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<?php

/**
 * This file is part of the ramsey/uuid library
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 *
 * @copyright Copyright (c) Ben Ramsey <[email protected]>
 * @license http://opensource.org/licenses/MIT MIT
 */

declare(strict_types=1);

namespace Ramsey\Uuid\Rfc4122;

/**
 * Provides common functionality for max UUIDs
 *
 * The max UUID is special form of UUID that is specified to have all 128 bits
 * set to one. It is the inverse of the nil UUID.
 *
 * @link https://datatracker.ietf.org/doc/html/draft-ietf-uuidrev-rfc4122bis-00#section-5.10 Max UUID
 *
 * @psalm-immutable
 */
trait MaxTrait
{
    /**
     * Returns the bytes that comprise the fields
     */
    abstract public function getBytes(): string;

    /**
     * Returns true if the byte string represents a max UUID
     */
    public function isMax(): bool
    {
        return $this->getBytes() === "\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff";
    }
}