client/src/app/shared/shared-forms/advanced-input-filter.component.ts

   1 import * as debug from 'debug'
   2 import { Subject } from 'rxjs'
   3 import { debounceTime, distinctUntilChanged } from 'rxjs/operators'
   4 import { AfterViewInit, Component, EventEmitter, Input, OnInit, Output } from '@angular/core'
   5 import { ActivatedRoute, Params, Router } from '@angular/router'
   6
   7 export type AdvancedInputFilter = {
   8   label: string
   9   queryParams: Params
  10 }
  11
  12 const logger = debug('peertube:AdvancedInputFilterComponent')
  13
  14 @Component({
  15   selector: 'my-advanced-input-filter',
  16   templateUrl: './advanced-input-filter.component.html',
  17   styleUrls: [ './advanced-input-filter.component.scss' ]
  18 })
  19 export class AdvancedInputFilterComponent implements OnInit, AfterViewInit {
  20   @Input() filters: AdvancedInputFilter[] = []
  21   @Input() emitOnInit = true
  22
  23   @Output() search = new EventEmitter<string>()
  24
  25   searchValue: string
  26
  27   private searchStream: Subject<string>
  28
  29   private viewInitialized = false
  30   private emitSearchAfterViewInit = false
  31
  32   constructor (
  33     private route: ActivatedRoute,
  34     private router: Router
  35   ) { }
  36
  37   ngOnInit () {
  38     this.initSearchStream()
  39     this.listenToRouteSearchChange()
  40   }
  41
  42   ngAfterViewInit () {
  43     this.viewInitialized = true
  44
  45     // Init after view init to not send an event too early
  46     if (this.emitOnInit && this.emitSearchAfterViewInit) this.emitSearch()
  47   }
  48
  49   onInputSearch (event: Event) {
  50     this.scheduleSearchUpdate((event.target as HTMLInputElement).value)
  51   }
  52
  53   onResetTableFilter () {
  54     this.immediateSearchUpdate('')
  55   }
  56
  57   hasFilters () {
  58     return this.filters && this.filters.length !== 0
  59   }
  60
  61   private scheduleSearchUpdate (value: string) {
  62     this.searchValue = value
  63     this.searchStream.next(this.searchValue)
  64   }
  65
  66   private immediateSearchUpdate (value: string) {
  67     this.searchValue = value
  68
  69     this.setQueryParams(this.searchValue)
  70     this.emitSearch()
  71   }
  72
  73   private listenToRouteSearchChange () {
  74     this.route.queryParams
  75       .subscribe(params => {
  76         const search = params.search || ''
  77
  78         logger('On route search change "%s".', search)
  79
  80         if (this.searchValue === search) return
  81
  82         this.searchValue = search
  83         this.emitSearch()
  84       })
  85   }
  86
  87   private initSearchStream () {
  88     this.searchStream = new Subject()
  89
  90     this.searchStream
  91       .pipe(
  92         debounceTime(300),
  93         distinctUntilChanged()
  94       )
  95       .subscribe(() => {
  96         this.setQueryParams(this.searchValue)
  97
  98         this.emitSearch()
  99       })
 100   }
 101
 102   private emitSearch () {
 103     if (!this.viewInitialized) {
 104       this.emitSearchAfterViewInit = true
 105       return
 106     }
 107
 108     logger('On search "%s".', this.searchValue)
 109
 110     this.search.emit(this.searchValue)
 111   }
 112
 113   private setQueryParams (search: string) {
 114     const queryParams: Params = {}
 115
 116     if (search) Object.assign(queryParams, { search })
 117     this.router.navigate([ ], { queryParams })
 118   }
 119 }