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vendor/ramsey/uuid/src/Converter/Time/BigNumberTimeConverter.php

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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),
+        );
+    }
+}