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 = 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 redirectService: RedirectService,
  44     private notificationsService: NotificationsService,
  45     private searchService: SearchService,
  46     private authService: AuthService
  47   ) { }
  48
  49   ngOnInit () {
  50     this.subActivatedRoute = this.route.queryParams.subscribe(
  51       queryParams => {
  52         const querySearch = queryParams['search']
  53
  54         // New empty search
  55         if (this.currentSearch && !querySearch) return this.redirectService.redirectToHomepage()
  56
  57         // Search updated, reset filters
  58         if (this.currentSearch !== querySearch) {
  59           this.resetPagination()
  60           this.advancedSearch.reset()
  61
  62           this.currentSearch = querySearch
  63           this.updateTitle()
  64         }
  65
  66         this.advancedSearch = new AdvancedSearch(queryParams)
  67
  68         // Don't hide filters if we have some of them AND the user just came on the webpage
  69         this.isSearchFilterCollapsed = this.isInitialLoad === false || !this.advancedSearch.containsValues()
  70         this.isInitialLoad = false
  71
  72         this.search()
  73       },
  74
  75       err => this.notificationsService.error('Error', err.text)
  76     )
  77   }
  78
  79   ngOnDestroy () {
  80     if (this.subActivatedRoute) this.subActivatedRoute.unsubscribe()
  81   }
  82
  83   isVideoChannel (d: VideoChannel | Video): d is VideoChannel {
  84     return d instanceof VideoChannel
  85   }
  86
  87   isVideo (v: VideoChannel | Video): v is Video {
  88     return v instanceof Video
  89   }
  90
  91   isUserLoggedIn () {
  92     return this.authService.isLoggedIn()
  93   }
  94
  95   search () {
  96     forkJoin([
  97       this.searchService.searchVideos(this.currentSearch, this.pagination, this.advancedSearch),
  98       this.searchService.searchVideoChannels(this.currentSearch, immutableAssign(this.pagination, { itemsPerPage: this.channelsPerPage }))
  99     ])
 100       .subscribe(
 101         ([ videosResult, videoChannelsResult ]) => {
 102           this.results = this.results
 103                              .concat(videoChannelsResult.data)
 104                              .concat(videosResult.videos)
 105           this.pagination.totalItems = videosResult.totalVideos + videoChannelsResult.total
 106
 107           // Focus on channels if there are no enough videos
 108           if (this.firstSearch === true && videosResult.videos.length < this.pagination.itemsPerPage) {
 109             this.resetPagination()
 110             this.firstSearch = false
 111
 112             this.channelsPerPage = 10
 113             this.search()
 114           }
 115
 116           this.firstSearch = false
 117         },
 118
 119         error => {
 120           this.notificationsService.error(this.i18n('Error'), error.message)
 121         }
 122       )
 123
 124   }
 125
 126   onNearOfBottom () {
 127     // Last page
 128     if (this.pagination.totalItems <= (this.pagination.currentPage * this.pagination.itemsPerPage)) return
 129
 130     this.pagination.currentPage += 1
 131     this.search()
 132   }
 133
 134   onFiltered () {
 135     this.resetPagination()
 136
 137     this.updateUrlFromAdvancedSearch()
 138   }
 139
 140   numberOfFilters () {
 141     return this.advancedSearch.size()
 142   }
 143
 144   private resetPagination () {
 145     this.pagination.currentPage = 1
 146     this.pagination.totalItems = null
 147     this.channelsPerPage = 2
 148
 149     this.results = []
 150   }
 151
 152   private updateTitle () {
 153     this.metaService.setTitle(this.i18n('Search') + ' ' + this.currentSearch)
 154   }
 155
 156   private updateUrlFromAdvancedSearch () {
 157     const search = (this.currentSearch && this.currentSearch !== '') ? this.currentSearch : undefined
 158
 159     this.router.navigate([], {
 160       relativeTo: this.route,
 161       queryParams: Object.assign({}, this.advancedSearch.toUrlObject(), { search })
 162     })
 163   }
 164 }