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<?php /** * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License along * with this program; if not, write to the Free Software Foundation, Inc., * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. * http://www.gnu.org/copyleft/gpl.html * * @file */ namespace MediaWiki\Specials; use MediaWiki\ChangeTags\ChangeTagsStore; use MediaWiki\Html\FormOptions; use MediaWiki\Html\Html; use MediaWiki\MainConfigNames; use MediaWiki\Title\Title; use MediaWiki\User\Options\UserOptionsLookup; use MediaWiki\User\TempUser\TempUserConfig; use MediaWiki\User\UserIdentityUtils; use MediaWiki\Watchlist\WatchedItemStoreInterface; use MediaWiki\Xml\Xml; use MessageCache; use RecentChange; use SearchEngineFactory; use Wikimedia\Rdbms\SelectQueryBuilder; use Wikimedia\Rdbms\Subquery; /** * This is to display changes made to all articles linked in an article. * * @ingroup RecentChanges * @ingroup SpecialPage */ class SpecialRecentChangesLinked extends SpecialRecentChanges { /** @var bool|Title */ protected $rclTargetTitle; private SearchEngineFactory $searchEngineFactory; private ChangeTagsStore $changeTagsStore; /** * @param WatchedItemStoreInterface $watchedItemStore * @param MessageCache $messageCache * @param UserOptionsLookup $userOptionsLookup * @param SearchEngineFactory $searchEngineFactory */ public function __construct( WatchedItemStoreInterface $watchedItemStore, MessageCache $messageCache, UserOptionsLookup $userOptionsLookup, SearchEngineFactory $searchEngineFactory, ChangeTagsStore $changeTagsStore, UserIdentityUtils $userIdentityUtils, TempUserConfig $tempUserConfig ) { parent::__construct( $watchedItemStore, $messageCache, $userOptionsLookup, $changeTagsStore, $userIdentityUtils, $tempUserConfig ); $this->mName = 'Recentchangeslinked'; $this->searchEngineFactory = $searchEngineFactory; $this->changeTagsStore = $changeTagsStore; } public function getDefaultOptions() { $opts = parent::getDefaultOptions(); $opts->add( 'target', '' ); $opts->add( 'showlinkedto', false ); return $opts; } public function parseParameters( $par, FormOptions $opts ) { $opts['target'] = $par; } /** * FIXME: Port useful changes from SpecialRecentChanges * * @inheritDoc */ protected function doMainQuery( $tables, $select, $conds, $query_options, $join_conds, FormOptions $opts ) { $target = $opts['target']; $showlinkedto = $opts['showlinkedto']; $limit = $opts['limit']; if ( $target === '' ) { return false; } $outputPage = $this->getOutput(); $title = Title::newFromText( $target ); if ( !$title || $title->isExternal() ) { $outputPage->addHTML( Html::errorBox( $this->msg( 'allpagesbadtitle' )->parse(), '', 'mw-recentchangeslinked-errorbox' ) ); return false; } $outputPage->setPageTitleMsg( $this->msg( 'recentchangeslinked-title' )->plaintextParams( $title->getPrefixedText() ) ); /* * Ordinary links are in the pagelinks table, while transclusions are * in the templatelinks table, categorizations in categorylinks and * image use in imagelinks. We need to somehow combine all these. * Special:Whatlinkshere does this by firing multiple queries and * merging the results, but the code we inherit from our parent class * expects only one result set so we use UNION instead. */ $dbr = $this->getDB(); $id = $title->getArticleID(); $ns = $title->getNamespace(); $dbkey = $title->getDBkey(); $rcQuery = RecentChange::getQueryInfo(); $tables = array_unique( array_merge( $rcQuery['tables'], $tables ) ); $select = array_unique( array_merge( $rcQuery['fields'], $select ) ); $join_conds = array_merge( $rcQuery['joins'], $join_conds ); // Join with watchlist and watchlist_expiry tables to highlight watched rows. $this->addWatchlistJoins( $dbr, $tables, $select, $join_conds, $conds ); // JOIN on page, used for 'last revision' filter highlight $tables[] = 'page'; $join_conds['page'] = [ 'LEFT JOIN', 'rc_cur_id=page_id' ]; $select[] = 'page_latest'; $tagFilter = $opts['tagfilter'] !== '' ? explode( '|', $opts['tagfilter'] ) : []; $this->changeTagsStore->modifyDisplayQuery( $tables, $select, $conds, $join_conds, $query_options, $tagFilter, $opts['inverttags'] ); if ( $dbr->unionSupportsOrderAndLimit() ) { if ( in_array( 'DISTINCT', $query_options ) ) { // ChangeTagsStore::modifyDisplayQuery() will have added DISTINCT. // To prevent this from causing query performance problems, we need to add // a GROUP BY, and add rc_id to the ORDER BY. $order = [ 'GROUP BY' => [ 'rc_timestamp', 'rc_id' ], 'ORDER BY' => [ 'rc_timestamp DESC', 'rc_id DESC' ] ]; } else { $order = [ 'ORDER BY' => 'rc_timestamp DESC' ]; } } else { $order = []; } if ( !$this->runMainQueryHook( $tables, $select, $conds, $query_options, $join_conds, $opts ) ) { return false; } if ( $ns === NS_CATEGORY && !$showlinkedto ) { // special handling for categories // XXX: should try to make this less kludgy $link_tables = [ 'categorylinks' ]; $showlinkedto = true; } else { // for now, always join on these tables; really should be configurable as in whatlinkshere $link_tables = [ 'pagelinks', 'templatelinks' ]; // imagelinks only contains links to pages in NS_FILE if ( $ns === NS_FILE || !$showlinkedto ) { $link_tables[] = 'imagelinks'; } } if ( $id == 0 && !$showlinkedto ) { return false; // nonexistent pages can't link to any pages } // field name prefixes for all the various tables we might want to join with $prefix = [ 'pagelinks' => 'pl', 'templatelinks' => 'tl', 'categorylinks' => 'cl', 'imagelinks' => 'il' ]; $subsql = []; // SELECT statements to combine with UNION foreach ( $link_tables as $link_table ) { $queryBuilder = $dbr->newSelectQueryBuilder(); $linksMigration = \MediaWiki\MediaWikiServices::getInstance()->getLinksMigration(); $queryBuilder = $queryBuilder ->tables( $tables ) ->fields( $select ) ->where( $conds ) ->caller( __METHOD__ ) ->options( $order + $query_options ) ->joinConds( $join_conds ); $pfx = $prefix[$link_table]; // imagelinks and categorylinks tables have no xx_namespace field, // and have xx_to instead of xx_title if ( $link_table == 'imagelinks' ) { $link_ns = NS_FILE; } elseif ( $link_table == 'categorylinks' ) { $link_ns = NS_CATEGORY; } else { $link_ns = 0; } if ( $showlinkedto ) { // find changes to pages linking to this page if ( $link_ns ) { if ( $ns != $link_ns ) { continue; } // should never happen, but check anyway $queryBuilder->where( [ "{$pfx}_to" => $dbkey ] ); } else { if ( isset( $linksMigration::$mapping[$link_table] ) ) { $queryBuilder->where( $linksMigration->getLinksConditions( $link_table, $title ) ); } else { $queryBuilder->where( [ "{$pfx}_namespace" => $ns, "{$pfx}_title" => $dbkey ] ); } } $queryBuilder->join( $link_table, null, "rc_cur_id = {$pfx}_from" ); } else { // find changes to pages linked from this page $queryBuilder->where( [ "{$pfx}_from" => $id ] ); if ( $link_table == 'imagelinks' || $link_table == 'categorylinks' ) { $queryBuilder->where( [ "rc_namespace" => $link_ns ] ); $queryBuilder->join( $link_table, null, "rc_title = {$pfx}_to" ); } else { // TODO: Move this to LinksMigration if ( isset( $linksMigration::$mapping[$link_table] ) ) { $queryInfo = $linksMigration->getQueryInfo( $link_table, $link_table ); [ $nsField, $titleField ] = $linksMigration->getTitleFields( $link_table ); if ( in_array( 'linktarget', $queryInfo['tables'] ) ) { $joinTable = 'linktarget'; } else { $joinTable = $link_table; } $queryBuilder->join( $joinTable, null, [ "rc_namespace = {$nsField}", "rc_title = {$titleField}" ] ); if ( in_array( 'linktarget', $queryInfo['tables'] ) ) { $queryBuilder->joinConds( $queryInfo['joins'] ); $queryBuilder->table( $link_table ); } } else { $queryBuilder->join( $link_table, null, [ "rc_namespace = {$pfx}_namespace", "rc_title = {$pfx}_title" ] ); } } } if ( $dbr->unionSupportsOrderAndLimit() ) { $queryBuilder->limit( $limit ); } $subsql[] = $queryBuilder; } if ( count( $subsql ) == 0 ) { return false; // should never happen } if ( count( $subsql ) == 1 && $dbr->unionSupportsOrderAndLimit() ) { return $subsql[0] ->setMaxExecutionTime( $this->getConfig()->get( MainConfigNames::MaxExecutionTimeForExpensiveQueries ) ) ->caller( __METHOD__ )->fetchResultSet(); } else { $unionQueryBuilder = $dbr->newUnionQueryBuilder()->caller( __METHOD__ ); foreach ( $subsql as $selectQueryBuilder ) { $unionQueryBuilder->add( $selectQueryBuilder ); } return $dbr->newSelectQueryBuilder() ->select( '*' ) ->from( new Subquery( $unionQueryBuilder->getSQL() ), 'main' ) ->orderBy( 'rc_timestamp', SelectQueryBuilder::SORT_DESC ) ->setMaxExecutionTime( $this->getConfig()->get( MainConfigNames::MaxExecutionTimeForExpensiveQueries ) ) ->limit( $limit ) ->caller( __METHOD__ )->fetchResultSet(); } } public function setTopText( FormOptions $opts ) { $target = $this->getTargetTitle(); if ( $target ) { $this->getOutput()->addBacklinkSubtitle( $target ); $this->getSkin()->setRelevantTitle( $target ); } } /** * Get options to be displayed in a form * * @param FormOptions $opts * @return array */ public function getExtraOptions( $opts ) { $extraOpts = parent::getExtraOptions( $opts ); $opts->consumeValues( [ 'showlinkedto', 'target' ] ); $extraOpts['target'] = [ $this->msg( 'recentchangeslinked-page' )->escaped(), Xml::input( 'target', 40, str_replace( '_', ' ', $opts['target'] ) ) . ' ' . Xml::check( 'showlinkedto', $opts['showlinkedto'], [ 'id' => 'showlinkedto' ] ) . ' ' . Xml::label( $this->msg( 'recentchangeslinked-to' )->text(), 'showlinkedto' ) ]; $this->addHelpLink( 'Help:Related changes' ); return $extraOpts; } /** * @return Title */ private function getTargetTitle() { if ( $this->rclTargetTitle === null ) { $opts = $this->getOptions(); if ( isset( $opts['target'] ) && $opts['target'] !== '' ) { $this->rclTargetTitle = Title::newFromText( $opts['target'] ); } else { $this->rclTargetTitle = false; } } return $this->rclTargetTitle; } /** * Return an array of subpages beginning with $search that this special page will accept. * * @param string $search Prefix to search for * @param int $limit Maximum number of results to return (usually 10) * @param int $offset Number of results to skip (usually 0) * @return string[] Matching subpages */ public function prefixSearchSubpages( $search, $limit, $offset ) { return $this->prefixSearchString( $search, $limit, $offset, $this->searchEngineFactory ); } protected function outputNoResults() { $targetTitle = $this->getTargetTitle(); if ( $targetTitle === false ) { $this->getOutput()->addHTML( Html::rawElement( 'div', [ 'class' => 'mw-changeslist-empty mw-changeslist-notargetpage' ], $this->msg( 'recentchanges-notargetpage' )->parse() ) ); } elseif ( !$targetTitle || $targetTitle->isExternal() ) { $this->getOutput()->addHTML( Html::rawElement( 'div', [ 'class' => 'mw-changeslist-empty mw-changeslist-invalidtargetpage' ], $this->msg( 'allpagesbadtitle' )->parse() ) ); } else { parent::outputNoResults(); } } } /** * Retain the old class name for backwards compatibility. * @deprecated since 1.41 */ class_alias( SpecialRecentChangesLinked::class, 'SpecialRecentChangesLinked' );
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