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

   1 import { Component, ElementRef, OnInit } from '@angular/core';
   2 import { CanDeactivate, RouteSegment } from '@angular/router';
   3
   4 import { BytesPipe } from 'angular-pipes/src/math/bytes.pipe';
   5
   6 import { LoaderComponent, Video, VideoService } from '../shared';
   7 import { WebTorrentService } from './webtorrent.service';
   8
   9 @Component({
  10   selector: 'my-video-watch',
  11   template: require('./video-watch.component.html'),
  12   styles: [ require('./video-watch.component.scss') ],
  13   providers: [ WebTorrentService ],
  14   directives: [ LoaderComponent ],
  15   pipes: [ BytesPipe ]
  16 })
  17
  18 export class VideoWatchComponent implements OnInit, CanDeactivate {
  19   private static LOADTIME_TOO_LONG: number = 30000;
  20
  21   downloadSpeed: number;
  22   error: boolean = false;
  23   loading: boolean = false;
  24   numPeers: number;
  25   uploadSpeed: number;
  26   video: Video;
  27
  28   private errorTimer: NodeJS.Timer;
  29   private torrentInfosInterval: NodeJS.Timer;
  30
  31   constructor(
  32     private elementRef: ElementRef,
  33     private routeSegment: RouteSegment,
  34     private videoService: VideoService,
  35     private webTorrentService: WebTorrentService
  36   ) {}
  37
  38   loadVideo() {
  39     // Reset the error
  40     this.error = false;
  41     // We are loading the video
  42     this.loading = true;
  43
  44     console.log('Adding ' + this.video.magnetUri + '.');
  45
  46     // The callback might never return if there are network issues
  47     // So we create a timer to inform the user the load is abnormally long
  48     this.errorTimer = setTimeout(() => this.loadTooLong(), VideoWatchComponent.LOADTIME_TOO_LONG);
  49
  50     this.webTorrentService.add(this.video.magnetUri, (torrent) => {
  51       // Clear the error timer
  52       clearTimeout(this.errorTimer);
  53       // Maybe the error was fired by the timer, so reset it
  54       this.error = false;
  55
  56       // We are not loading the video anymore
  57       this.loading = false;
  58
  59       console.log('Added ' + this.video.magnetUri + '.');
  60       torrent.files[0].appendTo(this.elementRef.nativeElement.querySelector('.embed-responsive'), (err) => {
  61         if (err) {
  62           alert('Cannot append the file.');
  63           console.error(err);
  64         }
  65       });
  66
  67       // Refresh each second
  68       this.torrentInfosInterval = setInterval(() => {
  69         this.downloadSpeed = torrent.downloadSpeed;
  70         this.numPeers = torrent.numPeers;
  71         this.uploadSpeed = torrent.uploadSpeed;
  72       }, 1000);
  73     });
  74   }
  75
  76   ngOnInit() {
  77     let id = this.routeSegment.getParam('id');
  78     this.videoService.getVideo(id).subscribe(
  79       video => {
  80         this.video = video;
  81         this.loadVideo();
  82       },
  83       error => alert(error)
  84     );
  85   }
  86
  87   routerCanDeactivate() {
  88     console.log('Removing video from webtorrent.');
  89     clearInterval(this.torrentInfosInterval);
  90     this.webTorrentService.remove(this.video.magnetUri);
  91     return Promise.resolve(true);
  92   }
  93
  94   private loadTooLong() {
  95     this.error = true;
  96     console.error('The video load seems to be abnormally long.');
  97   }
  98 }