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, RedirectService } 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 = 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 redirectService: RedirectService,
  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         // New empty search
  54         if (this.currentSearch && !querySearch) return this.redirectService.redirectToHomepage()
  55
  56         // Search updated, reset filters
  57         if (this.currentSearch !== querySearch) {
  58           this.resetPagination()
  59           this.advancedSearch.reset()
  60
  61           this.currentSearch = querySearch
  62           this.updateTitle()
  63         }
  64
  65         this.advancedSearch = new AdvancedSearch(queryParams)
  66
  67         // Don't hide filters if we have some of them AND the user just came on the webpage
  68         this.isSearchFilterCollapsed = this.isInitialLoad === false || !this.advancedSearch.containsValues()
  69         this.isInitialLoad = false
  70
  71         this.search()
  72       },
  73
  74       err => this.notificationsService.error('Error', err.text)
  75     )
  76   }
  77
  78   ngOnDestroy () {
  79     if (this.subActivatedRoute) this.subActivatedRoute.unsubscribe()
  80   }
  81
  82   isVideoChannel (d: VideoChannel | Video): d is VideoChannel {
  83     return d instanceof VideoChannel
  84   }
  85
  86   isVideo (v: VideoChannel | Video): v is Video {
  87     return v instanceof Video
  88   }
  89
  90   isUserLoggedIn () {
  91     return this.authService.isLoggedIn()
  92   }
  93
  94   search () {
  95     forkJoin([
  96       this.searchService.searchVideos(this.currentSearch, this.pagination, this.advancedSearch),
  97       this.searchService.searchVideoChannels(this.currentSearch, immutableAssign(this.pagination, { itemsPerPage: this.channelsPerPage }))
  98     ])
  99       .subscribe(
 100         ([ videosResult, videoChannelsResult ]) => {
 101           this.results = this.results
 102                              .concat(videoChannelsResult.data)
 103                              .concat(videosResult.videos)
 104           this.pagination.totalItems = videosResult.totalVideos + videoChannelsResult.total
 105
 106           // Focus on channels
 107           if (this.channelsPerPage !== 10 && videosResult.videos.length < this.pagination.itemsPerPage) {
 108             this.resetPagination()
 109
 110             this.channelsPerPage = 10
 111             this.search()
 112           }
 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   private resetPagination () {
 137     this.pagination.currentPage = 1
 138     this.pagination.totalItems = null
 139     this.channelsPerPage = 2
 140
 141     this.results = []
 142   }
 143
 144   private updateTitle () {
 145     this.metaService.setTitle(this.i18n('Search') + ' ' + this.currentSearch)
 146   }
 147
 148   private updateUrlFromAdvancedSearch () {
 149     this.router.navigate([], {
 150       relativeTo: this.route,
 151       queryParams: Object.assign({}, this.advancedSearch.toUrlObject(), { search: this.currentSearch })
 152     })
 153   }
 154 }