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import './embed.scss'
import * as Channel from 'jschannel'
import { logger } from '../../root-helpers'
import { PeerTubeResolution, PeerTubeTextTrack } from '../player/definitions'
import { PeerTubeEmbed } from './embed'
/**
* Embed API exposes control of the embed player to the outside world via
* JSChannels and window.postMessage
*/
export class PeerTubeEmbedApi {
private channel: Channel.MessagingChannel
private isReady = false
private resolutions: PeerTubeResolution[] = []
private oldVideoElement: HTMLVideoElement
private videoElPlayListener: () => void
private videoElPauseListener: () => void
private videoElEndedListener: () => void
private videoElInterval: any
constructor (private readonly embed: PeerTubeEmbed) {
}
initialize () {
this.constructChannel()
this.setupStateTracking()
// We're ready!
this.notifyReady()
}
reInit () {
this.disposeStateTracking()
this.setupStateTracking()
}
private get element () {
return this.embed.getPlayerElement()
}
private constructChannel () {
const channel = Channel.build({ window: window.parent, origin: '*', scope: this.embed.getScope() })
channel.bind('play', (txn, params) => this.embed.player.play())
channel.bind('pause', (txn, params) => this.embed.player.pause())
channel.bind('seek', (txn, time) => this.embed.player.currentTime(time))
channel.bind('setVolume', (txn, value) => this.embed.player.volume(value))
channel.bind('getVolume', (txn, value) => this.embed.player.volume())
channel.bind('isReady', (txn, params) => this.isReady)
channel.bind('setResolution', (txn, resolutionId) => this.setResolution(resolutionId))
channel.bind('getResolutions', (txn, params) => this.resolutions)
channel.bind('getCaptions', (txn, params) => this.getCaptions())
channel.bind('setCaption', (txn, id) => this.setCaption(id))
channel.bind('setPlaybackRate', (txn, playbackRate) => this.embed.player.playbackRate(playbackRate))
channel.bind('getPlaybackRate', (txn, params) => this.embed.player.playbackRate())
channel.bind('getPlaybackRates', (txn, params) => this.embed.player.options_.playbackRates)
channel.bind('playNextVideo', (txn, params) => this.embed.playNextPlaylistVideo())
channel.bind('playPreviousVideo', (txn, params) => this.embed.playPreviousPlaylistVideo())
channel.bind('getCurrentPosition', (txn, params) => this.embed.getCurrentPlaylistPosition())
this.channel = channel
}
private setResolution (resolutionId: number) {
logger.info(`Set resolution ${resolutionId}`)
if (this.isWebtorrent()) {
if (resolutionId === -1 && this.embed.player.webtorrent().isAutoResolutionPossible() === false) return
this.embed.player.webtorrent().changeQuality(resolutionId)
return
}
this.embed.player.p2pMediaLoader().getHLSJS().currentLevel = resolutionId
}
private getCaptions (): PeerTubeTextTrack[] {
return this.embed.player.textTracks().tracks_.map(t => ({
id: t.id,
src: t.src,
label: t.label,
mode: t.mode
}))
}
private setCaption (id: string) {
const tracks = this.embed.player.textTracks().tracks_
for (const track of tracks) {
if (track.id === id) track.mode = 'showing'
else track.mode = 'disabled'
}
}
/**
* Let the host know that we're ready to go!
*/
private notifyReady () {
this.isReady = true
this.channel.notify({ method: 'ready', params: true })
}
private setupStateTracking () {
let currentState: 'playing' | 'paused' | 'unstarted' | 'ended' = 'unstarted'
this.videoElInterval = setInterval(() => {
const position = this.element.currentTime
const volume = this.element.volume
this.channel.notify({
method: 'playbackStatusUpdate',
params: {
position,
volume,
duration: this.embed.player.duration(),
playbackState: currentState
}
})
}, 500)
// ---------------------------------------------------------------------------
this.videoElPlayListener = () => {
currentState = 'playing'
this.channel.notify({ method: 'playbackStatusChange', params: 'playing' })
}
this.element.addEventListener('play', this.videoElPlayListener)
this.videoElPauseListener = () => {
currentState = 'paused'
this.channel.notify({ method: 'playbackStatusChange', params: 'paused' })
}
this.element.addEventListener('pause', this.videoElPauseListener)
this.videoElEndedListener = () => {
currentState = 'ended'
this.channel.notify({ method: 'playbackStatusChange', params: 'ended' })
}
this.element.addEventListener('ended', this.videoElEndedListener)
this.oldVideoElement = this.element
// ---------------------------------------------------------------------------
// PeerTube specific capabilities
this.embed.player.peertubeResolutions().on('resolutionsAdded', () => this.loadResolutions())
this.embed.player.peertubeResolutions().on('resolutionChanged', () => this.loadResolutions())
this.loadResolutions()
this.embed.player.on('volumechange', () => {
this.channel.notify({
method: 'volumeChange',
params: this.embed.player.volume()
})
})
}
private disposeStateTracking () {
if (!this.oldVideoElement) return
this.oldVideoElement.removeEventListener('play', this.videoElPlayListener)
this.oldVideoElement.removeEventListener('pause', this.videoElPauseListener)
this.oldVideoElement.removeEventListener('ended', this.videoElEndedListener)
clearInterval(this.videoElInterval)
this.oldVideoElement = undefined
}
private loadResolutions () {
this.resolutions = this.embed.player.peertubeResolutions().getResolutions()
.map(r => ({
id: r.id,
label: r.label,
active: r.selected,
width: r.width,
height: r.height
}))
this.channel.notify({
method: 'resolutionUpdate',
params: this.resolutions
})
}
private isWebtorrent () {
return !!this.embed.player.webtorrent
}
}
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