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1 | import { Observable, of } from 'rxjs' | |
2 | import { map, switchMap } from 'rxjs/operators' | |
3 | import { Injectable } from '@angular/core' | |
4 | import { ServerService, UserService } from '@app/core' | |
5 | import { Video, VideoService } from '@app/shared/shared-main' | |
6 | import { AdvancedSearch, SearchService } from '@app/shared/shared-search' | |
7 | import { HTMLServerConfig } from '@shared/models' | |
8 | import { RecommendationInfo } from './recommendation-info.model' | |
9 | import { RecommendationService } from './recommendations.service' | |
10 | ||
11 | /** | |
12 | * Provides "recommendations" by providing the most recently uploaded videos. | |
13 | */ | |
14 | @Injectable() | |
15 | export class RecentVideosRecommendationService implements RecommendationService { | |
16 | readonly pageSize = 5 | |
17 | ||
18 | private config: HTMLServerConfig | |
19 | ||
20 | constructor ( | |
21 | private videos: VideoService, | |
22 | private searchService: SearchService, | |
23 | private userService: UserService, | |
24 | private serverService: ServerService | |
25 | ) { | |
26 | this.config = this.serverService.getHTMLConfig() | |
27 | } | |
28 | ||
29 | getRecommendations (recommendation: RecommendationInfo): Observable<Video[]> { | |
30 | ||
31 | return this.fetchPage(1, recommendation) | |
32 | .pipe( | |
33 | map(videos => { | |
34 | const otherVideos = videos.filter(v => v.uuid !== recommendation.uuid) | |
35 | return otherVideos.slice(0, this.pageSize) | |
36 | }) | |
37 | ) | |
38 | } | |
39 | ||
40 | private fetchPage (page: number, recommendation: RecommendationInfo): Observable<Video[]> { | |
41 | const pagination = { currentPage: page, itemsPerPage: this.pageSize + 1 } | |
42 | const defaultSubscription = this.videos.getVideos({ videoPagination: pagination, sort: '-createdAt' }) | |
43 | .pipe(map(v => v.data)) | |
44 | ||
45 | const tags = recommendation.tags | |
46 | const searchIndexConfig = this.config.search.searchIndex | |
47 | if ( | |
48 | !tags || tags.length === 0 || | |
49 | (searchIndexConfig.enabled === true && searchIndexConfig.disableLocalSearch === true) | |
50 | ) { | |
51 | return defaultSubscription | |
52 | } | |
53 | ||
54 | return this.userService.getAnonymousOrLoggedUser() | |
55 | .pipe( | |
56 | map(user => { | |
57 | return { | |
58 | search: '', | |
59 | componentPagination: pagination, | |
60 | advancedSearch: new AdvancedSearch({ | |
61 | tagsOneOf: recommendation.tags.join(','), | |
62 | sort: '-publishedAt', | |
63 | searchTarget: 'local', | |
64 | nsfw: user.nsfwPolicy | |
65 | ? this.videos.nsfwPolicyToParam(user.nsfwPolicy) | |
66 | : undefined | |
67 | }) | |
68 | } | |
69 | }), | |
70 | switchMap(params => this.searchService.searchVideos(params)), | |
71 | map(v => v.data), | |
72 | switchMap(videos => { | |
73 | if (videos.length <= 1) return defaultSubscription | |
74 | ||
75 | return of(videos) | |
76 | }) | |
77 | ) | |
78 | } | |
79 | } |