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<?php |
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namespace SilverStripe\FullTextSearch\Search\Criteria; |
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use SilverStripe\FullTextSearch\Search\Adapters\SearchAdapterInterface; |
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use SilverStripe\FullTextSearch\Search\Queries\AbstractSearchQueryWriter; |
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/** |
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* Class SearchCriteria |
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* @package SilverStripe\FullTextSearch\Criteria |
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*/ |
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class SearchCriteria implements SearchCriteriaInterface |
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{ |
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/** |
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* @param string |
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*/ |
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const CONJUNCTION_AND = 'AND'; |
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/** |
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* @param string |
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*/ |
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const CONJUNCTION_OR = 'OR'; |
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/** |
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* A collection of SearchCriterion and SearchCriteria. |
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* |
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* @var SearchCriteriaInterface[] |
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*/ |
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protected $clauses = array(); |
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/** |
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* The conjunctions used between Criteria (AND/OR). |
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* |
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* @var string[] |
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*/ |
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protected $conjunctions = array(); |
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/** |
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* @var SearchAdapterInterface|null |
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*/ |
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protected $adapter = null; |
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/** |
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* You can pass through a string value, Criteria object, or Criterion object for $target. |
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* |
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* String value might be "SiteTree_Title" or whatever field in your index that you're trying to target. |
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* |
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* If you require complex filtering then you can build your Criteria object first with multiple layers/levels of |
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* Criteria, and then pass it in here when you're ready. |
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* |
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* If you have your own Criterion object that you've created that you want to use, you can also pass that in here. |
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* |
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* @param string|SearchCriterion $target |
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* @param mixed $value |
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* @param string|null $comparison |
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* @param AbstractSearchQueryWriter $searchQueryWriter |
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*/ |
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public function __construct( |
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$target, |
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$value = null, |
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$comparison = null, |
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AbstractSearchQueryWriter $searchQueryWriter = null |
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) { |
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$this->addClause($this->getCriterionForCondition($target, $value, $comparison, $searchQueryWriter)); |
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} |
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/** |
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* Static create method provided so that you can perform method chaining. |
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* |
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* @param $target |
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* @param null $value |
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* @param null $comparison |
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* @param AbstractSearchQueryWriter $searchQueryWriter |
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* @return SearchCriteria |
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*/ |
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public static function create( |
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$target, |
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$value = null, |
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$comparison = null, |
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AbstractSearchQueryWriter $searchQueryWriter = null |
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) { |
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return new SearchCriteria($target, $value, $comparison, $searchQueryWriter); |
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} |
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/** |
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* @return null|SearchAdapterInterface |
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*/ |
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public function getAdapter() |
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{ |
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return $this->adapter; |
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} |
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/** |
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* @param SearchAdapterInterface $adapter |
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* @return $this |
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*/ |
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public function setAdapter(SearchAdapterInterface $adapter) |
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{ |
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$this->adapter = $adapter; |
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return $this; |
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} |
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/** |
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* @param string $ps Current prepared statement. |
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* @return void |
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* @throws \Exception |
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*/ |
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public function appendPreparedStatementTo(&$ps) |
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{ |
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$adapter = $this->getAdapter(); |
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if (!$adapter instanceof SearchAdapterInterface) { |
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throw new \Exception('No adapter has been applied to SearchCriteria'); |
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} |
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$ps .= $adapter->getOpenComparisonContainer(); |
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foreach ($this->getClauses() as $key => $clause) { |
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$clause->setAdapter($adapter); |
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$clause->appendPreparedStatementTo($ps); |
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// There's always one less conjunction then there are clauses. |
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if ($this->getConjunction($key) !== null) { |
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$ps .= $adapter->getConjunctionFor($this->getConjunction($key)); |
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} |
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} |
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$ps .= $adapter->getCloseComparisonContainer(); |
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} |
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/** |
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* @param string|SearchCriteriaInterface $target |
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* @param mixed $value |
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* @param string|null $comparison |
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* @param AbstractSearchQueryWriter $searchQueryWriter |
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* @return $this |
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*/ |
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public function addAnd( |
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$target, |
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$value = null, |
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$comparison = null, |
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AbstractSearchQueryWriter $searchQueryWriter = null |
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) { |
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$criterion = $this->getCriterionForCondition($target, $value, $comparison, $searchQueryWriter); |
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$this->addConjunction(SearchCriteria::CONJUNCTION_AND); |
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$this->addClause($criterion); |
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return $this; |
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} |
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/** |
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* @param string|SearchCriteriaInterface $target |
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* @param mixed $value |
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* @param string|null $comparison |
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* @param AbstractSearchQueryWriter $searchQueryWriter |
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* @return $this |
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*/ |
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public function addOr( |
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$target, |
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$value = null, |
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$comparison = null, |
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AbstractSearchQueryWriter $searchQueryWriter = null |
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) { |
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$criterion = $this->getCriterionForCondition($target, $value, $comparison, $searchQueryWriter); |
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$this->addConjunction(SearchCriteria::CONJUNCTION_OR); |
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$this->addClause($criterion); |
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return $this; |
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} |
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/** |
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* @param string|SearchCriteriaInterface $target |
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* @param mixed $value |
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* @param string $comparison |
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* @param AbstractSearchQueryWriter $searchQueryWriter |
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* @return SearchCriteriaInterface |
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*/ |
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protected function getCriterionForCondition( |
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$target, |
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$value, |
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$comparison, |
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AbstractSearchQueryWriter $searchQueryWriter = null |
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) { |
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if ($target instanceof SearchCriteriaInterface) { |
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return $target; |
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} |
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return new SearchCriterion($target, $value, $comparison, $searchQueryWriter); |
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} |
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/** |
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* @return SearchCriteriaInterface[] |
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*/ |
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protected function getClauses() |
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{ |
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return $this->clauses; |
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} |
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/** |
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* @param SearchCriteriaInterface $criterion |
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*/ |
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protected function addClause($criterion) |
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{ |
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$this->clauses[] = $criterion; |
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} |
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/** |
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* @return string[] |
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*/ |
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protected function getConjunctions() |
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{ |
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return $this->conjunctions; |
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} |
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/** |
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* @param int $key |
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* @return string|null |
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*/ |
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protected function getConjunction($key) |
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{ |
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$conjunctions = $this->getConjunctions(); |
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if (!array_key_exists($key, $conjunctions)) { |
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return null; |
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} |
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return $conjunctions[$key]; |
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} |
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/** |
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* @param string $conjunction |
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*/ |
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protected function addConjunction($conjunction) |
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{ |
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$this->conjunctions[] = $conjunction; |
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} |
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} |
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