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| 1 | <?php |
| 2 | |
| 3 | namespace Wikibase\MediaInfo\Search\ASTQueryBuilder; |
| 4 | |
| 5 | use CirrusSearch\Parser\AST\PhraseQueryNode; |
| 6 | use Elastica\Query\AbstractQuery; |
| 7 | use Elastica\Query\BoolQuery; |
| 8 | use Elastica\Query\MatchPhrase; |
| 9 | use Elastica\Query\MatchQuery; |
| 10 | |
| 11 | class PhraseQueryNodeHandler implements ParsedNodeHandlerInterface { |
| 12 | /** @var PhraseQueryNode */ |
| 13 | private $node; |
| 14 | |
| 15 | /** @var WikibaseEntitiesHandler */ |
| 16 | private $entitiesHandler; |
| 17 | |
| 18 | /** @var FieldIterator */ |
| 19 | private $termScoringFieldIterator; |
| 20 | |
| 21 | public function __construct( |
| 22 | PhraseQueryNode $node, |
| 23 | WikibaseEntitiesHandler $entitiesHandler, |
| 24 | array $languages, |
| 25 | array $stemmingSettings, |
| 26 | array $boosts, |
| 27 | array $decays |
| 28 | ) { |
| 29 | $this->node = $node; |
| 30 | $this->entitiesHandler = $entitiesHandler; |
| 31 | |
| 32 | $fields = array_keys( $boosts ); |
| 33 | $fields = $node->isStem() ? |
| 34 | array_intersect( $fields, FieldIterator::STEMMED_FIELDS ) : |
| 35 | array_intersect( $fields, FieldIterator::PLAIN_FIELDS ); |
| 36 | // "field:[suggest] was indexed without position data; cannot run PhraseQuery" |
| 37 | $fields = array_diff( $fields, [ 'suggest' ] ); |
| 38 | |
| 39 | $this->termScoringFieldIterator = new FieldIterator( |
| 40 | $this->getTermScoringFieldQueryBuilder( $node->getPhrase(), $node->getSlop() ), |
| 41 | $fields, |
| 42 | $languages, |
| 43 | $stemmingSettings, |
| 44 | $boosts, |
| 45 | $decays |
| 46 | ); |
| 47 | } |
| 48 | |
| 49 | public function transform(): AbstractQuery { |
| 50 | $query = new BoolQuery(); |
| 51 | $query->setMinimumShouldMatch( 1 ); |
| 52 | |
| 53 | // phrase query |
| 54 | $phraseQuery = new BoolQuery(); |
| 55 | // filter does all the work, should's are for scoring. |
| 56 | $phraseQuery->setMinimumShouldMatch( 0 ); |
| 57 | $field = $this->node->isStem() ? 'all' : 'all.plain'; |
| 58 | $phraseQuery->addFilter( |
| 59 | // quick overall filter; this is faster at narrowing down |
| 60 | // the resultset then matching all fields individually |
| 61 | ( new MatchPhrase() ) |
| 62 | ->setFieldQuery( $field, $this->node->getPhrase() ) |
| 63 | ->setFieldParam( $field, 'slop', max( 0, $this->node->getSlop() ) ) |
| 64 | ); |
| 65 | foreach ( $this->termScoringFieldIterator as $fieldQuery ) { |
| 66 | // also add scoring clauses per field, for weighted scoring |
| 67 | $phraseQuery->addShould( $fieldQuery ); |
| 68 | } |
| 69 | $query->addShould( $phraseQuery ); |
| 70 | |
| 71 | // wikibase entities (that match phrase query) |
| 72 | $query->addShould( $this->entitiesHandler->transform() ); |
| 73 | |
| 74 | return $query; |
| 75 | } |
| 76 | |
| 77 | /** |
| 78 | * @param string $phrase |
| 79 | * @param int $slop |
| 80 | * @return FieldQueryBuilderInterface |
| 81 | */ |
| 82 | private function getTermScoringFieldQueryBuilder( $phrase, $slop ): FieldQueryBuilderInterface { |
| 83 | return new class( $phrase, $slop ) implements FieldQueryBuilderInterface { |
| 84 | /** @var string */ |
| 85 | private $phrase; |
| 86 | |
| 87 | /** @var int */ |
| 88 | private $slop; |
| 89 | |
| 90 | public function __construct( $phrase, $slop ) { |
| 91 | $this->phrase = $phrase; |
| 92 | $this->slop = $slop; |
| 93 | } |
| 94 | |
| 95 | public function getQuery( $field, $boost ): AbstractQuery { |
| 96 | return ( new MatchQuery() ) |
| 97 | ->setFieldQuery( $field, $this->phrase ) |
| 98 | ->setFieldBoost( $field, $boost ); |
| 99 | } |
| 100 | }; |
| 101 | } |
| 102 | } |