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1 | import { ChangeDetectorRef, Component, OnDestroy, OnInit } from '@angular/core'; | |
2 | import { ActivatedRoute, Router } from '@angular/router'; | |
3 | import { BehaviorSubject } from 'rxjs/BehaviorSubject'; | |
4 | ||
5 | import { NotificationsService } from 'angular2-notifications'; | |
6 | ||
7 | import { | |
8 | SortField, | |
9 | Video, | |
10 | VideoService | |
11 | } from '../shared'; | |
12 | import { AuthService, AuthUser } from '../../core'; | |
13 | import { RestPagination, Search, SearchField } from '../../shared'; | |
14 | import { SearchService } from '../../shared'; | |
15 | ||
16 | @Component({ | |
17 | selector: 'my-videos-list', | |
18 | styleUrls: [ './video-list.component.scss' ], | |
19 | templateUrl: './video-list.component.html' | |
20 | }) | |
21 | export class VideoListComponent implements OnInit, OnDestroy { | |
22 | loading: BehaviorSubject<boolean> = new BehaviorSubject(false); | |
23 | pagination: RestPagination = { | |
24 | currentPage: 1, | |
25 | itemsPerPage: 25, | |
26 | totalItems: null | |
27 | }; | |
28 | sort: SortField; | |
29 | user: AuthUser = null; | |
30 | videos: Video[] = []; | |
31 | ||
32 | private search: Search; | |
33 | private subActivatedRoute: any; | |
34 | private subSearch: any; | |
35 | ||
36 | constructor( | |
37 | private notificationsService: NotificationsService, | |
38 | private authService: AuthService, | |
39 | private changeDetector: ChangeDetectorRef, | |
40 | private router: Router, | |
41 | private route: ActivatedRoute, | |
42 | private videoService: VideoService, | |
43 | private searchService: SearchService | |
44 | ) {} | |
45 | ||
46 | ngOnInit() { | |
47 | if (this.authService.isLoggedIn()) { | |
48 | this.user = AuthUser.load(); | |
49 | } | |
50 | ||
51 | // Subscribe to route changes | |
52 | this.subActivatedRoute = this.route.params.subscribe(routeParams => { | |
53 | this.loadRouteParams(routeParams); | |
54 | ||
55 | // Update the search service component | |
56 | this.searchService.updateSearch.next(this.search); | |
57 | this.getVideos(); | |
58 | }); | |
59 | ||
60 | // Subscribe to search changes | |
61 | this.subSearch = this.searchService.searchUpdated.subscribe(search => { | |
62 | this.search = search; | |
63 | // Reset pagination | |
64 | this.pagination.currentPage = 1; | |
65 | ||
66 | this.navigateToNewParams(); | |
67 | }); | |
68 | } | |
69 | ||
70 | ngOnDestroy() { | |
71 | this.subActivatedRoute.unsubscribe(); | |
72 | this.subSearch.unsubscribe(); | |
73 | } | |
74 | ||
75 | getVideos() { | |
76 | this.loading.next(true); | |
77 | this.videos = []; | |
78 | ||
79 | this.changeDetector.detectChanges(); | |
80 | ||
81 | let observable = null; | |
82 | ||
83 | if (this.search.value) { | |
84 | observable = this.videoService.searchVideos(this.search, this.pagination, this.sort); | |
85 | } else { | |
86 | observable = this.videoService.getVideos(this.pagination, this.sort); | |
87 | } | |
88 | ||
89 | observable.subscribe( | |
90 | ({ videos, totalVideos }) => { | |
91 | this.videos = videos; | |
92 | this.pagination.totalItems = totalVideos; | |
93 | ||
94 | this.loading.next(false); | |
95 | }, | |
96 | error => this.notificationsService.error('Error', error.text) | |
97 | ); | |
98 | } | |
99 | ||
100 | isThereNoVideo() { | |
101 | return !this.loading.getValue() && this.videos.length === 0; | |
102 | } | |
103 | ||
104 | onPageChanged(event: any) { | |
105 | // Be sure the current page is set | |
106 | this.pagination.currentPage = event.page; | |
107 | ||
108 | this.navigateToNewParams(); | |
109 | } | |
110 | ||
111 | onSort(sort: SortField) { | |
112 | this.sort = sort; | |
113 | ||
114 | this.navigateToNewParams(); | |
115 | } | |
116 | ||
117 | private buildRouteParams() { | |
118 | // There is always a sort and a current page | |
119 | const params: any = { | |
120 | sort: this.sort, | |
121 | page: this.pagination.currentPage | |
122 | }; | |
123 | ||
124 | // Maybe there is a search | |
125 | if (this.search.value) { | |
126 | params.field = this.search.field; | |
127 | params.search = this.search.value; | |
128 | } | |
129 | ||
130 | return params; | |
131 | } | |
132 | ||
133 | private loadRouteParams(routeParams) { | |
134 | if (routeParams['search'] !== undefined) { | |
135 | this.search = { | |
136 | value: routeParams['search'], | |
137 | field: <SearchField>routeParams['field'] | |
138 | }; | |
139 | } else { | |
140 | this.search = { | |
141 | value: '', | |
142 | field: 'name' | |
143 | }; | |
144 | } | |
145 | ||
146 | this.sort = <SortField>routeParams['sort'] || '-createdAt'; | |
147 | ||
148 | if (routeParams['page'] !== undefined) { | |
149 | this.pagination.currentPage = parseInt(routeParams['page']); | |
150 | } else { | |
151 | this.pagination.currentPage = 1; | |
152 | } | |
153 | ||
154 | this.changeDetector.detectChanges(); | |
155 | } | |
156 | ||
157 | private navigateToNewParams() { | |
158 | const routeParams = this.buildRouteParams(); | |
159 | this.router.navigate(['/videos/list', routeParams]); | |
160 | } | |
161 | } |