" * @param $redirTitle Title: the title which has changed, redirects pointing to this title are fixed * @param $destTitle bool Not used */ public static function fixRedirects( $reason, $redirTitle, $destTitle = false ) { # Need to use the master to get the redirect table updated in the same transaction $dbw = wfGetDB( DB_MASTER ); $res = $dbw->select( array( 'redirect', 'page' ), array( 'page_namespace', 'page_title' ), array( 'page_id = rd_from', 'rd_namespace' => $redirTitle->getNamespace(), 'rd_title' => $redirTitle->getDBkey() ), __METHOD__ ); if ( !$res->numRows() ) { return; } $jobs = array(); foreach ( $res as $row ) { $title = Title::makeTitle( $row->page_namespace, $row->page_title ); if ( !$title ) { continue; } $jobs[] = new self( $title, array( 'reason' => $reason, 'redirTitle' => $redirTitle->getPrefixedDBkey() ) ); # Avoid excessive memory usage if ( count( $jobs ) > 10000 ) { Job::batchInsert( $jobs ); $jobs = array(); } } Job::batchInsert( $jobs ); } function __construct( $title, $params = false, $id = 0 ) { parent::__construct( 'fixDoubleRedirect', $title, $params, $id ); $this->reason = $params['reason']; $this->redirTitle = Title::newFromText( $params['redirTitle'] ); $this->destTitleText = !empty( $params['destTitle'] ) ? $params['destTitle'] : ''; } /** * @return bool */ function run() { if ( !$this->redirTitle ) { $this->setLastError( 'Invalid title' ); return false; } $targetRev = Revision::newFromTitle( $this->title, false, Revision::READ_LATEST ); if ( !$targetRev ) { wfDebug( __METHOD__.": target redirect already deleted, ignoring\n" ); return true; } $text = $targetRev->getText(); $currentDest = Title::newFromRedirect( $text ); if ( !$currentDest || !$currentDest->equals( $this->redirTitle ) ) { wfDebug( __METHOD__.": Redirect has changed since the job was queued\n" ); return true; } # Check for a suppression tag (used e.g. in periodically archived discussions) $mw = MagicWord::get( 'staticredirect' ); if ( $mw->match( $text ) ) { wfDebug( __METHOD__.": skipping: suppressed with __STATICREDIRECT__\n" ); return true; } # Find the current final destination $newTitle = self::getFinalDestination( $this->redirTitle ); if ( !$newTitle ) { wfDebug( __METHOD__.": skipping: single redirect, circular redirect or invalid redirect destination\n" ); return true; } if ( $newTitle->equals( $this->redirTitle ) ) { # The redirect is already right, no need to change it # This can happen if the page was moved back (say after vandalism) wfDebug( __METHOD__.": skipping, already good\n" ); } # Preserve fragment (bug 14904) $newTitle = Title::makeTitle( $newTitle->getNamespace(), $newTitle->getDBkey(), $currentDest->getFragment() ); # Fix the text # Remember that redirect pages can have categories, templates, etc., # so the regex has to be fairly general $newText = preg_replace( '/ \[ \[ [^\]]* \] \] /x', '[[' . $newTitle->getFullText() . ']]', $text, 1 ); if ( $newText === $text ) { $this->setLastError( 'Text unchanged???' ); return false; } # Save it global $wgUser; $oldUser = $wgUser; $wgUser = $this->getUser(); $article = WikiPage::factory( $this->title ); $reason = wfMessage( 'double-redirect-fixed-' . $this->reason, $this->redirTitle->getPrefixedText(), $newTitle->getPrefixedText() )->inContentLanguage()->text(); $article->doEdit( $newText, $reason, EDIT_UPDATE | EDIT_SUPPRESS_RC, false, $this->getUser() ); $wgUser = $oldUser; return true; } /** * Get the final destination of a redirect * * @param $title Title * * @return bool if the specified title is not a redirect, or if it is a circular redirect */ public static function getFinalDestination( $title ) { $dbw = wfGetDB( DB_MASTER ); $seenTitles = array(); # Circular redirect check $dest = false; while ( true ) { $titleText = $title->getPrefixedDBkey(); if ( isset( $seenTitles[$titleText] ) ) { wfDebug( __METHOD__, "Circular redirect detected, aborting\n" ); return false; } $seenTitles[$titleText] = true; $row = $dbw->selectRow( array( 'redirect', 'page' ), array( 'rd_namespace', 'rd_title' ), array( 'rd_from=page_id', 'page_namespace' => $title->getNamespace(), 'page_title' => $title->getDBkey() ), __METHOD__ ); if ( !$row ) { # No redirect from here, chain terminates break; } else { $dest = $title = Title::makeTitle( $row->rd_namespace, $row->rd_title ); } } return $dest; } /** * Get a user object for doing edits, from a request-lifetime cache * @return User */ function getUser() { if ( !self::$user ) { self::$user = User::newFromName( wfMessage( 'double-redirect-fixer' )->inContentLanguage()->text(), false ); # FIXME: newFromName could return false on a badly configured wiki. if ( !self::$user->isLoggedIn() ) { self::$user->addToDatabase(); } } return self::$user; } }