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<?php |
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|
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namespace WindPressPackages\Hidehalo\Nanoid; |
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|
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class Core implements CoreInterface |
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{ |
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/** |
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* @inheritDoc |
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* @see https://github.com/ai/nanoid/blob/master/async/index.browser.js#L4 |
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*/ |
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public function random(GeneratorInterface $generator, $size, $alphabet = CoreInterface::SAFE_SYMBOLS) |
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{ |
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$len = \strlen($alphabet); |
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$mask = (2 << (int) (\log($len - 1) / \M_LN2)) - 1; |
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$step = (int) \ceil(1.6 * $mask * $size / $len); |
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$id = ''; |
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while (\true) { |
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$bytes = $generator->random($step); |
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// NOTE: `$bytes` maybe not a normal "Array" |
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// sometimes it's begin from index 1, use iterator please |
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foreach ($bytes as $byte) { |
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$byte &= $mask; |
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if (isset($alphabet[$byte])) { |
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$id .= $alphabet[$byte]; |
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if (\strlen($id) === $size) { |
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return $id; |
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} |
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} |
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} |
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} |
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} |
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} |
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