/*
 * Copyright (c) 2024-2026 Fabian Freund.
 *
 * This file is part of WebLibre
 * (see https://weblibre.eu).
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as
 * published by the Free Software Foundation, either version 3 of the
 * License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program. If not, see <http://www.gnu.org/licenses/>.
 */
import 'dart:convert';

/// Decodes URL-safe or standard base64 text, tolerating missing padding.
String decodeBase64Text(String value) {
  final normalized = value.replaceAll('-', '+').replaceAll('_', '/');
  final padded = normalized.padRight(
    normalized.length + (4 - normalized.length % 4) % 4,
    '=',
  );
  return utf8.decode(base64Decode(padded));
}