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| 1 | <?php |
| 2 | |
| 3 | namespace Wikibase\MediaInfo\Search\ASTQueryBuilder; |
| 4 | |
| 5 | use CirrusSearch\Parser\AST\ParsedNode; |
| 6 | use CirrusSearch\Parser\AST\ParsedQuery; |
| 7 | use Elastica\Query\AbstractQuery; |
| 8 | use Elastica\Query\BoolQuery; |
| 9 | use Elastica\Query\DisMax; |
| 10 | use Elastica\Query\MatchNone; |
| 11 | use Elastica\Query\MatchQuery; |
| 12 | use Wikibase\MediaInfo\Search\MediaSearchASTEntitiesExtractor; |
| 13 | use Wikibase\Search\Elastic\Fields\StatementsField; |
| 14 | |
| 15 | class WikibaseEntitiesHandler implements ParsedNodeHandlerInterface { |
| 16 | /** @var ParsedNode */ |
| 17 | private $node; |
| 18 | |
| 19 | /** @var ParsedQuery */ |
| 20 | private $query; |
| 21 | |
| 22 | /** @var MediaSearchASTEntitiesExtractor */ |
| 23 | private $entitiesExtractor; |
| 24 | |
| 25 | /** @var array */ |
| 26 | private $boosts; |
| 27 | |
| 28 | /** @var bool */ |
| 29 | private $variableBoost; |
| 30 | |
| 31 | public function __construct( |
| 32 | ParsedNode $node, |
| 33 | ParsedQuery $query, |
| 34 | MediaSearchASTEntitiesExtractor $entitiesExtractor, |
| 35 | array $boosts, |
| 36 | array $options |
| 37 | ) { |
| 38 | $this->node = $node; |
| 39 | $this->query = $query; |
| 40 | $this->entitiesExtractor = $entitiesExtractor; |
| 41 | $this->boosts = $boosts; |
| 42 | $this->variableBoost = $options['entitiesVariableBoost']; |
| 43 | } |
| 44 | |
| 45 | public function transform(): AbstractQuery { |
| 46 | $entities = $this->entitiesExtractor->getEntities( $this->query, $this->node ); |
| 47 | if ( count( $entities ) === 0 ) { |
| 48 | return new MatchNone(); |
| 49 | } |
| 50 | |
| 51 | $statementsQueries = []; |
| 52 | $weightedTagsQueries = []; |
| 53 | |
| 54 | foreach ( $entities as $entity ) { |
| 55 | if ( $entity['score'] >= 0 ) { |
| 56 | foreach ( $this->boosts['statement'] ?? [] as $propertyId => $weight ) { |
| 57 | $statementBoost = $this->variableBoost ? $weight * $entity['score'] : $weight; |
| 58 | if ( $statementBoost > 0 ) { |
| 59 | $statementsQueries[] = $this->getFieldMatch( |
| 60 | StatementsField::NAME, |
| 61 | $propertyId . StatementsField::STATEMENT_SEPARATOR . $entity['entityId'], |
| 62 | $statementBoost |
| 63 | ); |
| 64 | } |
| 65 | } |
| 66 | } |
| 67 | |
| 68 | // ONLY do weighted_tags queries if we have an exact match |
| 69 | // weighted_tags is a very powerful search signal, so we want to be sure we're |
| 70 | // searching for the right thing |
| 71 | if ( $entity['score'] >= 1 ) { |
| 72 | foreach ( $this->boosts['weighted_tags'] ?? [] as $prefix => $weight ) { |
| 73 | $weightedTagBoost = $this->variableBoost ? $weight * $entity['score'] : $weight; |
| 74 | if ( $weightedTagBoost > 0 ) { |
| 75 | $weightedTagsQueries[] = $this->getFieldMatch( |
| 76 | 'weighted_tags', |
| 77 | $prefix . $entity['entityId'], |
| 78 | $weightedTagBoost |
| 79 | ); |
| 80 | } |
| 81 | } |
| 82 | } |
| 83 | } |
| 84 | |
| 85 | $statementsQuery = new DisMax(); |
| 86 | foreach ( $statementsQueries as $query ) { |
| 87 | $statementsQuery->addQuery( $query ); |
| 88 | } |
| 89 | $weightedTagsQuery = new BoolQuery(); |
| 90 | $weightedTagsQuery->setMinimumShouldMatch( 1 ); |
| 91 | foreach ( $weightedTagsQueries as $query ) { |
| 92 | $weightedTagsQuery->addShould( $query ); |
| 93 | } |
| 94 | |
| 95 | if ( count( $statementsQueries ) === 0 && count( $weightedTagsQueries ) === 0 ) { |
| 96 | return new MatchNone(); |
| 97 | } |
| 98 | if ( count( $weightedTagsQueries ) === 0 ) { |
| 99 | return $statementsQuery; |
| 100 | } |
| 101 | if ( count( $statementsQueries ) === 0 ) { |
| 102 | return $weightedTagsQuery; |
| 103 | } |
| 104 | $query = new BoolQuery(); |
| 105 | $query->setMinimumShouldMatch( 1 ); |
| 106 | $query->addShould( $statementsQuery ); |
| 107 | $query->addShould( $weightedTagsQuery ); |
| 108 | return $query; |
| 109 | } |
| 110 | |
| 111 | private function getFieldMatch( string $field, string $query, float $boost ): MatchQuery { |
| 112 | return ( new MatchQuery() ) |
| 113 | ->setFieldQuery( $field, $query ) |
| 114 | ->setFieldBoost( $field, $boost ); |
| 115 | } |
| 116 | } |