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<?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' );
$this->includable( true );
}
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_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;
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( $res->numRows() == 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' ) );
return $extraOpts;
}
function setTopText( OutputPage $out, FormOptions $opts ) {
global $wgUser;
$skin = $wgUser->getSkin();
if( isset( $this->mTargetTitle ) && is_object( $this->mTargetTitle ) )
$out->setSubtitle( wfMsg( 'recentchangeslinked-backlink', $skin->link( $this->mTargetTitle,
$this->mTargetTitle->getPrefixedText(), array(), array( 'redirect' => 'no' ) ) ) );
}
function setBottomText( OutputPage $out, FormOptions $opts ){
if( isset( $this->mTargetTitle ) && is_object( $this->mTargetTitle ) ){
global $wgUser;
$out->setFeedAppendQuery( "target=" . urlencode( $this->mTargetTitle->getPrefixedDBkey() ) );
}
if( isset( $this->mResultEmpty ) && $this->mResultEmpty ){
$out->addWikiMsg( 'recentchangeslinked-noresult' );
}
}
}
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