Resume voice broadcast on load (#9475)

src/voice-broadcast/utils/VoiceBroadcastResumer.ts

@@ -0,0 +1,56 @@
+/*
+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 { ClientEvent, MatrixClient, Room } from "matrix-js-sdk/src/matrix";
+
+import { IDestroyable } from "../../utils/IDestroyable";
+import { findRoomLiveVoiceBroadcastFromUserAndDevice } from "./findRoomLiveVoiceBroadcastFromUserAndDevice";
+import { resumeVoiceBroadcastInRoom } from "./resumeVoiceBroadcastInRoom";
+
+export class VoiceBroadcastResumer implements IDestroyable {
+    private seenRooms = new Set<string>();
+    private userId: string;
+    private deviceId: string;
+
+    public constructor(
+        private client: MatrixClient,
+    ) {
+        this.client.on(ClientEvent.Room, this.onRoom);
+        this.userId = this.client.getUserId();
+        this.deviceId = this.client.getDeviceId();
+    }
+
+    private onRoom = (room: Room): void => {
+        if (this.seenRooms.has(room.roomId)) return;
+
+        this.seenRooms.add(room.roomId);
+
+        const infoEvent = findRoomLiveVoiceBroadcastFromUserAndDevice(
+            room,
+            this.userId,
+            this.deviceId,
+        );
+
+        if (infoEvent) {
+            resumeVoiceBroadcastInRoom(infoEvent, room, this.client);
+        }
+    };
+
+    destroy(): void {
+        this.client.off(ClientEvent.Room, this.onRoom);
+        this.seenRooms = new Set<string>();
+    }
+}