errorMessage: string = "";
+
+    constructor(options: Readonly<Options>) {
+        super(options);
+        const {ready, defaultHomeserver, loginToken} = options;
+        this._ready = ready;
+        this._loginToken = loginToken;
+        this._client = new Client(this.platform);
+        this._homeserver = defaultHomeserver;
+        this._initViewModels();
+    }
+
+    get passwordLoginViewModel(): PasswordLoginViewModel {
+        return this._passwordLoginViewModel;
+    }
+
+    get startSSOLoginViewModel(): StartSSOLoginViewModel {
+        return this._startSSOLoginViewModel;
+    }
+
+    get completeSSOLoginViewModel(): CompleteSSOLoginViewModel {
+        return this._completeSSOLoginViewModel;
+    }
+
+    get homeserver(): string {
+        return this._homeserver;
+    }
+
+    get resolvedHomeserver(): string | undefined {
+        return this._loginOptions?.homeserver;
+    }
+
+    get errorMessage(): string {
+        return this._errorMessage;
+    }
+
+    get showHomeserver(): boolean {
+        return !this._hideHomeserver;
+    }
+
+    get loadViewModel(): SessionLoadViewModel {
+        return this._loadViewModel;
+    }
+
+    get isBusy(): boolean {
+        return this._isBusy;
+    }
+
+    get isFetchingLoginOptions(): boolean {
+        return !!this._abortQueryOperation;
+    }
+
+    goBack(): void {
+        this.navigation.push("session");
+    }
+
+    private _initViewModels(): void {
+        if (this._loginToken) {
+            this._hideHomeserver = true;
+            this._completeSSOLoginViewModel = this.track(new CompleteSSOLoginViewModel(
+                this.childOptions(
+                    {
+                        client: this._client,
+                        attemptLogin: (loginMethod: TokenLoginMethod) => this.attemptLogin(loginMethod),
+                        loginToken: this._loginToken
+                    })));
+            this.emitChange("completeSSOLoginViewModel");
+        }
+        else {
+            void this.queryHomeserver();
+        }
+    }
+
+    private _showPasswordLogin(): void {
+        this._passwordLoginViewModel = this.track(new PasswordLoginViewModel(
+            this.childOptions({
+                loginOptions: this._loginOptions,
+                attemptLogin: (loginMethod: PasswordLoginMethod) => this.attemptLogin(loginMethod)
+        })));
+        this.emitChange("passwordLoginViewModel");
+    }
+
+    private _showSSOLogin(): void {
+        this._startSSOLoginViewModel = this.track(
+            new StartSSOLoginViewModel(this.childOptions({loginOptions: this._loginOptions}))
+        );
+        this.emitChange("startSSOLoginViewModel");
+    }
+
+    private _showError(message: string): void {
+        this._errorMessage = message;
+        this.emitChange("errorMessage");
+    }
+
+    private _setBusy(status: boolean): void {
+        this._isBusy = status;
+        this._passwordLoginViewModel?.setBusy(status);
+        this._startSSOLoginViewModel?.setBusy(status);
+        this.emitChange("isBusy");
+    }
+
+    async attemptLogin(loginMethod: ILoginMethod): Promise<null> {
+        this._setBusy(true);
+        void this._client.startWithLogin(loginMethod, {inspectAccountSetup: true});
+        const loadStatus = this._client.loadStatus;
+        const handle = loadStatus.waitFor((status: LoadStatus) => status !== LoadStatus.Login);
+        await handle.promise;
+        this._setBusy(false);
+        const status = loadStatus.get();
+        if (status === LoadStatus.LoginFailed) {
+            return this._client.loginFailure;
+        }
+        this._hideHomeserver = true;
+        this.emitChange("hideHomeserver");
+        this._disposeViewModels();
+        void this._createLoadViewModel();
+        return null;
+    }
+
+    private _createLoadViewModel(): void {
+        this._loadViewModelSubscription = this.disposeTracked(this._loadViewModelSubscription);
+        this._loadViewModel = this.disposeTracked(this._loadViewModel);
+        this._loadViewModel = this.track(
+            new SessionLoadViewModel(
+                this.childOptions({
+                    ready: (client) => {
+                        // make sure we don't delete the session in dispose when navigating away
+                        this._client = null;
+                        this._ready(client);
+                    },
+                    client: this._client,
+                    homeserver: this._homeserver
+                })
+            )
+        );
+        void this._loadViewModel.start();
+        this.emitChange("loadViewModel");
+        this._loadViewModelSubscription = this.track(
+            this._loadViewModel.disposableOn("change", () => {
+                if (!this._loadViewModel.loading) {
+                    this._loadViewModelSubscription = this.disposeTracked(this._loadViewModelSubscription);
+                }
+                this._setBusy(false);
+            })
+        );
+    }
+
+    private _disposeViewModels(): void {
+        this._startSSOLoginViewModel = this.disposeTracked(this._startSSOLoginViewModel);
+        this._passwordLoginViewModel = this.disposeTracked(this._passwordLoginViewModel);
+        this._completeSSOLoginViewModel = this.disposeTracked(this._completeSSOLoginViewModel);
+        this.emitChange("disposeViewModels");
+    }
+
+    async setHomeserver(newHomeserver: string): Promise<void> {
+        this._homeserver = newHomeserver;
+        // clear everything set by queryHomeserver
+        this._loginOptions = undefined;
+        this._queriedHomeserver = undefined;
+        this._showError("");
+        this._disposeViewModels();
+        this._abortQueryOperation = this.disposeTracked(this._abortQueryOperation);
+        this.emitChange("loginViewModels"); // multiple fields changing
+        // also clear the timeout if it is still running
+        this.disposeTracked(this._abortHomeserverQueryTimeout);
+        const timeout = this.clock.createTimeout(1000);
+        this._abortHomeserverQueryTimeout = this.track(() => timeout.abort());
+        try {
+            await timeout.elapsed();
+        } catch (err) {
+            if (err.name === "AbortError") {
+                return; // still typing, don't query
+            } else {
+                throw err;
+            }
+        }
+        this._abortHomeserverQueryTimeout = this.disposeTracked(this._abortHomeserverQueryTimeout);
+        void this.queryHomeserver();
+    }
+
+    async queryHomeserver(): Promise<void> {
+        // don't repeat a query we've just done
+        if (this._homeserver === this._queriedHomeserver || this._homeserver === "") {
+            return;
+        }
+        this._queriedHomeserver = this._homeserver;
+        // given that setHomeserver already clears everything set here,
+        // and that is the only way to change the homeserver,
+        // we don't need to reset things again here.
+        // However, clear things set by setHomeserver:
+        // if query is called before the typing timeout hits (e.g. field lost focus),
+        // cancel the timeout so we don't query again.
+        this._abortHomeserverQueryTimeout = this.disposeTracked(this._abortHomeserverQueryTimeout);
+        // cancel ongoing query operation, if any
+        this._abortQueryOperation = this.disposeTracked(this._abortQueryOperation);
+        try {
+            const queryOperation = this._client.queryLogin(this._homeserver);
+            this._abortQueryOperation = this.track(() => queryOperation.abort());
+            this.emitChange("isFetchingLoginOptions");
+            this._loginOptions = await queryOperation.result;
+            this.emitChange("resolvedHomeserver");
+        }
+        catch (e) {
+            if (e.name === "AbortError") {
+                return; //aborted, bail out
+            } else {
+                this._loginOptions = undefined;
+            }
+        } finally {
+            this._abortQueryOperation = this.disposeTracked(this._abortQueryOperation);
+            this.emitChange("isFetchingLoginOptions");
+        }
+        if (this._loginOptions) {
+            if (this._loginOptions.sso) { this._showSSOLogin(); }
+            if (this._loginOptions.password) { this._showPasswordLogin(); }
+            if (!this._loginOptions.sso && !this._loginOptions.password) {
+                this._showError("This homeserver supports neither SSO nor password based login flows");
+            }
+        }
+        else {
+            this._showError(`Could not query login methods supported by ${this.homeserver}`);
+        }
+    }
+
+    dispose(): void {
+        super.dispose();
+        if (this._client) {
+            // if we move away before we're done with initial sync
+            // delete the session
+            void this._client.deleteSession();
+        }
+    }
+}
+
+type ReadyFn = (client: Client) => void;
+
+// TODO: move to Client.js when its converted to typescript.
+type LoginOptions = {
+    homeserver: string;
+    password?: (username: string, password: string) => PasswordLoginMethod;
+    sso?: SSOLoginHelper;
+    token?: (loginToken: string) => TokenLoginMethod;
+};

src/domain/login/PasswordLoginViewModel.js

@@ -0,0 +1,63 @@
+/*
+Copyright 2021 The Matrix.org Foundation C.I.C.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+import {ViewModel} from "../ViewModel";
+import {LoginFailure} from "../../matrix/Client.js";
+
+export class PasswordLoginViewModel extends ViewModel {
+    constructor(options) {
+        super(options);
+        const {loginOptions, attemptLogin} = options;
+        this._loginOptions = loginOptions;
+        this._attemptLogin = attemptLogin;
+        this._isBusy = false;
+        this._errorMessage = "";
+    }
+
+    get isBusy() { return this._isBusy; }
+    get errorMessage() { return this._errorMessage; }
+
+    setBusy(status) {
+        this._isBusy = status;
+        this.emitChange("isBusy");
+    }
+
+    _showError(message) {
+        this._errorMessage = message;
+        this.emitChange("errorMessage");
+    }
+
+    async login(username, password) {
+        this._errorMessage = "";
+        this.emitChange("errorMessage");
+        const status = await this._attemptLogin(this._loginOptions.password(username, password));
+        let error = "";
+        switch (status) {
+            case LoginFailure.Credentials:
+                error = this.i18n`Your username and/or password don't seem to be correct.`;
+                break;
+            case LoginFailure.Connection:
+                error = this.i18n`Can't connect to ${this._loginOptions.homeserver}.`;
+                break;
+            case LoginFailure.Unknown:
+                error = this.i18n`Something went wrong while checking your login and password.`;
+                break;
+        }
+        if (error) {
+            this._showError(error);
+        }
+    }
+}

src/domain/login/StartSSOLoginViewModel.js

@@ -0,0 +1,38 @@
+/*
+Copyright 2021 The Matrix.org Foundation C.I.C.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+import {ViewModel} from "../ViewModel";
+
+export class StartSSOLoginViewModel extends ViewModel{
+    constructor(options) {
+        super(options);
+        this._sso = options.loginOptions.sso;
+        this._isBusy = false;
+    }
+   
+    get isBusy() { return this._isBusy; }
+    
+    setBusy(status) {
+        this._isBusy = status;
+        this.emitChange("isBusy");
+    }
+
+    async startSSOLogin() {
+        await this.platform.settingsStorage.setString("sso_ongoing_login_homeserver", this._sso.homeserver);
+        const link = this._sso.createSSORedirectURL(this.urlCreator.createSSOCallbackURL());
+        this.platform.openUrl(link);
+    }
+}

src/domain/navigation/Navigation.ts

@@ -14,29 +14,51 @@ See the License for the specific language governing permissions and
 limitations under the License.
 */
 
-import {BaseObservableValue, ObservableValue} from "../../observable/ObservableValue.js";
+import {BaseObservableValue, ObservableValue} from "../../observable/ObservableValue";
 
-export class Navigation {
-    constructor(allowsChild) {
+
+type AllowsChild<T> = (parent: Segment<T> | undefined, child: Segment<T>) => boolean;
+
+/**
+ * OptionalValue is basically stating that if SegmentType[type] = true:
+ * - Allow this type to be optional
+ * - Give it a default value of undefined
+ * - Also allow it to be true
+ * This lets us do:
+ * const s: Segment<SegmentType> = new Segment("create-room");
+ * instead of
+ * const s: Segment<SegmentType> = new Segment("create-room", undefined);
+ */
+export type OptionalValue<T> = T extends true? [(undefined | true)?]: [T];
+
+export class Navigation<T extends object> {
+    private readonly _allowsChild: AllowsChild<T>;
+    private _path: Path<T>;
+    private readonly _observables: Map<keyof T, SegmentObservable<T>> = new Map();
+    private readonly _pathObservable: ObservableValue<Path<T>>;
+
+    constructor(allowsChild: AllowsChild<T>) {
         this._allowsChild = allowsChild;
         this._path = new Path([], allowsChild);
-        this._observables = new Map();
         this._pathObservable = new ObservableValue(this._path);
     }
 
-    get pathObservable() {
+    get pathObservable(): ObservableValue<Path<T>> {
         return this._pathObservable;
     }
 
-    get path() {
+    get path(): Path<T> {
         return this._path;
     }
 
-    push(type, value = undefined) {
-        return this.applyPath(this.path.with(new Segment(type, value)));
+    push<K extends keyof T>(type: K, ...value: OptionalValue<T[K]>): void {
+        const newPath = this.path.with(new Segment(type, ...value));
+        if (newPath) {
+            this.applyPath(newPath);
+        }
     }
 
-    applyPath(path) {
+    applyPath(path: Path<T>): void {
         // Path is not exported, so you can only create a Path through Navigation,
         // so we assume it respects the allowsChild rules
         const oldPath = this._path;
@@ -60,7 +82,7 @@ export class Navigation {
         this._pathObservable.set(this._path);
     }
 
-    observe(type) {
+    observe(type: keyof T): SegmentObservable<T> {
         let observable = this._observables.get(type);
         if (!observable) {
             observable = new SegmentObservable(this, type);
@@ -69,9 +91,9 @@ export class Navigation {
         return observable;
     }
 
-    pathFrom(segments) {
-        let parent;
-        let i;
+    pathFrom(segments: Segment<any>[]): Path<T> {
+        let parent: Segment<any> | undefined;
+        let i: number;
         for (i = 0; i < segments.length; i += 1) {
             if (!this._allowsChild(parent, segments[i])) {
                 return new Path(segments.slice(0, i), this._allowsChild);
@@ -81,12 +103,12 @@ export class Navigation {
         return new Path(segments, this._allowsChild);
     }
 
-    segment(type, value) {
-        return new Segment(type, value);
+    segment<K extends keyof T>(type: K, ...value: OptionalValue<T[K]>): Segment<T> {
+        return new Segment(type, ...value);
     }
 }
 
-function segmentValueEqual(a, b) {
+function segmentValueEqual<T>(a?: T[keyof T], b?: T[keyof T]): boolean {
     if (a === b) {
         return true;
     }
@@ -103,24 +125,29 @@ function segmentValueEqual(a, b) {
     return false;
 }
 
-export class Segment {
-    constructor(type, value) {
-        this.type = type;
-        this.value = value === undefined ? true : value;
+
+export class Segment<T, K extends keyof T = any> {
+    public value: T[K];
+
+    constructor(public type: K, ...value: OptionalValue<T[K]>) {
+        this.value = (value[0] === undefined ? true : value[0]) as unknown as T[K];
     }
 }
 
-class Path {
-    constructor(segments = [], allowsChild) {
+class Path<T> {
+    private readonly _segments: Segment<T, any>[];
+    private readonly _allowsChild: AllowsChild<T>;
+
+    constructor(segments: Segment<T>[] = [], allowsChild: AllowsChild<T>) {
         this._segments = segments;
         this._allowsChild = allowsChild;
     }
 
-    clone() {
+    clone(): Path<T> {
         return new Path(this._segments.slice(), this._allowsChild);
     }
 
-    with(segment) {
+    with(segment: Segment<T>): Path<T> | undefined {
         let index = this._segments.length - 1;
         do {
             if (this._allowsChild(this._segments[index], segment)) {
@@ -132,10 +159,10 @@ class Path {
             index -= 1;
         } while(index >= -1);
         // allow -1 as well so we check if the segment is allowed as root
-        return null;
+        return undefined;
     }
 
-    until(type) {
+    until(type: keyof T): Path<T> {
         const index = this._segments.findIndex(s => s.type === type);
         if (index !== -1) {
             return new Path(this._segments.slice(0, index + 1), this._allowsChild)
@@ -143,11 +170,27 @@ class Path {
         return new Path([], this._allowsChild);
     }
 
-    get(type) {
+    get(type: keyof T): Segment<T> | undefined {
         return this._segments.find(s => s.type === type);
     }
 
-    get segments() {
+    replace(segment: Segment<T>): Path<T> | undefined {
+        const index = this._segments.findIndex(s => s.type === segment.type);
+        if (index !== -1) {
+            const parent = this._segments[index - 1];
+            if (this._allowsChild(parent, segment)) {
+                const child = this._segments[index + 1];
+                if (!child || this._allowsChild(segment, child)) {
+                    const newSegments = this._segments.slice();
+                    newSegments[index] = segment;
+                    return new Path(newSegments, this._allowsChild);
+                }
+            }
+        }
+        return undefined;
+    }
+
+    get segments(): Segment<T>[] {
         return this._segments;
     }
 }
@@ -156,43 +199,49 @@ class Path {
  * custom observable so it always returns what is in navigation.path, even if we haven't emitted the change yet.
  * This ensures that observers of a segment can also read the most recent value of other segments.
  */
-class SegmentObservable extends BaseObservableValue {
-    constructor(navigation, type) {
+class SegmentObservable<T extends object> extends BaseObservableValue<T[keyof T] | undefined> {
+    private readonly _navigation: Navigation<T>;
+    private _type: keyof T;
+    private _lastSetValue?: T[keyof T];
+        
+    constructor(navigation: Navigation<T>, type: keyof T) {
         super();
         this._navigation = navigation;
         this._type = type;
         this._lastSetValue = navigation.path.get(type)?.value;
     }
 
-    get() {
+    get(): T[keyof T] | undefined {
         const path = this._navigation.path;
         const segment = path.get(this._type);
         const value = segment?.value;
         return value;
     }
 
-    emitIfChanged() {
+    emitIfChanged(): void {
         const newValue = this.get();
-        if (!segmentValueEqual(newValue, this._lastSetValue)) {
+        if (!segmentValueEqual<T>(newValue, this._lastSetValue)) {
             this._lastSetValue = newValue;
             this.emit(newValue);
         }
     }
 }
 
+export type {Path};
+
 export function tests() {
 
     function createMockNavigation() {
         return new Navigation((parent, {type}) => {
             switch (parent?.type) {
                 case undefined:
-                    return type === "1" || "2";
+                    return type === "1" || type === "2";
                 case "1":
                     return type === "1.1";
                 case "1.1":
                     return type === "1.1.1";
                 case "2":
-                    return type === "2.1" || "2.2";
+                    return type === "2.1" || type === "2.2";
                 default:
                     return false;
             }
@@ -200,7 +249,7 @@ export function tests() {
     }
 
     function observeTypes(nav, types) {
-        const changes = [];
+        const changes: {type:string, value:any}[] = [];
         for (const type of types) {
             nav.observe(type).subscribe(value => {
                 changes.push({type, value});
@@ -209,6 +258,12 @@ export function tests() {
         return changes;
     }
 
+    type SegmentType = {
+        "foo": number;
+        "bar": number;
+        "baz": number;
+    }
+
     return {
         "applying a path emits an event on the observable": assert => {
             const nav = createMockNavigation();
@@ -226,9 +281,20 @@ export function tests() {
             assert.equal(changes[1].value, 8);
         },
         "path.get": assert => {
-            const path = new Path([new Segment("foo", 5), new Segment("bar", 6)], () => true);
-            assert.equal(path.get("foo").value, 5);
-            assert.equal(path.get("bar").value, 6);
+            const path = new Path<SegmentType>([new Segment("foo", 5), new Segment("bar", 6)], () => true);
+            assert.equal(path.get("foo")!.value, 5);
+            assert.equal(path.get("bar")!.value, 6);
+        },
+        "path.replace success": assert => {
+            const path = new Path<SegmentType>([new Segment("foo", 5), new Segment("bar", 6)], () => true);
+            const newPath = path.replace(new Segment("foo", 1));
+            assert.equal(newPath!.get("foo")!.value, 1);
+            assert.equal(newPath!.get("bar")!.value, 6);
+        },
+        "path.replace not found": assert => {
+            const path = new Path<SegmentType>([new Segment("foo", 5), new Segment("bar", 6)], () => true);
+            const newPath = path.replace(new Segment("baz", 1));
+            assert.equal(newPath, null);
         }
     };
 }

src/domain/navigation/URLRouter.js

@@ -1,98 +0,0 @@
-/*
-Copyright 2020 The Matrix.org Foundation C.I.C.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-    http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
-*/
-
-export class URLRouter {
-    constructor({history, navigation, parseUrlPath, stringifyPath}) {
-        this._history = history;
-        this._navigation = navigation;
-        this._parseUrlPath = parseUrlPath;
-        this._stringifyPath = stringifyPath;
-        this._subscription = null;
-        this._pathSubscription = null;
-        this._isApplyingUrl = false;
-    }
-
-    attach() {
-        this._subscription = this._history.subscribe(url => this._applyUrl(url));
-        this._applyUrl(this._history.get());
-        this._pathSubscription = this._navigation.pathObservable.subscribe(path => this._applyNavigationPath(path));
-    }
-
-    dispose() {
-        this._subscription = this._subscription();
-        this._pathSubscription = this._pathSubscription();
-    }
-
-    _applyNavigationPath(path) {
-        const url = this.urlForPath(path);
-        if (url !== this._history.get()) {
-            if (this._isApplyingUrl) {
-                // redirect
-                this._history.replaceUrlSilently(url);
-            } else {
-                this._history.pushUrlSilently(url);
-            }
-        }
-    }
-
-    _applyUrl(url) {    
-        const urlPath = this._history.urlAsPath(url)
-        const navPath = this._navigation.pathFrom(this._parseUrlPath(urlPath, this._navigation.path));
-        // this will cause _applyNavigationPath to be called,
-        // so set a flag whether this request came from ourselves
-        // (in which case it is a redirect if the url does not match the current one)
-        this._isApplyingUrl = true;
-        this._navigation.applyPath(navPath);
-        this._isApplyingUrl = false;
-    }
-
-    pushUrl(url) {
-        this._history.pushUrl(url);
-    }
-
-    getLastUrl() {
-        return this._history.getLastUrl();
-    }
-
-    urlForSegments(segments) {
-        let path = this._navigation.path;
-        for (const segment of segments) {
-            path = path.with(segment);
-            if (!path) {
-                return;
-            }
-        }
-        return this.urlForPath(path);
-    }
-
-    urlForSegment(type, value) {
-        return this.urlForSegments([this._navigation.segment(type, value)]);
-    }
-
-    urlUntilSegment(type) {
-        return this.urlForPath(this._navigation.path.until(type));
-    }
-
-    urlForPath(path) {
-        return this._history.pathAsUrl(this._stringifyPath(path));
-    }
-
-    openRoomActionUrl(roomId) {
-        // not a segment to navigation knowns about, so append it manually
-        const urlPath = `${this._stringifyPath(this._navigation.path.until("session"))}/open-room/${roomId}`;
-        return this._history.pathAsUrl(urlPath);
-    }
-}

src/domain/navigation/URLRouter.ts

@@ -0,0 +1,160 @@
+/*
+Copyright 2020 The Matrix.org Foundation C.I.C.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+import type {History} from "../../platform/web/dom/History.js";
+import type {Navigation, Segment, Path, OptionalValue} from "./Navigation";
+import type {SubscriptionHandle} from "../../observable/BaseObservable";
+
+type ParseURLPath<T> = (urlPath: string, currentNavPath: Path<T>, defaultSessionId?: string) => Segment<T>[];
+type StringifyPath<T> = (path: Path<T>) => string;
+
+export interface IURLRouter<T> {
+    attach(): void;
+    dispose(): void;
+    pushUrl(url: string): void;
+    tryRestoreLastUrl(): boolean;
+    urlForSegments(segments: Segment<T>[]): string | undefined;
+    urlForSegment<K extends keyof T>(type: K, ...value: OptionalValue<T[K]>): string | undefined;
+    urlUntilSegment(type: keyof T): string;
+    urlForPath(path: Path<T>): string;
+    openRoomActionUrl(roomId: string): string;
+    createSSOCallbackURL(): string;
+    normalizeUrl(): void;
+}
+
+export class URLRouter<T extends {session: string | boolean}> implements IURLRouter<T> {
+    private readonly _history: History;
+    private readonly _navigation: Navigation<T>;
+    private readonly _parseUrlPath: ParseURLPath<T>;
+    private readonly _stringifyPath: StringifyPath<T>;
+    private _subscription?: SubscriptionHandle;
+    private _pathSubscription?: SubscriptionHandle;
+    private _isApplyingUrl: boolean = false;
+    private _defaultSessionId?: string;
+
+    constructor(history: History, navigation: Navigation<T>, parseUrlPath: ParseURLPath<T>, stringifyPath: StringifyPath<T>) {
+        this._history = history;
+        this._navigation = navigation;
+        this._parseUrlPath = parseUrlPath;
+        this._stringifyPath = stringifyPath;
+        this._defaultSessionId = this._getLastSessionId();
+    }
+
+    private _getLastSessionId(): string | undefined {
+        const navPath = this._urlAsNavPath(this._history.getLastSessionUrl() || "");
+        const sessionId = navPath.get("session")?.value;
+        if (typeof sessionId === "string") {
+            return sessionId;
+        }
+        return undefined;
+    }
+
+    attach(): void {
+        this._subscription = this._history.subscribe(url => this._applyUrl(url));
+        // subscribe to path before applying initial url
+        // so redirects in _applyNavPathToHistory are reflected in url bar
+        this._pathSubscription = this._navigation.pathObservable.subscribe(path => this._applyNavPathToHistory(path));
+        this._applyUrl(this._history.get());
+    }
+
+    dispose(): void {
+        if (this._subscription) { this._subscription = this._subscription(); }
+        if (this._pathSubscription) { this._pathSubscription = this._pathSubscription(); }
+    }
+
+    private _applyNavPathToHistory(path: Path<T>): void {
+        const url = this.urlForPath(path);
+        if (url !== this._history.get()) {
+            if (this._isApplyingUrl) {
+                // redirect
+                this._history.replaceUrlSilently(url);
+            } else {
+                this._history.pushUrlSilently(url);
+            }
+        }
+    }
+
+    private _applyNavPathToNavigation(navPath: Path<T>): void {
+        // this will cause _applyNavPathToHistory to be called,
+        // so set a flag whether this request came from ourselves
+        // (in which case it is a redirect if the url does not match the current one)
+        this._isApplyingUrl = true;
+        this._navigation.applyPath(navPath);
+        this._isApplyingUrl = false;
+    }
+
+    private _urlAsNavPath(url: string): Path<T> {
+        const urlPath = this._history.urlAsPath(url);
+        return this._navigation.pathFrom(this._parseUrlPath(urlPath, this._navigation.path, this._defaultSessionId));
+    }
+
+    private _applyUrl(url: string): void {
+        const navPath = this._urlAsNavPath(url);
+        this._applyNavPathToNavigation(navPath);
+    }
+
+    pushUrl(url: string): void {
+        this._history.pushUrl(url);
+    }
+
+    tryRestoreLastUrl(): boolean {
+        const lastNavPath = this._urlAsNavPath(this._history.getLastSessionUrl() || "");
+        if (lastNavPath.segments.length !== 0) {
+            this._applyNavPathToNavigation(lastNavPath);
+            return true;
+        }
+        return false;
+    }
+
+    urlForSegments(segments: Segment<T>[]): string | undefined {
+        let path: Path<T> | undefined = this._navigation.path;
+        for (const segment of segments) {
+            path = path.with(segment);
+            if (!path) {
+                return;
+            }
+        }
+        return this.urlForPath(path);
+    }
+
+    urlForSegment<K extends keyof T>(type: K, ...value: OptionalValue<T[K]>): string | undefined {
+        return this.urlForSegments([this._navigation.segment(type, ...value)]);
+    }
+
+    urlUntilSegment(type: keyof T): string {
+        return this.urlForPath(this._navigation.path.until(type));
+    }
+
+    urlForPath(path: Path<T>): string {
+        return this._history.pathAsUrl(this._stringifyPath(path));
+    }
+
+    openRoomActionUrl(roomId: string): string {
+        // not a segment to navigation knowns about, so append it manually
+        const urlPath = `${this._stringifyPath(this._navigation.path.until("session"))}/open-room/${roomId}`;
+        return this._history.pathAsUrl(urlPath);
+    }
+
+    createSSOCallbackURL(): string {
+        return window.location.origin;
+    }
+
+    normalizeUrl(): void {
+        // Remove any queryParameters from the URL
+        // Gets rid of the loginToken after SSO
+        this._history.replaceUrlSilently(`${window.location.origin}/${window.location.hash}`);
+    }
+}

src/domain/navigation/index.js

@@ -1,248 +0,0 @@
-/*
-Copyright 2020 The Matrix.org Foundation C.I.C.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-    http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
-*/
-
-import {Navigation, Segment} from "./Navigation.js";
-import {URLRouter} from "./URLRouter.js";
-
-export function createNavigation() {
-    return new Navigation(allowsChild);
-}
-
-export function createRouter({history, navigation}) {
-    return new URLRouter({history, navigation, stringifyPath, parseUrlPath});
-}
-
-function allowsChild(parent, child) {
-    const {type} = child;
-    switch (parent?.type) {
-        case undefined:
-            // allowed root segments
-            return type === "login"  || type === "session";
-        case "session":
-            return type === "room" || type === "rooms" || type === "settings";
-        case "rooms":
-            // downside of the approach: both of these will control which tile is selected
-            return type === "room" || type === "empty-grid-tile";
-        case "room":
-            return type === "lightbox";
-        default:
-            return false;
-    }
-}
-
-function roomsSegmentWithRoom(rooms, roomId, path) {
-    if(!rooms.value.includes(roomId)) {
-        const emptyGridTile = path.get("empty-grid-tile");
-        const oldRoom = path.get("room");
-        let index = 0;
-        if (emptyGridTile) {
-            index = emptyGridTile.value;
-        } else if (oldRoom) {
-            index = rooms.value.indexOf(oldRoom.value);
-        }
-        const roomIds = rooms.value.slice();
-        roomIds[index] = roomId;
-        return new Segment("rooms", roomIds);
-    } else {
-        return rooms;
-    }
-}
-
-export function parseUrlPath(urlPath, currentNavPath) {
-    // substr(1) to take of initial /
-    const parts = urlPath.substr(1).split("/");
-    const iterator = parts[Symbol.iterator]();
-    const segments = [];
-    let next; 
-    while (!(next = iterator.next()).done) {
-        const type = next.value;
-        if (type === "rooms") {
-            const roomsValue = iterator.next().value;
-            if (roomsValue === undefined) { break; }
-            const roomIds = roomsValue.split(",");
-            segments.push(new Segment(type, roomIds));
-            const selectedIndex = parseInt(iterator.next().value || "0", 10);
-            const roomId = roomIds[selectedIndex];
-            if (roomId) {
-                segments.push(new Segment("room", roomId));
-            } else {
-                segments.push(new Segment("empty-grid-tile", selectedIndex));
-            }
-        } else if (type === "open-room") {
-            const roomId = iterator.next().value;
-            if (!roomId) { break; }
-            const rooms = currentNavPath.get("rooms");
-            if (rooms) {
-                segments.push(roomsSegmentWithRoom(rooms, roomId, currentNavPath));
-            }
-            segments.push(new Segment("room", roomId));
-        } else {
-            // might be undefined, which will be turned into true by Segment 
-            const value = iterator.next().value;
-            segments.push(new Segment(type, value));
-        }
-    }
-    return segments;
-}
-
-export function stringifyPath(path) {
-    let urlPath = "";
-    let prevSegment;
-    for (const segment of path.segments) {
-        switch (segment.type) {
-            case "rooms":
-                urlPath += `/rooms/${segment.value.join(",")}`;
-                break;
-            case "empty-grid-tile":
-                urlPath += `/${segment.value}`;
-                break;
-            case "room":
-                if (prevSegment?.type === "rooms") {
-                    const index = prevSegment.value.indexOf(segment.value);
-                    urlPath += `/${index}`;
-                } else {
-                    urlPath += `/${segment.type}/${segment.value}`;
-                }
-                break;
-            default:
-                urlPath += `/${segment.type}`;
-                if (segment.value && segment.value !== true) {
-                    urlPath += `/${segment.value}`;
-                }
-        }
-        prevSegment = segment;
-    }
-    return urlPath;
-}
-
-export function tests() {
-    return {
-        "stringify grid url with focused empty tile": assert => {
-            const nav = new Navigation(allowsChild);
-            const path = nav.pathFrom([
-                new Segment("session", 1),
-                new Segment("rooms", ["a", "b", "c"]),
-                new Segment("empty-grid-tile", 3)
-            ]);
-            const urlPath = stringifyPath(path);
-            assert.equal(urlPath, "/session/1/rooms/a,b,c/3");
-        },
-        "stringify grid url with focused room": assert => {
-            const nav = new Navigation(allowsChild);
-            const path = nav.pathFrom([
-                new Segment("session", 1),
-                new Segment("rooms", ["a", "b", "c"]),
-                new Segment("room", "b")
-            ]);
-            const urlPath = stringifyPath(path);
-            assert.equal(urlPath, "/session/1/rooms/a,b,c/1");
-        },
-        "parse grid url path with focused empty tile": assert => {
-            const segments = parseUrlPath("/session/1/rooms/a,b,c/3");
-            assert.equal(segments.length, 3);
-            assert.equal(segments[0].type, "session");
-            assert.equal(segments[0].value, "1");
-            assert.equal(segments[1].type, "rooms");
-            assert.deepEqual(segments[1].value, ["a", "b", "c"]);
-            assert.equal(segments[2].type, "empty-grid-tile");
-            assert.equal(segments[2].value, 3);
-        },
-        "parse grid url path with focused room": assert => {
-            const segments = parseUrlPath("/session/1/rooms/a,b,c/1");
-            assert.equal(segments.length, 3);
-            assert.equal(segments[0].type, "session");
-            assert.equal(segments[0].value, "1");
-            assert.equal(segments[1].type, "rooms");
-            assert.deepEqual(segments[1].value, ["a", "b", "c"]);
-            assert.equal(segments[2].type, "room");
-            assert.equal(segments[2].value, "b");
-        },
-        "parse empty grid url": assert => {
-            const segments = parseUrlPath("/session/1/rooms/");
-            assert.equal(segments.length, 3);
-            assert.equal(segments[0].type, "session");
-            assert.equal(segments[0].value, "1");
-            assert.equal(segments[1].type, "rooms");
-            assert.deepEqual(segments[1].value, [""]);
-            assert.equal(segments[2].type, "empty-grid-tile");
-            assert.equal(segments[2].value, 0);
-        },
-        "parse empty grid url with focus": assert => {
-            const segments = parseUrlPath("/session/1/rooms//1");
-            assert.equal(segments.length, 3);
-            assert.equal(segments[0].type, "session");
-            assert.equal(segments[0].value, "1");
-            assert.equal(segments[1].type, "rooms");
-            assert.deepEqual(segments[1].value, [""]);
-            assert.equal(segments[2].type, "empty-grid-tile");
-            assert.equal(segments[2].value, 1);
-        },
-        "parse open-room action replacing the current focused room": assert => {
-            const nav = new Navigation(allowsChild);
-            const path = nav.pathFrom([
-                new Segment("session", 1),
-                new Segment("rooms", ["a", "b", "c"]),
-                new Segment("room", "b")
-            ]);
-            const segments = parseUrlPath("/session/1/open-room/d", path);
-            assert.equal(segments.length, 3);
-            assert.equal(segments[0].type, "session");
-            assert.equal(segments[0].value, "1");
-            assert.equal(segments[1].type, "rooms");
-            assert.deepEqual(segments[1].value, ["a", "d", "c"]);
-            assert.equal(segments[2].type, "room");
-            assert.equal(segments[2].value, "d");
-        },
-        "parse open-room action changing focus to an existing room": assert => {
-            const nav = new Navigation(allowsChild);
-            const path = nav.pathFrom([
-                new Segment("session", 1),
-                new Segment("rooms", ["a", "b", "c"]),
-                new Segment("room", "b")
-            ]);
-            const segments = parseUrlPath("/session/1/open-room/a", path);
-            assert.equal(segments.length, 3);
-            assert.equal(segments[0].type, "session");
-            assert.equal(segments[0].value, "1");
-            assert.equal(segments[1].type, "rooms");
-            assert.deepEqual(segments[1].value, ["a", "b", "c"]);
-            assert.equal(segments[2].type, "room");
-            assert.equal(segments[2].value, "a");
-        },
-        "parse open-room action setting a room in an empty tile": assert => {
-            const nav = new Navigation(allowsChild);
-            const path = nav.pathFrom([
-                new Segment("session", 1),
-                new Segment("rooms", ["a", "b", "c"]),
-                new Segment("empty-grid-tile", 4)
-            ]);
-            const segments = parseUrlPath("/session/1/open-room/d", path);
-            assert.equal(segments.length, 3);
-            assert.equal(segments[0].type, "session");
-            assert.equal(segments[0].value, "1");
-            assert.equal(segments[1].type, "rooms");
-            assert.deepEqual(segments[1].value, ["a", "b", "c", , "d"]); //eslint-disable-line no-sparse-arrays
-            assert.equal(segments[2].type, "room");
-            assert.equal(segments[2].value, "d");
-        },
-        "parse session url path without id": assert => {
-            const segments = parseUrlPath("/session");
-            assert.equal(segments.length, 1);
-            assert.equal(segments[0].type, "session");
-            assert.strictEqual(segments[0].value, true);
-        }
-    }
-}

src/domain/navigation/index.ts

@@ -0,0 +1,490 @@
+/*
+Copyright 2020 The Matrix.org Foundation C.I.C.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+import {Navigation, Segment} from "./Navigation";
+import {URLRouter} from "./URLRouter";
+import type {Path, OptionalValue} from "./Navigation";
+
+export type SegmentType = {
+    "login": true;
+    "session": string | boolean;
+    "sso": string;
+    "logout": true;
+    "room": string;
+    "rooms": string[];
+    "settings": true;
+    "create-room": true;
+    "empty-grid-tile": number;
+    "lightbox": string;
+    "right-panel": true;
+    "details": true;
+    "members": true;
+    "member": string;
+};
+
+export function createNavigation(): Navigation<SegmentType> {
+    return new Navigation(allowsChild);
+}
+
+export function createRouter({history, navigation}: {history: History, navigation: Navigation<SegmentType>}): URLRouter<SegmentType> {
+    return new URLRouter(history, navigation, parseUrlPath, stringifyPath);
+}
+
+function allowsChild(parent: Segment<SegmentType> | undefined, child: Segment<SegmentType>): boolean {
+    const {type} = child;
+    switch (parent?.type) {
+        case undefined:
+            // allowed root segments
+            return type === "login"  || type === "session" || type === "sso" || type === "logout";
+        case "session":
+            return type === "room" || type === "rooms" || type === "settings" || type === "create-room";
+        case "rooms":
+            // downside of the approach: both of these will control which tile is selected
+            return type === "room" || type === "empty-grid-tile";
+        case "room":
+            return type === "lightbox" || type === "right-panel";
+        case "right-panel":
+            return type === "details"|| type === "members" || type === "member";
+        default:
+            return false;
+    }
+}
+
+export function removeRoomFromPath(path: Path<SegmentType>, roomId: string): Path<SegmentType> | undefined {
+    let newPath: Path<SegmentType> | undefined = path;
+    const rooms = newPath.get("rooms");
+    let roomIdGridIndex = -1;
+    // first delete from rooms segment
+    if (rooms) {
+        roomIdGridIndex = rooms.value.indexOf(roomId);
+        if (roomIdGridIndex !== -1) {
+            const idsWithoutRoom = rooms.value.slice();
+            idsWithoutRoom[roomIdGridIndex] = "";
+            newPath = newPath.replace(new Segment("rooms", idsWithoutRoom));
+        }
+    }
+    const room = newPath!.get("room");
+    // then from room (which occurs with or without rooms)
+    if (room && room.value === roomId) {
+        if (roomIdGridIndex !== -1) {
+            newPath = newPath!.with(new Segment("empty-grid-tile", roomIdGridIndex));
+        } else {
+            newPath = newPath!.until("session");
+        }
+    }
+    return newPath;
+}
+
+function roomsSegmentWithRoom(rooms: Segment<SegmentType, "rooms">, roomId: string, path: Path<SegmentType>): Segment<SegmentType, "rooms"> {
+    if(!rooms.value.includes(roomId)) {
+        const emptyGridTile = path.get("empty-grid-tile");
+        const oldRoom = path.get("room");
+        let index = 0;
+        if (emptyGridTile) {
+            index = emptyGridTile.value;
+        } else if (oldRoom) {
+            index = rooms.value.indexOf(oldRoom.value);
+        }
+        const roomIds = rooms.value.slice();
+        roomIds[index] = roomId;
+        return new Segment("rooms", roomIds);
+    } else {
+        return rooms;
+    }
+}
+
+function pushRightPanelSegment<T extends keyof SegmentType>(array: Segment<SegmentType>[], segment: T, ...value: OptionalValue<SegmentType[T]>): void {
+    array.push(new Segment("right-panel"));
+    array.push(new Segment(segment, ...value));
+}
+
+export function addPanelIfNeeded<T extends SegmentType>(navigation: Navigation<T>, path: Path<T>): Path<T> {
+    const segments = navigation.path.segments;
+    const i = segments.findIndex(segment => segment.type === "right-panel");
+    let _path = path;
+    if (i !== -1) {
+        _path = path.until("room");
+        _path = _path.with(segments[i])!;
+        _path = _path.with(segments[i + 1])!;
+    }
+    return _path;
+}
+
+export function parseUrlPath(urlPath: string, currentNavPath: Path<SegmentType>, defaultSessionId?: string): Segment<SegmentType>[] {
+    // substring(1) to take of initial /
+    const parts = urlPath.substring(1).split("/");
+    const iterator = parts[Symbol.iterator]();
+    const segments: Segment<SegmentType>[] = [];
+    let next; 
+    while (!(next = iterator.next()).done) {
+        const type = next.value;
+        if (type === "rooms") {
+            const roomsValue = iterator.next().value;
+            if (roomsValue === undefined) { break; }
+            const roomIds = roomsValue.split(",");
+            segments.push(new Segment(type, roomIds));
+            const selectedIndex = parseInt(iterator.next().value || "0", 10);
+            const roomId = roomIds[selectedIndex];
+            if (roomId) {
+                segments.push(new Segment("room", roomId));
+            } else {
+                segments.push(new Segment("empty-grid-tile", selectedIndex));
+            }
+        } else if (type === "open-room") {
+            const roomId = iterator.next().value;
+            if (!roomId) { break; }
+            const rooms = currentNavPath.get("rooms");
+            if (rooms) {
+                segments.push(roomsSegmentWithRoom(rooms, roomId, currentNavPath));
+            }
+            segments.push(new Segment("room", roomId));
+            const openRoomPartIndex = parts.findIndex(part => part === "open-room");
+            const hasOnlyRoomIdAfterPart = openRoomPartIndex >= parts.length - 2;
+            if (hasOnlyRoomIdAfterPart) {
+                // Copy right-panel segments from previous path only if there are no other parts after open-room
+                // fixes memberlist -> member details closing/opening grid view
+                const previousSegments = currentNavPath.segments;
+                const i = previousSegments.findIndex(s => s.type === "right-panel");
+                if (i !== -1) {
+                    segments.push(...previousSegments.slice(i));
+                }
+            }
+        } else if (type === "last-session") {
+            let sessionSegment = currentNavPath.get("session");
+            if (typeof sessionSegment?.value !== "string" && defaultSessionId) {
+                sessionSegment = new Segment("session", defaultSessionId);
+            }
+            if (sessionSegment) {
+                segments.push(sessionSegment);
+            }
+        } else if (type === "details" || type === "members") {
+            pushRightPanelSegment(segments, type);
+        } else if (type === "member") {
+            const userId = iterator.next().value;
+            if (!userId) { break; }
+            pushRightPanelSegment(segments, type, userId);
+        } else if (type.includes("loginToken")) {
+            // Special case for SSO-login with query parameter loginToken=<token>
+            const loginToken = type.split("=").pop();
+            segments.push(new Segment("sso", loginToken));
+        } else {
+            // might be undefined, which will be turned into true by Segment 
+            const value = iterator.next().value;
+            segments.push(new Segment(type, value));
+        }
+    }
+    return segments;
+}
+
+export function stringifyPath(path: Path<SegmentType>): string {
+    let urlPath = "";
+    let prevSegment: Segment<SegmentType> | undefined;
+    for (const segment of path.segments) {
+        switch (segment.type) {
+            case "rooms":
+                urlPath += `/rooms/${segment.value.join(",")}`;
+                break;
+            case "empty-grid-tile":
+                urlPath += `/${segment.value}`;
+                break;
+            case "room":
+                if (prevSegment?.type === "rooms") {
+                    const index = prevSegment.value.indexOf(segment.value);
+                    urlPath += `/${index}`;
+                } else {
+                    urlPath += `/${segment.type}/${segment.value}`;
+                }
+                break;
+            case "right-panel":
+            case "sso":
+                // Do not put these segments in URL
+                continue;
+            default:
+                urlPath += `/${segment.type}`;
+                if (segment.value && segment.value !== true) {
+                    urlPath += `/${segment.value}`;
+                }
+        }
+        prevSegment = segment;
+    }
+    return urlPath;
+}
+
+export function tests() {
+    function createEmptyPath() {
+        const nav: Navigation<SegmentType> = new Navigation(allowsChild);
+        const path = nav.pathFrom([]);
+        return path;
+    }
+
+    return {
+        "stringify grid url with focused empty tile": assert => {
+            const nav: Navigation<SegmentType> = new Navigation(allowsChild);
+            const path = nav.pathFrom([
+                new Segment("session", 1),
+                new Segment("rooms", ["a", "b", "c"]),
+                new Segment("empty-grid-tile", 3)
+            ]);
+            const urlPath = stringifyPath(path);
+            assert.equal(urlPath, "/session/1/rooms/a,b,c/3");
+        },
+        "stringify grid url with focused room": assert => {
+            const nav: Navigation<SegmentType> = new Navigation(allowsChild);
+            const path = nav.pathFrom([
+                new Segment("session", 1),
+                new Segment("rooms", ["a", "b", "c"]),
+                new Segment("room", "b")
+            ]);
+            const urlPath = stringifyPath(path);
+            assert.equal(urlPath, "/session/1/rooms/a,b,c/1");
+        },
+        "stringify url with right-panel and details segment": assert => {
+            const nav: Navigation<SegmentType> = new Navigation(allowsChild);
+            const path = nav.pathFrom([
+                new Segment("session", 1),
+                new Segment("rooms", ["a", "b", "c"]),
+                new Segment("room", "b"),
+                new Segment("right-panel"),
+                new Segment("details")
+            ]);
+            const urlPath = stringifyPath(path);
+            assert.equal(urlPath, "/session/1/rooms/a,b,c/1/details");
+        },
+        "Parse loginToken query parameter into SSO segment": assert => {
+            const path = createEmptyPath();
+            const segments = parseUrlPath("?loginToken=a1232aSD123", path);
+            assert.equal(segments.length, 1);
+            assert.equal(segments[0].type, "sso");
+            assert.equal(segments[0].value, "a1232aSD123");
+        },
+        "parse grid url path with focused empty tile": assert => {
+            const path = createEmptyPath();
+            const segments = parseUrlPath("/session/1/rooms/a,b,c/3", path);
+            assert.equal(segments.length, 3);
+            assert.equal(segments[0].type, "session");
+            assert.equal(segments[0].value, "1");
+            assert.equal(segments[1].type, "rooms");
+            assert.deepEqual(segments[1].value, ["a", "b", "c"]);
+            assert.equal(segments[2].type, "empty-grid-tile");
+            assert.equal(segments[2].value, 3);
+        },
+        "parse grid url path with focused room": assert => {
+            const path = createEmptyPath();
+            const segments = parseUrlPath("/session/1/rooms/a,b,c/1", path);
+            assert.equal(segments.length, 3);
+            assert.equal(segments[0].type, "session");
+            assert.equal(segments[0].value, "1");
+            assert.equal(segments[1].type, "rooms");
+            assert.deepEqual(segments[1].value, ["a", "b", "c"]);
+            assert.equal(segments[2].type, "room");
+            assert.equal(segments[2].value, "b");
+        },
+        "parse empty grid url": assert => {
+            const path = createEmptyPath();
+            const segments = parseUrlPath("/session/1/rooms/", path);
+            assert.equal(segments.length, 3);
+            assert.equal(segments[0].type, "session");
+            assert.equal(segments[0].value, "1");
+            assert.equal(segments[1].type, "rooms");
+            assert.deepEqual(segments[1].value, [""]);
+            assert.equal(segments[2].type, "empty-grid-tile");
+            assert.equal(segments[2].value, 0);
+        },
+        "parse empty grid url with focus": assert => {
+            const path = createEmptyPath();
+            const segments = parseUrlPath("/session/1/rooms//1", path);
+            assert.equal(segments.length, 3);
+            assert.equal(segments[0].type, "session");
+            assert.equal(segments[0].value, "1");
+            assert.equal(segments[1].type, "rooms");
+            assert.deepEqual(segments[1].value, [""]);
+            assert.equal(segments[2].type, "empty-grid-tile");
+            assert.equal(segments[2].value, 1);
+        },
+        "parse open-room action replacing the current focused room": assert => {
+            const nav: Navigation<SegmentType> = new Navigation(allowsChild);
+            const path = nav.pathFrom([
+                new Segment("session", 1),
+                new Segment("rooms", ["a", "b", "c"]),
+                new Segment("room", "b")
+            ]);
+            const segments = parseUrlPath("/session/1/open-room/d", path);
+            assert.equal(segments.length, 3);
+            assert.equal(segments[0].type, "session");
+            assert.equal(segments[0].value, "1");
+            assert.equal(segments[1].type, "rooms");
+            assert.deepEqual(segments[1].value, ["a", "d", "c"]);
+            assert.equal(segments[2].type, "room");
+            assert.equal(segments[2].value, "d");
+        },
+        "parse open-room action changing focus to an existing room": assert => {
+            const nav: Navigation<SegmentType> = new Navigation(allowsChild);
+            const path = nav.pathFrom([
+                new Segment("session", 1),
+                new Segment("rooms", ["a", "b", "c"]),
+                new Segment("room", "b")
+            ]);
+            const segments = parseUrlPath("/session/1/open-room/a", path);
+            assert.equal(segments.length, 3);
+            assert.equal(segments[0].type, "session");
+            assert.equal(segments[0].value, "1");
+            assert.equal(segments[1].type, "rooms");
+            assert.deepEqual(segments[1].value, ["a", "b", "c"]);
+            assert.equal(segments[2].type, "room");
+            assert.equal(segments[2].value, "a");
+        },
+        "parse open-room action changing focus to an existing room with details open": assert => {
+            const nav: Navigation<SegmentType> = new Navigation(allowsChild);
+            const path = nav.pathFrom([
+                new Segment("session", 1),
+                new Segment("rooms", ["a", "b", "c"]),
+                new Segment("room", "b"),
+                new Segment("right-panel", true),
+                new Segment("details", true)
+            ]);
+            const segments = parseUrlPath("/session/1/open-room/a", path);
+            assert.equal(segments.length, 5);
+            assert.equal(segments[0].type, "session");
+            assert.equal(segments[0].value, "1");
+            assert.equal(segments[1].type, "rooms");
+            assert.deepEqual(segments[1].value, ["a", "b", "c"]);
+            assert.equal(segments[2].type, "room");
+            assert.equal(segments[2].value, "a");
+            assert.equal(segments[3].type, "right-panel");
+            assert.equal(segments[3].value, true);
+            assert.equal(segments[4].type, "details");
+            assert.equal(segments[4].value, true);
+        },
+        "open-room action should only copy over previous segments if there are no parts after open-room": assert => {
+            const nav: Navigation<SegmentType> = new Navigation(allowsChild);
+            const path = nav.pathFrom([
+                new Segment("session", 1),
+                new Segment("rooms", ["a", "b", "c"]),
+                new Segment("room", "b"),
+                new Segment("right-panel", true),
+                new Segment("members", true)
+            ]);
+            const segments = parseUrlPath("/session/1/open-room/a/member/foo", path);
+            assert.equal(segments.length, 5);
+            assert.equal(segments[0].type, "session");
+            assert.equal(segments[0].value, "1");
+            assert.equal(segments[1].type, "rooms");
+            assert.deepEqual(segments[1].value, ["a", "b", "c"]);
+            assert.equal(segments[2].type, "room");
+            assert.equal(segments[2].value, "a");
+            assert.equal(segments[3].type, "right-panel");
+            assert.equal(segments[3].value, true);
+            assert.equal(segments[4].type, "member");
+            assert.equal(segments[4].value, "foo");
+        },
+        "parse open-room action setting a room in an empty tile": assert => {
+            const nav: Navigation<SegmentType> = new Navigation(allowsChild);
+            const path = nav.pathFrom([
+                new Segment("session", 1),
+                new Segment("rooms", ["a", "b", "c"]),
+                new Segment("empty-grid-tile", 4)
+            ]);
+            const segments = parseUrlPath("/session/1/open-room/d", path);
+            assert.equal(segments.length, 3);
+            assert.equal(segments[0].type, "session");
+            assert.equal(segments[0].value, "1");
+            assert.equal(segments[1].type, "rooms");
+            assert.deepEqual(segments[1].value, ["a", "b", "c", , "d"]); //eslint-disable-line no-sparse-arrays
+            assert.equal(segments[2].type, "room");
+            assert.equal(segments[2].value, "d");
+        },
+        "parse session url path without id": assert => {
+            const path = createEmptyPath();
+            const segments = parseUrlPath("/session", path);
+            assert.equal(segments.length, 1);
+            assert.equal(segments[0].type, "session");
+            assert.strictEqual(segments[0].value, true);
+        },
+        "remove active room from grid path turns it into empty tile": assert => {
+            const nav: Navigation<SegmentType> = new Navigation(allowsChild);
+            const path = nav.pathFrom([
+                new Segment("session", 1),
+                new Segment("rooms", ["a", "b", "c"]),
+                new Segment("room", "b")
+            ]);
+            const newPath = removeRoomFromPath(path, "b");
+            assert.equal(newPath?.segments.length, 3);
+            assert.equal(newPath?.segments[0].type, "session");
+            assert.equal(newPath?.segments[0].value, 1);
+            assert.equal(newPath?.segments[1].type, "rooms");
+            assert.deepEqual(newPath?.segments[1].value, ["a", "", "c"]);
+            assert.equal(newPath?.segments[2].type, "empty-grid-tile");
+            assert.equal(newPath?.segments[2].value, 1);
+        },
+        "remove inactive room from grid path": assert => {
+            const nav: Navigation<SegmentType> = new Navigation(allowsChild);
+            const path = nav.pathFrom([
+                new Segment("session", 1),
+                new Segment("rooms", ["a", "b", "c"]),
+                new Segment("room", "b")
+            ]);
+            const newPath = removeRoomFromPath(path, "a");
+            assert.equal(newPath?.segments.length, 3);
+            assert.equal(newPath?.segments[0].type, "session");
+            assert.equal(newPath?.segments[0].value, 1);
+            assert.equal(newPath?.segments[1].type, "rooms");
+            assert.deepEqual(newPath?.segments[1].value, ["", "b", "c"]);
+            assert.equal(newPath?.segments[2].type, "room");
+            assert.equal(newPath?.segments[2].value, "b");
+        },
+        "remove inactive room from grid path with empty tile": assert => {
+            const nav: Navigation<SegmentType> = new Navigation(allowsChild);
+            const path = nav.pathFrom([
+                new Segment("session", 1),
+                new Segment("rooms", ["a", "b", ""]),
+                new Segment("empty-grid-tile", 3)
+            ]);
+            const newPath = removeRoomFromPath(path, "b");
+            assert.equal(newPath?.segments.length, 3);
+            assert.equal(newPath?.segments[0].type, "session");
+            assert.equal(newPath?.segments[0].value, 1);
+            assert.equal(newPath?.segments[1].type, "rooms");
+            assert.deepEqual(newPath?.segments[1].value, ["a", "", ""]);
+            assert.equal(newPath?.segments[2].type, "empty-grid-tile");
+            assert.equal(newPath?.segments[2].value, 3);
+        },
+        "remove active room": assert => {
+            const nav: Navigation<SegmentType> = new Navigation(allowsChild);
+            const path = nav.pathFrom([
+                new Segment("session", 1),
+                new Segment("room", "b")
+            ]);
+            const newPath = removeRoomFromPath(path, "b");
+            assert.equal(newPath?.segments.length, 1);
+            assert.equal(newPath?.segments[0].type, "session");
+            assert.equal(newPath?.segments[0].value, 1);
+        },
+        "remove inactive room doesn't do anything": assert => {
+            const nav: Navigation<SegmentType> = new Navigation(allowsChild);
+            const path = nav.pathFrom([
+                new Segment("session", 1),
+                new Segment("room", "b")
+            ]);
+            const newPath = removeRoomFromPath(path, "a");
+            assert.equal(newPath?.segments.length, 2);
+            assert.equal(newPath?.segments[0].type, "session");
+            assert.equal(newPath?.segments[0].value, 1);
+            assert.equal(newPath?.segments[1].type, "room");
+            assert.equal(newPath?.segments[1].value, "b");
+        },
+        
+    }
+}

src/domain/rageshake.ts

@@ -0,0 +1,65 @@
+/*
+Copyright 2022 The Matrix.org Foundation C.I.C.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+import type {BlobHandle} from "../platform/web/dom/BlobHandle";
+import type {RequestFunction} from "../platform/types/types";
+
+// see https://github.com/matrix-org/rageshake#readme
+type RageshakeData = {
+    // A textual description of the problem. Included in the details.log.gz file.
+    text: string | undefined;
+    // Application user-agent. Included in the details.log.gz file.
+    userAgent: string;
+    // Identifier for the application (eg 'riot-web'). Should correspond to a mapping configured in the configuration file for github issue reporting to work.
+    app: string;
+    // Application version. Included in the details.log.gz file.
+    version: string;
+    // Label to attach to the github issue, and include in the details file.
+    label: string | undefined;
+};
+
+export async function submitLogsToRageshakeServer(data: RageshakeData, logsBlob: BlobHandle, submitUrl: string, request: RequestFunction): Promise<void> {
+    const formData = new Map<string, string | {name: string, blob: BlobHandle}>();
+    if (data.text) {
+        formData.set("text", data.text);
+    }
+    formData.set("user_agent", data.userAgent);
+    formData.set("app", data.app);
+    formData.set("version", data.version);
+    if (data.label) {
+        formData.set("label", data.label);
+    }
+    formData.set("file", {name: "logs.json", blob: logsBlob});
+    const headers: Map<string, string> = new Map();
+    headers.set("Accept", "application/json");
+    const result = request(submitUrl, {
+        method: "POST",
+        body: formData,
+        headers
+    });
+    let response;
+    try {
+        response = await result.response();
+    } catch (err) {
+        throw new Error(`Could not submit logs to ${submitUrl}, got error ${err.message}`);
+    }
+    const {status, body} = response;
+    if (status < 200 || status >= 300) {
+        throw new Error(`Could not submit logs to ${submitUrl}, got status code ${status} with body ${body}`);
+    }
+    // we don't bother with reading report_url from the body as the rageshake server doesn't always return it
+    // and would have to have CORS setup properly for us to be able to read it.
+}

src/domain/session/CreateRoomViewModel.js

@@ -0,0 +1,144 @@
+/*
+Copyright 2020 The Matrix.org Foundation C.I.C.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+import {ViewModel} from "../ViewModel";
+import {imageToInfo} from "./common.js";
+import {RoomType} from "../../matrix/room/common";
+
+export class CreateRoomViewModel extends ViewModel {
+    constructor(options) {
+        super(options);
+        const {session} = options;
+        this._session = session;
+        this._name = undefined;
+        this._topic = undefined;
+        this._roomAlias = undefined;
+        this._isPublic = false;
+        this._isEncrypted = true;
+        this._isAdvancedShown = false;
+        this._isFederationDisabled = false;
+        this._avatarScaledBlob = undefined;
+        this._avatarFileName = undefined;
+        this._avatarInfo = undefined;
+    }
+
+    get isPublic() { return this._isPublic; }
+    get isEncrypted() { return this._isEncrypted; }
+    get canCreate() { return !!this._name; }
+    avatarUrl() { return this._avatarScaledBlob.url; }
+    get avatarTitle() { return this._name; }
+    get avatarLetter() { return ""; }
+    get avatarColorNumber() { return 0; }
+    get hasAvatar() { return !!this._avatarScaledBlob; }
+    get isFederationDisabled() { return this._isFederationDisabled; }
+    get isAdvancedShown() { return this._isAdvancedShown; }
+
+    setName(name) {
+        this._name = name;
+        this.emitChange("canCreate");
+    }
+
+    setRoomAlias(roomAlias) {
+        this._roomAlias = roomAlias;
+    }
+
+    setTopic(topic) {
+        this._topic = topic;
+    }
+
+    setPublic(isPublic) {
+        this._isPublic = isPublic;
+        this.emitChange("isPublic");
+    }
+
+    setEncrypted(isEncrypted) {
+        this._isEncrypted = isEncrypted;
+        this.emitChange("isEncrypted");
+    }
+
+    setFederationDisabled(disable) {
+        this._isFederationDisabled = disable;
+        this.emitChange("isFederationDisabled");
+    }
+
+    toggleAdvancedShown() {
+        this._isAdvancedShown = !this._isAdvancedShown;
+        this.emitChange("isAdvancedShown");
+    }
+
+    create() {
+        let avatar;
+        if (this._avatarScaledBlob) {
+            avatar = {
+                info: this._avatarInfo,
+                name: this._avatarFileName,
+                blob: this._avatarScaledBlob
+            }
+        }
+        const roomBeingCreated = this._session.createRoom({
+            type: this.isPublic ? RoomType.Public : RoomType.Private,
+            name: this._name ?? undefined,
+            topic: this._topic ?? undefined,
+            isEncrypted: !this.isPublic && this._isEncrypted,
+            isFederationDisabled: this._isFederationDisabled,
+            alias: this.isPublic ? ensureAliasIsLocalPart(this._roomAlias) : undefined,
+            avatar,
+        });
+        this.navigation.push("room", roomBeingCreated.id);
+    }
+
+    async selectAvatar() {
+        if (!this.platform.hasReadPixelPermission()) {
+            alert("Please allow canvas image data access, so we can scale your images down.");
+            return;
+        }
+        if (this._avatarScaledBlob) {
+            this._avatarScaledBlob.dispose();
+        }
+        this._avatarScaledBlob = undefined;
+        this._avatarFileName = undefined;
+        this._avatarInfo = undefined;
+
+        const file = await this.platform.openFile("image/*");
+        if (!file || !file.blob.mimeType.startsWith("image/")) {
+            // allow to clear the avatar by not selecting an image
+            this.emitChange("hasAvatar");
+            return;
+        }
+        let image = await this.platform.loadImage(file.blob);
+        const limit = 800;
+        if (image.maxDimension > limit) {
+            const scaledImage = await image.scale(limit);
+            image.dispose();
+            image = scaledImage;
+        }
+        this._avatarScaledBlob = image.blob;
+        this._avatarInfo = imageToInfo(image);
+        this._avatarFileName = file.name;
+        this.emitChange("hasAvatar");
+    }
+}
+
+function ensureAliasIsLocalPart(roomAliasLocalPart) {
+    if (roomAliasLocalPart.startsWith("#")) {
+        roomAliasLocalPart = roomAliasLocalPart.substr(1);
+    }
+    const colonIdx = roomAliasLocalPart.indexOf(":");
+    if (colonIdx !== -1) {
+        roomAliasLocalPart = roomAliasLocalPart.substr(0, colonIdx);
+    }
+    return roomAliasLocalPart;
+}

src/domain/session/RoomGridViewModel.js

@@ -14,7 +14,8 @@ See the License for the specific language governing permissions and
 limitations under the License.
 */
 
-import {ViewModel} from "../ViewModel.js";
+import {ViewModel} from "../ViewModel";
+import {addPanelIfNeeded} from "../navigation/index";
 
 function dedupeSparse(roomIds) {
     return roomIds.map((id, idx) => {
@@ -32,10 +33,9 @@ export class RoomGridViewModel extends ViewModel {
 
         this._width = options.width;
         this._height = options.height;
-        this._createRoomViewModel = options.createRoomViewModel;
-
+        this._createRoomViewModelObservable = options.createRoomViewModelObservable;
         this._selectedIndex = 0;
-        this._viewModels = [];
+        this._viewModelsObservables = [];
         this._setupNavigation();
     }
 
@@ -54,9 +54,9 @@ export class RoomGridViewModel extends ViewModel {
         this.track(focusedRoom.subscribe(roomId => {
             if (roomId) {
                 // as the room will be in the "rooms" observable
-                // (monitored by the parent vm) as well,
+                // (monitored by the parent vmo) as well,
                 // we only change the focus here and trust
-                // setRoomIds to have created the vm already
+                // setRoomIds to have created the vmo already
                 this._setFocusRoom(roomId);
             }
         }));
@@ -64,7 +64,7 @@ export class RoomGridViewModel extends ViewModel {
     }
 
     roomViewModelAt(i) {
-        return this._viewModels[i];
+        return this._viewModelsObservables[i]?.get();
     }
 
     get focusIndex() {
@@ -79,13 +79,20 @@ export class RoomGridViewModel extends ViewModel {
         return this._height;
     }
 
+    _switchToRoom(roomId) {
+        let path = this.navigation.path.until("rooms");
+        path = path.with(this.navigation.segment("room", roomId));
+        path = addPanelIfNeeded(this.navigation, path);
+        this.navigation.applyPath(path);
+    }
+
     focusTile(index) {
         if (index === this._selectedIndex) {
             return;
         }
-        const vm = this._viewModels[index];
-        if (vm) {
-            this.navigation.push("room", vm.id);
+        const vmo = this._viewModelsObservables[index];
+        if (vmo) {
+            this._switchToRoom(vmo.id);
         } else {
             this.navigation.push("empty-grid-tile", index);
         }
@@ -98,7 +105,8 @@ export class RoomGridViewModel extends ViewModel {
         if (existingRoomVM) {
             const index = roomIds.indexOf(existingRoomVM.id);
             if (index !== -1) {
-                this._viewModels[index] = this.track(existingRoomVM);
+                this._viewModelsObservables[index] = this.track(existingRoomVM);
+                existingRoomVM.subscribe(viewModel => this._refreshRoomViewModel(viewModel));
                 transfered = true;
             }
         }
@@ -106,7 +114,7 @@ export class RoomGridViewModel extends ViewModel {
         // now all view models exist, set the focus to the selected room
         const focusedRoom = this.navigation.path.get("room");
         if (focusedRoom) {
-            const index = this._viewModels.findIndex(vm => vm && vm.id === focusedRoom.value);
+            const index = this._viewModelsObservables.findIndex(vmo => vmo && vmo.id === focusedRoom.value);
             if (index !== -1) {
                 this._selectedIndex = index;
             }
@@ -121,17 +129,17 @@ export class RoomGridViewModel extends ViewModel {
         const len = this._height * this._width;
         for (let i = 0; i < len; i += 1) {
             const newId = roomIds[i];
-            const vm = this._viewModels[i];
+            const vmo = this._viewModelsObservables[i];
             // did anything change?
-            if ((!vm && newId) || (vm && vm.id !== newId)) {
-                if (vm) {
-                    this._viewModels[i] = this.disposeTracked(vm);
+            if ((!vmo && newId) || (vmo && vmo.id !== newId)) {
+                if (vmo) {
+                    this._viewModelsObservables[i] = this.disposeTracked(vmo);
                 }
                 if (newId) {
-                    const newVM = this._createRoomViewModel(newId);
-                    if (newVM) {
-                        this._viewModels[i] = this.track(newVM);
-                    }
+                    const vmo = this._createRoomViewModelObservable(newId);
+                    this._viewModelsObservables[i] = this.track(vmo);
+                    vmo.subscribe(viewModel => this._refreshRoomViewModel(viewModel));
+                    vmo.initialize();
                 }
                 changed = true;
             }
@@ -142,14 +150,20 @@ export class RoomGridViewModel extends ViewModel {
         return changed;
     }
 
+    _refreshRoomViewModel(viewModel) {
+        this.emitChange();
+        viewModel?.focus();
+    }
+
     /** called from SessionViewModel */
     releaseRoomViewModel(roomId) {
-        const index = this._viewModels.findIndex(vm => vm && vm.id === roomId);
+        const index = this._viewModelsObservables.findIndex(vmo => vmo && vmo.id === roomId);
         if (index !== -1) {
-            const vm = this._viewModels[index];
-            this.untrack(vm);
-            this._viewModels[index] = null;
-            return vm;
+            const vmo = this._viewModelsObservables[index];
+            this.untrack(vmo);
+            vmo.unsubscribeAll();
+            this._viewModelsObservables[index] = null;
+            return vmo;
         }
     }
 
@@ -158,20 +172,22 @@ export class RoomGridViewModel extends ViewModel {
             return;
         }
         this._selectedIndex = idx;
-        const vm = this._viewModels[this._selectedIndex];
-        vm?.focus();
+        const vmo = this._viewModelsObservables[this._selectedIndex];
+        vmo?.get()?.focus();
         this.emitChange("focusIndex");
     }
 
     _setFocusRoom(roomId) {
-        const index = this._viewModels.findIndex(vm => vm?.id === roomId);
+        const index = this._viewModelsObservables.findIndex(vmo => vmo?.id === roomId);
         if (index >= 0) {
             this._setFocusIndex(index);
         }
     }
 }
 
-import {createNavigation} from "../navigation/index.js";
+import {createNavigation} from "../navigation/index";
+import {ObservableValue} from "../../observable/ObservableValue";
+
 export function tests() { 
     class RoomVMMock {
         constructor(id) {
@@ -187,6 +203,12 @@ export function tests() {
         }
     }
 
+    class RoomViewModelObservableMock extends ObservableValue {
+        async initialize() {}
+        dispose() { this.get()?.dispose(); }
+        get id() { return this.get()?.id; }
+    }
+
     function createNavigationForRoom(rooms, room) {
         const navigation = createNavigation();
         navigation.applyPath(navigation.pathFrom([
@@ -211,7 +233,7 @@ export function tests() {
         "initialize with duplicate set of rooms": assert => {
             const navigation = createNavigationForRoom(["c", "a", "b", undefined, "a"], "a");
             const gridVM = new RoomGridViewModel({
-                createRoomViewModel: id => new RoomVMMock(id),
+                createRoomViewModelObservable: id => new RoomViewModelObservableMock(new RoomVMMock(id)),
                 navigation,
                 width: 3,
                 height: 2,
@@ -228,12 +250,12 @@ export function tests() {
         "transfer room view model": assert => {
             const navigation = createNavigationForRoom(["a"], "a");
             const gridVM = new RoomGridViewModel({
-                createRoomViewModel: () => assert.fail("no vms should be created"),
+                createRoomViewModelObservable: () => assert.fail("no vms should be created"),
                 navigation,
                 width: 3,
                 height: 2,
             });
-            const existingRoomVM = new RoomVMMock("a");
+            const existingRoomVM = new RoomViewModelObservableMock(new RoomVMMock("a"));
             const transfered = gridVM.initializeRoomIdsAndTransferVM(navigation.path.get("rooms").value, existingRoomVM);
             assert.equal(transfered, true);
             assert.equal(gridVM.focusIndex, 0);
@@ -242,12 +264,12 @@ export function tests() {
         "reject transfer for non-matching room view model": assert => {
             const navigation = createNavigationForRoom(["a"], "a");
             const gridVM = new RoomGridViewModel({
-                createRoomViewModel: id => new RoomVMMock(id),
+                createRoomViewModelObservable: id => new RoomViewModelObservableMock(new RoomVMMock(id)),
                 navigation,
                 width: 3,
                 height: 2,
             });
-            const existingRoomVM = new RoomVMMock("f");
+            const existingRoomVM = new RoomViewModelObservableMock(new RoomVMMock("f"));
             const transfered = gridVM.initializeRoomIdsAndTransferVM(navigation.path.get("rooms").value, existingRoomVM);
             assert.equal(transfered, false);
             assert.equal(gridVM.focusIndex, 0);
@@ -256,7 +278,7 @@ export function tests() {
         "created & released room view model is not disposed": assert => {
             const navigation = createNavigationForRoom(["a"], "a");
             const gridVM = new RoomGridViewModel({
-                createRoomViewModel: id => new RoomVMMock(id),
+                createRoomViewModelObservable: id => new RoomViewModelObservableMock(new RoomVMMock(id)),
                 navigation,
                 width: 3,
                 height: 2,
@@ -265,27 +287,27 @@ export function tests() {
             assert.equal(transfered, false);
             const releasedVM = gridVM.releaseRoomViewModel("a");
             gridVM.dispose();
-            assert.equal(releasedVM.disposed, false);
+            assert.equal(releasedVM.get().disposed, false);
         },
         "transfered & released room view model is not disposed": assert => {
             const navigation = createNavigationForRoom([undefined, "a"], "a");
             const gridVM = new RoomGridViewModel({
-                createRoomViewModel: () => assert.fail("no vms should be created"),
+                createRoomViewModelObservable: () => assert.fail("no vms should be created"),
                 navigation,
                 width: 3,
                 height: 2,
             });
-            const existingRoomVM = new RoomVMMock("a");
+            const existingRoomVM = new RoomViewModelObservableMock(new RoomVMMock("a"));
             const transfered = gridVM.initializeRoomIdsAndTransferVM(navigation.path.get("rooms").value, existingRoomVM);
             assert.equal(transfered, true);
             const releasedVM = gridVM.releaseRoomViewModel("a");
             gridVM.dispose();
-            assert.equal(releasedVM.disposed, false);
+            assert.equal(releasedVM.get().disposed, false);
         },
         "try release non-existing room view model is": assert => {
             const navigation = createNavigationForEmptyTile([undefined, "b"], 3);
             const gridVM = new RoomGridViewModel({
-                createRoomViewModel: id => new RoomVMMock(id),
+                createRoomViewModelObservable: id => new RoomViewModelObservableMock(new RoomVMMock(id)),
                 navigation,
                 width: 3,
                 height: 2,
@@ -297,7 +319,7 @@ export function tests() {
         "initial focus is set to empty tile": assert => {
             const navigation = createNavigationForEmptyTile(["a"], 1);
             const gridVM = new RoomGridViewModel({
-                createRoomViewModel: id => new RoomVMMock(id),
+                createRoomViewModelObservable: id => new RoomViewModelObservableMock(new RoomVMMock(id)),
                 navigation,
                 width: 3,
                 height: 2,
@@ -309,7 +331,7 @@ export function tests() {
         "change room ids after creation": assert => {
             const navigation = createNavigationForRoom(["a", "b"], "a");
             const gridVM = new RoomGridViewModel({
-                createRoomViewModel: id => new RoomVMMock(id),
+                createRoomViewModelObservable: id => new RoomViewModelObservableMock(new RoomVMMock(id)),
                 navigation,
                 width: 3,
                 height: 2,

src/domain/session/RoomViewModelObservable.js

@@ -0,0 +1,91 @@
+/*
+Copyright 2021 The Matrix.org Foundation C.I.C.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+import {ObservableValue} from "../../observable/ObservableValue";
+import {RoomStatus} from "../../matrix/room/common";
+
+/**
+Depending on the status of a room (invited, joined, archived, or none),
+we want to show a different view with a different view model
+when showing a room. Furthermore, this logic is needed both in the 
+single room view and in the grid view. So this logic is extracted here,
+and this observable updates with the right view model as the status for
+a room changes.
+
+To not have to track the subscription manually in the SessionViewModel and
+the RoomGridViewModel, all subscriptions are removed in the dispose method.
+Only when transferring a RoomViewModelObservable between the SessionViewModel
+and RoomGridViewModel, unsubscribeAll should be  called prior to doing
+the transfer, so either parent view model don't keep getting updates for
+the now transferred child view model.
+
+This is also why there is an explicit initialize method, see comment there.
+*/
+export class RoomViewModelObservable extends ObservableValue {
+    constructor(sessionViewModel, roomIdOrLocalId) {
+        super(null);
+        this._statusSubscription = null;
+        this._sessionViewModel = sessionViewModel;
+        this.id = roomIdOrLocalId;
+    }
+
+    /**
+    Separate initialize method rather than doing this onSubscribeFirst because 
+    we don't want to run this again when transferring this value between
+    SessionViewModel and RoomGridViewModel, as onUnsubscribeLast and onSubscribeFirst
+    are called in that case.
+    */
+    async initialize() {
+        const {session} = this._sessionViewModel._client;
+        const statusObservable = await session.observeRoomStatus(this.id);
+        this.set(await this._statusToViewModel(statusObservable.get()));
+        this._statusSubscription = statusObservable.subscribe(async status => {
+            // first dispose existing VM, if any
+            this.get()?.dispose();
+            this.set(await this._statusToViewModel(status));
+        });
+    }
+
+    async _statusToViewModel(status) {
+        if (status & RoomStatus.Replaced) {
+            if (status & RoomStatus.BeingCreated) {
+                const {session} = this._sessionViewModel._client;
+                const roomBeingCreated = session.roomsBeingCreated.get(this.id);
+                this._sessionViewModel.notifyRoomReplaced(roomBeingCreated.id, roomBeingCreated.roomId);
+            } else {
+                throw new Error("Don't know how to replace a room with this status: " + (status ^ RoomStatus.Replaced));
+            }
+        } else if (status & RoomStatus.BeingCreated) {
+            return this._sessionViewModel._createRoomBeingCreatedViewModel(this.id);
+        } else if (status & RoomStatus.Invited) {
+            return this._sessionViewModel._createInviteViewModel(this.id);
+        } else if (status & RoomStatus.Joined) {
+            return this._sessionViewModel._createRoomViewModelInstance(this.id);
+        } else if (status & RoomStatus.Archived) {
+            return await this._sessionViewModel._createArchivedRoomViewModel(this.id);
+        } else {
+            return this._sessionViewModel._createUnknownRoomViewModel(this.id);
+        }
+    }
+
+    dispose() {
+        if (this._statusSubscription) {
+            this._statusSubscription = this._statusSubscription();
+        }
+        this.unsubscribeAll();
+        this.get()?.dispose();
+    }
+}

src/domain/session/SessionStatusViewModel.js

@@ -14,9 +14,9 @@ See the License for the specific language governing permissions and
 limitations under the License.
 */
 
-import {ViewModel} from "../ViewModel.js";
-import {createEnum} from "../../utils/enum.js";
-import {ConnectionStatus} from "../../matrix/net/Reconnector.js";
+import {ViewModel} from "../ViewModel";
+import {createEnum} from "../../utils/enum";
+import {ConnectionStatus} from "../../matrix/net/Reconnector";
 import {SyncStatus} from "../../matrix/Sync.js";
 
 const SessionStatus = createEnum(
@@ -36,7 +36,7 @@ export class SessionStatusViewModel extends ViewModel {
         this._reconnector = reconnector;
         this._status = this._calculateState(reconnector.connectionStatus.get(), sync.status.get());
         this._session = session;
-        this._setupSessionBackupUrl = this.urlCreator.urlForSegment("settings");
+        this._setupKeyBackupUrl = this.urlCreator.urlForSegment("settings");
         this._dismissSecretStorage = false;
     }
 
@@ -44,17 +44,17 @@ export class SessionStatusViewModel extends ViewModel {
         const update = () => this._updateStatus();
         this.track(this._sync.status.subscribe(update));
         this.track(this._reconnector.connectionStatus.subscribe(update));
-        this.track(this._session.needsSessionBackup.subscribe(() => {
+        this.track(this._session.needsKeyBackup.subscribe(() => {
             this.emitChange();
         }));
     }
 
-    get setupSessionBackupUrl () {
-        return this._setupSessionBackupUrl;
+    get setupKeyBackupUrl () {
+        return this._setupKeyBackupUrl;
     }
 
     get isShown() {
-        return (this._session.needsSessionBackup.get() && !this._dismissSecretStorage) || this._status !== SessionStatus.Syncing;
+        return (this._session.needsKeyBackup.get() && !this._dismissSecretStorage) || this._status !== SessionStatus.Syncing;
     }
 
     get statusLabel() {
@@ -70,7 +70,7 @@ export class SessionStatusViewModel extends ViewModel {
             case SessionStatus.SyncError:
                 return this.i18n`Sync failed because of ${this._sync.error}`;
         }
-        if (this._session.needsSessionBackup.get()) {
+        if (this._session.needsKeyBackup.get()) {
             return this.i18n`Set up session backup to decrypt older messages.`;
         }
         return "";
@@ -135,7 +135,7 @@ export class SessionStatusViewModel extends ViewModel {
 
     get isSecretStorageShown() {
         // TODO: we need a model here where we can have multiple messages queued up and their buttons don't bleed into each other.
-        return this._status === SessionStatus.Syncing && this._session.needsSessionBackup.get() && !this._dismissSecretStorage;
+        return this._status === SessionStatus.Syncing && this._session.needsKeyBackup.get() && !this._dismissSecretStorage;
     }
 
     get canDismiss() {

src/domain/session/SessionViewModel.js

@@ -17,28 +17,33 @@ limitations under the License.
 
 import {LeftPanelViewModel} from "./leftpanel/LeftPanelViewModel.js";
 import {RoomViewModel} from "./room/RoomViewModel.js";
+import {UnknownRoomViewModel} from "./room/UnknownRoomViewModel.js";
+import {InviteViewModel} from "./room/InviteViewModel.js";
+import {RoomBeingCreatedViewModel} from "./room/RoomBeingCreatedViewModel.js";
 import {LightboxViewModel} from "./room/LightboxViewModel.js";
 import {SessionStatusViewModel} from "./SessionStatusViewModel.js";
 import {RoomGridViewModel} from "./RoomGridViewModel.js";
 import {SettingsViewModel} from "./settings/SettingsViewModel.js";
-import {ViewModel} from "../ViewModel.js";
+import {CreateRoomViewModel} from "./CreateRoomViewModel.js";
+import {ViewModel} from "../ViewModel";
+import {RoomViewModelObservable} from "./RoomViewModelObservable.js";
+import {RightPanelViewModel} from "./rightpanel/RightPanelViewModel.js";
 
 export class SessionViewModel extends ViewModel {
     constructor(options) {
         super(options);
-        const {sessionContainer} = options;
-        this._sessionContainer = this.track(sessionContainer);
+        const {client} = options;
+        this._client = this.track(client);
         this._sessionStatusViewModel = this.track(new SessionStatusViewModel(this.childOptions({
-            sync: sessionContainer.sync,
-            reconnector: sessionContainer.reconnector,
-            session: sessionContainer.session,
-        })));
-        this._leftPanelViewModel = this.track(new LeftPanelViewModel(this.childOptions({
-            rooms: this._sessionContainer.session.rooms
+            sync: client.sync,
+            reconnector: client.reconnector,
+            session: client.session,
         })));
+        this._leftPanelViewModel = this.track(new LeftPanelViewModel(this.childOptions({session: this._client.session})));
         this._settingsViewModel = null;
-        this._currentRoomViewModel = null;
+        this._roomViewModelObservable = null;
         this._gridViewModel = null;
+        this._createRoomViewModel = null;
         this._setupNavigation();
     }
 
@@ -58,6 +63,7 @@ export class SessionViewModel extends ViewModel {
             if (!this._gridViewModel) {
                 this._updateRoom(roomId);
             }
+            this._updateRightPanel();
         }));
         if (!this._gridViewModel) {
             this._updateRoom(currentRoomId.get());
@@ -69,30 +75,34 @@ export class SessionViewModel extends ViewModel {
         }));
         this._updateSettings(settings.get());
 
+        const createRoom = this.navigation.observe("create-room");
+        this.track(createRoom.subscribe(createRoomOpen => {
+            this._updateCreateRoom(createRoomOpen);
+        }));
+        this._updateCreateRoom(createRoom.get());
+
         const lightbox = this.navigation.observe("lightbox");
         this.track(lightbox.subscribe(eventId => {
             this._updateLightbox(eventId);
         }));
         this._updateLightbox(lightbox.get());
+
+
+        const rightpanel = this.navigation.observe("right-panel");
+        this.track(rightpanel.subscribe(() => this._updateRightPanel()));
+        this._updateRightPanel();
     }
 
     get id() {
-        return this._sessionContainer.sessionId;
+        return this._client.sessionId;
     }
 
     start() {
         this._sessionStatusViewModel.start();
     }
 
-    get activeSection() {
-        if (this._currentRoomViewModel) {
-            return this._currentRoomViewModel.id;
-        } else if (this._gridViewModel) {
-            return "roomgrid";
-        } else if (this._settingsViewModel) {
-            return "settings";
-        }
-        return "placeholder";
+    get activeMiddleViewModel() {
+        return this._roomViewModelObservable?.get() || this._gridViewModel || this._settingsViewModel || this._createRoomViewModel;
     }
 
     get roomGridViewModel() {
@@ -111,12 +121,16 @@ export class SessionViewModel extends ViewModel {
         return this._settingsViewModel;
     }
 
-    get roomList() {
-        return this._roomList;
+    get currentRoomViewModel() {
+        return this._roomViewModelObservable?.get();
     }
 
-    get currentRoomViewModel() {
-        return this._currentRoomViewModel;
+    get rightPanelViewModel() {
+        return this._rightPanelViewModel;
+    }
+
+    get createRoomViewModel() {
+        return this._createRoomViewModel;
     }
 
     _updateGrid(roomIds) {
@@ -127,66 +141,107 @@ export class SessionViewModel extends ViewModel {
                 this._gridViewModel = this.track(new RoomGridViewModel(this.childOptions({
                     width: 3,
                     height: 2,
-                    createRoomViewModel: roomId => this._createRoomViewModel(roomId),
+                    createRoomViewModelObservable: roomId => new RoomViewModelObservable(this, roomId),
                 })));
-                if (this._gridViewModel.initializeRoomIdsAndTransferVM(roomIds, this._currentRoomViewModel)) {
-                    this._currentRoomViewModel = this.untrack(this._currentRoomViewModel);
-                } else if (this._currentRoomViewModel) {
-                    this._currentRoomViewModel = this.disposeTracked(this._currentRoomViewModel);
+                // try to transfer the current room view model, so we don't have to reload the timeline
+                this._roomViewModelObservable?.unsubscribeAll();
+                if (this._gridViewModel.initializeRoomIdsAndTransferVM(roomIds, this._roomViewModelObservable)) {
+                    this._roomViewModelObservable = this.untrack(this._roomViewModelObservable);
+                } else if (this._roomViewModelObservable) {
+                    this._roomViewModelObservable = this.disposeTracked(this._roomViewModelObservable);
                 }
             } else {
                 this._gridViewModel.setRoomIds(roomIds);
             }
         } else if (this._gridViewModel && !roomIds) {
+            // closing grid, try to show focused room in grid
             if (currentRoomId) {
-                const vm = this._gridViewModel.releaseRoomViewModel(currentRoomId.value);
-                if (vm) {
-                    this._currentRoomViewModel = this.track(vm);
-                } else {
-                    const newVM = this._createRoomViewModel(currentRoomId.value);
-                    if (newVM) {
-                        this._currentRoomViewModel = this.track(newVM);
-                    }
+                const vmo = this._gridViewModel.releaseRoomViewModel(currentRoomId.value);
+                if (vmo) {
+                    this._roomViewModelObservable = this.track(vmo);
+                    this._roomViewModelObservable.subscribe(() => {
+                        this.emitChange("activeMiddleViewModel");
+                    });
                 }
             }
             this._gridViewModel = this.disposeTracked(this._gridViewModel);
         }
         if (changed) {
-            this.emitChange("activeSection");
+            this.emitChange("activeMiddleViewModel");
         }
     }
 
-    _createRoomViewModel(roomId) {
-        const room = this._sessionContainer.session.rooms.get(roomId);
-        if (!room) {
-            return null;
+    _createRoomViewModelInstance(roomId) {
+        const room = this._client.session.rooms.get(roomId);
+        if (room) {
+            const roomVM = new RoomViewModel(this.childOptions({room}));
+            roomVM.load();
+            return roomVM;
         }
-        const roomVM = new RoomViewModel(this.childOptions({
-            room,
-            ownUserId: this._sessionContainer.session.user.id,
+        return null;
+    }
+
+    _createUnknownRoomViewModel(roomIdOrAlias) {
+        return new UnknownRoomViewModel(this.childOptions({
+            roomIdOrAlias,
+            session: this._client.session,
         }));
-        roomVM.load();
-        return roomVM;
+    }
+
+    async _createArchivedRoomViewModel(roomId) {
+        const room = await this._client.session.loadArchivedRoom(roomId);
+        if (room) {
+            const roomVM = new RoomViewModel(this.childOptions({room}));
+            roomVM.load();
+            return roomVM;
+        }
+        return null;
+    }
+
+    _createInviteViewModel(roomId) {
+        const invite = this._client.session.invites.get(roomId);
+        if (invite) {
+            return new InviteViewModel(this.childOptions({
+                invite,
+                mediaRepository: this._client.session.mediaRepository,
+            }));
+        }
+        return null;
+    }
+
+    _createRoomBeingCreatedViewModel(localId) {
+        const roomBeingCreated = this._client.session.roomsBeingCreated.get(localId);
+        if (roomBeingCreated) {
+            return new RoomBeingCreatedViewModel(this.childOptions({
+                roomBeingCreated,
+                mediaRepository: this._client.session.mediaRepository,
+            }));
+        }
+        return null;
     }
 
     _updateRoom(roomId) {
+        // opening a room and already open?
+        if (this._roomViewModelObservable?.id === roomId) {
+            return;
+        }
+        // close if needed
+        if (this._roomViewModelObservable) {
+            this._roomViewModelObservable = this.disposeTracked(this._roomViewModelObservable);
+        }
         if (!roomId) {
-            if (this._currentRoomViewModel) {
-                this._currentRoomViewModel = this.disposeTracked(this._currentRoomViewModel);
-                this.emitChange("currentRoom");
-            }
+            // if clearing the activeMiddleViewModel rather than changing to a different one,
+            // emit so the view picks it up and show the placeholder
+            this.emitChange("activeMiddleViewModel");
             return;
         }
-        // already open?
-        if (this._currentRoomViewModel?.id === roomId) {
-            return;
-        }
-        this._currentRoomViewModel = this.disposeTracked(this._currentRoomViewModel);
-        const roomVM = this._createRoomViewModel(roomId);
-        if (roomVM) {
-            this._currentRoomViewModel = this.track(roomVM);
-        }
-        this.emitChange("currentRoom");
+        const vmo = new RoomViewModelObservable(this, roomId);
+        this._roomViewModelObservable = this.track(vmo);
+        // subscription is unsubscribed in RoomViewModelObservable.dispose, and thus handled by track
+        this._roomViewModelObservable.subscribe(() => {
+            this.emitChange("activeMiddleViewModel");
+        });
+        vmo.initialize();
     }
 
     _updateSettings(settingsOpen) {
@@ -195,11 +250,21 @@ export class SessionViewModel extends ViewModel {
         }
         if (settingsOpen) {
             this._settingsViewModel = this.track(new SettingsViewModel(this.childOptions({
-                session: this._sessionContainer.session,
+                client: this._client,
             })));
             this._settingsViewModel.load();
         }
-        this.emitChange("activeSection");
+        this.emitChange("activeMiddleViewModel");
+    }
+
+    _updateCreateRoom(createRoomOpen) {
+        if (this._createRoomViewModel) {
+            this._createRoomViewModel = this.disposeTracked(this._createRoomViewModel);
+        }
+        if (createRoomOpen) {
+            this._createRoomViewModel = this.track(new CreateRoomViewModel(this.childOptions({session: this._client.session})));
+        }
+        this.emitChange("activeMiddleViewModel");
     }
 
     _updateLightbox(eventId) {
@@ -207,8 +272,7 @@ export class SessionViewModel extends ViewModel {
             this._lightboxViewModel = this.disposeTracked(this._lightboxViewModel);
         }
         if (eventId) {
-            const roomId = this.navigation.path.get("room").value;
-            const room = this._sessionContainer.session.rooms.get(roomId);
+            const room = this._roomFromNavigation();
             this._lightboxViewModel = this.track(new LightboxViewModel(this.childOptions({eventId, room})));
         }
         this.emitChange("lightboxViewModel");
@@ -217,4 +281,24 @@ export class SessionViewModel extends ViewModel {
     get lightboxViewModel() {
         return this._lightboxViewModel;
     }
+
+    _roomFromNavigation() {
+        const roomId = this.navigation.path.get("room")?.value;
+        const room = this._client.session.rooms.get(roomId);
+        return room;
+    }
+
+    _updateRightPanel() {
+        this._rightPanelViewModel = this.disposeTracked(this._rightPanelViewModel);
+        const enable = !!this.navigation.path.get("right-panel")?.value;
+        if (enable) {
+            const room = this._roomFromNavigation();
+            this._rightPanelViewModel = this.track(new RightPanelViewModel(this.childOptions({room, session: this._client.session})));
+        }
+        this.emitChange("rightPanelViewModel");
+    }
+
+    notifyRoomReplaced(oldId, newId) {
+        this.navigation.push("room", newId);
+    }
 }

src/domain/session/common.js

@@ -14,11 +14,11 @@ See the License for the specific language governing permissions and
 limitations under the License.
 */
 
-export class ReplayDetectionEntry {
-    constructor(sessionId, messageIndex, event) {
-        this.sessionId = sessionId;
-        this.messageIndex = messageIndex;
-        this.eventId = event.event_id;
-        this.timestamp = event.origin_server_ts;
-    }
+export function imageToInfo(image) {
+    return {
+        w: image.width,
+        h: image.height,
+        mimetype: image.blob.mimeType,
+        size: image.blob.size
+    };
 }

src/domain/session/leftpanel/BaseTileViewModel.js

@@ -0,0 +1,82 @@
+/*
+Copyright 2020 Bruno Windels <bruno@windels.cloud>
+Copyright 2020, 2021 The Matrix.org Foundation C.I.C.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+import {avatarInitials, getIdentifierColorNumber, getAvatarHttpUrl} from "../../avatar";
+import {ViewModel} from "../../ViewModel";
+
+const KIND_ORDER = ["roomBeingCreated", "invite", "room"];
+
+export class BaseTileViewModel extends ViewModel {
+    constructor(options) {
+        super(options);
+        this._isOpen = false;
+        this._hidden = false;
+    }
+
+    get hidden() {
+        return this._hidden;
+    }
+
+    set hidden(value) {
+        if (value !== this._hidden) {
+            this._hidden = value;
+            this.emitChange("hidden");
+        }
+    }
+
+    close() {
+        if (this._isOpen) {
+            this._isOpen = false;
+            this.emitChange("isOpen");
+        }
+    }
+
+    open() {
+        if (!this._isOpen) {
+            this._isOpen = true;
+            this.emitChange("isOpen");
+        }
+    }
+
+    get isOpen() {
+        return this._isOpen;
+    }
+
+    compare(other) {
+        if (other.kind !== this.kind) {
+            return KIND_ORDER.indexOf(this.kind) - KIND_ORDER.indexOf(other.kind);
+        }
+        return 0;
+    }
+
+    // Avatar view model contract
+    get avatarLetter() {
+        return avatarInitials(this.name);
+    }
+
+    get avatarColorNumber() {
+        return getIdentifierColorNumber(this._avatarSource.avatarColorId);
+    }
+
+    avatarUrl(size) {
+        return getAvatarHttpUrl(this._avatarSource.avatarUrl, size, this.platform, this._avatarSource.mediaRepository);
+    }
+
+    get avatarTitle() {
+        return this.name;
+    }
+}

src/domain/session/leftpanel/InviteTileViewModel.js

@@ -0,0 +1,64 @@
+/*
+Copyright 2020, 2021 The Matrix.org Foundation C.I.C.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+import {BaseTileViewModel} from "./BaseTileViewModel.js";
+import {comparePrimitive} from "./common";
+
+export class InviteTileViewModel extends BaseTileViewModel {
+    constructor(options) {
+        super(options);
+        const {invite} = options;
+        this._invite = invite;
+        this._url = this.urlCreator.openRoomActionUrl(this._invite.id);
+    }
+
+    get busy() { return this._invite.accepting || this._invite.rejecting; }
+    get kind() { return "invite"; }
+    get url() { return this._url; }
+    get name() { return this._invite.name; }
+    get isHighlighted() { return true; }
+    get isUnread() { return true; }
+    get badgeCount() { return this.i18n`!`; }
+    get _avatarSource() { return this._invite; }
+
+    /** very important that sorting order is stable and that comparing
+     * to itself always returns 0, otherwise SortedMapList will
+     * remove the wrong children, etc ... */
+    compare(other) {
+        const parentComparison = super.compare(other);
+        if (parentComparison !== 0) {
+            return parentComparison;
+        }
+        const timeDiff = other._invite.timestamp - this._invite.timestamp;
+        if (timeDiff !== 0) {
+            return timeDiff;
+        }
+        return comparePrimitive(this._invite.id, other._invite.id);
+    }
+}
+
+export function tests() {
+    return {
+        "test compare with timestamp": assert => {
+            const urlCreator = {openRoomActionUrl() { return "";}}
+            const vm1 = new InviteTileViewModel({invite: {timestamp: 500, id: "1"}, urlCreator});
+            const vm2 = new InviteTileViewModel({invite: {timestamp: 250, id: "2"}, urlCreator});
+            assert(vm1.compare(vm2) < 0);
+            assert(vm2.compare(vm1) > 0);
+            assert.equal(vm1.compare(vm1), 0);
+        },
+    }
+}

src/domain/session/leftpanel/LeftPanelViewModel.js

@@ -15,37 +15,55 @@ See the License for the specific language governing permissions and
 limitations under the License.
 */
 
-import {ViewModel} from "../../ViewModel.js";
+import {ViewModel} from "../../ViewModel";
 import {RoomTileViewModel} from "./RoomTileViewModel.js";
+import {InviteTileViewModel} from "./InviteTileViewModel.js";
+import {RoomBeingCreatedTileViewModel} from "./RoomBeingCreatedTileViewModel.js";
 import {RoomFilter} from "./RoomFilter.js";
 import {ApplyMap} from "../../../observable/map/ApplyMap.js";
+import {addPanelIfNeeded} from "../../navigation/index";
 
 export class LeftPanelViewModel extends ViewModel {
     constructor(options) {
         super(options);
-        const {rooms} = options;
-        this._roomTileViewModels = rooms.mapValues((room, emitChange) => {
-            const isOpen = this.navigation.path.get("room")?.value === room.id;
-            const vm = new RoomTileViewModel(this.childOptions({
-                isOpen,
-                room,
-                emitChange
-            }));
-            // need to also update the current vm here as
-            // we can't call `_open` from the ctor as the map
-            // is only populated when the view subscribes.
-            if (isOpen) {
-                this._currentTileVM?.close();
-                this._currentTileVM = vm;
-            }
-            return vm;
-        });
-        this._roomListFilterMap = new ApplyMap(this._roomTileViewModels);
-        this._roomList = this._roomListFilterMap.sortValues((a, b) => a.compare(b));
+        const {session} = options;
+        this._tileViewModelsMap = this._mapTileViewModels(session.roomsBeingCreated, session.invites, session.rooms);
+        this._tileViewModelsFilterMap = new ApplyMap(this._tileViewModelsMap);
+        this._tileViewModels = this._tileViewModelsFilterMap.sortValues((a, b) => a.compare(b));
         this._currentTileVM = null;
         this._setupNavigation();
         this._closeUrl = this.urlCreator.urlForSegment("session");
         this._settingsUrl = this.urlCreator.urlForSegment("settings");
+        this._createRoomUrl = this.urlCreator.urlForSegment("create-room");
+    }
+
+    _mapTileViewModels(roomsBeingCreated, invites, rooms) {
+        // join is not commutative, invites will take precedence over rooms
+        const allTiles = invites.join(roomsBeingCreated, rooms).mapValues((item, emitChange) => {
+            let vm;
+            if (item.isBeingCreated) {
+                vm = new RoomBeingCreatedTileViewModel(this.childOptions({roomBeingCreated: item, emitChange}));
+            } else if (item.isInvite) {
+                vm = new InviteTileViewModel(this.childOptions({invite: item, emitChange}));
+            } else {
+                vm = new RoomTileViewModel(this.childOptions({room: item, emitChange}));
+            }
+            const isOpen = this.navigation.path.get("room")?.value === item.id;
+            if (isOpen) {
+                vm.open();
+                this._updateCurrentVM(vm);
+            }
+            return vm;
+        });
+        return allTiles;
+    }
+
+    _updateCurrentVM(vm) {
+        // need to also update the current vm here as
+        // we can't call `_open` from the ctor as the map
+        // is only populated when the view subscribes.
+        this._currentTileVM?.close();
+        this._currentTileVM = vm;
     }
 
     get closeUrl() {
@@ -56,6 +74,8 @@ export class LeftPanelViewModel extends ViewModel {
         return this._settingsUrl;
     }
 
+    get createRoomUrl() { return this._createRoomUrl; }
+
     _setupNavigation() {
         const roomObservable = this.navigation.observe("room");
         this.track(roomObservable.subscribe(roomId => this._open(roomId)));
@@ -75,51 +95,53 @@ export class LeftPanelViewModel extends ViewModel {
         this._currentTileVM?.close();
         this._currentTileVM = null;
         if (roomId) {
-            this._currentTileVM = this._roomTileViewModels.get(roomId);
+            this._currentTileVM = this._tileViewModelsMap.get(roomId);
             this._currentTileVM?.open();
         }
     }
 
     toggleGrid() {
+        const room = this.navigation.path.get("room");
+        let path = this.navigation.path.until("session");
         if (this.gridEnabled) {
-            let path = this.navigation.path.until("session");
-            const room = this.navigation.path.get("room");
             if (room) {
                 path = path.with(room);
+                path = addPanelIfNeeded(this.navigation, path);
             }
-            this.navigation.applyPath(path);
         } else {
-            let path = this.navigation.path.until("session");
-            const room = this.navigation.path.get("room");
             if (room) {
                 path = path.with(this.navigation.segment("rooms", [room.value]));
                 path = path.with(room);
+                path = addPanelIfNeeded(this.navigation, path);
             } else {
                 path = path.with(this.navigation.segment("rooms", []));
                 path = path.with(this.navigation.segment("empty-grid-tile", 0));
             }
-            this.navigation.applyPath(path);
         }
+        this.navigation.applyPath(path);
     }
 
-    get roomList() {
-        return this._roomList;
+    get tileViewModels() {
+        return this._tileViewModels;
     }
 
     clearFilter() {
-        this._roomListFilterMap.setApply(null);
-        this._roomListFilterMap.applyOnce((roomId, vm) => vm.hidden = false);
+        this._tileViewModelsFilterMap.setApply(null);
+        this._tileViewModelsFilterMap.applyOnce((roomId, vm) => vm.hidden = false);
     }
 
     setFilter(query) {
         query = query.trim();
         if (query.length === 0) {
             this.clearFilter();
+            return false;
         } else {
+            const startFiltering = !this._tileViewModelsFilterMap.hasApply();
             const filter = new RoomFilter(query);
-            this._roomListFilterMap.setApply((roomId, vm) => {
+            this._tileViewModelsFilterMap.setApply((roomId, vm) => {
                 vm.hidden = !filter.matches(vm);
             });
+            return startFiltering;
         }
     }
 }

src/domain/session/leftpanel/RoomBeingCreatedTileViewModel.js

@@ -0,0 +1,70 @@
+/*
+Copyright 2020 Bruno Windels <bruno@windels.cloud>
+Copyright 2020, 2021 The Matrix.org Foundation C.I.C.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+import {BaseTileViewModel} from "./BaseTileViewModel.js";
+import {comparePrimitive} from "./common";
+
+export class RoomBeingCreatedTileViewModel extends BaseTileViewModel {
+    constructor(options) {
+        super(options);
+        const {roomBeingCreated} = options;
+        this._roomBeingCreated = roomBeingCreated;
+        this._url = this.urlCreator.openRoomActionUrl(this._roomBeingCreated.id);
+    }
+
+    get busy() { return !this._roomBeingCreated.error; }
+    get kind() { return "roomBeingCreated"; }
+    get isHighlighted() { return !this.busy; }
+    get badgeCount() { return !this.busy && this.i18n`Failed`; }
+    get url() { return this._url; }
+    get name() { return this._roomBeingCreated.name; }
+    get _avatarSource() { return this._roomBeingCreated; }
+
+    /** very important that sorting order is stable and that comparing
+     * to itself always returns 0, otherwise SortedMapList will
+     * remove the wrong children, etc ... */
+    compare(other) {
+        const parentCmp = super.compare(other);
+        if (parentCmp !== 0) {
+            return parentCmp;
+        }
+        const nameCmp = comparePrimitive(this.name, other.name);
+        if (nameCmp === 0) {
+            return comparePrimitive(this._roomBeingCreated.id, other._roomBeingCreated.id);
+        } else {
+            return nameCmp;
+        }
+    }
+
+    avatarUrl(size) {
+        // allow blob url which doesn't need mxc => http resolution
+        return this._roomBeingCreated.avatarBlobUrl ?? super.avatarUrl(size);
+    }
+}
+
+export function tests() {
+    return {
+        "test compare with names": assert => {
+            const urlCreator = {openRoomActionUrl() { return "";}}
+            const vm1 = new RoomBeingCreatedTileViewModel({roomBeingCreated: {name: "A", id: "1"}, urlCreator});
+            const vm2 = new RoomBeingCreatedTileViewModel({roomBeingCreated: {name: "B", id: "2"}, urlCreator});
+            assert(vm1.compare(vm2) < 0);
+            assert(vm2.compare(vm1) > 0);
+            assert.equal(vm1.compare(vm1), 0);
+        },
+    }
+}