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