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 } from '@app/core'
   4 import { NotificationsService } from 'angular2-notifications'
   5 import { forkJoin, Subscription } from 'rxjs'
   6 import { SearchService } from '@app/search/search.service'
   7 import { ComponentPagination } from '@app/shared/rest/component-pagination.model'
   8 import { I18n } from '@ngx-translate/i18n-polyfill'
   9 import { MetaService } from '@ngx-meta/core'
  10 import { AdvancedSearch } from '@app/search/advanced-search.model'
  11 import { VideoChannel } from '@app/shared/video-channel/video-channel.model'
  12 import { immutableAssign } from '@app/shared/misc/utils'
  13 import { Video } from '@app/shared/video/video.model'
  14
  15 @Component({
  16   selector: 'my-search',
  17   styleUrls: [ './search.component.scss' ],
  18   templateUrl: './search.component.html'
  19 })
  20 export class SearchComponent implements OnInit, OnDestroy {
  21   results: (Video | VideoChannel)[] = []
  22
  23   pagination: ComponentPagination = {
  24     currentPage: 1,
  25     itemsPerPage: 10, // Only for videos, use another variable for channels
  26     totalItems: null
  27   }
  28   advancedSearch: AdvancedSearch = new AdvancedSearch()
  29   isSearchFilterCollapsed = true
  30   currentSearch: string
  31
  32   private subActivatedRoute: Subscription
  33   private isInitialLoad = false // set to false to show the search filters on first arrival
  34   private firstSearch = true
  35
  36   private channelsPerPage = 2
  37
  38   constructor (
  39     private i18n: I18n,
  40     private route: ActivatedRoute,
  41     private router: Router,
  42     private metaService: MetaService,
  43     private notificationsService: NotificationsService,
  44     private searchService: SearchService,
  45     private authService: AuthService
  46   ) { }
  47
  48   ngOnInit () {
  49     this.subActivatedRoute = this.route.queryParams.subscribe(
  50       queryParams => {
  51         const querySearch = queryParams['search']
  52
  53         // Search updated, reset filters
  54         if (this.currentSearch !== querySearch) {
  55           this.resetPagination()
  56           this.advancedSearch.reset()
  57
  58           this.currentSearch = querySearch || undefined
  59           this.updateTitle()
  60         }
  61
  62         this.advancedSearch = new AdvancedSearch(queryParams)
  63
  64         // Don't hide filters if we have some of them AND the user just came on the webpage
  65         this.isSearchFilterCollapsed = this.isInitialLoad === false || !this.advancedSearch.containsValues()
  66         this.isInitialLoad = false
  67
  68         this.search()
  69       },
  70
  71       err => this.notificationsService.error('Error', err.text)
  72     )
  73   }
  74
  75   ngOnDestroy () {
  76     if (this.subActivatedRoute) this.subActivatedRoute.unsubscribe()
  77   }
  78
  79   isVideoChannel (d: VideoChannel | Video): d is VideoChannel {
  80     return d instanceof VideoChannel
  81   }
  82
  83   isVideo (v: VideoChannel | Video): v is Video {
  84     return v instanceof Video
  85   }
  86
  87   isUserLoggedIn () {
  88     return this.authService.isLoggedIn()
  89   }
  90
  91   search () {
  92     forkJoin([
  93       this.searchService.searchVideos(this.currentSearch, this.pagination, this.advancedSearch),
  94       this.searchService.searchVideoChannels(this.currentSearch, immutableAssign(this.pagination, { itemsPerPage: this.channelsPerPage }))
  95     ])
  96       .subscribe(
  97         ([ videosResult, videoChannelsResult ]) => {
  98           this.results = this.results
  99                              .concat(videoChannelsResult.data)
 100                              .concat(videosResult.videos)
 101           this.pagination.totalItems = videosResult.totalVideos + videoChannelsResult.total
 102
 103           // Focus on channels if there are no enough videos
 104           if (this.firstSearch === true && videosResult.videos.length < this.pagination.itemsPerPage) {
 105             this.resetPagination()
 106             this.firstSearch = false
 107
 108             this.channelsPerPage = 10
 109             this.search()
 110           }
 111
 112           this.firstSearch = false
 113         },
 114
 115         error => {
 116           this.notificationsService.error(this.i18n('Error'), error.message)
 117         }
 118       )
 119
 120   }
 121
 122   onNearOfBottom () {
 123     // Last page
 124     if (this.pagination.totalItems <= (this.pagination.currentPage * this.pagination.itemsPerPage)) return
 125
 126     this.pagination.currentPage += 1
 127     this.search()
 128   }
 129
 130   onFiltered () {
 131     this.resetPagination()
 132
 133     this.updateUrlFromAdvancedSearch()
 134   }
 135
 136   numberOfFilters () {
 137     return this.advancedSearch.size()
 138   }
 139
 140   private resetPagination () {
 141     this.pagination.currentPage = 1
 142     this.pagination.totalItems = null
 143     this.channelsPerPage = 2
 144
 145     this.results = []
 146   }
 147
 148   private updateTitle () {
 149     this.metaService.setTitle(this.i18n('Search') + ' ' + this.currentSearch)
 150   }
 151
 152   private updateUrlFromAdvancedSearch () {
 153     const search = this.currentSearch || undefined
 154
 155     this.router.navigate([], {
 156       relativeTo: this.route,
 157       queryParams: Object.assign({}, this.advancedSearch.toUrlObject(), { search })
 158     })
 159   }
 160 }