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