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 {
   5   ResultList,
   6   ServerConfig,
   7   UserRefreshToken,
   8   VideoCaption,
   9   VideoDetails,
  10   VideoPlaylist,
  11   VideoPlaylistElement,
  12   VideoStreamingPlaylistType,
  13   PluginType,
  14   ClientHookName
  15 } from '../../../../shared/models'
  16 import { HttpStatusCode } from '../../../../shared/core-utils/miscs/http-error-codes'
  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 { Hooks, loadPlugin, runHook } from '../../root-helpers/plugins'
  21 import { Tokens } from '../../root-helpers/users'
  22 import { peertubeLocalStorage } from '../../root-helpers/peertube-web-storage'
  23 import { objectToUrlEncoded } from '../../root-helpers/utils'
  24 import { PeerTubeEmbedApi } from './embed-api'
  25 import { RegisterClientHelpers } from '../../types/register-client-option.model'
  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   private translationsPromise: Promise<{ [id: string]: string }>
  60   private configPromise: Promise<ServerConfig>
  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 peertubeHooks: Hooks = {}
  70   private loadedScripts = new Set<string>()
  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
  82   getVideoUrl (id: string) {
  83     return window.location.origin + '/api/v1/videos/' + id
  84   }
  85
  86   refreshFetch (url: string, options?: RequestInit) {
  87     return fetch(url, options)
  88       .then((res: Response) => {
  89         if (res.status !== HttpStatusCode.UNAUTHORIZED_401) return res
  90
  91         const refreshingTokenPromise = new Promise<void>((resolve, reject) => {
  92           const clientId: string = peertubeLocalStorage.getItem(this.LOCAL_STORAGE_OAUTH_CLIENT_KEYS.CLIENT_ID)
  93           const clientSecret: string = peertubeLocalStorage.getItem(this.LOCAL_STORAGE_OAUTH_CLIENT_KEYS.CLIENT_SECRET)
  94
  95           const headers = new Headers()
  96           headers.set('Content-Type', 'application/x-www-form-urlencoded')
  97
  98           const data = {
  99             refresh_token: this.userTokens.refreshToken,
 100             client_id: clientId,
 101             client_secret: clientSecret,
 102             response_type: 'code',
 103             grant_type: 'refresh_token'
 104           }
 105
 106           fetch('/api/v1/users/token', {
 107             headers,
 108             method: 'POST',
 109             body: objectToUrlEncoded(data)
 110           }).then(res => {
 111             if (res.status === HttpStatusCode.UNAUTHORIZED_401) return undefined
 112
 113             return res.json()
 114           }).then((obj: UserRefreshToken & { code: 'invalid_grant'}) => {
 115             if (!obj || obj.code === 'invalid_grant') {
 116               Tokens.flush()
 117               this.removeTokensFromHeaders()
 118
 119               return resolve()
 120             }
 121
 122             this.userTokens.accessToken = obj.access_token
 123             this.userTokens.refreshToken = obj.refresh_token
 124             this.userTokens.save()
 125
 126             this.setHeadersFromTokens()
 127
 128             resolve()
 129           }).catch((refreshTokenError: any) => {
 130             reject(refreshTokenError)
 131           })
 132         })
 133
 134         return refreshingTokenPromise
 135           .catch(() => {
 136             Tokens.flush()
 137
 138             this.removeTokensFromHeaders()
 139           }).then(() => fetch(url, {
 140             ...options,
 141             headers: this.headers
 142           }))
 143       })
 144   }
 145
 146   getPlaylistUrl (id: string) {
 147     return window.location.origin + '/api/v1/video-playlists/' + id
 148   }
 149
 150   loadVideoInfo (videoId: string): Promise<Response> {
 151     return this.refreshFetch(this.getVideoUrl(videoId), { headers: this.headers })
 152   }
 153
 154   loadVideoCaptions (videoId: string): Promise<Response> {
 155     return this.refreshFetch(this.getVideoUrl(videoId) + '/captions', { headers: this.headers })
 156   }
 157
 158   loadPlaylistInfo (playlistId: string): Promise<Response> {
 159     return this.refreshFetch(this.getPlaylistUrl(playlistId), { headers: this.headers })
 160   }
 161
 162   loadPlaylistElements (playlistId: string, start = 0): Promise<Response> {
 163     const url = new URL(this.getPlaylistUrl(playlistId) + '/videos')
 164     url.search = new URLSearchParams({ start: '' + start, count: '100' }).toString()
 165
 166     return this.refreshFetch(url.toString(), { headers: this.headers })
 167   }
 168
 169   loadConfig (): Promise<ServerConfig> {
 170     return this.refreshFetch('/api/v1/config')
 171       .then(res => res.json())
 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     const videoInfoPromise = videoResponse.json()
 470       .then((videoInfo: VideoDetails) => {
 471         if (!alreadyHadPlayer) this.loadPlaceholder(videoInfo)
 472
 473         return videoInfo
 474       })
 475
 476     const [ videoInfoTmp, serverTranslations, captionsResponse, config, PeertubePlayerManagerModule ] = await Promise.all([
 477       videoInfoPromise,
 478       this.translationsPromise,
 479       captionsPromise,
 480       this.configPromise,
 481       this.PeertubePlayerManagerModulePromise
 482     ])
 483
 484     await this.ensurePluginsAreLoaded(config, serverTranslations)
 485
 486     const videoInfo: VideoDetails = videoInfoTmp
 487
 488     const PeertubePlayerManager = PeertubePlayerManagerModule.PeertubePlayerManager
 489     const videoCaptions = await this.buildCaptions(serverTranslations, captionsResponse)
 490
 491     this.loadParams(videoInfo)
 492
 493     const playlistPlugin = this.currentPlaylistElement
 494       ? {
 495         elements: this.playlistElements,
 496         playlist: this.playlist,
 497
 498         getCurrentPosition: () => this.currentPlaylistElement.position,
 499
 500         onItemClicked: (videoPlaylistElement: VideoPlaylistElement) => {
 501           this.currentPlaylistElement = videoPlaylistElement
 502
 503           this.loadVideoAndBuildPlayer(this.currentPlaylistElement.video.uuid)
 504             .catch(err => console.error(err))
 505         }
 506       }
 507       : undefined
 508
 509     const options: PeertubePlayerManagerOptions = {
 510       common: {
 511         // Autoplay in playlist mode
 512         autoplay: alreadyHadPlayer ? true : this.autoplay,
 513         controls: this.controls,
 514         muted: this.muted,
 515         loop: this.loop,
 516
 517         captions: videoCaptions.length !== 0,
 518         subtitle: this.subtitle,
 519
 520         startTime: this.playlist ? this.currentPlaylistElement.startTimestamp : this.startTime,
 521         stopTime: this.playlist ? this.currentPlaylistElement.stopTimestamp : this.stopTime,
 522
 523         nextVideo: this.playlist ? () => this.playNextVideo() : undefined,
 524         hasNextVideo: this.playlist ? () => !!this.getNextPlaylistElement() : undefined,
 525
 526         previousVideo: this.playlist ? () => this.playPreviousVideo() : undefined,
 527         hasPreviousVideo: this.playlist ? () => !!this.getPreviousPlaylistElement() : undefined,
 528
 529         playlist: playlistPlugin,
 530
 531         videoCaptions,
 532         inactivityTimeout: 2500,
 533         videoViewUrl: this.getVideoUrl(videoInfo.uuid) + '/views',
 534         videoUUID: videoInfo.uuid,
 535
 536         isLive: videoInfo.isLive,
 537
 538         playerElement: this.playerElement,
 539         onPlayerElementChange: (element: HTMLVideoElement) => this.playerElement = element,
 540
 541         videoDuration: videoInfo.duration,
 542         enableHotkeys: true,
 543         peertubeLink: this.peertubeLink,
 544         poster: window.location.origin + videoInfo.previewPath,
 545         theaterButton: false,
 546
 547         serverUrl: window.location.origin,
 548         language: navigator.language,
 549         embedUrl: window.location.origin + videoInfo.embedPath,
 550         embedTitle: videoInfo.name
 551       },
 552
 553       webtorrent: {
 554         videoFiles: videoInfo.files
 555       }
 556     }
 557
 558     if (this.mode === 'p2p-media-loader') {
 559       const hlsPlaylist = videoInfo.streamingPlaylists.find(p => p.type === VideoStreamingPlaylistType.HLS)
 560
 561       Object.assign(options, {
 562         p2pMediaLoader: {
 563           playlistUrl: hlsPlaylist.playlistUrl,
 564           segmentsSha256Url: hlsPlaylist.segmentsSha256Url,
 565           redundancyBaseUrls: hlsPlaylist.redundancies.map(r => r.baseUrl),
 566           trackerAnnounce: videoInfo.trackerUrls,
 567           videoFiles: hlsPlaylist.files
 568         } as P2PMediaLoaderOptions
 569       })
 570     }
 571
 572     this.player = await PeertubePlayerManager.initialize(this.mode, options, (player: videojs.Player) => this.player = player)
 573     this.player.on('customError', (event: any, data: any) => this.handleError(data.err, serverTranslations))
 574
 575     window[ 'videojsPlayer' ] = this.player
 576
 577     this.buildCSS()
 578
 579     await this.buildDock(videoInfo, config)
 580
 581     this.initializeApi()
 582
 583     this.removePlaceholder()
 584
 585     if (this.isPlaylistEmbed()) {
 586       await this.buildPlaylistManager()
 587
 588       this.player.playlist().updateSelected()
 589
 590       this.player.on('stopped', () => {
 591         this.playNextVideo()
 592       })
 593     }
 594
 595     this.runHook('action:embed.player.loaded', undefined, { player: this.player, videojs, video: videoInfo })
 596   }
 597
 598   private async initCore () {
 599     if (this.userTokens) this.setHeadersFromTokens()
 600
 601     this.configPromise = this.loadConfig()
 602     this.translationsPromise = TranslationsManager.getServerTranslations(window.location.origin, navigator.language)
 603     this.PeertubePlayerManagerModulePromise = import('../../assets/player/peertube-player-manager')
 604
 605     let videoId: string
 606
 607     if (this.isPlaylistEmbed()) {
 608       const playlistId = this.getResourceId()
 609       const res = await this.loadPlaylist(playlistId)
 610       if (!res) return undefined
 611
 612       this.playlist = await res.playlistResponse.json()
 613
 614       const playlistElementResult = await res.videosResponse.json()
 615       this.playlistElements = await this.loadAllPlaylistVideos(playlistId, playlistElementResult)
 616
 617       const params = new URL(window.location.toString()).searchParams
 618       const playlistPositionParam = this.getParamString(params, 'playlistPosition')
 619
 620       let position = 1
 621
 622       if (playlistPositionParam) {
 623         position = parseInt(playlistPositionParam + '', 10)
 624       }
 625
 626       this.currentPlaylistElement = this.playlistElements.find(e => e.position === position)
 627       if (!this.currentPlaylistElement || !this.currentPlaylistElement.video) {
 628         console.error('Current playlist element is not valid.', this.currentPlaylistElement)
 629         this.currentPlaylistElement = this.getNextPlaylistElement()
 630       }
 631
 632       if (!this.currentPlaylistElement) {
 633         console.error('This playlist does not have any valid element.')
 634         const serverTranslations = await this.translationsPromise
 635         this.playlistFetchError(serverTranslations)
 636         return
 637       }
 638
 639       videoId = this.currentPlaylistElement.video.uuid
 640     } else {
 641       videoId = this.getResourceId()
 642     }
 643
 644     return this.loadVideoAndBuildPlayer(videoId)
 645   }
 646
 647   private handleError (err: Error, translations?: { [ id: string ]: string }) {
 648     if (err.message.indexOf('from xs param') !== -1) {
 649       this.player.dispose()
 650       this.playerElement = null
 651       this.displayError('This video is not available because the remote instance is not responding.', translations)
 652       return
 653     }
 654   }
 655
 656   private async buildDock (videoInfo: VideoDetails, config: ServerConfig) {
 657     if (!this.controls) return
 658
 659     // On webtorrent fallback, player may have been disposed
 660     if (!this.player.player_) return
 661
 662     const title = this.title ? videoInfo.name : undefined
 663
 664     const description = config.tracker.enabled && this.warningTitle
 665       ? '<span class="text">' + peertubeTranslate('Watching this video may reveal your IP address to others.') + '</span>'
 666       : undefined
 667
 668     if (title || description) {
 669       this.player.dock({
 670         title,
 671         description
 672       })
 673     }
 674   }
 675
 676   private buildCSS () {
 677     const body = document.getElementById('custom-css')
 678
 679     if (this.bigPlayBackgroundColor) {
 680       body.style.setProperty('--embedBigPlayBackgroundColor', this.bigPlayBackgroundColor)
 681     }
 682
 683     if (this.foregroundColor) {
 684       body.style.setProperty('--embedForegroundColor', this.foregroundColor)
 685     }
 686   }
 687
 688   private async buildCaptions (serverTranslations: any, captionsResponse: Response): Promise<VideoJSCaption[]> {
 689     if (captionsResponse.ok) {
 690       const { data } = (await captionsResponse.json()) as ResultList<VideoCaption>
 691
 692       return data.map(c => ({
 693         label: peertubeTranslate(c.language.label, serverTranslations),
 694         language: c.language.id,
 695         src: window.location.origin + c.captionPath
 696       }))
 697     }
 698
 699     return []
 700   }
 701
 702   private loadPlaceholder (video: VideoDetails) {
 703     const placeholder = this.getPlaceholderElement()
 704
 705     const url = window.location.origin + video.previewPath
 706     placeholder.style.backgroundImage = `url("${url}")`
 707     placeholder.style.display = 'block'
 708   }
 709
 710   private removePlaceholder () {
 711     const placeholder = this.getPlaceholderElement()
 712     placeholder.style.display = 'none'
 713   }
 714
 715   private getPlaceholderElement () {
 716     return document.getElementById('placeholder-preview')
 717   }
 718
 719   private setHeadersFromTokens () {
 720     this.headers.set('Authorization', `${this.userTokens.tokenType} ${this.userTokens.accessToken}`)
 721   }
 722
 723   private removeTokensFromHeaders () {
 724     this.headers.delete('Authorization')
 725   }
 726
 727   private getResourceId () {
 728     const urlParts = window.location.pathname.split('/')
 729     return urlParts[ urlParts.length - 1 ]
 730   }
 731
 732   private isPlaylistEmbed () {
 733     return window.location.pathname.split('/')[1] === 'video-playlists'
 734   }
 735
 736   private async ensurePluginsAreLoaded (config: ServerConfig, translations?: { [ id: string ]: string }) {
 737     if (config.plugin.registered.length === 0) return
 738
 739     for (const plugin of config.plugin.registered) {
 740       for (const key of Object.keys(plugin.clientScripts)) {
 741         const clientScript = plugin.clientScripts[key]
 742
 743         if (clientScript.scopes.includes('embed') === false) continue
 744
 745         const script = `/plugins/${plugin.name}/${plugin.version}/client-scripts/${clientScript.script}`
 746
 747         if (this.loadedScripts.has(script)) continue
 748
 749         const pluginInfo = {
 750           plugin,
 751           clientScript: {
 752             script,
 753             scopes: clientScript.scopes
 754           },
 755           pluginType: PluginType.PLUGIN,
 756           isTheme: false
 757         }
 758
 759         await loadPlugin({
 760           hooks: this.peertubeHooks,
 761           pluginInfo,
 762           onSettingsScripts: () => undefined,
 763           peertubeHelpersFactory: _ => this.buildPeerTubeHelpers(translations)
 764         })
 765       }
 766     }
 767   }
 768
 769   private buildPeerTubeHelpers (translations?: { [ id: string ]: string }): RegisterClientHelpers {
 770     function unimplemented (): any {
 771       throw new Error('This helper is not implemented in embed.')
 772     }
 773
 774     return {
 775       getBaseStaticRoute: unimplemented,
 776
 777       getSettings: unimplemented,
 778
 779       isLoggedIn: unimplemented,
 780
 781       notifier: {
 782         info: unimplemented,
 783         error: unimplemented,
 784         success: unimplemented
 785       },
 786
 787       showModal: unimplemented,
 788
 789       getServerConfig: unimplemented,
 790
 791       markdownRenderer: {
 792         textMarkdownToHTML: unimplemented,
 793         enhancedMarkdownToHTML: unimplemented
 794       },
 795
 796       translate: (value: string) => {
 797         return Promise.resolve(peertubeTranslate(value, translations))
 798       }
 799     }
 800   }
 801
 802   private runHook <T> (hookName: ClientHookName, result?: T, params?: any): Promise<T> {
 803     return runHook(this.peertubeHooks, hookName, result, params)
 804   }
 805 }
 806
 807 PeerTubeEmbed.main()
 808   .catch(err => console.error('Cannot init embed.', err))