client/src/app/search/search.component.ts

   1 import { Component, OnDestroy, OnInit } from '@angular/core'
   2 import { ActivatedRoute, Router } from '@angular/router'
   3 import { AuthService, Notifier } from '@app/core'
   4 import { forkJoin, Subscription } from 'rxjs'
   5 import { SearchService } from '@app/search/search.service'
   6 import { ComponentPagination } from '@app/shared/rest/component-pagination.model'
   7 import { I18n } from '@ngx-translate/i18n-polyfill'
   8 import { MetaService } from '@ngx-meta/core'
   9 import { AdvancedSearch } from '@app/search/advanced-search.model'
  10 import { VideoChannel } from '@app/shared/video-channel/video-channel.model'
  11 import { immutableAssign } from '@app/shared/misc/utils'
  12 import { Video } from '@app/shared/video/video.model'
  13
  14 @Component({
  15   selector: 'my-search',
  16   styleUrls: [ './search.component.scss' ],
  17   templateUrl: './search.component.html'
  18 })
  19 export class SearchComponent implements OnInit, OnDestroy {
  20   results: (Video | VideoChannel)[] = []
  21
  22   pagination: ComponentPagination = {
  23     currentPage: 1,
  24     itemsPerPage: 10, // Only for videos, use another variable for channels
  25     totalItems: null
  26   }
  27   advancedSearch: AdvancedSearch = new AdvancedSearch()
  28   isSearchFilterCollapsed = true
  29   currentSearch: string
  30
  31   private subActivatedRoute: Subscription
  32   private isInitialLoad = false // set to false to show the search filters on first arrival
  33   private firstSearch = true
  34
  35   private channelsPerPage = 2
  36
  37   constructor (
  38     private i18n: I18n,
  39     private route: ActivatedRoute,
  40     private router: Router,
  41     private metaService: MetaService,
  42     private notifier: Notifier,
  43     private searchService: SearchService,
  44     private authService: AuthService
  45   ) { }
  46
  47   ngOnInit () {
  48     this.subActivatedRoute = this.route.queryParams.subscribe(
  49       queryParams => {
  50         const querySearch = queryParams['search']
  51
  52         // Search updated, reset filters
  53         if (this.currentSearch !== querySearch) {
  54           this.resetPagination()
  55           this.advancedSearch.reset()
  56
  57           this.currentSearch = querySearch || undefined
  58           this.updateTitle()
  59         }
  60
  61         this.advancedSearch = new AdvancedSearch(queryParams)
  62
  63         // Don't hide filters if we have some of them AND the user just came on the webpage
  64         this.isSearchFilterCollapsed = this.isInitialLoad === false || !this.advancedSearch.containsValues()
  65         this.isInitialLoad = false
  66
  67         this.search()
  68       },
  69
  70       err => this.notifier.error(err.text)
  71     )
  72   }
  73
  74   ngOnDestroy () {
  75     if (this.subActivatedRoute) this.subActivatedRoute.unsubscribe()
  76   }
  77
  78   isVideoChannel (d: VideoChannel | Video): d is VideoChannel {
  79     return d instanceof VideoChannel
  80   }
  81
  82   isVideo (v: VideoChannel | Video): v is Video {
  83     return v instanceof Video
  84   }
  85
  86   isUserLoggedIn () {
  87     return this.authService.isLoggedIn()
  88   }
  89
  90   search () {
  91     forkJoin([
  92       this.searchService.searchVideos(this.currentSearch, this.pagination, this.advancedSearch),
  93       this.searchService.searchVideoChannels(this.currentSearch, immutableAssign(this.pagination, { itemsPerPage: this.channelsPerPage }))
  94     ])
  95       .subscribe(
  96         ([ videosResult, videoChannelsResult ]) => {
  97           this.results = this.results
  98                              .concat(videoChannelsResult.data)
  99                              .concat(videosResult.videos)
 100           this.pagination.totalItems = videosResult.totalVideos + videoChannelsResult.total
 101
 102           // Focus on channels if there are no enough videos
 103           if (this.firstSearch === true && videosResult.videos.length < this.pagination.itemsPerPage) {
 104             this.resetPagination()
 105             this.firstSearch = false
 106
 107             this.channelsPerPage = 10
 108             this.search()
 109           }
 110
 111           this.firstSearch = false
 112         },
 113
 114         err => this.notifier.error(err.message)
 115       )
 116
 117   }
 118
 119   onNearOfBottom () {
 120     // Last page
 121     if (this.pagination.totalItems <= (this.pagination.currentPage * this.pagination.itemsPerPage)) return
 122
 123     this.pagination.currentPage += 1
 124     this.search()
 125   }
 126
 127   onFiltered () {
 128     this.resetPagination()
 129
 130     this.updateUrlFromAdvancedSearch()
 131   }
 132
 133   numberOfFilters () {
 134     return this.advancedSearch.size()
 135   }
 136
 137   private resetPagination () {
 138     this.pagination.currentPage = 1
 139     this.pagination.totalItems = null
 140     this.channelsPerPage = 2
 141
 142     this.results = []
 143   }
 144
 145   private updateTitle () {
 146     const suffix = this.currentSearch ? ' ' + this.currentSearch : ''
 147     this.metaService.setTitle(this.i18n('Search') + suffix)
 148   }
 149
 150   private updateUrlFromAdvancedSearch () {
 151     const search = this.currentSearch || undefined
 152
 153     this.router.navigate([], {
 154       relativeTo: this.route,
 155       queryParams: Object.assign({}, this.advancedSearch.toUrlObject(), { search })
 156     })
 157   }
 158 }