client/src/app/videos/shared/video.service.ts

   1 import { Injectable } from '@angular/core';
   2 import { Http, Response, URLSearchParams } from '@angular/http';
   3 import { Observable } from 'rxjs/Observable';
   4
   5 import { Pagination } from './pagination.model';
   6 import { Search } from '../../shared';
   7 import { SortField } from './sort-field.type';
   8 import { AuthHttp, AuthService } from '../../shared';
   9 import { Video } from './video.model';
  10
  11 @Injectable()
  12 export class VideoService {
  13   private static BASE_VIDEO_URL = '/api/v1/videos/';
  14
  15   constructor(
  16     private authService: AuthService,
  17     private authHttp: AuthHttp,
  18     private http: Http
  19   ) {}
  20
  21   getVideo(id: string) {
  22     return this.http.get(VideoService.BASE_VIDEO_URL + id)
  23                     .map(res => <Video> res.json())
  24                     .catch(this.handleError);
  25   }
  26
  27   getVideos(pagination: Pagination, sort: SortField) {
  28     const params = this.createPaginationParams(pagination);
  29
  30     if (sort) params.set('sort', sort);
  31
  32     return this.http.get(VideoService.BASE_VIDEO_URL, { search: params })
  33                     .map(res => res.json())
  34                     .map(this.extractVideos)
  35                     .catch(this.handleError);
  36   }
  37
  38   removeVideo(id: string) {
  39     return this.authHttp.delete(VideoService.BASE_VIDEO_URL + id)
  40                         .map(res => <number> res.status)
  41                         .catch(this.handleError);
  42   }
  43
  44   searchVideos(search: Search, pagination: Pagination, sort: SortField) {
  45     const params = this.createPaginationParams(pagination);
  46
  47     if (search.field) params.set('field', search.field);
  48     if (sort) params.set('sort', sort);
  49
  50     return this.http.get(VideoService.BASE_VIDEO_URL + 'search/' + encodeURIComponent(search.value), { search: params })
  51                     .map(res => res.json())
  52                     .map(this.extractVideos)
  53                     .catch(this.handleError);
  54   }
  55
  56   private createPaginationParams(pagination: Pagination) {
  57     const params = new URLSearchParams();
  58     const start: number = (pagination.currentPage - 1) * pagination.itemsPerPage;
  59     const count: number = pagination.itemsPerPage;
  60
  61     params.set('start', start.toString());
  62     params.set('count', count.toString());
  63
  64     return params;
  65   }
  66
  67   private extractVideos(body: any) {
  68     const videos_json = body.data;
  69     const totalVideos = body.total;
  70     const videos = [];
  71     for (const video_json of videos_json) {
  72       videos.push(new Video(video_json));
  73     }
  74
  75     return { videos, totalVideos };
  76   }
  77
  78   private handleError(error: Response) {
  79     console.error(error);
  80     return Observable.throw(error.json().error || 'Server error');
  81   }
  82 }