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author | Max Kostikov <max@kostikov.co> | 2018-09-28 15:46:14 +0200 |
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committer | Max Kostikov <max@kostikov.co> | 2018-09-28 15:46:14 +0200 |
commit | 4a904fa3a8af1c101ede76657249fb7eb47faf60 (patch) | |
tree | 544509813fb68579ef2b556ce879a971d183269a /vendor/ramsey/uuid/src/Generator/CombGenerator.php | |
parent | f5f6ec3d71acb3e0488386819d5060e59331ec23 (diff) | |
parent | c13d7e29ef9676b0f0e4ae23aa52e203f4ad8895 (diff) | |
download | volse-hubzilla-4a904fa3a8af1c101ede76657249fb7eb47faf60.tar.gz volse-hubzilla-4a904fa3a8af1c101ede76657249fb7eb47faf60.tar.bz2 volse-hubzilla-4a904fa3a8af1c101ede76657249fb7eb47faf60.zip |
Merge branch 'patch-29' into 'dev'
Patch 29
See merge request Kostikov/core!3
Diffstat (limited to 'vendor/ramsey/uuid/src/Generator/CombGenerator.php')
-rw-r--r-- | vendor/ramsey/uuid/src/Generator/CombGenerator.php | 88 |
1 files changed, 88 insertions, 0 deletions
diff --git a/vendor/ramsey/uuid/src/Generator/CombGenerator.php b/vendor/ramsey/uuid/src/Generator/CombGenerator.php new file mode 100644 index 000000000..7a9482318 --- /dev/null +++ b/vendor/ramsey/uuid/src/Generator/CombGenerator.php @@ -0,0 +1,88 @@ +<?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\Converter\NumberConverterInterface; + +/** + * CombGenerator provides functionality to generate COMB (combined GUID/timestamp) + * sequential UUIDs + * + * @link https://en.wikipedia.org/wiki/Globally_unique_identifier#Sequential_algorithms + */ +class CombGenerator implements RandomGeneratorInterface +{ + const TIMESTAMP_BYTES = 6; + + /** + * @var RandomGeneratorInterface + */ + private $randomGenerator; + + /** + * @var NumberConverterInterface + */ + private $converter; + + /** + * Constructs a `CombGenerator` using a random-number generator and a number converter + * + * @param RandomGeneratorInterface $generator Random-number generator for the non-time part. + * @param NumberConverterInterface $numberConverter Instance of number converter. + */ + public function __construct(RandomGeneratorInterface $generator, NumberConverterInterface $numberConverter) + { + $this->converter = $numberConverter; + $this->randomGenerator = $generator; + } + + /** + * Generates a string of binary data of the specified length + * + * @param integer $length The number of bytes of random binary data to generate + * @return string A binary string + * @throws \Ramsey\Uuid\Exception\UnsatisfiedDependencyException if `Moontoast\Math\BigNumber` is not present + * @throws \InvalidArgumentException if length is not a positive integer + * @throws \Exception + */ + public function generate($length) + { + if ($length < self::TIMESTAMP_BYTES || $length < 0) { + throw new \InvalidArgumentException('Length must be a positive integer.'); + } + + $hash = ''; + + if (self::TIMESTAMP_BYTES > 0 && $length > self::TIMESTAMP_BYTES) { + $hash = $this->randomGenerator->generate($length - self::TIMESTAMP_BYTES); + } + + $lsbTime = str_pad($this->converter->toHex($this->timestamp()), self::TIMESTAMP_BYTES * 2, '0', STR_PAD_LEFT); + + return hex2bin(str_pad(bin2hex($hash), $length - self::TIMESTAMP_BYTES, '0') . $lsbTime); + } + + /** + * Returns current timestamp as integer, precise to 0.00001 seconds + * + * @return string + */ + private function timestamp() + { + $time = explode(' ', microtime(false)); + + return $time[1] . substr($time[0], 2, 5); + } +} |