forked from mystiq/hydrogen-web
remove dead code for incomplete memory store
This commit is contained in:
Bruno Windels
parent
e105bc4237
commit
cb9606a87b
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@ -1 +0,0 @@
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src/matrix/storage/memory
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@ -17,7 +17,6 @@ module.exports = {
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'**/scripts/**',
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'**/target/**',
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'**/prototypes/**',
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'**/src/matrix/storage/memory/**',
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'**/src/platform/web/legacy-polyfill.js',
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'**/src/platform/web/worker/polyfill.js'
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],
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@ -1,53 +0,0 @@
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/*
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Copyright 2020 Bruno Windels <bruno@windels.cloud>
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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import {Transaction} from "./Transaction.js";
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import { STORE_MAP, STORE_NAMES } from "../common.js";
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export class Storage {
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constructor(initialStoreValues = {}) {
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this._validateStoreNames(Object.keys(initialStoreValues));
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this.storeNames = STORE_MAP;
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this._storeValues = STORE_NAMES.reduce((values, name) => {
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values[name] = initialStoreValues[name] || null;
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}, {});
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}
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_validateStoreNames(storeNames) {
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const idx = storeNames.findIndex(name => !STORE_MAP.hasOwnProperty(name));
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if (idx !== -1) {
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throw new Error(`Invalid store name ${storeNames[idx]}`);
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}
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}
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_createTxn(storeNames, writable) {
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this._validateStoreNames(storeNames);
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const storeValues = storeNames.reduce((values, name) => {
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return values[name] = this._storeValues[name];
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}, {});
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return Promise.resolve(new Transaction(storeValues, writable));
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}
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readTxn(storeNames) {
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// TODO: avoid concurrency
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return this._createTxn(storeNames, false);
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}
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readWriteTxn(storeNames) {
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// TODO: avoid concurrency
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return this._createTxn(storeNames, true);
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}
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}
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@ -1,73 +0,0 @@
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/*
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Copyright 2020 Bruno Windels <bruno@windels.cloud>
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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import {RoomTimelineStore} from "./stores/RoomTimelineStore.js";
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export class Transaction {
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constructor(storeValues, writable) {
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this._storeValues = storeValues;
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this._txnStoreValues = {};
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this._writable = writable;
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}
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_store(name, mapper) {
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if (!this._txnStoreValues.hasOwnProperty(name)) {
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if (!this._storeValues.hasOwnProperty(name)) {
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throw new Error(`Transaction wasn't opened for store ${name}`);
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}
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const store = mapper(this._storeValues[name]);
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const clone = store.cloneStoreValue();
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// extra prevention for writing
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if (!this._writable) {
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Object.freeze(clone);
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}
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this._txnStoreValues[name] = clone;
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}
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return mapper(this._txnStoreValues[name]);
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}
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get session() {
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throw new Error("not yet implemented");
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// return this._store("session", storeValue => new SessionStore(storeValue));
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}
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get roomSummary() {
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throw new Error("not yet implemented");
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// return this._store("roomSummary", storeValue => new RoomSummaryStore(storeValue));
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}
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get roomTimeline() {
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return this._store("roomTimeline", storeValue => new RoomTimelineStore(storeValue));
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}
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get roomState() {
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throw new Error("not yet implemented");
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// return this._store("roomState", storeValue => new RoomStateStore(storeValue));
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}
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complete() {
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for(let name of Object.keys(this._txnStoreValues)) {
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this._storeValues[name] = this._txnStoreValues[name];
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}
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this._txnStoreValues = null;
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return Promise.resolve();
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}
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abort() {
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this._txnStoreValues = null;
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return Promise.resolve();
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}
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}
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@ -1,237 +0,0 @@
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/*
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Copyright 2020 Bruno Windels <bruno@windels.cloud>
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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import {SortKey} from "../../room/timeline/SortKey.js";
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import {sortedIndex} from "../../../utils/sortedIndex.js";
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import {Store} from "./Store.js";
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function compareKeys(key, entry) {
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if (key.roomId === entry.roomId) {
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return key.sortKey.compare(entry.sortKey);
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} else {
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return key.roomId < entry.roomId ? -1 : 1;
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}
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}
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class Range {
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constructor(timeline, lower, upper, lowerOpen, upperOpen) {
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this._timeline = timeline;
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this._lower = lower;
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this._upper = upper;
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this._lowerOpen = lowerOpen;
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this._upperOpen = upperOpen;
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}
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/** projects the range onto the timeline array */
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project(roomId, maxCount = Number.MAX_SAFE_INTEGER) {
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// determine lowest and highest allowed index.
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// Important not to bleed into other roomIds here.
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const lowerKey = {roomId, sortKey: this._lower || SortKey.minKey };
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// apply lower key being open (excludes given key)
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let minIndex = sortedIndex(this._timeline, lowerKey, compareKeys);
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if (this._lowerOpen && minIndex < this._timeline.length && compareKeys(lowerKey, this._timeline[minIndex]) === 0) {
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minIndex += 1;
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}
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const upperKey = {roomId, sortKey: this._upper || SortKey.maxKey };
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// apply upper key being open (excludes given key)
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let maxIndex = sortedIndex(this._timeline, upperKey, compareKeys);
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if (this._upperOpen && maxIndex < this._timeline.length && compareKeys(upperKey, this._timeline[maxIndex]) === 0) {
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maxIndex -= 1;
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}
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// find out from which edge we should grow
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// if upper or lower bound
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// again, important not to go below minIndex or above maxIndex
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// to avoid bleeding into other rooms
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let startIndex, endIndex;
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if (!this._lower && this._upper) {
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startIndex = Math.max(minIndex, maxIndex - maxCount);
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endIndex = maxIndex;
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} else if (this._lower && !this._upper) {
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startIndex = minIndex;
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endIndex = Math.min(maxIndex, minIndex + maxCount);
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} else {
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startIndex = minIndex;
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endIndex = maxIndex;
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}
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// if startIndex is out of range, make range empty
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if (startIndex === this._timeline.length) {
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startIndex = endIndex = 0;
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}
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const count = endIndex - startIndex;
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return {startIndex, count};
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}
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select(roomId, maxCount) {
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const {startIndex, count} = this.project(roomId, this._timeline, maxCount);
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return this._timeline.slice(startIndex, startIndex + count);
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}
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}
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export class RoomTimelineStore extends Store {
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constructor(timeline, writable) {
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super(timeline || [], writable);
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}
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get _timeline() {
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return this._storeValue;
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}
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/** Creates a range that only includes the given key
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* @param {SortKey} sortKey the key
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* @return {Range} the created range
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*/
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onlyRange(sortKey) {
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return new Range(this._timeline, sortKey, sortKey);
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}
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/** Creates a range that includes all keys before sortKey, and optionally also the key itself.
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* @param {SortKey} sortKey the key
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* @param {boolean} [open=false] whether the key is included (false) or excluded (true) from the range at the upper end.
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* @return {Range} the created range
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*/
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upperBoundRange(sortKey, open=false) {
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return new Range(this._timeline, undefined, sortKey, undefined, open);
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}
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/** Creates a range that includes all keys after sortKey, and optionally also the key itself.
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* @param {SortKey} sortKey the key
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* @param {boolean} [open=false] whether the key is included (false) or excluded (true) from the range at the lower end.
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* @return {Range} the created range
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*/
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lowerBoundRange(sortKey, open=false) {
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return new Range(this._timeline, sortKey, undefined, open);
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}
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/** Creates a range that includes all keys between `lower` and `upper`, and optionally the given keys as well.
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* @param {SortKey} lower the lower key
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* @param {SortKey} upper the upper key
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* @param {boolean} [lowerOpen=false] whether the lower key is included (false) or excluded (true) from the range.
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* @param {boolean} [upperOpen=false] whether the upper key is included (false) or excluded (true) from the range.
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* @return {Range} the created range
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*/
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boundRange(lower, upper, lowerOpen=false, upperOpen=false) {
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return new Range(this._timeline, lower, upper, lowerOpen, upperOpen);
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}
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/** Looks up the last `amount` entries in the timeline for `roomId`.
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* @param {string} roomId
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* @param {number} amount
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* @return {Promise<Entry[]>} a promise resolving to an array with 0 or more entries, in ascending order.
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*/
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lastEvents(roomId, amount) {
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return this.eventsBefore(roomId, SortKey.maxKey, amount);
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}
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/** Looks up the first `amount` entries in the timeline for `roomId`.
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* @param {string} roomId
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* @param {number} amount
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* @return {Promise<Entry[]>} a promise resolving to an array with 0 or more entries, in ascending order.
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*/
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firstEvents(roomId, amount) {
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return this.eventsAfter(roomId, SortKey.minKey, amount);
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}
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/** Looks up `amount` entries after `sortKey` in the timeline for `roomId`.
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* The entry for `sortKey` is not included.
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* @param {string} roomId
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* @param {SortKey} sortKey
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* @param {number} amount
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* @return {Promise<Entry[]>} a promise resolving to an array with 0 or more entries, in ascending order.
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*/
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eventsAfter(roomId, sortKey, amount) {
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const events = this.lowerBoundRange(sortKey, true).select(roomId, amount);
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return Promise.resolve(events);
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}
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/** Looks up `amount` entries before `sortKey` in the timeline for `roomId`.
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* The entry for `sortKey` is not included.
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* @param {string} roomId
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* @param {SortKey} sortKey
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* @param {number} amount
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* @return {Promise<Entry[]>} a promise resolving to an array with 0 or more entries, in ascending order.
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*/
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eventsBefore(roomId, sortKey, amount) {
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const events = this.upperBoundRange(sortKey, true).select(roomId, amount);
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return Promise.resolve(events);
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}
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/** Looks up the first, if any, event entry (so excluding gap entries) after `sortKey`.
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* @param {string} roomId
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* @param {SortKey} sortKey
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* @return {Promise<(?Entry)>} a promise resolving to entry, if any.
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*/
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nextEvent(roomId, sortKey) {
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const searchSpace = this.lowerBoundRange(sortKey, true).select(roomId);
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const event = searchSpace.find(entry => !!entry.event);
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return Promise.resolve(event);
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}
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/** Looks up the first, if any, event entry (so excluding gap entries) before `sortKey`.
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* @param {string} roomId
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* @param {SortKey} sortKey
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* @return {Promise<(?Entry)>} a promise resolving to entry, if any.
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*/
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previousEvent(roomId, sortKey) {
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const searchSpace = this.upperBoundRange(sortKey, true).select(roomId);
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const event = searchSpace.reverse().find(entry => !!entry.event);
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return Promise.resolve(event);
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}
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/** Inserts a new entry into the store. The combination of roomId and sortKey should not exist yet, or an error is thrown.
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* @param {Entry} entry the entry to insert
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* @return {Promise<>} a promise resolving to undefined if the operation was successful, or a StorageError if not.
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* @throws {StorageError} ...
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*/
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insert(entry) {
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this.assertWritable();
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const insertIndex = sortedIndex(this._timeline, entry, compareKeys);
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if (insertIndex < this._timeline.length) {
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const existingEntry = this._timeline[insertIndex];
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if (compareKeys(entry, existingEntry) === 0) {
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return Promise.reject(new Error("entry already exists"));
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}
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}
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this._timeline.splice(insertIndex, 0, entry);
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return Promise.resolve();
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}
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/** Updates the entry into the store with the given [roomId, sortKey] combination.
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* If not yet present, will insert. Might be slower than add.
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* @param {Entry} entry the entry to update.
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* @return {Promise<>} a promise resolving to undefined if the operation was successful, or a StorageError if not.
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*/
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update(entry) {
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this.assertWritable();
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let update = false;
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const updateIndex = sortedIndex(this._timeline, entry, compareKeys);
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if (updateIndex < this._timeline.length) {
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const existingEntry = this._timeline[updateIndex];
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if (compareKeys(entry, existingEntry) === 0) {
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update = true;
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}
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}
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this._timeline.splice(updateIndex, update ? 1 : 0, entry);
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return Promise.resolve();
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}
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get(roomId, sortKey) {
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const range = this.onlyRange(sortKey);
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const {startIndex, count} = range.project(roomId);
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const event = count ? this._timeline[startIndex] : undefined;
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return Promise.resolve(event);
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}
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}
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@ -1,43 +0,0 @@
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/*
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Copyright 2020 Bruno Windels <bruno@windels.cloud>
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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export class Store {
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constructor(storeValue, writable) {
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this._storeValue = storeValue;
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this._writable = writable;
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}
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// makes a copy deep enough that any modifications in the store
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// won't affect the original
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// used for transactions
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cloneStoreValue() {
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// assumes 1 level deep is enough, and that values will be replaced
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// rather than updated.
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if (Array.isArray(this._storeValue)) {
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return this._storeValue.slice();
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} else if (typeof this._storeValue === "object") {
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return Object.assign({}, this._storeValue);
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} else {
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return this._storeValue;
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}
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}
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assertWritable() {
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if (!this._writable) {
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throw new Error("Tried to write in read-only transaction");
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}
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}
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}
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