client/src/standalone/videos/embed.ts

   1 import './embed.scss'
   2
   3 import 'core-js/es6/symbol'
   4 import 'core-js/es6/object'
   5 import 'core-js/es6/function'
   6 import 'core-js/es6/parse-int'
   7 import 'core-js/es6/parse-float'
   8 import 'core-js/es6/number'
   9 import 'core-js/es6/math'
  10 import 'core-js/es6/string'
  11 import 'core-js/es6/date'
  12 import 'core-js/es6/array'
  13 import 'core-js/es6/regexp'
  14 import 'core-js/es6/map'
  15 import 'core-js/es6/weak-map'
  16 import 'core-js/es6/set'
  17 // For google bot that uses Chrome 41 and does not understand fetch
  18 import 'whatwg-fetch'
  19
  20 import * as vjs from 'video.js'
  21 import * as Channel from 'jschannel'
  22
  23 import { ResultList, VideoDetails } from '../../../../shared'
  24 import { addContextMenu, getVideojsOptions, loadLocale } from '../../assets/player/peertube-player'
  25 import { PeerTubeResolution } from '../player/definitions'
  26 import { VideoJSCaption } from '../../assets/player/peertube-videojs-typings'
  27 import { VideoCaption } from '../../../../shared/models/videos/caption/video-caption.model'
  28
  29 /**
  30  * Embed API exposes control of the embed player to the outside world via
  31  * JSChannels and window.postMessage
  32  */
  33 class PeerTubeEmbedApi {
  34   private channel: Channel.MessagingChannel
  35   private isReady = false
  36   private resolutions: PeerTubeResolution[] = null
  37
  38   constructor (private embed: PeerTubeEmbed) {
  39   }
  40
  41   initialize () {
  42     this.constructChannel()
  43     this.setupStateTracking()
  44
  45     // We're ready!
  46
  47     this.notifyReady()
  48   }
  49
  50   private get element () {
  51     return this.embed.videoElement
  52   }
  53
  54   private constructChannel () {
  55     let channel = Channel.build({ window: window.parent, origin: '*', scope: this.embed.scope })
  56
  57     channel.bind('play', (txn, params) => this.embed.player.play())
  58     channel.bind('pause', (txn, params) => this.embed.player.pause())
  59     channel.bind('seek', (txn, time) => this.embed.player.currentTime(time))
  60     channel.bind('setVolume', (txn, value) => this.embed.player.volume(value))
  61     channel.bind('getVolume', (txn, value) => this.embed.player.volume())
  62     channel.bind('isReady', (txn, params) => this.isReady)
  63     channel.bind('setResolution', (txn, resolutionId) => this.setResolution(resolutionId))
  64     channel.bind('getResolutions', (txn, params) => this.resolutions)
  65     channel.bind('setPlaybackRate', (txn, playbackRate) => this.embed.player.playbackRate(playbackRate))
  66     channel.bind('getPlaybackRate', (txn, params) => this.embed.player.playbackRate())
  67     channel.bind('getPlaybackRates', (txn, params) => this.embed.playerOptions.playbackRates)
  68
  69     this.channel = channel
  70   }
  71
  72   private setResolution (resolutionId: number) {
  73     if (resolutionId === -1 && this.embed.player.peertube().isAutoResolutionForbidden()) return
  74
  75     // Auto resolution
  76     if (resolutionId === -1) {
  77       this.embed.player.peertube().enableAutoResolution()
  78       return
  79     }
  80
  81     this.embed.player.peertube().disableAutoResolution()
  82     this.embed.player.peertube().updateResolution(resolutionId)
  83   }
  84
  85   /**
  86    * Let the host know that we're ready to go!
  87    */
  88   private notifyReady () {
  89     this.isReady = true
  90     this.channel.notify({ method: 'ready', params: true })
  91   }
  92
  93   private setupStateTracking () {
  94     let currentState: 'playing' | 'paused' | 'unstarted' = 'unstarted'
  95
  96     setInterval(() => {
  97       let position = this.element.currentTime
  98       let volume = this.element.volume
  99
 100       this.channel.notify({
 101         method: 'playbackStatusUpdate',
 102         params: {
 103           position,
 104           volume,
 105           playbackState: currentState
 106         }
 107       })
 108     }, 500)
 109
 110     this.element.addEventListener('play', ev => {
 111       currentState = 'playing'
 112       this.channel.notify({ method: 'playbackStatusChange', params: 'playing' })
 113     })
 114
 115     this.element.addEventListener('pause', ev => {
 116       currentState = 'paused'
 117       this.channel.notify({ method: 'playbackStatusChange', params: 'paused' })
 118     })
 119
 120     // PeerTube specific capabilities
 121
 122     this.embed.player.peertube().on('autoResolutionUpdate', () => this.loadResolutions())
 123     this.embed.player.peertube().on('videoFileUpdate', () => this.loadResolutions())
 124   }
 125
 126   private loadResolutions () {
 127     let resolutions = []
 128     let currentResolutionId = this.embed.player.peertube().getCurrentResolutionId()
 129
 130     for (const videoFile of this.embed.player.peertube().videoFiles) {
 131       let label = videoFile.resolution.label
 132       if (videoFile.fps && videoFile.fps >= 50) {
 133         label += videoFile.fps
 134       }
 135
 136       resolutions.push({
 137         id: videoFile.resolution.id,
 138         label,
 139         src: videoFile.magnetUri,
 140         active: videoFile.resolution.id === currentResolutionId
 141       })
 142     }
 143
 144     this.resolutions = resolutions
 145     this.channel.notify({
 146       method: 'resolutionUpdate',
 147       params: this.resolutions
 148     })
 149   }
 150 }
 151
 152 class PeerTubeEmbed {
 153   videoElement: HTMLVideoElement
 154   player: any
 155   playerOptions: any
 156   api: PeerTubeEmbedApi = null
 157   autoplay = false
 158   controls = true
 159   muted = false
 160   loop = false
 161   enableApi = false
 162   startTime: number | string = 0
 163   scope = 'peertube'
 164
 165   static async main () {
 166     const videoContainerId = 'video-container'
 167     const embed = new PeerTubeEmbed(videoContainerId)
 168     await embed.init()
 169   }
 170
 171   constructor (private videoContainerId: string) {
 172     this.videoElement = document.getElementById(videoContainerId) as HTMLVideoElement
 173   }
 174
 175   getVideoUrl (id: string) {
 176     return window.location.origin + '/api/v1/videos/' + id
 177   }
 178
 179   loadVideoInfo (videoId: string): Promise<Response> {
 180     return fetch(this.getVideoUrl(videoId))
 181   }
 182
 183   loadVideoCaptions (videoId: string): Promise<Response> {
 184     return fetch(this.getVideoUrl(videoId) + '/captions')
 185   }
 186
 187   removeElement (element: HTMLElement) {
 188     element.parentElement.removeChild(element)
 189   }
 190
 191   displayError (text: string) {
 192     // Remove video element
 193     if (this.videoElement) this.removeElement(this.videoElement)
 194
 195     document.title = 'Sorry - ' + text
 196
 197     const errorBlock = document.getElementById('error-block')
 198     errorBlock.style.display = 'flex'
 199
 200     const errorText = document.getElementById('error-content')
 201     errorText.innerHTML = text
 202   }
 203
 204   videoNotFound () {
 205     const text = 'This video does not exist.'
 206     this.displayError(text)
 207   }
 208
 209   videoFetchError () {
 210     const text = 'We cannot fetch the video. Please try again later.'
 211     this.displayError(text)
 212   }
 213
 214   getParamToggle (params: URLSearchParams, name: string, defaultValue: boolean) {
 215     return params.has(name) ? (params.get(name) === '1' || params.get(name) === 'true') : defaultValue
 216   }
 217
 218   getParamString (params: URLSearchParams, name: string, defaultValue: string) {
 219     return params.has(name) ? params.get(name) : defaultValue
 220   }
 221
 222   async init () {
 223     try {
 224       await this.initCore()
 225     } catch (e) {
 226       console.error(e)
 227     }
 228   }
 229
 230   private initializeApi () {
 231     if (!this.enableApi) return
 232
 233     this.api = new PeerTubeEmbedApi(this)
 234     this.api.initialize()
 235   }
 236
 237   private loadParams () {
 238     try {
 239       let params = new URL(window.location.toString()).searchParams
 240
 241       this.autoplay = this.getParamToggle(params, 'autoplay', this.autoplay)
 242       this.controls = this.getParamToggle(params, 'controls', this.controls)
 243       this.muted = this.getParamToggle(params, 'muted', this.muted)
 244       this.loop = this.getParamToggle(params, 'loop', this.loop)
 245       this.enableApi = this.getParamToggle(params, 'api', this.enableApi)
 246       this.scope = this.getParamString(params, 'scope', this.scope)
 247
 248       const startTimeParamString = params.get('start')
 249       if (startTimeParamString) this.startTime = startTimeParamString
 250     } catch (err) {
 251       console.error('Cannot get params from URL.', err)
 252     }
 253   }
 254
 255   private async initCore () {
 256     const urlParts = window.location.href.split('/')
 257     const lastPart = urlParts[ urlParts.length - 1 ]
 258     const videoId = lastPart.indexOf('?') === -1 ? lastPart : lastPart.split('?')[ 0 ]
 259
 260     await loadLocale(window.location.origin, vjs, navigator.language)
 261     const [ videoResponse, captionsResponse ] = await Promise.all([
 262       this.loadVideoInfo(videoId),
 263       this.loadVideoCaptions(videoId)
 264     ])
 265
 266     if (!videoResponse.ok) {
 267       if (videoResponse.status === 404) return this.videoNotFound()
 268
 269       return this.videoFetchError()
 270     }
 271
 272     const videoInfo: VideoDetails = await videoResponse.json()
 273     let videoCaptions: VideoJSCaption[] = []
 274     if (captionsResponse.ok) {
 275       const { data } = (await captionsResponse.json()) as ResultList<VideoCaption>
 276       videoCaptions = data.map(c => ({
 277         label: c.language.label,
 278         language: c.language.id,
 279         src: window.location.origin + c.captionPath
 280       }))
 281     }
 282
 283     this.loadParams()
 284
 285     const videojsOptions = getVideojsOptions({
 286       autoplay: this.autoplay,
 287       controls: this.controls,
 288       muted: this.muted,
 289       loop: this.loop,
 290       startTime: this.startTime,
 291
 292       videoCaptions,
 293       inactivityTimeout: 1500,
 294       videoViewUrl: this.getVideoUrl(videoId) + '/views',
 295       playerElement: this.videoElement,
 296       videoFiles: videoInfo.files,
 297       videoDuration: videoInfo.duration,
 298       enableHotkeys: true,
 299       peertubeLink: true,
 300       poster: window.location.origin + videoInfo.previewPath,
 301       theaterMode: false
 302     })
 303
 304     this.playerOptions = videojsOptions
 305     this.player = vjs(this.videoContainerId, videojsOptions, () => {
 306       this.player.on('customError', (event, data) => this.handleError(data.err))
 307
 308       window[ 'videojsPlayer' ] = this.player
 309
 310       if (this.controls) {
 311         this.player.dock({
 312           title: videoInfo.name,
 313           description: this.player.localize('Uses P2P, others may know your IP is downloading this video.')
 314         })
 315       }
 316
 317       addContextMenu(this.player, window.location.origin + videoInfo.embedPath)
 318
 319       this.initializeApi()
 320     })
 321   }
 322
 323   private handleError (err: Error) {
 324     if (err.message.indexOf('from xs param') !== -1) {
 325       this.player.dispose()
 326       this.videoElement = null
 327       this.displayError('This video is not available because the remote instance is not responding.')
 328       return
 329     }
 330   }
 331 }
 332
 333 PeerTubeEmbed.main()
 334   .catch(err => console.error('Cannot init embed.', err))