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9af61e84 | 1 | import { ElementRef, OnDestroy, OnInit, ViewChild } from '@angular/core' |
fd45e8f4 | 2 | import { ActivatedRoute, Router } from '@angular/router' |
0cd4344f C |
3 | import { isInMobileView } from '@app/shared/misc/utils' |
4 | import { InfiniteScrollerDirective } from '@app/shared/video/infinite-scroller.directive' | |
fd45e8f4 | 5 | import { NotificationsService } from 'angular2-notifications' |
caae7a06 | 6 | import 'rxjs/add/operator/debounceTime' |
9bf9d2a5 | 7 | import { Observable } from 'rxjs/Observable' |
6194c1b4 | 8 | import { fromEvent } from 'rxjs/observable/fromEvent' |
9af61e84 | 9 | import { Subscription } from 'rxjs/Subscription' |
b2731bff | 10 | import { AuthService } from '../../core/auth' |
4635f59d | 11 | import { ComponentPagination } from '../rest/component-pagination.model' |
7b87d2d5 | 12 | import { VideoSortField } from './sort-field.type' |
202f6b6c | 13 | import { Video } from './video.model' |
fd45e8f4 | 14 | |
9af61e84 | 15 | export abstract class AbstractVideoList implements OnInit, OnDestroy { |
75236b98 | 16 | private static LINES_PER_PAGE = 4 |
0cd4344f | 17 | |
1ff8d7d6 | 18 | @ViewChild('videosElement') videosElement: ElementRef |
0cd4344f C |
19 | @ViewChild(InfiniteScrollerDirective) infiniteScroller: InfiniteScrollerDirective |
20 | ||
4635f59d | 21 | pagination: ComponentPagination = { |
fd45e8f4 | 22 | currentPage: 1, |
0cd4344f | 23 | itemsPerPage: 10, |
fd45e8f4 C |
24 | totalItems: null |
25 | } | |
7b87d2d5 C |
26 | sort: VideoSortField = '-createdAt' |
27 | defaultSort: VideoSortField = '-createdAt' | |
cc1561f9 | 28 | syndicationItems = [] |
244e76a5 | 29 | |
f3aaa9a9 | 30 | loadOnInit = true |
0cd4344f | 31 | pageHeight: number |
caae7a06 C |
32 | videoWidth: number |
33 | videoHeight: number | |
34 | videoPages: Video[][] = [] | |
fd45e8f4 | 35 | |
9af61e84 C |
36 | protected baseVideoWidth = 215 |
37 | protected baseVideoHeight = 230 | |
38 | ||
b2731bff C |
39 | protected abstract notificationsService: NotificationsService |
40 | protected abstract authService: AuthService | |
41 | protected abstract router: Router | |
42 | protected abstract route: ActivatedRoute | |
2bbb3412 | 43 | protected abstract currentRoute: string |
9bf9d2a5 | 44 | abstract titlePage: string |
c88593f7 | 45 | |
0cd4344f C |
46 | protected loadedPages: { [ id: number ]: Video[] } = {} |
47 | protected otherRouteParams = {} | |
2bbb3412 | 48 | |
9af61e84 C |
49 | private resizeSubscription: Subscription |
50 | ||
0cd4344f | 51 | abstract getVideosObservable (page: number): Observable<{ videos: Video[], totalVideos: number}> |
244e76a5 | 52 | abstract generateSyndicationList () |
fd45e8f4 | 53 | |
b2731bff C |
54 | get user () { |
55 | return this.authService.getUser() | |
56 | } | |
57 | ||
fd45e8f4 C |
58 | ngOnInit () { |
59 | // Subscribe to route changes | |
5b5e333f | 60 | const routeParams = this.route.snapshot.queryParams |
2bbb3412 | 61 | this.loadRouteParams(routeParams) |
a2b817d3 | 62 | |
9af61e84 | 63 | this.resizeSubscription = fromEvent(window, 'resize') |
6194c1b4 C |
64 | .debounceTime(500) |
65 | .subscribe(() => this.calcPageSizes()) | |
3290f37c | 66 | |
6194c1b4 | 67 | this.calcPageSizes() |
0cd4344f | 68 | if (this.loadOnInit === true) this.loadMoreVideos(this.pagination.currentPage) |
fd45e8f4 C |
69 | } |
70 | ||
9af61e84 C |
71 | ngOnDestroy () { |
72 | if (this.resizeSubscription) this.resizeSubscription.unsubscribe() | |
73 | } | |
74 | ||
2bbb3412 | 75 | onNearOfTop () { |
0cd4344f | 76 | this.previousPage() |
2bbb3412 C |
77 | } |
78 | ||
79 | onNearOfBottom () { | |
80 | if (this.hasMoreVideos()) { | |
81 | this.nextPage() | |
82 | } | |
83 | } | |
84 | ||
0cd4344f C |
85 | onPageChanged (page: number) { |
86 | this.pagination.currentPage = page | |
87 | this.setNewRouteParams() | |
88 | } | |
89 | ||
f3aaa9a9 | 90 | reloadVideos () { |
f3aaa9a9 | 91 | this.loadedPages = {} |
0cd4344f | 92 | this.loadMoreVideos(this.pagination.currentPage) |
f3aaa9a9 C |
93 | } |
94 | ||
0cd4344f C |
95 | loadMoreVideos (page: number) { |
96 | if (this.loadedPages[page] !== undefined) return | |
fd45e8f4 | 97 | |
0cd4344f | 98 | const observable = this.getVideosObservable(page) |
fd45e8f4 C |
99 | |
100 | observable.subscribe( | |
101 | ({ videos, totalVideos }) => { | |
a2b817d3 | 102 | // Paging is too high, return to the first one |
f595d394 | 103 | if (this.pagination.currentPage > 1 && totalVideos <= ((this.pagination.currentPage - 1) * this.pagination.itemsPerPage)) { |
a2b817d3 C |
104 | this.pagination.currentPage = 1 |
105 | this.setNewRouteParams() | |
106 | return this.reloadVideos() | |
107 | } | |
108 | ||
0cd4344f C |
109 | this.loadedPages[page] = videos |
110 | this.buildVideoPages() | |
fd45e8f4 | 111 | this.pagination.totalItems = totalVideos |
2bbb3412 | 112 | |
0cd4344f C |
113 | // Initialize infinite scroller now we loaded the first page |
114 | if (Object.keys(this.loadedPages).length === 1) { | |
115 | // Wait elements creation | |
116 | setTimeout(() => this.infiniteScroller.initialize(), 500) | |
2bbb3412 | 117 | } |
fd45e8f4 | 118 | }, |
c5911fd3 | 119 | error => this.notificationsService.error('Error', error.message) |
fd45e8f4 C |
120 | ) |
121 | } | |
122 | ||
2bbb3412 | 123 | protected hasMoreVideos () { |
f595d394 C |
124 | // No results |
125 | if (this.pagination.totalItems === 0) return false | |
126 | ||
127 | // Not loaded yet | |
2bbb3412 C |
128 | if (!this.pagination.totalItems) return true |
129 | ||
202f6b6c | 130 | const maxPage = this.pagination.totalItems / this.pagination.itemsPerPage |
6a6d92b1 | 131 | return maxPage > this.maxPageLoaded() |
2bbb3412 C |
132 | } |
133 | ||
134 | protected previousPage () { | |
0cd4344f | 135 | const min = this.minPageLoaded() |
2bbb3412 | 136 | |
0cd4344f C |
137 | if (min > 1) { |
138 | this.loadMoreVideos(min - 1) | |
139 | } | |
2bbb3412 C |
140 | } |
141 | ||
142 | protected nextPage () { | |
0cd4344f | 143 | this.loadMoreVideos(this.maxPageLoaded() + 1) |
fd45e8f4 C |
144 | } |
145 | ||
fd45e8f4 C |
146 | protected buildRouteParams () { |
147 | // There is always a sort and a current page | |
148 | const params = { | |
149 | sort: this.sort, | |
150 | page: this.pagination.currentPage | |
151 | } | |
152 | ||
0cd4344f | 153 | return Object.assign(params, this.otherRouteParams) |
fd45e8f4 C |
154 | } |
155 | ||
156 | protected loadRouteParams (routeParams: { [ key: string ]: any }) { | |
7b87d2d5 | 157 | this.sort = routeParams['sort'] as VideoSortField || this.defaultSort |
fd45e8f4 C |
158 | |
159 | if (routeParams['page'] !== undefined) { | |
160 | this.pagination.currentPage = parseInt(routeParams['page'], 10) | |
161 | } else { | |
162 | this.pagination.currentPage = 1 | |
163 | } | |
164 | } | |
165 | ||
2bbb3412 | 166 | protected setNewRouteParams () { |
fd45e8f4 | 167 | const routeParams = this.buildRouteParams() |
2e78e268 | 168 | this.router.navigate([ this.currentRoute ], { queryParams: routeParams }) |
fd45e8f4 | 169 | } |
0cd4344f C |
170 | |
171 | protected buildVideoPages () { | |
172 | this.videoPages = Object.values(this.loadedPages) | |
173 | } | |
174 | ||
a86887a4 C |
175 | protected buildVideoHeight () { |
176 | // Same ratios than base width/height | |
177 | return this.videosElement.nativeElement.offsetWidth * (this.baseVideoHeight / this.baseVideoWidth) | |
178 | } | |
179 | ||
0cd4344f C |
180 | private minPageLoaded () { |
181 | return Math.min(...Object.keys(this.loadedPages).map(e => parseInt(e, 10))) | |
182 | } | |
183 | ||
184 | private maxPageLoaded () { | |
185 | return Math.max(...Object.keys(this.loadedPages).map(e => parseInt(e, 10))) | |
186 | } | |
6194c1b4 C |
187 | |
188 | private calcPageSizes () { | |
9af61e84 | 189 | if (isInMobileView() || this.baseVideoWidth === -1) { |
6194c1b4 C |
190 | this.pagination.itemsPerPage = 5 |
191 | ||
192 | // Video takes all the width | |
193 | this.videoWidth = -1 | |
a86887a4 | 194 | this.videoHeight = this.buildVideoHeight() |
6194c1b4 C |
195 | this.pageHeight = this.pagination.itemsPerPage * this.videoHeight |
196 | } else { | |
9af61e84 C |
197 | this.videoWidth = this.baseVideoWidth |
198 | this.videoHeight = this.baseVideoHeight | |
caae7a06 | 199 | |
6194c1b4 C |
200 | const videosWidth = this.videosElement.nativeElement.offsetWidth |
201 | this.pagination.itemsPerPage = Math.floor(videosWidth / this.videoWidth) * AbstractVideoList.LINES_PER_PAGE | |
202 | this.pageHeight = this.videoHeight * AbstractVideoList.LINES_PER_PAGE | |
203 | } | |
204 | ||
205 | // Rebuild pages because maybe we modified the number of items per page | |
caae7a06 | 206 | const videos = [].concat(...this.videoPages) |
6194c1b4 C |
207 | this.loadedPages = {} |
208 | ||
caae7a06 C |
209 | let i = 1 |
210 | // Don't include the last page if it not complete | |
211 | while (videos.length >= this.pagination.itemsPerPage && i < 10000) { // 10000 -> Hard limit in case of infinite loop | |
212 | this.loadedPages[i] = videos.splice(0, this.pagination.itemsPerPage) | |
213 | i++ | |
6194c1b4 C |
214 | } |
215 | ||
9af61e84 C |
216 | // Re fetch the last page |
217 | if (videos.length !== 0) { | |
218 | this.loadMoreVideos(i) | |
219 | } else { | |
220 | this.buildVideoPages() | |
221 | } | |
6194c1b4 | 222 | |
caae7a06 | 223 | console.log('Rebuilt pages with %s elements per page.', this.pagination.itemsPerPage) |
6194c1b4 | 224 | } |
fd45e8f4 | 225 | } |