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

   1 import { Component, ElementRef, NgZone, OnDestroy, OnInit } from '@angular/core';
   2 import { ActivatedRoute } from '@angular/router';
   3
   4 import { Video, VideoService } from '../shared';
   5 import { WebTorrentService } from './webtorrent.service';
   6
   7 @Component({
   8   selector: 'my-video-watch',
   9   templateUrl: './video-watch.component.html',
  10   styleUrls: [ './video-watch.component.scss' ]
  11 })
  12
  13 export class VideoWatchComponent implements OnInit, OnDestroy {
  14   private static LOADTIME_TOO_LONG: number = 30000;
  15
  16   downloadSpeed: number;
  17   error: boolean = false;
  18   loading: boolean = false;
  19   numPeers: number;
  20   uploadSpeed: number;
  21   video: Video = null;
  22
  23   private errorTimer: NodeJS.Timer;
  24   private sub: any;
  25   private torrentInfosInterval: NodeJS.Timer;
  26
  27   constructor(
  28     private elementRef: ElementRef,
  29     private ngZone: NgZone,
  30     private route: ActivatedRoute,
  31     private videoService: VideoService,
  32     private webTorrentService: WebTorrentService
  33   ) {}
  34
  35   ngOnInit() {
  36     this.sub = this.route.params.subscribe(routeParams => {
  37       let id = routeParams['id'];
  38       this.videoService.getVideo(id).subscribe(
  39         video => {
  40           this.video = video;
  41           this.loadVideo();
  42         },
  43         error => alert(error.text)
  44       );
  45     });
  46   }
  47
  48   ngOnDestroy() {
  49     console.log('Removing video from webtorrent.');
  50     clearInterval(this.torrentInfosInterval);
  51     clearTimeout(this.errorTimer);
  52     this.webTorrentService.remove(this.video.magnetUri);
  53
  54     this.sub.unsubscribe();
  55   }
  56
  57   loadVideo() {
  58     // Reset the error
  59     this.error = false;
  60     // We are loading the video
  61     this.loading = true;
  62
  63     console.log('Adding ' + this.video.magnetUri + '.');
  64
  65     // The callback might never return if there are network issues
  66     // So we create a timer to inform the user the load is abnormally long
  67     this.errorTimer = setTimeout(() => this.loadTooLong(), VideoWatchComponent.LOADTIME_TOO_LONG);
  68
  69     this.webTorrentService.add(this.video.magnetUri, (torrent) => {
  70       // Clear the error timer
  71       clearTimeout(this.errorTimer);
  72       // Maybe the error was fired by the timer, so reset it
  73       this.error = false;
  74
  75       // We are not loading the video anymore
  76       this.loading = false;
  77
  78       console.log('Added ' + this.video.magnetUri + '.');
  79       torrent.files[0].appendTo(this.elementRef.nativeElement.querySelector('.embed-responsive'), (err) => {
  80         if (err) {
  81           alert('Cannot append the file.');
  82           console.error(err);
  83         }
  84       });
  85
  86       this.runInProgress(torrent);
  87     });
  88   }
  89
  90   private loadTooLong() {
  91     this.error = true;
  92     console.error('The video load seems to be abnormally long.');
  93   }
  94
  95   private runInProgress(torrent: any) {
  96     // Refresh each second
  97     this.torrentInfosInterval = setInterval(() => {
  98       this.ngZone.run(() => {
  99         this.downloadSpeed = torrent.downloadSpeed;
 100         this.numPeers = torrent.numPeers;
 101         this.uploadSpeed = torrent.uploadSpeed;
 102       });
 103     }, 1000);
 104   }
 105 }