Fix tag nesting
[lhc/web/wiklou.git] / includes / EditPage.php
index 48a2691..5cc8f1e 100644 (file)
@@ -1,4 +1,4 @@
-<?
+<?php
 
 # Splitting edit page/HTML interface from Article...
 # The actual database and text munging is still in Article,
@@ -9,6 +9,13 @@ class EditPage {
        var $mArticle;
        var $mTitle;
        
+       # Form values
+       var $save = false, $preview = false;
+       var $minoredit = false, $watchthis = false;
+       var $textbox1 = "", $textbox2 = "", $summary = "";
+       var $edittime = "", $section = "";
+       var $oldid = 0;
+       
        function EditPage( $article ) {
                $this->mArticle =& $article;
                global $wgTitle;
@@ -19,15 +26,14 @@ class EditPage {
 
        function edit()
        {
-               global $wgOut, $wgUser, $wgWhitelistEdit;
-               global $wpTextbox1, $wpSummary, $wpSave, $wpPreview;
-               global $wpMinoredit, $wpEdittime, $wpTextbox2;
+               global $wgOut, $wgUser, $wgWhitelistEdit, $wgRequest;
+               // this is not an article
+               $wgOut->setArticleFlag(false);
 
-               $fields = array( "wpTextbox1", "wpSummary", "wpTextbox2" );
-               wfCleanFormFields( $fields );
+               $this->importFormData( $wgRequest );
 
                if ( ! $this->mTitle->userCanEdit() ) {
-                       $this->mArticle->view();
+                       $wgOut->readOnlyPage( $this->mArticle->getContent(), true );
                        return;
                }
                if ( $wgUser->isBlocked() ) {
@@ -39,23 +45,44 @@ class EditPage {
                        return;
                }
                if ( wfReadOnly() ) {
-                       if( isset( $wpSave ) or isset( $wpPreview ) ) {
+                       if( $this->save || $this->preview ) {
                                $this->editForm( "preview" );
                        } else {
                                $wgOut->readOnlyPage( $this->mArticle->getContent() );
                        }
                        return;
                }
-               if ( $_SERVER['REQUEST_METHOD'] != "POST" ) unset( $wpSave );
-               if ( isset( $wpSave ) ) {
+               if ( $this->save ) {
                        $this->editForm( "save" );
-               } else if ( isset( $wpPreview ) ) {
+               } else if ( $this->preview ) {
                        $this->editForm( "preview" );
                } else { # First time through
                        $this->editForm( "initial" );
                }
        }
 
+       function importFormData( &$request ) {
+               # These fields need to be checked for encoding.
+               # Also remove trailing whitespace, but don't remove _initial_
+               # whitespace from the text boxes. This may be significant formatting.
+               $this->textbox1 = rtrim( $request->getText( "wpTextbox1" ) );
+               $this->textbox2 = rtrim( $request->getText( "wpTextbox2" ) );
+               $this->summary = trim( $request->getText( "wpSummary" ) );
+
+               $this->edittime = $request->getVal( 'wpEdittime' );
+               if( !preg_match( '/^\d{14}$/', $this->edittime ) ) $this->edittime = "";
+
+               $this->preview = $request->getCheck( 'wpPreview' );
+               $this->save = $request->wasPosted() && !$this->preview;
+               $this->minoredit = $request->getCheck( 'wpMinoredit' );
+               $this->watchthis = $request->getCheck( 'wpWatchthis' );
+
+               $this->oldid = $request->getInt( 'oldid' );
+
+               # Section edit can come from either the form or a link
+               $this->section = $request->getVal( 'wpSection', $request->getVal( 'section' ) );
+       }
+
        # Since there is only one text field on the edit form,
        # pressing <enter> will cause the form to be submitted, but
        # the submit button value won't appear in the query, so we
@@ -64,8 +91,7 @@ class EditPage {
 
        function submit()
        {
-               global $wpSave, $wpPreview;
-               if ( ! isset( $wpPreview ) ) { $wpSave = 1; }
+               if( !$this->preview ) $this->save = true;
 
                $this->edit();
        }
@@ -79,22 +105,19 @@ class EditPage {
        function editForm( $formtype )
        {
                global $wgOut, $wgUser;
-               global $wpTextbox1, $wpSummary, $wpWatchthis;
-               global $wpSave, $wpPreview;
-               global $wpMinoredit, $wpEdittime, $wpTextbox2, $wpSection;
-               global $oldid, $redirect, $section;
-               global $wgLang;
-
-               if(isset($wpSection)) { $section=$wpSection; } else { $wpSection=$section; }
+               global $wgLang, $wgParser, $wgTitle;
+           global $wgAllowAnonymousMinor;
+           global $wgWhitelistEdit;
 
                $sk = $wgUser->getSkin();
                $isConflict = false;
-               $wpTextbox1 = rtrim ( $wpTextbox1 ) ; # To avoid text getting longer on each preview
 
                if(!$this->mTitle->getArticleID()) { # new article
-
                        $wgOut->addWikiText(wfmsg("newarticletext"));
+               }
 
+               if( Namespace::isTalk( $this->mTitle->getNamespace() ) ) {
+                       $wgOut->addWikiText(wfmsg("talkpagetext"));
                }
 
                # Attempt submission here.  This will check for edit conflicts,
@@ -115,44 +138,52 @@ class EditPage {
                                $wgOut->readOnlyPage();
                                return;
                        }
+
                        # If article is new, insert it.
-                       
-                       $aid = $this->mTitle->getArticleID();                   
+                       $aid = $this->mTitle->getArticleID();
                        if ( 0 == $aid ) {
-                               # we need to strip Windoze linebreaks because some browsers 
-                               # append them and the string comparison fails
-                               if ( ( "" == $wpTextbox1 ) ||
-                                 ( wfMsg( "newarticletext" ) == rtrim( preg_replace("/\r/","",$wpTextbox1) ) ) ) {
-                                       $wgOut->redirect(  wfLocalUrl(
-                                         $this->mTitle->getPrefixedURL() ) );
+                               # Don't save a new article if it's blank.
+                               if ( ( "" == $this->textbox1 ) ||
+                                 ( wfMsg( "newarticletext" ) == $this->textbox1 ) ) {
+                                       $wgOut->redirect( $this->mTitle->getFullURL() );
                                        return;
                                }
-                               $this->mArticle->insertNewArticle( $wpTextbox1, $wpSummary, $wpMinoredit, $wpWatchthis );
+                               $this->mArticle->insertNewArticle( $this->textbox1, $this->summary, $this->minoredit, $this->watchthis );
                                return;
                        }
+
                        # Article exists. Check for edit conflict.
-                       # Don't check for conflict when appending a comment - this should always work
 
                        $this->mArticle->clear(); # Force reload of dates, etc.
-                       if ( $section!="new" && ( $this->mArticle->getTimestamp() != $wpEdittime ) ) { 
-                               $isConflict = true;             
+
+                       if( ( $this->section != "new" ) &&
+                               ($this->mArticle->getTimestamp() != $this->edittime ) ) {
+                               $isConflict = true;
                        }
-                       $u = $wgUser->getID();
+                       $userid = $wgUser->getID();
 
-                       # Supress edit conflict with self
+                       $text = $this->mArticle->getTextOfLastEditWithSectionReplacedOrAdded(
+                               $this->section, $this->textbox1, $this->summary);
+                       # Suppress edit conflict with self
 
-                       if ( ( 0 != $u ) && ( $this->mArticle->getUser() == $u ) ) {
+                       if ( ( 0 != $userid ) && ( $this->mArticle->getUser() == $userid ) ) {
                                $isConflict = false;
                        } else {
                                # switch from section editing to normal editing in edit conflict
                                if($isConflict) {
-                                       $section="";$wpSection="";
+                    # Attempt merge
+                                       if( $this->mergeChangesInto( $text ) ){
+                                               // Successful merge! Maybe we should tell the user the good news?
+                                               $isConflict = false;
+                                       } else {
+                                               $this->section = "";
+                                               $this->textbox1 = $text;
+                                       }
                                }
-
                        }
                        if ( ! $isConflict ) {
                                # All's well: update the article here
-                               if($this->mArticle->updateArticle( $wpTextbox1, $wpSummary, $wpMinoredit, $wpWatchthis, $wpSection ))
+                               if($this->mArticle->updateArticle( $text, $this->summary, $this->minoredit, $this->watchthis ))
                                        return;
                                else
                                        $isConflict = true;
@@ -162,33 +193,44 @@ class EditPage {
                # checking, etc.
 
                if ( "initial" == $formtype ) {
-                       $wpEdittime = $this->mArticle->getTimestamp();
-                       $wpTextbox1 = $this->mArticle->getContent(true);
-                       $wpSummary = "";
+                       $this->edittime = $this->mArticle->getTimestamp();
+                       $this->textbox1 = $this->mArticle->getContent(true);
+                       $this->summary = "";
+                       $this->proxyCheck();
                }
                $wgOut->setRobotpolicy( "noindex,nofollow" );
-               $wgOut->setArticleFlag( false );
+
+               # Enabled article-related sidebar, toplinks, etc.
+               $wgOut->setArticleRelated( true );
 
                if ( $isConflict ) {
                        $s = wfMsg( "editconflict", $this->mTitle->getPrefixedText() );
                        $wgOut->setPageTitle( $s );
                        $wgOut->addHTML( wfMsg( "explainconflict" ) );
 
-                       $wpTextbox2 = $wpTextbox1;
-                       $wpTextbox1 = $this->mArticle->getContent(true);
-                       $wpEdittime = $this->mArticle->getTimestamp();
+                       $this->textbox2 = $this->textbox1;
+                       $this->textbox1 = $this->mArticle->getContent(true);
+                       $this->edittime = $this->mArticle->getTimestamp();
                } else {
                        $s = wfMsg( "editing", $this->mTitle->getPrefixedText() );
 
-                       if($section!="") { 
-                               if($section=="new") {
+                       if( $this->section != "" ) {
+                               if( $this->section == "new" ) {
                                        $s.=wfMsg("commentedit");
                                } else {
                                        $s.=wfMsg("sectionedit");
                                }
+                               if(!$this->preview) {
+                                       $sectitle=preg_match("/^=+(.*?)=+/mi",
+                                       $this->textbox1,
+                                       $matches);
+                                       if( !empty( $matches[1] ) ) {
+                                               $this->summary = "/* ". trim($matches[1])." */ ";
+                                       }
+                               }
                        }
                        $wgOut->setPageTitle( $s );
-                       if ( $oldid ) {
+                       if ( $this->oldid ) {
                                $this->mArticle->setOldSubtitle();
                                $wgOut->addHTML( wfMsg( "editingold" ) );
                        }
@@ -204,13 +246,13 @@ class EditPage {
                          "</strong><br />\n" );
                }
 
-               $kblength = (int)(strlen( $wpTextbox1 ) / 1024);
+               $kblength = (int)(strlen( $this->textbox1 ) / 1024);
                if( $kblength > 29 ) {
-                       $wgOut->addHTML( "<strong>" . 
+                       $wgOut->addHTML( "<strong>" .
                                wfMsg( "longpagewarning", $kblength )
                                . "</strong>" );
                }
-               
+
                $rows = $wgUser->getOption( "rows" );
                $cols = $wgUser->getOption( "cols" );
 
@@ -219,10 +261,10 @@ class EditPage {
                else $ew = "" ;
 
                $q = "action=submit";
-               if ( "no" == $redirect ) { $q .= "&redirect=no"; }
-               $action = wfEscapeHTML( wfLocalUrl( $this->mTitle->getPrefixedURL(), $q ) );
+               #if ( "no" == $redirect ) { $q .= "&redirect=no"; }
+               $action = $this->mTitle->escapeLocalURL( $q );
 
-               $summary = wfMsg( "summary" );          
+               $summary = wfMsg( "summary" );
                $subject = wfMsg("subject");
                $minor = wfMsg( "minoredit" );
                $watchthis = wfMsg ("watchthis");
@@ -236,111 +278,139 @@ class EditPage {
                $copywarn = wfMsg( "copyrightwarning", $sk->makeKnownLink(
                  wfMsg( "copyrightpage" ) ) );
 
-               $wpTextbox1 = wfEscapeHTML( $wpTextbox1 );
-               $wpTextbox2 = wfEscapeHTML( $wpTextbox2 );
-               $wpSummary = wfEscapeHTML( $wpSummary );
-               
+               if( $wgUser->getOption("showtoolbar") ) {
+                       # prepare toolbar for edit buttons
+                       $toolbar = $sk->getEditToolbar();
+               } else {
+                       $toolbar = "";
+               }
+
                // activate checkboxes if user wants them to be always active
-               if (!$wpPreview && $wgUser->getOption("watchdefault")) $wpWatchthis=1;
-               if (!$wpPreview && $wgUser->getOption("minordefault")) $wpMinoredit=1;          
-               
-               // activate checkbox also if user is already watching the page,
-               // require wpWatchthis to be unset so that second condition is not
-               // checked unnecessarily
-               if (!$wpWatchthis && !$wpPreview && $this->mTitle->userIsWatching()) $wpWatchthis=1;
-               
+               if( !$this->preview ) {
+                       if( $wgUser->getOption( "watchdefault" ) ) $this->watchthis = true;
+                       if( $wgUser->getOption( "minordefault" ) ) $this->minoredit = true;
+
+                       // activate checkbox also if user is already watching the page,
+                       // require wpWatchthis to be unset so that second condition is not
+                       // checked unnecessarily
+                       if( !$this->watchthis && $this->mTitle->userIsWatching() ) $this->watchthis = true;
+               }
+
+               $minoredithtml = "";
+
+               if ( 0 != $wgUser->getID() || $wgAllowAnonymousMinor ) {
+                       $minoredithtml =
+                       "<input tabindex='3' type='checkbox' value='1' name='wpMinoredit'".($this->minoredit?" checked='checked'":"").
+                       " accesskey='".wfMsg('accesskey-minoredit')."' id='wpMinoredit' />".
+                       "<label for='wpMinoredit' title='".wfMsg('tooltip-minoredit')."'>{$minor}</label>";
+               }
+
+               $watchhtml = "";
+
                if ( 0 != $wgUser->getID() ) {
-                       $checkboxhtml=
-                       "<input tabindex=3 type=checkbox value=1 name='wpMinoredit'".($wpMinoredit?" checked":"")." id='wpMinoredit'>".
-                       "<label for='wpMinoredit'>{$minor}</label>".
-                       "<input tabindex=4 type=checkbox name='wpWatchthis'".($wpWatchthis?" checked":"")." id='wpWatchthis'>".
-                       "<label for='wpWatchthis'>{$watchthis}</label><br>";
-                       
-               } else {
-                       $checkboxhtml="";
+                       $watchhtml = "<input tabindex='4' type='checkbox' name='wpWatchthis'".($this->watchthis?" checked='checked'":"").
+                       " accesskey='".wfMsg('accesskey-watch')."' id='wpWatchthis'  />".
+                       "<label for='wpWatchthis' title='".wfMsg('tooltip-watch')."'>{$watchthis}</label>";
                }
 
+               $checkboxhtml = $minoredithtml . $watchhtml . "<br />";
 
                if ( "preview" == $formtype) {
-               
-                       $previewhead="<h2>" . wfMsg( "preview" ) . "</h2>\n<p><large><center><font color=\"#cc0000\">" . 
-                       wfMsg( "note" ) . wfMsg( "previewnote" ) . "</font></center></large><P>\n";
+                       $previewhead="<h2>" . wfMsg( "preview" ) . "</h2>\n<p><large><center><font color=\"#cc0000\">" .
+                       wfMsg( "note" ) . wfMsg( "previewnote" ) . "</font></center></large></p>\n";
                        if ( $isConflict ) {
                                $previewhead.="<h2>" . wfMsg( "previewconflict" ) .
                                  "</h2>\n";
                        }
-                       $previewtext = wfUnescapeHTML( $wpTextbox1 );
-                       
+                       $previewtext = wfUnescapeHTML( $this->textbox1 );
+
+                       $parserOptions = ParserOptions::newFromUser( $wgUser );
+                       $parserOptions->setUseCategoryMagic( false );
+                       $parserOptions->setEditSection( false );
+                       $parserOptions->setEditSectionOnRightClick( false );
+                       $parserOutput = $wgParser->parse( $this->mArticle->preSaveTransform( $previewtext ) ."\n\n",
+                               $wgTitle, $parserOptions );
+                       $previewHTML = $parserOutput->mText;
+
                        if($wgUser->getOption("previewontop")) {
                                $wgOut->addHTML($previewhead);
-                               $wgOut->addWikiText( $this->mArticle->preSaveTransform( $previewtext ) ."\n\n");
+                               $wgOut->addHTML($previewHTML);
                        }
                        $wgOut->addHTML( "<br clear=\"all\" />\n" );
                }
 
                # if this is a comment, show a subject line at the top, which is also the edit summary.
                # Otherwise, show a summary field at the bottom
-               if($section=="new") {
-
-                       $commentsubject="{$subject}: <input tabindex=1 type=text value=\"{$wpSummary}\" name=\"wpSummary\" maxlength=200 size=60><br>";
+               $summarytext = htmlspecialchars( $wgLang->recodeForEdit( $this->summary ) ); # FIXME
+               if( $this->section == "new" ) {
+                       $commentsubject="{$subject}: <input tabindex='1' type='text' value=\"$summarytext\" name=\"wpSummary\" maxlength='200' size='60' /><br />";
+                       $editsummary = "";
                } else {
-
-                       $editsummary="{$summary}: <input tabindex=3 type=text value=\"{$wpSummary}\" name=\"wpSummary\" maxlength=200 size=60><br>";
+                       $commentsubject = "";
+                       $editsummary="{$summary}: <input tabindex='3' type='text' value=\"$summarytext\" name=\"wpSummary\" maxlength='200' size='60' /><br />";
                }
 
+               if( !$this->preview ) {
+                       # Don't select the edit box on preview; this interferes with seeing what's going on.
+                       $wgOut->setOnloadHandler( "document.editform.wpTextbox1.focus()" );
+               }
                $wgOut->addHTML( "
+{$toolbar}
 <form id=\"editform\" name=\"editform\" method=\"post\" action=\"$action\"
 enctype=\"application/x-www-form-urlencoded\">
 {$commentsubject}
-<textarea tabindex=2 name=\"wpTextbox1\" rows={$rows}
-cols={$cols}{$ew} wrap=\"virtual\">" .
-$wgLang->recodeForEdit( $wpTextbox1 ) .
+<div id=\"tawrapper\"><textarea tabindex='1' accesskey=\",\" name=\"wpTextbox1\" rows='{$rows}'
+cols='{$cols}'{$ew}>" .
+htmlspecialchars( $wgLang->recodeForEdit( $this->textbox1 ) ) .
 "
-</textarea>
-<br>{$editsummary}
+</textarea></div>
+<br />{$editsummary}
 {$checkboxhtml}
-<input tabindex=5 type=submit value=\"{$save}\" name=\"wpSave\">
-<input tabindex=6 type=submit value=\"{$prev}\" name=\"wpPreview\">
+<input tabindex='5' type='submit' value=\"{$save}\" name=\"wpSave\" accesskey=\"".wfMsg('accesskey-save')."\"".
+" title=\"".wfMsg('tooltip-save')."\"/>
+<input tabindex='6' type='submit' value=\"{$prev}\" name=\"wpPreview\" accesskey=\"".wfMsg('accesskey-preview')."\"".
+" title=\"".wfMsg('tooltip-preview')."\"/>
 <em>{$cancel}</em> | <em>{$edithelp}</em>
-<br><br>{$copywarn}
-<input type=hidden value=\"{$section}\" name=\"wpSection\">
-<input type=hidden value=\"{$wpEdittime}\" name=\"wpEdittime\">\n" );
+<br /><br />{$copywarn}
+<input type='hidden' value=\"" . htmlspecialchars( $this->section ) . "\" name=\"wpSection\" />
+<input type='hidden' value=\"{$this->edittime}\" name=\"wpEdittime\" />\n" );
 
                if ( $isConflict ) {
                        $wgOut->addHTML( "<h2>" . wfMsg( "yourdiff" ) . "</h2>\n" );
-                       DifferenceEngine::showDiff( $wpTextbox2, $wpTextbox1,
+                       DifferenceEngine::showDiff( $this->textbox2, $this->textbox1,
                          wfMsg( "yourtext" ), wfMsg( "storedversion" ) );
 
                        $wgOut->addHTML( "<h2>" . wfMsg( "yourtext" ) . "</h2>
-<textarea tabindex=6 name=\"wpTextbox2\" rows={$rows} cols={$cols} wrap=virtual>"
-. $wgLang->recodeForEdit( $wpTextbox2 ) .
+<textarea tabindex=6 name=\"wpTextbox2\" rows='{$rows}' cols='{$cols}' wrap='virtual'>"
+. htmlspecialchars( $wgLang->recodeForEdit( $this->textbox2 ) ) .
 "
 </textarea>" );
                }
                $wgOut->addHTML( "</form>\n" );
                if($formtype =="preview" && !$wgUser->getOption("previewontop")) {
                        $wgOut->addHTML($previewhead);
-                       $wgOut->addWikiText( $this->mArticle->preSaveTransform( $previewtext ) );
+                       $wgOut->addHTML($previewHTML);
                }
 
        }
 
        function blockedIPpage()
        {
-               global $wgOut, $wgUser, $wgLang;
+               global $wgOut, $wgUser, $wgLang, $wgIP;
 
                $wgOut->setPageTitle( wfMsg( "blockedtitle" ) );
                $wgOut->setRobotpolicy( "noindex,nofollow" );
-               $wgOut->setArticleFlag( false );
+               $wgOut->setArticleRelated( false );
 
                $id = $wgUser->blockedBy();
                $reason = $wgUser->blockedFor();
-
-               $name = User::whoIs( $id );
+                $ip = $wgIP;
+               
+                $name = User::whoIs( $id );
                $link = "[[" . $wgLang->getNsText( Namespace::getUser() ) .
                  ":{$name}|{$name}]]";
 
-               $wgOut->addWikiText( wfMsg( "blockedtext", $link, $reason ) );
+               $wgOut->addWikiText( wfMsg( "blockedtext", $link, $reason, $ip ) );
                $wgOut->returnToMain( false );
        }
 
@@ -352,13 +422,74 @@ $wgLang->recodeForEdit( $wpTextbox1 ) .
 
                $wgOut->setPageTitle( wfMsg( "whitelistedittitle" ) );
                $wgOut->setRobotpolicy( "noindex,nofollow" );
-               $wgOut->setArticleFlag( false );
+               $wgOut->setArticleRelated( false );
 
                $wgOut->addWikiText( wfMsg( "whitelistedittext" ) );
                $wgOut->returnToMain( false );
        }
 
+       # Forks processes to scan the originating IP for an open proxy server
+       # MemCached can be used to skip IPs that have already been scanned
+       function proxyCheck()
+       {
+               global $wgBlockOpenProxies, $wgProxyPorts, $wgProxyScriptPath;
+               global $wgIP, $wgUseMemCached, $wgMemc, $wgDBname, $wgProxyMemcExpiry;
+               
+               if ( !$wgBlockOpenProxies ) {
+                       return;
+               }
+               
+               # Get MemCached key
+               $skip = false;
+               if ( $wgUseMemCached ) {
+                       $mcKey = "$wgDBname:proxy:ip:$wgIP";
+                       $mcValue = $wgMemc->get( $mcKey );
+                       if ( $mcValue ) {
+                               $skip = true;
+                       }
+               }
+
+               # Fork the processes
+               if ( !$skip ) {
+                       $title = Title::makeTitle( NS_SPECIAL, "Blockme" );
+                       $iphash = md5( $wgIP . $wgProxyKey );
+                       $url = $title->getFullURL( "ip=$iphash" );
+
+                       foreach ( $wgProxyPorts as $port ) {
+                               $params = implode( " ", array(
+                                                       escapeshellarg( $wgProxyScriptPath ),
+                                                       escapeshellarg( $wgIP ),
+                                                       escapeshellarg( $port ),
+                                                       escapeshellarg( $url )
+                                                       ));
+                               exec( "php $params &>/dev/null &" );
+                       }
+                       # Set MemCached key
+                       if ( $wgUseMemCached ) {
+                               $wgMemc->set( $mcKey, 1, $wgProxyMemcExpiry );
+                       }
+               }
+       }
 
+       /* private */ function mergeChangesInto( &$text ){
+               $oldDate = $this->edittime;
+               $res = wfQuery("SELECT cur_text FROM cur WHERE cur_id=" .
+                       $this->mTitle->getArticleID() . " FOR UPDATE", DB_WRITE);
+               $obj = wfFetchObject($res);
+
+               $yourtext = $obj->cur_text;
+               $ns = $this->mTitle->getNamespace();
+               $title = wfStrencode( $this->mTitle->getDBkey() );
+               $res = wfQuery("SELECT old_text FROM old WHERE old_namespace = $ns AND ".
+                 "old_title = '{$title}' AND old_timestamp = '{$oldDate}'", DB_WRITE);
+               $obj = wfFetchObject($res);
+               if(wfMerge($obj->old_text, $text, $yourtext, $result)){
+                       $text = $result;
+                       return true;
+               } else {
+                       return false;
+               }
+       }
 }
 
 ?>