includes/specials/SpecialRecentchanges.php

   1 <?php
   2 /**
   3  * Implements Special:Recentchanges
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 2 of the License, or
   8  * (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License along
  16  * with this program; if not, write to the Free Software Foundation, Inc.,
  17  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  18  * http://www.gnu.org/copyleft/gpl.html
  19  *
  20  * @file
  21  * @ingroup SpecialPage
  22  */
  23
  24 /**
  25  * A special page that lists last changes made to the wiki
  26  *
  27  * @ingroup SpecialPage
  28  */
  29 class SpecialRecentChanges extends IncludableSpecialPage {
  30         var $rcOptions, $rcSubpage;
  31
  32         public function __construct( $name = 'Recentchanges' ) {
  33                 parent::__construct( $name );
  34         }
  35
  36         /**
  37          * Get a FormOptions object containing the default options
  38          *
  39          * @return FormOptions
  40          */
  41         public function getDefaultOptions() {
  42                 global $wgUser;
  43                 $opts = new FormOptions();
  44
  45                 $opts->add( 'days',  (int)$wgUser->getOption( 'rcdays' ) );
  46                 $opts->add( 'limit', (int)$wgUser->getOption( 'rclimit' ) );
  47                 $opts->add( 'from', '' );
  48
  49                 $opts->add( 'hideminor',     $wgUser->getBoolOption( 'hideminor' ) );
  50                 $opts->add( 'hidebots',      true  );
  51                 $opts->add( 'hideanons',     false );
  52                 $opts->add( 'hideliu',       false );
  53                 $opts->add( 'hidepatrolled', $wgUser->getBoolOption( 'hidepatrolled' ) );
  54                 $opts->add( 'hidemyself',    false );
  55
  56                 $opts->add( 'namespace', '', FormOptions::INTNULL );
  57                 $opts->add( 'invert', false );
  58                 $opts->add( 'associated', false );
  59
  60                 $opts->add( 'categories', '' );
  61                 $opts->add( 'categories_any', false );
  62                 $opts->add( 'tagfilter', '' );
  63                 return $opts;
  64         }
  65
  66         /**
  67          * Create a FormOptions object with options as specified by the user
  68          *
  69          * @return FormOptions
  70          */
  71         public function setup( $parameters ) {
  72                 global $wgRequest;
  73
  74                 $opts = $this->getDefaultOptions();
  75                 $opts->fetchValuesFromRequest( $wgRequest );
  76
  77                 // Give precedence to subpage syntax
  78                 if( $parameters !== null ) {
  79                         $this->parseParameters( $parameters, $opts );
  80                 }
  81
  82                 $opts->validateIntBounds( 'limit', 0, 5000 );
  83                 return $opts;
  84         }
  85
  86         /**
  87          * Create a FormOptions object specific for feed requests and return it
  88          *
  89          * @return FormOptions
  90          */
  91         public function feedSetup() {
  92                 global $wgFeedLimit, $wgRequest;
  93                 $opts = $this->getDefaultOptions();
  94                 # Feed is cached on limit,hideminor,namespace; other params would randomly not work
  95                 $opts->fetchValuesFromRequest( $wgRequest, array( 'limit', 'hideminor', 'namespace' ) );
  96                 $opts->validateIntBounds( 'limit', 0, $wgFeedLimit );
  97                 return $opts;
  98         }
  99
 100         /**
 101          * Get the current FormOptions for this request
 102          */
 103         public function getOptions() {
 104                 if ( $this->rcOptions === null ) {
 105                         global $wgRequest;
 106                         $feedFormat = $wgRequest->getVal( 'feed' );
 107                         $this->rcOptions = $feedFormat ? $this->feedSetup() : $this->setup( $this->rcSubpage );
 108                 }
 109                 return $this->rcOptions;
 110         }
 111
 112
 113         /**
 114          * Main execution point
 115          *
 116          * @param $subpage String
 117          */
 118         public function execute( $subpage ) {
 119                 global $wgRequest, $wgOut;
 120                 $this->rcSubpage = $subpage;
 121                 $feedFormat = $wgRequest->getVal( 'feed' );
 122
 123                 # 10 seconds server-side caching max
 124                 $wgOut->setSquidMaxage( 10 );
 125                 # Check if the client has a cached version
 126                 $lastmod = $this->checkLastModified( $feedFormat );
 127                 if( $lastmod === false ) {
 128                         return;
 129                 }
 130
 131                 $opts = $this->getOptions();
 132                 $this->setHeaders();
 133                 $this->outputHeader();
 134
 135                 // Fetch results, prepare a batch link existence check query
 136                 $conds = $this->buildMainQueryConds( $opts );
 137                 $rows = $this->doMainQuery( $conds, $opts );
 138                 if( $rows === false ){
 139                         if( !$this->including() ) {
 140                                 $this->doHeader( $opts );
 141                         }
 142                         return;
 143                 }
 144
 145                 if( !$feedFormat ) {
 146                         $batch = new LinkBatch;
 147                         foreach( $rows as $row ) {
 148                                 $batch->add( NS_USER, $row->rc_user_text  );
 149                                 $batch->add( NS_USER_TALK, $row->rc_user_text  );
 150                                 $batch->add( $row->rc_namespace, $row->rc_title );
 151                         }
 152                         $batch->execute();
 153                 }
 154                 if( $feedFormat ) {
 155                         list( $changesFeed, $formatter ) = $this->getFeedObject( $feedFormat );
 156                         $changesFeed->execute( $formatter, $rows, $lastmod, $opts );
 157                 } else {
 158                         $this->webOutput( $rows, $opts );
 159                 }
 160
 161                 $rows->free();
 162         }
 163
 164         /**
 165          * Return an array with a ChangesFeed object and ChannelFeed object
 166          *
 167          * @return Array
 168          */
 169         public function getFeedObject( $feedFormat ){
 170                 $changesFeed = new ChangesFeed( $feedFormat, 'rcfeed' );
 171                 $formatter = $changesFeed->getFeedObject(
 172                         wfMsgForContent( 'recentchanges' ),
 173                         wfMsgForContent( 'recentchanges-feed-description' ),
 174                         $this->getTitle()->getFullUrl()
 175                 );
 176                 return array( $changesFeed, $formatter );
 177         }
 178
 179         /**
 180          * Process $par and put options found if $opts
 181          * Mainly used when including the page
 182          *
 183          * @param $par String
 184          * @param $opts FormOptions
 185          */
 186         public function parseParameters( $par, FormOptions $opts ) {
 187                 $bits = preg_split( '/\s*,\s*/', trim( $par ) );
 188                 foreach( $bits as $bit ) {
 189                         if( 'hidebots' === $bit ) $opts['hidebots'] = true;
 190                         if( 'bots' === $bit ) $opts['hidebots'] = false;
 191                         if( 'hideminor' === $bit ) $opts['hideminor'] = true;
 192                         if( 'minor' === $bit ) $opts['hideminor'] = false;
 193                         if( 'hideliu' === $bit ) $opts['hideliu'] = true;
 194                         if( 'hidepatrolled' === $bit ) $opts['hidepatrolled'] = true;
 195                         if( 'hideanons' === $bit ) $opts['hideanons'] = true;
 196                         if( 'hidemyself' === $bit ) $opts['hidemyself'] = true;
 197
 198                         if( is_numeric( $bit ) ) $opts['limit'] =  $bit;
 199
 200                         $m = array();
 201                         if( preg_match( '/^limit=(\d+)$/', $bit, $m ) ) $opts['limit'] = $m[1];
 202                         if( preg_match( '/^days=(\d+)$/', $bit, $m ) ) $opts['days'] = $m[1];
 203                 }
 204         }
 205
 206         /**
 207          * Get last modified date, for client caching
 208          * Don't use this if we are using the patrol feature, patrol changes don't
 209          * update the timestamp
 210          *
 211          * @param $feedFormat String
 212          * @return String or false
 213          */
 214         public function checkLastModified( $feedFormat ) {
 215                 global $wgOut, $wgUser;
 216                 $dbr = wfGetDB( DB_SLAVE );
 217                 $lastmod = $dbr->selectField( 'recentchanges', 'MAX(rc_timestamp)', false, __METHOD__ );
 218                 if( $feedFormat || !$wgUser->useRCPatrol() ) {
 219                         if( $lastmod && $wgOut->checkLastModified( $lastmod ) ) {
 220                                 # Client cache fresh and headers sent, nothing more to do.
 221                                 return false;
 222                         }
 223                 }
 224                 return $lastmod;
 225         }
 226
 227         /**
 228          * Return an array of conditions depending of options set in $opts
 229          *
 230          * @param $opts FormOptions
 231          * @return array
 232          */
 233         public function buildMainQueryConds( FormOptions $opts ) {
 234                 global $wgUser;
 235
 236                 $dbr = wfGetDB( DB_SLAVE );
 237                 $conds = array();
 238
 239                 # It makes no sense to hide both anons and logged-in users
 240                 # Where this occurs, force anons to be shown
 241                 $forcebot = false;
 242                 if( $opts['hideanons'] && $opts['hideliu'] ){
 243                         # Check if the user wants to show bots only
 244                         if( $opts['hidebots'] ){
 245                                 $opts['hideanons'] = false;
 246                         } else {
 247                                 $forcebot = true;
 248                                 $opts['hidebots'] = false;
 249                         }
 250                 }
 251
 252                 // Calculate cutoff
 253                 $cutoff_unixtime = time() - ( $opts['days'] * 86400 );
 254                 $cutoff_unixtime = $cutoff_unixtime - ($cutoff_unixtime % 86400);
 255                 $cutoff = $dbr->timestamp( $cutoff_unixtime );
 256
 257                 $fromValid = preg_match('/^[0-9]{14}$/', $opts['from']);
 258                 if( $fromValid && $opts['from'] > wfTimestamp(TS_MW,$cutoff) ) {
 259                         $cutoff = $dbr->timestamp($opts['from']);
 260                 } else {
 261                         $opts->reset( 'from' );
 262                 }
 263
 264                 $conds[] = 'rc_timestamp >= ' . $dbr->addQuotes( $cutoff );
 265
 266
 267                 $hidePatrol = $wgUser->useRCPatrol() && $opts['hidepatrolled'];
 268                 $hideLoggedInUsers = $opts['hideliu'] && !$forcebot;
 269                 $hideAnonymousUsers = $opts['hideanons'] && !$forcebot;
 270
 271                 if( $opts['hideminor'] )  $conds['rc_minor'] = 0;
 272                 if( $opts['hidebots'] )   $conds['rc_bot'] = 0;
 273                 if( $hidePatrol )         $conds['rc_patrolled'] = 0;
 274                 if( $forcebot )           $conds['rc_bot'] = 1;
 275                 if( $hideLoggedInUsers )  $conds[] = 'rc_user = 0';
 276                 if( $hideAnonymousUsers ) $conds[] = 'rc_user != 0';
 277
 278                 if( $opts['hidemyself'] ) {
 279                         if( $wgUser->getId() ) {
 280                                 $conds[] = 'rc_user != ' . $dbr->addQuotes( $wgUser->getId() );
 281                         } else {
 282                                 $conds[] = 'rc_user_text != ' . $dbr->addQuotes( $wgUser->getName() );
 283                         }
 284                 }
 285
 286                 # Namespace filtering
 287                 if( $opts['namespace'] !== '' ) {
 288                         $selectedNS = $dbr->addQuotes( $opts['namespace'] );
 289                         $operator = $opts['invert'] ? '!='  : '=';
 290                         $boolean  = $opts['invert'] ? 'AND' : 'OR';
 291
 292                         # namespace association (bug 2429)
 293                         if( !$opts['associated'] ) {
 294                                 $condition = "rc_namespace $operator $selectedNS";
 295                         } else {
 296                                 # Also add the associated namespace
 297                                 $associatedNS =  $dbr->addQuotes(
 298                                         MWNamespace::getAssociated( $opts['namespace'] )
 299                                 );
 300                                 $condition = "(rc_namespace $operator $selectedNS "
 301                                                    . $boolean
 302                                                    . " rc_namespace $operator $associatedNS)";
 303                         }
 304
 305                         $conds[] = $condition;
 306                 }
 307                 return $conds;
 308         }
 309
 310         /**
 311          * Process the query
 312          *
 313          * @param $conds Array
 314          * @param $opts FormOptions
 315          * @return database result or false (for Recentchangeslinked only)
 316          */
 317         public function doMainQuery( $conds, $opts ) {
 318                 global $wgUser;
 319
 320                 $tables = array( 'recentchanges' );
 321                 $join_conds = array();
 322                 $query_options = array( 'USE INDEX' => array('recentchanges' => 'rc_timestamp') );
 323
 324                 $uid = $wgUser->getId();
 325                 $dbr = wfGetDB( DB_SLAVE );
 326                 $limit = $opts['limit'];
 327                 $namespace = $opts['namespace'];
 328                 $select = '*';
 329                 $invert = $opts['invert'];
 330
 331                 // JOIN on watchlist for users
 332                 if( $uid ) {
 333                         $tables[] = 'watchlist';
 334                         $join_conds['watchlist'] = array('LEFT JOIN',
 335                                 "wl_user={$uid} AND wl_title=rc_title AND wl_namespace=rc_namespace");
 336                 }
 337                 if ($wgUser->isAllowed("rollback")) {
 338                         $tables[] = 'page';
 339                         $join_conds['page'] = array('LEFT JOIN', 'rc_cur_id=page_id');
 340                 }
 341                 if ( !$this->including() ) {
 342                         // Tag stuff.
 343                         // Doesn't work when transcluding. See bug 23293
 344                         $fields = array();
 345                         // Fields are * in this case, so let the function modify an empty array to keep it happy.
 346                         ChangeTags::modifyDisplayQuery(
 347                                 $tables, $fields, $conds, $join_conds, $query_options, $opts['tagfilter']
 348                         );
 349                 }
 350
 351                 if ( !wfRunHooks( 'SpecialRecentChangesQuery', array( &$conds, &$tables, &$join_conds, $opts, &$query_options, &$select ) ) )
 352                         return false;
 353
 354                 // Don't use the new_namespace_time timestamp index if:
 355                 // (a) "All namespaces" selected
 356                 // (b) We want all pages NOT in a certain namespaces (inverted)
 357                 // (c) There is a tag to filter on (use tag index instead)
 358                 // (d) UNION + sort/limit is not an option for the DBMS
 359                 if( is_null( $namespace )
 360                         || ( $invert && !is_null( $namespace ) )
 361                         || $opts['tagfilter'] != ''
 362                         || !$dbr->unionSupportsOrderAndLimit() )
 363                 {
 364                         $res = $dbr->select( $tables, '*', $conds, __METHOD__,
 365                                 array( 'ORDER BY' => 'rc_timestamp DESC', 'LIMIT' => $limit ) +
 366                                 $query_options,
 367                                 $join_conds );
 368                 // We have a new_namespace_time index! UNION over new=(0,1) and sort result set!
 369                 } else {
 370                         // New pages
 371                         $sqlNew = $dbr->selectSQLText( $tables, $select,
 372                                 array( 'rc_new' => 1 ) + $conds,
 373                                 __METHOD__,
 374                                 array( 'ORDER BY' => 'rc_timestamp DESC', 'LIMIT' => $limit,
 375                                         'USE INDEX' =>  array('recentchanges' => 'rc_timestamp') ),
 376                                 $join_conds );
 377                         // Old pages
 378                         $sqlOld = $dbr->selectSQLText( $tables, '*',
 379                                 array( 'rc_new' => 0 ) + $conds,
 380                                 __METHOD__,
 381                                 array( 'ORDER BY' => 'rc_timestamp DESC', 'LIMIT' => $limit,
 382                                         'USE INDEX' =>  array('recentchanges' => 'rc_timestamp') ),
 383                                 $join_conds );
 384                         # Join the two fast queries, and sort the result set
 385                         $sql = $dbr->unionQueries(array($sqlNew, $sqlOld), false).' ORDER BY rc_timestamp DESC';
 386                         $sql = $dbr->limitResult($sql, $limit, false);
 387                         $res = $dbr->query( $sql, __METHOD__ );
 388                 }
 389
 390                 return $res;
 391         }
 392
 393         /**
 394          * Send output to $wgOut, only called if not used feeds
 395          *
 396          * @param $rows Array of database rows
 397          * @param $opts FormOptions
 398          */
 399         public function webOutput( $rows, $opts ) {
 400                 global $wgOut, $wgUser, $wgRCShowWatchingUsers, $wgShowUpdatedMarker;
 401                 global $wgAllowCategorizedRecentChanges;
 402
 403                 $limit = $opts['limit'];
 404
 405                 if( !$this->including() ) {
 406                         // Output options box
 407                         $this->doHeader( $opts );
 408                 }
 409
 410                 // And now for the content
 411                 $wgOut->setFeedAppendQuery( $this->getFeedQuery() );
 412
 413                 if( $wgAllowCategorizedRecentChanges ) {
 414                         $this->filterByCategories( $rows, $opts );
 415                 }
 416
 417                 $showWatcherCount = $wgRCShowWatchingUsers && $wgUser->getOption( 'shownumberswatching' );
 418                 $watcherCache = array();
 419
 420                 $dbr = wfGetDB( DB_SLAVE );
 421
 422                 $counter = 1;
 423                 $list = ChangesList::newFromUser( $wgUser );
 424
 425                 $s = $list->beginRecentChangesList();
 426                 foreach( $rows as $obj ) {
 427                         if( $limit == 0 ) break;
 428                         $rc = RecentChange::newFromRow( $obj );
 429                         $rc->counter = $counter++;
 430                         # Check if the page has been updated since the last visit
 431                         if( $wgShowUpdatedMarker && !empty($obj->wl_notificationtimestamp) ) {
 432                                 $rc->notificationtimestamp = ($obj->rc_timestamp >= $obj->wl_notificationtimestamp);
 433                         } else {
 434                                 $rc->notificationtimestamp = false; // Default
 435                         }
 436                         # Check the number of users watching the page
 437                         $rc->numberofWatchingusers = 0; // Default
 438                         if( $showWatcherCount && $obj->rc_namespace >= 0 ) {
 439                                 if( !isset($watcherCache[$obj->rc_namespace][$obj->rc_title]) ) {
 440                                         $watcherCache[$obj->rc_namespace][$obj->rc_title] =
 441                                                  $dbr->selectField( 'watchlist',
 442                                                         'COUNT(*)',
 443                                                         array(
 444                                                                 'wl_namespace' => $obj->rc_namespace,
 445                                                                 'wl_title' => $obj->rc_title,
 446                                                         ),
 447                                                         __METHOD__ . '-watchers' );
 448                                 }
 449                                 $rc->numberofWatchingusers = $watcherCache[$obj->rc_namespace][$obj->rc_title];
 450                         }
 451                         $s .= $list->recentChangesLine( $rc, !empty( $obj->wl_user ), $counter );
 452                         --$limit;
 453                 }
 454                 $s .= $list->endRecentChangesList();
 455                 $wgOut->addHTML( $s );
 456         }
 457
 458         /**
 459          * Get the query string to append to feed link URLs.
 460          * This is overridden by RCL to add the target parameter
 461          */
 462         public function getFeedQuery() {
 463                 return false;
 464         }
 465
 466         /**
 467          * Return the text to be displayed above the changes
 468          *
 469          * @param $opts FormOptions
 470          * @return String: XHTML
 471          */
 472         public function doHeader( $opts ) {
 473                 global $wgScript, $wgOut;
 474
 475                 $this->setTopText( $wgOut, $opts );
 476
 477                 $defaults = $opts->getAllValues();
 478                 $nondefaults = $opts->getChangedValues();
 479                 $opts->consumeValues( array( 'namespace', 'invert', 'associated', 'tagfilter',
 480                         'categories', 'categories_any' ) );
 481
 482                 $panel = array();
 483                 $panel[] = $this->optionsPanel( $defaults, $nondefaults );
 484                 $panel[] = '<hr />';
 485
 486                 $extraOpts = $this->getExtraOptions( $opts );
 487                 $extraOptsCount = count( $extraOpts );
 488                 $count = 0;
 489                 $submit = ' ' . Xml::submitbutton( wfMsg( 'allpagessubmit' ) );
 490
 491                 $out = Xml::openElement( 'table', array( 'class' => 'mw-recentchanges-table' ) );
 492                 foreach( $extraOpts as $optionRow ) {
 493                         # Add submit button to the last row only
 494                         ++$count;
 495                         $addSubmit = $count === $extraOptsCount ? $submit : '';
 496
 497                         $out .= Xml::openElement( 'tr' );
 498                         if( is_array( $optionRow ) ) {
 499                                 $out .= Xml::tags( 'td', array( 'class' => 'mw-label' ), $optionRow[0] );
 500                                 $out .= Xml::tags( 'td', array( 'class' => 'mw-input' ), $optionRow[1] . $addSubmit );
 501                         } else {
 502                                 $out .= Xml::tags( 'td', array( 'class' => 'mw-input', 'colspan' => 2 ), $optionRow . $addSubmit );
 503                         }
 504                         $out .= Xml::closeElement( 'tr' );
 505                 }
 506                 $out .= Xml::closeElement( 'table' );
 507
 508                 $unconsumed = $opts->getUnconsumedValues();
 509                 foreach( $unconsumed as $key => $value ) {
 510                         $out .= Html::hidden( $key, $value );
 511                 }
 512
 513                 $t = $this->getTitle();
 514                 $out .= Html::hidden( 'title', $t->getPrefixedText() );
 515                 $form = Xml::tags( 'form', array( 'action' => $wgScript ), $out );
 516                 $panel[] = $form;
 517                 $panelString = implode( "\n", $panel );
 518
 519                 $wgOut->addHTML(
 520                         Xml::fieldset( wfMsg( 'recentchanges-legend' ), $panelString, array( 'class' => 'rcoptions' ) )
 521                 );
 522
 523                 $this->setBottomText( $wgOut, $opts );
 524         }
 525
 526         /**
 527          * Get options to be displayed in a form
 528          *
 529          * @param $opts FormOptions
 530          * @return Array
 531          */
 532         function getExtraOptions( $opts ){
 533                 $extraOpts = array();
 534                 $extraOpts['namespace'] = $this->namespaceFilterForm( $opts );
 535
 536                 global $wgAllowCategorizedRecentChanges;
 537                 if( $wgAllowCategorizedRecentChanges ) {
 538                         $extraOpts['category'] = $this->categoryFilterForm( $opts );
 539                 }
 540
 541                 $tagFilter = ChangeTags::buildTagFilterSelector( $opts['tagfilter'] );
 542                 if ( count($tagFilter) )
 543                         $extraOpts['tagfilter'] = $tagFilter;
 544
 545                 wfRunHooks( 'SpecialRecentChangesPanel', array( &$extraOpts, $opts ) );
 546                 return $extraOpts;
 547         }
 548
 549         /**
 550          * Send the text to be displayed above the options
 551          *
 552          * @param $out OutputPage
 553          * @param $opts FormOptions
 554          */
 555         function setTopText( OutputPage $out, FormOptions $opts ){
 556                 $out->addWikiText( wfMsgForContentNoTrans( 'recentchangestext' ) );
 557         }
 558
 559         /**
 560          * Send the text to be displayed after the options, for use in
 561          * Recentchangeslinked
 562          *
 563          * @param $out OutputPage
 564          * @param $opts FormOptions
 565          */
 566         function setBottomText( OutputPage $out, FormOptions $opts ){}
 567
 568         /**
 569          * Creates the choose namespace selection
 570          *
 571          * @todo Uses radio buttons (HASHAR)
 572          * @param $opts FormOptions
 573          * @return String
 574          */
 575         protected function namespaceFilterForm( FormOptions $opts ) {
 576                 $nsSelect = Xml::namespaceSelector( $opts['namespace'], '' );
 577                 $nsLabel = Xml::label( wfMsg('namespace'), 'namespace' );
 578                 $invert = Xml::checkLabel( wfMsg('invert'), 'invert', 'nsinvert', $opts['invert'] );
 579                 $associated = Xml::checkLabel( wfMsg('namespace_association'), 'associated', 'nsassociated', $opts['associated'] );
 580                 return array( $nsLabel, "$nsSelect $invert $associated" );
 581         }
 582
 583         /**
 584          * Create a input to filter changes by categories
 585          *
 586          * @param $opts FormOptions
 587          * @return Array
 588          */
 589         protected function categoryFilterForm( FormOptions $opts ) {
 590                 list( $label, $input ) = Xml::inputLabelSep( wfMsg('rc_categories'),
 591                         'categories', 'mw-categories', false, $opts['categories'] );
 592
 593                 $input .= ' ' . Xml::checkLabel( wfMsg('rc_categories_any'),
 594                         'categories_any', 'mw-categories_any', $opts['categories_any'] );
 595
 596                 return array( $label, $input );
 597         }
 598
 599         /**
 600          * Filter $rows by categories set in $opts
 601          *
 602          * @param $rows Array of database rows
 603          * @param $opts FormOptions
 604          */
 605         function filterByCategories( &$rows, FormOptions $opts ) {
 606                 $categories = array_map( 'trim', explode( '|' , $opts['categories'] ) );
 607
 608                 if( !count( $categories ) ) {
 609                         return;
 610                 }
 611
 612                 # Filter categories
 613                 $cats = array();
 614                 foreach( $categories as $cat ) {
 615                         $cat = trim( $cat );
 616                         if( $cat == '' ) continue;
 617                         $cats[] = $cat;
 618                 }
 619
 620                 # Filter articles
 621                 $articles = array();
 622                 $a2r = array();
 623                 $rowsarr = array();
 624                 foreach( $rows AS $k => $r ) {
 625                         $nt = Title::makeTitle( $r->rc_namespace, $r->rc_title );
 626                         $id = $nt->getArticleID();
 627                         if( $id == 0 ) continue; # Page might have been deleted...
 628                         if( !in_array( $id, $articles ) ) {
 629                                 $articles[] = $id;
 630                         }
 631                         if( !isset( $a2r[$id] ) ) {
 632                                 $a2r[$id] = array();
 633                         }
 634                         $a2r[$id][] = $k;
 635                         $rowsarr[$k] = $r;
 636                 }
 637
 638                 # Shortcut?
 639                 if( !count( $articles ) || !count( $cats ) )
 640                         return ;
 641
 642                 # Look up
 643                 $c = new Categoryfinder;
 644                 $c->seed( $articles, $cats, $opts['categories_any'] ? "OR" : "AND" ) ;
 645                 $match = $c->run();
 646
 647                 # Filter
 648                 $newrows = array();
 649                 foreach( $match AS $id ) {
 650                         foreach( $a2r[$id] AS $rev ) {
 651                                 $k = $rev;
 652                                 $newrows[$k] = $rowsarr[$k];
 653                         }
 654                 }
 655                 $rows = $newrows;
 656         }
 657
 658         /**
 659          * Makes change an option link which carries all the other options
 660          *
 661          * @param $title Title
 662          * @param $override Array: options to override
 663          * @param $options Array: current options
 664          * @param $active Boolean: whether to show the link in bold
 665          */
 666         function makeOptionsLink( $title, $override, $options, $active = false ) {
 667                 global $wgUser;
 668                 $sk = $wgUser->getSkin();
 669                 $params = $override + $options;
 670                 if ( $active ) {
 671                         return $sk->link( $this->getTitle(), '<strong>' . htmlspecialchars( $title ) . '</strong>',
 672                                                           array(), $params, array( 'known' ) );
 673                 } else {
 674                         return $sk->link( $this->getTitle(), htmlspecialchars( $title ), array() , $params, array( 'known' ) );
 675                 }
 676         }
 677
 678         /**
 679          * Creates the options panel.
 680          *
 681          * @param $defaults Array
 682          * @param $nondefaults Array
 683          */
 684         function optionsPanel( $defaults, $nondefaults ) {
 685                 global $wgLang, $wgUser, $wgRCLinkLimits, $wgRCLinkDays;
 686
 687                 $options = $nondefaults + $defaults;
 688
 689                 $note = '';
 690                 if( !wfEmptyMsg( 'rclegend' ) ) {
 691                         $note .= '<div class="mw-rclegend">' . wfMsgExt( 'rclegend', array('parseinline') ) . "</div>\n";
 692                 }
 693                 if( $options['from'] ) {
 694                         $note .= wfMsgExt( 'rcnotefrom', array( 'parseinline' ),
 695                                 $wgLang->formatNum( $options['limit'] ),
 696                                 $wgLang->timeanddate( $options['from'], true ),
 697                                 $wgLang->date( $options['from'], true ),
 698                                 $wgLang->time( $options['from'], true ) ) . '<br />';
 699                 }
 700
 701                 # Sort data for display and make sure it's unique after we've added user data.
 702                 $wgRCLinkLimits[] = $options['limit'];
 703                 $wgRCLinkDays[] = $options['days'];
 704                 sort( $wgRCLinkLimits );
 705                 sort( $wgRCLinkDays );
 706                 $wgRCLinkLimits = array_unique( $wgRCLinkLimits );
 707                 $wgRCLinkDays = array_unique( $wgRCLinkDays );
 708
 709                 // limit links
 710                 foreach( $wgRCLinkLimits as $value ) {
 711                         $cl[] = $this->makeOptionsLink( $wgLang->formatNum( $value ),
 712                                 array( 'limit' => $value ), $nondefaults, $value == $options['limit'] ) ;
 713                 }
 714                 $cl = $wgLang->pipeList( $cl );
 715
 716                 // day links, reset 'from' to none
 717                 foreach( $wgRCLinkDays as $value ) {
 718                         $dl[] = $this->makeOptionsLink( $wgLang->formatNum( $value ),
 719                                 array( 'days' => $value, 'from' => '' ), $nondefaults, $value == $options['days'] ) ;
 720                 }
 721                 $dl = $wgLang->pipeList( $dl );
 722
 723
 724                 // show/hide links
 725                 $showhide = array( wfMsg( 'show' ), wfMsg( 'hide' ) );
 726                 $minorLink = $this->makeOptionsLink( $showhide[1-$options['hideminor']],
 727                         array( 'hideminor' => 1-$options['hideminor'] ), $nondefaults);
 728                 $botLink = $this->makeOptionsLink( $showhide[1-$options['hidebots']],
 729                         array( 'hidebots' => 1-$options['hidebots'] ), $nondefaults);
 730                 $anonsLink = $this->makeOptionsLink( $showhide[ 1 - $options['hideanons'] ],
 731                         array( 'hideanons' => 1 - $options['hideanons'] ), $nondefaults );
 732                 $liuLink   = $this->makeOptionsLink( $showhide[1-$options['hideliu']],
 733                         array( 'hideliu' => 1-$options['hideliu'] ), $nondefaults);
 734                 $patrLink  = $this->makeOptionsLink( $showhide[1-$options['hidepatrolled']],
 735                         array( 'hidepatrolled' => 1-$options['hidepatrolled'] ), $nondefaults);
 736                 $myselfLink = $this->makeOptionsLink( $showhide[1-$options['hidemyself']],
 737                         array( 'hidemyself' => 1-$options['hidemyself'] ), $nondefaults);
 738
 739                 $links[] = wfMsgHtml( 'rcshowhideminor', $minorLink );
 740                 $links[] = wfMsgHtml( 'rcshowhidebots', $botLink );
 741                 $links[] = wfMsgHtml( 'rcshowhideanons', $anonsLink );
 742                 $links[] = wfMsgHtml( 'rcshowhideliu', $liuLink );
 743                 if( $wgUser->useRCPatrol() )
 744                         $links[] = wfMsgHtml( 'rcshowhidepatr', $patrLink );
 745                 $links[] = wfMsgHtml( 'rcshowhidemine', $myselfLink );
 746                 $hl = $wgLang->pipeList( $links );
 747
 748                 // show from this onward link
 749                 $now = $wgLang->timeanddate( wfTimestampNow(), true );
 750                 $tl =  $this->makeOptionsLink( $now, array( 'from' => wfTimestampNow() ), $nondefaults );
 751
 752                 $rclinks = wfMsgExt( 'rclinks', array( 'parseinline', 'replaceafter' ),
 753                         $cl, $dl, $hl );
 754                 $rclistfrom = wfMsgExt( 'rclistfrom', array( 'parseinline', 'replaceafter' ), $tl );
 755                 return "{$note}$rclinks<br />$rclistfrom";
 756         }
 757 }