aboutsummaryrefslogtreecommitdiffhomepage
path: root/client/src/standalone/videos/embed.ts
blob: af98a1561d1bce848888a993008418975d7eeb82 (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
import './embed.scss'
import videojs from 'video.js'
import { peertubeTranslate } from '../../../../shared/core-utils/i18n'
import {
  ResultList,
  ServerConfig,
  UserRefreshToken,
  VideoCaption,
  VideoDetails,
  VideoPlaylist,
  VideoPlaylistElement,
  VideoStreamingPlaylistType,
  PluginType,
  ClientHookName
} from '../../../../shared/models'
import { P2PMediaLoaderOptions, PeertubePlayerManagerOptions, PlayerMode } from '../../assets/player/peertube-player-manager'
import { VideoJSCaption } from '../../assets/player/peertube-videojs-typings'
import { TranslationsManager } from '../../assets/player/translations-manager'
import { Hooks, loadPlugin, runHook } from '../../root-helpers/plugins'
import { Tokens } from '../../root-helpers/users'
import { peertubeLocalStorage } from '../../root-helpers/peertube-web-storage'
import { objectToUrlEncoded } from '../../root-helpers/utils'
import { PeerTubeEmbedApi } from './embed-api'
import { RegisterClientHelpers } from '../../types/register-client-option.model'

type Translations = { [ id: string ]: string }

export class PeerTubeEmbed {
  playerElement: HTMLVideoElement
  player: videojs.Player
  api: PeerTubeEmbedApi = null

  autoplay: boolean
  controls: boolean
  muted: boolean
  loop: boolean
  subtitle: string
  enableApi = false
  startTime: number | string = 0
  stopTime: number | string

  title: boolean
  warningTitle: boolean
  peertubeLink: boolean
  bigPlayBackgroundColor: string
  foregroundColor: string

  mode: PlayerMode
  scope = 'peertube'

  userTokens: Tokens
  headers = new Headers()
  LOCAL_STORAGE_OAUTH_CLIENT_KEYS = {
    CLIENT_ID: 'client_id',
    CLIENT_SECRET: 'client_secret'
  }

  private translationsPromise: Promise<{ [id: string]: string }>
  private configPromise: Promise<ServerConfig>
  private PeertubePlayerManagerModulePromise: Promise<any>

  private playlist: VideoPlaylist
  private playlistElements: VideoPlaylistElement[]
  private currentPlaylistElement: VideoPlaylistElement

  private wrapperElement: HTMLElement

  private peertubeHooks: Hooks = {}
  private loadedScripts = new Set<string>()

  static async main () {
    const videoContainerId = 'video-wrapper'
    const embed = new PeerTubeEmbed(videoContainerId)
    await embed.init()
  }

  constructor (private videoWrapperId: string) {
    this.wrapperElement = document.getElementById(this.videoWrapperId)
  }

  getVideoUrl (id: string) {
    return window.location.origin + '/api/v1/videos/' + id
  }

  refreshFetch (url: string, options?: RequestInit) {
    return fetch(url, options)
      .then((res: Response) => {
        if (res.status !== 401) return res

        const refreshingTokenPromise = new Promise((resolve, reject) => {
          const clientId: string = peertubeLocalStorage.getItem(this.LOCAL_STORAGE_OAUTH_CLIENT_KEYS.CLIENT_ID)
          const clientSecret: string = peertubeLocalStorage.getItem(this.LOCAL_STORAGE_OAUTH_CLIENT_KEYS.CLIENT_SECRET)

          const headers = new Headers()
          headers.set('Content-Type', 'application/x-www-form-urlencoded')

          const data = {
            refresh_token: this.userTokens.refreshToken,
            client_id: clientId,
            client_secret: clientSecret,
            response_type: 'code',
            grant_type: 'refresh_token'
          }

          fetch('/api/v1/users/token', {
            headers,
            method: 'POST',
            body: objectToUrlEncoded(data)
          }).then(res => {
            if (res.status === 401) return undefined

            return res.json()
          }).then((obj: UserRefreshToken & { code: 'invalid_grant'}) => {
            if (!obj || obj.code === 'invalid_grant') {
              Tokens.flush()
              this.removeTokensFromHeaders()

              return resolve()
            }

            this.userTokens.accessToken = obj.access_token
            this.userTokens.refreshToken = obj.refresh_token
            this.userTokens.save()

            this.setHeadersFromTokens()

            resolve()
          })
            .catch((refreshTokenError: any) => {
              reject(refreshTokenError)
            })
        })

        return refreshingTokenPromise
          .catch(() => {
            Tokens.flush()

            this.removeTokensFromHeaders()
          }).then(() => fetch(url, {
            ...options,
            headers: this.headers
          }))
      })
  }

  getPlaylistUrl (id: string) {
    return window.location.origin + '/api/v1/video-playlists/' + id
  }

  loadVideoInfo (videoId: string): Promise<Response> {
    return this.refreshFetch(this.getVideoUrl(videoId), { headers: this.headers })
  }

  loadVideoCaptions (videoId: string): Promise<Response> {
    return this.refreshFetch(this.getVideoUrl(videoId) + '/captions', { headers: this.headers })
  }

  loadPlaylistInfo (playlistId: string): Promise<Response> {
    return this.refreshFetch(this.getPlaylistUrl(playlistId), { headers: this.headers })
  }

  loadPlaylistElements (playlistId: string, start = 0): Promise<Response> {
    const url = new URL(this.getPlaylistUrl(playlistId) + '/videos')
    url.search = new URLSearchParams({ start: '' + start, count: '100' }).toString()

    return this.refreshFetch(url.toString(), { headers: this.headers })
  }

  loadConfig (): Promise<ServerConfig> {
    return this.refreshFetch('/api/v1/config')
      .then(res => res.json())
  }

  removeElement (element: HTMLElement) {
    element.parentElement.removeChild(element)
  }

  displayError (text: string, translations?: Translations) {
    // Remove video element
    if (this.playerElement) {
      this.removeElement(this.playerElement)
      this.playerElement = undefined
    }

    const translatedText = peertubeTranslate(text, translations)
    const translatedSorry = peertubeTranslate('Sorry', translations)

    document.title = translatedSorry + ' - ' + translatedText

    const errorBlock = document.getElementById('error-block')
    errorBlock.style.display = 'flex'

    const errorTitle = document.getElementById('error-title')
    errorTitle.innerHTML = peertubeTranslate('Sorry', translations)

    const errorText = document.getElementById('error-content')
    errorText.innerHTML = translatedText

    this.wrapperElement.style.display = 'none'
  }

  videoNotFound (translations?: Translations) {
    const text = 'This video does not exist.'
    this.displayError(text, translations)
  }

  videoFetchError (translations?: Translations) {
    const text = 'We cannot fetch the video. Please try again later.'
    this.displayError(text, translations)
  }

  playlistNotFound (translations?: Translations) {
    const text = 'This playlist does not exist.'
    this.displayError(text, translations)
  }

  playlistFetchError (translations?: Translations) {
    const text = 'We cannot fetch the playlist. Please try again later.'
    this.displayError(text, translations)
  }

  getParamToggle (params: URLSearchParams, name: string, defaultValue?: boolean) {
    return params.has(name) ? (params.get(name) === '1' || params.get(name) === 'true') : defaultValue
  }

  getParamString (params: URLSearchParams, name: string, defaultValue?: string) {
    return params.has(name) ? params.get(name) : defaultValue
  }

  async playNextVideo () {
    const next = this.getNextPlaylistElement()
    if (!next) {
      console.log('Next element not found in playlist.')
      return
    }

    this.currentPlaylistElement = next

    return this.loadVideoAndBuildPlayer(this.currentPlaylistElement.video.uuid)
  }

  async playPreviousVideo () {
    const previous = this.getPreviousPlaylistElement()
    if (!previous) {
      console.log('Previous element not found in playlist.')
      return
    }

    this.currentPlaylistElement = previous

    await this.loadVideoAndBuildPlayer(this.currentPlaylistElement.video.uuid)
  }

  getCurrentPosition () {
    if (!this.currentPlaylistElement) return -1

    return this.currentPlaylistElement.position
  }

  async init () {
    try {
      this.userTokens = Tokens.load()
      await this.initCore()
    } catch (e) {
      console.error(e)
    }
  }

  private initializeApi () {
    if (!this.enableApi) return

    this.api = new PeerTubeEmbedApi(this)
    this.api.initialize()
  }

  private loadParams (video: VideoDetails) {
    try {
      const params = new URL(window.location.toString()).searchParams

      this.autoplay = this.getParamToggle(params, 'autoplay', false)
      this.controls = this.getParamToggle(params, 'controls', true)
      this.muted = this.getParamToggle(params, 'muted', undefined)
      this.loop = this.getParamToggle(params, 'loop', false)
      this.title = this.getParamToggle(params, 'title', true)
      this.enableApi = this.getParamToggle(params, 'api', this.enableApi)
      this.warningTitle = this.getParamToggle(params, 'warningTitle', true)
      this.peertubeLink = this.getParamToggle(params, 'peertubeLink', true)

      this.scope = this.getParamString(params, 'scope', this.scope)
      this.subtitle = this.getParamString(params, 'subtitle')
      this.startTime = this.getParamString(params, 'start')
      this.stopTime = this.getParamString(params, 'stop')

      this.bigPlayBackgroundColor = this.getParamString(params, 'bigPlayBackgroundColor')
      this.foregroundColor = this.getParamString(params, 'foregroundColor')

      const modeParam = this.getParamString(params, 'mode')

      if (modeParam) {
        if (modeParam === 'p2p-media-loader') this.mode = 'p2p-media-loader'
        else this.mode = 'webtorrent'
      } else {
        if (Array.isArray(video.streamingPlaylists) && video.streamingPlaylists.length !== 0) this.mode = 'p2p-media-loader'
        else this.mode = 'webtorrent'
      }
    } catch (err) {
      console.error('Cannot get params from URL.', err)
    }
  }

  private async loadAllPlaylistVideos (playlistId: string, baseResult: ResultList<VideoPlaylistElement>) {
    let elements = baseResult.data
    let total = baseResult.total
    let i = 0

    while (total > elements.length && i < 10) {
      const result = await this.loadPlaylistElements(playlistId, elements.length)

      const json = await result.json() as ResultList<VideoPlaylistElement>
      total = json.total

      elements = elements.concat(json.data)
      i++
    }

    if (i === 10) {
      console.error('Cannot fetch all playlists elements, there are too many!')
    }

    return elements
  }

  private async loadPlaylist (playlistId: string) {
    const playlistPromise = this.loadPlaylistInfo(playlistId)
    const playlistElementsPromise = this.loadPlaylistElements(playlistId)

    let playlistResponse: Response
    let isResponseOk: boolean

    try {
      playlistResponse = await playlistPromise
      isResponseOk = true
    } catch (err) {
      console.error(err)
      isResponseOk = false
    }

    if (!isResponseOk) {
      const serverTranslations = await this.translationsPromise

      if (playlistResponse?.status === 404) {
        this.playlistNotFound(serverTranslations)
        return undefined
      }

      this.playlistFetchError(serverTranslations)
      return undefined
    }

    return { playlistResponse, videosResponse: await playlistElementsPromise }
  }

  private async loadVideo (videoId: string) {
    const videoPromise = this.loadVideoInfo(videoId)

    let videoResponse: Response
    let isResponseOk: boolean

    try {
      videoResponse = await videoPromise
      isResponseOk = true
    } catch (err) {
      console.error(err)

      isResponseOk = false
    }

    if (!isResponseOk) {
      const serverTranslations = await this.translationsPromise

      if (videoResponse?.status === 404) {
        this.videoNotFound(serverTranslations)
        return undefined
      }

      this.videoFetchError(serverTranslations)
      return undefined
    }

    const captionsPromise = this.loadVideoCaptions(videoId)

    return { captionsPromise, videoResponse }
  }

  private async buildPlaylistManager () {
    const translations = await this.translationsPromise

    this.player.upnext({
      timeout: 10000, // 10s
      headText: peertubeTranslate('Up Next', translations),
      cancelText: peertubeTranslate('Cancel', translations),
      suspendedText: peertubeTranslate('Autoplay is suspended', translations),
      getTitle: () => this.nextVideoTitle(),
      next: () => this.playNextVideo(),
      condition: () => !!this.getNextPlaylistElement(),
      suspended: () => false
    })
  }

  private async loadVideoAndBuildPlayer (uuid: string) {
    const res = await this.loadVideo(uuid)
    if (res === undefined) return

    return this.buildVideoPlayer(res.videoResponse, res.captionsPromise)
  }

  private nextVideoTitle () {
    const next = this.getNextPlaylistElement()
    if (!next) return ''

    return next.video.name
  }

  private getNextPlaylistElement (position?: number): VideoPlaylistElement {
    if (!position) position = this.currentPlaylistElement.position + 1

    if (position > this.playlist.videosLength) {
      return undefined
    }

    const next = this.playlistElements.find(e => e.position === position)

    if (!next || !next.video) {
      return this.getNextPlaylistElement(position + 1)
    }

    return next
  }

  private getPreviousPlaylistElement (position?: number): VideoPlaylistElement {
    if (!position) position = this.currentPlaylistElement.position - 1

    if (position < 1) {
      return undefined
    }

    const prev = this.playlistElements.find(e => e.position === position)

    if (!prev || !prev.video) {
      return this.getNextPlaylistElement(position - 1)
    }

    return prev
  }

  private async buildVideoPlayer (videoResponse: Response, captionsPromise: Promise<Response>) {
    let alreadyHadPlayer = false

    if (this.player) {
      this.player.dispose()
      alreadyHadPlayer = true
    }

    this.playerElement = document.createElement('video')
    this.playerElement.className = 'video-js vjs-peertube-skin'
    this.playerElement.setAttribute('playsinline', 'true')
    this.wrapperElement.appendChild(this.playerElement)

    const videoInfoPromise = videoResponse.json()
      .then((videoInfo: VideoDetails) => {
        if (!alreadyHadPlayer) this.loadPlaceholder(videoInfo)

        return videoInfo
      })

    const [ videoInfoTmp, serverTranslations, captionsResponse, config, PeertubePlayerManagerModule ] = await Promise.all([
      videoInfoPromise,
      this.translationsPromise,
      captionsPromise,
      this.configPromise,
      this.PeertubePlayerManagerModulePromise
    ])

    await this.ensurePluginsAreLoaded(config, serverTranslations)

    const videoInfo: VideoDetails = videoInfoTmp

    const PeertubePlayerManager = PeertubePlayerManagerModule.PeertubePlayerManager
    const videoCaptions = await this.buildCaptions(serverTranslations, captionsResponse)

    this.loadParams(videoInfo)

    const playlistPlugin = this.currentPlaylistElement
      ? {
        elements: this.playlistElements,
        playlist: this.playlist,

        getCurrentPosition: () => this.currentPlaylistElement.position,

        onItemClicked: (videoPlaylistElement: VideoPlaylistElement) => {
          this.currentPlaylistElement = videoPlaylistElement

          this.loadVideoAndBuildPlayer(this.currentPlaylistElement.video.uuid)
            .catch(err => console.error(err))
        }
      }
      : undefined

    const options: PeertubePlayerManagerOptions = {
      common: {
        // Autoplay in playlist mode
        autoplay: alreadyHadPlayer ? true : this.autoplay,
        controls: this.controls,
        muted: this.muted,
        loop: this.loop,

        captions: videoCaptions.length !== 0,
        subtitle: this.subtitle,

        startTime: this.playlist ? this.currentPlaylistElement.startTimestamp : this.startTime,
        stopTime: this.playlist ? this.currentPlaylistElement.stopTimestamp : this.stopTime,

        nextVideo: this.playlist ? () => this.playNextVideo() : undefined,
        hasNextVideo: this.playlist ? () => !!this.getNextPlaylistElement() : undefined,

        previousVideo: this.playlist ? () => this.playPreviousVideo() : undefined,
        hasPreviousVideo: this.playlist ? () => !!this.getPreviousPlaylistElement() : undefined,

        playlist: playlistPlugin,

        videoCaptions,
        inactivityTimeout: 2500,
        videoViewUrl: this.getVideoUrl(videoInfo.uuid) + '/views',

        playerElement: this.playerElement,
        onPlayerElementChange: (element: HTMLVideoElement) => this.playerElement = element,

        videoDuration: videoInfo.duration,
        enableHotkeys: true,
        peertubeLink: this.peertubeLink,
        poster: window.location.origin + videoInfo.previewPath,
        theaterButton: false,

        serverUrl: window.location.origin,
        language: navigator.language,
        embedUrl: window.location.origin + videoInfo.embedPath
      },

      webtorrent: {
        videoFiles: videoInfo.files
      }
    }

    if (this.mode === 'p2p-media-loader') {
      const hlsPlaylist = videoInfo.streamingPlaylists.find(p => p.type === VideoStreamingPlaylistType.HLS)

      Object.assign(options, {
        p2pMediaLoader: {
          playlistUrl: hlsPlaylist.playlistUrl,
          segmentsSha256Url: hlsPlaylist.segmentsSha256Url,
          redundancyBaseUrls: hlsPlaylist.redundancies.map(r => r.baseUrl),
          trackerAnnounce: videoInfo.trackerUrls,
          videoFiles: hlsPlaylist.files
        } as P2PMediaLoaderOptions
      })
    }

    this.player = await PeertubePlayerManager.initialize(this.mode, options, (player: videojs.Player) => this.player = player)
    this.player.on('customError', (event: any, data: any) => this.handleError(data.err, serverTranslations))

    window[ 'videojsPlayer' ] = this.player

    this.buildCSS()

    await this.buildDock(videoInfo, config)

    this.initializeApi()

    this.removePlaceholder()

    if (this.isPlaylistEmbed()) {
      await this.buildPlaylistManager()

      this.player.playlist().updateSelected()

      this.player.on('stopped', () => {
        this.playNextVideo()
      })
    }

    this.runHook('action:embed.player.loaded', undefined, { player: this.player, videojs })
  }

  private async initCore () {
    if (this.userTokens) this.setHeadersFromTokens()

    this.configPromise = this.loadConfig()
    this.translationsPromise = TranslationsManager.getServerTranslations(window.location.origin, navigator.language)
    this.PeertubePlayerManagerModulePromise = import('../../assets/player/peertube-player-manager')

    let videoId: string

    if (this.isPlaylistEmbed()) {
      const playlistId = this.getResourceId()
      const res = await this.loadPlaylist(playlistId)
      if (!res) return undefined

      this.playlist = await res.playlistResponse.json()

      const playlistElementResult = await res.videosResponse.json()
      this.playlistElements = await this.loadAllPlaylistVideos(playlistId, playlistElementResult)

      const params = new URL(window.location.toString()).searchParams
      const playlistPositionParam = this.getParamString(params, 'playlistPosition')

      let position = 1

      if (playlistPositionParam) {
        position = parseInt(playlistPositionParam + '', 10)
      }

      this.currentPlaylistElement = this.playlistElements.find(e => e.position === position)
      if (!this.currentPlaylistElement || !this.currentPlaylistElement.video) {
        console.error('Current playlist element is not valid.', this.currentPlaylistElement)
        this.currentPlaylistElement = this.getNextPlaylistElement()
      }

      if (!this.currentPlaylistElement) {
        console.error('This playlist does not have any valid element.')
        const serverTranslations = await this.translationsPromise
        this.playlistFetchError(serverTranslations)
        return
      }

      videoId = this.currentPlaylistElement.video.uuid
    } else {
      videoId = this.getResourceId()
    }

    return this.loadVideoAndBuildPlayer(videoId)
  }

  private handleError (err: Error, translations?: { [ id: string ]: string }) {
    if (err.message.indexOf('from xs param') !== -1) {
      this.player.dispose()
      this.playerElement = null
      this.displayError('This video is not available because the remote instance is not responding.', translations)
      return
    }
  }

  private async buildDock (videoInfo: VideoDetails, config: ServerConfig) {
    if (!this.controls) return

    // On webtorrent fallback, player may have been disposed
    if (!this.player.player_) return

    const title = this.title ? videoInfo.name : undefined

    const description = config.tracker.enabled && this.warningTitle
      ? '<span class="text">' + peertubeTranslate('Watching this video may reveal your IP address to others.') + '</span>'
      : undefined

    this.player.dock({
      title,
      description
    })
  }

  private buildCSS () {
    const body = document.getElementById('custom-css')

    if (this.bigPlayBackgroundColor) {
      body.style.setProperty('--embedBigPlayBackgroundColor', this.bigPlayBackgroundColor)
    }

    if (this.foregroundColor) {
      body.style.setProperty('--embedForegroundColor', this.foregroundColor)
    }
  }

  private async buildCaptions (serverTranslations: any, captionsResponse: Response): Promise<VideoJSCaption[]> {
    if (captionsResponse.ok) {
      const { data } = (await captionsResponse.json()) as ResultList<VideoCaption>

      return data.map(c => ({
        label: peertubeTranslate(c.language.label, serverTranslations),
        language: c.language.id,
        src: window.location.origin + c.captionPath
      }))
    }

    return []
  }

  private loadPlaceholder (video: VideoDetails) {
    const placeholder = this.getPlaceholderElement()

    const url = window.location.origin + video.previewPath
    placeholder.style.backgroundImage = `url("${url}")`
    placeholder.style.display = 'block'
  }

  private removePlaceholder () {
    const placeholder = this.getPlaceholderElement()
    placeholder.style.display = 'none'
  }

  private getPlaceholderElement () {
    return document.getElementById('placeholder-preview')
  }

  private setHeadersFromTokens () {
    this.headers.set('Authorization', `${this.userTokens.tokenType} ${this.userTokens.accessToken}`)
  }

  private removeTokensFromHeaders () {
    this.headers.delete('Authorization')
  }

  private getResourceId () {
    const urlParts = window.location.pathname.split('/')
    return urlParts[ urlParts.length - 1 ]
  }

  private isPlaylistEmbed () {
    return window.location.pathname.split('/')[1] === 'video-playlists'
  }

  private async ensurePluginsAreLoaded (config: ServerConfig, translations?: { [ id: string ]: string }) {
    if (config.plugin.registered.length === 0) return

    for (const plugin of config.plugin.registered) {
      for (const key of Object.keys(plugin.clientScripts)) {
        const clientScript = plugin.clientScripts[key]

        if (clientScript.scopes.includes('embed') === false) continue

        const script = `/plugins/${plugin.name}/${plugin.version}/client-scripts/${clientScript.script}`

        if (this.loadedScripts.has(script)) continue

        const pluginInfo = {
          plugin,
          clientScript: {
            script,
            scopes: clientScript.scopes
          },
          pluginType: PluginType.PLUGIN,
          isTheme: false
        }

        await loadPlugin({
          hooks: this.peertubeHooks,
          pluginInfo,
          peertubeHelpersFactory: _ => this.buildPeerTubeHelpers(translations)
        })
      }
    }
  }

  private buildPeerTubeHelpers (translations?: { [ id: string ]: string }): RegisterClientHelpers {
    function unimplemented (): any {
      throw new Error('This helper is not implemented in embed.')
    }

    return {
      getBaseStaticRoute: unimplemented,

      getSettings: unimplemented,

      isLoggedIn: unimplemented,

      notifier: {
        info: unimplemented,
        error: unimplemented,
        success: unimplemented
      },

      showModal: unimplemented,

      markdownRenderer: {
        textMarkdownToHTML: unimplemented,
        enhancedMarkdownToHTML: unimplemented
      },

      translate: (value: string) => {
        return Promise.resolve(peertubeTranslate(value, translations))
      }
    }
  }

  private runHook <T> (hookName: ClientHookName, result?: T, params?: any): Promise<T> {
    return runHook(this.peertubeHooks, hookName, result, params)
  }
}

PeerTubeEmbed.main()
  .catch(err => console.error('Cannot init embed.', err))