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<?php |
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declare(strict_types=1); |
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namespace Funivan\PhpTokenizer\Pattern; |
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use Funivan\PhpTokenizer\Collection; |
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use Funivan\PhpTokenizer\Exception\Exception; |
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use Funivan\PhpTokenizer\QuerySequence\QuerySequence; |
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/** |
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* |
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*/ |
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class PatternMatcher implements PatternMatcherInterface { |
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/** |
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* @var Collection[] |
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*/ |
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protected $collections = []; |
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/** |
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* @param Collection $collection |
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*/ |
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public function __construct(Collection $collection) { |
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$this->collections[] = $collection; |
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} |
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/** |
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* @inheritdoc |
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*/ |
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public function apply(callable $pattern) { |
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# Clear current collections. |
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# We will add new one and iterate over current |
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$collections = $this->collections; |
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$this->collections = []; |
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foreach ($collections as $collection) { |
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$collectionsResult = $this->iterateOverCollections($pattern, $collection); |
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foreach ($collectionsResult as $resultCollection) { |
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$this->collections[] = $resultCollection; |
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} |
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} |
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return $this; |
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} |
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/** |
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* @inheritdoc |
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*/ |
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public function getCollections() { |
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return $this->collections; |
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} |
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/** |
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* @param callable $pattern |
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* @param Collection $collection |
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* @return Collection[] |
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* @throws Exception |
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*/ |
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protected function iterateOverCollections(callable $pattern, Collection $collection) { |
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$result = []; |
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$collection->rewind(); |
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foreach ($collection as $index => $token) { |
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$querySequence = new QuerySequence($collection, $index); |
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$patternResult = $pattern($querySequence); |
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if ($patternResult === null) { |
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continue; |
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} |
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if (!($patternResult instanceof Collection)) { |
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throw new Exception('Invalid result from pattern callback. Expect Collection. Given:' . gettype($patternResult)); |
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} |
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$result[] = $patternResult; |
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} |
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return $result; |
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} |
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} |
funivan /
PhpTokenizer
