add( 'target', '' ); $opts->add( 'showlinkedto', false ); return $opts; } public function parseParameters( $par, FormOptions $opts ) { $opts['target'] = $par; } public function doMainQuery( $conds, $opts ) { $target = $opts['target']; $showlinkedto = $opts['showlinkedto']; $limit = $opts['limit']; if ( $target === '' ) { return false; } $outputPage = $this->getOutput(); $title = Title::newFromURL( $target ); if ( !$title || $title->isExternal() ) { $outputPage->addHtml( '

' . $this->msg( 'allpagesbadtitle' ) ->parse() . '

' ); return false; } $outputPage->setPageTitle( $this->msg( 'recentchangeslinked-title', $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 = wfGetDB( DB_SLAVE, 'recentchangeslinked' ); $id = $title->getArticleID(); $ns = $title->getNamespace(); $dbkey = $title->getDBkey(); $tables = array( 'recentchanges' ); $select = RecentChange::selectFields(); $join_conds = array(); $query_options = array(); // left join with watchlist table to highlight watched rows $uid = $this->getUser()->getId(); if ( $uid && $this->getUser()->isAllowed( 'viewmywatchlist' ) ) { $tables[] = 'watchlist'; $select[] = 'wl_user'; $join_conds['watchlist'] = array( 'LEFT JOIN', array( 'wl_user' => $uid, 'wl_title=rc_title', 'wl_namespace=rc_namespace' ) ); } if ( $this->getUser()->isAllowed( 'rollback' ) ) { $tables[] = 'page'; $join_conds['page'] = array( 'LEFT JOIN', 'rc_cur_id=page_id' ); $select[] = 'page_latest'; } ChangeTags::modifyDisplayQuery( $tables, $select, $conds, $join_conds, $query_options, $opts['tagfilter'] ); if ( !$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 = array( 'categorylinks' ); $showlinkedto = true; } else { // for now, always join on these tables; really should be configurable as in whatlinkshere $link_tables = array( '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 = array( 'pagelinks' => 'pl', 'templatelinks' => 'tl', 'categorylinks' => 'cl', 'imagelinks' => 'il' ); $subsql = array(); // SELECT statements to combine with UNION foreach ( $link_tables as $link_table ) { $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 $subconds = array( "{$pfx}_to" => $dbkey ); } else { $subconds = array( "{$pfx}_namespace" => $ns, "{$pfx}_title" => $dbkey ); } $subjoin = "rc_cur_id = {$pfx}_from"; } else { // find changes to pages linked from this page $subconds = array( "{$pfx}_from" => $id ); if ( $link_table == 'imagelinks' || $link_table == 'categorylinks' ) { $subconds["rc_namespace"] = $link_ns; $subjoin = "rc_title = {$pfx}_to"; } else { $subjoin = array( "rc_namespace = {$pfx}_namespace", "rc_title = {$pfx}_title" ); } } if ( $dbr->unionSupportsOrderAndLimit() ) { $order = array( 'ORDER BY' => 'rc_timestamp DESC' ); } else { $order = array(); } $query = $dbr->selectSQLText( array_merge( $tables, array( $link_table ) ), $select, $conds + $subconds, __METHOD__, $order + $query_options, $join_conds + array( $link_table => array( 'INNER JOIN', $subjoin ) ) ); if ( $dbr->unionSupportsOrderAndLimit() ) { $query = $dbr->limitResult( $query, $limit ); } $subsql[] = $query; } if ( count( $subsql ) == 0 ) { return false; // should never happen } if ( count( $subsql ) == 1 && $dbr->unionSupportsOrderAndLimit() ) { $sql = $subsql[0]; } else { // need to resort and relimit after union $sql = $dbr->unionQueries( $subsql, false ) . ' ORDER BY rc_timestamp DESC'; $sql = $dbr->limitResult( $sql, $limit, false ); } $res = $dbr->query( $sql, __METHOD__ ); if ( $res->numRows() == 0 ) { $this->mResultEmpty = true; } return $res; } 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 */ function getExtraOptions( $opts ) { $extraOpts = parent::getExtraOptions( $opts ); $opts->consumeValues( array( 'showlinkedto', 'target' ) ); $extraOpts['target'] = array( $this->msg( 'recentchangeslinked-page' )->escaped(), Xml::input( 'target', 40, str_replace( '_', ' ', $opts['target'] ) ) . Xml::check( 'showlinkedto', $opts['showlinkedto'], array( 'id' => 'showlinkedto' ) ) . ' ' . Xml::label( $this->msg( 'recentchangeslinked-to' )->text(), 'showlinkedto' ) ); $this->addHelpLink( 'Help:Related changes' ); return $extraOpts; } /** * @return Title */ 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; } }