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| <?php | |
| namespace CirrusSearch\Search\Rescore; | |
| use CirrusSearch\SearchConfig; | |
| use Elastica\Query\FunctionScore; | |
| use RequestContext; | |
| /** | |
| * Boosts documents in user language and in wiki language if different | |
| * Uses getUserLanguage in SearchConfig and LanguageCode for language values | |
| * and CirrusSearchLanguageWeight['user'|'wiki'] for respective weights. | |
| */ | |
| class LangWeightFunctionScoreBuilder extends FunctionScoreBuilder { | |
| /** | |
| * @var string user language | |
| */ | |
| private $userLang; | |
| /** | |
| * @var float user language weight | |
| */ | |
| private $userWeight; | |
| /** | |
| * @var string wiki language | |
| */ | |
| private $wikiLang; | |
| /** | |
| * @var float wiki language weight | |
| */ | |
| private $wikiWeight; | |
| /** | |
| * @param SearchConfig $config | |
| * @param float $weight | |
| * @param string|null $userLang | |
| */ | |
| public function __construct( SearchConfig $config, $weight, $userLang = null ) { | |
| parent::__construct( $config, $weight ); | |
| $this->userLang = $userLang; | |
| $this->userWeight = | |
| $config->getElement( 'CirrusSearchLanguageWeight', 'user' ); | |
| $this->wikiLang = $config->get( 'LanguageCode' ); | |
| $this->wikiWeight = | |
| $config->getElement( 'CirrusSearchLanguageWeight', 'wiki' ); | |
| } | |
| public function append( FunctionScore $functionScore ) { | |
| // Boost pages in a user's language | |
| $userLang = $this->getUserLang(); | |
| if ( $this->userWeight ) { | |
| $functionScore->addWeightFunction( $this->userWeight * $this->weight, | |
| new \Elastica\Query\Term( [ 'language' => $userLang ] ) ); | |
| } | |
| // And a wiki's language, if it's different | |
| if ( $this->wikiWeight && $this->userLang != $this->wikiLang ) { | |
| $functionScore->addWeightFunction( $this->wikiWeight * $this->weight, | |
| new \Elastica\Query\Term( [ 'language' => $this->wikiLang ] ) ); | |
| } | |
| } | |
| private function getUserLang() { | |
| if ( $this->userLang === null ) { | |
| $this->userLang = RequestContext::getMain()->getLanguage()->getCode(); | |
| } | |
| return $this->userLang; | |
| } | |
| } |