/**
 * Copyright since 2025 Mifos Initiative
 *
 * This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/.
 */

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

@Pipe({ name: 'externalIdentifier' })
export class ExternalIdentifierPipe implements PipeTransform {
  transform(externalId: string): string {
    const limit = 20;
    if (!externalId) {
      return '';
    } else {
      const regexExp = /^[0-9a-fA-F]{8}\b-[0-9a-fA-F]{4}\b-[0-9a-fA-F]{4}\b-[0-9a-fA-F]{4}\b-[0-9a-fA-F]{12}$/gi;

      if (regexExp.test(externalId)) {
        const values = externalId.split('-');
        return values[4];
      } else {
        const inputLen = externalId.length;
        return inputLen > limit ? externalId.substring(inputLen - limit, inputLen) : externalId;
      }
    }
  }
}