includes/EditPage.php

   1 <?php
   2
   3 # Splitting edit page/HTML interface from Article...
   4 # The actual database and text munging is still in Article,
   5 # but it should get easier to call those from alternate
   6 # interfaces.
   7
   8 class EditPage {
   9         var $mArticle;
  10         var $mTitle;
  11
  12         # Form values
  13         var $save = false, $preview = false;
  14         var $minoredit = false, $watchthis = false;
  15         var $textbox1 = "", $textbox2 = "", $summary = "";
  16         var $edittime = "", $section = "";
  17         var $oldid = 0;
  18
  19         function EditPage( $article ) {
  20                 $this->mArticle =& $article;
  21                 global $wgTitle;
  22                 $this->mTitle =& $wgTitle;
  23         }
  24
  25         # This is the function that gets called for "action=edit".
  26
  27         function edit()
  28         {
  29                 global $wgOut, $wgUser, $wgWhitelistEdit, $wgRequest;
  30                 // this is not an article
  31                 $wgOut->setArticleFlag(false);
  32
  33                 $this->importFormData( $wgRequest );
  34
  35                 if ( ! $this->mTitle->userCanEdit() ) {
  36                         $wgOut->readOnlyPage( $this->mArticle->getContent( true ), true );
  37                         return;
  38                 }
  39                 if ( $wgUser->isBlocked() ) {
  40                         $this->blockedIPpage();
  41                         return;
  42                 }
  43                 if ( !$wgUser->getID() && $wgWhitelistEdit ) {
  44                         $this->userNotLoggedInPage();
  45                         return;
  46                 }
  47                 if ( wfReadOnly() ) {
  48                         if( $this->save || $this->preview ) {
  49                                 $this->editForm( "preview" );
  50                         } else {
  51                                 $wgOut->readOnlyPage( $this->mArticle->getContent( true ) );
  52                         }
  53                         return;
  54                 }
  55                 if ( $this->save ) {
  56                         $this->editForm( "save" );
  57                 } else if ( $this->preview ) {
  58                         $this->editForm( "preview" );
  59                 } else { # First time through
  60                         $this->editForm( "initial" );
  61                 }
  62         }
  63
  64         function importFormData( &$request ) {
  65                 # These fields need to be checked for encoding.
  66                 # Also remove trailing whitespace, but don't remove _initial_
  67                 # whitespace from the text boxes. This may be significant formatting.
  68                 $this->textbox1 = rtrim( $request->getText( "wpTextbox1" ) );
  69                 $this->textbox2 = rtrim( $request->getText( "wpTextbox2" ) );
  70                 $this->summary = trim( $request->getText( "wpSummary" ) );
  71
  72                 $this->edittime = $request->getVal( 'wpEdittime' );
  73                 if( !preg_match( '/^\d{14}$/', $this->edittime ) ) $this->edittime = "";
  74
  75                 $this->preview = $request->getCheck( 'wpPreview' );
  76                 $this->save = $request->wasPosted() && !$this->preview;
  77                 $this->minoredit = $request->getCheck( 'wpMinoredit' );
  78                 $this->watchthis = $request->getCheck( 'wpWatchthis' );
  79
  80                 $this->oldid = $request->getInt( 'oldid' );
  81
  82                 # Section edit can come from either the form or a link
  83                 $this->section = $request->getVal( 'wpSection', $request->getVal( 'section' ) );
  84         }
  85
  86         # Since there is only one text field on the edit form,
  87         # pressing <enter> will cause the form to be submitted, but
  88         # the submit button value won't appear in the query, so we
  89         # Fake it here before going back to edit().  This is kind of
  90         # ugly, but it helps some old URLs to still work.
  91
  92         function submit()
  93         {
  94                 if( !$this->preview ) $this->save = true;
  95
  96                 $this->edit();
  97         }
  98
  99         # The edit form is self-submitting, so that when things like
 100         # preview and edit conflicts occur, we get the same form back
 101         # with the extra stuff added.  Only when the final submission
 102         # is made and all is well do we actually save and redirect to
 103         # the newly-edited page.
 104
 105         function editForm( $formtype )
 106         {
 107                 global $wgOut, $wgUser;
 108                 global $wgLang, $wgParser, $wgTitle;
 109                 global $wgAllowAnonymousMinor;
 110                 global $wgWhitelistEdit;
 111                 global $wgSpamRegex;
 112
 113                 $sk = $wgUser->getSkin();
 114                 $isConflict = false;
 115                 // css / js subpages of user pages get a special treatment
 116                 $isCssJsSubpage = (Namespace::getUser() == $wgTitle->getNamespace() and preg_match("/\\.(css|js)$/", $wgTitle->getText() ));
 117
 118                 if(!$this->mTitle->getArticleID()) { # new article
 119                         $wgOut->addWikiText(wfmsg("newarticletext"));
 120                 }
 121
 122                 if( Namespace::isTalk( $this->mTitle->getNamespace() ) ) {
 123                         $wgOut->addWikiText(wfmsg("talkpagetext"));
 124                 }
 125
 126                 # Attempt submission here.  This will check for edit conflicts,
 127                 # and redundantly check for locked database, blocked IPs, etc.
 128                 # that edit() already checked just in case someone tries to sneak
 129                 # in the back door with a hand-edited submission URL.
 130
 131                 if ( "save" == $formtype ) {
 132                         # Check for spam
 133                         if ( $wgSpamRegex && preg_match( $wgSpamRegex, $this->textbox1 ) ) {
 134                                         if ( $wgUser->isSysop() ) {
 135                                                 $this->spamPage();
 136                                         } else {
 137                                                 sleep(10);
 138                                                 $wgOut->redirect( $this->mTitle->getFullURL() );
 139                                         }
 140                                         return;
 141                         }
 142                         if ( $wgUser->isBlocked() ) {
 143                                 $this->blockedIPpage();
 144                                 return;
 145                         }
 146                         if ( !$wgUser->getID() && $wgWhitelistEdit ) {
 147                                 $this->userNotLoggedInPage();
 148                                 return;
 149                         }
 150                         if ( wfReadOnly() ) {
 151                                 $wgOut->readOnlyPage();
 152                                 return;
 153                         }
 154
 155                         # If article is new, insert it.
 156                         $aid = $this->mTitle->getArticleID();
 157                         if ( 0 == $aid ) {
 158                                 # Don't save a new article if it's blank.
 159                                 if ( ( "" == $this->textbox1 ) ||
 160                                   ( wfMsg( "newarticletext" ) == $this->textbox1 ) ) {
 161                                         $wgOut->redirect( $this->mTitle->getFullURL() );
 162                                         return;
 163                                 }
 164                                 $this->mArticle->insertNewArticle( $this->textbox1, $this->summary, $this->minoredit, $this->watchthis );
 165                                 return;
 166                         }
 167
 168                         # Article exists. Check for edit conflict.
 169
 170                         $this->mArticle->clear(); # Force reload of dates, etc.
 171
 172                         if( ( $this->section != "new" ) &&
 173                                 ($this->mArticle->getTimestamp() != $this->edittime ) ) {
 174                                 $isConflict = true;
 175                         }
 176                         $userid = $wgUser->getID();
 177
 178                         $text = $this->mArticle->getTextOfLastEditWithSectionReplacedOrAdded(
 179                                 $this->section, $this->textbox1, $this->summary);
 180                         # Suppress edit conflict with self
 181
 182                         if ( ( 0 != $userid ) && ( $this->mArticle->getUser() == $userid ) ) {
 183                                 $isConflict = false;
 184                         } else {
 185                                 # switch from section editing to normal editing in edit conflict
 186                                 if($isConflict) {
 187                                         # Attempt merge
 188                                         if( $this->mergeChangesInto( $text ) ){
 189                                                 // Successful merge! Maybe we should tell the user the good news?
 190                                                 $isConflict = false;
 191                                         } else {
 192                                                 $this->section = "";
 193                                                 $this->textbox1 = $text;
 194                                         }
 195                                 }
 196                         }
 197                         if ( ! $isConflict ) {
 198                                 # All's well
 199                                 $sectionanchor = '';
 200                                 if( $this->section != '' ) {
 201                                         # Try to get a section anchor from the section source, redirect to edited section if header found
 202                                         # XXX: might be better to integrate this into Article::getTextOfLastEditWithSectionReplacedOrAdded
 203                                         # for duplicate heading checking and maybe parsing
 204                                         $hasmatch = preg_match( "/^ *([=]{1,6})(.*?)(\\1) *\\n/i", $this->textbox1, $matches );
 205                                         # we can't deal with anchors, includes, html etc in the header for now,
 206                                         # headline would need to be parsed to improve this
 207                                         #if($hasmatch and strlen($matches[2]) > 0 and !preg_match( "/[\\['{<>]/", $matches[2])) {
 208                                         if($hasmatch and strlen($matches[2]) > 0) {
 209                                                 global $wgInputEncoding;
 210                                                 $headline = do_html_entity_decode( $matches[2], ENT_COMPAT, $wgInputEncoding );
 211                                                 # strip out HTML
 212                                                 $headline = preg_replace( "/<.*?" . ">/","",$headline );
 213                                                 $headline = trim( $headline );
 214                                                 $sectionanchor = '#'.urlencode( str_replace(' ', '_', $headline ) );
 215                                                 $replacearray = array(
 216                                                         '%3A' => ':',
 217                                                         '%' => '.'
 218                                                 );
 219                                                 $sectionanchor = str_replace(array_keys($replacearray),array_values($replacearray),$sectionanchor);
 220                                         }
 221                                 }
 222
 223                                 # update the article here
 224                                 if($this->mArticle->updateArticle( $text, $this->summary, $this->minoredit, $this->watchthis, '', $sectionanchor ))
 225                                         return;
 226                                 else
 227                                         $isConflict = true;
 228                         }
 229                 }
 230                 # First time through: get contents, set time for conflict
 231                 # checking, etc.
 232
 233                 if ( "initial" == $formtype ) {
 234                         $this->edittime = $this->mArticle->getTimestamp();
 235                         $this->textbox1 = $this->mArticle->getContent( true );
 236                         $this->summary = "";
 237                         $this->proxyCheck();
 238                 }
 239                 $wgOut->setRobotpolicy( "noindex,nofollow" );
 240
 241                 # Enabled article-related sidebar, toplinks, etc.
 242                 $wgOut->setArticleRelated( true );
 243
 244                 if ( $isConflict ) {
 245                         $s = wfMsg( "editconflict", $this->mTitle->getPrefixedText() );
 246                         $wgOut->setPageTitle( $s );
 247                         $wgOut->addHTML( wfMsg( "explainconflict" ) );
 248
 249                         $this->textbox2 = $this->textbox1;
 250                         $this->textbox1 = $this->mArticle->getContent( true );
 251                         $this->edittime = $this->mArticle->getTimestamp();
 252                 } else {
 253                         $s = wfMsg( "editing", $this->mTitle->getPrefixedText() );
 254
 255                         if( $this->section != "" ) {
 256                                 if( $this->section == "new" ) {
 257                                         $s.=wfMsg("commentedit");
 258                                 } else {
 259                                         $s.=wfMsg("sectionedit");
 260                                 }
 261                                 if(!$this->preview) {
 262                                         $sectitle=preg_match("/^=+(.*?)=+/mi",
 263                                         $this->textbox1,
 264                                         $matches);
 265                                         if( !empty( $matches[1] ) ) {
 266                                                 $this->summary = "/* ". trim($matches[1])." */ ";
 267                                         }
 268                                 }
 269                         }
 270                         $wgOut->setPageTitle( $s );
 271                         if ( $this->oldid ) {
 272                                 $this->mArticle->setOldSubtitle();
 273                                 $wgOut->addHTML( wfMsg( "editingold" ) );
 274                         }
 275                 }
 276
 277                 if( wfReadOnly() ) {
 278                         $wgOut->addHTML( "<strong>" .
 279                         wfMsg( "readonlywarning" ) .
 280                         "</strong>" );
 281                 } else if ( $isCssJsSubpage and "preview" != $formtype) {
 282                         $wgOut->addHTML( wfMsg( "usercssjsyoucanpreview" ));
 283                 }
 284                 if( $this->mTitle->isProtected() ) {
 285                         $wgOut->addHTML( "<strong>" . wfMsg( "protectedpagewarning" ) .
 286                           "</strong><br />\n" );
 287                 }
 288
 289                 $kblength = (int)(strlen( $this->textbox1 ) / 1024);
 290                 if( $kblength > 29 ) {
 291                         $wgOut->addHTML( "<strong>" .
 292                                 wfMsg( "longpagewarning", $kblength )
 293                                 . "</strong>" );
 294                 }
 295
 296                 $rows = $wgUser->getOption( "rows" );
 297                 $cols = $wgUser->getOption( "cols" );
 298
 299                 $ew = $wgUser->getOption( "editwidth" );
 300                 if ( $ew ) $ew = " style=\"width:100%\"";
 301                 else $ew = "" ;
 302
 303                 $q = "action=submit";
 304                 #if ( "no" == $redirect ) { $q .= "&redirect=no"; }
 305                 $action = $this->mTitle->escapeLocalURL( $q );
 306
 307                 $summary = wfMsg( "summary" );
 308                 $subject = wfMsg("subject");
 309                 $minor = wfMsg( "minoredit" );
 310                 $watchthis = wfMsg ("watchthis");
 311                 $save = wfMsg( "savearticle" );
 312                 $prev = wfMsg( "showpreview" );
 313
 314                 $cancel = $sk->makeKnownLink( $this->mTitle->getPrefixedText(),
 315                   wfMsg( "cancel" ) );
 316                 $edithelpurl = $sk->makeUrl( wfMsg( 'edithelppage' ));
 317                 $edithelp = '<a target="helpwindow" href="'.$edithelpurl.'">'.
 318                         htmlspecialchars( wfMsg( 'edithelp' ) ).'</a> '.
 319                         htmlspecialchars( wfMsg( 'newwindow' ) );
 320                 $copywarn = wfMsg( "copyrightwarning", $sk->makeKnownLink(
 321                   wfMsg( "copyrightpage" ) ) );
 322
 323                 if( $wgUser->getOption("showtoolbar") and !$isCssJsSubpage ) {
 324                         # prepare toolbar for edit buttons
 325                         $toolbar = $sk->getEditToolbar();
 326                 } else {
 327                         $toolbar = "";
 328                 }
 329
 330                 // activate checkboxes if user wants them to be always active
 331                 if( !$this->preview ) {
 332                         if( $wgUser->getOption( "watchdefault" ) ) $this->watchthis = true;
 333                         if( $wgUser->getOption( "minordefault" ) ) $this->minoredit = true;
 334
 335                         // activate checkbox also if user is already watching the page,
 336                         // require wpWatchthis to be unset so that second condition is not
 337                         // checked unnecessarily
 338                         if( !$this->watchthis && $this->mTitle->userIsWatching() ) $this->watchthis = true;
 339                 }
 340
 341                 $minoredithtml = "";
 342
 343                 if ( 0 != $wgUser->getID() || $wgAllowAnonymousMinor ) {
 344                         $minoredithtml =
 345                         "<input tabindex='3' type='checkbox' value='1' name='wpMinoredit'".($this->minoredit?" checked='checked'":"").
 346                         " accesskey='".wfMsg('accesskey-minoredit')."' id='wpMinoredit' />".
 347                         "<label for='wpMinoredit' title='".wfMsg('tooltip-minoredit')."'>{$minor}</label>";
 348                 }
 349
 350                 $watchhtml = "";
 351
 352                 if ( 0 != $wgUser->getID() ) {
 353                         $watchhtml = "<input tabindex='4' type='checkbox' name='wpWatchthis'".($this->watchthis?" checked='checked'":"").
 354                         " accesskey='".wfMsg('accesskey-watch')."' id='wpWatchthis'  />".
 355                         "<label for='wpWatchthis' title='".wfMsg('tooltip-watch')."'>{$watchthis}</label>";
 356                 }
 357
 358                 $checkboxhtml = $minoredithtml . $watchhtml . "<br />";
 359
 360                 if ( "preview" == $formtype) {
 361                         $previewhead="<h2>" . wfMsg( "preview" ) . "</h2>\n<p><large><center><font color=\"#cc0000\">" .
 362                         wfMsg( "note" ) . wfMsg( "previewnote" ) . "</font></center></large></p>\n";
 363                         if ( $isConflict ) {
 364                                 $previewhead.="<h2>" . wfMsg( "previewconflict" ) .
 365                                   "</h2>\n";
 366                         }
 367
 368                         $parserOptions = ParserOptions::newFromUser( $wgUser );
 369                         $parserOptions->setUseCategoryMagic( false );
 370                         $parserOptions->setEditSection( false );
 371                         $parserOptions->setEditSectionOnRightClick( false );
 372                         # don't parse user css/js, show message about preview
 373                         # XXX: stupid php bug won't let us use $wgTitle->isCssJsSubpage() here
 374                         if ( $isCssJsSubpage ) {
 375                                 if(preg_match("/\\.css$/", $wgTitle->getText() ) ) {
 376                                         $previewtext = wfMsg('usercsspreview');
 377                                 } else if(preg_match("/\\.js$/", $wgTitle->getText() ) ) {
 378                                         $previewtext = wfMsg('userjspreview');
 379                                 }
 380                                 $parserOutput = $wgParser->parse( $previewtext , $wgTitle, $parserOptions );
 381                                 $wgOut->addHTML( $parserOutput->mText );
 382                         } else {
 383                                 $parserOutput = $wgParser->parse( $this->mArticle->preSaveTransform( $this->textbox1 ) ."\n\n",
 384                                 $wgTitle, $parserOptions );
 385                                 $previewHTML = $parserOutput->mText;
 386
 387                                 if($wgUser->getOption("previewontop")) {
 388                                         $wgOut->addHTML($previewhead);
 389                                         $wgOut->addHTML($previewHTML);
 390                                 }
 391                                 $wgOut->addLanguageLinks($parserOutput->getLanguageLinks());
 392                                 $wgOut->addHTML( "<br style=\"clear:both;\" />\n" );
 393                         }
 394                 }
 395
 396                 # if this is a comment, show a subject line at the top, which is also the edit summary.
 397                 # Otherwise, show a summary field at the bottom
 398                 $summarytext = htmlspecialchars( $wgLang->recodeForEdit( $this->summary ) ); # FIXME
 399                 if( $this->section == "new" ) {
 400                         $commentsubject="{$subject}: <input tabindex='1' type='text' value=\"$summarytext\" name=\"wpSummary\" maxlength='200' size='60' /><br />";
 401                         $editsummary = "";
 402                 } else {
 403                         $commentsubject = "";
 404                         $editsummary="{$summary}: <input tabindex='3' type='text' value=\"$summarytext\" name=\"wpSummary\" maxlength='200' size='60' /><br />";
 405                 }
 406
 407                 if( !$this->preview ) {
 408                         # Don't select the edit box on preview; this interferes with seeing what's going on.
 409                         $wgOut->setOnloadHandler( "document.editform.wpTextbox1.focus()" );
 410                 }
 411                 $wgOut->addHTML( "
 412 {$toolbar}
 413 <form id=\"editform\" name=\"editform\" method=\"post\" action=\"$action\"
 414 enctype=\"application/x-www-form-urlencoded\">
 415 {$commentsubject}
 416 <textarea tabindex='1' accesskey=\",\" name=\"wpTextbox1\" rows='{$rows}'
 417 cols='{$cols}'{$ew}>" .
 418 htmlspecialchars( $wgLang->recodeForEdit( $this->textbox1 ) ) .
 419 "
 420 </textarea>
 421 <br />{$editsummary}
 422 {$checkboxhtml}
 423 <input tabindex='5' id='wpSave' type='submit' value=\"{$save}\" name=\"wpSave\" accesskey=\"".wfMsg('accesskey-save')."\"".
 424 " title=\"".wfMsg('tooltip-save')."\"/>
 425 <input tabindex='6' id='wpSave' type='submit' value=\"{$prev}\" name=\"wpPreview\" accesskey=\"".wfMsg('accesskey-preview')."\"".
 426 " title=\"".wfMsg('tooltip-preview')."\"/>
 427 <em>{$cancel}</em> | <em>{$edithelp}</em>
 428 <br /><br />{$copywarn}
 429 <input type='hidden' value=\"" . htmlspecialchars( $this->section ) . "\" name=\"wpSection\" />
 430 <input type='hidden' value=\"{$this->edittime}\" name=\"wpEdittime\" />\n" );
 431
 432                 if ( $isConflict ) {
 433                         $wgOut->addHTML( "<h2>" . wfMsg( "yourdiff" ) . "</h2>\n" );
 434                         DifferenceEngine::showDiff( $this->textbox2, $this->textbox1,
 435                           wfMsg( "yourtext" ), wfMsg( "storedversion" ) );
 436
 437                         $wgOut->addHTML( "<h2>" . wfMsg( "yourtext" ) . "</h2>
 438 <textarea tabindex=6 id='wpTextbox2' name=\"wpTextbox2\" rows='{$rows}' cols='{$cols}' wrap='virtual'>"
 439 . htmlspecialchars( $wgLang->recodeForEdit( $this->textbox2 ) ) .
 440 "
 441 </textarea>" );
 442                 }
 443                 $wgOut->addHTML( "</form>\n" );
 444                 if($formtype =="preview" && !$wgUser->getOption("previewontop")) {
 445                         $wgOut->addHTML($previewhead);
 446                         $wgOut->addHTML($previewHTML);
 447                 }
 448
 449         }
 450
 451         function blockedIPpage()
 452         {
 453                 global $wgOut, $wgUser, $wgLang, $wgIP;
 454
 455                 $wgOut->setPageTitle( wfMsg( "blockedtitle" ) );
 456                 $wgOut->setRobotpolicy( "noindex,nofollow" );
 457                 $wgOut->setArticleRelated( false );
 458
 459                 $id = $wgUser->blockedBy();
 460                 $reason = $wgUser->blockedFor();
 461                 $ip = $wgIP;
 462
 463                 $name = User::whoIs( $id );
 464                 $link = "[[" . $wgLang->getNsText( Namespace::getUser() ) .
 465                   ":{$name}|{$name}]]";
 466
 467                 $wgOut->addWikiText( wfMsg( "blockedtext", $link, $reason, $ip, $name ) );
 468                 $wgOut->returnToMain( false );
 469         }
 470
 471
 472
 473         function userNotLoggedInPage()
 474         {
 475                 global $wgOut, $wgUser, $wgLang;
 476
 477                 $wgOut->setPageTitle( wfMsg( "whitelistedittitle" ) );
 478                 $wgOut->setRobotpolicy( "noindex,nofollow" );
 479                 $wgOut->setArticleRelated( false );
 480
 481                 $wgOut->addWikiText( wfMsg( "whitelistedittext" ) );
 482                 $wgOut->returnToMain( false );
 483         }
 484
 485         function spamPage()
 486         {
 487                 global $wgOut, $wgSpamRegex;
 488                 $wgOut->setPageTitle( wfMsg( "spamprotectiontitle" ) );
 489                 $wgOut->setRobotpolicy( "noindex,nofollow" );
 490                 $wgOut->setArticleRelated( false );
 491
 492                 $wgOut->addWikiText( wfMsg( "spamprotectiontext" ) );
 493                 $wgOut->addWikiText( "<pre>".$wgSpamRegex."</pre>" );
 494                 $wgOut->returnToMain( false );
 495         }
 496
 497         # Forks processes to scan the originating IP for an open proxy server
 498         # MemCached can be used to skip IPs that have already been scanned
 499         function proxyCheck()
 500         {
 501                 global $wgBlockOpenProxies, $wgProxyPorts, $wgProxyScriptPath;
 502                 global $wgIP, $wgUseMemCached, $wgMemc, $wgDBname, $wgProxyMemcExpiry;
 503
 504                 if ( !$wgBlockOpenProxies ) {
 505                         return;
 506                 }
 507
 508                 # Get MemCached key
 509                 $skip = false;
 510                 if ( $wgUseMemCached ) {
 511                         $mcKey = "$wgDBname:proxy:ip:$wgIP";
 512                         $mcValue = $wgMemc->get( $mcKey );
 513                         if ( $mcValue ) {
 514                                 $skip = true;
 515                         }
 516                 }
 517
 518                 # Fork the processes
 519                 if ( !$skip ) {
 520                         $title = Title::makeTitle( NS_SPECIAL, "Blockme" );
 521                         $iphash = md5( $wgIP . $wgProxyKey );
 522                         $url = $title->getFullURL( "ip=$iphash" );
 523
 524                         foreach ( $wgProxyPorts as $port ) {
 525                                 $params = implode( " ", array(
 526                                                         escapeshellarg( $wgProxyScriptPath ),
 527                                                         escapeshellarg( $wgIP ),
 528                                                         escapeshellarg( $port ),
 529                                                         escapeshellarg( $url )
 530                                                         ));
 531                                 exec( "php $params &>/dev/null &" );
 532                         }
 533                         # Set MemCached key
 534                         if ( $wgUseMemCached ) {
 535                                 $wgMemc->set( $mcKey, 1, $wgProxyMemcExpiry );
 536                         }
 537                 }
 538         }
 539
 540         /* private */ function mergeChangesInto( &$text ){
 541                 $oldDate = $this->edittime;
 542                 $res = wfQuery("SELECT cur_text FROM cur WHERE cur_id=" .
 543                         $this->mTitle->getArticleID() . " FOR UPDATE", DB_WRITE);
 544                 $obj = wfFetchObject($res);
 545
 546                 $yourtext = $obj->cur_text;
 547                 $ns = $this->mTitle->getNamespace();
 548                 $title = wfStrencode( $this->mTitle->getDBkey() );
 549                 $res = wfQuery("SELECT old_text,old_flags FROM old WHERE old_namespace = $ns AND ".
 550                   "old_title = '{$title}' AND old_timestamp = '{$oldDate}'", DB_WRITE);
 551                 $obj = wfFetchObject($res);
 552                 $oldText = Article::getRevisionText( $obj );
 553
 554                 if(wfMerge($oldText, $text, $yourtext, $result)){
 555                         $text = $result;
 556                         return true;
 557                 } else {
 558                         return false;
 559                 }
 560         }
 561 }
 562
 563 ?>