includes/SpecialRecentchanges.php

   1 <?php
   2 /**
   3  *
   4  * @addtogroup SpecialPage
   5  */
   6
   7 /**
   8  *
   9  */
  10 require_once( dirname(__FILE__) . '/ChangesList.php' );
  11
  12 /**
  13  * Constructor
  14  */
  15 function wfSpecialRecentchanges( $par, $specialPage ) {
  16         global $wgUser, $wgOut, $wgRequest, $wgUseRCPatrol;
  17         global $wgRCShowWatchingUsers, $wgShowUpdatedMarker;
  18         global $wgAllowCategorizedRecentChanges ;
  19         $fname = 'wfSpecialRecentchanges';
  20
  21         # Get query parameters
  22         $feedFormat = $wgRequest->getVal( 'feed' );
  23
  24         /* Checkbox values can't be true by default, because
  25          * we cannot differentiate between unset and not set at all
  26          */
  27         $defaults = array(
  28         /* int  */ 'days' => $wgUser->getDefaultOption('rcdays'),
  29         /* int  */ 'limit' => $wgUser->getDefaultOption('rclimit'),
  30         /* bool */ 'hideminor' => false,
  31         /* bool */ 'hidebots' => true,
  32         /* bool */ 'hideanons' => false,
  33         /* bool */ 'hideliu' => false,
  34         /* bool */ 'hidepatrolled' => false,
  35         /* bool */ 'hidemyself' => false,
  36         /* text */ 'from' => '',
  37         /* text */ 'namespace' => null,
  38         /* bool */ 'invert' => false,
  39         /* bool */ 'categories_any' => false,
  40         );
  41
  42         extract($defaults);
  43
  44
  45         $days = $wgUser->getOption( 'rcdays', $defaults['days']);
  46         $days = $wgRequest->getInt( 'days', $days );
  47
  48         $limit = $wgUser->getOption( 'rclimit', $defaults['limit'] );
  49
  50         #       list( $limit, $offset ) = wfCheckLimits( 100, 'rclimit' );
  51         $limit = $wgRequest->getInt( 'limit', $limit );
  52
  53         /* order of selection: url > preferences > default */
  54         $hideminor = $wgRequest->getBool( 'hideminor', $wgUser->getOption( 'hideminor') ? true : $defaults['hideminor'] );
  55
  56         # As a feed, use limited settings only
  57         if( $feedFormat ) {
  58                 global $wgFeedLimit;
  59                 if( $limit > $wgFeedLimit ) {
  60                         $limit = $wgFeedLimit;
  61                 }
  62
  63         } else {
  64
  65                 $namespace = $wgRequest->getIntOrNull( 'namespace' );
  66                 $invert = $wgRequest->getBool( 'invert', $defaults['invert'] );
  67                 $hidebots = $wgRequest->getBool( 'hidebots', $defaults['hidebots'] );
  68                 $hideanons = $wgRequest->getBool( 'hideanons', $defaults['hideanons'] );
  69                 $hideliu = $wgRequest->getBool( 'hideliu', $defaults['hideliu'] );
  70                 $hidepatrolled = $wgRequest->getBool( 'hidepatrolled', $defaults['hidepatrolled'] );
  71                 $hidemyself = $wgRequest->getBool ( 'hidemyself', $defaults['hidemyself'] );
  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                                 if ( 'hideanons' == $bit ) $hideanons = 1;
  85                                 if ( 'hidemyself' == $bit ) $hidemyself = 1;
  86
  87                                 if ( is_numeric( $bit ) ) {
  88                                         $limit = $bit;
  89                                 }
  90
  91                                 $m = array();
  92                                 if ( preg_match( '/^limit=(\d+)$/', $bit, $m ) ) {
  93                                         $limit = $m[1];
  94                                 }
  95
  96                                 if ( preg_match( '/^days=(\d+)$/', $bit, $m ) ) {
  97                                         $days = $m[1];
  98                                 }
  99                         }
 100                 }
 101         }
 102
 103         if ( $limit < 0 || $limit > 5000 ) $limit = $defaults['limit'];
 104
 105         # Database connection and caching
 106         $dbr = wfGetDB( DB_SLAVE );
 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         # It makes no sense to hide both anons and logged-in users
 131         # Where this occurs, force anons to be shown
 132         $forcebot = false;
 133         if( $hideanons && $hideliu ){
 134                 # Check if the user wants to show bots only
 135                 if( $hidebots ){
 136                         $hideanons = 0;
 137                 } else {
 138                         $forcebot = true;
 139                         $hidebots = 0;
 140                 }
 141         }
 142
 143         # Form WHERE fragments for all the options
 144         $hidem  = $hideminor ? 'AND rc_minor = 0' : '';
 145         $hidem .= $hidebots ? ' AND rc_bot = 0' : '';
 146         $hidem .= $hideliu && !$forcebot ? ' AND rc_user = 0' : '';
 147         $hidem .= ($wgUser->useRCPatrol() && $hidepatrolled ) ? ' AND rc_patrolled = 0' : '';
 148         $hidem .= $hideanons && !$forcebot ? ' AND rc_user != 0' : '';
 149         $hidem .= $forcebot ? ' AND rc_bot = 1' : '';
 150
 151         if( $hidemyself ) {
 152                 if( $wgUser->getID() ) {
 153                         $hidem .= ' AND rc_user != ' . $wgUser->getID();
 154                 } else {
 155                         $hidem .= ' AND rc_user_text != ' . $dbr->addQuotes( $wgUser->getName() );
 156                 }
 157         }
 158
 159         // JOIN on watchlist for users
 160         $uid = $wgUser->getID();
 161         if( $uid ) {
 162                 $tables = array( 'recentchanges', 'watchlist' );
 163                 $join_conds = array( 'watchlist' => array('LEFT JOIN',"wl_user={$uid} AND wl_title=rc_title AND wl_namespace=rc_namespace") );
 164         } else {
 165                 $tables = array( 'recentchanges' );
 166                 $join_conds = array();
 167         }
 168
 169         # Namespace filtering
 170         $hidem .= is_null($namespace) ?  '' : ' AND rc_namespace' . ($invert ? '!=' : '=') . $namespace;
 171
 172         // Is there either one namespace selected or excluded?
 173         // Also, if this is "all" or main namespace, just use timestamp index.
 174         if( is_null($namespace) || $invert || $namespace == NS_MAIN ) {
 175                 $res = $dbr->select( $tables, '*',
 176                         array( "rc_timestamp >= '{$cutoff}' {$hidem}" ),
 177                         __METHOD__,
 178                         array( 'ORDER BY' => 'rc_timestamp DESC', 'LIMIT' => $limit,
 179                                 'USE INDEX' => array('recentchanges' => 'rc_timestamp') ),
 180                         $join_conds );
 181         // We have a new_namespace_time index! UNION over new=(0,1) and sort result set!
 182         } else {
 183                 // New pages
 184                 $sqlNew = $dbr->selectSQLText( $tables, '*',
 185                         array( 'rc_new' => 1,
 186                                 "rc_timestamp >= '{$cutoff}' {$hidem}" ),
 187                         __METHOD__,
 188                         array( 'ORDER BY' => 'rc_timestamp DESC', 'LIMIT' => $limit,
 189                                 'USE INDEX' =>  array('recentchanges' => 'new_name_timestamp') ),
 190                         $join_conds );
 191                 // Old pages
 192                 $sqlOld = $dbr->selectSQLText( $tables, '*',
 193                         array( 'rc_new' => 0,
 194                                 "rc_timestamp >= '{$cutoff}' {$hidem}" ),
 195                         __METHOD__,
 196                         array( 'ORDER BY' => 'rc_timestamp DESC', 'LIMIT' => $limit,
 197                                 'USE INDEX' =>  array('recentchanges' => 'new_name_timestamp') ),
 198                         $join_conds );
 199                 # Join the two fast queries, and sort the result set
 200                 $sql = "($sqlNew) UNION ($sqlOld) ORDER BY rc_timestamp DESC LIMIT $limit";
 201                 $res = $dbr->query( $sql, __METHOD__ );
 202         }
 203
 204         // Fetch results, prepare a batch link existence check query
 205         $rows = array();
 206         $batch = new LinkBatch;
 207         while( $row = $dbr->fetchObject( $res ) ){
 208                 $rows[] = $row;
 209                 if ( !$feedFormat ) {
 210                         // User page and talk links
 211                         $batch->add( NS_USER, $row->rc_user_text  );
 212                         $batch->add( NS_USER_TALK, $row->rc_user_text  );
 213                 }
 214
 215         }
 216         $dbr->freeResult( $res );
 217
 218         if( $feedFormat ) {
 219                 rcOutputFeed( $rows, $feedFormat, $limit, $hideminor, $lastmod );
 220         } else {
 221
 222                 # Web output...
 223
 224                 // Run existence checks
 225                 $batch->execute();
 226                 $any = $wgRequest->getBool( 'categories_any', $defaults['categories_any']);
 227
 228                 // Output header
 229                 if ( !$specialPage->including() ) {
 230                         $wgOut->addWikiText( wfMsgForContentNoTrans( "recentchangestext" ) );
 231
 232                         // Dump everything here
 233                         $nondefaults = array();
 234
 235                         wfAppendToArrayIfNotDefault( 'days', $days, $defaults, $nondefaults);
 236                         wfAppendToArrayIfNotDefault( 'limit', $limit , $defaults, $nondefaults);
 237                         wfAppendToArrayIfNotDefault( 'hideminor', $hideminor, $defaults, $nondefaults);
 238                         wfAppendToArrayIfNotDefault( 'hidebots', $hidebots, $defaults, $nondefaults);
 239                         wfAppendToArrayIfNotDefault( 'hideanons', $hideanons, $defaults, $nondefaults );
 240                         wfAppendToArrayIfNotDefault( 'hideliu', $hideliu, $defaults, $nondefaults);
 241                         wfAppendToArrayIfNotDefault( 'hidepatrolled', $hidepatrolled, $defaults, $nondefaults);
 242                         wfAppendToArrayIfNotDefault( 'hidemyself', $hidemyself, $defaults, $nondefaults);
 243                         wfAppendToArrayIfNotDefault( 'from', $from, $defaults, $nondefaults);
 244                         wfAppendToArrayIfNotDefault( 'namespace', $namespace, $defaults, $nondefaults);
 245                         wfAppendToArrayIfNotDefault( 'invert', $invert, $defaults, $nondefaults);
 246                         wfAppendToArrayIfNotDefault( 'categories_any', $any, $defaults, $nondefaults);
 247
 248                         // Add end of the texts
 249                         $wgOut->addHTML( '<div class="rcoptions">' . rcOptionsPanel( $defaults, $nondefaults ) . "\n" );
 250                         $wgOut->addHTML( rcNamespaceForm( $namespace, $invert, $nondefaults, $any ) . '</div>'."\n");
 251                 }
 252
 253                 // And now for the content
 254                 $wgOut->setSyndicated( true );
 255
 256                 $list = ChangesList::newFromUser( $wgUser );
 257
 258                 if ( $wgAllowCategorizedRecentChanges ) {
 259                         $categories = trim ( $wgRequest->getVal ( 'categories' , "" ) ) ;
 260                         $categories = str_replace ( "|" , "\n" , $categories ) ;
 261                         $categories = explode ( "\n" , $categories ) ;
 262                         rcFilterByCategories ( $rows , $categories , $any ) ;
 263                 }
 264
 265                 $s = $list->beginRecentChangesList();
 266                 $counter = 1;
 267
 268                 $showWatcherCount = $wgRCShowWatchingUsers && $wgUser->getOption( 'shownumberswatching' );
 269                 $watcherCache = array();
 270
 271                 foreach( $rows as $obj ){
 272                         if( $limit == 0) {
 273                                 break;
 274                         }
 275
 276                         if ( ! ( $hideminor     && $obj->rc_minor     ) &&
 277                              ! ( $hidepatrolled && $obj->rc_patrolled ) ) {
 278                                 $rc = RecentChange::newFromRow( $obj );
 279                                 $rc->counter = $counter++;
 280
 281                                 if ($wgShowUpdatedMarker
 282                                         && !empty( $obj->wl_notificationtimestamp )
 283                                         && ($obj->rc_timestamp >= $obj->wl_notificationtimestamp)) {
 284                                                 $rc->notificationtimestamp = true;
 285                                 } else {
 286                                         $rc->notificationtimestamp = false;
 287                                 }
 288
 289                                 $rc->numberofWatchingusers = 0; // Default
 290                                 if ($showWatcherCount && $obj->rc_namespace >= 0) {
 291                                         if (!isset($watcherCache[$obj->rc_namespace][$obj->rc_title])) {
 292                                                 $watcherCache[$obj->rc_namespace][$obj->rc_title] =
 293                                                         $dbr->selectField( 'watchlist',
 294                                                                 'COUNT(*)',
 295                                                                 array(
 296                                                                         'wl_namespace' => $obj->rc_namespace,
 297                                                                         'wl_title' => $obj->rc_title,
 298                                                                 ),
 299                                                                 __METHOD__ . '-watchers' );
 300                                         }
 301                                         $rc->numberofWatchingusers = $watcherCache[$obj->rc_namespace][$obj->rc_title];
 302                                 }
 303                                 $s .= $list->recentChangesLine( $rc, !empty( $obj->wl_user ) );
 304                                 --$limit;
 305                         }
 306                 }
 307                 $s .= $list->endRecentChangesList();
 308                 $wgOut->addHTML( $s );
 309         }
 310 }
 311
 312 function rcFilterByCategories ( &$rows , $categories , $any ) {
 313         if( empty( $categories ) ) {
 314                 return;
 315         }
 316
 317         # Filter categories
 318         $cats = array () ;
 319         foreach ( $categories AS $cat ) {
 320                 $cat = trim ( $cat ) ;
 321                 if ( $cat == "" ) continue ;
 322                 $cats[] = $cat ;
 323         }
 324
 325         # Filter articles
 326         $articles = array () ;
 327         $a2r = array () ;
 328         foreach ( $rows AS $k => $r ) {
 329                 $nt = Title::makeTitle( $r->rc_namespace, $r->rc_title );
 330                 $id = $nt->getArticleID() ;
 331                 if ( $id == 0 ) continue ; # Page might have been deleted...
 332                 if ( !in_array ( $id , $articles ) ) {
 333                         $articles[] = $id ;
 334                 }
 335                 if ( !isset ( $a2r[$id] ) ) {
 336                         $a2r[$id] = array() ;
 337                 }
 338                 $a2r[$id][] = $k ;
 339         }
 340
 341         # Shortcut?
 342         if ( count ( $articles ) == 0 OR count ( $cats ) == 0 )
 343                 return ;
 344
 345         # Look up
 346         $c = new Categoryfinder ;
 347         $c->seed ( $articles , $cats , $any ? "OR" : "AND" ) ;
 348         $match = $c->run () ;
 349
 350         # Filter
 351         $newrows = array () ;
 352         foreach ( $match AS $id ) {
 353                 foreach ( $a2r[$id] AS $rev ) {
 354                         $k = $rev ;
 355                         $newrows[$k] = $rows[$k] ;
 356                 }
 357         }
 358         $rows = $newrows ;
 359 }
 360
 361 function rcOutputFeed( $rows, $feedFormat, $limit, $hideminor, $lastmod ) {
 362         global $messageMemc, $wgFeedCacheTimeout;
 363         global $wgFeedClasses, $wgTitle, $wgSitename, $wgContLanguageCode;
 364         global $wgFeed;
 365
 366         if ( !$wgFeed ) {
 367                 global $wgOut;
 368                 $wgOut->addWikiMsg( 'feed-unavailable' );
 369                 return;
 370         }
 371
 372         if( !isset( $wgFeedClasses[$feedFormat] ) ) {
 373                 wfHttpError( 500, "Internal Server Error", "Unsupported feed type." );
 374                 return false;
 375         }
 376
 377         $timekey = wfMemcKey( 'rcfeed', $feedFormat, 'timestamp' );
 378         $key = wfMemcKey( 'rcfeed', $feedFormat, 'limit', $limit, 'minor', $hideminor );
 379
 380         $feedTitle = $wgSitename . ' - ' . wfMsgForContent( 'recentchanges' ) .
 381                 ' [' . $wgContLanguageCode . ']';
 382         $feed = new $wgFeedClasses[$feedFormat](
 383                 $feedTitle,
 384                 htmlspecialchars( wfMsgForContent( 'recentchanges-feed-description' ) ),
 385                 $wgTitle->getFullUrl() );
 386
 387         //purge cache if requested
 388         global $wgRequest, $wgUser;
 389         $purge = $wgRequest->getVal( 'action' ) == 'purge';
 390         if ( $purge && $wgUser->isAllowed('purge') ) {
 391                 $messageMemc->delete( $timekey );
 392                 $messageMemc->delete( $key );
 393         }
 394
 395         /**
 396          * Bumping around loading up diffs can be pretty slow, so where
 397          * possible we want to cache the feed output so the next visitor
 398          * gets it quick too.
 399          */
 400         $cachedFeed = false;
 401         if( ( $wgFeedCacheTimeout > 0 ) && ( $feedLastmod = $messageMemc->get( $timekey ) ) ) {
 402                 /**
 403                  * If the cached feed was rendered very recently, we may
 404                  * go ahead and use it even if there have been edits made
 405                  * since it was rendered. This keeps a swarm of requests
 406                  * from being too bad on a super-frequently edited wiki.
 407                  */
 408                 if( time() - wfTimestamp( TS_UNIX, $feedLastmod )
 409                                 < $wgFeedCacheTimeout
 410                         || wfTimestamp( TS_UNIX, $feedLastmod )
 411                                 > wfTimestamp( TS_UNIX, $lastmod ) ) {
 412                         wfDebug( "RC: loading feed from cache ($key; $feedLastmod; $lastmod)...\n" );
 413                         $cachedFeed = $messageMemc->get( $key );
 414                 } else {
 415                         wfDebug( "RC: cached feed timestamp check failed ($feedLastmod; $lastmod)\n" );
 416                 }
 417         }
 418         if( is_string( $cachedFeed ) ) {
 419                 wfDebug( "RC: Outputting cached feed\n" );
 420                 $feed->httpHeaders();
 421                 echo $cachedFeed;
 422         } else {
 423                 wfDebug( "RC: rendering new feed and caching it\n" );
 424                 ob_start();
 425                 rcDoOutputFeed( $rows, $feed );
 426                 $cachedFeed = ob_get_contents();
 427                 ob_end_flush();
 428
 429                 $expire = 3600 * 24; # One day
 430                 $messageMemc->set( $key, $cachedFeed );
 431                 $messageMemc->set( $timekey, wfTimestamp( TS_MW ), $expire );
 432         }
 433         return true;
 434 }
 435
 436 /**
 437  * @todo document
 438  * @param $rows Database resource with recentchanges rows
 439  */
 440 function rcDoOutputFeed( $rows, &$feed ) {
 441         wfProfileIn( __METHOD__ );
 442
 443         $feed->outHeader();
 444
 445         # Merge adjacent edits by one user
 446         $sorted = array();
 447         $n = 0;
 448         foreach( $rows as $obj ) {
 449                 if( $n > 0 &&
 450                         $obj->rc_namespace >= 0 &&
 451                         $obj->rc_cur_id == $sorted[$n-1]->rc_cur_id &&
 452                         $obj->rc_user_text == $sorted[$n-1]->rc_user_text ) {
 453                         $sorted[$n-1]->rc_last_oldid = $obj->rc_last_oldid;
 454                 } else {
 455                         $sorted[$n] = $obj;
 456                         $n++;
 457                 }
 458         }
 459
 460         foreach( $sorted as $obj ) {
 461                 $title = Title::makeTitle( $obj->rc_namespace, $obj->rc_title );
 462                 $talkpage = $title->getTalkPage();
 463                 $item = new FeedItem(
 464                         $title->getPrefixedText(),
 465                         rcFormatDiff( $obj ),
 466                         $title->getFullURL( 'diff=' . $obj->rc_this_oldid . '&oldid=prev' ),
 467                         $obj->rc_timestamp,
 468                         ($obj->rc_deleted & Revision::DELETED_USER) ? wfMsgHtml('rev-deleted-user') : $obj->rc_user_text,
 469                         $talkpage->getFullURL()
 470                         );
 471                 $feed->outItem( $item );
 472         }
 473         $feed->outFooter();
 474         wfProfileOut( __METHOD__ );
 475 }
 476
 477 /**
 478  *
 479  */
 480 function rcCountLink( $lim, $d, $page='Recentchanges', $more='' ) {
 481         global $wgUser, $wgLang, $wgContLang;
 482         $sk = $wgUser->getSkin();
 483         $s = $sk->makeKnownLink( $wgContLang->specialPage( $page ),
 484           ($lim ? $wgLang->formatNum( "{$lim}" ) : wfMsg( 'recentchangesall' ) ), "{$more}" .
 485           ($d ? "days={$d}&" : '') . 'limit='.$lim );
 486         return $s;
 487 }
 488
 489 /**
 490  *
 491  */
 492 function rcDaysLink( $lim, $d, $page='Recentchanges', $more='' ) {
 493         global $wgUser, $wgLang, $wgContLang;
 494         $sk = $wgUser->getSkin();
 495         $s = $sk->makeKnownLink( $wgContLang->specialPage( $page ),
 496           ($d ? $wgLang->formatNum( "{$d}" ) : wfMsg( 'recentchangesall' ) ), $more.'days='.$d .
 497           ($lim ? '&limit='.$lim : '') );
 498         return $s;
 499 }
 500
 501 /**
 502  * Used by Recentchangeslinked
 503  */
 504 function rcDayLimitLinks( $days, $limit, $page='Recentchanges', $more='', $doall = false, $minorLink = '',
 505         $botLink = '', $liuLink = '', $patrLink = '', $myselfLink = '' ) {
 506         if ($more != '') $more .= '&';
 507         $cl = rcCountLink( 50, $days, $page, $more ) . ' | ' .
 508           rcCountLink( 100, $days, $page, $more  ) . ' | ' .
 509           rcCountLink( 250, $days, $page, $more  ) . ' | ' .
 510           rcCountLink( 500, $days, $page, $more  ) .
 511           ( $doall ? ( ' | ' . rcCountLink( 0, $days, $page, $more ) ) : '' );
 512         $dl = rcDaysLink( $limit, 1, $page, $more  ) . ' | ' .
 513           rcDaysLink( $limit, 3, $page, $more  ) . ' | ' .
 514           rcDaysLink( $limit, 7, $page, $more  ) . ' | ' .
 515           rcDaysLink( $limit, 14, $page, $more  ) . ' | ' .
 516           rcDaysLink( $limit, 30, $page, $more  ) .
 517           ( $doall ? ( ' | ' . rcDaysLink( $limit, 0, $page, $more ) ) : '' );
 518
 519         $linkParts = array( 'minorLink' => 'minor', 'botLink' => 'bots', 'liuLink' => 'liu', 'patrLink' => 'patr', 'myselfLink' => 'mine' );
 520         foreach( $linkParts as $linkVar => $linkMsg ) {
 521                 if( $$linkVar != '' )
 522                         $links[] = wfMsgHtml( 'rcshowhide' . $linkMsg, $$linkVar );
 523         }
 524
 525         $shm = implode( ' | ', $links );
 526         $note = wfMsg( 'rclinks', $cl, $dl, $shm );
 527         return $note;
 528 }
 529
 530
 531 /**
 532  * Makes change an option link which carries all the other options
 533  * @param $title see Title
 534  * @param $override
 535  * @param $options
 536  */
 537 function makeOptionsLink( $title, $override, $options ) {
 538         global $wgUser, $wgContLang;
 539         $sk = $wgUser->getSkin();
 540         return $sk->makeKnownLink( $wgContLang->specialPage( 'Recentchanges' ),
 541                 htmlspecialchars( $title ), wfArrayToCGI( $override, $options ) );
 542 }
 543
 544 /**
 545  * Creates the options panel.
 546  * @param $defaults
 547  * @param $nondefaults
 548  */
 549 function rcOptionsPanel( $defaults, $nondefaults ) {
 550         global $wgLang, $wgUser;
 551
 552         $options = $nondefaults + $defaults;
 553
 554         if( $options['from'] )
 555                 $note = wfMsgExt( 'rcnotefrom', array( 'parseinline' ),
 556                         $wgLang->formatNum( $options['limit'] ),
 557                         $wgLang->timeanddate( $options['from'], true ) );
 558         else
 559                 $note = wfMsgExt( 'rcnote', array( 'parseinline' ),
 560                         $wgLang->formatNum( $options['limit'] ),
 561                         $wgLang->formatNum( $options['days'] ),
 562                         $wgLang->timeAndDate( wfTimestampNow(), true ) );
 563
 564         // limit links
 565         $options_limit = array(50, 100, 250, 500);
 566         foreach( $options_limit as $value ) {
 567                 $cl[] = makeOptionsLink( $wgLang->formatNum( $value ),
 568                         array( 'limit' => $value ), $nondefaults) ;
 569         }
 570         $cl = implode( ' | ', $cl);
 571
 572         // day links, reset 'from' to none
 573         $options_days = array(1, 3, 7, 14, 30);
 574         foreach( $options_days as $value ) {
 575                 $dl[] = makeOptionsLink( $wgLang->formatNum( $value ),
 576                         array( 'days' => $value, 'from' => ''  ), $nondefaults) ;
 577         }
 578         $dl = implode( ' | ', $dl);
 579
 580
 581         // show/hide links
 582         $showhide = array( wfMsg( 'show' ), wfMsg( 'hide' ));
 583         $minorLink = makeOptionsLink( $showhide[1-$options['hideminor']],
 584                 array( 'hideminor' => 1-$options['hideminor'] ), $nondefaults);
 585         $botLink = makeOptionsLink( $showhide[1-$options['hidebots']],
 586                 array( 'hidebots' => 1-$options['hidebots'] ), $nondefaults);
 587         $anonsLink = makeOptionsLink( $showhide[ 1 - $options['hideanons'] ],
 588                 array( 'hideanons' => 1 - $options['hideanons'] ), $nondefaults );
 589         $liuLink   = makeOptionsLink( $showhide[1-$options['hideliu']],
 590                 array( 'hideliu' => 1-$options['hideliu'] ), $nondefaults);
 591         $patrLink  = makeOptionsLink( $showhide[1-$options['hidepatrolled']],
 592                 array( 'hidepatrolled' => 1-$options['hidepatrolled'] ), $nondefaults);
 593         $myselfLink = makeOptionsLink( $showhide[1-$options['hidemyself']],
 594                 array( 'hidemyself' => 1-$options['hidemyself'] ), $nondefaults);
 595
 596         $links[] = wfMsgHtml( 'rcshowhideminor', $minorLink );
 597         $links[] = wfMsgHtml( 'rcshowhidebots', $botLink );
 598         $links[] = wfMsgHtml( 'rcshowhideanons', $anonsLink );
 599         $links[] = wfMsgHtml( 'rcshowhideliu', $liuLink );
 600         if( $wgUser->useRCPatrol() )
 601                 $links[] = wfMsgHtml( 'rcshowhidepatr', $patrLink );
 602         $links[] = wfMsgHtml( 'rcshowhidemine', $myselfLink );
 603         $hl = implode( ' | ', $links );
 604
 605         // show from this onward link
 606         $now = $wgLang->timeanddate( wfTimestampNow(), true );
 607         $tl =  makeOptionsLink( $now, array( 'from' => wfTimestampNow()), $nondefaults );
 608
 609         $rclinks = wfMsgExt( 'rclinks', array( 'parseinline', 'replaceafter'),
 610                 $cl, $dl, $hl );
 611         $rclistfrom = wfMsgExt( 'rclistfrom', array( 'parseinline', 'replaceafter'), $tl );
 612         return "$note<br />$rclinks<br />$rclistfrom";
 613
 614 }
 615
 616 /**
 617  * Creates the choose namespace selection
 618  *
 619  * @private
 620  *
 621  * @param $namespace Mixed: the key of the currently selected namespace, empty string
 622  *              if there is none
 623  * @param $invert Bool: whether to invert the namespace selection
 624  * @param $nondefaults Array: an array of non default options to be remembered
 625  * @param $categories_any Bool: Default value for the checkbox
 626  *
 627  * @return string
 628  */
 629 function rcNamespaceForm( $namespace, $invert, $nondefaults, $categories_any ) {
 630         global $wgScript, $wgAllowCategorizedRecentChanges, $wgRequest;
 631         $t = SpecialPage::getTitleFor( 'Recentchanges' );
 632
 633         $namespaceselect = HTMLnamespaceselector($namespace, '');
 634         $submitbutton = '<input type="submit" value="' . wfMsgHtml( 'allpagessubmit' ) . "\" />\n";
 635         $invertbox = "<input type='checkbox' name='invert' value='1' id='nsinvert'" . ( $invert ? ' checked="checked"' : '' ) . ' />';
 636
 637         if ( $wgAllowCategorizedRecentChanges ) {
 638                 $categories = trim ( $wgRequest->getVal ( 'categories' , "" ) ) ;
 639                 $cb_arr = array( 'type' => 'checkbox', 'name' => 'categories_any', 'value' => "1" ) ;
 640                 if ( $categories_any ) $cb_arr['checked'] = "checked" ;
 641                 $catbox = "<br />" ;
 642                 $catbox .= wfMsgExt('rc_categories', array('parseinline')) . " ";
 643                 $catbox .= wfElement('input', array( 'type' => 'text', 'name' => 'categories', 'value' => $categories));
 644                 $catbox .= " &nbsp;" ;
 645                 $catbox .= wfElement('input', $cb_arr );
 646                 $catbox .= wfMsgExt('rc_categories_any', array('parseinline'));
 647         } else {
 648                 $catbox = "" ;
 649         }
 650
 651         $out = "<div class='namespacesettings'><form method='get' action='{$wgScript}'>\n";
 652
 653         foreach ( $nondefaults as $key => $value ) {
 654                 if ($key != 'namespace' && $key != 'invert')
 655                         $out .= wfElement('input', array( 'type' => 'hidden', 'name' => $key, 'value' => $value));
 656         }
 657
 658         $out .= '<input type="hidden" name="title" value="'.$t->getPrefixedText().'" />';
 659         $out .= "
 660 <div id='nsselect' class='recentchanges'>
 661         <label for='namespace'>" . wfMsgHtml('namespace') . "</label>
 662         {$namespaceselect}{$submitbutton}{$invertbox} <label for='nsinvert'>" . wfMsgHtml('invert') . "</label>{$catbox}\n</div>";
 663         $out .= '</form></div>';
 664         return $out;
 665 }
 666
 667
 668 /**
 669  * Format a diff for the newsfeed
 670  */
 671 function rcFormatDiff( $row ) {
 672         global $wgUser;
 673
 674         $titleObj = Title::makeTitle( $row->rc_namespace, $row->rc_title );
 675         $timestamp = wfTimestamp( TS_MW, $row->rc_timestamp );
 676         $actiontext = '';
 677         if( $row->rc_type == RC_LOG ) {
 678                 if( $row->rc_deleted & LogPage::DELETED_ACTION ) {
 679                         $actiontext = wfMsgHtml('rev-deleted-event');
 680                 } else {
 681                         $actiontext = LogPage::actionText( $row->rc_log_type, $row->rc_log_action,
 682                                 $titleObj, $wgUser->getSkin(), LogPage::extractParams($row->rc_params,true,true) );
 683                 }
 684         }
 685         return rcFormatDiffRow( $titleObj,
 686                 $row->rc_last_oldid, $row->rc_this_oldid,
 687                 $timestamp,
 688                 ($row->rc_deleted & Revision::DELETED_COMMENT) ? wfMsgHtml('rev-deleted-comment') : $row->rc_comment,
 689                 $actiontext );
 690 }
 691
 692 function rcFormatDiffRow( $title, $oldid, $newid, $timestamp, $comment, $actiontext='' ) {
 693         global $wgFeedDiffCutoff, $wgContLang, $wgUser;
 694         $fname = 'rcFormatDiff';
 695         wfProfileIn( $fname );
 696
 697         $skin = $wgUser->getSkin();
 698         # log enties
 699         if( $actiontext ) {
 700                 $comment = "$actiontext $comment";
 701         }
 702         $completeText = '<p>' . $skin->formatComment( $comment ) . "</p>\n";
 703
 704         //NOTE: Check permissions for anonymous users, not current user.
 705         //      No "privileged" version should end up in the cache.
 706         //      Most feed readers will not log in anway.
 707         $anon = new User();
 708         $accErrors = $title->getUserPermissionsErrors( 'read', $anon, true );
 709
 710         if( $title->getNamespace() >= 0 && !$accErrors ) {
 711                 if( $oldid ) {
 712                         wfProfileIn( "$fname-dodiff" );
 713
 714                         $de = new DifferenceEngine( $title, $oldid, $newid );
 715                         #$diffText = $de->getDiff( wfMsg( 'revisionasof',
 716                         #       $wgContLang->timeanddate( $timestamp ) ),
 717                         #       wfMsg( 'currentrev' ) );
 718                         $diffText = $de->getDiff(
 719                                 wfMsg( 'previousrevision' ), // hack
 720                                 wfMsg( 'revisionasof',
 721                                         $wgContLang->timeanddate( $timestamp ) ) );
 722
 723
 724                         if ( strlen( $diffText ) > $wgFeedDiffCutoff ) {
 725                                 // Omit large diffs
 726                                 $diffLink = $title->escapeFullUrl(
 727                                         'diff=' . $newid .
 728                                         '&oldid=' . $oldid );
 729                                 $diffText = '<a href="' .
 730                                         $diffLink .
 731                                         '">' .
 732                                         htmlspecialchars( wfMsgForContent( 'difference' ) ) .
 733                                         '</a>';
 734                         } elseif ( $diffText === false ) {
 735                                 // Error in diff engine, probably a missing revision
 736                                 $diffText = "<p>Can't load revision $newid</p>";
 737                         } else {
 738                                 // Diff output fine, clean up any illegal UTF-8
 739                                 $diffText = UtfNormal::cleanUp( $diffText );
 740                                 $diffText = rcApplyDiffStyle( $diffText );
 741                         }
 742                         wfProfileOut( "$fname-dodiff" );
 743                 } else {
 744                         $rev = Revision::newFromId( $newid );
 745                         if( is_null( $rev ) ) {
 746                                 $newtext = '';
 747                         } else {
 748                                 $newtext = $rev->getText();
 749                         }
 750                         $diffText = '<p><b>' . wfMsg( 'newpage' ) . '</b></p>' .
 751                                 '<div>' . nl2br( htmlspecialchars( $newtext ) ) . '</div>';
 752                 }
 753                 $completeText .= $diffText;
 754         }
 755
 756         wfProfileOut( $fname );
 757         return $completeText;
 758 }
 759
 760 /**
 761  * Hacky application of diff styles for the feeds.
 762  * Might be 'cleaner' to use DOM or XSLT or something,
 763  * but *gack* it's a pain in the ass.
 764  *
 765  * @param $text String:
 766  * @return string
 767  * @private
 768  */
 769 function rcApplyDiffStyle( $text ) {
 770         $styles = array(
 771                 'diff'             => 'background-color: white; color:black;',
 772                 'diff-otitle'      => 'background-color: white; color:black;',
 773                 'diff-ntitle'      => 'background-color: white; color:black;',
 774                 'diff-addedline'   => 'background: #cfc; color:black; font-size: smaller;',
 775                 'diff-deletedline' => 'background: #ffa; color:black; font-size: smaller;',
 776                 'diff-context'     => 'background: #eee; color:black; font-size: smaller;',
 777                 'diffchange'       => 'color: red; font-weight: bold; text-decoration: none;',
 778         );
 779
 780         foreach( $styles as $class => $style ) {
 781                 $text = preg_replace( "/(<[^>]+)class=(['\"])$class\\2([^>]*>)/",
 782                         "\\1style=\"$style\"\\3", $text );
 783         }
 784
 785         return $text;
 786 }