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db400f44 | 1 | import { debounceTime } from 'rxjs/operators' |
9af61e84 | 2 | import { ElementRef, OnDestroy, OnInit, ViewChild } from '@angular/core' |
fd45e8f4 | 3 | import { ActivatedRoute, Router } from '@angular/router' |
2a2c19df | 4 | import { Location } from '@angular/common' |
0cd4344f | 5 | import { InfiniteScrollerDirective } from '@app/shared/video/infinite-scroller.directive' |
fd45e8f4 | 6 | import { NotificationsService } from 'angular2-notifications' |
db400f44 | 7 | import { fromEvent, Observable, Subscription } from 'rxjs' |
b2731bff | 8 | import { AuthService } from '../../core/auth' |
4635f59d | 9 | import { ComponentPagination } from '../rest/component-pagination.model' |
7b87d2d5 | 10 | import { VideoSortField } from './sort-field.type' |
202f6b6c | 11 | import { Video } from './video.model' |
b1d40cff | 12 | import { I18n } from '@ngx-translate/i18n-polyfill' |
bbe0f064 | 13 | import { ScreenService } from '@app/shared/misc/screen.service' |
22a16e36 | 14 | import { OwnerDisplayType } from '@app/shared/video/video-miniature.component' |
fd45e8f4 | 15 | |
9af61e84 | 16 | export abstract class AbstractVideoList implements OnInit, OnDestroy { |
75236b98 | 17 | private static LINES_PER_PAGE = 4 |
0cd4344f | 18 | |
1ff8d7d6 | 19 | @ViewChild('videosElement') videosElement: ElementRef |
0cd4344f C |
20 | @ViewChild(InfiniteScrollerDirective) infiniteScroller: InfiniteScrollerDirective |
21 | ||
4635f59d | 22 | pagination: ComponentPagination = { |
fd45e8f4 | 23 | currentPage: 1, |
0cd4344f | 24 | itemsPerPage: 10, |
fd45e8f4 C |
25 | totalItems: null |
26 | } | |
136cce4d | 27 | sort: VideoSortField = '-publishedAt' |
d59cba29 | 28 | categoryOneOf?: number |
136cce4d | 29 | defaultSort: VideoSortField = '-publishedAt' |
cc1561f9 | 30 | syndicationItems = [] |
244e76a5 | 31 | |
f3aaa9a9 | 32 | loadOnInit = true |
0626e7af | 33 | marginContent = true |
0cd4344f | 34 | pageHeight: number |
caae7a06 C |
35 | videoWidth: number |
36 | videoHeight: number | |
37 | videoPages: Video[][] = [] | |
22a16e36 | 38 | ownerDisplayType: OwnerDisplayType = 'account' |
d5931e62 | 39 | firstLoadedPage: number |
fd45e8f4 | 40 | |
9af61e84 | 41 | protected baseVideoWidth = 215 |
a8ecc6f6 | 42 | protected baseVideoHeight = 205 |
9af61e84 | 43 | |
b2731bff C |
44 | protected abstract notificationsService: NotificationsService |
45 | protected abstract authService: AuthService | |
46 | protected abstract router: Router | |
47 | protected abstract route: ActivatedRoute | |
bbe0f064 | 48 | protected abstract screenService: ScreenService |
b1d40cff | 49 | protected abstract i18n: I18n |
2a2c19df | 50 | protected abstract location: Location |
2bbb3412 | 51 | protected abstract currentRoute: string |
9bf9d2a5 | 52 | abstract titlePage: string |
c88593f7 | 53 | |
0cd4344f | 54 | protected loadedPages: { [ id: number ]: Video[] } = {} |
5f73f5da | 55 | protected loadingPage: { [ id: number ]: boolean } = {} |
0cd4344f | 56 | protected otherRouteParams = {} |
2bbb3412 | 57 | |
9af61e84 C |
58 | private resizeSubscription: Subscription |
59 | ||
0cd4344f | 60 | abstract getVideosObservable (page: number): Observable<{ videos: Video[], totalVideos: number}> |
244e76a5 | 61 | abstract generateSyndicationList () |
fd45e8f4 | 62 | |
b2731bff C |
63 | get user () { |
64 | return this.authService.getUser() | |
65 | } | |
66 | ||
fd45e8f4 C |
67 | ngOnInit () { |
68 | // Subscribe to route changes | |
5b5e333f | 69 | const routeParams = this.route.snapshot.queryParams |
2bbb3412 | 70 | this.loadRouteParams(routeParams) |
a2b817d3 | 71 | |
9af61e84 | 72 | this.resizeSubscription = fromEvent(window, 'resize') |
db400f44 | 73 | .pipe(debounceTime(500)) |
6194c1b4 | 74 | .subscribe(() => this.calcPageSizes()) |
3290f37c | 75 | |
6194c1b4 | 76 | this.calcPageSizes() |
0cd4344f | 77 | if (this.loadOnInit === true) this.loadMoreVideos(this.pagination.currentPage) |
fd45e8f4 C |
78 | } |
79 | ||
9af61e84 C |
80 | ngOnDestroy () { |
81 | if (this.resizeSubscription) this.resizeSubscription.unsubscribe() | |
82 | } | |
83 | ||
89724816 C |
84 | pageByVideoId (index: number, page: Video[]) { |
85 | // Video are unique in all pages | |
86 | return page[0].id | |
87 | } | |
88 | ||
89 | videoById (index: number, video: Video) { | |
90 | return video.id | |
91 | } | |
92 | ||
2bbb3412 | 93 | onNearOfTop () { |
0cd4344f | 94 | this.previousPage() |
2bbb3412 C |
95 | } |
96 | ||
97 | onNearOfBottom () { | |
98 | if (this.hasMoreVideos()) { | |
99 | this.nextPage() | |
100 | } | |
101 | } | |
102 | ||
0cd4344f C |
103 | onPageChanged (page: number) { |
104 | this.pagination.currentPage = page | |
105 | this.setNewRouteParams() | |
106 | } | |
107 | ||
f3aaa9a9 | 108 | reloadVideos () { |
f3aaa9a9 | 109 | this.loadedPages = {} |
0cd4344f | 110 | this.loadMoreVideos(this.pagination.currentPage) |
f3aaa9a9 C |
111 | } |
112 | ||
a8ecc6f6 C |
113 | loadMoreVideos (page: number, loadOnTop = false) { |
114 | this.adjustVideoPageHeight() | |
115 | ||
116 | const currentY = window.scrollY | |
117 | ||
0cd4344f | 118 | if (this.loadedPages[page] !== undefined) return |
5f73f5da | 119 | if (this.loadingPage[page] === true) return |
fd45e8f4 | 120 | |
5f73f5da | 121 | this.loadingPage[page] = true |
0cd4344f | 122 | const observable = this.getVideosObservable(page) |
fd45e8f4 C |
123 | |
124 | observable.subscribe( | |
125 | ({ videos, totalVideos }) => { | |
5f73f5da C |
126 | this.loadingPage[page] = false |
127 | ||
a8ecc6f6 C |
128 | if (this.firstLoadedPage === undefined || this.firstLoadedPage > page) this.firstLoadedPage = page |
129 | ||
a2b817d3 | 130 | // Paging is too high, return to the first one |
f595d394 | 131 | if (this.pagination.currentPage > 1 && totalVideos <= ((this.pagination.currentPage - 1) * this.pagination.itemsPerPage)) { |
a2b817d3 C |
132 | this.pagination.currentPage = 1 |
133 | this.setNewRouteParams() | |
134 | return this.reloadVideos() | |
135 | } | |
136 | ||
0cd4344f C |
137 | this.loadedPages[page] = videos |
138 | this.buildVideoPages() | |
fd45e8f4 | 139 | this.pagination.totalItems = totalVideos |
2bbb3412 | 140 | |
0cd4344f C |
141 | // Initialize infinite scroller now we loaded the first page |
142 | if (Object.keys(this.loadedPages).length === 1) { | |
143 | // Wait elements creation | |
a8ecc6f6 C |
144 | setTimeout(() => { |
145 | this.infiniteScroller.initialize() | |
146 | ||
147 | // At our first load, we did not load the first page | |
148 | // Load the previous page so the user can move on the top (and browser previous pages) | |
149 | if (this.pagination.currentPage > 1) this.loadMoreVideos(this.pagination.currentPage - 1, true) | |
150 | }, 500) | |
2bbb3412 | 151 | } |
a8ecc6f6 C |
152 | |
153 | // Insert elements on the top but keep the scroll in the previous position | |
154 | if (loadOnTop) setTimeout(() => { window.scrollTo(0, currentY + this.pageHeight) }, 0) | |
fd45e8f4 | 155 | }, |
5f73f5da C |
156 | error => { |
157 | this.loadingPage[page] = false | |
b1d40cff | 158 | this.notificationsService.error(this.i18n('Error'), error.message) |
5f73f5da | 159 | } |
fd45e8f4 C |
160 | ) |
161 | } | |
162 | ||
2bbb3412 | 163 | protected hasMoreVideos () { |
f595d394 C |
164 | // No results |
165 | if (this.pagination.totalItems === 0) return false | |
166 | ||
167 | // Not loaded yet | |
2bbb3412 C |
168 | if (!this.pagination.totalItems) return true |
169 | ||
202f6b6c | 170 | const maxPage = this.pagination.totalItems / this.pagination.itemsPerPage |
6a6d92b1 | 171 | return maxPage > this.maxPageLoaded() |
2bbb3412 C |
172 | } |
173 | ||
174 | protected previousPage () { | |
0cd4344f | 175 | const min = this.minPageLoaded() |
2bbb3412 | 176 | |
0cd4344f | 177 | if (min > 1) { |
89724816 | 178 | this.loadMoreVideos(min - 1, true) |
0cd4344f | 179 | } |
2bbb3412 C |
180 | } |
181 | ||
182 | protected nextPage () { | |
0cd4344f | 183 | this.loadMoreVideos(this.maxPageLoaded() + 1) |
fd45e8f4 C |
184 | } |
185 | ||
fd45e8f4 C |
186 | protected buildRouteParams () { |
187 | // There is always a sort and a current page | |
188 | const params = { | |
189 | sort: this.sort, | |
190 | page: this.pagination.currentPage | |
191 | } | |
192 | ||
0cd4344f | 193 | return Object.assign(params, this.otherRouteParams) |
fd45e8f4 C |
194 | } |
195 | ||
196 | protected loadRouteParams (routeParams: { [ key: string ]: any }) { | |
7b87d2d5 | 197 | this.sort = routeParams['sort'] as VideoSortField || this.defaultSort |
d59cba29 | 198 | this.categoryOneOf = routeParams['categoryOneOf'] |
fd45e8f4 C |
199 | if (routeParams['page'] !== undefined) { |
200 | this.pagination.currentPage = parseInt(routeParams['page'], 10) | |
201 | } else { | |
202 | this.pagination.currentPage = 1 | |
203 | } | |
204 | } | |
205 | ||
2bbb3412 | 206 | protected setNewRouteParams () { |
2a2c19df C |
207 | const paramsObject = this.buildRouteParams() |
208 | ||
209 | const queryParams = Object.keys(paramsObject).map(p => p + '=' + paramsObject[p]).join('&') | |
210 | this.location.replaceState(this.currentRoute, queryParams) | |
fd45e8f4 | 211 | } |
0cd4344f C |
212 | |
213 | protected buildVideoPages () { | |
214 | this.videoPages = Object.values(this.loadedPages) | |
215 | } | |
216 | ||
a8ecc6f6 C |
217 | protected adjustVideoPageHeight () { |
218 | const numberOfPagesLoaded = Object.keys(this.loadedPages).length | |
219 | if (!numberOfPagesLoaded) return | |
220 | ||
221 | this.pageHeight = this.videosElement.nativeElement.offsetHeight / numberOfPagesLoaded | |
222 | } | |
223 | ||
a86887a4 C |
224 | protected buildVideoHeight () { |
225 | // Same ratios than base width/height | |
226 | return this.videosElement.nativeElement.offsetWidth * (this.baseVideoHeight / this.baseVideoWidth) | |
227 | } | |
228 | ||
0cd4344f C |
229 | private minPageLoaded () { |
230 | return Math.min(...Object.keys(this.loadedPages).map(e => parseInt(e, 10))) | |
231 | } | |
232 | ||
233 | private maxPageLoaded () { | |
234 | return Math.max(...Object.keys(this.loadedPages).map(e => parseInt(e, 10))) | |
235 | } | |
6194c1b4 C |
236 | |
237 | private calcPageSizes () { | |
bbe0f064 | 238 | if (this.screenService.isInMobileView() || this.baseVideoWidth === -1) { |
6194c1b4 C |
239 | this.pagination.itemsPerPage = 5 |
240 | ||
241 | // Video takes all the width | |
242 | this.videoWidth = -1 | |
a86887a4 | 243 | this.videoHeight = this.buildVideoHeight() |
6194c1b4 C |
244 | this.pageHeight = this.pagination.itemsPerPage * this.videoHeight |
245 | } else { | |
9af61e84 C |
246 | this.videoWidth = this.baseVideoWidth |
247 | this.videoHeight = this.baseVideoHeight | |
caae7a06 | 248 | |
6194c1b4 C |
249 | const videosWidth = this.videosElement.nativeElement.offsetWidth |
250 | this.pagination.itemsPerPage = Math.floor(videosWidth / this.videoWidth) * AbstractVideoList.LINES_PER_PAGE | |
251 | this.pageHeight = this.videoHeight * AbstractVideoList.LINES_PER_PAGE | |
252 | } | |
253 | ||
254 | // Rebuild pages because maybe we modified the number of items per page | |
caae7a06 | 255 | const videos = [].concat(...this.videoPages) |
6194c1b4 C |
256 | this.loadedPages = {} |
257 | ||
caae7a06 C |
258 | let i = 1 |
259 | // Don't include the last page if it not complete | |
260 | while (videos.length >= this.pagination.itemsPerPage && i < 10000) { // 10000 -> Hard limit in case of infinite loop | |
261 | this.loadedPages[i] = videos.splice(0, this.pagination.itemsPerPage) | |
262 | i++ | |
6194c1b4 C |
263 | } |
264 | ||
9af61e84 C |
265 | // Re fetch the last page |
266 | if (videos.length !== 0) { | |
267 | this.loadMoreVideos(i) | |
268 | } else { | |
269 | this.buildVideoPages() | |
270 | } | |
6194c1b4 | 271 | |
caae7a06 | 272 | console.log('Rebuilt pages with %s elements per page.', this.pagination.itemsPerPage) |
6194c1b4 | 273 | } |
fd45e8f4 | 274 | } |