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<?php |
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namespace KGzocha\Searcher\Chain; |
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use KGzocha\Searcher\Chain\Collection\CellCollectionInterface; |
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use KGzocha\Searcher\Criteria\Collection\CriteriaCollectionInterface; |
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use KGzocha\Searcher\Result\ResultCollection; |
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use KGzocha\Searcher\SearcherInterface; |
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/** |
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* This class represents whole chain of searchers, but it behaves like regular searcher. |
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* It will perform all (not skipped) sub-searches, transform theirs results into CriteriaCollection |
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* and pass those criteria to next sub-search. |
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* At the end it will return collection of all the results from all the steps. |
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* |
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* @author Krzysztof Gzocha <[email protected]> |
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*/ |
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class ChainSearch implements SearcherInterface |
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{ |
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/** |
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* @var CellCollectionInterface |
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*/ |
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private $cellCollection; |
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/** |
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* @param CellCollectionInterface $cellCollection |
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*/ |
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public function __construct(CellCollectionInterface $cellCollection) |
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{ |
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$this->cellCollection = $cellCollection; |
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} |
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/** |
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* Will perform multiple sub-searches. |
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* Results from first search will be transformed and passed as CriteriaCollection |
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* to another sub-search. |
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* Whole process will return collection of results from each sub-search. |
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* |
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* @param CriteriaCollectionInterface $criteriaCollection |
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* |
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* @return ResultCollection |
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*/ |
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public function search( |
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CriteriaCollectionInterface $criteriaCollection |
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) { |
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$previousCriteria = $criteriaCollection; |
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$previousResults = null; |
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$result = new ResultCollection(); |
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/** @var CellInterface $cell */ |
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foreach ($this->cellCollection as $name => $cell) { |
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if ($cell->getTransformer()->skip($previousResults)) { |
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continue; |
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} |
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$previousResults = $cell->getSearcher()->search($previousCriteria); |
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$previousCriteria = $this->getNewCriteria( |
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$cell, |
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$previousCriteria, |
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$previousResults |
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); |
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$result->addNamedItem($name, $previousResults); |
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} |
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return $result; |
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} |
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/** |
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* If $cell has transformer then it will be used to return new criteria. |
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* If not old criteria will be returned. |
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* |
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* @param CellInterface $cell |
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* @param CriteriaCollectionInterface $criteria |
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* @param mixed $results |
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* |
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* @return CriteriaCollectionInterface |
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*/ |
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private function getNewCriteria( |
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CellInterface $cell, |
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CriteriaCollectionInterface $criteria, |
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$results |
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) { |
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if (!$cell->hasTransformer()) { |
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return $criteria; |
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} |
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return $cell |
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->getTransformer() |
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->transform($results, $criteria); |
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} |
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} |
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krzysztof-gzocha /
searcher
