Abstract time generation into family of TimeGeneratorInterface classes

src/Generator/DefaultTimeGenerator.php

@@ -0,0 +1,70 @@
+<?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\Generator;
+
+use Ramsey\Uuid\UuidFactory;
+
+class DefaultTimeGenerator implements TimeGeneratorInterface
+{
+    public function generate(UuidFactory $factory, $node = null, $clockSeq = null)
+    {
+        $node = $this->getValidNode($node, $factory);
+
+        if ($clockSeq === null) {
+            // Not using "stable storage"; see RFC 4122, Section 4.2.1.1
+            $clockSeq = mt_rand(0, 1 << 14);
+        }
+
+        // Create a 60-bit time value as a count of 100-nanosecond intervals
+        // since 00:00:00.00, 15 October 1582
+        $timeOfDay = $factory->getTimeProvider()->currentTime();
+        $uuidTime = $factory->getTimeConverter()->calculateTime($timeOfDay['sec'], $timeOfDay['usec']);
+
+        $timeHi = $factory->applyVersion($uuidTime['hi'], 1);
+        $clockSeqHi = $factory->applyVariant($clockSeq >> 8);
+
+        $hex = vsprintf(
+            '%08s%04s%04s%02s%02s%012s',
+            array(
+                $uuidTime['low'],
+                $uuidTime['mid'],
+                sprintf('%04x', $timeHi),
+                sprintf('%02x', $clockSeqHi),
+                sprintf('%02x', $clockSeq & 0xff),
+                $node,
+            )
+        );
+
+        return hex2bin($hex);
+    }
+
+    protected function getValidNode($node, UuidFactory $factory)
+    {
+        if ($node === null) {
+            $node = $factory->getNodeProvider()->getNode();
+        }
+
+        // Convert the node to hex, if it is still an integer
+        if (is_int($node)) {
+            $node = sprintf('%012x', $node);
+        }
+
+        if (! ctype_xdigit($node) || strlen($node) > 12) {
+            throw new \InvalidArgumentException('Invalid node value');
+        }
+
+        return strtolower(sprintf('%012s', $node));
+    }
+}