- global $wgContLang;
-
- // Get the last revision
- $rev = $this->getRevision();
-
- if ( is_null( $rev ) ) {
- return false;
- }
-
- // Get the article's contents
- $contents = $rev->getText();
- $blank = false;
-
- // If the page is blank, use the text from the previous revision,
- // which can only be blank if there's a move/import/protect dummy revision involved
- if ( $contents == '' ) {
- $prev = $rev->getPrevious();
-
- if ( $prev ) {
- $contents = $prev->getText();
- $blank = true;
- }
- }
-
- $dbw = wfGetDB( DB_MASTER );
-
- // Find out if there was only one contributor
- // Only scan the last 20 revisions
- $res = $dbw->select( 'revision', 'rev_user_text',
- array( 'rev_page' => $this->getID(), $dbw->bitAnd( 'rev_deleted', Revision::DELETED_USER ) . ' = 0' ),
- __METHOD__,
- array( 'LIMIT' => 20 )
- );
-
- if ( $res === false ) {
- // This page has no revisions, which is very weird
- return false;
- }
-
- $hasHistory = ( $res->numRows() > 1 );
- $row = $dbw->fetchObject( $res );
-
- if ( $row ) { // $row is false if the only contributor is hidden
- $onlyAuthor = $row->rev_user_text;
- // Try to find a second contributor
- foreach ( $res as $row ) {
- if ( $row->rev_user_text != $onlyAuthor ) { // Bug 22999
- $onlyAuthor = false;
- break;
- }
- }
- } else {
- $onlyAuthor = false;
- }
-
- // Generate the summary with a '$1' placeholder
- if ( $blank ) {
- // The current revision is blank and the one before is also
- // blank. It's just not our lucky day
- $reason = wfMsgForContent( 'exbeforeblank', '$1' );
- } else {
- if ( $onlyAuthor ) {
- $reason = wfMsgForContent( 'excontentauthor', '$1', $onlyAuthor );
- } else {
- $reason = wfMsgForContent( 'excontent', '$1' );
- }
- }
-
- if ( $reason == '-' ) {
- // Allow these UI messages to be blanked out cleanly
- return '';
- }
-
- // Replace newlines with spaces to prevent uglyness
- $contents = preg_replace( "/[\n\r]/", ' ', $contents );
- // Calculate the maximum amount of chars to get
- // Max content length = max comment length - length of the comment (excl. $1)
- $maxLength = 255 - ( strlen( $reason ) - 2 );
- $contents = $wgContLang->truncate( $contents, $maxLength );
- // Remove possible unfinished links
- $contents = preg_replace( '/\[\[([^\]]*)\]?$/', '$1', $contents );
- // Now replace the '$1' placeholder
- $reason = str_replace( '$1', $contents, $reason );
-
- return $reason;