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<?php |
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declare(strict_types=1); |
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namespace Stadly\PasswordPolice\Formatter; |
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use Stadly\PasswordPolice\CharTree; |
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use Stadly\PasswordPolice\CodeMap; |
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use Stadly\PasswordPolice\Formatter; |
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final class Coder implements Formatter |
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{ |
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use Chaining; |
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/** |
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* @var CodeMap Code map for coding character trees. |
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*/ |
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private $codeMap; |
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/** |
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* @var CharTree[] Memoization of formatted character trees. |
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*/ |
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private $memoization = []; |
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/** |
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* @param CodeMap $codeMap Code map for coding character trees. |
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*/ |
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public function __construct(CodeMap $codeMap) |
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{ |
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$this->codeMap = $codeMap; |
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} |
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/** |
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* @param CharTree $charTree Character tree to format. |
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* @return CharTree Coded variant of the character tree. |
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*/ |
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protected function applyCurrent(CharTree $charTree): CharTree |
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{ |
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return $this->applyInternal($charTree); |
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} |
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/** |
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* @param CharTree $charTree Character tree to format. |
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* @return CharTree Coded variant of the character tree. |
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*/ |
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private function applyInternal(CharTree $charTree): CharTree |
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{ |
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// When PHP 7.1 is no longer supported, change to using spl_object_id. |
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$hash = spl_object_hash($charTree); |
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if (!isset($this->memoization[$hash])) { |
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$this->memoization[$hash] = $this->format($charTree); |
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} |
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return $this->memoization[$hash]; |
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} |
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/** |
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* @param CharTree $charTree Character tree to format. |
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* @return CharTree Coded variant of the character tree. Memoization is not used. |
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*/ |
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private function format(CharTree $charTree): CharTree |
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{ |
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if ($charTree->getRoot() === null) { |
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return $charTree; |
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} |
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$branches = []; |
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foreach ($this->codeMap->getMap($charTree) as $char => $codedChars) { |
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$branch = $this->applyInternal($charTree->getBranchesAfterRoot((string)$char)); |
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foreach ($codedChars as $codedChar) { |
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$branches[] = CharTree::fromString($codedChar, [$branch]); |
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} |
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} |
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return CharTree::fromString('', $branches); |
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} |
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} |
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Stadly /
PasswordPolice
