client/src/standalone/videos/embed.ts

   1 import './embed.scss'
   2 import videojs from 'video.js'
   3 import { peertubeTranslate } from '../../../../shared/core-utils/i18n'
   4 import { HttpStatusCode } from '../../../../shared/core-utils/miscs/http-error-codes'
   5 import {
   6   HTMLServerConfig,
   7   OAuth2ErrorCode,
   8   ResultList,
   9   UserRefreshToken,
  10   VideoCaption,
  11   VideoDetails,
  12   VideoPlaylist,
  13   VideoPlaylistElement,
  14   VideoStreamingPlaylistType
  15 } from '../../../../shared/models'
  16 import { P2PMediaLoaderOptions, PeertubePlayerManagerOptions, PlayerMode } from '../../assets/player/peertube-player-manager'
  17 import { VideoJSCaption } from '../../assets/player/peertube-videojs-typings'
  18 import { TranslationsManager } from '../../assets/player/translations-manager'
  19 import { peertubeLocalStorage } from '../../root-helpers/peertube-web-storage'
  20 import { PluginsManager } from '../../root-helpers/plugins-manager'
  21 import { Tokens } from '../../root-helpers/users'
  22 import { objectToUrlEncoded } from '../../root-helpers/utils'
  23 import { RegisterClientHelpers } from '../../types/register-client-option.model'
  24 import { PeerTubeEmbedApi } from './embed-api'
  25
  26 type Translations = { [ id: string ]: string }
  27
  28 export class PeerTubeEmbed {
  29   playerElement: HTMLVideoElement
  30   player: videojs.Player
  31   api: PeerTubeEmbedApi = null
  32
  33   autoplay: boolean
  34   controls: boolean
  35   muted: boolean
  36   loop: boolean
  37   subtitle: string
  38   enableApi = false
  39   startTime: number | string = 0
  40   stopTime: number | string
  41
  42   title: boolean
  43   warningTitle: boolean
  44   peertubeLink: boolean
  45   bigPlayBackgroundColor: string
  46   foregroundColor: string
  47
  48   mode: PlayerMode
  49   scope = 'peertube'
  50
  51   userTokens: Tokens
  52   headers = new Headers()
  53   LOCAL_STORAGE_OAUTH_CLIENT_KEYS = {
  54     CLIENT_ID: 'client_id',
  55     CLIENT_SECRET: 'client_secret'
  56   }
  57
  58   config: HTMLServerConfig
  59
  60   private translationsPromise: Promise<{ [id: string]: string }>
  61   private PeertubePlayerManagerModulePromise: Promise<any>
  62
  63   private playlist: VideoPlaylist
  64   private playlistElements: VideoPlaylistElement[]
  65   private currentPlaylistElement: VideoPlaylistElement
  66
  67   private wrapperElement: HTMLElement
  68
  69   private pluginsManager: PluginsManager
  70
  71   static async main () {
  72     const videoContainerId = 'video-wrapper'
  73     const embed = new PeerTubeEmbed(videoContainerId)
  74     await embed.init()
  75   }
  76
  77   constructor (private videoWrapperId: string) {
  78     this.wrapperElement = document.getElementById(this.videoWrapperId)
  79
  80     try {
  81       this.config = JSON.parse(window['PeerTubeServerConfig'])
  82     } catch (err) {
  83       console.error('Cannot parse HTML config.', err)
  84     }
  85   }
  86
  87   getVideoUrl (id: string) {
  88     return window.location.origin + '/api/v1/videos/' + id
  89   }
  90
  91   refreshFetch (url: string, options?: RequestInit) {
  92     return fetch(url, options)
  93       .then((res: Response) => {
  94         if (res.status !== HttpStatusCode.UNAUTHORIZED_401) return res
  95
  96         const refreshingTokenPromise = new Promise<void>((resolve, reject) => {
  97           const clientId: string = peertubeLocalStorage.getItem(this.LOCAL_STORAGE_OAUTH_CLIENT_KEYS.CLIENT_ID)
  98           const clientSecret: string = peertubeLocalStorage.getItem(this.LOCAL_STORAGE_OAUTH_CLIENT_KEYS.CLIENT_SECRET)
  99
 100           const headers = new Headers()
 101           headers.set('Content-Type', 'application/x-www-form-urlencoded')
 102
 103           const data = {
 104             refresh_token: this.userTokens.refreshToken,
 105             client_id: clientId,
 106             client_secret: clientSecret,
 107             response_type: 'code',
 108             grant_type: 'refresh_token'
 109           }
 110
 111           fetch('/api/v1/users/token', {
 112             headers,
 113             method: 'POST',
 114             body: objectToUrlEncoded(data)
 115           }).then(res => {
 116             if (res.status === HttpStatusCode.UNAUTHORIZED_401) return undefined
 117
 118             return res.json()
 119           }).then((obj: UserRefreshToken & { code?: OAuth2ErrorCode }) => {
 120             if (!obj || obj.code === OAuth2ErrorCode.INVALID_GRANT) {
 121               Tokens.flush()
 122               this.removeTokensFromHeaders()
 123
 124               return resolve()
 125             }
 126
 127             this.userTokens.accessToken = obj.access_token
 128             this.userTokens.refreshToken = obj.refresh_token
 129             this.userTokens.save()
 130
 131             this.setHeadersFromTokens()
 132
 133             resolve()
 134           }).catch((refreshTokenError: any) => {
 135             reject(refreshTokenError)
 136           })
 137         })
 138
 139         return refreshingTokenPromise
 140           .catch(() => {
 141             Tokens.flush()
 142
 143             this.removeTokensFromHeaders()
 144           }).then(() => fetch(url, {
 145             ...options,
 146             headers: this.headers
 147           }))
 148       })
 149   }
 150
 151   getPlaylistUrl (id: string) {
 152     return window.location.origin + '/api/v1/video-playlists/' + id
 153   }
 154
 155   loadVideoInfo (videoId: string): Promise<Response> {
 156     return this.refreshFetch(this.getVideoUrl(videoId), { headers: this.headers })
 157   }
 158
 159   loadVideoCaptions (videoId: string): Promise<Response> {
 160     return this.refreshFetch(this.getVideoUrl(videoId) + '/captions', { headers: this.headers })
 161   }
 162
 163   loadPlaylistInfo (playlistId: string): Promise<Response> {
 164     return this.refreshFetch(this.getPlaylistUrl(playlistId), { headers: this.headers })
 165   }
 166
 167   loadPlaylistElements (playlistId: string, start = 0): Promise<Response> {
 168     const url = new URL(this.getPlaylistUrl(playlistId) + '/videos')
 169     url.search = new URLSearchParams({ start: '' + start, count: '100' }).toString()
 170
 171     return this.refreshFetch(url.toString(), { headers: this.headers })
 172   }
 173
 174   removeElement (element: HTMLElement) {
 175     element.parentElement.removeChild(element)
 176   }
 177
 178   displayError (text: string, translations?: Translations) {
 179     // Remove video element
 180     if (this.playerElement) {
 181       this.removeElement(this.playerElement)
 182       this.playerElement = undefined
 183     }
 184
 185     const translatedText = peertubeTranslate(text, translations)
 186     const translatedSorry = peertubeTranslate('Sorry', translations)
 187
 188     document.title = translatedSorry + ' - ' + translatedText
 189
 190     const errorBlock = document.getElementById('error-block')
 191     errorBlock.style.display = 'flex'
 192
 193     const errorTitle = document.getElementById('error-title')
 194     errorTitle.innerHTML = peertubeTranslate('Sorry', translations)
 195
 196     const errorText = document.getElementById('error-content')
 197     errorText.innerHTML = translatedText
 198
 199     this.wrapperElement.style.display = 'none'
 200   }
 201
 202   videoNotFound (translations?: Translations) {
 203     const text = 'This video does not exist.'
 204     this.displayError(text, translations)
 205   }
 206
 207   videoFetchError (translations?: Translations) {
 208     const text = 'We cannot fetch the video. Please try again later.'
 209     this.displayError(text, translations)
 210   }
 211
 212   playlistNotFound (translations?: Translations) {
 213     const text = 'This playlist does not exist.'
 214     this.displayError(text, translations)
 215   }
 216
 217   playlistFetchError (translations?: Translations) {
 218     const text = 'We cannot fetch the playlist. Please try again later.'
 219     this.displayError(text, translations)
 220   }
 221
 222   getParamToggle (params: URLSearchParams, name: string, defaultValue?: boolean) {
 223     return params.has(name) ? (params.get(name) === '1' || params.get(name) === 'true') : defaultValue
 224   }
 225
 226   getParamString (params: URLSearchParams, name: string, defaultValue?: string) {
 227     return params.has(name) ? params.get(name) : defaultValue
 228   }
 229
 230   async playNextVideo () {
 231     const next = this.getNextPlaylistElement()
 232     if (!next) {
 233       console.log('Next element not found in playlist.')
 234       return
 235     }
 236
 237     this.currentPlaylistElement = next
 238
 239     return this.loadVideoAndBuildPlayer(this.currentPlaylistElement.video.uuid)
 240   }
 241
 242   async playPreviousVideo () {
 243     const previous = this.getPreviousPlaylistElement()
 244     if (!previous) {
 245       console.log('Previous element not found in playlist.')
 246       return
 247     }
 248
 249     this.currentPlaylistElement = previous
 250
 251     await this.loadVideoAndBuildPlayer(this.currentPlaylistElement.video.uuid)
 252   }
 253
 254   getCurrentPosition () {
 255     if (!this.currentPlaylistElement) return -1
 256
 257     return this.currentPlaylistElement.position
 258   }
 259
 260   async init () {
 261     try {
 262       this.userTokens = Tokens.load()
 263       await this.initCore()
 264     } catch (e) {
 265       console.error(e)
 266     }
 267   }
 268
 269   private initializeApi () {
 270     if (!this.enableApi) return
 271
 272     this.api = new PeerTubeEmbedApi(this)
 273     this.api.initialize()
 274   }
 275
 276   private loadParams (video: VideoDetails) {
 277     try {
 278       const params = new URL(window.location.toString()).searchParams
 279
 280       this.autoplay = this.getParamToggle(params, 'autoplay', false)
 281       this.controls = this.getParamToggle(params, 'controls', true)
 282       this.muted = this.getParamToggle(params, 'muted', undefined)
 283       this.loop = this.getParamToggle(params, 'loop', false)
 284       this.title = this.getParamToggle(params, 'title', true)
 285       this.enableApi = this.getParamToggle(params, 'api', this.enableApi)
 286       this.warningTitle = this.getParamToggle(params, 'warningTitle', true)
 287       this.peertubeLink = this.getParamToggle(params, 'peertubeLink', true)
 288
 289       this.scope = this.getParamString(params, 'scope', this.scope)
 290       this.subtitle = this.getParamString(params, 'subtitle')
 291       this.startTime = this.getParamString(params, 'start')
 292       this.stopTime = this.getParamString(params, 'stop')
 293
 294       this.bigPlayBackgroundColor = this.getParamString(params, 'bigPlayBackgroundColor')
 295       this.foregroundColor = this.getParamString(params, 'foregroundColor')
 296
 297       const modeParam = this.getParamString(params, 'mode')
 298
 299       if (modeParam) {
 300         if (modeParam === 'p2p-media-loader') this.mode = 'p2p-media-loader'
 301         else this.mode = 'webtorrent'
 302       } else {
 303         if (Array.isArray(video.streamingPlaylists) && video.streamingPlaylists.length !== 0) this.mode = 'p2p-media-loader'
 304         else this.mode = 'webtorrent'
 305       }
 306     } catch (err) {
 307       console.error('Cannot get params from URL.', err)
 308     }
 309   }
 310
 311   private async loadAllPlaylistVideos (playlistId: string, baseResult: ResultList<VideoPlaylistElement>) {
 312     let elements = baseResult.data
 313     let total = baseResult.total
 314     let i = 0
 315
 316     while (total > elements.length && i < 10) {
 317       const result = await this.loadPlaylistElements(playlistId, elements.length)
 318
 319       const json = await result.json() as ResultList<VideoPlaylistElement>
 320       total = json.total
 321
 322       elements = elements.concat(json.data)
 323       i++
 324     }
 325
 326     if (i === 10) {
 327       console.error('Cannot fetch all playlists elements, there are too many!')
 328     }
 329
 330     return elements
 331   }
 332
 333   private async loadPlaylist (playlistId: string) {
 334     const playlistPromise = this.loadPlaylistInfo(playlistId)
 335     const playlistElementsPromise = this.loadPlaylistElements(playlistId)
 336
 337     let playlistResponse: Response
 338     let isResponseOk: boolean
 339
 340     try {
 341       playlistResponse = await playlistPromise
 342       isResponseOk = playlistResponse.status === HttpStatusCode.OK_200
 343     } catch (err) {
 344       console.error(err)
 345       isResponseOk = false
 346     }
 347
 348     if (!isResponseOk) {
 349       const serverTranslations = await this.translationsPromise
 350
 351       if (playlistResponse?.status === HttpStatusCode.NOT_FOUND_404) {
 352         this.playlistNotFound(serverTranslations)
 353         return undefined
 354       }
 355
 356       this.playlistFetchError(serverTranslations)
 357       return undefined
 358     }
 359
 360     return { playlistResponse, videosResponse: await playlistElementsPromise }
 361   }
 362
 363   private async loadVideo (videoId: string) {
 364     const videoPromise = this.loadVideoInfo(videoId)
 365
 366     let videoResponse: Response
 367     let isResponseOk: boolean
 368
 369     try {
 370       videoResponse = await videoPromise
 371       isResponseOk = videoResponse.status === HttpStatusCode.OK_200
 372     } catch (err) {
 373       console.error(err)
 374
 375       isResponseOk = false
 376     }
 377
 378     if (!isResponseOk) {
 379       const serverTranslations = await this.translationsPromise
 380
 381       if (videoResponse?.status === HttpStatusCode.NOT_FOUND_404) {
 382         this.videoNotFound(serverTranslations)
 383         return undefined
 384       }
 385
 386       this.videoFetchError(serverTranslations)
 387       return undefined
 388     }
 389
 390     const captionsPromise = this.loadVideoCaptions(videoId)
 391
 392     return { captionsPromise, videoResponse }
 393   }
 394
 395   private async buildPlaylistManager () {
 396     const translations = await this.translationsPromise
 397
 398     this.player.upnext({
 399       timeout: 10000, // 10s
 400       headText: peertubeTranslate('Up Next', translations),
 401       cancelText: peertubeTranslate('Cancel', translations),
 402       suspendedText: peertubeTranslate('Autoplay is suspended', translations),
 403       getTitle: () => this.nextVideoTitle(),
 404       next: () => this.playNextVideo(),
 405       condition: () => !!this.getNextPlaylistElement(),
 406       suspended: () => false
 407     })
 408   }
 409
 410   private async loadVideoAndBuildPlayer (uuid: string) {
 411     const res = await this.loadVideo(uuid)
 412     if (res === undefined) return
 413
 414     return this.buildVideoPlayer(res.videoResponse, res.captionsPromise)
 415   }
 416
 417   private nextVideoTitle () {
 418     const next = this.getNextPlaylistElement()
 419     if (!next) return ''
 420
 421     return next.video.name
 422   }
 423
 424   private getNextPlaylistElement (position?: number): VideoPlaylistElement {
 425     if (!position) position = this.currentPlaylistElement.position + 1
 426
 427     if (position > this.playlist.videosLength) {
 428       return undefined
 429     }
 430
 431     const next = this.playlistElements.find(e => e.position === position)
 432
 433     if (!next || !next.video) {
 434       return this.getNextPlaylistElement(position + 1)
 435     }
 436
 437     return next
 438   }
 439
 440   private getPreviousPlaylistElement (position?: number): VideoPlaylistElement {
 441     if (!position) position = this.currentPlaylistElement.position - 1
 442
 443     if (position < 1) {
 444       return undefined
 445     }
 446
 447     const prev = this.playlistElements.find(e => e.position === position)
 448
 449     if (!prev || !prev.video) {
 450       return this.getNextPlaylistElement(position - 1)
 451     }
 452
 453     return prev
 454   }
 455
 456   private async buildVideoPlayer (videoResponse: Response, captionsPromise: Promise<Response>) {
 457     let alreadyHadPlayer = false
 458
 459     if (this.player) {
 460       this.player.dispose()
 461       alreadyHadPlayer = true
 462     }
 463
 464     this.playerElement = document.createElement('video')
 465     this.playerElement.className = 'video-js vjs-peertube-skin'
 466     this.playerElement.setAttribute('playsinline', 'true')
 467     this.wrapperElement.appendChild(this.playerElement)
 468
 469     // Issue when we parsed config from HTML, fallback to API
 470     if (!this.config) {
 471       this.config = await this.refreshFetch('/api/v1/config')
 472                               .then(res => res.json())
 473     }
 474
 475     const videoInfoPromise = videoResponse.json()
 476       .then((videoInfo: VideoDetails) => {
 477         if (!alreadyHadPlayer) this.loadPlaceholder(videoInfo)
 478
 479         return videoInfo
 480       })
 481
 482     const [ videoInfoTmp, serverTranslations, captionsResponse, PeertubePlayerManagerModule ] = await Promise.all([
 483       videoInfoPromise,
 484       this.translationsPromise,
 485       captionsPromise,
 486       this.PeertubePlayerManagerModulePromise
 487     ])
 488
 489     await this.loadPlugins(serverTranslations)
 490
 491     const videoInfo: VideoDetails = videoInfoTmp
 492
 493     const PeertubePlayerManager = PeertubePlayerManagerModule.PeertubePlayerManager
 494     const videoCaptions = await this.buildCaptions(serverTranslations, captionsResponse)
 495
 496     this.loadParams(videoInfo)
 497
 498     const playlistPlugin = this.currentPlaylistElement
 499       ? {
 500         elements: this.playlistElements,
 501         playlist: this.playlist,
 502
 503         getCurrentPosition: () => this.currentPlaylistElement.position,
 504
 505         onItemClicked: (videoPlaylistElement: VideoPlaylistElement) => {
 506           this.currentPlaylistElement = videoPlaylistElement
 507
 508           this.loadVideoAndBuildPlayer(this.currentPlaylistElement.video.uuid)
 509             .catch(err => console.error(err))
 510         }
 511       }
 512       : undefined
 513
 514     const options: PeertubePlayerManagerOptions = {
 515       common: {
 516         // Autoplay in playlist mode
 517         autoplay: alreadyHadPlayer ? true : this.autoplay,
 518         controls: this.controls,
 519         muted: this.muted,
 520         loop: this.loop,
 521
 522         captions: videoCaptions.length !== 0,
 523         subtitle: this.subtitle,
 524
 525         startTime: this.playlist ? this.currentPlaylistElement.startTimestamp : this.startTime,
 526         stopTime: this.playlist ? this.currentPlaylistElement.stopTimestamp : this.stopTime,
 527
 528         nextVideo: this.playlist ? () => this.playNextVideo() : undefined,
 529         hasNextVideo: this.playlist ? () => !!this.getNextPlaylistElement() : undefined,
 530
 531         previousVideo: this.playlist ? () => this.playPreviousVideo() : undefined,
 532         hasPreviousVideo: this.playlist ? () => !!this.getPreviousPlaylistElement() : undefined,
 533
 534         playlist: playlistPlugin,
 535
 536         videoCaptions,
 537         inactivityTimeout: 2500,
 538         videoViewUrl: this.getVideoUrl(videoInfo.uuid) + '/views',
 539         videoUUID: videoInfo.uuid,
 540
 541         isLive: videoInfo.isLive,
 542
 543         playerElement: this.playerElement,
 544         onPlayerElementChange: (element: HTMLVideoElement) => this.playerElement = element,
 545
 546         videoDuration: videoInfo.duration,
 547         enableHotkeys: true,
 548         peertubeLink: this.peertubeLink,
 549         poster: window.location.origin + videoInfo.previewPath,
 550         theaterButton: false,
 551
 552         serverUrl: window.location.origin,
 553         language: navigator.language,
 554         embedUrl: window.location.origin + videoInfo.embedPath,
 555         embedTitle: videoInfo.name
 556       },
 557
 558       webtorrent: {
 559         videoFiles: videoInfo.files
 560       },
 561
 562       pluginsManager: this.pluginsManager
 563     }
 564
 565     if (this.mode === 'p2p-media-loader') {
 566       const hlsPlaylist = videoInfo.streamingPlaylists.find(p => p.type === VideoStreamingPlaylistType.HLS)
 567
 568       Object.assign(options, {
 569         p2pMediaLoader: {
 570           playlistUrl: hlsPlaylist.playlistUrl,
 571           segmentsSha256Url: hlsPlaylist.segmentsSha256Url,
 572           redundancyBaseUrls: hlsPlaylist.redundancies.map(r => r.baseUrl),
 573           trackerAnnounce: videoInfo.trackerUrls,
 574           videoFiles: hlsPlaylist.files
 575         } as P2PMediaLoaderOptions
 576       })
 577     }
 578
 579     this.player = await PeertubePlayerManager.initialize(this.mode, options, (player: videojs.Player) => this.player = player)
 580     this.player.on('customError', (event: any, data: any) => this.handleError(data.err, serverTranslations))
 581
 582     window[ 'videojsPlayer' ] = this.player
 583
 584     this.buildCSS()
 585
 586     await this.buildDock(videoInfo)
 587
 588     this.initializeApi()
 589
 590     this.removePlaceholder()
 591
 592     if (this.isPlaylistEmbed()) {
 593       await this.buildPlaylistManager()
 594
 595       this.player.playlist().updateSelected()
 596
 597       this.player.on('stopped', () => {
 598         this.playNextVideo()
 599       })
 600     }
 601
 602     this.pluginsManager.runHook('action:embed.player.loaded', undefined, { player: this.player, videojs, video: videoInfo })
 603   }
 604
 605   private async initCore () {
 606     if (this.userTokens) this.setHeadersFromTokens()
 607
 608     this.translationsPromise = TranslationsManager.getServerTranslations(window.location.origin, navigator.language)
 609     this.PeertubePlayerManagerModulePromise = import('../../assets/player/peertube-player-manager')
 610
 611     let videoId: string
 612
 613     if (this.isPlaylistEmbed()) {
 614       const playlistId = this.getResourceId()
 615       const res = await this.loadPlaylist(playlistId)
 616       if (!res) return undefined
 617
 618       this.playlist = await res.playlistResponse.json()
 619
 620       const playlistElementResult = await res.videosResponse.json()
 621       this.playlistElements = await this.loadAllPlaylistVideos(playlistId, playlistElementResult)
 622
 623       const params = new URL(window.location.toString()).searchParams
 624       const playlistPositionParam = this.getParamString(params, 'playlistPosition')
 625
 626       let position = 1
 627
 628       if (playlistPositionParam) {
 629         position = parseInt(playlistPositionParam + '', 10)
 630       }
 631
 632       this.currentPlaylistElement = this.playlistElements.find(e => e.position === position)
 633       if (!this.currentPlaylistElement || !this.currentPlaylistElement.video) {
 634         console.error('Current playlist element is not valid.', this.currentPlaylistElement)
 635         this.currentPlaylistElement = this.getNextPlaylistElement()
 636       }
 637
 638       if (!this.currentPlaylistElement) {
 639         console.error('This playlist does not have any valid element.')
 640         const serverTranslations = await this.translationsPromise
 641         this.playlistFetchError(serverTranslations)
 642         return
 643       }
 644
 645       videoId = this.currentPlaylistElement.video.uuid
 646     } else {
 647       videoId = this.getResourceId()
 648     }
 649
 650     return this.loadVideoAndBuildPlayer(videoId)
 651   }
 652
 653   private handleError (err: Error, translations?: { [ id: string ]: string }) {
 654     if (err.message.indexOf('from xs param') !== -1) {
 655       this.player.dispose()
 656       this.playerElement = null
 657       this.displayError('This video is not available because the remote instance is not responding.', translations)
 658       return
 659     }
 660   }
 661
 662   private async buildDock (videoInfo: VideoDetails) {
 663     if (!this.controls) return
 664
 665     // On webtorrent fallback, player may have been disposed
 666     if (!this.player.player_) return
 667
 668     const title = this.title ? videoInfo.name : undefined
 669
 670     const description = this.config.tracker.enabled && this.warningTitle
 671       ? '<span class="text">' + peertubeTranslate('Watching this video may reveal your IP address to others.') + '</span>'
 672       : undefined
 673
 674     if (title || description) {
 675       this.player.dock({
 676         title,
 677         description
 678       })
 679     }
 680   }
 681
 682   private buildCSS () {
 683     const body = document.getElementById('custom-css')
 684
 685     if (this.bigPlayBackgroundColor) {
 686       body.style.setProperty('--embedBigPlayBackgroundColor', this.bigPlayBackgroundColor)
 687     }
 688
 689     if (this.foregroundColor) {
 690       body.style.setProperty('--embedForegroundColor', this.foregroundColor)
 691     }
 692   }
 693
 694   private async buildCaptions (serverTranslations: any, captionsResponse: Response): Promise<VideoJSCaption[]> {
 695     if (captionsResponse.ok) {
 696       const { data } = (await captionsResponse.json()) as ResultList<VideoCaption>
 697
 698       return data.map(c => ({
 699         label: peertubeTranslate(c.language.label, serverTranslations),
 700         language: c.language.id,
 701         src: window.location.origin + c.captionPath
 702       }))
 703     }
 704
 705     return []
 706   }
 707
 708   private loadPlaceholder (video: VideoDetails) {
 709     const placeholder = this.getPlaceholderElement()
 710
 711     const url = window.location.origin + video.previewPath
 712     placeholder.style.backgroundImage = `url("${url}")`
 713     placeholder.style.display = 'block'
 714   }
 715
 716   private removePlaceholder () {
 717     const placeholder = this.getPlaceholderElement()
 718     placeholder.style.display = 'none'
 719   }
 720
 721   private getPlaceholderElement () {
 722     return document.getElementById('placeholder-preview')
 723   }
 724
 725   private setHeadersFromTokens () {
 726     this.headers.set('Authorization', `${this.userTokens.tokenType} ${this.userTokens.accessToken}`)
 727   }
 728
 729   private removeTokensFromHeaders () {
 730     this.headers.delete('Authorization')
 731   }
 732
 733   private getResourceId () {
 734     const urlParts = window.location.pathname.split('/')
 735     return urlParts[ urlParts.length - 1 ]
 736   }
 737
 738   private isPlaylistEmbed () {
 739     return window.location.pathname.split('/')[1] === 'video-playlists'
 740   }
 741
 742   private loadPlugins (translations?: { [ id: string ]: string }) {
 743     this.pluginsManager = new PluginsManager({
 744       peertubeHelpersFactory: _ => this.buildPeerTubeHelpers(translations)
 745     })
 746
 747     this.pluginsManager.loadPluginsList(this.config)
 748
 749     return this.pluginsManager.ensurePluginsAreLoaded('embed')
 750   }
 751
 752   private buildPeerTubeHelpers (translations?: { [ id: string ]: string }): RegisterClientHelpers {
 753     function unimplemented (): any {
 754       throw new Error('This helper is not implemented in embed.')
 755     }
 756
 757     return {
 758       getBaseStaticRoute: unimplemented,
 759
 760       getBaseRouterRoute: unimplemented,
 761
 762       getSettings: unimplemented,
 763
 764       isLoggedIn: unimplemented,
 765       getAuthHeader: unimplemented,
 766
 767       notifier: {
 768         info: unimplemented,
 769         error: unimplemented,
 770         success: unimplemented
 771       },
 772
 773       showModal: unimplemented,
 774
 775       getServerConfig: unimplemented,
 776
 777       markdownRenderer: {
 778         textMarkdownToHTML: unimplemented,
 779         enhancedMarkdownToHTML: unimplemented
 780       },
 781
 782       translate: (value: string) => {
 783         return Promise.resolve(peertubeTranslate(value, translations))
 784       }
 785     }
 786   }
 787 }
 788
 789 PeerTubeEmbed.main()
 790   .catch(err => console.error('Cannot init embed.', err))