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