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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\Converter\Time;
use Moontoast\Math\BigNumber;
use Ramsey\Uuid\Converter\TimeConverterInterface;
/**
* BigNumberTimeConverter uses the moontoast/math library's `BigNumber` to
* provide facilities for converting parts of time into representations that may
* be used in UUIDs
*/
class BigNumberTimeConverter implements TimeConverterInterface
{
/**
* Uses the provided seconds and micro-seconds to calculate the time_low,
* time_mid, and time_high fields used by RFC 4122 version 1 UUIDs
*
* @param string $seconds
* @param string $microSeconds
* @return string[] An array containing `low`, `mid`, and `high` keys
* @link http://tools.ietf.org/html/rfc4122#section-4.2.2
*/
public function calculateTime($seconds, $microSeconds)
{
$uuidTime = new BigNumber('0');
$sec = new BigNumber($seconds);
$sec->multiply('10000000');
$usec = new BigNumber($microSeconds);
$usec->multiply('10');
$uuidTime->add($sec)
->add($usec)
->add('122192928000000000');
$uuidTimeHex = sprintf('%016s', $uuidTime->convertToBase(16));
return array(
'low' => substr($uuidTimeHex, 8),
'mid' => substr($uuidTimeHex, 4, 4),
'hi' => substr($uuidTimeHex, 0, 4),
);
}
}
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