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?? Editing: Isbn.php

<?php
/**
 * Copyright since 2007 PrestaShop SA and Contributors
 * PrestaShop is an International Registered Trademark & Property of PrestaShop SA
 *
 * NOTICE OF LICENSE
 *
 * This source file is subject to the Open Software License (OSL 3.0)
 * that is bundled with this package in the file LICENSE.md.
 * It is also available through the world-wide-web at this URL:
 * https://opensource.org/licenses/OSL-3.0
 * If you did not receive a copy of the license and are unable to
 * obtain it through the world-wide-web, please send an email
 * to license@prestashop.com so we can send you a copy immediately.
 *
 * DISCLAIMER
 *
 * Do not edit or add to this file if you wish to upgrade PrestaShop to newer
 * versions in the future. If you wish to customize PrestaShop for your
 * needs please refer to https://devdocs.prestashop.com/ for more information.
 *
 * @author    PrestaShop SA and Contributors <contact@prestashop.com>
 * @copyright Since 2007 PrestaShop SA and Contributors
 * @license   https://opensource.org/licenses/OSL-3.0 Open Software License (OSL 3.0)
 */

declare(strict_types=1);

namespace PrestaShop\PrestaShop\Core\Domain\Product\ValueObject;

use PrestaShop\PrestaShop\Core\Domain\Product\Exception\ProductConstraintException;

/**
 * Holds product ISBN code value
 */
class Isbn
{
    /**
     * Valid ISBN regex pattern
     */
    public const VALID_PATTERN = '/^[0-9-]{0,32}$/';

/**
     * Maximum allowed symbols
     */
    public const MAX_LENGTH = 32;

/**
     * @var string
     */
    private $value;

/**
     * @param string $value
     */
    public function __construct(string $value)
    {
        $this->assertIsbnIsValid($value);
        $this->value = $value;
    }

/**
     * @return string
     */
    public function getValue(): string
    {
        return $this->value;
    }

/**
     * @param string $value
     *
     * @throws ProductConstraintException
     */
    private function assertIsbnIsValid(string $value): void
    {
        if (strlen($value) <= self::MAX_LENGTH && preg_match(self::VALID_PATTERN, $value)) {
            return;
        }

throw new ProductConstraintException(
            sprintf(
                'Invalid ISBN "%s". It should match pattern "%s" and cannot exceed %s symbols',
                $value,
                self::VALID_PATTERN,
                self::MAX_LENGTH
            ),
            ProductConstraintException::INVALID_ISBN
        );
    }
}

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