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| 1 | <?php |
| 2 | |
| 3 | use MediaWiki\MediaWikiServices; |
| 4 | |
| 5 | if ( !defined( 'DB_PRIMARY' ) ) { |
| 6 | // MW < 1.37 |
| 7 | define( 'DB_PRIMARY', DB_MASTER ); |
| 8 | } |
| 9 | |
| 10 | class CargoBackLinks { |
| 11 | public static function managePageDeletion( $pageId ) { |
| 12 | if ( method_exists( MediaWikiServices::class, 'getWikiPageFactory' ) ) { |
| 13 | $page = MediaWikiServices::getInstance()->getWikiPageFactory()->newFromID( $pageId ); |
| 14 | } else { |
| 15 | $page = \WikiPage::newFromID( $pageId ); |
| 16 | } |
| 17 | $pageTitle = $page ? $page->getTitle() : null; |
| 18 | if ( $pageTitle ) { |
| 19 | $pageId = $pageTitle->getArticleID(); |
| 20 | // Purge the cache of all pages that may have this |
| 21 | // page in their displayed query results. |
| 22 | self::purgePagesThatQueryThisPage( $pageId ); |
| 23 | } |
| 24 | // Remove all entries that are based on queries that were |
| 25 | // on this page. |
| 26 | self::removeBackLinks( $pageId ); |
| 27 | } |
| 28 | |
| 29 | public static function removeBackLinks( $pageId ) { |
| 30 | $lb = MediaWikiServices::getInstance()->getDBLoadBalancer(); |
| 31 | $dbw = $lb->getConnectionRef( DB_PRIMARY ); |
| 32 | if ( $dbw->tableExists( 'cargo_backlinks' ) ) { |
| 33 | $dbw->delete( 'cargo_backlinks', [ |
| 34 | 'cbl_query_page_id' => $pageId |
| 35 | ], __METHOD__ ); |
| 36 | } |
| 37 | } |
| 38 | |
| 39 | public static function setBackLinks( $title, $resultsPageIds ) { |
| 40 | $lb = MediaWikiServices::getInstance()->getDBLoadBalancer(); |
| 41 | $dbw = $lb->getConnectionRef( DB_PRIMARY ); |
| 42 | if ( !$dbw->tableExists( 'cargo_backlinks' ) ) { |
| 43 | return; |
| 44 | } |
| 45 | // Sanity check |
| 46 | $resultsPageIds = array_unique( $resultsPageIds ); |
| 47 | |
| 48 | $pageId = $title->getArticleID(); |
| 49 | $dbw->delete( 'cargo_backlinks', [ |
| 50 | 'cbl_query_page_id' => $pageId |
| 51 | ], __METHOD__ ); |
| 52 | |
| 53 | foreach ( $resultsPageIds as $resultPageId ) { |
| 54 | if ( $resultPageId ) { |
| 55 | $dbw->insert( 'cargo_backlinks', [ |
| 56 | 'cbl_query_page_id' => $pageId, |
| 57 | 'cbl_result_page_id' => $resultPageId, |
| 58 | ] ); |
| 59 | } |
| 60 | } |
| 61 | } |
| 62 | |
| 63 | public static function purgePagesThatQueryThisPage( $resultPageId ) { |
| 64 | $lb = MediaWikiServices::getInstance()->getDBLoadBalancer(); |
| 65 | $dbr = $lb->getConnectionRef( DB_REPLICA ); |
| 66 | if ( !$dbr->tableExists( 'cargo_backlinks' ) ) { |
| 67 | return; |
| 68 | } |
| 69 | |
| 70 | $res = $dbr->select( 'cargo_backlinks', |
| 71 | [ 'cbl_query_page_id' ], |
| 72 | [ 'cbl_result_page_id' => $resultPageId ] ); |
| 73 | if ( method_exists( MediaWikiServices::class, 'getWikiPageFactory' ) ) { |
| 74 | // MW 1.36+ |
| 75 | $wikiPageFactory = MediaWikiServices::getInstance()->getWikiPageFactory(); |
| 76 | } else { |
| 77 | $wikiPageFactory = null; |
| 78 | } |
| 79 | foreach ( $res as $row ) { |
| 80 | $queryPageId = $row->cbl_query_page_id; |
| 81 | if ( $queryPageId ) { |
| 82 | if ( $wikiPageFactory !== null ) { |
| 83 | // MW 1.36+ |
| 84 | $page = $wikiPageFactory->newFromID( $queryPageId ); |
| 85 | } else { |
| 86 | $page = \WikiPage::newFromID( $queryPageId ); |
| 87 | } |
| 88 | if ( $page ) { |
| 89 | $page->doPurge(); |
| 90 | } |
| 91 | } |
| 92 | } |
| 93 | } |
| 94 | } |