import { Directive, HostListener, EventEmitter, Output } from '@angular/core';
import { KeySet, ForbiddenInput } from './classes';

@Directive({
  selector: '[ang-no-digits]'
})

export class NoDigitsDirective {

  keyset = new KeySet().digits();
  @Output('ang-no-digits') forbiddenInput = new EventEmitter<ForbiddenInput>();
  
  @HostListener('keydown', ['$event'])
  whileTyping(e: KeyboardEvent){

    const forbidden = this.keyset.has(e.key);

    if(forbidden){
      !e.repeat && this.forbiddenInput.emit(new ForbiddenInput(e))
      return false;
    }
  }

}