Pause non-live broadcast from other room

src/stores/RoomViewStore.tsx

@@ -57,6 +57,7 @@ import {
 } from "../voice-broadcast";
 import { IRoomStateEventsActionPayload } from "../actions/MatrixActionCreators";
 import { showCantStartACallDialog } from "../voice-broadcast/utils/showCantStartACallDialog";
+import { pauseNonLiveBroadcastFromOtherRoom } from "../voice-broadcast/utils/pauseNonLiveBroadcastFromOtherRoom";
 
 const NUM_JOIN_RETRY = 5;
 
@@ -445,6 +446,7 @@ export class RoomViewStore extends EventEmitter {
             }
 
             if (room) {
+                pauseNonLiveBroadcastFromOtherRoom(room, this.stores.voiceBroadcastPlaybacksStore);
                 this.doMaybeSetCurrentVoiceBroadcastPlayback(room);
             }
         } else if (payload.room_alias) {

src/voice-broadcast/stores/VoiceBroadcastPlaybacksStore.ts

@@ -37,7 +37,7 @@ export class VoiceBroadcastPlaybacksStore
     extends TypedEventEmitter<VoiceBroadcastPlaybacksStoreEvent, EventMap>
     implements IDestroyable
 {
-    private current: VoiceBroadcastPlayback | null;
+    private current: VoiceBroadcastPlayback | null = null;
 
     /** Playbacks indexed by their info event id. */
     private playbacks = new Map<string, VoiceBroadcastPlayback>();

src/voice-broadcast/utils/pauseNonLiveBroadcastFromOtherRoom.ts

@@ -0,0 +1,37 @@
+/*
+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 { Room } from "matrix-js-sdk/src/matrix";
+
+import { VoiceBroadcastPlaybacksStore } from "..";
+
+export const pauseNonLiveBroadcastFromOtherRoom = (
+    room: Room,
+    voiceBroadcastPlaybacksStore: VoiceBroadcastPlaybacksStore,
+): void => {
+    const playingBroadcast = voiceBroadcastPlaybacksStore.getCurrent();
+
+    if (
+        !playingBroadcast ||
+        playingBroadcast?.getLiveness() === "live" ||
+        playingBroadcast?.infoEvent.getRoomId() === room.roomId
+    ) {
+        return;
+    }
+
+    voiceBroadcastPlaybacksStore.clearCurrent();
+    playingBroadcast.pause();
+};

test/voice-broadcast/utils/pauseNonLiveBroadcastFromOtherRoom-test.ts

@@ -0,0 +1,103 @@
+/*
+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 { MatrixClient, Room } from "matrix-js-sdk/src/matrix";
+
+import {
+    VoiceBroadcastInfoState,
+    VoiceBroadcastPlayback,
+    VoiceBroadcastPlaybacksStore,
+} from "../../../src/voice-broadcast";
+import { pauseNonLiveBroadcastFromOtherRoom } from "../../../src/voice-broadcast/utils/pauseNonLiveBroadcastFromOtherRoom";
+import { stubClient } from "../../test-utils";
+import { mkVoiceBroadcastInfoStateEvent } from "./test-utils";
+
+describe("pauseNonLiveBroadcastFromOtherRoom", () => {
+    const roomId = "!room:example.com";
+    const roomId2 = "!room2@example.com";
+    let room: Room;
+    let client: MatrixClient;
+    let playback: VoiceBroadcastPlayback;
+    let playbacks: VoiceBroadcastPlaybacksStore;
+
+    const mkPlayback = (infoState: VoiceBroadcastInfoState, roomId: string): VoiceBroadcastPlayback => {
+        const infoEvent = mkVoiceBroadcastInfoStateEvent(
+            roomId,
+            infoState,
+            client.getSafeUserId(),
+            client.getDeviceId()!,
+        );
+        const playback = new VoiceBroadcastPlayback(infoEvent, client);
+        jest.spyOn(playback, "pause");
+        playbacks.setCurrent(playback);
+        return playback;
+    };
+
+    beforeEach(() => {
+        client = stubClient();
+        room = new Room(roomId, client, client.getSafeUserId());
+        playbacks = new VoiceBroadcastPlaybacksStore();
+        jest.spyOn(playbacks, "clearCurrent");
+    });
+
+    afterEach(() => {
+        playback?.destroy();
+        playbacks.destroy();
+    });
+
+    describe("when there is no current playback", () => {
+        it("should not clear the current playback", () => {
+            pauseNonLiveBroadcastFromOtherRoom(room, playbacks);
+            expect(playbacks.clearCurrent).not.toHaveBeenCalled();
+        });
+    });
+
+    describe("when listening to a live broadcast in another room", () => {
+        beforeEach(() => {
+            playback = mkPlayback(VoiceBroadcastInfoState.Started, roomId2);
+        });
+
+        it("should not clear current / pause the playback", () => {
+            pauseNonLiveBroadcastFromOtherRoom(room, playbacks);
+            expect(playbacks.clearCurrent).not.toHaveBeenCalled();
+            expect(playback.pause).not.toHaveBeenCalled();
+        });
+    });
+
+    describe("when listening to a non-live broadcast in the same room", () => {
+        beforeEach(() => {
+            playback = mkPlayback(VoiceBroadcastInfoState.Stopped, roomId);
+        });
+
+        it("should not clear current / pause the playback", () => {
+            pauseNonLiveBroadcastFromOtherRoom(room, playbacks);
+            expect(playbacks.clearCurrent).not.toHaveBeenCalled();
+            expect(playback.pause).not.toHaveBeenCalled();
+        });
+    });
+
+    describe("when listening to a non-live broadcast in another room", () => {
+        beforeEach(() => {
+            playback = mkPlayback(VoiceBroadcastInfoState.Stopped, roomId2);
+        });
+
+        it("should clear current and pause the playback", () => {
+            pauseNonLiveBroadcastFromOtherRoom(room, playbacks);
+            expect(playbacks.getCurrent()).toBeNull();
+            expect(playback.pause).toHaveBeenCalled();
+        });
+    });
+});