1 files changed, 219 insertions, 0 deletions

diff --git a/client/src/assets/player/peertube-plugin.ts b/client/src/assets/player/peertube-plugin.ts
new file mode 100644
index 000000000..0bd607697
--- /dev/null
+++ b/client/src/assets/player/peertube-plugin.ts
@@ -0,0 +1,219 @@
+// FIXME: something weird with our path definition in tsconfig and typings
+// @ts-ignore
+import * as videojs from 'video.js'
+import './videojs-components/settings-menu-button'
+import { PeerTubePluginOptions, UserWatching, VideoJSCaption, VideoJSComponentInterface, videojsUntyped } from './peertube-videojs-typings'
+import { isMobile, timeToInt } from './utils'
+import {
+  getStoredLastSubtitle,
+  getStoredMute,
+  getStoredVolume,
+  saveLastSubtitle,
+  saveMuteInStore,
+  saveVolumeInStore
+} from './peertube-player-local-storage'
+
+const Plugin: VideoJSComponentInterface = videojs.getPlugin('plugin')
+class PeerTubePlugin extends Plugin {
+  private readonly autoplay: boolean = false
+  private readonly startTime: number = 0
+  private readonly videoViewUrl: string
+  private readonly videoDuration: number
+  private readonly CONSTANTS = {
+    USER_WATCHING_VIDEO_INTERVAL: 5000 // Every 5 seconds, notify the user is watching the video
+  }
+
+  private player: any
+  private videoCaptions: VideoJSCaption[]
+  private defaultSubtitle: string
+
+  private videoViewInterval: any
+  private userWatchingVideoInterval: any
+  private qualityObservationTimer: any
+
+  constructor (player: videojs.Player, options: PeerTubePluginOptions) {
+    super(player, options)
+
+    this.startTime = timeToInt(options.startTime)
+    this.videoViewUrl = options.videoViewUrl
+    this.videoDuration = options.videoDuration
+    this.videoCaptions = options.videoCaptions
+
+    if (this.autoplay === true) this.player.addClass('vjs-has-autoplay')
+
+    this.player.ready(() => {
+      const playerOptions = this.player.options_
+
+      const volume = getStoredVolume()
+      if (volume !== undefined) this.player.volume(volume)
+
+      const muted = playerOptions.muted !== undefined ? playerOptions.muted : getStoredMute()
+      if (muted !== undefined) this.player.muted(muted)
+
+      this.defaultSubtitle = options.subtitle || getStoredLastSubtitle()
+
+      this.player.on('volumechange', () => {
+        saveVolumeInStore(this.player.volume())
+        saveMuteInStore(this.player.muted())
+      })
+
+      this.player.textTracks().on('change', () => {
+        const showing = this.player.textTracks().tracks_.find((t: { kind: string, mode: string }) => {
+          return t.kind === 'captions' && t.mode === 'showing'
+        })
+
+        if (!showing) {
+          saveLastSubtitle('off')
+          return
+        }
+
+        saveLastSubtitle(showing.language)
+      })
+
+      this.player.on('sourcechange', () => this.initCaptions())
+
+      this.player.duration(options.videoDuration)
+
+      this.initializePlayer()
+      this.runViewAdd()
+
+      if (options.userWatching) this.runUserWatchVideo(options.userWatching)
+    })
+  }
+
+  dispose () {
+    clearTimeout(this.qualityObservationTimer)
+
+    clearInterval(this.videoViewInterval)
+
+    if (this.userWatchingVideoInterval) clearInterval(this.userWatchingVideoInterval)
+  }
+
+  private initializePlayer () {
+    if (isMobile()) this.player.addClass('vjs-is-mobile')
+
+    this.initSmoothProgressBar()
+
+    this.initCaptions()
+
+    this.alterInactivity()
+  }
+
+  private runViewAdd () {
+    this.clearVideoViewInterval()
+
+    // After 30 seconds (or 3/4 of the video), add a view to the video
+    let minSecondsToView = 30
+
+    if (this.videoDuration < minSecondsToView) minSecondsToView = (this.videoDuration * 3) / 4
+
+    let secondsViewed = 0
+    this.videoViewInterval = setInterval(() => {
+      if (this.player && !this.player.paused()) {
+        secondsViewed += 1
+
+        if (secondsViewed > minSecondsToView) {
+          this.clearVideoViewInterval()
+
+          this.addViewToVideo().catch(err => console.error(err))
+        }
+      }
+    }, 1000)
+  }
+
+  private runUserWatchVideo (options: UserWatching) {
+    let lastCurrentTime = 0
+
+    this.userWatchingVideoInterval = setInterval(() => {
+      const currentTime = Math.floor(this.player.currentTime())
+
+      if (currentTime - lastCurrentTime >= 1) {
+        lastCurrentTime = currentTime
+
+        this.notifyUserIsWatching(currentTime, options.url, options.authorizationHeader)
+          .catch(err => console.error('Cannot notify user is watching.', err))
+      }
+    }, this.CONSTANTS.USER_WATCHING_VIDEO_INTERVAL)
+  }
+
+  private clearVideoViewInterval () {
+    if (this.videoViewInterval !== undefined) {
+      clearInterval(this.videoViewInterval)
+      this.videoViewInterval = undefined
+    }
+  }
+
+  private addViewToVideo () {
+    if (!this.videoViewUrl) return Promise.resolve(undefined)
+
+    return fetch(this.videoViewUrl, { method: 'POST' })
+  }
+
+  private notifyUserIsWatching (currentTime: number, url: string, authorizationHeader: string) {
+    const body = new URLSearchParams()
+    body.append('currentTime', currentTime.toString())
+
+    const headers = new Headers({ 'Authorization': authorizationHeader })
+
+    return fetch(url, { method: 'PUT', body, headers })
+  }
+
+  private alterInactivity () {
+    let saveInactivityTimeout: number
+
+    const disableInactivity = () => {
+      saveInactivityTimeout = this.player.options_.inactivityTimeout
+      this.player.options_.inactivityTimeout = 0
+    }
+    const enableInactivity = () => {
+      this.player.options_.inactivityTimeout = saveInactivityTimeout
+    }
+
+    const settingsDialog = this.player.children_.find((c: any) => c.name_ === 'SettingsDialog')
+
+    this.player.controlBar.on('mouseenter', () => disableInactivity())
+    settingsDialog.on('mouseenter', () => disableInactivity())
+    this.player.controlBar.on('mouseleave', () => enableInactivity())
+    settingsDialog.on('mouseleave', () => enableInactivity())
+  }
+
+  private initCaptions () {
+    for (const caption of this.videoCaptions) {
+      this.player.addRemoteTextTrack({
+        kind: 'captions',
+        label: caption.label,
+        language: caption.language,
+        id: caption.language,
+        src: caption.src,
+        default: this.defaultSubtitle === caption.language
+      }, false)
+    }
+
+    this.player.trigger('captionsChanged')
+  }
+
+  // Thanks: https://github.com/videojs/video.js/issues/4460#issuecomment-312861657
+  private initSmoothProgressBar () {
+    const SeekBar = videojsUntyped.getComponent('SeekBar')
+    SeekBar.prototype.getPercent = function getPercent () {
+      // Allows for smooth scrubbing, when player can't keep up.
+      // const time = (this.player_.scrubbing()) ?
+      //   this.player_.getCache().currentTime :
+      //   this.player_.currentTime()
+      const time = this.player_.currentTime()
+      const percent = time / this.player_.duration()
+      return percent >= 1 ? 1 : percent
+    }
+    SeekBar.prototype.handleMouseMove = function handleMouseMove (event: any) {
+      let newTime = this.calculateDistance(event) * this.player_.duration()
+      if (newTime === this.player_.duration()) {
+        newTime = newTime - 0.1
+      }
+      this.player_.currentTime(newTime)
+      this.update()
+    }
+  }
+}
+
+videojs.registerPlugin('peertube', PeerTubePlugin)
+export { PeerTubePlugin }