69 lines
2.1 KiB
PHP
69 lines
2.1 KiB
PHP
<?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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* @link https://benramsey.com/projects/ramsey-uuid/ Documentation
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* @link https://packagist.org/packages/ramsey/uuid Packagist
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* @link https://github.com/ramsey/uuid GitHub
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*/
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namespace Ramsey\Uuid\Codec;
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use InvalidArgumentException;
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use Ramsey\Uuid\UuidInterface;
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/**
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* OrderedTimeCodec optimizes the bytes to increment UUIDs when time goes by, to improve database INSERTs.
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* The string value will be unchanged from StringCodec. Only works for UUID type 1.
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*/
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class OrderedTimeCodec extends StringCodec
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{
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/**
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* Encodes a UuidInterface as an optimized binary representation of a UUID
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*
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* @param UuidInterface $uuid
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* @return string Binary string representation of a UUID
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*/
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public function encodeBinary(UuidInterface $uuid)
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{
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$fields = $uuid->getFieldsHex();
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$optimized = [
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$fields['time_hi_and_version'],
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$fields['time_mid'],
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$fields['time_low'],
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$fields['clock_seq_hi_and_reserved'],
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$fields['clock_seq_low'],
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$fields['node'],
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];
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return hex2bin(implode('', $optimized));
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}
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/**
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* Decodes an optimized binary representation of a UUID into a UuidInterface object instance
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*
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* @param string $bytes
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* @return UuidInterface
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* @throws InvalidArgumentException if string has not 16 characters
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*/
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public function decodeBytes($bytes)
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{
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if (strlen($bytes) !== 16) {
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throw new InvalidArgumentException('$bytes string should contain 16 characters.');
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}
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$hex = unpack('H*', $bytes)[1];
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// Rearrange the fields to their original order
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$hex = substr($hex, 8, 4) . substr($hex, 12, 4) . substr($hex, 4, 4) . substr($hex, 0, 4) . substr($hex, 16);
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return $this->decode($hex);
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}
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}
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