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