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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 { | |
6 | SortField, | |
7 | Video, | |
8 | VideoService | |
9 | } from '../shared'; | |
10 | import { AuthService } from '../../core'; | |
11 | import { AuthUser, RestPagination, Search, SearchField } from '../../shared'; | |
12 | import { SearchService } from '../../shared'; | |
13 | ||
14 | @Component({ | |
15 | selector: 'my-videos-list', | |
16 | styleUrls: [ './video-list.component.scss' ], | |
17 | templateUrl: './video-list.component.html' | |
18 | }) | |
19 | ||
20 | export class VideoListComponent implements OnInit, OnDestroy { | |
21 | loading: BehaviorSubject<boolean> = new BehaviorSubject(false); | |
22 | pagination: RestPagination = { | |
23 | currentPage: 1, | |
24 | itemsPerPage: 9, | |
25 | totalItems: null | |
26 | }; | |
27 | sort: SortField; | |
28 | user: AuthUser = null; | |
29 | videos: Video[] = []; | |
30 | ||
31 | private search: Search; | |
32 | private subActivatedRoute: any; | |
33 | private subSearch: any; | |
34 | ||
35 | constructor( | |
36 | private authService: AuthService, | |
37 | private changeDetector: ChangeDetectorRef, | |
38 | private router: Router, | |
39 | private route: ActivatedRoute, | |
40 | private videoService: VideoService, | |
41 | private searchService: SearchService | |
42 | ) {} | |
43 | ||
44 | ngOnInit() { | |
45 | if (this.authService.isLoggedIn()) { | |
46 | this.user = AuthUser.load(); | |
47 | } | |
48 | ||
49 | // Subscribe to route changes | |
50 | this.subActivatedRoute = this.route.params.subscribe(routeParams => { | |
51 | this.loadRouteParams(routeParams); | |
52 | ||
53 | // Update the search service component | |
54 | this.searchService.updateSearch.next(this.search); | |
55 | this.getVideos(); | |
56 | }); | |
57 | ||
58 | // Subscribe to search changes | |
59 | this.subSearch = this.searchService.searchUpdated.subscribe(search => { | |
60 | this.search = search; | |
61 | // Reset pagination | |
62 | this.pagination.currentPage = 1; | |
63 | ||
64 | this.navigateToNewParams(); | |
65 | }); | |
66 | } | |
67 | ||
68 | ngOnDestroy() { | |
69 | this.subActivatedRoute.unsubscribe(); | |
70 | this.subSearch.unsubscribe(); | |
71 | } | |
72 | ||
73 | getVideos() { | |
74 | this.loading.next(true); | |
75 | this.videos = []; | |
76 | ||
77 | this.changeDetector.detectChanges(); | |
78 | ||
79 | let observable = null; | |
80 | ||
81 | if (this.search.value) { | |
82 | observable = this.videoService.searchVideos(this.search, this.pagination, this.sort); | |
83 | } else { | |
84 | observable = this.videoService.getVideos(this.pagination, this.sort); | |
85 | } | |
86 | ||
87 | observable.subscribe( | |
88 | ({ videos, totalVideos }) => { | |
89 | this.videos = videos; | |
90 | this.pagination.totalItems = totalVideos; | |
91 | ||
92 | this.loading.next(false); | |
93 | }, | |
94 | error => alert(error.text) | |
95 | ); | |
96 | } | |
97 | ||
98 | isThereNoVideo() { | |
99 | return !this.loading.getValue() && this.videos.length === 0; | |
100 | } | |
101 | ||
102 | onPageChanged(event: any) { | |
103 | // Be sure the current page is set | |
104 | this.pagination.currentPage = event.page; | |
105 | ||
106 | this.navigateToNewParams(); | |
107 | } | |
108 | ||
109 | onRemoved(video: Video) { | |
110 | this.getVideos(); | |
111 | } | |
112 | ||
113 | onSort(sort: SortField) { | |
114 | this.sort = sort; | |
115 | ||
116 | this.navigateToNewParams(); | |
117 | } | |
118 | ||
119 | private buildRouteParams() { | |
120 | // There is always a sort and a current page | |
121 | const params: any = { | |
122 | sort: this.sort, | |
123 | page: this.pagination.currentPage | |
124 | }; | |
125 | ||
126 | // Maybe there is a search | |
127 | if (this.search.value) { | |
128 | params.field = this.search.field; | |
129 | params.search = this.search.value; | |
130 | } | |
131 | ||
132 | return params; | |
133 | } | |
134 | ||
135 | private loadRouteParams(routeParams) { | |
136 | if (routeParams['search'] !== undefined) { | |
137 | this.search = { | |
138 | value: routeParams['search'], | |
139 | field: <SearchField>routeParams['field'] | |
140 | }; | |
141 | } else { | |
142 | this.search = { | |
143 | value: '', | |
144 | field: 'name' | |
145 | }; | |
146 | } | |
147 | ||
148 | this.sort = <SortField>routeParams['sort'] || '-createdDate'; | |
149 | ||
150 | if (routeParams['page'] !== undefined) { | |
151 | this.pagination.currentPage = parseInt(routeParams['page']); | |
152 | } else { | |
153 | this.pagination.currentPage = 1; | |
154 | } | |
155 | ||
156 | this.changeDetector.detectChanges(); | |
157 | } | |
158 | ||
159 | private navigateToNewParams() { | |
160 | const routeParams = this.buildRouteParams(); | |
161 | this.router.navigate(['/videos/list', routeParams]); | |
162 | } | |
163 | } |