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

   1 import { Component, ElementRef, OnDestroy, OnInit } from '@angular/core';
   2 import { ActivatedRoute } 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, OnDestroy {
  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 sub: any;
  30   private torrentInfosInterval: NodeJS.Timer;
  31
  32   constructor(
  33     private elementRef: ElementRef,
  34     private route: ActivatedRoute,
  35     private videoService: VideoService,
  36     private webTorrentService: WebTorrentService
  37   ) {}
  38
  39   loadVideo() {
  40     // Reset the error
  41     this.error = false;
  42     // We are loading the video
  43     this.loading = true;
  44
  45     console.log('Adding ' + this.video.magnetUri + '.');
  46
  47     // The callback might never return if there are network issues
  48     // So we create a timer to inform the user the load is abnormally long
  49     this.errorTimer = setTimeout(() => this.loadTooLong(), VideoWatchComponent.LOADTIME_TOO_LONG);
  50
  51     this.webTorrentService.add(this.video.magnetUri, (torrent) => {
  52       // Clear the error timer
  53       clearTimeout(this.errorTimer);
  54       // Maybe the error was fired by the timer, so reset it
  55       this.error = false;
  56
  57       // We are not loading the video anymore
  58       this.loading = false;
  59
  60       console.log('Added ' + this.video.magnetUri + '.');
  61       torrent.files[0].appendTo(this.elementRef.nativeElement.querySelector('.embed-responsive'), (err) => {
  62         if (err) {
  63           alert('Cannot append the file.');
  64           console.error(err);
  65         }
  66       });
  67
  68       // Refresh each second
  69       this.torrentInfosInterval = setInterval(() => {
  70         this.downloadSpeed = torrent.downloadSpeed;
  71         this.numPeers = torrent.numPeers;
  72         this.uploadSpeed = torrent.uploadSpeed;
  73       }, 1000);
  74     });
  75   }
  76
  77   ngOnDestroy() {
  78     console.log('Removing video from webtorrent.');
  79     clearInterval(this.torrentInfosInterval);
  80     clearTimeout(this.errorTimer);
  81     this.webTorrentService.remove(this.video.magnetUri);
  82
  83     this.sub.unsubscribe();
  84   }
  85
  86   ngOnInit() {
  87     this.sub = this.route.params.subscribe(routeParams => {
  88       let id = routeParams['id'];
  89       this.videoService.getVideo(id).subscribe(
  90         video => {
  91           this.video = video;
  92           this.loadVideo();
  93         },
  94         error => alert(error)
  95       );
  96     });
  97   }
  98
  99   private loadTooLong() {
 100     this.error = true;
 101     console.error('The video load seems to be abnormally long.');
 102   }
 103 }