Implement m.login.terms stage

src/matrix/registration/registrationStageFromType.ts

@@ -14,11 +14,19 @@ See the License for the specific language governing permissions and
 limitations under the License.
 */
 
+import type {BaseRegistrationStage} from "./stages/BaseRegistrationStage";
+import type {HomeServerApi} from "../net/HomeServerApi";
+import type {RegistrationParameters} from "./Registration";
 import {DummyAuth} from "./stages/DummyAuth";
+import {TermsAuth} from "./stages/TermsAuth";
 
-export function registrationStageFromType(type: string): typeof DummyAuth | undefined {
+type DerivedFromBaseRegistration = { new(hsApi: HomeServerApi, registrationData: RegistrationParameters, session: string, params?: Record<string, any>): BaseRegistrationStage } & typeof BaseRegistrationStage | undefined;
+
+export function registrationStageFromType(type: string): DerivedFromBaseRegistration {
     switch (type) {
         case "m.login.dummy":
             return DummyAuth;
+        case "m.login.terms":
+            return TermsAuth;
     }
 }

src/matrix/registration/stages/TermsAuth.ts

@@ -0,0 +1,39 @@
+/*
+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 {BaseRegistrationStage} from "./BaseRegistrationStage";
+
+export class TermsAuth extends BaseRegistrationStage {
+
+    async complete() {
+        const { username, password, initialDeviceDisplayName, inhibitLogin } = this._registrationData;
+        const response = await this._hsApi.register(username, password, initialDeviceDisplayName, {
+            session: this._session,
+            type: this.type
+        }, inhibitLogin).response();
+        return this.parseResponse(response);
+    }
+
+    get type(): string {
+        return "m.login.terms";
+    }
+
+    // todo: add better parsing logic here, also remember that server admins can
+    // require any sort documents here, even those that are not toc/privacy policies
+    get privacyPolicy() {
+        return this._params?.policies["privacy_policy"];
+    }
+}