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<?php declare(strict_types=1); |
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namespace Uuid; |
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/** |
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* Class Uuid |
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* |
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* @package Uuid |
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*/ |
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final class Uuid |
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{ |
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public const NAMESPACE_DNS = '6ba7b810-9dad-11d1-80b4-00c04fd430c8'; |
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public const NAMESPACE_URL = '6ba7b811-9dad-11d1-80b4-00c04fd430c8'; |
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public const NAMESPACE_OID = '6ba7b812-9dad-11d1-80b4-00c04fd430c8'; |
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public const NAMESPACE_X500 = '6ba7b814-9dad-11d1-80b4-00c04fd430c8'; |
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private const BYTES_LENGTH = 16; |
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private const VERSION = 0x50; |
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private const CLEAR_VARIANT = 0x3F; |
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private const RFC_VARIANT = 0x80; |
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private const CLEAR_VERSION = 0x0F; |
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/** |
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* @var string |
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*/ |
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private $source; |
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/** |
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* @var string |
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*/ |
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private $namespace; |
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/** |
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* Uuid constructor. |
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* |
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* @param string $source |
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*/ |
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private function __construct(string $source) |
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{ |
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$this->source = $source; |
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$this->setNamespace(self::NAMESPACE_DNS); |
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} |
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/** |
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* @param string $namespace |
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* |
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* @return Uuid |
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*/ |
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public function setNamespace(string $namespace): Uuid |
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{ |
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$namespace = preg_replace('/^urn:uuid:/is', '', $namespace); |
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$namespace = preg_replace('/[^a-f0-9]/is', '', $namespace); |
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$this->namespace = $namespace; |
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return $this; |
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} |
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/** |
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* @param string $source |
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* |
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* @return Uuid |
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*/ |
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public static function source(string $source): Uuid |
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{ |
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return new self($source); |
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} |
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/** |
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* @return Uuid |
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*/ |
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public static function random(): Uuid |
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{ |
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$source = random_bytes(self::BYTES_LENGTH); |
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return new self($source); |
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} |
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/** |
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* @return string |
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*/ |
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public function generate(): string |
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{ |
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$binary_namespace = pack('H*', $this->namespace); |
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$hash = sha1($binary_namespace . $this->source, true); |
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$uuid = substr($hash, 0, self::BYTES_LENGTH); |
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$uuid[6] = chr(ord($uuid[6]) & self::CLEAR_VERSION | self::VERSION); |
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$uuid[8] = chr(ord($uuid[8]) & self::CLEAR_VARIANT | self::RFC_VARIANT); |
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$uuid = $this->separateUuid($uuid); |
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return $uuid; |
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} |
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/** |
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* @param string $uuid |
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* |
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* @return string |
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*/ |
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private function separateUuid(string $uuid): string |
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{ |
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$result = bin2hex(substr($uuid, 0, 4)); |
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$result .= '-' . bin2hex(substr($uuid, 4, 2)); |
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$result .= '-' . bin2hex(substr($uuid, 6, 2)); |
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$result .= '-' . bin2hex(substr($uuid, 8, 2)); |
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$result .= '-' . bin2hex(substr($uuid, 10, 6)); |
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return $result; |
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} |
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} |
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fkulakov /
uuid
