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| 1 | <?php |
| 2 | |
| 3 | namespace CirrusSearch\Search\Rescore; |
| 4 | |
| 5 | use CirrusSearch\SearchConfig; |
| 6 | use Elastica\Query\FunctionScore; |
| 7 | use RequestContext; |
| 8 | |
| 9 | /** |
| 10 | * Boosts documents in user language and in wiki language if different |
| 11 | * Uses getUserLanguage in SearchConfig and LanguageCode for language values |
| 12 | * and CirrusSearchLanguageWeight['user'|'wiki'] for respective weights. |
| 13 | */ |
| 14 | class LangWeightFunctionScoreBuilder extends FunctionScoreBuilder { |
| 15 | /** |
| 16 | * @var string user language |
| 17 | */ |
| 18 | private $userLang; |
| 19 | |
| 20 | /** |
| 21 | * @var float user language weight |
| 22 | */ |
| 23 | private $userWeight; |
| 24 | |
| 25 | /** |
| 26 | * @var string wiki language |
| 27 | */ |
| 28 | private $wikiLang; |
| 29 | |
| 30 | /** |
| 31 | * @var float wiki language weight |
| 32 | */ |
| 33 | private $wikiWeight; |
| 34 | |
| 35 | /** |
| 36 | * @param SearchConfig $config |
| 37 | * @param float $weight |
| 38 | * @param string|null $userLang |
| 39 | */ |
| 40 | public function __construct( SearchConfig $config, $weight, $userLang = null ) { |
| 41 | parent::__construct( $config, $weight ); |
| 42 | $this->userLang = $userLang; |
| 43 | $this->userWeight = |
| 44 | $config->getElement( 'CirrusSearchLanguageWeight', 'user' ); |
| 45 | $this->wikiLang = $config->get( 'LanguageCode' ); |
| 46 | $this->wikiWeight = |
| 47 | $config->getElement( 'CirrusSearchLanguageWeight', 'wiki' ); |
| 48 | } |
| 49 | |
| 50 | public function append( FunctionScore $functionScore ) { |
| 51 | // Boost pages in a user's language |
| 52 | $userLang = $this->getUserLang(); |
| 53 | if ( $this->userWeight ) { |
| 54 | $functionScore->addWeightFunction( $this->userWeight * $this->weight, |
| 55 | new \Elastica\Query\Term( [ 'language' => $userLang ] ) ); |
| 56 | } |
| 57 | |
| 58 | // And a wiki's language, if it's different |
| 59 | if ( $this->wikiWeight && $this->userLang != $this->wikiLang ) { |
| 60 | $functionScore->addWeightFunction( $this->wikiWeight * $this->weight, |
| 61 | new \Elastica\Query\Term( [ 'language' => $this->wikiLang ] ) ); |
| 62 | } |
| 63 | } |
| 64 | |
| 65 | private function getUserLang() { |
| 66 | if ( $this->userLang === null ) { |
| 67 | $this->userLang = RequestContext::getMain()->getLanguage()->getCode(); |
| 68 | } |
| 69 | return $this->userLang; |
| 70 | } |
| 71 | } |