client/src/app/+videos/+video-watch/video-watch.component.ts

   1 import { Hotkey, HotkeysService } from 'angular2-hotkeys'
   2 import { forkJoin, map, Observable, of, Subscription, switchMap } from 'rxjs'
   3 import { VideoJsPlayer } from 'video.js'
   4 import { PlatformLocation } from '@angular/common'
   5 import { Component, ElementRef, Inject, LOCALE_ID, NgZone, OnDestroy, OnInit, ViewChild } from '@angular/core'
   6 import { ActivatedRoute, Router } from '@angular/router'
   7 import {
   8   AuthService,
   9   AuthUser,
  10   ConfirmService,
  11   MetaService,
  12   Notifier,
  13   PeerTubeSocket,
  14   PluginService,
  15   RestExtractor,
  16   ScreenService,
  17   ServerService,
  18   User,
  19   UserService
  20 } from '@app/core'
  21 import { HooksService } from '@app/core/plugins/hooks.service'
  22 import { isXPercentInViewport, scrollToTop } from '@app/helpers'
  23 import { Video, VideoCaptionService, VideoDetails, VideoService } from '@app/shared/shared-main'
  24 import { SubscribeButtonComponent } from '@app/shared/shared-user-subscription'
  25 import { LiveVideoService } from '@app/shared/shared-video-live'
  26 import { VideoPlaylist, VideoPlaylistService } from '@app/shared/shared-video-playlist'
  27 import { logger } from '@root-helpers/logger'
  28 import { isP2PEnabled } from '@root-helpers/video'
  29 import { timeToInt } from '@shared/core-utils'
  30 import {
  31   HTMLServerConfig,
  32   HttpStatusCode,
  33   LiveVideo,
  34   PeerTubeProblemDocument,
  35   ServerErrorCode,
  36   VideoCaption,
  37   VideoPrivacy,
  38   VideoState
  39 } from '@shared/models'
  40 import {
  41   CustomizationOptions,
  42   P2PMediaLoaderOptions,
  43   PeertubePlayerManager,
  44   PeertubePlayerManagerOptions,
  45   PlayerMode,
  46   videojs
  47 } from '../../../assets/player'
  48 import { cleanupVideoWatch, getStoredTheater, getStoredVideoWatchHistory } from '../../../assets/player/peertube-player-local-storage'
  49 import { environment } from '../../../environments/environment'
  50 import { VideoWatchPlaylistComponent } from './shared'
  51
  52 type URLOptions = CustomizationOptions & { playerMode: PlayerMode }
  53
  54 @Component({
  55   selector: 'my-video-watch',
  56   templateUrl: './video-watch.component.html',
  57   styleUrls: [ './video-watch.component.scss' ]
  58 })
  59 export class VideoWatchComponent implements OnInit, OnDestroy {
  60   @ViewChild('videoWatchPlaylist', { static: true }) videoWatchPlaylist: VideoWatchPlaylistComponent
  61   @ViewChild('subscribeButton') subscribeButton: SubscribeButtonComponent
  62
  63   player: VideoJsPlayer
  64   playerElement: HTMLVideoElement
  65   playerPlaceholderImgSrc: string
  66   theaterEnabled = false
  67
  68   video: VideoDetails = null
  69   videoCaptions: VideoCaption[] = []
  70   liveVideo: LiveVideo
  71
  72   playlistPosition: number
  73   playlist: VideoPlaylist = null
  74
  75   remoteServerDown = false
  76   noPlaylistVideoFound = false
  77
  78   private nextVideoUUID = ''
  79   private nextVideoTitle = ''
  80
  81   private currentTime: number
  82
  83   private paramsSub: Subscription
  84   private queryParamsSub: Subscription
  85   private configSub: Subscription
  86   private liveVideosSub: Subscription
  87
  88   private serverConfig: HTMLServerConfig
  89
  90   private hotkeys: Hotkey[] = []
  91
  92   constructor (
  93     private elementRef: ElementRef,
  94     private route: ActivatedRoute,
  95     private router: Router,
  96     private videoService: VideoService,
  97     private playlistService: VideoPlaylistService,
  98     private liveVideoService: LiveVideoService,
  99     private confirmService: ConfirmService,
 100     private metaService: MetaService,
 101     private authService: AuthService,
 102     private userService: UserService,
 103     private serverService: ServerService,
 104     private restExtractor: RestExtractor,
 105     private notifier: Notifier,
 106     private zone: NgZone,
 107     private videoCaptionService: VideoCaptionService,
 108     private hotkeysService: HotkeysService,
 109     private hooks: HooksService,
 110     private pluginService: PluginService,
 111     private peertubeSocket: PeerTubeSocket,
 112     private screenService: ScreenService,
 113     private location: PlatformLocation,
 114     @Inject(LOCALE_ID) private localeId: string
 115   ) { }
 116
 117   get user () {
 118     return this.authService.getUser()
 119   }
 120
 121   get anonymousUser () {
 122     return this.userService.getAnonymousUser()
 123   }
 124
 125   ngOnInit () {
 126     this.serverConfig = this.serverService.getHTMLConfig()
 127
 128     PeertubePlayerManager.initState()
 129
 130     this.loadRouteParams()
 131     this.loadRouteQuery()
 132
 133     this.initHotkeys()
 134
 135     this.theaterEnabled = getStoredTheater()
 136
 137     this.hooks.runAction('action:video-watch.init', 'video-watch')
 138
 139     setTimeout(cleanupVideoWatch, 1500) // Run in timeout to ensure we're not blocking the UI
 140   }
 141
 142   ngOnDestroy () {
 143     this.flushPlayer()
 144
 145     // Unsubscribe subscriptions
 146     if (this.paramsSub) this.paramsSub.unsubscribe()
 147     if (this.queryParamsSub) this.queryParamsSub.unsubscribe()
 148     if (this.configSub) this.configSub.unsubscribe()
 149     if (this.liveVideosSub) this.liveVideosSub.unsubscribe()
 150
 151     // Unbind hotkeys
 152     this.hotkeysService.remove(this.hotkeys)
 153   }
 154
 155   getCurrentTime () {
 156     return this.currentTime
 157   }
 158
 159   getCurrentPlaylistPosition () {
 160     return this.videoWatchPlaylist.currentPlaylistPosition
 161   }
 162
 163   onRecommendations (videos: Video[]) {
 164     if (videos.length === 0) return
 165
 166     // The recommended videos's first element should be the next video
 167     const video = videos[0]
 168     this.nextVideoUUID = video.uuid
 169     this.nextVideoTitle = video.name
 170   }
 171
 172   handleTimestampClicked (timestamp: number) {
 173     if (!this.player || this.video.isLive) return
 174
 175     this.player.currentTime(timestamp)
 176     scrollToTop()
 177   }
 178
 179   onPlaylistVideoFound (videoId: string) {
 180     this.loadVideo(videoId)
 181   }
 182
 183   onPlaylistNoVideoFound () {
 184     this.noPlaylistVideoFound = true
 185   }
 186
 187   isUserLoggedIn () {
 188     return this.authService.isLoggedIn()
 189   }
 190
 191   isVideoBlur (video: Video) {
 192     return video.isVideoNSFWForUser(this.user, this.serverConfig)
 193   }
 194
 195   isChannelDisplayNameGeneric () {
 196     const genericChannelDisplayName = [
 197       `Main ${this.video.channel.ownerAccount.name} channel`,
 198       `Default ${this.video.channel.ownerAccount.name} channel`
 199     ]
 200
 201     return genericChannelDisplayName.includes(this.video.channel.displayName)
 202   }
 203
 204   displayOtherVideosAsRow () {
 205     // Use the same value as in the SASS file
 206     return this.screenService.getWindowInnerWidth() <= 1100
 207   }
 208
 209   private loadRouteParams () {
 210     this.paramsSub = this.route.params.subscribe(routeParams => {
 211       const videoId = routeParams['videoId']
 212       if (videoId) return this.loadVideo(videoId)
 213
 214       const playlistId = routeParams['playlistId']
 215       if (playlistId) return this.loadPlaylist(playlistId)
 216     })
 217   }
 218
 219   private loadRouteQuery () {
 220     this.queryParamsSub = this.route.queryParams.subscribe(queryParams => {
 221       // Handle the ?playlistPosition
 222       const positionParam = queryParams['playlistPosition'] ?? 1
 223
 224       this.playlistPosition = positionParam === 'last'
 225         ? -1 // Handle the "last" index
 226         : parseInt(positionParam + '', 10)
 227
 228       if (isNaN(this.playlistPosition)) {
 229         logger.error(`playlistPosition query param '${positionParam}' was parsed as NaN, defaulting to 1.`)
 230         this.playlistPosition = 1
 231       }
 232
 233       this.videoWatchPlaylist.updatePlaylistIndex(this.playlistPosition)
 234
 235       const start = queryParams['start']
 236       if (this.player && start) this.player.currentTime(parseInt(start, 10))
 237     })
 238   }
 239
 240   private loadVideo (videoId: string) {
 241     if (this.isSameElement(this.video, videoId)) return
 242
 243     if (this.player) this.player.pause()
 244
 245     const videoObs = this.hooks.wrapObsFun(
 246       this.videoService.getVideo.bind(this.videoService),
 247       { videoId },
 248       'video-watch',
 249       'filter:api.video-watch.video.get.params',
 250       'filter:api.video-watch.video.get.result'
 251     )
 252
 253     const videoAndLiveObs: Observable<{ video: VideoDetails, live?: LiveVideo }> = videoObs.pipe(
 254       switchMap(video => {
 255         if (!video.isLive) return of({ video })
 256
 257         return this.liveVideoService.getVideoLive(video.uuid)
 258           .pipe(map(live => ({ live, video })))
 259       })
 260     )
 261
 262     forkJoin([
 263       videoAndLiveObs,
 264       this.videoCaptionService.listCaptions(videoId),
 265       this.userService.getAnonymousOrLoggedUser()
 266     ]).subscribe({
 267       next: ([ { video, live }, captionsResult, loggedInOrAnonymousUser ]) => {
 268         const queryParams = this.route.snapshot.queryParams
 269
 270         const urlOptions = {
 271           resume: queryParams.resume,
 272
 273           startTime: queryParams.start,
 274           stopTime: queryParams.stop,
 275
 276           muted: queryParams.muted,
 277           loop: queryParams.loop,
 278           subtitle: queryParams.subtitle,
 279
 280           playerMode: queryParams.mode,
 281           peertubeLink: false
 282         }
 283
 284         this.onVideoFetched({ video, live, videoCaptions: captionsResult.data, loggedInOrAnonymousUser, urlOptions })
 285             .catch(err => this.handleGlobalError(err))
 286       },
 287
 288       error: err => this.handleRequestError(err)
 289     })
 290   }
 291
 292   private loadPlaylist (playlistId: string) {
 293     if (this.isSameElement(this.playlist, playlistId)) return
 294
 295     this.noPlaylistVideoFound = false
 296
 297     this.playlistService.getVideoPlaylist(playlistId)
 298       .subscribe({
 299         next: playlist => {
 300           this.playlist = playlist
 301
 302           this.videoWatchPlaylist.loadPlaylistElements(playlist, !this.playlistPosition, this.playlistPosition)
 303         },
 304
 305         error: err => this.handleRequestError(err)
 306       })
 307   }
 308
 309   private isSameElement (element: VideoDetails | VideoPlaylist, newId: string) {
 310     if (!element) return false
 311
 312     return (element.id + '') === newId || element.uuid === newId || element.shortUUID === newId
 313   }
 314
 315   private async handleRequestError (err: any) {
 316     const errorBody = err.body as PeerTubeProblemDocument
 317
 318     if (errorBody?.code === ServerErrorCode.DOES_NOT_RESPECT_FOLLOW_CONSTRAINTS && errorBody.originUrl) {
 319       const originUrl = errorBody.originUrl + (window.location.search ?? '')
 320
 321       const res = await this.confirmService.confirm(
 322         // eslint-disable-next-line max-len
 323         $localize`This video is not available on this instance. Do you want to be redirected on the origin instance: <a href="${originUrl}">${originUrl}</a>?`,
 324         $localize`Redirection`
 325       )
 326
 327       if (res === true) return window.location.href = originUrl
 328     }
 329
 330     // If 400, 403 or 404, the video is private or blocked so redirect to 404
 331     return this.restExtractor.redirectTo404IfNotFound(err, 'video', [
 332       HttpStatusCode.BAD_REQUEST_400,
 333       HttpStatusCode.FORBIDDEN_403,
 334       HttpStatusCode.NOT_FOUND_404
 335     ])
 336   }
 337
 338   private handleGlobalError (err: any) {
 339     const errorMessage: string = typeof err === 'string' ? err : err.message
 340     if (!errorMessage) return
 341
 342     // Display a message in the video player instead of a notification
 343     if (errorMessage.includes('from xs param')) {
 344       this.flushPlayer()
 345       this.remoteServerDown = true
 346
 347       return
 348     }
 349
 350     this.notifier.error(errorMessage)
 351   }
 352
 353   private async onVideoFetched (options: {
 354     video: VideoDetails
 355     live: LiveVideo
 356     videoCaptions: VideoCaption[]
 357     urlOptions: URLOptions
 358     loggedInOrAnonymousUser: User
 359   }) {
 360     const { video, live, videoCaptions, urlOptions, loggedInOrAnonymousUser } = options
 361
 362     this.subscribeToLiveEventsIfNeeded(this.video, video)
 363
 364     this.video = video
 365     this.videoCaptions = videoCaptions
 366     this.liveVideo = live
 367
 368     // Re init attributes
 369     this.playerPlaceholderImgSrc = undefined
 370     this.remoteServerDown = false
 371     this.currentTime = undefined
 372
 373     if (this.isVideoBlur(this.video)) {
 374       const res = await this.confirmService.confirm(
 375         $localize`This video contains mature or explicit content. Are you sure you want to watch it?`,
 376         $localize`Mature or explicit content`
 377       )
 378       if (res === false) return this.location.back()
 379     }
 380
 381     this.buildPlayer(urlOptions, loggedInOrAnonymousUser)
 382       .catch(err => logger.error('Cannot build the player', err))
 383
 384     this.setOpenGraphTags()
 385
 386     const hookOptions = {
 387       videojs,
 388       video: this.video,
 389       playlist: this.playlist
 390     }
 391     this.hooks.runAction('action:video-watch.video.loaded', 'video-watch', hookOptions)
 392   }
 393
 394   private async buildPlayer (urlOptions: URLOptions, loggedInOrAnonymousUser: User) {
 395     // Flush old player if needed
 396     this.flushPlayer()
 397
 398     const videoState = this.video.state.id
 399     if (videoState === VideoState.LIVE_ENDED || videoState === VideoState.WAITING_FOR_LIVE) {
 400       this.playerPlaceholderImgSrc = this.video.previewPath
 401       return
 402     }
 403
 404     // Build video element, because videojs removes it on dispose
 405     const playerElementWrapper = this.elementRef.nativeElement.querySelector('#videojs-wrapper')
 406     this.playerElement = document.createElement('video')
 407     this.playerElement.className = 'video-js vjs-peertube-skin'
 408     this.playerElement.setAttribute('playsinline', 'true')
 409     playerElementWrapper.appendChild(this.playerElement)
 410
 411     const params = {
 412       video: this.video,
 413       videoCaptions: this.videoCaptions,
 414       liveVideo: this.liveVideo,
 415       urlOptions,
 416       loggedInOrAnonymousUser,
 417       user: this.user
 418     }
 419     const { playerMode, playerOptions } = await this.hooks.wrapFun(
 420       this.buildPlayerManagerOptions.bind(this),
 421       params,
 422       'video-watch',
 423       'filter:internal.video-watch.player.build-options.params',
 424       'filter:internal.video-watch.player.build-options.result'
 425     )
 426
 427     this.zone.runOutsideAngular(async () => {
 428       this.player = await PeertubePlayerManager.initialize(playerMode, playerOptions, player => this.player = player)
 429
 430       this.player.on('customError', (_e, data: any) => {
 431         this.zone.run(() => this.handleGlobalError(data.err))
 432       })
 433
 434       this.player.on('timeupdate', () => {
 435         // Don't need to trigger angular change for this variable, that is sent to children components on click
 436         this.currentTime = Math.floor(this.player.currentTime())
 437       })
 438
 439       /**
 440        * condition: true to make the upnext functionality trigger, false to disable the upnext functionality
 441        *            go to the next video in 'condition()' if you don't want of the timer.
 442        * next: function triggered at the end of the timer.
 443        * suspended: function used at each click of the timer checking if we need to reset progress
 444        *            and wait until suspended becomes truthy again.
 445        */
 446       this.player.upnext({
 447         timeout: 5000, // 5s
 448
 449         headText: $localize`Up Next`,
 450         cancelText: $localize`Cancel`,
 451         suspendedText: $localize`Autoplay is suspended`,
 452
 453         getTitle: () => this.nextVideoTitle,
 454
 455         next: () => this.zone.run(() => this.playNextVideoInAngularZone()),
 456         condition: () => {
 457           if (!this.playlist) return this.isAutoPlayNext()
 458
 459           // Don't wait timeout to play the next playlist video
 460           if (this.isPlaylistAutoPlayNext()) {
 461             this.playNextVideoInAngularZone()
 462             return undefined
 463           }
 464
 465           return false
 466         },
 467
 468         suspended: () => {
 469           return (
 470             !isXPercentInViewport(this.player.el() as HTMLElement, 80) ||
 471             !document.getElementById('content').contains(document.activeElement)
 472           )
 473         }
 474       })
 475
 476       this.player.one('stopped', () => {
 477         if (this.playlist && this.isPlaylistAutoPlayNext()) {
 478           this.playNextVideoInAngularZone()
 479         }
 480       })
 481
 482       this.player.one('ended', () => {
 483         if (this.video.isLive) {
 484           this.zone.run(() => this.video.state.id = VideoState.LIVE_ENDED)
 485         }
 486       })
 487
 488       this.player.on('theaterChange', (_: any, enabled: boolean) => {
 489         this.zone.run(() => this.theaterEnabled = enabled)
 490       })
 491
 492       this.hooks.runAction('action:video-watch.player.loaded', 'video-watch', {
 493         player: this.player,
 494         playlist: this.playlist,
 495         playlistPosition: this.playlistPosition,
 496         videojs,
 497         video: this.video
 498       })
 499     })
 500   }
 501
 502   private hasNextVideo () {
 503     if (this.playlist) {
 504       return this.videoWatchPlaylist.hasNextVideo()
 505     }
 506
 507     return true
 508   }
 509
 510   private playNextVideoInAngularZone () {
 511     if (this.playlist) {
 512       this.zone.run(() => this.videoWatchPlaylist.navigateToNextPlaylistVideo())
 513       return
 514     }
 515
 516     if (this.nextVideoUUID) {
 517       this.router.navigate([ '/w', this.nextVideoUUID ])
 518     }
 519   }
 520
 521   private isAutoplay () {
 522     // We'll jump to the thread id, so do not play the video
 523     if (this.route.snapshot.params['threadId']) return false
 524
 525     // Otherwise true by default
 526     if (!this.user) return true
 527
 528     // Be sure the autoPlay is set to false
 529     return this.user.autoPlayVideo !== false
 530   }
 531
 532   private isAutoPlayNext () {
 533     return (
 534       (this.user?.autoPlayNextVideo) ||
 535       this.anonymousUser.autoPlayNextVideo
 536     )
 537   }
 538
 539   private isPlaylistAutoPlayNext () {
 540     return (
 541       (this.user?.autoPlayNextVideoPlaylist) ||
 542       this.anonymousUser.autoPlayNextVideoPlaylist
 543     )
 544   }
 545
 546   private flushPlayer () {
 547     // Remove player if it exists
 548     if (!this.player) return
 549
 550     try {
 551       this.player.dispose()
 552       this.player = undefined
 553     } catch (err) {
 554       logger.error('Cannot dispose player.', err)
 555     }
 556   }
 557
 558   private buildPlayerManagerOptions (params: {
 559     video: VideoDetails
 560     liveVideo: LiveVideo
 561     videoCaptions: VideoCaption[]
 562     urlOptions: CustomizationOptions & { playerMode: PlayerMode }
 563     loggedInOrAnonymousUser: User
 564     user?: AuthUser // Keep for plugins
 565   }) {
 566     const { video, liveVideo, videoCaptions, urlOptions, loggedInOrAnonymousUser } = params
 567
 568     const getStartTime = () => {
 569       const byUrl = urlOptions.startTime !== undefined
 570       const byHistory = video.userHistory && (!this.playlist || urlOptions.resume !== undefined)
 571       const byLocalStorage = getStoredVideoWatchHistory(video.uuid)
 572
 573       if (byUrl) return timeToInt(urlOptions.startTime)
 574       if (byHistory) return video.userHistory.currentTime
 575       if (byLocalStorage) return byLocalStorage.duration
 576
 577       return 0
 578     }
 579
 580     let startTime = getStartTime()
 581
 582     // If we are at the end of the video, reset the timer
 583     if (video.duration - startTime <= 1) startTime = 0
 584
 585     const playerCaptions = videoCaptions.map(c => ({
 586       label: c.language.label,
 587       language: c.language.id,
 588       src: environment.apiUrl + c.captionPath
 589     }))
 590
 591     const liveOptions = video.isLive
 592       ? { latencyMode: liveVideo.latencyMode }
 593       : undefined
 594
 595     const options: PeertubePlayerManagerOptions = {
 596       common: {
 597         autoplay: this.isAutoplay(),
 598         p2pEnabled: isP2PEnabled(video, this.serverConfig, loggedInOrAnonymousUser.p2pEnabled),
 599
 600         hasNextVideo: () => this.hasNextVideo(),
 601         nextVideo: () => this.playNextVideoInAngularZone(),
 602
 603         playerElement: this.playerElement,
 604         onPlayerElementChange: (element: HTMLVideoElement) => this.playerElement = element,
 605
 606         videoDuration: video.duration,
 607         enableHotkeys: true,
 608         inactivityTimeout: 2500,
 609         poster: video.previewUrl,
 610
 611         startTime,
 612         stopTime: urlOptions.stopTime,
 613         controlBar: urlOptions.controlBar,
 614         controls: urlOptions.controls,
 615         muted: urlOptions.muted,
 616         loop: urlOptions.loop,
 617         subtitle: urlOptions.subtitle,
 618
 619         peertubeLink: urlOptions.peertubeLink,
 620
 621         theaterButton: true,
 622         captions: videoCaptions.length !== 0,
 623
 624         videoViewUrl: video.privacy.id !== VideoPrivacy.PRIVATE
 625           ? this.videoService.getVideoViewUrl(video.uuid)
 626           : null,
 627         authorizationHeader: this.authService.getRequestHeaderValue(),
 628
 629         embedUrl: video.embedUrl,
 630         embedTitle: video.name,
 631         instanceName: this.serverConfig.instance.name,
 632
 633         isLive: video.isLive,
 634         liveOptions,
 635
 636         language: this.localeId,
 637
 638         serverUrl: environment.apiUrl,
 639
 640         videoCaptions: playerCaptions,
 641
 642         videoShortUUID: video.shortUUID,
 643         videoUUID: video.uuid,
 644
 645         errorNotifier: (message: string) => this.notifier.error(message)
 646       },
 647
 648       webtorrent: {
 649         videoFiles: video.files
 650       },
 651
 652       pluginsManager: this.pluginService.getPluginsManager()
 653     }
 654
 655     // Only set this if we're in a playlist
 656     if (this.playlist) {
 657       options.common.hasPreviousVideo = () => this.videoWatchPlaylist.hasPreviousVideo()
 658
 659       options.common.previousVideo = () => {
 660         this.zone.run(() => this.videoWatchPlaylist.navigateToPreviousPlaylistVideo())
 661       }
 662     }
 663
 664     let mode: PlayerMode
 665
 666     if (urlOptions.playerMode) {
 667       if (urlOptions.playerMode === 'p2p-media-loader') mode = 'p2p-media-loader'
 668       else mode = 'webtorrent'
 669     } else {
 670       if (video.hasHlsPlaylist()) mode = 'p2p-media-loader'
 671       else mode = 'webtorrent'
 672     }
 673
 674     // p2p-media-loader needs TextEncoder, fallback on WebTorrent if not available
 675     if (typeof TextEncoder === 'undefined') {
 676       mode = 'webtorrent'
 677     }
 678
 679     if (mode === 'p2p-media-loader') {
 680       const hlsPlaylist = video.getHlsPlaylist()
 681
 682       const p2pMediaLoader = {
 683         playlistUrl: hlsPlaylist.playlistUrl,
 684         segmentsSha256Url: hlsPlaylist.segmentsSha256Url,
 685         redundancyBaseUrls: hlsPlaylist.redundancies.map(r => r.baseUrl),
 686         trackerAnnounce: video.trackerUrls,
 687         videoFiles: hlsPlaylist.files
 688       } as P2PMediaLoaderOptions
 689
 690       Object.assign(options, { p2pMediaLoader })
 691     }
 692
 693     return { playerMode: mode, playerOptions: options }
 694   }
 695
 696   private async subscribeToLiveEventsIfNeeded (oldVideo: VideoDetails, newVideo: VideoDetails) {
 697     if (!this.liveVideosSub) {
 698       this.liveVideosSub = this.buildLiveEventsSubscription()
 699     }
 700
 701     if (oldVideo && oldVideo.id !== newVideo.id) {
 702       this.peertubeSocket.unsubscribeLiveVideos(oldVideo.id)
 703     }
 704
 705     if (!newVideo.isLive) return
 706
 707     await this.peertubeSocket.subscribeToLiveVideosSocket(newVideo.id)
 708   }
 709
 710   private buildLiveEventsSubscription () {
 711     return this.peertubeSocket.getLiveVideosObservable()
 712       .subscribe(({ type, payload }) => {
 713         if (type === 'state-change') return this.handleLiveStateChange(payload.state)
 714         if (type === 'views-change') return this.handleLiveViewsChange(payload.viewers)
 715       })
 716   }
 717
 718   private handleLiveStateChange (newState: VideoState) {
 719     if (newState !== VideoState.PUBLISHED) return
 720
 721     logger.info('Loading video after live update.')
 722
 723     const videoUUID = this.video.uuid
 724
 725     // Reset to force refresh the video
 726     this.video = undefined
 727     this.loadVideo(videoUUID)
 728   }
 729
 730   private handleLiveViewsChange (newViewers: number) {
 731     if (!this.video) {
 732       logger.error('Cannot update video live views because video is no defined.')
 733       return
 734     }
 735
 736     logger.info('Updating live views.')
 737
 738     this.video.viewers = newViewers
 739   }
 740
 741   private initHotkeys () {
 742     this.hotkeys = [
 743       // These hotkeys are managed by the player
 744       new Hotkey('f', e => e, undefined, $localize`Enter/exit fullscreen`),
 745       new Hotkey('space', e => e, undefined, $localize`Play/Pause the video`),
 746       new Hotkey('m', e => e, undefined, $localize`Mute/unmute the video`),
 747
 748       new Hotkey('0-9', e => e, undefined, $localize`Skip to a percentage of the video: 0 is 0% and 9 is 90%`),
 749
 750       new Hotkey('up', e => e, undefined, $localize`Increase the volume`),
 751       new Hotkey('down', e => e, undefined, $localize`Decrease the volume`),
 752
 753       new Hotkey('right', e => e, undefined, $localize`Seek the video forward`),
 754       new Hotkey('left', e => e, undefined, $localize`Seek the video backward`),
 755
 756       new Hotkey('>', e => e, undefined, $localize`Increase playback rate`),
 757       new Hotkey('<', e => e, undefined, $localize`Decrease playback rate`),
 758
 759       new Hotkey(',', e => e, undefined, $localize`Navigate in the video to the previous frame`),
 760       new Hotkey('.', e => e, undefined, $localize`Navigate in the video to the next frame`),
 761
 762       new Hotkey('t', e => {
 763         this.theaterEnabled = !this.theaterEnabled
 764         return false
 765       }, undefined, $localize`Toggle theater mode`)
 766     ]
 767
 768     if (this.isUserLoggedIn()) {
 769       this.hotkeys = this.hotkeys.concat([
 770         new Hotkey('shift+s', () => {
 771           if (this.subscribeButton.isSubscribedToAll()) this.subscribeButton.unsubscribe()
 772           else this.subscribeButton.subscribe()
 773
 774           return false
 775         }, undefined, $localize`Subscribe to the account`)
 776       ])
 777     }
 778
 779     this.hotkeysService.add(this.hotkeys)
 780   }
 781
 782   private setOpenGraphTags () {
 783     this.metaService.setTitle(this.video.name)
 784
 785     this.metaService.setTag('og:type', 'video')
 786
 787     this.metaService.setTag('og:title', this.video.name)
 788     this.metaService.setTag('name', this.video.name)
 789
 790     this.metaService.setTag('og:description', this.video.description)
 791     this.metaService.setTag('description', this.video.description)
 792
 793     this.metaService.setTag('og:image', this.video.previewPath)
 794
 795     this.metaService.setTag('og:duration', this.video.duration.toString())
 796
 797     this.metaService.setTag('og:site_name', 'PeerTube')
 798
 799     this.metaService.setTag('og:url', window.location.href)
 800     this.metaService.setTag('url', window.location.href)
 801   }
 802 }