client/src/app/shared/forms/reactive-file.component.ts

   1 import { Component, EventEmitter, forwardRef, Input, OnInit, Output } from '@angular/core'
   2 import { ControlValueAccessor, NG_VALUE_ACCESSOR } from '@angular/forms'
   3 import { Notifier } from '@app/core'
   4 import { I18n } from '@ngx-translate/i18n-polyfill'
   5
   6 @Component({
   7   selector: 'my-reactive-file',
   8   styleUrls: [ './reactive-file.component.scss' ],
   9   templateUrl: './reactive-file.component.html',
  10   providers: [
  11     {
  12       provide: NG_VALUE_ACCESSOR,
  13       useExisting: forwardRef(() => ReactiveFileComponent),
  14       multi: true
  15     }
  16   ]
  17 })
  18 export class ReactiveFileComponent implements OnInit, ControlValueAccessor {
  19   @Input() inputLabel: string
  20   @Input() inputName: string
  21   @Input() extensions: string[] = []
  22   @Input() maxFileSize: number
  23   @Input() displayFilename = false
  24
  25   @Output() fileChanged = new EventEmitter<Blob>()
  26
  27   allowedExtensionsMessage = ''
  28   fileInputValue: any
  29
  30   private file: File
  31
  32   constructor (
  33     private notifier: Notifier,
  34     private i18n: I18n
  35   ) {}
  36
  37   get filename () {
  38     if (!this.file) return ''
  39
  40     return this.file.name
  41   }
  42
  43   ngOnInit () {
  44     this.allowedExtensionsMessage = this.extensions.join(', ')
  45   }
  46
  47   fileChange (event: any) {
  48     if (event.target.files && event.target.files.length) {
  49       const [ file ] = event.target.files
  50
  51       if (file.size > this.maxFileSize) {
  52         this.notifier.error(this.i18n('This file is too large.'))
  53         return
  54       }
  55
  56       const extension = '.' + file.name.split('.').pop()
  57       if (this.extensions.includes(extension) === false) {
  58         const message = this.i18n(
  59           'PeerTube cannot handle this kind of file. Accepted extensions are {{extensions}}.',
  60           { extensions: this.allowedExtensionsMessage }
  61         )
  62         this.notifier.error(message)
  63
  64         return
  65       }
  66
  67       this.file = file
  68
  69       this.propagateChange(this.file)
  70       this.fileChanged.emit(this.file)
  71     }
  72   }
  73
  74   propagateChange = (_: any) => { /* empty */ }
  75
  76   writeValue (file: any) {
  77     this.file = file
  78
  79     if (!this.file) this.fileInputValue = null
  80   }
  81
  82   registerOnChange (fn: (_: any) => void) {
  83     this.propagateChange = fn
  84   }
  85
  86   registerOnTouched () {
  87     // Unused
  88   }
  89 }