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<?php |
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namespace Firesphere\ElasticSearch\Queries\Builders; |
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use Firesphere\ElasticSearch\Indexes\ElasticIndex; |
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use Firesphere\ElasticSearch\Queries\ElasticQuery; |
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use Firesphere\SearchBackend\Indexes\CoreIndex; |
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use Firesphere\SearchBackend\Interfaces\QueryBuilderInterface; |
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use Firesphere\SearchBackend\Queries\BaseQuery; |
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class QueryBuilder implements QueryBuilderInterface |
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{ |
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/** |
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* @var ElasticQuery |
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*/ |
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protected $query; |
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/** |
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* @var ElasticIndex |
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*/ |
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protected $index; |
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/** |
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* @param ElasticQuery $query |
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* @param ElasticIndex $index |
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* @return self |
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*/ |
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protected static function init(ElasticQuery $query, ElasticIndex $index): self |
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{ |
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$self = new self(); |
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$self->setIndex($index); |
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$self->setQuery($query); |
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return $self; |
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} |
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/** |
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* @param ElasticQuery $query |
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* @param ElasticIndex $index |
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* @return array |
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*/ |
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public static function buildQuery(BaseQuery $query, CoreIndex $index): array |
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{ |
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$self = self::init($query, $index); |
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$filters = $self->getFilters($index, $query); |
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$orFilters = $self->getOrFilters($query); |
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// Always primarily search against the _text field, that's where all content is |
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$terms = $self->getUserQuery($query); // There's always a term |
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if (count($filters)) { |
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$filters = ['filter' => ['bool' => ['must' => $filters]]]; |
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$terms = array_merge($terms, $filters); |
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} |
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if (count($orFilters)) { |
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$terms['filter']['bool']['should'] = $orFilters; |
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} |
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return [ |
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'index' => $index->getIndexName(), |
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'from' => $query->getStart(), |
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'size' => $query->getRows(), |
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'body' => [ |
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'query' => [ |
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'bool' => $terms, |
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], |
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] |
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]; |
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} |
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/** |
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* Required must-be filters if they're here. |
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* @param CoreIndex|ElasticIndex $index |
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* @param ElasticQuery|BaseQuery $query |
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* @return array[] |
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*/ |
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private function getFilters(CoreIndex|ElasticIndex $index, ElasticQuery|BaseQuery $query): array |
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{ |
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// Default, |
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$filters = [ |
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[ |
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'terms' => [ |
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'ViewStatus' => $index->getViewStatusFilter(), |
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] |
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] |
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]; |
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if (count($query->getFilters())) { |
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foreach ($query->getFilters() as $key => $value) { |
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$value = is_array($value) ?: [$value]; |
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$filters[] = ['terms' => [$key => $value]]; |
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} |
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} |
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return $filters; |
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} |
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/** |
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* Create the "should" filter, that is OR instead of AND |
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* @param BaseQuery $query |
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* @return array |
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*/ |
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private function getOrFilters(BaseQuery $query) |
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{ |
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$filters = []; |
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if (count($query->getOrFilters())) { |
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foreach ($query->getOrFilters() as $key => $value) { |
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$value = is_array($value) ?: [$value]; |
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$filters[] = ['terms' => [$key => $value]]; |
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} |
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} |
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return $filters; |
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} |
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/** |
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* this allows for multiple search terms to be entered |
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* @param ElasticQuery|BaseQuery $query |
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* @return array |
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*/ |
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private function getUserQuery(ElasticQuery|BaseQuery $query): array |
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{ |
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$q = []; |
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$terms = $query->getTerms(); |
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$type = 'match'; |
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if (!count($terms)) { |
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$type = 'wildcard'; |
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$terms = ['*']; |
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} |
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foreach ($terms as $term) { |
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$q['must'][] = ['match' => ['_text' => $term['text']]]; |
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if ($type !== 'wildcard') { |
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$q = $this->getFieldBoosting($term, $type, $q); |
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} |
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} |
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return $q; |
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} |
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/** |
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* @param mixed $term |
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* @param string $type |
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* @param array $q |
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* @return array |
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*/ |
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private function getFieldBoosting(mixed $term, string $type, array $q): array |
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{ |
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$shoulds = []; |
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$queryBoosts = $this->query->getBoostedFields(); |
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if ($term['boost'] > 1 && count($term['fields'])) { |
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foreach ($term['fields'] as $field) { |
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$shoulds[] = $this->addShould($type, $field, $term['text'], $term['boost']); |
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} |
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} |
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foreach ($queryBoosts as $field => $boost) { |
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$shoulds[] = $this->addShould($type, $field, $term['text'], $boost); |
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} |
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if (count($shoulds)) { |
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$q['should'] = $shoulds; |
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} |
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return $q; |
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} |
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/** |
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* @param mixed $query |
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*/ |
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public function setQuery($query): void |
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{ |
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$this->query = $query; |
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} |
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/** |
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* @param mixed $index |
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*/ |
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public function setIndex($index): void |
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{ |
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$this->index = $index; |
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} |
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/** |
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* @param string $type |
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* @param string $field |
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* @param $text |
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* @param int $boost |
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* @return array |
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*/ |
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private function addShould(string $type, string $field, $text, int $boost): array |
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{ |
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$should = [ |
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$type => [ |
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$field => [ |
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'query' => $text, |
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'boost' => $boost |
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] |
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] |
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]; |
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return $should; |
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} |
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} |
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Firesphere /
silverstripe-elastic
