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<?php |
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namespace Fwolf\Util\Uuid; |
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use Fwolf\Util\BaseConverter\BaseConverterAwareTrait; |
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6
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/** |
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* UUID generator using base-62 character (0-9a-zA-Z) |
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* |
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* |
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* second: 6 chars, seconds in microtime. |
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* base_convert('ZZZZZZ', 62, 10) = 56800235583 = 3769-12-05 11:13:03 |
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* base_convert('100000', 62, 10) = 916132832 = 1999-01-12 17:20:32 |
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* |
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* microsecond: 4 chars, micro-second in microtime, multiple 1000000. |
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* base_convert(999999, 10, 62) = 4c91 |
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* |
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* group: 2 chars |
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* base_convert('zz', 62, 10) = 3843, enough to group server. |
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* |
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* random: 6 chars |
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* 62^6 = 56800235584, about 13x of 16^8 = 4294967296, |
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* and microsecond is 100x of general UUID. |
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* (Notice: base_convert() does not allow base greater than 36.) |
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* |
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* Notice: Mix of a-zA-Z may not suit for Mysql UUID, because Mysql default |
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* compare string CASE INSENSITIVE. |
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* |
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* @copyright Copyright 2013-2016 Fwolf |
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* @license http://opensource.org/licenses/MIT MIT |
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*/ |
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class Base62 extends AbstractTimeBasedUuidGenerator |
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{ |
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use BaseConverterAwareTrait; |
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/** |
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* {@inheritdoc} |
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*/ |
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const LENGTH = 24; |
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/** |
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* {@inheritdoc} |
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*/ |
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const LENGTH_SECOND = 6; |
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/** |
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* {@inheritdoc} |
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*/ |
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const LENGTH_MICROSECOND = 4; |
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/** |
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* {@inheritdoc} |
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*/ |
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const LENGTH_GROUP = 2; |
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/** |
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* {@inheritdoc} |
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*/ |
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const LENGTH_CUSTOM = 6; |
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/** |
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* {@inheritdoc} |
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*/ |
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const LENGTH_RANDOM = 6; |
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/** |
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* {@inheritdoc} |
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*/ |
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const LENGTH_CHECK_DIGIT = 0; |
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/** |
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* {@inheritdoc} |
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*/ |
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const SEPARATOR = ''; |
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/** |
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* {@inheritdoc} |
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*/ |
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public function explain($uuid) |
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{ |
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$explanation = parent::explain($uuid); |
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$converter = $this->getBaseConverter(); |
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$second = $converter->convert($explanation->getSecond(), 62, 10); |
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$explanation->setSecond(date('Y-m-d H:i:s', $second)); |
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$microsecond = |
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$converter->convert($explanation->getMicrosecond(), 62, 10); |
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$explanation->setMicrosecond($microsecond); |
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return $explanation; |
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} |
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/** |
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* {@inheritdoc} |
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* |
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100
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* Parent method result md5, here only need 9 digit of them. |
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* base_convert('f{8}', 16, 62) = cOu4kx |
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* base_convert('f{9}', 16, 62) = 3j1L7jb |
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*/ |
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protected function generateCustomPartAuto() |
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{ |
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$seed = parent::generateCustomPartAuto(); |
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$seed = substr($seed, 0, 9); |
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$converter = $this->getBaseConverter(); |
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$custom = $converter->convert($seed, 16, 62); |
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// In case convert result not fulfill the length |
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return $custom . '000000'; |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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protected function generateRandomPart() |
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{ |
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$converter = $this->getBaseConverter(); |
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// base_convert('ZZZ', 62, 10) = 238327 |
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// base_convert('100', 62, 10) = 3844 |
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$randomPart = $converter->convert(mt_rand(3844, 238327), 10, 62) . |
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$converter->convert(mt_rand(0, 238327), 10, 62); |
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return $randomPart; |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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protected function generateTimeParts() |
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{ |
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list($microSecond, $second) = explode(' ', microtime()); |
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$converter = $this->getBaseConverter(); |
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$second = $converter->convert($second, 10, 62); |
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$microSecond = round($microSecond * 1000000); |
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$microSecond = $converter->convert($microSecond, 10, 62); |
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$microSecond = str_pad( |
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$microSecond, |
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static::LENGTH_MICROSECOND, |
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'0', |
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STR_PAD_LEFT |
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); |
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153
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return [$second, $microSecond]; |
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} |
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} |
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fwolf /
uuid.php
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