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| 1 | <?php |
| 2 | namespace Wikibase\Lexeme\Search\Elastic; |
| 3 | |
| 4 | use CirrusSearch\CirrusSearch; |
| 5 | use SearchEngine; |
| 6 | use Wikibase\DataModel\Entity\EntityDocument; |
| 7 | use Wikibase\Lexeme\Domain\Model\Lexeme; |
| 8 | use Wikibase\Search\Elastic\Fields\TermIndexField; |
| 9 | |
| 10 | /** |
| 11 | * Field implementing Lexeme's lemma |
| 12 | */ |
| 13 | class LemmaField extends TermIndexField { |
| 14 | |
| 15 | public const NAME = 'lemma'; |
| 16 | |
| 17 | public function __construct() { |
| 18 | parent::__construct( static::NAME, \SearchIndexField::INDEX_TYPE_TEXT ); |
| 19 | } |
| 20 | |
| 21 | /** |
| 22 | * @param SearchEngine $engine |
| 23 | * |
| 24 | * @return array |
| 25 | */ |
| 26 | public function getMapping( SearchEngine $engine ) { |
| 27 | // Since we need a specially tuned field, we can not use |
| 28 | // standard search engine types. |
| 29 | if ( !( $engine instanceof CirrusSearch ) ) { |
| 30 | // For now only Cirrus/Elastic is supported |
| 31 | return []; |
| 32 | } |
| 33 | |
| 34 | $config = $this->getUnindexedField(); |
| 35 | $config['fields']['prefix'] = |
| 36 | $this->getSubfield( 'prefix_asciifolding', 'near_match_asciifolding' ); |
| 37 | $config['fields']['near_match'] = $this->getSubfield( 'near_match' ); |
| 38 | $config['fields']['near_match_folded'] = $this->getSubfield( 'near_match_asciifolding' ); |
| 39 | // TODO: we don't seem to be using this, check if we need it? |
| 40 | $config['copy_to'] = 'labels_all'; |
| 41 | |
| 42 | return $config; |
| 43 | } |
| 44 | |
| 45 | /** |
| 46 | * @param EntityDocument $entity |
| 47 | * |
| 48 | * @return mixed Get the value of the field to be indexed when a page/document |
| 49 | * is indexed. This might be an array with nested data, if the field |
| 50 | * is defined with nested type or an int or string for simple field types. |
| 51 | */ |
| 52 | public function getFieldData( EntityDocument $entity ) { |
| 53 | if ( !( $entity instanceof Lexeme ) ) { |
| 54 | return []; |
| 55 | } |
| 56 | /** |
| 57 | * @var Lexeme $entity |
| 58 | */ |
| 59 | return array_values( $entity->getLemmas()->toTextArray() ); |
| 60 | } |
| 61 | |
| 62 | } |