Add voice broadcast pre-recoding PiP (#9548)

src/voice-broadcast/models/VoiceBroadcastPreRecording.ts

@@ -0,0 +1,58 @@
+/*
+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, RoomMember } from "matrix-js-sdk/src/matrix";
+import { TypedEventEmitter } from "matrix-js-sdk/src/models/typed-event-emitter";
+
+import { IDestroyable } from "../../utils/IDestroyable";
+import { VoiceBroadcastRecordingsStore } from "../stores/VoiceBroadcastRecordingsStore";
+import { startNewVoiceBroadcastRecording } from "../utils/startNewVoiceBroadcastRecording";
+
+type VoiceBroadcastPreRecordingEvent = "dismiss";
+
+interface EventMap {
+    "dismiss": (voiceBroadcastPreRecording: VoiceBroadcastPreRecording) => void;
+}
+
+export class VoiceBroadcastPreRecording
+    extends TypedEventEmitter<VoiceBroadcastPreRecordingEvent, EventMap>
+    implements IDestroyable {
+    public constructor(
+        public room: Room,
+        public sender: RoomMember,
+        private client: MatrixClient,
+        private recordingsStore: VoiceBroadcastRecordingsStore,
+    ) {
+        super();
+    }
+
+    public start = async (): Promise<void> => {
+        await startNewVoiceBroadcastRecording(
+            this.room,
+            this.client,
+            this.recordingsStore,
+        );
+        this.emit("dismiss", this);
+    };
+
+    public cancel = (): void => {
+        this.emit("dismiss", this);
+    };
+
+    public destroy(): void {
+        this.removeAllListeners();
+    }
+}