]>
Commit | Line | Data |
---|---|---|
f3aaa9a9 | 1 | import { OnInit } from '@angular/core' |
fd45e8f4 | 2 | import { ActivatedRoute, Router } from '@angular/router' |
fd45e8f4 | 3 | import { NotificationsService } from 'angular2-notifications' |
9bf9d2a5 | 4 | import { Observable } from 'rxjs/Observable' |
b2731bff | 5 | import { AuthService } from '../../core/auth' |
4635f59d | 6 | import { ComponentPagination } from '../rest/component-pagination.model' |
202f6b6c | 7 | import { SortField } from './sort-field.type' |
202f6b6c | 8 | import { Video } from './video.model' |
fd45e8f4 | 9 | |
f3aaa9a9 | 10 | export abstract class AbstractVideoList implements OnInit { |
4635f59d | 11 | pagination: ComponentPagination = { |
fd45e8f4 C |
12 | currentPage: 1, |
13 | itemsPerPage: 25, | |
14 | totalItems: null | |
15 | } | |
9bf9d2a5 | 16 | sort: SortField = '-createdAt' |
f3aaa9a9 | 17 | defaultSort: SortField = '-createdAt' |
fd45e8f4 | 18 | videos: Video[] = [] |
f3aaa9a9 | 19 | loadOnInit = true |
fd45e8f4 | 20 | |
b2731bff C |
21 | protected abstract notificationsService: NotificationsService |
22 | protected abstract authService: AuthService | |
23 | protected abstract router: Router | |
24 | protected abstract route: ActivatedRoute | |
fd45e8f4 | 25 | |
2bbb3412 C |
26 | protected abstract currentRoute: string |
27 | ||
9bf9d2a5 | 28 | abstract titlePage: string |
2bbb3412 C |
29 | private loadedPages: { [ id: number ]: boolean } = {} |
30 | ||
fd45e8f4 C |
31 | abstract getVideosObservable (): Observable<{ videos: Video[], totalVideos: number}> |
32 | ||
b2731bff C |
33 | get user () { |
34 | return this.authService.getUser() | |
35 | } | |
36 | ||
fd45e8f4 C |
37 | ngOnInit () { |
38 | // Subscribe to route changes | |
2bbb3412 C |
39 | const routeParams = this.route.snapshot.params |
40 | this.loadRouteParams(routeParams) | |
a2b817d3 | 41 | |
f3aaa9a9 | 42 | if (this.loadOnInit === true) this.loadMoreVideos('after') |
fd45e8f4 C |
43 | } |
44 | ||
2bbb3412 C |
45 | onNearOfTop () { |
46 | if (this.pagination.currentPage > 1) { | |
47 | this.previousPage() | |
48 | } | |
49 | } | |
50 | ||
51 | onNearOfBottom () { | |
52 | if (this.hasMoreVideos()) { | |
53 | this.nextPage() | |
54 | } | |
55 | } | |
56 | ||
f3aaa9a9 C |
57 | reloadVideos () { |
58 | this.videos = [] | |
59 | this.loadedPages = {} | |
60 | this.loadMoreVideos('before') | |
61 | } | |
62 | ||
2bbb3412 C |
63 | loadMoreVideos (where: 'before' | 'after') { |
64 | if (this.loadedPages[this.pagination.currentPage] === true) return | |
fd45e8f4 C |
65 | |
66 | const observable = this.getVideosObservable() | |
67 | ||
68 | observable.subscribe( | |
69 | ({ videos, totalVideos }) => { | |
a2b817d3 | 70 | // Paging is too high, return to the first one |
f595d394 | 71 | if (this.pagination.currentPage > 1 && totalVideos <= ((this.pagination.currentPage - 1) * this.pagination.itemsPerPage)) { |
a2b817d3 C |
72 | this.pagination.currentPage = 1 |
73 | this.setNewRouteParams() | |
74 | return this.reloadVideos() | |
75 | } | |
76 | ||
2bbb3412 | 77 | this.loadedPages[this.pagination.currentPage] = true |
fd45e8f4 | 78 | this.pagination.totalItems = totalVideos |
2bbb3412 C |
79 | |
80 | if (where === 'before') { | |
81 | this.videos = videos.concat(this.videos) | |
82 | } else { | |
83 | this.videos = this.videos.concat(videos) | |
84 | } | |
fd45e8f4 | 85 | }, |
c5911fd3 | 86 | error => this.notificationsService.error('Error', error.message) |
fd45e8f4 C |
87 | ) |
88 | } | |
89 | ||
2bbb3412 | 90 | protected hasMoreVideos () { |
f595d394 C |
91 | // No results |
92 | if (this.pagination.totalItems === 0) return false | |
93 | ||
94 | // Not loaded yet | |
2bbb3412 C |
95 | if (!this.pagination.totalItems) return true |
96 | ||
202f6b6c | 97 | const maxPage = this.pagination.totalItems / this.pagination.itemsPerPage |
2bbb3412 C |
98 | return maxPage > this.pagination.currentPage |
99 | } | |
100 | ||
101 | protected previousPage () { | |
102 | this.pagination.currentPage-- | |
103 | ||
104 | this.setNewRouteParams() | |
105 | this.loadMoreVideos('before') | |
106 | } | |
107 | ||
108 | protected nextPage () { | |
109 | this.pagination.currentPage++ | |
fd45e8f4 | 110 | |
2bbb3412 C |
111 | this.setNewRouteParams() |
112 | this.loadMoreVideos('after') | |
fd45e8f4 C |
113 | } |
114 | ||
fd45e8f4 C |
115 | protected buildRouteParams () { |
116 | // There is always a sort and a current page | |
117 | const params = { | |
118 | sort: this.sort, | |
119 | page: this.pagination.currentPage | |
120 | } | |
121 | ||
122 | return params | |
123 | } | |
124 | ||
125 | protected loadRouteParams (routeParams: { [ key: string ]: any }) { | |
f3aaa9a9 | 126 | this.sort = routeParams['sort'] as SortField || this.defaultSort |
fd45e8f4 C |
127 | |
128 | if (routeParams['page'] !== undefined) { | |
129 | this.pagination.currentPage = parseInt(routeParams['page'], 10) | |
130 | } else { | |
131 | this.pagination.currentPage = 1 | |
132 | } | |
133 | } | |
134 | ||
2bbb3412 | 135 | protected setNewRouteParams () { |
fd45e8f4 | 136 | const routeParams = this.buildRouteParams() |
2bbb3412 | 137 | this.router.navigate([ this.currentRoute, routeParams ]) |
fd45e8f4 C |
138 | } |
139 | } |