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   get user () {
  48     return this.authService.getUser()
  49   }
  50
  51   ngOnInit () {
  52     this.subActivatedRoute = this.route.queryParams.subscribe(
  53       queryParams => {
  54         const querySearch = queryParams['search']
  55
  56         // Search updated, reset filters
  57         if (this.currentSearch !== querySearch) {
  58           this.resetPagination()
  59           this.advancedSearch.reset()
  60
  61           this.currentSearch = querySearch || undefined
  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.notifier.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 if there are no enough videos
 107           if (this.firstSearch === true && videosResult.videos.length < this.pagination.itemsPerPage) {
 108             this.resetPagination()
 109             this.firstSearch = false
 110
 111             this.channelsPerPage = 10
 112             this.search()
 113           }
 114
 115           this.firstSearch = false
 116         },
 117
 118         err => this.notifier.error(err.message)
 119       )
 120
 121   }
 122
 123   onNearOfBottom () {
 124     // Last page
 125     if (this.pagination.totalItems <= (this.pagination.currentPage * this.pagination.itemsPerPage)) return
 126
 127     this.pagination.currentPage += 1
 128     this.search()
 129   }
 130
 131   onFiltered () {
 132     this.resetPagination()
 133
 134     this.updateUrlFromAdvancedSearch()
 135   }
 136
 137   numberOfFilters () {
 138     return this.advancedSearch.size()
 139   }
 140
 141   removeVideoFromArray (video: Video) {
 142     this.results = this.results.filter(r => !this.isVideo(r) || r.id !== video.id)
 143   }
 144
 145   private resetPagination () {
 146     this.pagination.currentPage = 1
 147     this.pagination.totalItems = null
 148     this.channelsPerPage = 2
 149
 150     this.results = []
 151   }
 152
 153   private updateTitle () {
 154     const suffix = this.currentSearch ? ' ' + this.currentSearch : ''
 155     this.metaService.setTitle(this.i18n('Search') + suffix)
 156   }
 157
 158   private updateUrlFromAdvancedSearch () {
 159     const search = this.currentSearch || undefined
 160
 161     this.router.navigate([], {
 162       relativeTo: this.route,
 163       queryParams: Object.assign({}, this.advancedSearch.toUrlObject(), { search })
 164     })
 165   }
 166 }