import { Pipe, PipeTransform } from '@angular/core';
import { transliterate } from 'transliteration';

@Pipe({
  name: 'translit',
})
export class TranslitPipe implements PipeTransform {
  transform(value: string) {
    if (!value || /^[a-z0-9-_.,\[\]!@#$%^&*{}|\/\\ ]+$/i.test(value))
      return undefined;

    const translit = transliterate(value);
    return translit !== value ? translit : undefined;
  }
}