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         protected $customFilters;
  32
  33         public function __construct( $name = 'Recentchanges' ) {
  34                 parent::__construct( $name );
  35         }
  36
  37         /**
  38          * Get a FormOptions object containing the default options
  39          *
  40          * @return FormOptions
  41          */
  42         public function getDefaultOptions() {
  43                 $opts = new FormOptions();
  44
  45                 $opts->add( 'days',  (int)$this->getUser()->getOption( 'rcdays' ) );
  46                 $opts->add( 'limit', (int)$this->getUser()->getOption( 'rclimit' ) );
  47                 $opts->add( 'from', '' );
  48
  49                 $opts->add( 'hideminor',     $this->getUser()->getBoolOption( 'hideminor' ) );
  50                 $opts->add( 'hidebots',      true  );
  51                 $opts->add( 'hideanons',     false );
  52                 $opts->add( 'hideliu',       false );
  53                 $opts->add( 'hidepatrolled', $this->getUser()->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          * @param $parameters array
  70          *
  71          * @return FormOptions
  72          */
  73         public function setup( $parameters ) {
  74                 $opts = $this->getDefaultOptions();
  75
  76                 foreach( $this->getCustomFilters() as $key => $params ) {
  77                         $opts->add( $key, $params['default'] );
  78                 }
  79
  80                 $opts->fetchValuesFromRequest( $this->getRequest() );
  81
  82                 // Give precedence to subpage syntax
  83                 if( $parameters !== null ) {
  84                         $this->parseParameters( $parameters, $opts );
  85                 }
  86
  87                 $opts->validateIntBounds( 'limit', 0, 5000 );
  88                 return $opts;
  89         }
  90
  91         /**
  92          * Get custom show/hide filters
  93          *
  94          * @return Array Map of filter URL param names to properties (msg/default)
  95          */
  96         protected function getCustomFilters() {
  97                 if ( $this->customFilters === null ) {
  98                         $this->customFilters = array();
  99                         wfRunHooks( 'SpecialRecentChangesFilters', array( $this, &$this->customFilters ) );
 100                 }
 101                 return $this->customFilters;
 102         }
 103
 104         /**
 105          * Create a FormOptions object specific for feed requests and return it
 106          *
 107          * @return FormOptions
 108          */
 109         public function feedSetup() {
 110                 global $wgFeedLimit;
 111                 $opts = $this->getDefaultOptions();
 112                 # Feed is cached on limit,hideminor,namespace; other params would randomly not work
 113                 $opts->fetchValuesFromRequest( $this->getRequest(), array( 'limit', 'hideminor', 'namespace' ) );
 114                 $opts->validateIntBounds( 'limit', 0, $wgFeedLimit );
 115                 return $opts;
 116         }
 117
 118         /**
 119          * Get the current FormOptions for this request
 120          */
 121         public function getOptions() {
 122                 if ( $this->rcOptions === null ) {
 123                         if ( $this->including() ) {
 124                                 $isFeed = false;
 125                         } else {
 126                                 $isFeed = (bool)$this->getRequest()->getVal( 'feed' );
 127                         }
 128                         $this->rcOptions = $isFeed ? $this->feedSetup() : $this->setup( $this->rcSubpage );
 129                 }
 130                 return $this->rcOptions;
 131         }
 132
 133
 134         /**
 135          * Main execution point
 136          *
 137          * @param $subpage String
 138          */
 139         public function execute( $subpage ) {
 140                 $this->rcSubpage = $subpage;
 141                 $feedFormat = $this->including() ? null : $this->getRequest()->getVal( 'feed' );
 142
 143                 # 10 seconds server-side caching max
 144                 $this->getOutput()->setSquidMaxage( 10 );
 145                 # Check if the client has a cached version
 146                 $lastmod = $this->checkLastModified( $feedFormat );
 147                 if( $lastmod === false ) {
 148                         return;
 149                 }
 150
 151                 $opts = $this->getOptions();
 152                 $this->setHeaders();
 153                 $this->outputHeader();
 154                 $this->addRecentChangesJS();
 155
 156                 // Fetch results, prepare a batch link existence check query
 157                 $conds = $this->buildMainQueryConds( $opts );
 158                 $rows = $this->doMainQuery( $conds, $opts );
 159                 if( $rows === false ){
 160                         if( !$this->including() ) {
 161                                 $this->doHeader( $opts );
 162                         }
 163                         return;
 164                 }
 165
 166                 if( !$feedFormat ) {
 167                         $batch = new LinkBatch;
 168                         foreach( $rows as $row ) {
 169                                 $batch->add( NS_USER, $row->rc_user_text );
 170                                 $batch->add( NS_USER_TALK, $row->rc_user_text );
 171                                 $batch->add( $row->rc_namespace, $row->rc_title );
 172                         }
 173                         $batch->execute();
 174                 }
 175                 if( $feedFormat ) {
 176                         list( $changesFeed, $formatter ) = $this->getFeedObject( $feedFormat );
 177                         $changesFeed->execute( $formatter, $rows, $lastmod, $opts );
 178                 } else {
 179                         $this->webOutput( $rows, $opts );
 180                 }
 181
 182                 $rows->free();
 183         }
 184
 185         /**
 186          * Return an array with a ChangesFeed object and ChannelFeed object
 187          *
 188          * @return Array
 189          */
 190         public function getFeedObject( $feedFormat ){
 191                 $changesFeed = new ChangesFeed( $feedFormat, 'rcfeed' );
 192                 $formatter = $changesFeed->getFeedObject(
 193                         wfMsgForContent( 'recentchanges' ),
 194                         wfMsgForContent( 'recentchanges-feed-description' ),
 195                         $this->getTitle()->getFullURL()
 196                 );
 197                 return array( $changesFeed, $formatter );
 198         }
 199
 200         /**
 201          * Process $par and put options found if $opts
 202          * Mainly used when including the page
 203          *
 204          * @param $par String
 205          * @param $opts FormOptions
 206          */
 207         public function parseParameters( $par, FormOptions $opts ) {
 208                 $bits = preg_split( '/\s*,\s*/', trim( $par ) );
 209                 foreach( $bits as $bit ) {
 210                         if( 'hidebots' === $bit ) {
 211                                 $opts['hidebots'] = true;
 212                         }
 213                         if( 'bots' === $bit ) {
 214                                 $opts['hidebots'] = false;
 215                         }
 216                         if( 'hideminor' === $bit ) {
 217                                 $opts['hideminor'] = true;
 218                         }
 219                         if( 'minor' === $bit ) {
 220                                 $opts['hideminor'] = false;
 221                         }
 222                         if( 'hideliu' === $bit ) {
 223                                 $opts['hideliu'] = true;
 224                         }
 225                         if( 'hidepatrolled' === $bit ) {
 226                                 $opts['hidepatrolled'] = true;
 227                         }
 228                         if( 'hideanons' === $bit ) {
 229                                 $opts['hideanons'] = true;
 230                         }
 231                         if( 'hidemyself' === $bit ) {
 232                                 $opts['hidemyself'] = true;
 233                         }
 234
 235                         if( is_numeric( $bit ) ) {
 236                                 $opts['limit'] =  $bit;
 237                         }
 238
 239                         $m = array();
 240                         if( preg_match( '/^limit=(\d+)$/', $bit, $m ) ) {
 241                                 $opts['limit'] = $m[1];
 242                         }
 243                         if( preg_match( '/^days=(\d+)$/', $bit, $m ) ) {
 244                                 $opts['days'] = $m[1];
 245                         }
 246                         if( preg_match( '/^namespace=(\d+)$/', $bit, $m ) ) {
 247                                 $opts['namespace'] = $m[1];
 248                         }
 249                 }
 250         }
 251
 252         /**
 253          * Get last modified date, for client caching
 254          * Don't use this if we are using the patrol feature, patrol changes don't
 255          * update the timestamp
 256          *
 257          * @param $feedFormat String
 258          * @return String or false
 259          */
 260         public function checkLastModified( $feedFormat ) {
 261                 $dbr = wfGetDB( DB_SLAVE );
 262                 $lastmod = $dbr->selectField( 'recentchanges', 'MAX(rc_timestamp)', false, __METHOD__ );
 263                 if( $feedFormat || !$this->getUser()->useRCPatrol() ) {
 264                         if( $lastmod && $this->getOutput()->checkLastModified( $lastmod ) ) {
 265                                 # Client cache fresh and headers sent, nothing more to do.
 266                                 return false;
 267                         }
 268                 }
 269                 return $lastmod;
 270         }
 271
 272         /**
 273          * Return an array of conditions depending of options set in $opts
 274          *
 275          * @param $opts FormOptions
 276          * @return array
 277          */
 278         public function buildMainQueryConds( FormOptions $opts ) {
 279                 $dbr = wfGetDB( DB_SLAVE );
 280                 $conds = array();
 281
 282                 # It makes no sense to hide both anons and logged-in users
 283                 # Where this occurs, force anons to be shown
 284                 $forcebot = false;
 285                 if( $opts['hideanons'] && $opts['hideliu'] ){
 286                         # Check if the user wants to show bots only
 287                         if( $opts['hidebots'] ){
 288                                 $opts['hideanons'] = false;
 289                         } else {
 290                                 $forcebot = true;
 291                                 $opts['hidebots'] = false;
 292                         }
 293                 }
 294
 295                 // Calculate cutoff
 296                 $cutoff_unixtime = time() - ( $opts['days'] * 86400 );
 297                 $cutoff_unixtime = $cutoff_unixtime - ($cutoff_unixtime % 86400);
 298                 $cutoff = $dbr->timestamp( $cutoff_unixtime );
 299
 300                 $fromValid = preg_match('/^[0-9]{14}$/', $opts['from']);
 301                 if( $fromValid && $opts['from'] > wfTimestamp(TS_MW,$cutoff) ) {
 302                         $cutoff = $dbr->timestamp($opts['from']);
 303                 } else {
 304                         $opts->reset( 'from' );
 305                 }
 306
 307                 $conds[] = 'rc_timestamp >= ' . $dbr->addQuotes( $cutoff );
 308
 309                 $hidePatrol = $this->getUser()->useRCPatrol() && $opts['hidepatrolled'];
 310                 $hideLoggedInUsers = $opts['hideliu'] && !$forcebot;
 311                 $hideAnonymousUsers = $opts['hideanons'] && !$forcebot;
 312
 313                 if( $opts['hideminor'] ) {
 314                         $conds['rc_minor'] = 0;
 315                 }
 316                 if( $opts['hidebots'] ) {
 317                         $conds['rc_bot'] = 0;
 318                 }
 319                 if( $hidePatrol ) {
 320                         $conds['rc_patrolled'] = 0;
 321                 }
 322                 if( $forcebot ) {
 323                         $conds['rc_bot'] = 1;
 324                 }
 325                 if( $hideLoggedInUsers ) {
 326                         $conds[] = 'rc_user = 0';
 327                 }
 328                 if( $hideAnonymousUsers ) {
 329                         $conds[] = 'rc_user != 0';
 330                 }
 331
 332                 if( $opts['hidemyself'] ) {
 333                         if( $this->getUser()->getId() ) {
 334                                 $conds[] = 'rc_user != ' . $dbr->addQuotes( $this->getUser()->getId() );
 335                         } else {
 336                                 $conds[] = 'rc_user_text != ' . $dbr->addQuotes( $this->getUser()->getName() );
 337                         }
 338                 }
 339
 340                 # Namespace filtering
 341                 if( $opts['namespace'] !== '' ) {
 342                         $selectedNS = $dbr->addQuotes( $opts['namespace'] );
 343                         $operator = $opts['invert'] ? '!='  : '=';
 344                         $boolean  = $opts['invert'] ? 'AND' : 'OR';
 345
 346                         # namespace association (bug 2429)
 347                         if( !$opts['associated'] ) {
 348                                 $condition = "rc_namespace $operator $selectedNS";
 349                         } else {
 350                                 # Also add the associated namespace
 351                                 $associatedNS = $dbr->addQuotes(
 352                                         MWNamespace::getAssociated( $opts['namespace'] )
 353                                 );
 354                                 $condition = "(rc_namespace $operator $selectedNS "
 355                                                    . $boolean
 356                                                    . " rc_namespace $operator $associatedNS)";
 357                         }
 358
 359                         $conds[] = $condition;
 360                 }
 361                 return $conds;
 362         }
 363
 364         /**
 365          * Process the query
 366          *
 367          * @param $conds Array
 368          * @param $opts FormOptions
 369          * @return bool|ResultWrapper result or false (for Recentchangeslinked only)
 370          */
 371         public function doMainQuery( $conds, $opts ) {
 372                 $tables = array( 'recentchanges' );
 373                 $join_conds = array();
 374                 $query_options = array(
 375                         'USE INDEX' => array( 'recentchanges' => 'rc_timestamp' )
 376                 );
 377
 378                 $uid = $this->getUser()->getId();
 379                 $dbr = wfGetDB( DB_SLAVE );
 380                 $limit = $opts['limit'];
 381                 $namespace = $opts['namespace'];
 382                 $invert = $opts['invert'];
 383                 $associated = $opts['associated'];
 384
 385                 $fields = array( $dbr->tableName( 'recentchanges' ) . '.*' ); // all rc columns
 386                 // JOIN on watchlist for users
 387                 if ( $uid ) {
 388                         $tables[] = 'watchlist';
 389                         $fields[] = 'wl_user';
 390                         $fields[] = 'wl_notificationtimestamp';
 391                         $join_conds['watchlist'] = array('LEFT JOIN',
 392                                 "wl_user={$uid} AND wl_title=rc_title AND wl_namespace=rc_namespace");
 393                 }
 394                 if ( $this->getUser()->isAllowed( 'rollback' ) ) {
 395                         $tables[] = 'page';
 396                         $fields[] = 'page_latest';
 397                         $join_conds['page'] = array('LEFT JOIN', 'rc_cur_id=page_id');
 398                 }
 399                 if ( !$this->including() ) {
 400                         // Tag stuff.
 401                         // Doesn't work when transcluding. See bug 23293
 402                         ChangeTags::modifyDisplayQuery(
 403                                 $tables, $fields, $conds, $join_conds, $query_options,
 404                                 $opts['tagfilter']
 405                         );
 406                 }
 407
 408                 if ( !wfRunHooks( 'SpecialRecentChangesQuery',
 409                         array( &$conds, &$tables, &$join_conds, $opts, &$query_options, &$fields ) ) )
 410                 {
 411                         return false;
 412                 }
 413
 414                 // Don't use the new_namespace_time timestamp index if:
 415                 // (a) "All namespaces" selected
 416                 // (b) We want pages in more than one namespace (inverted/associated)
 417                 // (c) There is a tag to filter on (use tag index instead)
 418                 // (d) UNION + sort/limit is not an option for the DBMS
 419                 if( $namespace === ''
 420                         || ( $invert || $associated )
 421                         || $opts['tagfilter'] != ''
 422                         || !$dbr->unionSupportsOrderAndLimit() )
 423                 {
 424                         $res = $dbr->select( $tables, $fields, $conds, __METHOD__,
 425                                 array( 'ORDER BY' => 'rc_timestamp DESC', 'LIMIT' => $limit ) +
 426                                 $query_options,
 427                                 $join_conds );
 428                 // We have a new_namespace_time index! UNION over new=(0,1) and sort result set!
 429                 } else {
 430                         // New pages
 431                         $sqlNew = $dbr->selectSQLText(
 432                                 $tables,
 433                                 $fields,
 434                                 array( 'rc_new' => 1 ) + $conds,
 435                                 __METHOD__,
 436                                 array(
 437                                         'ORDER BY' => 'rc_timestamp DESC',
 438                                         'LIMIT' => $limit,
 439                                         'USE INDEX' => array( 'recentchanges' => 'new_name_timestamp' )
 440                                 ),
 441                                 $join_conds
 442                         );
 443                         // Old pages
 444                         $sqlOld = $dbr->selectSQLText(
 445                                 $tables,
 446                                 $fields,
 447                                 array( 'rc_new' => 0 ) + $conds,
 448                                 __METHOD__,
 449                                 array(
 450                                         'ORDER BY' => 'rc_timestamp DESC',
 451                                         'LIMIT' => $limit,
 452                                         'USE INDEX' => array( 'recentchanges' => 'new_name_timestamp' )
 453                                 ),
 454                                 $join_conds
 455                         );
 456                         # Join the two fast queries, and sort the result set
 457                         $sql = $dbr->unionQueries( array( $sqlNew, $sqlOld ), false ) .
 458                                 ' ORDER BY rc_timestamp DESC';
 459                         $sql = $dbr->limitResult( $sql, $limit, false );
 460                         $res = $dbr->query( $sql, __METHOD__ );
 461                 }
 462
 463                 return $res;
 464         }
 465
 466         /**
 467          * Send output to the OutputPage object, only called if not used feeds
 468          *
 469          * @param $rows Array of database rows
 470          * @param $opts FormOptions
 471          */
 472         public function webOutput( $rows, $opts ) {
 473                 global $wgRCShowWatchingUsers, $wgShowUpdatedMarker, $wgAllowCategorizedRecentChanges;
 474
 475                 $limit = $opts['limit'];
 476
 477                 if( !$this->including() ) {
 478                         // Output options box
 479                         $this->doHeader( $opts );
 480                 }
 481
 482                 // And now for the content
 483                 $this->getOutput()->setFeedAppendQuery( $this->getFeedQuery() );
 484
 485                 if( $wgAllowCategorizedRecentChanges ) {
 486                         $this->filterByCategories( $rows, $opts );
 487                 }
 488
 489                 $showWatcherCount = $wgRCShowWatchingUsers && $this->getUser()->getOption( 'shownumberswatching' );
 490                 $watcherCache = array();
 491
 492                 $dbr = wfGetDB( DB_SLAVE );
 493
 494                 $counter = 1;
 495                 $list = ChangesList::newFromContext( $this->getContext() );
 496
 497                 $s = $list->beginRecentChangesList();
 498                 foreach( $rows as $obj ) {
 499                         if( $limit == 0 ) {
 500                                 break;
 501                         }
 502                         $rc = RecentChange::newFromRow( $obj );
 503                         $rc->counter = $counter++;
 504                         # Check if the page has been updated since the last visit
 505                         if( $wgShowUpdatedMarker && !empty( $obj->wl_notificationtimestamp ) ) {
 506                                 $rc->notificationtimestamp = ( $obj->rc_timestamp >= $obj->wl_notificationtimestamp );
 507                         } else {
 508                                 $rc->notificationtimestamp = false; // Default
 509                         }
 510                         # Check the number of users watching the page
 511                         $rc->numberofWatchingusers = 0; // Default
 512                         if( $showWatcherCount && $obj->rc_namespace >= 0 ) {
 513                                 if( !isset( $watcherCache[$obj->rc_namespace][$obj->rc_title] ) ) {
 514                                         $watcherCache[$obj->rc_namespace][$obj->rc_title] =
 515                                                 $dbr->selectField(
 516                                                         'watchlist',
 517                                                         'COUNT(*)',
 518                                                         array(
 519                                                                 'wl_namespace' => $obj->rc_namespace,
 520                                                                 'wl_title' => $obj->rc_title,
 521                                                         ),
 522                                                         __METHOD__ . '-watchers'
 523                                                 );
 524                                 }
 525                                 $rc->numberofWatchingusers = $watcherCache[$obj->rc_namespace][$obj->rc_title];
 526                         }
 527                         $s .= $list->recentChangesLine( $rc, !empty( $obj->wl_user ), $counter );
 528                         --$limit;
 529                 }
 530                 $s .= $list->endRecentChangesList();
 531                 $this->getOutput()->addHTML( $s );
 532         }
 533
 534         /**
 535          * Get the query string to append to feed link URLs.
 536          * This is overridden by RCL to add the target parameter
 537          */
 538         public function getFeedQuery() {
 539                 return false;
 540         }
 541
 542         /**
 543          * Return the text to be displayed above the changes
 544          *
 545          * @param $opts FormOptions
 546          * @return String: XHTML
 547          */
 548         public function doHeader( $opts ) {
 549                 global $wgScript;
 550
 551                 $this->setTopText( $opts );
 552
 553                 $defaults = $opts->getAllValues();
 554                 $nondefaults = $opts->getChangedValues();
 555                 $opts->consumeValues( array(
 556                         'namespace', 'invert', 'associated', 'tagfilter',
 557                         'categories', 'categories_any'
 558                 ) );
 559
 560                 $panel = array();
 561                 $panel[] = $this->optionsPanel( $defaults, $nondefaults );
 562                 $panel[] = '<hr />';
 563
 564                 $extraOpts = $this->getExtraOptions( $opts );
 565                 $extraOptsCount = count( $extraOpts );
 566                 $count = 0;
 567                 $submit = ' ' . Xml::submitbutton( wfMsg( 'allpagessubmit' ) );
 568
 569                 $out = Xml::openElement( 'table', array( 'class' => 'mw-recentchanges-table' ) );
 570                 foreach( $extraOpts as $optionRow ) {
 571                         # Add submit button to the last row only
 572                         ++$count;
 573                         $addSubmit = $count === $extraOptsCount ? $submit : '';
 574
 575                         $out .= Xml::openElement( 'tr' );
 576                         if( is_array( $optionRow ) ) {
 577                                 $out .= Xml::tags( 'td', array( 'class' => 'mw-label' ), $optionRow[0] );
 578                                 $out .= Xml::tags( 'td', array( 'class' => 'mw-input' ), $optionRow[1] . $addSubmit );
 579                         } else {
 580                                 $out .= Xml::tags( 'td', array( 'class' => 'mw-input', 'colspan' => 2 ), $optionRow . $addSubmit );
 581                         }
 582                         $out .= Xml::closeElement( 'tr' );
 583                 }
 584                 $out .= Xml::closeElement( 'table' );
 585
 586                 $unconsumed = $opts->getUnconsumedValues();
 587                 foreach( $unconsumed as $key => $value ) {
 588                         $out .= Html::hidden( $key, $value );
 589                 }
 590
 591                 $t = $this->getTitle();
 592                 $out .= Html::hidden( 'title', $t->getPrefixedText() );
 593                 $form = Xml::tags( 'form', array( 'action' => $wgScript ), $out );
 594                 $panel[] = $form;
 595                 $panelString = implode( "\n", $panel );
 596
 597                 $this->getOutput()->addHTML(
 598                         Xml::fieldset( wfMsg( 'recentchanges-legend' ), $panelString, array( 'class' => 'rcoptions' ) )
 599                 );
 600
 601                 $this->setBottomText( $opts );
 602         }
 603
 604         /**
 605          * Get options to be displayed in a form
 606          *
 607          * @param $opts FormOptions
 608          * @return Array
 609          */
 610         function getExtraOptions( $opts ) {
 611                 $extraOpts = array();
 612                 $extraOpts['namespace'] = $this->namespaceFilterForm( $opts );
 613
 614                 global $wgAllowCategorizedRecentChanges;
 615                 if( $wgAllowCategorizedRecentChanges ) {
 616                         $extraOpts['category'] = $this->categoryFilterForm( $opts );
 617                 }
 618
 619                 $tagFilter = ChangeTags::buildTagFilterSelector( $opts['tagfilter'] );
 620                 if ( count( $tagFilter ) ) {
 621                         $extraOpts['tagfilter'] = $tagFilter;
 622                 }
 623
 624                 wfRunHooks( 'SpecialRecentChangesPanel', array( &$extraOpts, $opts ) );
 625                 return $extraOpts;
 626         }
 627
 628         /**
 629          * Send the text to be displayed above the options
 630          *
 631          * @param $opts FormOptions
 632          */
 633         function setTopText( FormOptions $opts ) {
 634                 global $wgContLang;
 635                 $this->getOutput()->addWikiText(
 636                 Html::rawElement( 'p',
 637                         array( 'lang' => $wgContLang->getCode(), 'dir' => $wgContLang->getDir() ),
 638                         "\n" . wfMsgForContentNoTrans( 'recentchangestext' ) . "\n"
 639                 ), false );
 640         }
 641
 642         /**
 643          * Send the text to be displayed after the options, for use in
 644          * Recentchangeslinked
 645          *
 646          * @param $opts FormOptions
 647          */
 648         function setBottomText( FormOptions $opts ) {}
 649
 650         /**
 651          * Creates the choose namespace selection
 652          *
 653          * @todo Uses radio buttons (HASHAR)
 654          * @param $opts FormOptions
 655          * @return String
 656          */
 657         protected function namespaceFilterForm( FormOptions $opts ) {
 658                 $nsSelect = Html::namespaceSelector(
 659                         array( 'selected' => $opts['namespace'], 'all' => '' ),
 660                         array( 'name' => 'namespace', 'id' => 'namespace' )
 661                 );
 662                 $nsLabel = Xml::label( wfMsg( 'namespace' ), 'namespace' );
 663                 $invert = Xml::checkLabel(
 664                         wfMsg( 'invert' ), 'invert', 'nsinvert',
 665                         $opts['invert'],
 666                         array( 'title' => wfMsg( 'tooltip-invert' ) )
 667                 );
 668                 $associated = Xml::checkLabel(
 669                         wfMsg( 'namespace_association' ), 'associated', 'nsassociated',
 670                         $opts['associated'],
 671                         array( 'title' => wfMsg( 'tooltip-namespace_association' ) )
 672                 );
 673                 return array( $nsLabel, "$nsSelect $invert $associated" );
 674         }
 675
 676         /**
 677          * Create a input to filter changes by categories
 678          *
 679          * @param $opts FormOptions
 680          * @return Array
 681          */
 682         protected function categoryFilterForm( FormOptions $opts ) {
 683                 list( $label, $input ) = Xml::inputLabelSep( wfMsg( 'rc_categories' ),
 684                         'categories', 'mw-categories', false, $opts['categories'] );
 685
 686                 $input .= ' ' . Xml::checkLabel( wfMsg( 'rc_categories_any' ),
 687                         'categories_any', 'mw-categories_any', $opts['categories_any'] );
 688
 689                 return array( $label, $input );
 690         }
 691
 692         /**
 693          * Filter $rows by categories set in $opts
 694          *
 695          * @param $rows Array of database rows
 696          * @param $opts FormOptions
 697          */
 698         function filterByCategories( &$rows, FormOptions $opts ) {
 699                 $categories = array_map( 'trim', explode( '|' , $opts['categories'] ) );
 700
 701                 if( !count( $categories ) ) {
 702                         return;
 703                 }
 704
 705                 # Filter categories
 706                 $cats = array();
 707                 foreach( $categories as $cat ) {
 708                         $cat = trim( $cat );
 709                         if( $cat == '' ) {
 710                                 continue;
 711                         }
 712                         $cats[] = $cat;
 713                 }
 714
 715                 # Filter articles
 716                 $articles = array();
 717                 $a2r = array();
 718                 $rowsarr = array();
 719                 foreach( $rows as $k => $r ) {
 720                         $nt = Title::makeTitle( $r->rc_namespace, $r->rc_title );
 721                         $id = $nt->getArticleID();
 722                         if( $id == 0 ) {
 723                                 continue; # Page might have been deleted...
 724                         }
 725                         if( !in_array( $id, $articles ) ) {
 726                                 $articles[] = $id;
 727                         }
 728                         if( !isset( $a2r[$id] ) ) {
 729                                 $a2r[$id] = array();
 730                         }
 731                         $a2r[$id][] = $k;
 732                         $rowsarr[$k] = $r;
 733                 }
 734
 735                 # Shortcut?
 736                 if( !count( $articles ) || !count( $cats ) ) {
 737                         return;
 738                 }
 739
 740                 # Look up
 741                 $c = new Categoryfinder;
 742                 $c->seed( $articles, $cats, $opts['categories_any'] ? 'OR' : 'AND' );
 743                 $match = $c->run();
 744
 745                 # Filter
 746                 $newrows = array();
 747                 foreach( $match as $id ) {
 748                         foreach( $a2r[$id] as $rev ) {
 749                                 $k = $rev;
 750                                 $newrows[$k] = $rowsarr[$k];
 751                         }
 752                 }
 753                 $rows = $newrows;
 754         }
 755
 756         /**
 757          * Makes change an option link which carries all the other options
 758          *
 759          * @param $title Title
 760          * @param $override Array: options to override
 761          * @param $options Array: current options
 762          * @param $active Boolean: whether to show the link in bold
 763          */
 764         function makeOptionsLink( $title, $override, $options, $active = false ) {
 765                 $params = $override + $options;
 766                 $text = htmlspecialchars( $title );
 767                 if ( $active ) {
 768                         $text = '<strong>' . $text . '</strong>';
 769                 }
 770                 return Linker::linkKnown( $this->getTitle(), $text, array(), $params );
 771         }
 772
 773         /**
 774          * Creates the options panel.
 775          *
 776          * @param $defaults Array
 777          * @param $nondefaults Array
 778          */
 779         function optionsPanel( $defaults, $nondefaults ) {
 780                 global $wgRCLinkLimits, $wgRCLinkDays;
 781
 782                 $options = $nondefaults + $defaults;
 783
 784                 $note = '';
 785                 if( !wfEmptyMsg( 'rclegend' ) ) {
 786                         $note .= '<div class="mw-rclegend">' .
 787                                 wfMsgExt( 'rclegend', array( 'parseinline' ) ) . "</div>\n";
 788                 }
 789                 if( $options['from'] ) {
 790                         $note .= wfMsgExt( 'rcnotefrom', array( 'parseinline' ),
 791                                 $this->getLanguage()->formatNum( $options['limit'] ),
 792                                 $this->getLanguage()->timeanddate( $options['from'], true ),
 793                                 $this->getLanguage()->date( $options['from'], true ),
 794                                 $this->getLanguage()->time( $options['from'], true ) ) . '<br />';
 795                 }
 796
 797                 # Sort data for display and make sure it's unique after we've added user data.
 798                 $wgRCLinkLimits[] = $options['limit'];
 799                 $wgRCLinkDays[] = $options['days'];
 800                 sort( $wgRCLinkLimits );
 801                 sort( $wgRCLinkDays );
 802                 $wgRCLinkLimits = array_unique( $wgRCLinkLimits );
 803                 $wgRCLinkDays = array_unique( $wgRCLinkDays );
 804
 805                 // limit links
 806                 foreach( $wgRCLinkLimits as $value ) {
 807                         $cl[] = $this->makeOptionsLink( $this->getLanguage()->formatNum( $value ),
 808                                 array( 'limit' => $value ), $nondefaults, $value == $options['limit'] );
 809                 }
 810                 $cl = $this->getLanguage()->pipeList( $cl );
 811
 812                 // day links, reset 'from' to none
 813                 foreach( $wgRCLinkDays as $value ) {
 814                         $dl[] = $this->makeOptionsLink( $this->getLanguage()->formatNum( $value ),
 815                                 array( 'days' => $value, 'from' => '' ), $nondefaults, $value == $options['days'] );
 816                 }
 817                 $dl = $this->getLanguage()->pipeList( $dl );
 818
 819
 820                 // show/hide links
 821                 $showhide = array( wfMsg( 'show' ), wfMsg( 'hide' ) );
 822                 $filters = array(
 823                         'hideminor'     => 'rcshowhideminor',
 824                         'hidebots'      => 'rcshowhidebots',
 825                         'hideanons'     => 'rcshowhideanons',
 826                         'hideliu'       => 'rcshowhideliu',
 827                         'hidepatrolled' => 'rcshowhidepatr',
 828                         'hidemyself'    => 'rcshowhidemine'
 829                 );
 830                 foreach ( $this->getCustomFilters() as $key => $params ) {
 831                         $filters[$key] = $params['msg'];
 832                 }
 833                 // Disable some if needed
 834                 if ( !$this->getUser()->useRCPatrol() ) {
 835                         unset( $filters['hidepatrolled'] );
 836                 }
 837
 838                 $links = array();
 839                 foreach ( $filters as $key => $msg ) {
 840                         $link = $this->makeOptionsLink( $showhide[1 - $options[$key]],
 841                                 array( $key => 1-$options[$key] ), $nondefaults );
 842                         $links[] = wfMsgHtml( $msg, $link );
 843                 }
 844
 845                 // show from this onward link
 846                 $timestamp = wfTimestampNow();
 847                 $now = $this->getLanguage()->timeanddate( $timestamp, true );
 848                 $tl = $this->makeOptionsLink(
 849                         $now, array( 'from' => $timestamp ), $nondefaults
 850                 );
 851
 852                 $rclinks = wfMsgExt( 'rclinks', array( 'parseinline', 'replaceafter' ),
 853                         $cl, $dl, $this->getLanguage()->pipeList( $links ) );
 854                 $rclistfrom = wfMsgExt( 'rclistfrom', array( 'parseinline', 'replaceafter' ), $tl );
 855                 return "{$note}$rclinks<br />$rclistfrom";
 856         }
 857
 858         /**
 859          * add javascript specific to the [[Special:RecentChanges]] page
 860          */
 861         function addRecentChangesJS() {
 862                 $this->getOutput()->addModules( array(
 863                         'mediawiki.special.recentchanges',
 864                 ) );
 865         }
 866 }