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File / Folder	Size	Action
.	-
Command	--	ren
Factory	--	ren
AbstractUid.php	4.825KB	edt ren
BinaryUtil.php	5.895KB	edt ren
CHANGELOG.md	0.938KB	edt ren
LICENSE	1.043KB	edt ren
MaxUlid.php	0.374KB	edt ren
MaxUuid.php	0.405KB	edt ren
NilUlid.php	0.374KB	edt ren
NilUuid.php	0.461KB	edt ren
README.md	0.59KB	edt ren
TimeBasedUidInterface.php	0.507KB	edt ren
Ulid.php	6.859KB	edt ren
Uuid.php	5.686KB	edt ren
UuidV1.php	2.025KB	edt ren
UuidV3.php	0.578KB	edt ren
UuidV4.php	0.91KB	edt ren
UuidV5.php	0.578KB	edt ren
UuidV6.php	2.023KB	edt ren
UuidV7.php	5.003KB	edt ren
UuidV8.php	0.56KB	edt ren
composer.json	0.9KB	edt ren

<?php

/*
 * This file is part of the Symfony package.
 *
 * (c) Fabien Potencier <fabien@symfony.com>
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */

namespace Symfony\Component\Uid;

/**
 * A v6 UUID is lexicographically sortable and contains a 60-bit timestamp and 62 extra unique bits.
 *
 * Unlike UUIDv1, this implementation of UUIDv6 doesn't leak the MAC address of the host.
 *
 * @author Nicolas Grekas <p@tchwork.com>
 */
class UuidV6 extends Uuid implements TimeBasedUidInterface
{
    protected const TYPE = 6;

private static string $node;

public function __construct(?string $uuid = null)
    {
        if (null === $uuid) {
            $this->uid = static::generate();
        } else {
            parent::__construct($uuid, true);
        }
    }

public function getDateTime(): \DateTimeImmutable
    {
        return BinaryUtil::hexToDateTime('0'.substr($this->uid, 0, 8).substr($this->uid, 9, 4).substr($this->uid, 15, 3));
    }

public function getNode(): string
    {
        return substr($this->uid, 24);
    }

public static function generate(?\DateTimeInterface $time = null, ?Uuid $node = null): string
    {
        $uuidV1 = UuidV1::generate($time, $node);
        $uuid = substr($uuidV1, 15, 3).substr($uuidV1, 9, 4).$uuidV1[0].'-'.substr($uuidV1, 1, 4).'-6'.substr($uuidV1, 5, 3).substr($uuidV1, 18, 6);

if ($node) {
            return $uuid.substr($uuidV1, 24);
        }

// uuid_create() returns a stable "node" that can leak the MAC of the host, but
        // UUIDv6 prefers a truly random number here, let's XOR both to preserve the entropy

if (!isset(self::$node)) {
            $seed = [random_int(0, 0xFFFFFF), random_int(0, 0xFFFFFF)];
            $node = unpack('N2', hex2bin('00'.substr($uuidV1, 24, 6)).hex2bin('00'.substr($uuidV1, 30)));
            self::$node = sprintf('%06x%06x', ($seed[0] ^ $node[1]) | 0x010000, $seed[1] ^ $node[2]);
        }

return $uuid.self::$node;
    }
}