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| 1 | +import { effect, onDispose } from 'maverick.js'; |
| 2 | +import { DOMEvent, isNumber } from 'maverick.js/std'; |
| 3 | + |
| 4 | +import { MediaPlayerController } from '../api/player-controller'; |
| 5 | + |
| 6 | +export class NavigatorMediaSession extends MediaPlayerController { |
| 7 | + protected static _actions = ['play', 'pause', 'seekforward', 'seekbackward', 'seekto'] as const; |
| 8 | + |
| 9 | + constructor() { |
| 10 | + super(); |
| 11 | + } |
| 12 | + |
| 13 | + protected override onConnect() { |
| 14 | + effect(this._onMetadataChange.bind(this)); |
| 15 | + effect(this._onPlaybackStateChange.bind(this)); |
| 16 | + |
| 17 | + const handleAction = this._handleAction.bind(this); |
| 18 | + for (const action of NavigatorMediaSession._actions) { |
| 19 | + navigator.mediaSession.setActionHandler(action, handleAction); |
| 20 | + } |
| 21 | + |
| 22 | + onDispose(this._onDisconnect.bind(this)); |
| 23 | + } |
| 24 | + |
| 25 | + protected _onDisconnect() { |
| 26 | + for (const action of NavigatorMediaSession._actions) { |
| 27 | + navigator.mediaSession.setActionHandler(action, null); |
| 28 | + } |
| 29 | + } |
| 30 | + |
| 31 | + protected _onMetadataChange() { |
| 32 | + const { title, artist, poster } = this.$state; |
| 33 | + navigator.mediaSession.metadata = new MediaMetadata({ |
| 34 | + title: title(), |
| 35 | + artist: artist(), |
| 36 | + artwork: [{ src: poster() }], |
| 37 | + }); |
| 38 | + } |
| 39 | + |
| 40 | + protected _onPlaybackStateChange() { |
| 41 | + const { canPlay, paused } = this.$state; |
| 42 | + navigator.mediaSession.playbackState = !canPlay() ? 'none' : paused() ? 'paused' : 'playing'; |
| 43 | + } |
| 44 | + |
| 45 | + protected _handleAction(details: MediaSessionActionDetails) { |
| 46 | + const trigger = new DOMEvent(`media-session-action`, { detail: details }); |
| 47 | + switch (details.action) { |
| 48 | + case 'play': |
| 49 | + this.dispatch('media-play-request', { trigger }); |
| 50 | + break; |
| 51 | + case 'pause': |
| 52 | + this.dispatch('media-pause-request', { trigger }); |
| 53 | + break; |
| 54 | + case 'seekto': |
| 55 | + case 'seekforward': |
| 56 | + case 'seekbackward': |
| 57 | + this.dispatch('media-seek-request', { |
| 58 | + detail: isNumber(details.seekTime) |
| 59 | + ? details.seekTime |
| 60 | + : this.$state.currentTime() + (details.seekOffset ?? 10), |
| 61 | + trigger, |
| 62 | + }); |
| 63 | + break; |
| 64 | + } |
| 65 | + } |
| 66 | +} |
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