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import { Component, EventEmitter, forwardRef, Input, OnInit, Output } from '@angular/core'
import { ControlValueAccessor, NG_VALUE_ACCESSOR } from '@angular/forms'
import { NotificationsService } from 'angular2-notifications'
import { I18n } from '@ngx-translate/i18n-polyfill'
@Component({
selector: 'my-reactive-file',
styleUrls: [ './reactive-file.component.scss' ],
templateUrl: './reactive-file.component.html',
providers: [
{
provide: NG_VALUE_ACCESSOR,
useExisting: forwardRef(() => ReactiveFileComponent),
multi: true
}
]
})
export class ReactiveFileComponent implements OnInit, ControlValueAccessor {
@Input() inputLabel: string
@Input() inputName: string
@Input() extensions: string[] = []
@Input() maxFileSize: number
@Input() displayFilename = false
@Output() fileChanged = new EventEmitter<Blob>()
allowedExtensionsMessage = ''
fileInputValue: any
private file: File
constructor (
private notificationsService: NotificationsService,
private i18n: I18n
) {}
get filename () {
if (!this.file) return ''
return this.file.name
}
ngOnInit () {
this.allowedExtensionsMessage = this.extensions.join(', ')
}
fileChange (event: any) {
if (event.target.files && event.target.files.length) {
const [ file ] = event.target.files
if (file.size > this.maxFileSize) {
this.notificationsService.error(this.i18n('Error'), this.i18n('This file is too large.'))
return
}
this.file = file
this.propagateChange(this.file)
this.fileChanged.emit(this.file)
}
}
propagateChange = (_: any) => { /* empty */ }
writeValue (file: any) {
this.file = file
if (!this.file) this.fileInputValue = null
}
registerOnChange (fn: (_: any) => void) {
this.propagateChange = fn
}
registerOnTouched () {
// Unused
}
}
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