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| CargoBackLinks | |
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| managePageDeletion | |
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| removeBackLinks | |
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| setBackLinks | |
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| purgePagesThatQueryThisPage | |
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| 1 | <?php |
| 2 | |
| 3 | use MediaWiki\MediaWikiServices; |
| 4 | |
| 5 | class CargoBackLinks { |
| 6 | |
| 7 | /** |
| 8 | * ParserOutput extension data key for backlinks. |
| 9 | */ |
| 10 | public const BACKLINKS_DATA_KEY = 'ext-cargo-backlinks'; |
| 11 | |
| 12 | public static function managePageDeletion( $pageId ) { |
| 13 | $page = MediaWikiServices::getInstance()->getWikiPageFactory()->newFromID( $pageId ); |
| 14 | $pageTitle = $page ? $page->getTitle() : null; |
| 15 | if ( $pageTitle ) { |
| 16 | $pageId = $pageTitle->getArticleID(); |
| 17 | // Purge the cache of all pages that may have this |
| 18 | // page in their displayed query results. |
| 19 | self::purgePagesThatQueryThisPage( $pageId ); |
| 20 | } |
| 21 | // Remove all entries that are based on queries that were |
| 22 | // on this page. |
| 23 | self::removeBackLinks( $pageId ); |
| 24 | } |
| 25 | |
| 26 | public static function removeBackLinks( $pageId ) { |
| 27 | global $wgCargoIgnoreBacklinks; |
| 28 | if ( $wgCargoIgnoreBacklinks ) { |
| 29 | return; |
| 30 | } |
| 31 | |
| 32 | $dbw = CargoUtils::getMainDBForWrite(); |
| 33 | if ( $dbw->tableExists( 'cargo_backlinks', __METHOD__ ) && !$dbw->isReadOnly() ) { |
| 34 | $dbw->delete( 'cargo_backlinks', [ |
| 35 | 'cbl_query_page_id' => $pageId |
| 36 | ], __METHOD__ ); |
| 37 | } |
| 38 | } |
| 39 | |
| 40 | public static function setBackLinks( $title, $resultsPageIds ) { |
| 41 | global $wgCargoIgnoreBacklinks; |
| 42 | if ( $wgCargoIgnoreBacklinks ) { |
| 43 | return; |
| 44 | } |
| 45 | |
| 46 | $dbw = CargoUtils::getMainDBForWrite(); |
| 47 | if ( !$dbw->tableExists( 'cargo_backlinks', __METHOD__ ) || $dbw->isReadOnly() ) { |
| 48 | return; |
| 49 | } |
| 50 | // Sanity check |
| 51 | $resultsPageIds = array_unique( $resultsPageIds ); |
| 52 | |
| 53 | $pageId = $title->getArticleID(); |
| 54 | $dbw->delete( 'cargo_backlinks', [ |
| 55 | 'cbl_query_page_id' => $pageId |
| 56 | ], __METHOD__ ); |
| 57 | |
| 58 | foreach ( $resultsPageIds as $resultPageId ) { |
| 59 | if ( $resultPageId ) { |
| 60 | $dbw->insert( 'cargo_backlinks', [ |
| 61 | 'cbl_query_page_id' => $pageId, |
| 62 | 'cbl_result_page_id' => $resultPageId, |
| 63 | ], __METHOD__ ); |
| 64 | } |
| 65 | } |
| 66 | } |
| 67 | |
| 68 | public static function purgePagesThatQueryThisPage( $resultPageId ) { |
| 69 | global $wgCargoIgnoreBacklinks; |
| 70 | if ( $wgCargoIgnoreBacklinks ) { |
| 71 | return; |
| 72 | } |
| 73 | |
| 74 | $dbr = CargoUtils::getMainDBForRead(); |
| 75 | if ( !$dbr->tableExists( 'cargo_backlinks', __METHOD__ ) ) { |
| 76 | return; |
| 77 | } |
| 78 | |
| 79 | $res = $dbr->select( 'cargo_backlinks', |
| 80 | [ 'cbl_query_page_id' ], |
| 81 | [ 'cbl_result_page_id' => $resultPageId ], |
| 82 | __METHOD__ |
| 83 | ); |
| 84 | $wikiPageFactory = MediaWikiServices::getInstance()->getWikiPageFactory(); |
| 85 | foreach ( $res as $row ) { |
| 86 | $queryPageId = $row->cbl_query_page_id; |
| 87 | if ( $queryPageId ) { |
| 88 | $page = $wikiPageFactory->newFromID( $queryPageId ); |
| 89 | if ( $page ) { |
| 90 | $page->doPurge(); |
| 91 | } |
| 92 | } |
| 93 | } |
| 94 | } |
| 95 | } |