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<?php
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/**
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* This file is part of the ramsey/uuid library
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*
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* For the full copyright and license information, please view the LICENSE
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* file that was distributed with this source code.
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*
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* @copyright Copyright (c) Ben Ramsey <ben@benramsey.com>
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* @license http://opensource.org/licenses/MIT MIT
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*/
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declare(strict_types=1);
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namespace Ramsey\Uuid\Converter\Time;
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use Ramsey\Uuid\Converter\TimeConverterInterface;
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use Ramsey\Uuid\Math\CalculatorInterface;
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use Ramsey\Uuid\Math\RoundingMode;
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use Ramsey\Uuid\Type\Hexadecimal;
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use Ramsey\Uuid\Type\Integer as IntegerObject;
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use Ramsey\Uuid\Type\Time;
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use function explode;
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use function str_pad;
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use const STR_PAD_LEFT;
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/**
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* UnixTimeConverter converts Unix Epoch timestamps to/from hexadecimal values
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* consisting of milliseconds elapsed since the Unix Epoch
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*
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* @psalm-immutable
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*/
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class UnixTimeConverter implements TimeConverterInterface
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{
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private const MILLISECONDS = 1000;
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public function __construct(private CalculatorInterface $calculator)
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{
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}
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public function calculateTime(string $seconds, string $microseconds): Hexadecimal
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{
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$timestamp = new Time($seconds, $microseconds);
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// Convert the seconds into milliseconds.
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$sec = $this->calculator->multiply(
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$timestamp->getSeconds(),
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new IntegerObject(self::MILLISECONDS),
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);
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// Convert the microseconds into milliseconds; the scale is zero because
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// we need to discard the fractional part.
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$usec = $this->calculator->divide(
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RoundingMode::DOWN, // Always round down to stay in the previous millisecond.
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0,
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$timestamp->getMicroseconds(),
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new IntegerObject(self::MILLISECONDS),
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);
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/** @var IntegerObject $unixTime */
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$unixTime = $this->calculator->add($sec, $usec);
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$unixTimeHex = str_pad(
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$this->calculator->toHexadecimal($unixTime)->toString(),
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12,
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'0',
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STR_PAD_LEFT
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);
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return new Hexadecimal($unixTimeHex);
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}
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public function convertTime(Hexadecimal $uuidTimestamp): Time
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{
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$milliseconds = $this->calculator->toInteger($uuidTimestamp);
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$unixTimestamp = $this->calculator->divide(
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RoundingMode::HALF_UP,
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6,
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$milliseconds,
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new IntegerObject(self::MILLISECONDS)
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);
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$split = explode('.', (string) $unixTimestamp, 2);
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return new Time($split[0], $split[1] ?? '0');
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}
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}
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