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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 SplObjectStorage; |
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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 SplObjectStorage Memoization for already coded character trees. |
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*/ |
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private $codeMemoization; |
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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 = $codeMap; |
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$this->codeMemoization = new SplObjectStorage(); |
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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 $charTree): CharTree |
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{ |
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return CharTree::fromArray($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 variants of the character tree. |
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*/ |
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private function applyInternal(CharTree $charTree): array |
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{ |
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if (!isset($this->codeMemoization[$charTree])) { |
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$this->codeMemoization[$charTree] = $this->code($charTree); |
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} |
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return $this->codeMemoization[$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 variants of the character tree. Memoization is not used. |
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*/ |
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private function code(CharTree $charTree): array |
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{ |
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$charTrees = []; |
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foreach ($this->codeMap->getMap($charTree) as $char => $codedChars) { |
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$branches = $this->applyInternal($charTree->getBranchesAfterRoot((string)$char)); |
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foreach ($codedChars as $codedChar) { |
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$charTrees[] = CharTree::fromString($codedChar, $branches); |
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} |
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} |
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return $charTrees; |
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} |
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} |
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Stadly /
PasswordPolice
