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23db998f | 1 | import { Injectable } from '@angular/core' |
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2 | import { RecommendationService } from '@app/videos/recommendations/recommendations.service' |
3 | import { Video } from '@app/shared/video/video.model' | |
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4 | import { RecommendationInfo } from '@app/shared/video/recommendation-info.model' |
5 | import { VideoService } from '@app/shared/video/video.service' | |
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6 | import { map } from 'rxjs/operators' |
7 | import { Observable } from 'rxjs' | |
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8 | import { SearchService } from '@app/search/search.service' |
9 | import { AdvancedSearch } from '@app/search/advanced-search.model' | |
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10 | |
11 | /** | |
12 | * Provides "recommendations" by providing the most recently uploaded videos. | |
13 | */ | |
14 | @Injectable() | |
15 | export class RecentVideosRecommendationService implements RecommendationService { | |
16 | ||
17 | readonly pageSize = 5 | |
18 | ||
19 | constructor ( | |
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20 | private videos: VideoService, |
21 | private searchService: SearchService | |
23db998f | 22 | ) { } |
7f5f4152 | 23 | |
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24 | getRecommendations (recommendation: RecommendationInfo): Observable<Video[]> { |
25 | return this.fetchPage(1, recommendation) | |
7f5f4152 | 26 | .pipe( |
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27 | map(videos => { |
28 | const otherVideos = videos.filter(v => v.uuid !== recommendation.uuid) | |
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29 | return otherVideos.slice(0, this.pageSize) |
30 | }) | |
31 | ) | |
32 | } | |
33 | ||
b0c36821 | 34 | private fetchPage (page: number, recommendation: RecommendationInfo): Observable<Video[]> { |
7f5f4152 | 35 | let pagination = { currentPage: page, itemsPerPage: this.pageSize + 1 } |
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36 | if (!recommendation.tags) { |
37 | return this.videos.getVideos(pagination, '-createdAt') | |
38 | .pipe( | |
39 | map(v => v.videos) | |
40 | ) | |
41 | } | |
42 | if (recommendation.tags.length === 0) { | |
43 | return this.videos.getVideos(pagination, '-createdAt') | |
44 | .pipe( | |
45 | map(v => v.videos) | |
46 | ) | |
47 | } | |
48 | return this.searchService.searchVideos('', | |
49 | pagination, | |
50 | new AdvancedSearch({ tagsOneOf: recommendation.tags.join(','), sort: '-createdAt' }) | |
51 | ).pipe( | |
52 | map(v => v.videos) | |
53 | ) | |
7f5f4152 | 54 | } |
7f5f4152 | 55 | } |