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<?php |
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declare(strict_types=1); |
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namespace Doctrine\ODM\MongoDB\Id; |
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use Doctrine\ODM\MongoDB\DocumentManager; |
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use const STR_PAD_LEFT; |
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use function bccomp; |
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use function bcdiv; |
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use function bcmod; |
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use function is_numeric; |
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use function str_pad; |
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use function strlen; |
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/** |
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* AlnumGenerator is responsible for generating cased alpha-numeric unique identifiers. |
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* It extends IncrementGenerator in order to ensure uniqueness even with short strings. |
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* |
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* "Awkward safe mode" avoids combinations that results in 'dirty' words by removing |
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* the vowels from chars index |
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* |
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* A minimum identifier length can be enforced by setting a numeric value to the "pad" option |
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* (with only 6 chars you will have more than 56 billion unique id's, 15 billion in 'awkward safe mode') |
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* |
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* The character set used for ID generation can be explicitly set with the "chars" option (e.g. base36, etc.) |
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*/ |
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final class AlnumGenerator extends IncrementGenerator |
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{ |
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/** @var int|null */ |
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protected $pad = null; |
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/** @var bool */ |
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protected $awkwardSafeMode = false; |
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/** @var string */ |
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protected $chars = '0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz'; |
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/** @var string */ |
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protected $awkwardSafeChars = '0123456789BCDFGHJKLMNPQRSTVWXZbcdfghjklmnpqrstvwxz'; |
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/** |
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* Set padding on generated id |
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*/ |
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public function setPad(int $pad) : void |
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{ |
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$this->pad = $pad; |
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} |
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/** |
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* Enable awkwardSafeMode character set |
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*/ |
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public function setAwkwardSafeMode(bool $awkwardSafeMode = false) : void |
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{ |
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$this->awkwardSafeMode = $awkwardSafeMode; |
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} |
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/** |
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* Set the character set used for ID generation |
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*/ |
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public function setChars(string $chars) : void |
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{ |
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$this->chars = $chars; |
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} |
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/** @inheritDoc */ |
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public function generate(DocumentManager $dm, object $document) |
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{ |
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$id = (string) parent::generate($dm, $document); |
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$index = $this->awkwardSafeMode ? $this->awkwardSafeChars : $this->chars; |
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$base = (string) strlen($index); |
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$out = ''; |
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do { |
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$out = $index[(int) bcmod($id, $base)] . $out; |
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$id = bcdiv($id, $base); |
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} while (bccomp($id, '0') === 1); |
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if (is_numeric($this->pad)) { |
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$out = str_pad($out, $this->pad, '0', STR_PAD_LEFT); |
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} |
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return $out; |
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} |
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} |
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doctrine /
mongodb-odm
