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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 <ben@benramsey.com>
* @license http://opensource.org/licenses/MIT MIT
*/
declare(strict_types=1);
namespace Ramsey\Uuid\Codec;
use Ramsey\Uuid\Guid\Guid;
use Ramsey\Uuid\UuidInterface;
use function bin2hex;
use function sprintf;
use function substr;
/**
* GuidStringCodec encodes and decodes globally unique identifiers (GUID)
*
* @see Guid
*
* @psalm-immutable
*/
class GuidStringCodec extends StringCodec
{
public function encode(UuidInterface $uuid): string
{
$hex = bin2hex($uuid->getFields()->getBytes());
/** @var non-empty-string */
return sprintf(
'%02s%02s%02s%02s-%02s%02s-%02s%02s-%04s-%012s',
substr($hex, 6, 2),
substr($hex, 4, 2),
substr($hex, 2, 2),
substr($hex, 0, 2),
substr($hex, 10, 2),
substr($hex, 8, 2),
substr($hex, 14, 2),
substr($hex, 12, 2),
substr($hex, 16, 4),
substr($hex, 20),
);
}
public function decode(string $encodedUuid): UuidInterface
{
$bytes = $this->getBytes($encodedUuid);
return $this->getBuilder()->build($this, $this->swapBytes($bytes));
}
public function decodeBytes(string $bytes): UuidInterface
{
// Specifically call parent::decode to preserve correct byte order
return parent::decode(bin2hex($bytes));
}
/**
* Swaps bytes according to the GUID rules
*/
private function swapBytes(string $bytes): string
{
return $bytes[3] . $bytes[2] . $bytes[1] . $bytes[0]
. $bytes[5] . $bytes[4]
. $bytes[7] . $bytes[6]
. substr($bytes, 8);
}
}
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