117 lines
3.8 KiB
TypeScript
117 lines
3.8 KiB
TypeScript
/*
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Copyright 2022 The Matrix.org Foundation C.I.C.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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import { MatrixClient, MatrixEvent } from "matrix-js-sdk/src/matrix";
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import { TypedEventEmitter } from "matrix-js-sdk/src/models/typed-event-emitter";
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import { VoiceBroadcastPlayback, VoiceBroadcastPlaybackEvent, VoiceBroadcastPlaybackState } from "..";
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import { IDestroyable } from "../../utils/IDestroyable";
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export enum VoiceBroadcastPlaybacksStoreEvent {
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CurrentChanged = "current_changed",
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}
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interface EventMap {
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[VoiceBroadcastPlaybacksStoreEvent.CurrentChanged]: (recording: VoiceBroadcastPlayback | null) => void;
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}
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/**
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* This store manages VoiceBroadcastPlaybacks:
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* - access the currently playing voice broadcast
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* - ensures that only once broadcast is playing at a time
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*/
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export class VoiceBroadcastPlaybacksStore
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extends TypedEventEmitter<VoiceBroadcastPlaybacksStoreEvent, EventMap>
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implements IDestroyable
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{
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private current: VoiceBroadcastPlayback | null;
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/** Playbacks indexed by their info event id. */
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private playbacks = new Map<string, VoiceBroadcastPlayback>();
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public constructor() {
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super();
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}
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public setCurrent(current: VoiceBroadcastPlayback): void {
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if (this.current === current) return;
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this.current = current;
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this.addPlayback(current);
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this.emit(VoiceBroadcastPlaybacksStoreEvent.CurrentChanged, current);
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}
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public clearCurrent(): void {
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if (this.current === null) return;
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this.current = null;
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this.emit(VoiceBroadcastPlaybacksStoreEvent.CurrentChanged, null);
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}
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public getCurrent(): VoiceBroadcastPlayback | null {
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return this.current;
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}
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public getByInfoEvent(infoEvent: MatrixEvent, client: MatrixClient): VoiceBroadcastPlayback {
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const infoEventId = infoEvent.getId();
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if (!this.playbacks.has(infoEventId)) {
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this.addPlayback(new VoiceBroadcastPlayback(infoEvent, client));
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}
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return this.playbacks.get(infoEventId);
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}
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private addPlayback(playback: VoiceBroadcastPlayback): void {
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const infoEventId = playback.infoEvent.getId();
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if (this.playbacks.has(infoEventId)) return;
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this.playbacks.set(infoEventId, playback);
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playback.on(VoiceBroadcastPlaybackEvent.StateChanged, this.onPlaybackStateChanged);
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}
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private onPlaybackStateChanged = (state: VoiceBroadcastPlaybackState, playback: VoiceBroadcastPlayback): void => {
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switch (state) {
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case VoiceBroadcastPlaybackState.Buffering:
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case VoiceBroadcastPlaybackState.Playing:
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this.pauseExcept(playback);
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this.setCurrent(playback);
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break;
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case VoiceBroadcastPlaybackState.Stopped:
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this.clearCurrent();
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break;
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}
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};
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private pauseExcept(playbackNotToPause: VoiceBroadcastPlayback): void {
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for (const playback of this.playbacks.values()) {
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if (playback !== playbackNotToPause) {
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playback.pause();
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}
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}
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}
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public destroy(): void {
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this.removeAllListeners();
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for (const playback of this.playbacks.values()) {
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playback.off(VoiceBroadcastPlaybackEvent.StateChanged, this.onPlaybackStateChanged);
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}
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this.playbacks = new Map();
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}
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}
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