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koel/resources/assets/js/services/playbackService.ts
2022-05-12 19:03:06 +02:00

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import { orderBy, shuffle, throttle } from 'lodash'
import plyr from 'plyr'
import { nextTick } from 'vue'
import isMobile from 'ismobilejs'
import { eventBus, isAudioContextSupported } from '@/utils'
import {
commonStore,
preferenceStore as preferences,
queueStore,
recentlyPlayedStore,
songStore,
userStore
} from '@/stores'
import { audioService, socketService } from '@/services'
import router from '@/router'
/**
* The number of seconds before the current song ends to start preload the next one.
*/
const PRELOAD_BUFFER = 30
const DEFAULT_VOLUME_VALUE = 7
const VOLUME_INPUT_SELECTOR = '#volumeInput'
const REPEAT_MODES: RepeatMode[] = ['NO_REPEAT', 'REPEAT_ALL', 'REPEAT_ONE']
export const playbackService = {
player: null as Plyr | null,
volumeInput: null as unknown as HTMLInputElement,
repeatModes: REPEAT_MODES,
initialized: false,
mainWin: null as any,
init () {
// We don't need to init this service twice, or the media events will be duplicated.
if (this.initialized) {
return
}
this.player = plyr.setup(document.querySelector<HTMLMediaElement>('.plyr')!, {
controls: []
})[0]
this.volumeInput = document.querySelector<HTMLInputElement>(VOLUME_INPUT_SELECTOR)!
this.listenToMediaEvents(this.player.media)
if (isAudioContextSupported) {
try {
this.setVolume(preferences.volume)
} catch (e) {
}
audioService.init(this.player.media)
eventBus.emit('INIT_EQUALIZER')
}
this.setMediaSessionActionHandlers()
this.listenToSocketEvents()
this.initialized = true
},
listenToSocketEvents () {
socketService.listen('SOCKET_TOGGLE_PLAYBACK', () => this.toggle())
.listen('SOCKET_PLAY_NEXT', () => this.playNext())
.listen('SOCKET_PLAY_PREV', () => this.playPrev())
.listen('SOCKET_GET_STATUS', () => {
const data = queueStore.current ? songStore.generateDataToBroadcast(queueStore.current) : {
volume: this.volumeInput.value
}
socketService.broadcast('SOCKET_STATUS', data)
})
.listen('SOCKET_GET_CURRENT_SONG', () => {
socketService.broadcast(
'SOCKET_SONG',
queueStore.current
? songStore.generateDataToBroadcast(queueStore.current)
: { song: null }
)
})
.listen('SOCKET_SET_VOLUME', ({ volume }: { volume: number }) => this.setVolume(volume))
},
setMediaSessionActionHandlers () {
navigator.mediaSession.setActionHandler('play', () => this.resume())
navigator.mediaSession.setActionHandler('pause', () => this.pause())
navigator.mediaSession.setActionHandler('previoustrack', () => this.playPrev())
navigator.mediaSession.setActionHandler('nexttrack', () => this.playNext())
},
listenToMediaEvents (mediaElement: HTMLMediaElement) {
mediaElement.addEventListener('error', () => this.playNext(), true)
mediaElement.addEventListener('ended', () => {
if (commonStore.state.useLastfm && userStore.current.preferences.lastfm_session_key) {
songStore.scrobble(queueStore.current!)
}
preferences.repeatMode === 'REPEAT_ONE' ? this.restart() : this.playNext()
})
mediaElement.addEventListener('timeupdate', throttle(() => {
const currentSong = queueStore.current!
if (!currentSong.playCountRegistered && !this.isTranscoding) {
// if we've passed 25% of the song, it's safe to say the song has been "played".
// Refer to https://github.com/koel/koel/issues/1087
if (!mediaElement.duration || mediaElement.currentTime * 4 >= mediaElement.duration) {
this.registerPlay(currentSong)
}
}
const nextSong = queueStore.next
if (!nextSong || nextSong.preloaded || this.isTranscoding) {
return
}
if (mediaElement.duration && mediaElement.currentTime + PRELOAD_BUFFER > mediaElement.duration) {
this.preload(nextSong)
}
}, 3000))
},
get isTranscoding () {
return isMobile.any && preferences.transcodeOnMobile
},
registerPlay (song: Song) {
recentlyPlayedStore.add(song)
songStore.registerPlay(song)
recentlyPlayedStore.fetchAll()
song.playCountRegistered = true
},
preload (song: Song) {
const audioElement = document.createElement('audio')
audioElement.setAttribute('src', songStore.getSourceUrl(song))
audioElement.setAttribute('preload', 'auto')
audioElement.load()
song.preloaded = true
},
/**
* Play a song. Because
*
* So many adventures couldn't happen today,
* So many songs we forgot to play
* So many dreams swinging out of the blue
* We'll let them come true
*/
async play (song: Song | undefined) {
if (!song) {
return
}
document.title = `${song.title} ♫ Koel`
this.player!.media.setAttribute('title', `${song.artist.name} - ${song.title}`)
if (queueStore.current) {
queueStore.current.playbackState = 'Stopped'
}
song.playbackState = 'Playing'
queueStore.current = song
// Manually set the `src` attribute of the audio to prevent plyr from resetting
// the audio media object and cause our equalizer to malfunction.
this.getPlayer().media.src = songStore.getSourceUrl(song)
// We'll just "restart" playing the song, which will handle notification, scrobbling etc.
// Fixes #898
if (isAudioContextSupported) {
await audioService.getContext().resume()
}
await this.restart()
},
showNotification (song: Song) {
if (!window.Notification || !preferences.notify) {
return
}
try {
const notif = new window.Notification(`${song.title}`, {
icon: song.album.cover,
body: `${song.album.name} ${song.artist.name}`
})
notif.onclick = () => window.focus()
window.setTimeout(() => notif.close(), 5000)
} catch (e) {
// Notification fails.
// @link https://developer.mozilla.org/en-US/docs/Web/API/ServiceWorkerRegistration/showNotification
console.error(e)
}
navigator.mediaSession.metadata = new MediaMetadata({
title: song.title,
artist: song.artist.name,
album: song.album.name,
artwork: [
{ src: song.album.cover, sizes: '256x256', type: 'image/png' }
]
})
},
async restart () {
const song = queueStore.current!
this.showNotification(song)
// Record the UNIX timestamp the song starts playing, for scrobbling purpose
song.playStartTime = Math.floor(Date.now() / 1000)
song.playCountRegistered = false
eventBus.emit('SONG_STARTED', song)
socketService.broadcast('SOCKET_SONG', songStore.generateDataToBroadcast(song))
this.getPlayer().restart()
try {
await this.getPlayer().media.play()
} catch (error) {
// convert this into a warning, as an error will cause Cypress to fail the tests entirely
console.warn(error)
}
},
/**
* The next song in the queue.
* If we're in REPEAT_ALL mode and there's no next song, just get the first song.
*/
get next () {
if (queueStore.next) {
return queueStore.next
}
if (preferences.repeatMode === 'REPEAT_ALL') {
return queueStore.first
}
},
/**
* The previous song in the queue.
* If we're in REPEAT_ALL mode and there's no prev song, get the last song.
*/
get previous (): Song | undefined {
if (queueStore.previous) {
return queueStore.previous
}
if (preferences.repeatMode === 'REPEAT_ALL') {
return queueStore.last
}
},
/**
* Circle through the repeat mode.
* The selected mode will be stored into local storage as well.
*/
changeRepeatMode () {
let index = this.repeatModes.indexOf(preferences.repeatMode) + 1
if (index >= this.repeatModes.length) {
index = 0
}
preferences.repeatMode = this.repeatModes[index]
},
/**
* Play the prev song in the queue, if one is found.
* If the prev song is not found and the current mode is NO_REPEAT, we stop completely.
*/
async playPrev () {
console.log('called')
// If the song's duration is greater than 5 seconds and we've passed 5 seconds into it,
// restart playing instead.
if (this.getPlayer().media.currentTime > 5 && queueStore.current!.length > 5) {
this.getPlayer().restart()
return
}
if (!this.previous && preferences.repeatMode === 'NO_REPEAT') {
this.stop()
} else {
await this.play(this.previous)
}
},
/**
* Play the next song in the queue, if one is found.
* If the next song is not found and the current mode is NO_REPEAT, we stop completely.
*/
async playNext () {
if (!this.next && preferences.repeatMode === 'NO_REPEAT') {
this.stop() // Nothing lasts forever, even cold November rain.
} else {
await this.play(this.next)
}
},
/**
* @param {Number} volume 0-10
* @param {Boolean=true} persist Whether the volume should be saved into local storage
*/
setVolume (volume: number, persist = true) {
this.getPlayer().setVolume(volume)
if (persist) {
preferences.volume = volume
}
this.volumeInput.value = String(volume)
},
mute () {
this.setVolume(0, false)
},
unmute () {
preferences.volume = preferences.volume || DEFAULT_VOLUME_VALUE
this.setVolume(preferences.volume)
},
stop () {
document.title = 'Koel'
this.getPlayer().pause()
this.getPlayer().seek(0)
if (queueStore.current) {
queueStore.current.playbackState = 'Stopped'
}
socketService.broadcast('SOCKET_PLAYBACK_STOPPED')
},
pause () {
this.getPlayer().pause()
queueStore.current!.playbackState = 'Paused'
socketService.broadcast('SOCKET_SONG', songStore.generateDataToBroadcast(queueStore.current!))
},
async resume () {
try {
await this.getPlayer().media.play()
} catch (error) {
console.error(error)
}
queueStore.current!.playbackState = 'Playing'
eventBus.emit('SONG_STARTED', queueStore.current)
socketService.broadcast('SOCKET_SONG', songStore.generateDataToBroadcast(queueStore.current!))
},
async toggle () {
if (!queueStore.current) {
await this.playFirstInQueue()
return
}
if (queueStore.current.playbackState !== 'Playing') {
await this.resume()
return
}
this.pause()
},
/**
* Queue up songs (replace them into the queue) and start playing right away.
*
* @param {?Song[]} songs An array of song objects. Defaults to all songs if null.
* @param {Boolean=false} shuffled Whether to shuffle the songs before playing.
*/
async queueAndPlay (songs?: Song[], shuffled = false) {
if (!songs) {
songs = shuffle(songStore.all)
}
if (!songs.length) {
return
}
if (shuffled) {
songs = shuffle(songs)
}
queueStore.replaceQueueWith(songs)
// Wait for the DOM to complete updating and play the first song in the queue.
await nextTick()
router.go('queue')
await this.play(queueStore.first)
},
async shuffleLibrary () {
await this.queueAndPlay(songStore.all, true)
},
getPlayer () {
return this.player!
},
/**
* Play the first song in the queue.
* If the current queue is empty, try creating it by shuffling all songs.
*/
async playFirstInQueue () {
queueStore.all.length ? await this.play(queueStore.first) : await this.shuffleLibrary()
},
async playAllByArtist (artist: Artist, shuffled = true) {
shuffled
? await this.queueAndPlay(artist.songs, true /* shuffled */)
: await this.queueAndPlay(orderBy(artist.songs, ['album_id', 'disc', 'track']))
},
async playAllInAlbum (album: Album, shuffled = true) {
shuffled
? await this.queueAndPlay(album.songs, true /* shuffled */)
: await this.queueAndPlay(orderBy(album.songs, ['disc', 'track']))
}
}