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| <?php | |
| use MediaWiki\MediaWikiServices; | |
| if ( !defined( 'DB_PRIMARY' ) ) { | |
| // MW < 1.37 | |
| define( 'DB_PRIMARY', DB_MASTER ); | |
| } | |
| class CargoBackLinks { | |
| public static function managePageDeletion( $pageId ) { | |
| if ( method_exists( MediaWikiServices::class, 'getWikiPageFactory' ) ) { | |
| $page = MediaWikiServices::getInstance()->getWikiPageFactory()->newFromID( $pageId ); | |
| } else { | |
| $page = \WikiPage::newFromID( $pageId ); | |
| } | |
| $pageTitle = $page ? $page->getTitle() : null; | |
| if ( $pageTitle ) { | |
| $pageId = $pageTitle->getArticleID(); | |
| // Purge the cache of all pages that may have this | |
| // page in their displayed query results. | |
| self::purgePagesThatQueryThisPage( $pageId ); | |
| } | |
| // Remove all entries that are based on queries that were | |
| // on this page. | |
| self::removeBackLinks( $pageId ); | |
| } | |
| public static function removeBackLinks( $pageId ) { | |
| $lb = MediaWikiServices::getInstance()->getDBLoadBalancer(); | |
| $dbw = $lb->getConnectionRef( DB_PRIMARY ); | |
| if ( $dbw->tableExists( 'cargo_backlinks' ) ) { | |
| $dbw->delete( 'cargo_backlinks', [ | |
| 'cbl_query_page_id' => $pageId | |
| ], __METHOD__ ); | |
| } | |
| } | |
| public static function setBackLinks( $title, $resultsPageIds ) { | |
| $lb = MediaWikiServices::getInstance()->getDBLoadBalancer(); | |
| $dbw = $lb->getConnectionRef( DB_PRIMARY ); | |
| if ( !$dbw->tableExists( 'cargo_backlinks' ) ) { | |
| return; | |
| } | |
| // Sanity check | |
| $resultsPageIds = array_unique( $resultsPageIds ); | |
| $pageId = $title->getArticleID(); | |
| self::removeBackLinks( $pageId ); | |
| foreach ( $resultsPageIds as $resultPageId ) { | |
| if ( $resultPageId ) { | |
| $dbw->insert( 'cargo_backlinks', [ | |
| 'cbl_query_page_id' => $pageId, | |
| 'cbl_result_page_id' => $resultPageId, | |
| ] ); | |
| } | |
| } | |
| } | |
| public static function purgePagesThatQueryThisPage( $resultPageId ) { | |
| $lb = MediaWikiServices::getInstance()->getDBLoadBalancer(); | |
| $dbr = $lb->getConnectionRef( DB_REPLICA ); | |
| if ( !$dbr->tableExists( 'cargo_backlinks' ) ) { | |
| return; | |
| } | |
| $res = $dbr->select( 'cargo_backlinks', | |
| [ 'cbl_query_page_id' ], | |
| [ 'cbl_result_page_id' => $resultPageId ] ); | |
| if ( method_exists( MediaWikiServices::class, 'getWikiPageFactory' ) ) { | |
| // MW 1.36+ | |
| $wikiPageFactory = MediaWikiServices::getInstance()->getWikiPageFactory(); | |
| } else { | |
| $wikiPageFactory = null; | |
| } | |
| foreach ( $res as $row ) { | |
| $queryPageId = $row->cbl_query_page_id; | |
| if ( $queryPageId ) { | |
| if ( $wikiPageFactory !== null ) { | |
| // MW 1.36+ | |
| $page = $wikiPageFactory->newFromID( $queryPageId ); | |
| } else { | |
| $page = \WikiPage::newFromID( $queryPageId ); | |
| } | |
| if ( $page ) { | |
| $page->doPurge(); | |
| } | |
| } | |
| } | |
| } | |
| } |