<?php
/**
 * OrangeHRM is a comprehensive Human Resource Management (HRM) System that captures
 * all the essential functionalities required for any enterprise.
 * Copyright (C) 2006 OrangeHRM Inc., http://www.orangehrm.com
 *
 * OrangeHRM is free software: you can redistribute it and/or modify it under the terms of
 * the GNU General Public License as published by the Free Software Foundation, either
 * version 3 of the License, or (at your option) any later version.
 *
 * OrangeHRM 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License along with OrangeHRM.
 * If not, see <https://www.gnu.org/licenses/>.
 */

namespace OrangeHRM\Core\Api\V2\Validator\Rules;

class Email extends AbstractRule
{
    /**
     * @link https://developer.mozilla.org/en-US/docs/Web/HTML/Element/input/email#basic_validation
     */
    public const EMAIL_REGEX = '/^[a-zA-Z0-9.!#$%&\'*+\\/=?^_`{|}~-]+@[a-zA-Z0-9](?:[a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?(?:\.[a-zA-Z0-9](?:[a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?)+$/';

    /**
     * @inheritDoc
     */
    public function validate($input): bool
    {
        if (!is_scalar($input)) {
            return false;
        }

        if ((string) $input === "") {
            return true;
        }

        return preg_match(self::EMAIL_REGEX, (string) $input) > 0;
    }
}
