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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\Generator;
use Ramsey\Uuid\Converter\TimeConverterInterface;
use Ramsey\Uuid\Provider\TimeProviderInterface;
use function hex2bin;
/**
* UnixTimeGenerator generates bytes that combine a 48-bit timestamp in
* milliseconds since the Unix Epoch with 80 random bits
*/
class UnixTimeGenerator implements TimeGeneratorInterface
{
public function __construct(
private TimeConverterInterface $timeConverter,
private TimeProviderInterface $timeProvider,
private RandomGeneratorInterface $randomGenerator
) {
}
/**
* @inheritDoc
*/
public function generate($node = null, ?int $clockSeq = null): string
{
// Generate 10 random bytes to append to the string returned, since our
// time bytes will consist of 6 bytes.
$random = $this->randomGenerator->generate(10);
$time = $this->timeProvider->getTime();
$unixTimeHex = $this->timeConverter->calculateTime(
$time->getSeconds()->toString(),
$time->getMicroseconds()->toString(),
);
return hex2bin($unixTimeHex->toString()) . $random;
}
}
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