Support to remotely toggle push notifications

Implements MSC3881, matrix-org/matrix-spec-proposals#3881

Epic https://element-io.atlassian.net/browse/PSG-595
Fixes partially https://element-io.atlassian.net/browse/PSG-707

spec/integ/matrix-client-methods.spec.js

@@ -889,6 +889,7 @@ describe("MatrixClient", function() {
             };
 
             const prom = client.getPushers();
+            httpBackend.when("GET", "/_matrix/client/versions").respond(200, {});
             httpBackend.when("GET", "/pushers").respond(200, response);
             await httpBackend.flush();
             expect(await prom).toStrictEqual(response);

spec/test-utils/test-utils.ts

@@ -6,7 +6,7 @@ import '../olm-loader';
 
 import { logger } from '../../src/logger';
 import { IContent, IEvent, IUnsigned, MatrixEvent, MatrixEventEvent } from "../../src/models/event";
-import { ClientEvent, EventType, MatrixClient, MsgType } from "../../src";
+import { ClientEvent, EventType, IPusher, MatrixClient, MsgType } from "../../src";
 import { SyncState } from "../../src/sync";
 import { eventMapperFor } from "../../src/event-mapper";
 
@@ -371,3 +371,14 @@ export async function awaitDecryption(event: MatrixEvent): Promise<MatrixEvent>
 }
 
 export const emitPromise = (e: EventEmitter, k: string): Promise<any> => new Promise(r => e.once(k, r));
+
+export const mkPusher = (extra: Partial<IPusher> = {}): IPusher => ({
+    app_display_name: "app",
+    app_id: "123",
+    data: {},
+    device_display_name: "name",
+    kind: "http",
+    lang: "en",
+    pushkey: "pushpush",
+    ...extra,
+});

spec/unit/pusher.spec.ts

@@ -0,0 +1,69 @@
+/*
+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 MockHttpBackend from 'matrix-mock-request';
+
+import { IHttpOpts, MatrixClient } from "../../src/matrix";
+import { mkPusher } from '../test-utils/test-utils';
+
+const realSetTimeout = setTimeout;
+function flushPromises() {
+    return new Promise(r => {
+        realSetTimeout(r, 1);
+    });
+}
+
+let client: MatrixClient;
+let httpBackend: MockHttpBackend;
+
+describe("Pushers", () => {
+    beforeEach(() => {
+        httpBackend = new MockHttpBackend();
+        client = new MatrixClient({
+            baseUrl: "https://my.home.server",
+            accessToken: "my.access.token",
+            request: httpBackend.requestFn as unknown as IHttpOpts["request"],
+        });
+    });
+
+    describe("supports remotely toggling push notifications", () => {
+        it("migration support when connecting to a legacy homeserver", async () => {
+            httpBackend.when("GET", "/_matrix/client/versions").respond(200, {
+                unstable_features: {
+                    "org.matrix.msc3881": false,
+                },
+            });
+            httpBackend.when("GET", "/pushers").respond(200, {
+                pushers: [
+                    mkPusher(),
+                    mkPusher({ enabled: true }),
+                    mkPusher({ enabled: false }),
+                ],
+            });
+
+            const promise = client.getPushers();
+
+            await httpBackend.flushAllExpected();
+            await flushPromises();
+
+            const response = await promise;
+
+            expect(response.pushers[0].enabled).toBe(true);
+            expect(response.pushers[1].enabled).toBe(true);
+            expect(response.pushers[2].enabled).toBe(false);
+        });
+    });
+});

src/@types/PushRules.ts

@@ -156,9 +156,13 @@ export interface IPusher {
     lang: string;
     profile_tag?: string;
     pushkey: string;
+    enabled?: boolean | null | undefined;
+    "org.matrix.msc3881.enabled"?: boolean | null | undefined;
+    device_id?: string | null;
+    "org.matrix.msc3881.device_id"?: string | null;
 }
 
-export interface IPusherRequest extends IPusher {
+export interface IPusherRequest extends Omit<IPusher, "device_id" | "org.matrix.msc3881.device_id"> {
     append?: boolean;
 }
 

src/client.ts

@@ -8133,8 +8133,21 @@ export class MatrixClient extends TypedEventEmitter<EmittedEvents, ClientEventHa
      * @return {Promise} Resolves: Array of objects representing pushers
      * @return {module:http-api.MatrixError} Rejects: with an error response.
      */
-    public getPushers(callback?: Callback): Promise<{ pushers: IPusher[] }> {
-        return this.http.authedRequest(callback, Method.Get, "/pushers");
+    public async getPushers(callback?: Callback): Promise<{ pushers: IPusher[] }> {
+        const response = await this.http.authedRequest(callback, Method.Get, "/pushers");
+
+        // Migration path for clients that connect to a homeserver that does not support
+        // MSC3881 yet, see https://github.com/matrix-org/matrix-spec-proposals/blob/kerry/remote-push-toggle/proposals/3881-remote-push-notification-toggling.md#migration
+        if (!await this.doesServerSupportUnstableFeature("org.matrix.msc3881")) {
+            response.pushers = response.pushers.map(pusher => {
+                if (!pusher.hasOwnProperty("enabled")) {
+                    pusher.enabled = true;
+                }
+                return pusher;
+            });
+        }
+
+        return response;
     }
 
     /**