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| <?php | |
| namespace CirrusSearch; | |
| /** | |
| * Defines support strategies regarding cross wiki searches. | |
| * | |
| * Cross wiki search techniques include: | |
| * - extra indices searches (i.e. search media files on commons) | |
| * - cross project searches | |
| * - cross language searches (i.e. second try attempt) | |
| */ | |
| class CrossSearchStrategy { | |
| /** | |
| * @see InterwikiSearcher | |
| * @var bool | |
| */ | |
| private $crossProjectSearchSupported; | |
| /** | |
| * @see \CirrusSearch::searchTextSecondTry() | |
| * @var bool | |
| */ | |
| private $crossLanguageSearchSupported; | |
| /** | |
| * Controlled by $wgCirrusSearchExtraIndexes | |
| * (Usually used to search media files on commons from any host wikis) | |
| * @var bool | |
| */ | |
| private $extraIndicesSearchSupported; | |
| /** | |
| * @var CrossSearchStrategy | |
| */ | |
| private static $hostWikiOnly; | |
| /** | |
| * @var CrossSearchStrategy | |
| */ | |
| private static $allWikisStrategy; | |
| /** | |
| * Only host wiki is supported | |
| * Applies to features that are probably not available on any | |
| * other target wiki cirrus may access. | |
| * @return CrossSearchStrategy | |
| */ | |
| public static function hostWikiOnlyStrategy() { | |
| if ( self::$hostWikiOnly === null ) { | |
| self::$hostWikiOnly = new CrossSearchStrategy( false, false, false ); | |
| } | |
| return self::$hostWikiOnly; | |
| } | |
| /** | |
| * Applies to features that must be available on any target wiki. | |
| * | |
| * @return CrossSearchStrategy | |
| */ | |
| public static function allWikisStrategy() { | |
| if ( self::$allWikisStrategy === null ) { | |
| self::$allWikisStrategy = new CrossSearchStrategy( true, true, true ); | |
| } | |
| return self::$allWikisStrategy; | |
| } | |
| /** | |
| * @param bool $crossProjectSearchSupported | |
| * @param bool $crossLanguageSearchSupported | |
| * @param bool $extraIndicesSupported | |
| */ | |
| public function __construct( $crossProjectSearchSupported, $crossLanguageSearchSupported, $extraIndicesSupported ) { | |
| $this->crossProjectSearchSupported = $crossProjectSearchSupported; | |
| $this->crossLanguageSearchSupported = $crossLanguageSearchSupported; | |
| $this->extraIndicesSearchSupported = $extraIndicesSupported; | |
| } | |
| /** | |
| * Is cross project search supported (aka interwiki search) | |
| * @return bool | |
| */ | |
| public function isCrossProjectSearchSupported() { | |
| return $this->crossProjectSearchSupported; | |
| } | |
| /** | |
| * Is cross language search supported (i.e. second try language search) | |
| * @return bool | |
| */ | |
| public function isCrossLanguageSearchSupported() { | |
| return $this->crossLanguageSearchSupported; | |
| } | |
| /** | |
| * (in WMF context it's most commonly used to search media files | |
| * on commons from any wikis.) | |
| * | |
| * See wgCirrusSearchExtraIndexes | |
| * @return bool | |
| */ | |
| public function isExtraIndicesSearchSupported() { | |
| return $this->extraIndicesSearchSupported; | |
| } | |
| /** | |
| * Intersect this strategy with other. | |
| * @param CrossSearchStrategy $other | |
| * @return CrossSearchStrategy | |
| */ | |
| public function intersect( CrossSearchStrategy $other ) { | |
| if ( $other === self::hostWikiOnlyStrategy() || $this === self::hostWikiOnlyStrategy() ) { | |
| return self::hostWikiOnlyStrategy(); | |
| } | |
| $crossL = $other->crossLanguageSearchSupported && $this->crossLanguageSearchSupported; | |
| $crossP = $other->crossProjectSearchSupported && $this->crossProjectSearchSupported; | |
| $otherI = $other->extraIndicesSearchSupported && $this->extraIndicesSearchSupported; | |
| if ( $crossL === $crossP && $crossP === $otherI ) { | |
| if ( $crossL ) { | |
| return self::allWikisStrategy(); | |
| } else { | |
| return self::hostWikiOnlyStrategy(); | |
| } | |
| } | |
| return new CrossSearchStrategy( $crossP, $crossL, $otherI ); | |
| } | |
| } |