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