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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\Converter\Time;
use Ramsey\Uuid\Converter\TimeConverterInterface;
use Ramsey\Uuid\Math\CalculatorInterface;
use Ramsey\Uuid\Math\RoundingMode;
use Ramsey\Uuid\Type\Hexadecimal;
use Ramsey\Uuid\Type\Integer as IntegerObject;
use Ramsey\Uuid\Type\Time;
use function explode;
use function str_pad;
use const STR_PAD_LEFT;
/**
* UnixTimeConverter converts Unix Epoch timestamps to/from hexadecimal values
* consisting of milliseconds elapsed since the Unix Epoch
*
* @psalm-immutable
*/
class UnixTimeConverter implements TimeConverterInterface
{
private const MILLISECONDS = 1000;
public function __construct(private CalculatorInterface $calculator)
{
}
public function calculateTime(string $seconds, string $microseconds): Hexadecimal
{
$timestamp = new Time($seconds, $microseconds);
// Convert the seconds into milliseconds.
$sec = $this->calculator->multiply(
$timestamp->getSeconds(),
new IntegerObject(self::MILLISECONDS),
);
// Convert the microseconds into milliseconds; the scale is zero because
// we need to discard the fractional part.
$usec = $this->calculator->divide(
RoundingMode::DOWN, // Always round down to stay in the previous millisecond.
0,
$timestamp->getMicroseconds(),
new IntegerObject(self::MILLISECONDS),
);
/** @var IntegerObject $unixTime */
$unixTime = $this->calculator->add($sec, $usec);
$unixTimeHex = str_pad(
$this->calculator->toHexadecimal($unixTime)->toString(),
12,
'0',
STR_PAD_LEFT
);
return new Hexadecimal($unixTimeHex);
}
public function convertTime(Hexadecimal $uuidTimestamp): Time
{
$milliseconds = $this->calculator->toInteger($uuidTimestamp);
$unixTimestamp = $this->calculator->divide(
RoundingMode::HALF_UP,
6,
$milliseconds,
new IntegerObject(self::MILLISECONDS)
);
$split = explode('.', (string) $unixTimestamp, 2);
return new Time($split[0], $split[1] ?? '0');
}
}
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