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Revision Autor Zeilennr. Zeile
148 lars 1 
<?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\Codec;
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use Ramsey\Uuid\Guid\Guid;
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use Ramsey\Uuid\UuidInterface;
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use function bin2hex;
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use function sprintf;
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use function substr;
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/**
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 * GuidStringCodec encodes and decodes globally unique identifiers (GUID)
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 *
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 * @see Guid
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 *
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 * @psalm-immutable
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 */
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class GuidStringCodec extends StringCodec
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{
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    public function encode(UuidInterface $uuid): string
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    {
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        $hex = bin2hex($uuid->getFields()->getBytes());
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        /** @var non-empty-string */
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        return sprintf(
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            '%02s%02s%02s%02s-%02s%02s-%02s%02s-%04s-%012s',
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            substr($hex, 6, 2),
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            substr($hex, 4, 2),
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            substr($hex, 2, 2),
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            substr($hex, 0, 2),
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            substr($hex, 10, 2),
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            substr($hex, 8, 2),
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            substr($hex, 14, 2),
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            substr($hex, 12, 2),
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            substr($hex, 16, 4),
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            substr($hex, 20),
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        );
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    }
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    public function decode(string $encodedUuid): UuidInterface
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    {
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        $bytes = $this->getBytes($encodedUuid);
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        return $this->getBuilder()->build($this, $this->swapBytes($bytes));
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    }
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    public function decodeBytes(string $bytes): UuidInterface
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    {
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        // Specifically call parent::decode to preserve correct byte order
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        return parent::decode(bin2hex($bytes));
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    }
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    /**
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     * Swaps bytes according to the GUID rules
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     */
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    private function swapBytes(string $bytes): string
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    {
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        return $bytes[3] . $bytes[2] . $bytes[1] . $bytes[0]
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            . $bytes[5] . $bytes[4]
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            . $bytes[7] . $bytes[6]
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            . substr($bytes, 8);
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    }
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}