includes/SpecialRecentchanges.php

   1 <?php
   2 /**
   3  *
   4  * @package MediaWiki
   5  * @subpackage SpecialPage
   6  */
   7
   8 /**
   9  *
  10  */
  11 require_once( 'Feed.php' );
  12 require_once( 'ChangesList.php' );
  13 require_once( 'Revision.php' );
  14
  15 /**
  16  * Constructor
  17  */
  18 function wfSpecialRecentchanges( $par, $specialPage ) {
  19         global $wgUser, $wgOut, $wgLang, $wgContLang, $wgTitle, $wgMemc, $wgDBname;
  20         global $wgRequest, $wgSitename, $wgLanguageCode, $wgContLanguageCode;
  21         global $wgFeedClasses, $wgUseRCPatrol;
  22         global $wgRCShowWatchingUsers, $wgShowUpdatedMarker;
  23         global $wgLinkCache;
  24         $fname = 'wfSpecialRecentchanges';
  25
  26         # Get query parameters
  27         $feedFormat = $wgRequest->getVal( 'feed' );
  28
  29         $defaults = array(
  30         /* int  */ 'days' => $wgUser->getDefaultOption('rcdays'),
  31         /* int  */ 'limit' => $wgUser->getDefaultOption('rclimit'),
  32         /* bool */ 'hideminor' => false,
  33         /* bool */ 'hidebots' => true,
  34         /* bool */ 'hideliu' => false,
  35         /* bool */ 'hidepatrolled' => false,
  36         /* text */ 'from' => '',
  37         /* text */ 'namespace' => null,
  38         /* bool */ 'invert' => false,
  39         );
  40
  41         extract($defaults);
  42
  43
  44         $days = $wgUser->getOption( 'rcdays' );
  45         if ( !$days ) { $days = $defaults['days']; }
  46         $days = $wgRequest->getInt( 'days', $days );
  47
  48         $limit = $wgUser->getOption( 'rclimit' );
  49         if ( !$limit ) { $limit = $defaults['limit']; }
  50
  51         #       list( $limit, $offset ) = wfCheckLimits( 100, 'rclimit' );
  52         $limit = $wgRequest->getInt( 'limit', $limit );
  53
  54         /* order of selection: url > preferences > default */
  55         $hideminor = $wgRequest->getBool( 'hideminor', $wgUser->getOption( 'hideminor') ? true : $defaults['hideminor'] );
  56
  57
  58         # As a feed, use limited settings only
  59         if( $feedFormat ) {
  60                 global $wgFeedLimit;
  61                 if( $limit > $wgFeedLimit ) {
  62                         $options['limit'] = $wgFeedLimit;
  63                 }
  64
  65         } else {
  66
  67                 $namespace = $wgRequest->getIntOrNull( 'namespace' );
  68                 $invert = $wgRequest->getBool( 'invert', $defaults['invert'] );
  69                 $hidebots = $wgRequest->getBool( 'hidebots', $defaults['hidebots'] );
  70                 $hideliu = $wgRequest->getBool( 'hideliu', $defaults['hideliu'] );
  71                 $hidepatrolled = $wgRequest->getBool( 'hidepatrolled', $defaults['hidepatrolled'] );
  72                 $from = $wgRequest->getVal( 'from', $defaults['from'] );
  73
  74                 # Get query parameters from path
  75                 if( $par ) {
  76                         $bits = preg_split( '/\s*,\s*/', trim( $par ) );
  77                         foreach ( $bits as $bit ) {
  78                                 if ( 'hidebots' == $bit ) $hidebots = 1;
  79                                 if ( 'bots' == $bit ) $hidebots = 0;
  80                                 if ( 'hideminor' == $bit ) $hideminor = 1;
  81                                 if ( 'minor' == $bit ) $hideminor = 0;
  82                                 if ( 'hideliu' == $bit ) $hideliu = 1;
  83                                 if ( 'hidepatrolled' == $bit ) $hidepatrolled = 1;
  84
  85                                 if ( is_numeric( $bit ) ) {
  86                                         $limit = $bit;
  87                                 }
  88
  89                                 if ( preg_match( '/^limit=(\d+)$/', $bit, $m ) ) {
  90                                         $limit = $m[1];
  91                                 }
  92
  93                                 if ( preg_match( '/^days=(\d+)$/', $bit, $m ) ) {
  94                                         $days = $m[1];
  95                                 }
  96                         }
  97                 }
  98         }
  99
 100         if ( $limit < 0 || $limit > 5000 ) $limit = $defaults['limit'];
 101
 102
 103         # Database connection and caching
 104         $dbr =& wfGetDB( DB_SLAVE );
 105         extract( $dbr->tableNames( 'recentchanges', 'watchlist' ) );
 106
 107
 108         $cutoff_unixtime = time() - ( $days * 86400 );
 109         $cutoff_unixtime = $cutoff_unixtime - ($cutoff_unixtime % 86400);
 110         $cutoff = $dbr->timestamp( $cutoff_unixtime );
 111         if(preg_match('/^[0-9]{14}$/', $from) and $from > wfTimestamp(TS_MW,$cutoff)) {
 112                 $cutoff = $dbr->timestamp($from);
 113         } else {
 114                 $from = $defaults['from'];
 115         }
 116
 117         # 10 seconds server-side caching max
 118         $wgOut->setSquidMaxage( 10 );
 119
 120         # Get last modified date, for client caching
 121         # Don't use this if we are using the patrol feature, patrol changes don't update the timestamp
 122         $lastmod = $dbr->selectField( 'recentchanges', 'MAX(rc_timestamp)', false, $fname );
 123         if ( $feedFormat || !$wgUseRCPatrol ) {
 124                 if( $lastmod && $wgOut->checkLastModified( $lastmod ) ){
 125                         # Client cache fresh and headers sent, nothing more to do.
 126                         return;
 127                 }
 128         }
 129
 130         $hidem  = $hideminor ? 'AND rc_minor=0' : '';
 131         $hidem .= $hidebots ? ' AND rc_bot=0' : '';
 132         $hidem .= $hideliu ? ' AND rc_user=0' : '';
 133         $hidem .= $hidepatrolled ? ' AND rc_patrolled=0' : '';
 134         $hidem .= is_null( $namespace ) ?  '' : ' AND rc_namespace' . ($invert ? '!=' : '=') . $namespace;
 135
 136         // This is the big thing!
 137
 138         $uid = $wgUser->getID();
 139
 140         // Perform query
 141         $sql2 = "SELECT * FROM $recentchanges " .
 142           ($uid ? "LEFT OUTER JOIN $watchlist ON wl_user={$uid} AND wl_title=rc_title AND wl_namespace=rc_namespace " : "") .
 143           "WHERE rc_timestamp > '{$cutoff}' {$hidem} " .
 144           "ORDER BY rc_timestamp DESC";
 145         $sql2 = $dbr->limitResult($sql2, $limit, 0);
 146         $res = $dbr->query( $sql2, $fname );
 147
 148         // Fetch results, prepare a batch link existence check query
 149         $rows = array();
 150         $batch = new LinkBatch;
 151         while( $row = $dbr->fetchObject( $res ) ){
 152                 $rows[] = $row;
 153                 // User page link
 154                 $title = Title::makeTitleSafe( NS_USER, $row->rc_user_text );
 155                 $batch->addObj( $title );
 156
 157                 // User talk
 158                 $title = Title::makeTitleSafe( NS_USER_TALK, $row->rc_user_text );
 159                 $batch->addObj( $title );
 160
 161         }
 162         $dbr->freeResult( $res );
 163
 164         // Run existence checks
 165         $batch->execute( $wgLinkCache );
 166
 167         if( $feedFormat ) {
 168                 rcOutputFeed( $rows, $feedFormat, $limit, $hideminor, $lastmod );
 169         } else {
 170
 171                 # Web output...
 172
 173                 // Output header
 174                 if ( !$specialPage->including() ) {
 175                         $wgOut->addWikiText( wfMsgForContent( "recentchangestext" ) );
 176
 177                         // Dump everything here
 178                         $nondefaults = array();
 179
 180                         wfAppendToArrayIfNotDefault( 'days', $days, $defaults, $nondefaults);
 181                         wfAppendToArrayIfNotDefault( 'limit', $limit , $defaults, $nondefaults);
 182                         wfAppendToArrayIfNotDefault( 'hideminor', $hideminor, $defaults, $nondefaults);
 183                         wfAppendToArrayIfNotDefault( 'hidebots', $hidebots, $defaults, $nondefaults);
 184                         wfAppendToArrayIfNotDefault( 'hideliu', $hideliu, $defaults, $nondefaults);
 185                         wfAppendToArrayIfNotDefault( 'hidepatrolled', $hidepatrolled, $defaults, $nondefaults);
 186                         wfAppendToArrayIfNotDefault( 'from', $from, $defaults, $nondefaults);
 187                         wfAppendToArrayIfNotDefault( 'namespace', $namespace, $defaults, $nondefaults);
 188                         wfAppendToArrayIfNotDefault( 'invert', $invert, $defaults, $nondefaults);
 189
 190                         // Add end of the texts
 191                         $wgOut->addHTML( '<div class="rcoptions">' . rcOptionsPanel( $defaults, $nondefaults ) . "\n" );
 192                         $wgOut->addHTML( rcNamespaceForm( $namespace, $invert, $nondefaults) . '</div>'."\n");
 193                 }
 194
 195                 // And now for the content
 196                 $sk = $wgUser->getSkin();
 197                 $wgOut->setSyndicated( true );
 198
 199                 if ( $wgUser->getOption('usenewrc') ) {
 200                         $list =& new EnhancedChangesList( $sk );
 201                 } else {
 202                         $list =& new OldChangesList( $sk );
 203                 }
 204
 205                 $s = $list->beginRecentChangesList();
 206                 $counter = 1;
 207                 foreach( $rows as $obj ){
 208                         if( $limit == 0) {
 209                                 break;
 210                         }
 211
 212                         if ( ! ( $hideminor     && $obj->rc_minor     ) &&
 213                              ! ( $hidepatrolled && $obj->rc_patrolled ) ) {
 214                                 $rc = RecentChange::newFromRow( $obj );
 215                                 $rc->counter = $counter++;
 216
 217                                 if ($wgShowUpdatedMarker
 218                                         && !empty( $obj->wl_notificationtimestamp )
 219                                         && ($obj->rc_timestamp >= $obj->wl_notificationtimestamp)) {
 220                                                 $rc->notificationtimestamp = true;
 221                                 } else {
 222                                         $rc->notificationtimestamp = false;
 223                                 }
 224
 225                                 if ($wgRCShowWatchingUsers && $wgUser->getOption( 'shownumberswatching' )) {
 226                                         $sql3 = "SELECT COUNT(*) AS n FROM $watchlist WHERE wl_title='" . $dbr->strencode($obj->rc_title) ."' AND wl_namespace=$obj->rc_namespace" ;
 227                                         $res3 = $dbr->query( $sql3, 'wfSpecialRecentChanges');
 228                                         $x = $dbr->fetchObject( $res3 );
 229                                         $rc->numberofWatchingusers = $x->n;
 230                                 } else {
 231                                         $rc->numberofWatchingusers = 0;
 232                                 }
 233                                 $s .= $list->recentChangesLine( $rc, !empty( $obj->wl_user ) );
 234                                 --$limit;
 235                         }
 236                 }
 237                 $s .= $list->endRecentChangesList();
 238                 $wgOut->addHTML( $s );
 239         }
 240 }
 241
 242 function rcOutputFeed( $rows, $feedFormat, $limit, $hideminor, $lastmod ) {
 243         global $messageMemc, $wgDBname, $wgFeedCacheTimeout;
 244         global $wgFeedClasses, $wgTitle, $wgSitename, $wgContLanguageCode;
 245
 246         if( !isset( $wgFeedClasses[$feedFormat] ) ) {
 247                 wfHttpError( 500, "Internal Server Error", "Unsupported feed type." );
 248                 return false;
 249         }
 250
 251         $timekey = "$wgDBname:rcfeed:$feedFormat:timestamp";
 252         $key = "$wgDBname:rcfeed:$feedFormat:limit:$limit:minor:$hideminor";
 253
 254         $feedTitle = $wgSitename . ' - ' . wfMsgForContent( 'recentchanges' ) .
 255                 ' [' . $wgContLanguageCode . ']';
 256         $feed = new $wgFeedClasses[$feedFormat](
 257                 $feedTitle,
 258                 htmlspecialchars( wfMsgForContent( 'recentchangestext' ) ),
 259                 $wgTitle->getFullUrl() );
 260
 261         /**
 262          * Bumping around loading up diffs can be pretty slow, so where
 263          * possible we want to cache the feed output so the next visitor
 264          * gets it quick too.
 265          */
 266         $cachedFeed = false;
 267         if( $feedLastmod = $messageMemc->get( $timekey ) ) {
 268                 /**
 269                  * If the cached feed was rendered very recently, we may
 270                  * go ahead and use it even if there have been edits made
 271                  * since it was rendered. This keeps a swarm of requests
 272                  * from being too bad on a super-frequently edited wiki.
 273                  */
 274                 if( time() - wfTimestamp( TS_UNIX, $feedLastmod )
 275                                 < $wgFeedCacheTimeout
 276                         || wfTimestamp( TS_UNIX, $feedLastmod )
 277                                 > wfTimestamp( TS_UNIX, $lastmod ) ) {
 278                         wfDebug( "RC: loading feed from cache ($key; $feedLastmod; $lastmod)...\n" );
 279                         $cachedFeed = $messageMemc->get( $key );
 280                 } else {
 281                         wfDebug( "RC: cached feed timestamp check failed ($feedLastmod; $lastmod)\n" );
 282                 }
 283         }
 284         if( is_string( $cachedFeed ) ) {
 285                 wfDebug( "RC: Outputting cached feed\n" );
 286                 $feed->httpHeaders();
 287                 echo $cachedFeed;
 288         } else {
 289                 wfDebug( "RC: rendering new feed and caching it\n" );
 290                 ob_start();
 291                 rcDoOutputFeed( $rows, $feed );
 292                 $cachedFeed = ob_get_contents();
 293                 ob_end_flush();
 294
 295                 $expire = 3600 * 24; # One day
 296                 $messageMemc->set( $key, $cachedFeed );
 297                 $messageMemc->set( $timekey, wfTimestamp( TS_MW ), $expire );
 298         }
 299         return true;
 300 }
 301
 302 function rcDoOutputFeed( $rows, &$feed ) {
 303         global $wgSitename, $wgFeedClasses, $wgContLanguageCode;
 304
 305         $feed->outHeader();
 306
 307         # Merge adjacent edits by one user
 308         $sorted = array();
 309         $n = 0;
 310         foreach( $rows as $obj ) {
 311                 if( $n > 0 &&
 312                         $obj->rc_namespace >= 0 &&
 313                         $obj->rc_cur_id == $sorted[$n-1]->rc_cur_id &&
 314                         $obj->rc_user_text == $sorted[$n-1]->rc_user_text ) {
 315                         $sorted[$n-1]->rc_last_oldid = $obj->rc_last_oldid;
 316                 } else {
 317                         $sorted[$n] = $obj;
 318                         $n++;
 319                 }
 320                 $first = false;
 321         }
 322
 323         foreach( $sorted as $obj ) {
 324                 $title = Title::makeTitle( $obj->rc_namespace, $obj->rc_title );
 325                 $talkpage = $title->getTalkPage();
 326                 $item = new FeedItem(
 327                         $title->getPrefixedText(),
 328                         rcFormatDiff( $obj ),
 329                         $title->getFullURL(),
 330                         $obj->rc_timestamp,
 331                         $obj->rc_user_text,
 332                         $talkpage->getFullURL()
 333                         );
 334                 $feed->outItem( $item );
 335         }
 336         $feed->outFooter();
 337 }
 338
 339 /**
 340  *
 341  */
 342 function rcCountLink( $lim, $d, $page='Recentchanges', $more='' ) {
 343         global $wgUser, $wgLang, $wgContLang;
 344         $sk = $wgUser->getSkin();
 345         $s = $sk->makeKnownLink( $wgContLang->specialPage( $page ),
 346           ($lim ? $wgLang->formatNum( "{$lim}" ) : wfMsg( 'recentchangesall' ) ), "{$more}" .
 347           ($d ? "days={$d}&" : '') . 'limit='.$lim );
 348         return $s;
 349 }
 350
 351 /**
 352  *
 353  */
 354 function rcDaysLink( $lim, $d, $page='Recentchanges', $more='' ) {
 355         global $wgUser, $wgLang, $wgContLang;
 356         $sk = $wgUser->getSkin();
 357         $s = $sk->makeKnownLink( $wgContLang->specialPage( $page ),
 358           ($d ? $wgLang->formatNum( "{$d}" ) : wfMsg( 'recentchangesall' ) ), $more.'days='.$d .
 359           ($lim ? '&limit='.$lim : '') );
 360         return $s;
 361 }
 362
 363 /**
 364  * Used by Recentchangeslinked
 365  */
 366 function rcDayLimitLinks( $days, $limit, $page='Recentchanges', $more='', $doall = false, $minorLink = '',
 367         $botLink = '', $liuLink = '', $patrLink = '' ) {
 368         if ($more != '') $more .= '&';
 369         $cl = rcCountLink( 50, $days, $page, $more ) . ' | ' .
 370           rcCountLink( 100, $days, $page, $more  ) . ' | ' .
 371           rcCountLink( 250, $days, $page, $more  ) . ' | ' .
 372           rcCountLink( 500, $days, $page, $more  ) .
 373           ( $doall ? ( ' | ' . rcCountLink( 0, $days, $page, $more ) ) : '' );
 374         $dl = rcDaysLink( $limit, 1, $page, $more  ) . ' | ' .
 375           rcDaysLink( $limit, 3, $page, $more  ) . ' | ' .
 376           rcDaysLink( $limit, 7, $page, $more  ) . ' | ' .
 377           rcDaysLink( $limit, 14, $page, $more  ) . ' | ' .
 378           rcDaysLink( $limit, 30, $page, $more  ) .
 379           ( $doall ? ( ' | ' . rcDaysLink( $limit, 0, $page, $more ) ) : '' );
 380         $shm = wfMsg( 'showhideminor', $minorLink, $botLink, $liuLink, $patrLink );
 381         $note = wfMsg( 'rclinks', $cl, $dl, $shm );
 382         return $note;
 383 }
 384
 385
 386 /**
 387  * Makes change an option link which carries all the other options
 388  */
 389 function makeOptionsLink( $title, $override, $options ) {
 390         global $wgUser, $wgLang, $wgContLang;
 391         $sk = $wgUser->getSkin();
 392         return $sk->makeKnownLink( $wgContLang->specialPage( 'Recentchanges' ),
 393                 $title, wfArrayToCGI( $override, $options ) );
 394 }
 395
 396 /**
 397  * Creates the options panel
 398  */
 399 function rcOptionsPanel( $defaults, $nondefaults ) {
 400         global $wgLang;
 401
 402         $options = $nondefaults + $defaults;
 403
 404         if( $options['from'] )
 405                 $note = wfMsg( 'rcnotefrom', $wgLang->formatNum( $options['limit'] ), $wgLang->timeanddate( $options['from'], true ) );
 406         else
 407                 $note = wfMsg( 'rcnote', $wgLang->formatNum( $options['limit'] ), $wgLang->formatNum( $options['days'] ) );
 408
 409         // limit links
 410         $cl = '';
 411         $options_limit = array(50, 100, 250, 500);
 412         $i = 0;
 413         while ( $i+1 < count($options_limit) ) {
 414                 $cl .=  makeOptionsLink( $options_limit[$i], array( 'limit' => $options_limit[$i] ), $nondefaults) . ' | ' ;
 415                 $i++;
 416         }
 417         $cl .=  makeOptionsLink( $options_limit[$i], array( 'limit' => $options_limit[$i] ), $nondefaults) ;
 418
 419         // day links, reset 'from' to none
 420         $dl = '';
 421         $options_days = array(1, 3, 7, 14, 30);
 422         $i = 0;
 423         while ( $i+1 < count($options_days) ) {
 424                 $dl .=  makeOptionsLink( $options_days[$i], array( 'days' => $options_days[$i], 'from' => '' ), $nondefaults) . ' | ' ;
 425                 $i++;
 426         }
 427         $dl .=  makeOptionsLink( $options_days[$i], array( 'days' => $options_days[$i], 'from' => '' ), $nondefaults) ;
 428
 429         // show/hide links
 430         $showhide = array( wfMsg( 'show' ), wfMsg( 'hide' ));
 431         $minorLink = makeOptionsLink( $showhide[1-$options['hideminor']],
 432                 array( 'hideminor' => 1-$options['hideminor'] ), $nondefaults);
 433         $botLink = makeOptionsLink( $showhide[1-$options['hidebots']],
 434                 array( 'hidebots' => 1-$options['hidebots'] ), $nondefaults);
 435         $liuLink   = makeOptionsLink( $showhide[1-$options['hideliu']],
 436                 array( 'hideliu' => 1-$options['hideliu'] ), $nondefaults);
 437         $patrLink  = makeOptionsLink( $showhide[1-$options['hidepatrolled']],
 438                 array( 'hidepatrolled' => 1-$options['hidepatrolled'] ), $nondefaults);
 439
 440         $hl = wfMsg( 'showhideminor', $minorLink, $botLink, $liuLink, $patrLink );
 441
 442         // show from this onward link
 443         $now = $wgLang->timeanddate( wfTimestampNow(), true );
 444         $tl =  makeOptionsLink( $now, array( 'from' => wfTimestampNow()), $nondefaults );
 445
 446         $rclinks = wfMsg( 'rclinks', $cl, $dl, $hl );
 447         $rclistfrom = wfMsg( 'rclistfrom', $tl );
 448         return "$note<br />$rclinks<br />$rclistfrom";
 449
 450 }
 451
 452 /**<F2>
 453  * Creates the choose namespace selection
 454  *
 455  * @access private
 456  *
 457  * @param mixed $namespace The key of the currently selected namespace, empty string
 458  *              if there is none
 459  * @param bool $invert Whether to invert the namespace selection
 460  * @param array $nondefaults An array of non default options to be remembered
 461  *
 462  * @return string
 463  */
 464 function rcNamespaceForm ( $namespace, $invert, $nondefaults ) {
 465         global $wgContLang, $wgScript;
 466         $t = Title::makeTitle( NS_SPECIAL, 'Recentchanges' );
 467
 468         $namespaceselect = HTMLnamespaceselector($namespace, '');
 469         $submitbutton = '<input type="submit" value="' . wfMsgHtml( 'allpagessubmit' ) . "\" />\n";
 470         $invertbox = "<input type='checkbox' name='invert' value='1' id='nsinvert'" . ( $invert ? ' checked="checked"' : '' ) . ' />';
 471
 472         $out = "<div class='namespacesettings'><form method='get' action='{$wgScript}'>\n";
 473
 474         foreach ( $nondefaults as $key => $value ) {
 475                 if ($key != 'namespace' && $key != 'invert')
 476                         $out .= wfElement('input', array( 'type' => 'hidden', 'name' => $key, 'value' => $value));
 477         }
 478
 479         $out .= '<input type="hidden" name="title" value="'.$t->getPrefixedText().'" />';
 480         $out .= "
 481 <div id='nsselect' class='recentchanges'>
 482         <label for='namespace'>" . wfMsgHtml('namespace') . "</label>
 483         {$namespaceselect}{$submitbutton}{$invertbox} <label for='nsinvert'>" . wfMsgHtml('invert') . "</label>\n</div>";
 484         $out .= '</form></div>';
 485         return $out;
 486 }
 487
 488
 489 /**
 490  * Format a diff for the newsfeed
 491  */
 492 function rcFormatDiff( $row ) {
 493         $fname = 'rcFormatDiff';
 494         wfProfileIn( $fname );
 495
 496         require_once( 'DifferenceEngine.php' );
 497         $comment = '<p>' . htmlspecialchars( $row->rc_comment ) . "</p>\n";
 498
 499         if( $row->rc_namespace >= 0 ) {
 500                 global $wgContLang;
 501
 502                 #$diff =& new DifferenceEngine( $row->rc_this_oldid, $row->rc_last_oldid, $row->rc_id );
 503                 #$diff->showDiffPage();
 504
 505                 $titleObj = Title::makeTitle( $row->rc_namespace, $row->rc_title );
 506                 $dbr =& wfGetDB( DB_SLAVE );
 507                 $newrev = Revision::newFromTitle( $titleObj, $row->rc_this_oldid );
 508                 if( $newrev ) {
 509                         $newtext = $newrev->getText();
 510                 } else {
 511                         $diffText = "<p>Can't load revision $row->rc_this_oldid</p>";
 512                         wfProfileOut( $fname );
 513                         return $comment . $diffText;
 514                 }
 515
 516                 if( $row->rc_last_oldid ) {
 517                         wfProfileIn( "$fname-dodiff" );
 518                         $oldrev =& Revision::newFromId( $row->rc_last_oldid );
 519                         if( !$oldrev ) {
 520                                 $diffText = "<p>Can't load old revision $row->rc_last_oldid</p>";
 521                                 wfProfileOut( $fname );
 522                                 return $comment . $diffText;
 523                         }
 524                         $oldtext = $oldrev->getText();
 525
 526                         # Old entries may contain illegal characters
 527                         # which will damage output
 528                         $oldtext = UtfNormal::cleanUp( $oldtext );
 529
 530                         global $wgFeedDiffCutoff;
 531                         if( strlen( $newtext ) > $wgFeedDiffCutoff ||
 532                                 strlen( $oldtext ) > $wgFeedDiffCutoff ) {
 533                                 $diffLink = $titleObj->escapeFullUrl(
 534                                         'diff=' . $row->rc_this_oldid .
 535                                         '&oldid=' . $row->rc_last_oldid );
 536                                 $diffText = '<a href="' .
 537                                         $diffLink .
 538                                         '">' .
 539                                         htmlspecialchars( wfMsgForContent( 'difference' ) ) .
 540                                         '</a>';
 541                         } else {
 542                                 $diffText = DifferenceEngine::getDiff( $oldtext, $newtext,
 543                                   wfMsg( 'revisionasof', $wgContLang->timeanddate( $row->rc_timestamp ) ),
 544                                   wfMsg( 'currentrev' ) );
 545                         }
 546                         wfProfileOut( "$fname-dodiff" );
 547                 } else {
 548                         $diffText = '<p><b>' . wfMsg( 'newpage' ) . '</b></p>' .
 549                                 '<div>' . nl2br( htmlspecialchars( $newtext ) ) . '</div>';
 550                 }
 551
 552                 wfProfileOut( $fname );
 553                 return $comment . $diffText;
 554         }
 555
 556         wfProfileOut( $fname );
 557         return $comment;
 558 }
 559
 560 ?>