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

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