diff options
Diffstat (limited to 'includes/specials/SpecialRecentchangeslinked.php')
| -rw-r--r-- | includes/specials/SpecialRecentchangeslinked.php | 178 |
1 files changed, 178 insertions, 0 deletions
diff --git a/includes/specials/SpecialRecentchangeslinked.php b/includes/specials/SpecialRecentchangeslinked.php new file mode 100644 index 00000000..d773fb77 --- /dev/null +++ b/includes/specials/SpecialRecentchangeslinked.php @@ -0,0 +1,178 @@ +<?php + +/** + * This is to display changes made to all articles linked in an article. + * @ingroup SpecialPage + */ +class SpecialRecentchangeslinked extends SpecialRecentchanges { + + function __construct(){ + SpecialPage::SpecialPage( 'Recentchangeslinked' ); + } + + public function getDefaultOptions() { + $opts = parent::getDefaultOptions(); + $opts->add( 'target', '' ); + $opts->add( 'showlinkedto', false ); + return $opts; + } + + public function parseParameters( $par, FormOptions $opts ) { + $opts['target'] = $par; + } + + public function feedSetup(){ + global $wgRequest; + $opts = parent::feedSetup(); + $opts['target'] = $wgRequest->getVal( 'target' ); + return $opts; + } + + public function getFeedObject( $feedFormat ){ + $feed = new ChangesFeed( $feedFormat, false ); + $feedObj = $feed->getFeedObject( + wfMsgForContent( 'recentchangeslinked-title', $this->mTargetTitle->getPrefixedText() ), + wfMsgForContent( 'recentchangeslinked' ) + ); + return array( $feed, $feedObj ); + } + + public function doMainQuery( $conds, $opts ) { + global $wgUser, $wgOut; + + $target = $opts['target']; + $showlinkedto = $opts['showlinkedto']; + $limit = $opts['limit']; + + if ( $target === '' ) { + return false; + } + $title = Title::newFromURL( $target ); + if( !$title || $title->getInterwiki() != '' ){ + $wgOut->wrapWikiMsg( '<div class="errorbox">$1</div><br clear="both" />', 'allpagesbadtitle' ); + return false; + } + $this->mTargetTitle = $title; + + $wgOut->setPageTitle( wfMsg( '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 = array( $dbr->tableName( 'recentchanges' ) . '.*' ); + $join_conds = array(); + + // left join with watchlist table to highlight watched rows + if( $uid = $wgUser->getId() ) { + $tables[] = 'watchlist'; + $select[] = 'wl_user'; + $join_conds['watchlist'] = array( 'LEFT JOIN', "wl_user={$uid} AND wl_title=rc_title AND wl_namespace=rc_namespace" ); + } + + // XXX: parent class does this, should we too? + // wfRunHooks('SpecialRecentChangesQuery', array( &$conds, &$tables, &$join_conds, $opts ) ); + + if( $ns == NS_CATEGORY && !$showlinkedto ) { + // special handling for categories + // XXX: should try to make this less klugy + $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_IMAGE + if( $ns == NS_IMAGE || !$showlinkedto ) $link_tables[] = 'imagelinks'; + } + + // 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_IMAGE; + else if( $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 { + $subjoin = "rc_namespace = {$pfx}_namespace AND rc_title = {$pfx}_title"; + } + } + + $subsql[] = $dbr->selectSQLText( array_merge( $tables, array( $link_table ) ), $select, $conds + $subconds, + __METHOD__, array( 'ORDER BY' => 'rc_timestamp DESC', 'LIMIT' => $limit ), + $join_conds + array( $link_table => array( 'INNER JOIN', $subjoin ) ) ); + } + + if( count($subsql) == 0 ) + return false; // should never happen + if( count($subsql) == 1 ) + $sql = $subsql[0]; + else { + // need to resort and relimit after union + $sql = "(" . implode( ") UNION (", $subsql ) . ") ORDER BY rc_timestamp DESC LIMIT {$limit}"; + } + + $res = $dbr->query( $sql, __METHOD__ ); + + if( $dbr->numRows( $res ) == 0 ) + $this->mResultEmpty = true; + + return $res; + } + + function getExtraOptions( $opts ){ + $opts->consumeValues( array( 'showlinkedto', 'target' ) ); + $extraOpts = array(); + $extraOpts['namespace'] = $this->namespaceFilterForm( $opts ); + $extraOpts['target'] = array( wfMsg( 'recentchangeslinked-page' ), + Xml::input( 'target', 40, str_replace('_',' ',$opts['target']) ) . + Xml::check( 'showlinkedto', $opts['showlinkedto'], array('id' => 'showlinkedto') ) . ' ' . + Xml::label( wfMsg("recentchangeslinked-to"), 'showlinkedto' ) ); + $extraOpts['submit'] = Xml::submitbutton( wfMsg('allpagessubmit') ); + return $extraOpts; + } + + function setTopText( &$out, $opts ){} + + function setBottomText( &$out, $opts ){ + if( isset( $this->mTargetTitle ) && is_object( $this->mTargetTitle ) ){ + global $wgUser; + $out->setFeedAppendQuery( "target=" . urlencode( $this->mTargetTitle->getPrefixedDBkey() ) ); + $out->addHTML("< ".$wgUser->getSkin()->makeLinkObj( $this->mTargetTitle, "", "redirect=no" )."<hr />\n"); + } + if( isset( $this->mResultEmpty ) && $this->mResultEmpty ){ + $out->addWikiMsg( 'recentchangeslinked-noresult' ); + } + } +} |