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

   1 import { Component, ElementRef, NgZone, OnDestroy, OnInit, ViewChild } from '@angular/core';
   2 import { ActivatedRoute, Router } from '@angular/router';
   3 import { Observable } from 'rxjs/Observable';
   4 import { Subscription } from 'rxjs/Subscription';
   5
   6 import * as videojs from 'video.js';
   7 import { MetaService } from '@nglibs/meta';
   8 import { NotificationsService } from 'angular2-notifications';
   9
  10 import { AuthService, ConfirmService } from '../../core';
  11 import { VideoMagnetComponent } from './video-magnet.component';
  12 import { VideoShareComponent } from './video-share.component';
  13 import { VideoReportComponent } from './video-report.component';
  14 import { RateType, Video, VideoService } from '../shared';
  15 import { WebTorrentService } from './webtorrent.service';
  16
  17 @Component({
  18   selector: 'my-video-watch',
  19   templateUrl: './video-watch.component.html',
  20   styleUrls: [ './video-watch.component.scss' ]
  21 })
  22
  23 export class VideoWatchComponent implements OnInit, OnDestroy {
  24   private static LOADTIME_TOO_LONG: number = 20000;
  25
  26   @ViewChild('videoMagnetModal') videoMagnetModal: VideoMagnetComponent;
  27   @ViewChild('videoShareModal') videoShareModal: VideoShareComponent;
  28   @ViewChild('videoReportModal') videoReportModal: VideoReportComponent;
  29
  30   downloadSpeed: number;
  31   error: boolean = false;
  32   loading: boolean = false;
  33   numPeers: number;
  34   player: VideoJSPlayer;
  35   playerElement: Element;
  36   uploadSpeed: number;
  37   userRating: RateType = null;
  38   video: Video = null;
  39   videoNotFound = false;
  40
  41   private errorTimer: number;
  42   private paramsSub: Subscription;
  43   private errorsSub: Subscription;
  44   private warningsSub: Subscription;
  45   private torrentInfosInterval: number;
  46
  47   constructor(
  48     private elementRef: ElementRef,
  49     private ngZone: NgZone,
  50     private route: ActivatedRoute,
  51     private router: Router,
  52     private videoService: VideoService,
  53     private confirmService: ConfirmService,
  54     private metaService: MetaService,
  55     private webTorrentService: WebTorrentService,
  56     private authService: AuthService,
  57     private notificationsService: NotificationsService
  58   ) {}
  59
  60   ngOnInit() {
  61     this.paramsSub = this.route.params.subscribe(routeParams => {
  62       let id = routeParams['id'];
  63       this.videoService.getVideo(id).subscribe(
  64         video => this.onVideoFetched(video),
  65
  66         error => this.videoNotFound = true
  67       );
  68     });
  69
  70     this.playerElement = this.elementRef.nativeElement.querySelector('#video-container');
  71
  72     const videojsOptions = {
  73       controls: true,
  74       autoplay: false
  75     };
  76
  77     const self = this;
  78     videojs(this.playerElement, videojsOptions, function () {
  79       self.player = this;
  80     });
  81
  82     this.errorsSub = this.webTorrentService.errors.subscribe(err => this.notificationsService.error('Error', err.message));
  83     this.warningsSub = this.webTorrentService.errors.subscribe(err => this.notificationsService.alert('Warning', err.message));
  84   }
  85
  86   ngOnDestroy() {
  87     // Remove WebTorrent stuff
  88     console.log('Removing video from webtorrent.');
  89     window.clearInterval(this.torrentInfosInterval);
  90     window.clearTimeout(this.errorTimer);
  91
  92     if (this.video !== null && this.webTorrentService.has(this.video.magnetUri)) {
  93       this.webTorrentService.remove(this.video.magnetUri);
  94     }
  95
  96     // Remove player
  97     videojs(this.playerElement).dispose();
  98
  99     // Unsubscribe subscriptions
 100     this.paramsSub.unsubscribe();
 101     this.errorsSub.unsubscribe();
 102     this.warningsSub.unsubscribe();
 103   }
 104
 105   loadVideo() {
 106     // Reset the error
 107     this.error = false;
 108     // We are loading the video
 109     this.loading = true;
 110
 111     console.log('Adding ' + this.video.magnetUri + '.');
 112
 113     // The callback might never return if there are network issues
 114     // So we create a timer to inform the user the load is abnormally long
 115     this.errorTimer = window.setTimeout(() => this.loadTooLong(), VideoWatchComponent.LOADTIME_TOO_LONG);
 116
 117     this.webTorrentService.add(this.video.magnetUri, (torrent) => {
 118       // Clear the error timer
 119       window.clearTimeout(this.errorTimer);
 120       // Maybe the error was fired by the timer, so reset it
 121       this.error = false;
 122
 123       // We are not loading the video anymore
 124       this.loading = false;
 125
 126       console.log('Added ' + this.video.magnetUri + '.');
 127       torrent.files[0].renderTo(this.playerElement, { autoplay: true }, (err) => {
 128         if (err) {
 129           this.notificationsService.error('Error', 'Cannot append the file in the video element.');
 130           console.error(err);
 131         }
 132       });
 133
 134       this.runInProgress(torrent);
 135     });
 136   }
 137
 138   setLike() {
 139     if (this.isUserLoggedIn() === false) return;
 140     // Already liked this video
 141     if (this.userRating === 'like') return;
 142
 143     this.videoService.setVideoLike(this.video.id)
 144                      .subscribe(
 145                       () => {
 146                         // Update the video like attribute
 147                         this.updateVideoRating(this.userRating, 'like');
 148                         this.userRating = 'like';
 149                       },
 150
 151                       err => this.notificationsService.error('Error', err.text)
 152                      );
 153   }
 154
 155   setDislike() {
 156     if (this.isUserLoggedIn() === false) return;
 157     // Already disliked this video
 158     if (this.userRating === 'dislike') return;
 159
 160     this.videoService.setVideoDislike(this.video.id)
 161                      .subscribe(
 162                       () => {
 163                         // Update the video dislike attribute
 164                         this.updateVideoRating(this.userRating, 'dislike');
 165                         this.userRating = 'dislike';
 166                       },
 167
 168                       err => this.notificationsService.error('Error', err.text)
 169                      );
 170   }
 171
 172   showReportModal(event: Event) {
 173     event.preventDefault();
 174     this.videoReportModal.show();
 175   }
 176
 177   showShareModal() {
 178     this.videoShareModal.show();
 179   }
 180
 181   showMagnetUriModal(event: Event) {
 182     event.preventDefault();
 183     this.videoMagnetModal.show();
 184   }
 185
 186   isUserLoggedIn() {
 187     return this.authService.isLoggedIn();
 188   }
 189
 190   canUserUpdateVideo() {
 191     return this.authService.getUser() !== null &&
 192            this.authService.getUser().username === this.video.author;
 193   }
 194
 195   private checkUserRating() {
 196     // Unlogged users do not have ratings
 197     if (this.isUserLoggedIn() === false) return;
 198
 199     this.videoService.getUserVideoRating(this.video.id)
 200                      .subscribe(
 201                        ratingObject => {
 202                          if (ratingObject) {
 203                            this.userRating = ratingObject.rating;
 204                          }
 205                        },
 206
 207                        err => this.notificationsService.error('Error', err.text)
 208                       );
 209   }
 210
 211   private onVideoFetched(video: Video) {
 212     this.video = video;
 213
 214     let observable;
 215     if (this.video.isVideoNSFWForUser(this.authService.getUser())) {
 216       observable = this.confirmService.confirm('This video is not safe for work. Are you sure you want to watch it?', 'NSFW');
 217     } else {
 218       observable = Observable.of(true);
 219     }
 220
 221     observable.subscribe(
 222       res => {
 223         if (res === false) {
 224           return this.router.navigate([ '/videos/list' ]);
 225         }
 226
 227         this.setOpenGraphTags();
 228         this.loadVideo();
 229         this.checkUserRating();
 230       }
 231     );
 232   }
 233
 234   private updateVideoRating(oldRating: RateType, newRating: RateType) {
 235     let likesToIncrement = 0;
 236     let dislikesToIncrement = 0;
 237
 238     if (oldRating) {
 239       if (oldRating === 'like') likesToIncrement--;
 240       if (oldRating === 'dislike') dislikesToIncrement--;
 241     }
 242
 243     if (newRating === 'like') likesToIncrement++;
 244     if (newRating === 'dislike') dislikesToIncrement++;
 245
 246     this.video.likes += likesToIncrement;
 247     this.video.dislikes += dislikesToIncrement;
 248   }
 249
 250   private loadTooLong() {
 251     this.error = true;
 252     console.error('The video load seems to be abnormally long.');
 253   }
 254
 255   private setOpenGraphTags() {
 256     this.metaService.setTitle(this.video.name);
 257
 258     this.metaService.setTag('og:type', 'video');
 259
 260     this.metaService.setTag('og:title', this.video.name);
 261     this.metaService.setTag('name', this.video.name);
 262
 263     this.metaService.setTag('og:description', this.video.description);
 264     this.metaService.setTag('description', this.video.description);
 265
 266     this.metaService.setTag('og:image', this.video.thumbnailPath);
 267
 268     this.metaService.setTag('og:duration', this.video.duration);
 269
 270     this.metaService.setTag('og:site_name', 'PeerTube');
 271
 272     this.metaService.setTag('og:url', window.location.href);
 273     this.metaService.setTag('url', window.location.href);
 274   }
 275
 276   private runInProgress(torrent: any) {
 277     // Refresh each second
 278     this.torrentInfosInterval = window.setInterval(() => {
 279       this.ngZone.run(() => {
 280         this.downloadSpeed = torrent.downloadSpeed;
 281         this.numPeers = torrent.numPeers;
 282         this.uploadSpeed = torrent.uploadSpeed;
 283       });
 284     }, 1000);
 285   }
 286 }