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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
* @link https://benramsey.com/projects/ramsey-uuid/ Documentation
* @link https://packagist.org/packages/ramsey/uuid Packagist
* @link https://github.com/ramsey/uuid GitHub
*/
namespace Ramsey\Uuid\Codec;
use InvalidArgumentException;
use Ramsey\Uuid\UuidInterface;
/**
* OrderedTimeCodec optimizes the bytes to increment UUIDs when time goes by, to improve database INSERTs.
* The string value will be unchanged from StringCodec. Only works for UUID type 1.
*/
class OrderedTimeCodec extends StringCodec
{
/**
* Encodes a UuidInterface as an optimized binary representation of a UUID
*
* @param UuidInterface $uuid
* @return string Binary string representation of a UUID
*/
public function encodeBinary(UuidInterface $uuid)
{
$fields = $uuid->getFieldsHex();
$optimized = [
$fields['time_hi_and_version'],
$fields['time_mid'],
$fields['time_low'],
$fields['clock_seq_hi_and_reserved'],
$fields['clock_seq_low'],
$fields['node'],
];
return hex2bin(implode('', $optimized));
}
/**
* Decodes an optimized binary representation of a UUID into a UuidInterface object instance
*
* @param string $bytes
* @return UuidInterface
* @throws InvalidArgumentException if string has not 16 characters
*/
public function decodeBytes($bytes)
{
if (strlen($bytes) !== 16) {
throw new InvalidArgumentException('$bytes string should contain 16 characters.');
}
$hex = unpack('H*', $bytes)[1];
// Rearrange the fields to their original order
$hex = substr($hex, 8, 4) . substr($hex, 12, 4) . substr($hex, 4, 4) . substr($hex, 0, 4) . substr($hex, 16);
return $this->decode($hex);
}
}
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