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

   1 import { Component, ElementRef, NgZone, OnDestroy, OnInit, ViewChild } from '@angular/core';
   2 import { ActivatedRoute } from '@angular/router';
   3 import { Subscription } from 'rxjs/Subscription';
   4
   5 import * as videojs from 'video.js';
   6 import { MetaService } from 'ng2-meta';
   7 import { NotificationsService } from 'angular2-notifications';
   8
   9 import { AuthService } from '../../core';
  10 import { VideoMagnetComponent } from './video-magnet.component';
  11 import { VideoShareComponent } from './video-share.component';
  12 import { VideoReportComponent } from './video-report.component';
  13 import { RateType, Video, VideoService } from '../shared';
  14 import { WebTorrentService } from './webtorrent.service';
  15
  16 @Component({
  17   selector: 'my-video-watch',
  18   templateUrl: './video-watch.component.html',
  19   styleUrls: [ './video-watch.component.scss' ]
  20 })
  21
  22 export class VideoWatchComponent implements OnInit, OnDestroy {
  23   private static LOADTIME_TOO_LONG: number = 20000;
  24
  25   @ViewChild('videoMagnetModal') videoMagnetModal: VideoMagnetComponent;
  26   @ViewChild('videoShareModal') videoShareModal: VideoShareComponent;
  27   @ViewChild('videoReportModal') videoReportModal: VideoReportComponent;
  28
  29   downloadSpeed: number;
  30   error: boolean = false;
  31   loading: boolean = false;
  32   numPeers: number;
  33   player: VideoJSPlayer;
  34   playerElement: Element;
  35   uploadSpeed: number;
  36   userRating: RateType = null;
  37   video: Video = null;
  38   videoNotFound = false;
  39
  40   private errorTimer: number;
  41   private paramsSub: Subscription;
  42   private errorsSub: Subscription;
  43   private warningsSub: Subscription;
  44   private torrentInfosInterval: number;
  45
  46   constructor(
  47     private elementRef: ElementRef,
  48     private ngZone: NgZone,
  49     private route: ActivatedRoute,
  50     private videoService: VideoService,
  51     private metaService: MetaService,
  52     private webTorrentService: WebTorrentService,
  53     private authService: AuthService,
  54     private notificationsService: NotificationsService
  55   ) {}
  56
  57   ngOnInit() {
  58     this.paramsSub = this.route.params.subscribe(routeParams => {
  59       let id = routeParams['id'];
  60       this.videoService.getVideo(id).subscribe(
  61         video => {
  62           this.video = video;
  63           this.setOpenGraphTags();
  64           this.loadVideo();
  65           this.checkUserRating();
  66         },
  67         error => {
  68           this.videoNotFound = true;
  69         }
  70       );
  71     });
  72
  73     this.playerElement = this.elementRef.nativeElement.querySelector('#video-container');
  74
  75     const videojsOptions = {
  76       controls: true,
  77       autoplay: false
  78     };
  79
  80     const self = this;
  81     videojs(this.playerElement, videojsOptions, function () {
  82       self.player = this;
  83     });
  84
  85     this.errorsSub = this.webTorrentService.errors.subscribe(err => this.notificationsService.error('Error', err.message));
  86     this.warningsSub = this.webTorrentService.errors.subscribe(err => this.notificationsService.alert('Warning', err.message));
  87   }
  88
  89   ngOnDestroy() {
  90     // Remove WebTorrent stuff
  91     console.log('Removing video from webtorrent.');
  92     window.clearInterval(this.torrentInfosInterval);
  93     window.clearTimeout(this.errorTimer);
  94
  95     if (this.video !== null) {
  96       this.webTorrentService.remove(this.video.magnetUri);
  97     }
  98
  99     // Remove player
 100     videojs(this.playerElement).dispose();
 101
 102     // Unsubscribe subscriptions
 103     this.paramsSub.unsubscribe();
 104     this.errorsSub.unsubscribe();
 105     this.warningsSub.unsubscribe();
 106   }
 107
 108   loadVideo() {
 109     // Reset the error
 110     this.error = false;
 111     // We are loading the video
 112     this.loading = true;
 113
 114     console.log('Adding ' + this.video.magnetUri + '.');
 115
 116     // The callback might never return if there are network issues
 117     // So we create a timer to inform the user the load is abnormally long
 118     this.errorTimer = window.setTimeout(() => this.loadTooLong(), VideoWatchComponent.LOADTIME_TOO_LONG);
 119
 120     this.webTorrentService.add(this.video.magnetUri, (torrent) => {
 121       // Clear the error timer
 122       window.clearTimeout(this.errorTimer);
 123       // Maybe the error was fired by the timer, so reset it
 124       this.error = false;
 125
 126       // We are not loading the video anymore
 127       this.loading = false;
 128
 129       console.log('Added ' + this.video.magnetUri + '.');
 130       torrent.files[0].renderTo(this.playerElement, { autoplay: true }, (err) => {
 131         if (err) {
 132           this.notificationsService.error('Error', 'Cannot append the file in the video element.');
 133           console.error(err);
 134         }
 135       });
 136
 137       this.runInProgress(torrent);
 138     });
 139   }
 140
 141   setLike() {
 142     if (this.isUserLoggedIn() === false) return;
 143     // Already liked this video
 144     if (this.userRating === 'like') return;
 145
 146     this.videoService.setVideoLike(this.video.id)
 147                      .subscribe(
 148                       () => {
 149                         // Update the video like attribute
 150                         this.updateVideoRating(this.userRating, 'like');
 151                         this.userRating = 'like';
 152                       },
 153
 154                       err => this.notificationsService.error('Error', err.text)
 155                      );
 156   }
 157
 158   setDislike() {
 159     if (this.isUserLoggedIn() === false) return;
 160     // Already disliked this video
 161     if (this.userRating === 'dislike') return;
 162
 163     this.videoService.setVideoDislike(this.video.id)
 164                      .subscribe(
 165                       () => {
 166                         // Update the video dislike attribute
 167                         this.updateVideoRating(this.userRating, 'dislike');
 168                         this.userRating = 'dislike';
 169                       },
 170
 171                       err => this.notificationsService.error('Error', err.text)
 172                      );
 173   }
 174
 175   showReportModal(event: Event) {
 176     event.preventDefault();
 177     this.videoReportModal.show();
 178   }
 179
 180   showShareModal() {
 181     this.videoShareModal.show();
 182   }
 183
 184   showMagnetUriModal(event: Event) {
 185     event.preventDefault();
 186     this.videoMagnetModal.show();
 187   }
 188
 189   isUserLoggedIn() {
 190     return this.authService.isLoggedIn();
 191   }
 192
 193   private checkUserRating() {
 194     // Unlogged users do not have ratings
 195     if (this.isUserLoggedIn() === false) return;
 196
 197     this.videoService.getUserVideoRating(this.video.id)
 198                      .subscribe(
 199                        ratingObject => {
 200                          if (ratingObject) {
 201                            this.userRating = ratingObject.rating;
 202                          }
 203                        },
 204
 205                        err => this.notificationsService.error('Error', err.text)
 206                       );
 207   }
 208
 209   private updateVideoRating(oldRating: RateType, newRating: RateType) {
 210     let likesToIncrement = 0;
 211     let dislikesToIncrement = 0;
 212
 213     if (oldRating) {
 214       if (oldRating === 'like') likesToIncrement--;
 215       if (oldRating === 'dislike') dislikesToIncrement--;
 216     }
 217
 218     if (newRating === 'like') likesToIncrement++;
 219     if (newRating === 'dislike') dislikesToIncrement++;
 220
 221     this.video.likes += likesToIncrement;
 222     this.video.dislikes += dislikesToIncrement;
 223   }
 224
 225   private loadTooLong() {
 226     this.error = true;
 227     console.error('The video load seems to be abnormally long.');
 228   }
 229
 230   private setOpenGraphTags() {
 231     this.metaService.setTag('og:type', 'video');
 232
 233     this.metaService.setTag('og:title', this.video.name);
 234     this.metaService.setTag('name', this.video.name);
 235
 236     this.metaService.setTag('og:description', this.video.description);
 237     this.metaService.setTag('description', this.video.description);
 238
 239     this.metaService.setTag('og:image', this.video.thumbnailPath);
 240
 241     this.metaService.setTag('og:duration', this.video.duration);
 242
 243     this.metaService.setTag('og:site_name', 'PeerTube');
 244
 245     this.metaService.setTag('og:url', window.location.href);
 246     this.metaService.setTag('url', window.location.href);
 247   }
 248
 249   private runInProgress(torrent: any) {
 250     // Refresh each second
 251     this.torrentInfosInterval = window.setInterval(() => {
 252       this.ngZone.run(() => {
 253         this.downloadSpeed = torrent.downloadSpeed;
 254         this.numPeers = torrent.numPeers;
 255         this.uploadSpeed = torrent.uploadSpeed;
 256       });
 257     }, 1000);
 258   }
 259 }