PageHistory.php

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<?php

/* Page history
   Split off from Article.php and Skin.php, 2003-12-22
*/

class PageHistory {
        var $mArticle, $mTitle, $mSkin;
        var $lastline, $lastdate;
        var $linesonpage;
        function PageHistory( $article ) {
                $this->mArticle =& $article;
                $this->mTitle =& $article->mTitle;
        }
        
        # This shares a lot of issues (and code) with Recent Changes

        function history()
        {
                global $wgUser, $wgOut, $wgLang, $wgIsMySQL, $wgIsPg;

                # If page hasn't changed, client can cache this
                
                if( $wgOut->checkLastModified( $this->mArticle->getTimestamp() ) ){
                        # Client cache fresh and headers sent, nothing more to do.
                        return;
                }
                $fname = "PageHistory::history";
                wfProfileIn( $fname );

                $wgOut->setPageTitle( $this->mTitle->getPRefixedText() );
                $wgOut->setSubtitle( wfMsg( "revhistory" ) );
                $wgOut->setArticleFlag( false );
                $wgOut->setArticleRelated( true );
                $wgOut->setRobotpolicy( "noindex,nofollow" );

                if( $this->mTitle->getArticleID() == 0 ) {
                        $wgOut->addHTML( wfMsg( "nohistory" ) );
                        wfProfileOut( $fname );
                        return;
                }
                
                list( $limit, $offset ) = wfCheckLimits();
                
                /* We have to draw the latest revision from 'cur' */
                $rawlimit = $limit;
                $rawoffset = $offset - 1;
                if( 0 == $offset ) {
                        $rawlimit--;
                        $rawoffset = 0;
                }
                /* Check one extra row to see whether we need to show 'next' and diff links */
                $limitplus = $rawlimit + 1;
                
                $namespace = $this->mTitle->getNamespace();
                $title = $this->mTitle->getText();
                $use_index=$wgIsMySQL?"USE INDEX (name_title_timestamp)":"";
                $oldtable=$wgIsPg?'"old"':'old';
                $sql = "SELECT old_id,old_user," .
                  "old_comment,old_user_text,old_timestamp,old_minor_edit ".
                  "FROM $oldtable $use_index " .
                  "WHERE old_namespace={$namespace} AND " .
                  "old_title='" . wfStrencode( $this->mTitle->getDBkey() ) . "' " .
                  "ORDER BY inverse_timestamp".wfLimitResult($limitplus,$rawoffset);
                $res = wfQuery( $sql, DB_READ, $fname );

                $revs = wfNumRows( $res );
                
                if( $revs < $limitplus ) // the sql above tries to fetch one extra
                        $this->linesonpage = $revs;
                else
                        $this->linesonpage = $revs - 1;

                $atend = ($revs < $limitplus);
                
                $this->mSkin = $wgUser->getSkin();
                $numbar = wfViewPrevNext(
                        $offset, $limit,
                        $this->mTitle->getPrefixedText(),
                        "action=history", $atend );
                $s = $numbar;
                if($this->linesonpage > 0) {
                        $submitpart1 = '<input class="historysubmit" type="submit" accesskey="'.wfMsg('accesskey-compareselectedversions').
                        '" title="'.wfMsg('tooltip-compareselectedversions').'" value="'.wfMsg('compareselectedversions').'"';
                        $this->submitbuttonhtml1 = $submitpart1 . ' />';
                        $this->submitbuttonhtml2 = $submitpart1 . ' id="historysubmit" />';
                }
                $s .= $this->beginHistoryList();
                $counter = 1;
                if( $offset == 0 ){
                        $this->linesonpage++;
                        $s .= $this->historyLine( 
                                $this->mArticle->getTimestamp(), 
                                $this->mArticle->getUser(),
                                $this->mArticle->getUserText(), $namespace,
                                $title, 0, $this->mArticle->getComment(),
                                ( $this->mArticle->getMinorEdit() > 0 ),
                                $counter++
                        );
                }
                while ( $line = wfFetchObject( $res ) ) {
                        $s .= $this->historyLine( 
                                $line->old_timestamp, $line->old_user,
                                $line->old_user_text, $namespace,
                                $title, $line->old_id,
                                $line->old_comment, ( $line->old_minor_edit > 0 ),
                                $counter++
                        );
                }
                $s .= $this->endHistoryList( !$atend );
                $s .= $numbar;
                $wgOut->addHTML( $s );
                wfProfileOut( $fname );
        }

        function beginHistoryList()
        {
                global $wgTitle;
                $this->lastdate = $this->lastline = "";
                $s = "\n<p>" . wfMsg( "histlegend" ).'</p>'; 
                $s .="\n<form action=\"" . $wgTitle->escapeLocalURL( '-' ) . "\" method=\"get\">";
                $s .= "<input type=\"hidden\" name=\"title\" value=\"".wfEscapeHTML($wgTitle->getPrefixedDbKey())."\"/>\n";
                $s .= !empty($this->submitbuttonhtml1) ? $this->submitbuttonhtml1."\n":'';
                $s .= "" . "\n<ul id=\"pagehistory\" >";
                return $s;
        }

        function endHistoryList( $skip = false )
        {
                $last = wfMsg( "last" );

                $s = $skip ? "" : preg_replace( "/!OLDID![0-9]+!/", $last, $this->lastline );
                $s .= "</ul>";
                $s .= !empty($this->submitbuttonhtml2) ? $this->submitbuttonhtml2."\n":'';
                $s .= "</form>\n";
                return $s;
        }

        function historyLine( $ts, $u, $ut, $ns, $ttl, $oid, $c, $isminor, $counter = '' )
        {
                global $wgLang;

                $artname = Title::makeName( $ns, $ttl );
                $last = wfMsg( "last" );
                $cur = wfMsg( "cur" );
                $cr = wfMsg( "currentrev" );

                if ( $oid && $this->lastline ) {
                        $ret = preg_replace( "/!OLDID!([0-9]+)!/", $this->mSkin->makeKnownLink(
                          $artname, $last, "diff=\\1&oldid={$oid}",'' ,'' ,' tabindex="'.$counter.'"' ), $this->lastline );
                } else {
                        $ret = "";
                }
                $dt = $wgLang->timeanddate( $ts, true );

                if ( $oid ) {
                        $q = "oldid={$oid}";
                } else {
                        $q = "";
                }
                $link = $this->mSkin->makeKnownLink( $artname, $dt, $q );

                if ( 0 == $u ) {
                        $ul = $this->mSkin->makeKnownLink( $wgLang->specialPage( "Contributions" ),
                                $ut, "target=" . $ut );
                } else { 
                        $ul = $this->mSkin->makeLink( $wgLang->getNsText(
                                Namespace::getUser() ) . ":{$ut}", $ut );
                }

                $s = "<li>";
                if ( $oid ) {
                        $curlink = $this->mSkin->makeKnownLink( $artname, $cur,
                          "diff=0&oldid={$oid}" );
                } else {
                        $curlink = $cur;
                }
                $arbitrary = "";
                if( $this->linesonpage > 1) {
                        # XXX: move title texts to javascript
                        $checkmark = "";
                        if ( !$oid ) {
                                $arbitrary = '<input type="radio" style="visibility:hidden" name="oldid" value="'.$oid.'" title="'.wfMsg('selectolderversionfordiff').'" />';
                                $checkmark = ' checked="checked"';
                        } else {
                                if( $counter == 2 ) $checkmark = ' checked="checked"';
                                $arbitrary = '<input type="radio" name="oldid" value="'.$oid.'" title="'.wfMsg('selectolderversionfordiff').'"'.$checkmark.' />';
                                $checkmark = '';
                        }
                        $arbitrary .= '<input type="radio" name="diff" value="'.$oid.'" title="'.wfMsg('selectnewerversionfordiff').'"'.$checkmark.' />';
                }
                $s .= "({$curlink}) (!OLDID!{$oid}!) $arbitrary {$link} <span class='user'>{$ul}</span>";
                $s .= $isminor ? ' <span class="minor">'.wfMsg( "minoreditletter" ).'</span>': '' ;
                

                if ( "" != $c && "*" != $c ) {

                        $c = $this->mSkin->formatcomment($c);
                        $s .= " <em>(" . $c . ")</em>";
                }
                $s .= "</li>\n";

                $this->lastline = $s;
                return $ret;
        }

}

?>

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