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 ) {
  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' => $wgUser->getDefaultOption('rclimit'),
  32         /* bool */ 'hideminor' => false,
  33         /* bool */ 'hidebots' => true,
  34         /* bool */ 'hideliu' => false,
  35         /* bool */ 'hidepatrolled' => false,
  36         /* text */ 'from' => '',
  37         /* text */ 'namespace' => '',
  38         /* bool */ 'invert' => false,
  39         );
  40
  41         extract($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         if ( $limit < 0 || $limit > 5000 ) $limit = $defaults['limit'];
  54
  55         /* order of selection: url > preferences > default */
  56         $hideminor = $wgRequest->getBool( 'hideminor', $wgUser->getOption( 'hideminor') ? true : $defaults['hideminor'] );
  57
  58
  59         # As a feed, use limited settings only
  60         if( $feedFormat ) {
  61                 global $wgFeedLimit;
  62                 if( $limit > $wgFeedLimit ) {
  63                         $options['limit'] = $wgFeedLimit;
  64                 }
  65
  66         } else {
  67
  68                 $namespace = $wgRequest->getVal( 'namespace', $defaults['namespace'] );
  69                 $invert = $wgRequest->getBool( 'invert', $defaults['invert'] );
  70                 $hidebots = $wgRequest->getBool( 'hidebots', $defaults['hidebots'] );
  71                 $hideliu = $wgRequest->getBool( 'hideliu', $defaults['hideliu'] );
  72                 $hidepatrolled = $wgRequest->getBool( 'hidepatrolled', $defaults['hidepatrolled'] );
  73                 $from = $wgRequest->getVal( 'from', $defaults['from'] );
  74
  75                 # Get query parameters from path
  76                 if( $par ) {
  77                         $bits = preg_split( '/\s*,\s*/', trim( $par ) );
  78                         if( in_array( 'hidebots', $bits ) ) $hidebots = 1;
  79                         if( in_array( 'bots', $bits ) ) $hidebots = 0;
  80                         if( in_array( 'hideminor', $bits ) ) $hideminor = 1;
  81                         if( in_array( 'minor', $bits ) ) $hideminor = 0;
  82                         if( in_array( 'hideliu', $bits) ) $hideliu = 1;
  83                         if( in_array( 'hidepatrolled', $bits) ) $hidepatrolled = 1;
  84                 }
  85         }
  86
  87
  88         # Database connection and caching
  89         $dbr =& wfGetDB( DB_SLAVE );
  90         extract( $dbr->tableNames( 'recentchanges', 'watchlist' ) );
  91
  92
  93         $cutoff_unixtime = time() - ( $days * 86400 );
  94         $cutoff_unixtime = $cutoff_unixtime - ($cutoff_unixtime % 86400);
  95         $cutoff = $dbr->timestamp( $cutoff_unixtime );
  96         if(preg_match('/^[0-9]{14}$/', $from) and $from > wfTimestamp(TS_MW,$cutoff)) {
  97                 $cutoff = $dbr->timestamp($from);
  98         } else {
  99                 $from = $defaults['from'];
 100         }
 101
 102         # 10 seconds server-side caching max
 103         $wgOut->setSquidMaxage( 10 );
 104
 105         # Get last modified date, for client caching
 106         # Don't use this if we are using the patrol feature, patrol changes don't update the timestamp
 107         $lastmod = $dbr->selectField( 'recentchanges', 'MAX(rc_timestamp)', false, $fname );
 108         if ( $feedFormat || !$wgUseRCPatrol ) {
 109                 if( $lastmod && $wgOut->checkLastModified( $lastmod ) ){
 110                         # Client cache fresh and headers sent, nothing more to do.
 111                         return;
 112                 }
 113         }
 114
 115         $hidem  = $hideminor ? 'AND rc_minor=0' : '';
 116         $hidem .= $hidebots ? ' AND rc_bot=0' : '';
 117         $hidem .= $hideliu ? ' AND rc_user=0' : '';
 118         $hidem .= $hidepatrolled ? ' AND rc_patrolled=0' : '';
 119         $hidem .= $namespace === '' ?  ''       :' AND rc_namespace' . ($invert ? '!=' : '=') . $namespace;
 120
 121         // This is the big thing!
 122
 123         $uid = $wgUser->getID();
 124
 125         // Perform query
 126         $sql2 = "SELECT *" . ($uid ? ",wl_user,wl_notificationtimestamp" : "") . " FROM $recentchanges " .
 127           ($uid ? "LEFT OUTER JOIN $watchlist ON wl_user={$uid} AND wl_title=rc_title AND wl_namespace=rc_namespace " : "") .
 128           "WHERE rc_timestamp > '{$cutoff}' {$hidem} " .
 129           "ORDER BY rc_timestamp DESC LIMIT {$limit}";
 130         $res = $dbr->query( $sql2, $fname );
 131
 132         // Fetch results, prepare a batch link existence check query
 133         $rows = array();
 134         $batch = new LinkBatch;
 135         while( $row = $dbr->fetchObject( $res ) ){
 136                 $rows[] = $row;
 137                 // User page link
 138                 $title = Title::makeTitleSafe( NS_USER, $row->rc_user_text );
 139                 $batch->addObj( $title );
 140
 141                 // User talk
 142                 $title = Title::makeTitleSafe( NS_USER_TALK, $row->rc_user_text );
 143                 $batch->addObj( $title );
 144
 145         }
 146         $dbr->freeResult( $res );
 147
 148         // Run existence checks
 149         $batch->execute( $wgLinkCache );
 150
 151         if( $feedFormat ) {
 152                 rcOutputFeed( $rows, $feedFormat, $limit, $hideminor, $lastmod );
 153         } else {
 154
 155                 # Web output...
 156
 157                 // Output header
 158                 $wgOut->addWikiText( wfMsgForContent( "recentchangestext" ) );
 159
 160                 // Dump everything here
 161                 $nondefaults = array();
 162
 163                 appendToArrayIfNotDefault( 'days', $days, $defaults, $nondefaults);
 164                 appendToArrayIfNotDefault( 'limit', $limit , $defaults, $nondefaults);
 165                 appendToArrayIfNotDefault( 'hideminor', $hideminor, $defaults, $nondefaults);
 166                 appendToArrayIfNotDefault( 'hidebots', $hidebots, $defaults, $nondefaults);
 167                 appendToArrayIfNotDefault( 'hideliu', $hideliu, $defaults, $nondefaults);
 168                 appendToArrayIfNotDefault( 'hidepatrolled', $hidepatrolled, $defaults, $nondefaults);
 169                 appendToArrayIfNotDefault( 'from', $from, $defaults, $nondefaults);
 170                 appendToArrayIfNotDefault( 'namespace', $namespace, $defaults, $nondefaults);
 171                 appendToArrayIfNotDefault( 'invert', $invert, $defaults, $nondefaults);
 172
 173                 // Add end of the texts
 174                 $wgOut->addHTML( '<div class="rcoptions">' . rcOptionsPanel( $defaults, $nondefaults ) );
 175                 $wgOut->addHTML( namespaceForm( $namespace, $invert, $nondefaults) . '</div>');
 176
 177                 // And now for the content
 178                 $sk = $wgUser->getSkin();
 179                 $wgOut->setSyndicated( true );
 180                 $list =& new ChangesList( $sk );
 181                 $s = $list->beginRecentChangesList();
 182                 $counter = 1;
 183                 foreach( $rows as $obj ){
 184                         if( $limit == 0) {
 185                                 break;
 186                         }
 187
 188                         if ( ! ( $hideminor     && $obj->rc_minor     ) &&
 189                              ! ( $hidepatrolled && $obj->rc_patrolled ) ) {
 190                                 $rc = RecentChange::newFromRow( $obj );
 191                                 $rc->counter = $counter++;
 192
 193                                 if ($wgShowUpdatedMarker
 194                                         && $wgUser->getOption( 'showupdated' )
 195                                         && !empty( $obj->wl_notificationtimestamp )
 196                                         && ($obj->rc_timestamp >= $obj->wl_notificationtimestamp)) {
 197                                                 $rc->notificationtimestamp = true;
 198                                 } else {
 199                                         $rc->notificationtimestamp = false;
 200                                 }
 201
 202                                 if ($wgRCShowWatchingUsers && $wgUser->getOption( 'shownumberswatching' )) {
 203                                         $sql3 = "SELECT COUNT(*) AS n FROM $watchlist WHERE wl_title='" . $dbr->strencode($obj->rc_title) ."' AND wl_namespace=$obj->rc_namespace" ;
 204                                         $res3 = $dbr->query( $sql3, 'wfSpecialRecentChanges');
 205                                         $x = $dbr->fetchObject( $res3 );
 206                                         $rc->numberofWatchingusers = $x->n;
 207                                 } else {
 208                                         $rc->numberofWatchingusers = 0;
 209                                 }
 210                                 $s .= $list->recentChangesLine( $rc, !empty( $obj->wl_user ) );
 211                                 --$limit;
 212                         }
 213                 }
 214                 $s .= $list->endRecentChangesList();
 215                 $wgOut->addHTML( $s );
 216         }
 217 }
 218
 219 function rcOutputFeed( $rows, $feedFormat, $limit, $hideminor, $lastmod ) {
 220         global $messageMemc, $wgDBname, $wgFeedCacheTimeout;
 221         global $wgFeedClasses, $wgTitle, $wgSitename, $wgContLanguageCode;
 222
 223         if( !isset( $wgFeedClasses[$feedFormat] ) ) {
 224                 wfHttpError( 500, "Internal Server Error", "Unsupported feed type." );
 225                 return false;
 226         }
 227
 228         $timekey = "$wgDBname:rcfeed:$feedFormat:timestamp";
 229         $key = "$wgDBname:rcfeed:$feedFormat:limit:$limit:minor:$hideminor";
 230
 231         $feedTitle = $wgSitename . ' - ' . wfMsgForContent( 'recentchanges' ) .
 232                 ' [' . $wgContLanguageCode . ']';
 233         $feed = new $wgFeedClasses[$feedFormat](
 234                 $feedTitle,
 235                 htmlspecialchars( wfMsgForContent( 'recentchangestext' ) ),
 236                 $wgTitle->getFullUrl() );
 237
 238         /**
 239          * Bumping around loading up diffs can be pretty slow, so where
 240          * possible we want to cache the feed output so the next visitor
 241          * gets it quick too.
 242          */
 243         $cachedFeed = false;
 244         if( $feedLastmod = $messageMemc->get( $timekey ) ) {
 245                 /**
 246                  * If the cached feed was rendered very recently, we may
 247                  * go ahead and use it even if there have been edits made
 248                  * since it was rendered. This keeps a swarm of requests
 249                  * from being too bad on a super-frequently edited wiki.
 250                  */
 251                 if( time() - wfTimestamp( TS_UNIX, $feedLastmod )
 252                                 < $wgFeedCacheTimeout
 253                         || wfTimestamp( TS_UNIX, $feedLastmod )
 254                                 > wfTimestamp( TS_UNIX, $lastmod ) ) {
 255                         wfDebug( "RC: loading feed from cache ($key; $feedLastmod; $lastmod)...\n" );
 256                         $cachedFeed = $messageMemc->get( $key );
 257                 } else {
 258                         wfDebug( "RC: cached feed timestamp check failed ($feedLastmod; $lastmod)\n" );
 259                 }
 260         }
 261         if( is_string( $cachedFeed ) ) {
 262                 wfDebug( "RC: Outputting cached feed\n" );
 263                 $feed->httpHeaders();
 264                 echo $cachedFeed;
 265         } else {
 266                 wfDebug( "RC: rendering new feed and caching it\n" );
 267                 ob_start();
 268                 rcDoOutputFeed( $rows, $feed );
 269                 $cachedFeed = ob_get_contents();
 270                 ob_end_flush();
 271
 272                 $expire = 3600 * 24; # One day
 273                 $messageMemc->set( $key, $cachedFeed );
 274                 $messageMemc->set( $timekey, wfTimestamp( TS_MW ), $expire );
 275         }
 276         return true;
 277 }
 278
 279 function rcDoOutputFeed( $rows, &$feed ) {
 280         global $wgSitename, $wgFeedClasses, $wgContLanguageCode;
 281
 282         $feed->outHeader();
 283
 284         # Merge adjacent edits by one user
 285         $sorted = array();
 286         $n = 0;
 287         foreach( $rows as $obj ) {
 288                 if( $n > 0 &&
 289                         $obj->rc_namespace >= 0 &&
 290                         $obj->rc_cur_id == $sorted[$n-1]->rc_cur_id &&
 291                         $obj->rc_user_text == $sorted[$n-1]->rc_user_text ) {
 292                         $sorted[$n-1]->rc_last_oldid = $obj->rc_last_oldid;
 293                 } else {
 294                         $sorted[$n] = $obj;
 295                         $n++;
 296                 }
 297                 $first = false;
 298         }
 299
 300         foreach( $sorted as $obj ) {
 301                 $title = Title::makeTitle( $obj->rc_namespace, $obj->rc_title );
 302                 $talkpage = $title->getTalkPage();
 303                 $item = new FeedItem(
 304                         $title->getPrefixedText(),
 305                         rcFormatDiff( $obj ),
 306                         $title->getFullURL(),
 307                         $obj->rc_timestamp,
 308                         $obj->rc_user_text,
 309                         $talkpage->getFullURL()
 310                         );
 311                 $feed->outItem( $item );
 312         }
 313         $feed->outFooter();
 314 }
 315
 316 /**
 317  *
 318  */
 319 function rcCountLink( $lim, $d, $page='Recentchanges', $more='' ) {
 320         global $wgUser, $wgLang, $wgContLang;
 321         $sk = $wgUser->getSkin();
 322         $s = $sk->makeKnownLink( $wgContLang->specialPage( $page ),
 323           ($lim ? $wgLang->formatNum( "{$lim}" ) : wfMsg( 'recentchangesall' ) ), "{$more}" .
 324           ($d ? "days={$d}&" : '') . 'limit='.$lim );
 325         return $s;
 326 }
 327
 328 /**
 329  *
 330  */
 331 function rcDaysLink( $lim, $d, $page='Recentchanges', $more='' ) {
 332         global $wgUser, $wgLang, $wgContLang;
 333         $sk = $wgUser->getSkin();
 334         $s = $sk->makeKnownLink( $wgContLang->specialPage( $page ),
 335           ($d ? $wgLang->formatNum( "{$d}" ) : wfMsg( 'recentchangesall' ) ), $more.'days='.$d .
 336           ($lim ? '&limit='.$lim : '') );
 337         return $s;
 338 }
 339
 340 /**
 341  * Used by Recentchangeslinked
 342  */
 343 function rcDayLimitLinks( $days, $limit, $page='Recentchanges', $more='', $doall = false, $minorLink = '',
 344         $botLink = '', $liuLink = '', $patrLink = '' ) {
 345         if ($more != '') $more .= '&';
 346         $cl = rcCountLink( 50, $days, $page, $more ) . ' | ' .
 347           rcCountLink( 100, $days, $page, $more  ) . ' | ' .
 348           rcCountLink( 250, $days, $page, $more  ) . ' | ' .
 349           rcCountLink( 500, $days, $page, $more  ) .
 350           ( $doall ? ( ' | ' . rcCountLink( 0, $days, $page, $more ) ) : '' );
 351         $dl = rcDaysLink( $limit, 1, $page, $more  ) . ' | ' .
 352           rcDaysLink( $limit, 3, $page, $more  ) . ' | ' .
 353           rcDaysLink( $limit, 7, $page, $more  ) . ' | ' .
 354           rcDaysLink( $limit, 14, $page, $more  ) . ' | ' .
 355           rcDaysLink( $limit, 30, $page, $more  ) .
 356           ( $doall ? ( ' | ' . rcDaysLink( $limit, 0, $page, $more ) ) : '' );
 357         $shm = wfMsg( 'showhideminor', $minorLink, $botLink, $liuLink, $patrLink );
 358         $note = wfMsg( 'rclinks', $cl, $dl, $shm );
 359         return $note;
 360 }
 361
 362
 363 /**
 364  * Makes change an option link which carries all the other options
 365  */
 366 function makeOptionsLink( $title, $override, $options ) {
 367         global $wgUser, $wgLang, $wgContLang;
 368         $sk = $wgUser->getSkin();
 369         return $sk->makeKnownLink( $wgContLang->specialPage( 'Recentchanges' ),
 370                 $title, wfArrayToCGI( $override, $options ) );
 371 }
 372
 373 /**
 374  * Creates the options panel
 375  */
 376 function rcOptionsPanel( $defaults, $nondefaults ) {
 377         global $wgLang;
 378
 379         $options = $nondefaults + $defaults;
 380
 381         if( $options['from'] )
 382                 $note = wfMsg( 'rcnotefrom', $wgLang->formatNum( $options['limit'] ), $wgLang->timeanddate( $options['from'], true ) );
 383         else
 384                 $note = wfMsg( 'rcnote', $wgLang->formatNum( $options['limit'] ), $wgLang->formatNum( $options['days'] ) );
 385
 386         // limit links
 387         $cl = '';
 388         $options_limit = array(50, 100, 250, 500);
 389         $i = 0;
 390         while ( $i+1 < count($options_limit) ) {
 391                 $cl .=  makeOptionsLink( $options_limit[$i], array( 'limit' => $options_limit[$i] ), $nondefaults) . ' | ' ;
 392                 $i++;
 393         }
 394         $cl .=  makeOptionsLink( $options_limit[$i], array( 'limit' => $options_limit[$i] ), $nondefaults) ;
 395
 396         // day links, reset 'from' to none
 397         $dl = '';
 398         $options_days = array(1, 3, 7, 14, 30);
 399         $i = 0;
 400         while ( $i+1 < count($options_days) ) {
 401                 $dl .=  makeOptionsLink( $options_days[$i], array( 'days' => $options_days[$i], 'from' => '' ), $nondefaults) . ' | ' ;
 402                 $i++;
 403         }
 404         $dl .=  makeOptionsLink( $options_days[$i], array( 'days' => $options_days[$i], 'from' => '' ), $nondefaults) ;
 405
 406         // show/hide links
 407         $showhide = array( wfMsg( 'show' ), wfMsg( 'hide' ));
 408         $minorLink = makeOptionsLink( $showhide[1-$options['hideminor']],
 409                 array( 'hideminor' => 1-$options['hideminor'] ), $nondefaults);
 410         $botLink = makeOptionsLink( $showhide[1-$options['hidebots']],
 411                 array( 'hidebots' => 1-$options['hidebots'] ), $nondefaults);
 412         $liuLink   = makeOptionsLink( $showhide[1-$options['hideliu']],
 413                 array( 'hideliu' => 1-$options['hideliu'] ), $nondefaults);
 414         $patrLink  = makeOptionsLink( $showhide[1-$options['hidepatrolled']],
 415                 array( 'hidepatrolled' => 1-$options['hidepatrolled'] ), $nondefaults);
 416
 417         $hl = wfMsg( 'showhideminor', $minorLink, $botLink, $liuLink, $patrLink );
 418
 419         // show from this onward link
 420         $now = $wgLang->timeanddate( wfTimestampNow(), true );
 421         $tl =  makeOptionsLink( $now, array( 'from' => wfTimestampNow()), $nondefaults );
 422
 423         $rclinks = wfMsg( 'rclinks', $cl, $dl, $hl );
 424         $rclistfrom = wfMsg( 'rclistfrom', $tl );
 425         return "$note<br />$rclinks<br />$rclistfrom";
 426
 427 }
 428
 429 /**<F2>
 430  * Creates the choose namespace selection
 431  *
 432  * @access private
 433  *
 434  * @param mixed $namespace The key of the currently selected namespace, empty string
 435  *              if there is none
 436  * @param bool $invert Whether to invert the namespace selection
 437  * @param array $nondefaults An array of non default options to be remembered
 438  *
 439  * @return string
 440  */
 441 function namespaceForm ( $namespace, $invert, $nondefaults ) {
 442         global $wgContLang, $wgScript;
 443         $t = Title::makeTitle( NS_SPECIAL, 'Recentchanges' );
 444
 445         $namespaceselect = "<select name='namespace' id='nsselectbox'>";
 446         $namespaceselect .= '<option value="" ' . ($namespace === '' ? ' selected="selected"' : '') . '>' . wfMsg( 'contributionsall' ) . '</option>';
 447         $arr =  $wgContLang->getFormattedNamespaces();
 448         foreach ( $arr as $ns => $name ) {
 449                 if( $ns < NS_MAIN )
 450                         continue;
 451                 $n = $ns === NS_MAIN ? wfMsg ( 'blanknamespace' ) : $name;
 452                 $sel = $namespace === (string) $ns ? ' selected="selected"' : '';
 453                 $namespaceselect .= "<option value='$ns'$sel>$n</option>";
 454         }
 455         $namespaceselect .= '</select>';
 456
 457         $out = '';
 458         $out .= "<div class='namespaceselector'><form method='get' action='{$wgScript}'>\n";
 459         foreach ( $nondefaults as $key => $value ) {
 460                 if ($key != 'namespace' && $key != 'invert')
 461                         $out .= "<input type='hidden' name='$key' value='$value' />";
 462         }
 463
 464         $submitbutton = '<input type="submit" value="' . wfMsg( 'allpagessubmit' ) . '" />';
 465         $invertbox = "<input type='checkbox' name='invert' value='1' id='nsinvert'" . ( $invert ? ' checked="checked"' : '' ) . ' />';
 466
 467
 468         $out .= '<input type="hidden" name="title" value="'.$t->getPrefixedText().'" />';
 469         $out .= "
 470 <div id='nsselect' class='recentchanges'>
 471         <label for='nsselectbox'>" . wfMsg('namespace') . "</label>
 472         $namespaceselect $submitbutton $invertbox <label for='nsinvert'>" . wfMsg('invert') . "</label>
 473 </div>";
 474         $out .= '</form></div>';
 475         return $out;
 476 }
 477
 478
 479 /**
 480  * Format a diff for the newsfeed
 481  */
 482 function rcFormatDiff( $row ) {
 483         $fname = 'rcFormatDiff';
 484         wfProfileIn( $fname );
 485
 486         require_once( 'DifferenceEngine.php' );
 487         $comment = "<p>" . htmlspecialchars( $row->rc_comment ) . "</p>\n";
 488
 489         if( $row->rc_namespace >= 0 ) {
 490                 global $wgContLang;
 491
 492                 #$diff =& new DifferenceEngine( $row->rc_this_oldid, $row->rc_last_oldid, $row->rc_id );
 493                 #$diff->showDiffPage();
 494
 495                 $titleObj = Title::makeTitle( $row->rc_namespace, $row->rc_title );
 496                 $dbr =& wfGetDB( DB_SLAVE );
 497                 $newrev =& Revision::newFromTitle( $titleObj, $row->rc_this_oldid );
 498                 if( $newrev ) {
 499                         $newtext = $newrev->getText();
 500                 } else {
 501                         $diffText = "<p>Can't load revision $row->rc_this_oldid</p>";
 502                         wfProfileOut( $fname );
 503                         return $comment . $diffText;
 504                 }
 505
 506                 if( $row->rc_last_oldid ) {
 507                         wfProfileIn( "$fname-dodiff" );
 508                         $oldrev =& Revision::newFromId( $row->rc_last_oldid );
 509                         if( !$oldrev ) {
 510                                 $diffText = "<p>Can't load old revision $row->rc_last_oldid</p>";
 511                                 wfProfileOut( $fname );
 512                                 return $comment . $diffText;
 513                         }
 514                         $oldtext = $oldrev->getText();
 515
 516                         # Old entries may contain illegal characters
 517                         # which will damage output
 518                         $oldtext = UtfNormal::cleanUp( $oldtext );
 519
 520                         global $wgFeedDiffCutoff;
 521                         if( strlen( $newtext ) > $wgFeedDiffCutoff ||
 522                                 strlen( $oldtext ) > $wgFeedDiffCutoff ) {
 523                                 $diffLink = $titleObj->escapeFullUrl(
 524                                         'diff=' . $row->rc_this_oldid .
 525                                         '&oldid=' . $row->rc_last_oldid );
 526                                 $diffText = '<a href="' .
 527                                         $diffLink .
 528                                         '">' .
 529                                         htmlspecialchars( wfMsgForContent( 'difference' ) ) .
 530                                         '</a>';
 531                         } else {
 532                                 $diffText = DifferenceEngine::getDiff( $oldtext, $newtext,
 533                                   wfMsg( 'revisionasof', $wgContLang->timeanddate( $row->rc_timestamp ) ),
 534                                   wfMsg( 'currentrev' ) );
 535                         }
 536                         wfProfileOut( "$fname-dodiff" );
 537                 } else {
 538                         $diffText = '<p><b>' . wfMsg( 'newpage' ) . '</b></p>' .
 539                                 '<div>' . nl2br( htmlspecialchars( $newtext ) ) . '</div>';
 540                 }
 541
 542                 wfProfileOut( $fname );
 543                 return $comment . $diffText;
 544         }
 545
 546         wfProfileOut( $fname );
 547         return $comment;
 548 }
 549
 550
 551 /**
 552  * Appends to second array if $value differs from that in $default
 553  */
 554 function appendToArrayIfNotDefault( $key, $value, $default, &$changed )
 555 {
 556         if ( is_null( $changed ) ) {
 557                 die();
 558         }
 559         if ( $default[$key] !== $value ) {
 560                 $changed[$key] = $value;
 561         }
 562 }
 563
 564 ?>