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                 $opts->add( 'tagfilterdropdown', '' );
  64                 return $opts;
  65         }
  66
  67         /**
  68          * Create a FormOptions object with options as specified by the user
  69          *
  70          * @param $parameters array
  71          *
  72          * @return FormOptions
  73          */
  74         public function setup( $parameters ) {
  75                 $opts = $this->getDefaultOptions();
  76
  77                 foreach( $this->getCustomFilters() as $key => $params ) {
  78                         $opts->add( $key, $params['default'] );
  79                 }
  80
  81                 $opts->fetchValuesFromRequest( $this->getRequest() );
  82
  83                 // Give precedence to subpage syntax
  84                 if( $parameters !== null ) {
  85                         $this->parseParameters( $parameters, $opts );
  86                 }
  87
  88                 $opts->validateIntBounds( 'limit', 0, 5000 );
  89                 return $opts;
  90         }
  91
  92         /**
  93          * Get custom show/hide filters
  94          *
  95          * @return Array Map of filter URL param names to properties (msg/default)
  96          */
  97         protected function getCustomFilters() {
  98                 if ( $this->customFilters === null ) {
  99                         $this->customFilters = array();
 100                         wfRunHooks( 'SpecialRecentChangesFilters', array( $this, &$this->customFilters ) );
 101                 }
 102                 return $this->customFilters;
 103         }
 104
 105         /**
 106          * Create a FormOptions object specific for feed requests and return it
 107          *
 108          * @return FormOptions
 109          */
 110         public function feedSetup() {
 111                 global $wgFeedLimit;
 112                 $opts = $this->getDefaultOptions();
 113                 # Feed is cached on limit,hideminor,namespace; other params would randomly not work
 114                 $opts->fetchValuesFromRequest( $this->getRequest(), array( 'limit', 'hideminor', 'namespace' ) );
 115                 $opts->validateIntBounds( 'limit', 0, $wgFeedLimit );
 116                 return $opts;
 117         }
 118
 119         /**
 120          * Get the current FormOptions for this request
 121          */
 122         public function getOptions() {
 123                 if ( $this->rcOptions === null ) {
 124                         if ( $this->including() ) {
 125                                 $isFeed = false;
 126                         } else {
 127                                 $isFeed = (bool)$this->getRequest()->getVal( 'feed' );
 128                         }
 129                         $this->rcOptions = $isFeed ? $this->feedSetup() : $this->setup( $this->rcSubpage );
 130                 }
 131                 return $this->rcOptions;
 132         }
 133
 134
 135         /**
 136          * Main execution point
 137          *
 138          * @param $subpage String
 139          */
 140         public function execute( $subpage ) {
 141                 $this->rcSubpage = $subpage;
 142                 $feedFormat = $this->including() ? null : $this->getRequest()->getVal( 'feed' );
 143
 144                 # 10 seconds server-side caching max
 145                 $this->getOutput()->setSquidMaxage( 10 );
 146                 # Check if the client has a cached version
 147                 $lastmod = $this->checkLastModified( $feedFormat );
 148                 if( $lastmod === false ) {
 149                         return;
 150                 }
 151
 152                 $opts = $this->getOptions();
 153                 $this->setHeaders();
 154                 $this->outputHeader();
 155                 $this->addRecentChangesJS();
 156
 157                 // Fetch results, prepare a batch link existence check query
 158                 $conds = $this->buildMainQueryConds( $opts );
 159                 $rows = $this->doMainQuery( $conds, $opts );
 160                 if( $rows === false ){
 161                         if( !$this->including() ) {
 162                                 $this->doHeader( $opts );
 163                         }
 164                         return;
 165                 }
 166
 167                 if( !$feedFormat ) {
 168                         $batch = new LinkBatch;
 169                         foreach( $rows as $row ) {
 170                                 $batch->add( NS_USER, $row->rc_user_text );
 171                                 $batch->add( NS_USER_TALK, $row->rc_user_text );
 172                                 $batch->add( $row->rc_namespace, $row->rc_title );
 173                         }
 174                         $batch->execute();
 175                 }
 176                 if( $feedFormat ) {
 177                         list( $changesFeed, $formatter ) = $this->getFeedObject( $feedFormat );
 178                         $changesFeed->execute( $formatter, $rows, $lastmod, $opts );
 179                 } else {
 180                         $this->webOutput( $rows, $opts );
 181                 }
 182
 183                 $rows->free();
 184         }
 185
 186         /**
 187          * Return an array with a ChangesFeed object and ChannelFeed object
 188          *
 189          * @return Array
 190          */
 191         public function getFeedObject( $feedFormat ){
 192                 $changesFeed = new ChangesFeed( $feedFormat, 'rcfeed' );
 193                 $formatter = $changesFeed->getFeedObject(
 194                         wfMsgForContent( 'recentchanges' ),
 195                         wfMsgForContent( 'recentchanges-feed-description' ),
 196                         $this->getTitle()->getFullURL()
 197                 );
 198                 return array( $changesFeed, $formatter );
 199         }
 200
 201         /**
 202          * Process $par and put options found if $opts
 203          * Mainly used when including the page
 204          *
 205          * @param $par String
 206          * @param $opts FormOptions
 207          */
 208         public function parseParameters( $par, FormOptions $opts ) {
 209                 $bits = preg_split( '/\s*,\s*/', trim( $par ) );
 210                 foreach( $bits as $bit ) {
 211                         if( 'hidebots' === $bit ) {
 212                                 $opts['hidebots'] = true;
 213                         }
 214                         if( 'bots' === $bit ) {
 215                                 $opts['hidebots'] = false;
 216                         }
 217                         if( 'hideminor' === $bit ) {
 218                                 $opts['hideminor'] = true;
 219                         }
 220                         if( 'minor' === $bit ) {
 221                                 $opts['hideminor'] = false;
 222                         }
 223                         if( 'hideliu' === $bit ) {
 224                                 $opts['hideliu'] = true;
 225                         }
 226                         if( 'hidepatrolled' === $bit ) {
 227                                 $opts['hidepatrolled'] = true;
 228                         }
 229                         if( 'hideanons' === $bit ) {
 230                                 $opts['hideanons'] = true;
 231                         }
 232                         if( 'hidemyself' === $bit ) {
 233                                 $opts['hidemyself'] = true;
 234                         }
 235
 236                         if( is_numeric( $bit ) ) {
 237                                 $opts['limit'] =  $bit;
 238                         }
 239
 240                         $m = array();
 241                         if( preg_match( '/^limit=(\d+)$/', $bit, $m ) ) {
 242                                 $opts['limit'] = $m[1];
 243                         }
 244                         if( preg_match( '/^days=(\d+)$/', $bit, $m ) ) {
 245                                 $opts['days'] = $m[1];
 246                         }
 247                         if( preg_match( '/^namespace=(\d+)$/', $bit, $m ) ) {
 248                                 $opts['namespace'] = $m[1];
 249                         }
 250                 }
 251         }
 252
 253         /**
 254          * Get last modified date, for client caching
 255          * Don't use this if we are using the patrol feature, patrol changes don't
 256          * update the timestamp
 257          *
 258          * @param $feedFormat String
 259          * @return String or false
 260          */
 261         public function checkLastModified( $feedFormat ) {
 262                 $dbr = wfGetDB( DB_SLAVE );
 263                 $lastmod = $dbr->selectField( 'recentchanges', 'MAX(rc_timestamp)', false, __METHOD__ );
 264                 if( $feedFormat || !$this->getUser()->useRCPatrol() ) {
 265                         if( $lastmod && $this->getOutput()->checkLastModified( $lastmod ) ) {
 266                                 # Client cache fresh and headers sent, nothing more to do.
 267                                 return false;
 268                         }
 269                 }
 270                 return $lastmod;
 271         }
 272
 273         /**
 274          * Return an array of conditions depending of options set in $opts
 275          *
 276          * @param $opts FormOptions
 277          * @return array
 278          */
 279         public function buildMainQueryConds( FormOptions $opts ) {
 280                 $dbr = wfGetDB( DB_SLAVE );
 281                 $conds = array();
 282
 283                 # It makes no sense to hide both anons and logged-in users
 284                 # Where this occurs, force anons to be shown
 285                 $forcebot = false;
 286                 if( $opts['hideanons'] && $opts['hideliu'] ){
 287                         # Check if the user wants to show bots only
 288                         if( $opts['hidebots'] ){
 289                                 $opts['hideanons'] = false;
 290                         } else {
 291                                 $forcebot = true;
 292                                 $opts['hidebots'] = false;
 293                         }
 294                 }
 295
 296                 // Calculate cutoff
 297                 $cutoff_unixtime = time() - ( $opts['days'] * 86400 );
 298                 $cutoff_unixtime = $cutoff_unixtime - ($cutoff_unixtime % 86400);
 299                 $cutoff = $dbr->timestamp( $cutoff_unixtime );
 300
 301                 $fromValid = preg_match('/^[0-9]{14}$/', $opts['from']);
 302                 if( $fromValid && $opts['from'] > wfTimestamp(TS_MW,$cutoff) ) {
 303                         $cutoff = $dbr->timestamp($opts['from']);
 304                 } else {
 305                         $opts->reset( 'from' );
 306                 }
 307
 308                 $conds[] = 'rc_timestamp >= ' . $dbr->addQuotes( $cutoff );
 309
 310                 $hidePatrol = $this->getUser()->useRCPatrol() && $opts['hidepatrolled'];
 311                 $hideLoggedInUsers = $opts['hideliu'] && !$forcebot;
 312                 $hideAnonymousUsers = $opts['hideanons'] && !$forcebot;
 313
 314                 if( $opts['hideminor'] ) {
 315                         $conds['rc_minor'] = 0;
 316                 }
 317                 if( $opts['hidebots'] ) {
 318                         $conds['rc_bot'] = 0;
 319                 }
 320                 if( $hidePatrol ) {
 321                         $conds['rc_patrolled'] = 0;
 322                 }
 323                 if( $forcebot ) {
 324                         $conds['rc_bot'] = 1;
 325                 }
 326                 if( $hideLoggedInUsers ) {
 327                         $conds[] = 'rc_user = 0';
 328                 }
 329                 if( $hideAnonymousUsers ) {
 330                         $conds[] = 'rc_user != 0';
 331                 }
 332
 333                 if( $opts['hidemyself'] ) {
 334                         if( $this->getUser()->getId() ) {
 335                                 $conds[] = 'rc_user != ' . $dbr->addQuotes( $this->getUser()->getId() );
 336                         } else {
 337                                 $conds[] = 'rc_user_text != ' . $dbr->addQuotes( $this->getUser()->getName() );
 338                         }
 339                 }
 340
 341                 # Namespace filtering
 342                 if( $opts['namespace'] !== '' ) {
 343                         $selectedNS = $dbr->addQuotes( $opts['namespace'] );
 344                         $operator = $opts['invert'] ? '!='  : '=';
 345                         $boolean  = $opts['invert'] ? 'AND' : 'OR';
 346
 347                         # namespace association (bug 2429)
 348                         if( !$opts['associated'] ) {
 349                                 $condition = "rc_namespace $operator $selectedNS";
 350                         } else {
 351                                 # Also add the associated namespace
 352                                 $associatedNS = $dbr->addQuotes(
 353                                         MWNamespace::getAssociated( $opts['namespace'] )
 354                                 );
 355                                 $condition = "(rc_namespace $operator $selectedNS "
 356                                                    . $boolean
 357                                                    . " rc_namespace $operator $associatedNS)";
 358                         }
 359
 360                         $conds[] = $condition;
 361                 }
 362                 return $conds;
 363         }
 364
 365         /**
 366          * Process the query
 367          *
 368          * @param $conds Array
 369          * @param $opts FormOptions
 370          * @return database result or false (for Recentchangeslinked only)
 371          */
 372         public function doMainQuery( $conds, $opts ) {
 373                 $tables = array( 'recentchanges' );
 374                 $join_conds = array();
 375                 $query_options = array(
 376                         'USE INDEX' => array( 'recentchanges' => 'rc_timestamp' )
 377                 );
 378
 379                 $uid = $this->getUser()->getId();
 380                 $dbr = wfGetDB( DB_SLAVE );
 381                 $limit = $opts['limit'];
 382                 $namespace = $opts['namespace'];
 383                 $invert = $opts['invert'];
 384                 $associated = $opts['associated'];
 385
 386                 $fields = array( $dbr->tableName( 'recentchanges' ) . '.*' ); // all rc columns
 387                 // JOIN on watchlist for users
 388                 if ( $uid ) {
 389                         $tables[] = 'watchlist';
 390                         $fields[] = 'wl_user';
 391                         $fields[] = 'wl_notificationtimestamp';
 392                         $join_conds['watchlist'] = array('LEFT JOIN',
 393                                 "wl_user={$uid} AND wl_title=rc_title AND wl_namespace=rc_namespace");
 394                 }
 395                 if ( $this->getUser()->isAllowed( 'rollback' ) ) {
 396                         $tables[] = 'page';
 397                         $fields[] = 'page_latest';
 398                         $join_conds['page'] = array('LEFT JOIN', 'rc_cur_id=page_id');
 399                 }
 400                 if ( !$this->including() ) {
 401                         // Tag stuff.
 402                         // Doesn't work when transcluding. See bug 23293
 403                         ChangeTags::modifyDisplayQuery(
 404                                 $tables, $fields, $conds, $join_conds, $query_options
 405                         );
 406                 }
 407
 408                 if ( !wfRunHooks( 'SpecialRecentChangesQuery',
 409                         array( &$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', 'tagfilterdropdown'
 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::buildTagFilterWithDropdown( 'tag-filter-dropdown-list',
 620                         $opts['tagfilter'], $opts['tagfilterdropdown'] );
 621                 if ( count( $tagFilter ) ) {
 622                         $extraOpts['tagfilter'] = implode( '&#160;', $tagFilter );
 623                 }
 624
 625                 wfRunHooks( 'SpecialRecentChangesPanel', array( &$extraOpts, $opts ) );
 626                 return $extraOpts;
 627         }
 628
 629         /**
 630          * Send the text to be displayed above the options
 631          *
 632          * @param $opts FormOptions
 633          */
 634         function setTopText( FormOptions $opts ) {
 635                 global $wgContLang;
 636                 $this->getOutput()->addWikiText(
 637                 Html::rawElement( 'p',
 638                         array( 'lang' => $wgContLang->getCode(), 'dir' => $wgContLang->getDir() ),
 639                         "\n" . wfMsgForContentNoTrans( 'recentchangestext' ) . "\n"
 640                 ), false );
 641         }
 642
 643         /**
 644          * Send the text to be displayed after the options, for use in
 645          * Recentchangeslinked
 646          *
 647          * @param $opts FormOptions
 648          */
 649         function setBottomText( FormOptions $opts ) {}
 650
 651         /**
 652          * Creates the choose namespace selection
 653          *
 654          * @todo Uses radio buttons (HASHAR)
 655          * @param $opts FormOptions
 656          * @return String
 657          */
 658         protected function namespaceFilterForm( FormOptions $opts ) {
 659                 $nsSelect = Xml::namespaceSelector( $opts['namespace'], '' );
 660                 $nsLabel = Xml::label( wfMsg( 'namespace' ), 'namespace' );
 661                 $invert = Xml::checkLabel(
 662                         wfMsg( 'invert' ), 'invert', 'nsinvert',
 663                         $opts['invert'],
 664                         array( 'title' => wfMsg( 'tooltip-invert' ) )
 665                 );
 666                 $associated = Xml::checkLabel(
 667                         wfMsg( 'namespace_association' ), 'associated', 'nsassociated',
 668                         $opts['associated'],
 669                         array( 'title' => wfMsg( 'tooltip-namespace_association' ) )
 670                 );
 671                 return array( $nsLabel, "$nsSelect $invert $associated" );
 672         }
 673
 674         /**
 675          * Create a input to filter changes by categories
 676          *
 677          * @param $opts FormOptions
 678          * @return Array
 679          */
 680         protected function categoryFilterForm( FormOptions $opts ) {
 681                 list( $label, $input ) = Xml::inputLabelSep( wfMsg( 'rc_categories' ),
 682                         'categories', 'mw-categories', false, $opts['categories'] );
 683
 684                 $input .= ' ' . Xml::checkLabel( wfMsg( 'rc_categories_any' ),
 685                         'categories_any', 'mw-categories_any', $opts['categories_any'] );
 686
 687                 return array( $label, $input );
 688         }
 689
 690         /**
 691          * Filter $rows by categories set in $opts
 692          *
 693          * @param $rows Array of database rows
 694          * @param $opts FormOptions
 695          */
 696         function filterByCategories( &$rows, FormOptions $opts ) {
 697                 $categories = array_map( 'trim', explode( '|' , $opts['categories'] ) );
 698
 699                 if( !count( $categories ) ) {
 700                         return;
 701                 }
 702
 703                 # Filter categories
 704                 $cats = array();
 705                 foreach( $categories as $cat ) {
 706                         $cat = trim( $cat );
 707                         if( $cat == '' ) {
 708                                 continue;
 709                         }
 710                         $cats[] = $cat;
 711                 }
 712
 713                 # Filter articles
 714                 $articles = array();
 715                 $a2r = array();
 716                 $rowsarr = array();
 717                 foreach( $rows as $k => $r ) {
 718                         $nt = Title::makeTitle( $r->rc_namespace, $r->rc_title );
 719                         $id = $nt->getArticleID();
 720                         if( $id == 0 ) {
 721                                 continue; # Page might have been deleted...
 722                         }
 723                         if( !in_array( $id, $articles ) ) {
 724                                 $articles[] = $id;
 725                         }
 726                         if( !isset( $a2r[$id] ) ) {
 727                                 $a2r[$id] = array();
 728                         }
 729                         $a2r[$id][] = $k;
 730                         $rowsarr[$k] = $r;
 731                 }
 732
 733                 # Shortcut?
 734                 if( !count( $articles ) || !count( $cats ) ) {
 735                         return;
 736                 }
 737
 738                 # Look up
 739                 $c = new Categoryfinder;
 740                 $c->seed( $articles, $cats, $opts['categories_any'] ? 'OR' : 'AND' );
 741                 $match = $c->run();
 742
 743                 # Filter
 744                 $newrows = array();
 745                 foreach( $match as $id ) {
 746                         foreach( $a2r[$id] as $rev ) {
 747                                 $k = $rev;
 748                                 $newrows[$k] = $rowsarr[$k];
 749                         }
 750                 }
 751                 $rows = $newrows;
 752         }
 753
 754         /**
 755          * Makes change an option link which carries all the other options
 756          *
 757          * @param $title Title
 758          * @param $override Array: options to override
 759          * @param $options Array: current options
 760          * @param $active Boolean: whether to show the link in bold
 761          */
 762         function makeOptionsLink( $title, $override, $options, $active = false ) {
 763                 $params = $override + $options;
 764                 $text = htmlspecialchars( $title );
 765                 if ( $active ) {
 766                         $text = '<strong>' . $text . '</strong>';
 767                 }
 768                 return Linker::linkKnown( $this->getTitle(), $text, array(), $params );
 769         }
 770
 771         /**
 772          * Creates the options panel.
 773          *
 774          * @param $defaults Array
 775          * @param $nondefaults Array
 776          */
 777         function optionsPanel( $defaults, $nondefaults ) {
 778                 global $wgRCLinkLimits, $wgRCLinkDays;
 779
 780                 $options = $nondefaults + $defaults;
 781
 782                 $note = '';
 783                 if( !wfEmptyMsg( 'rclegend' ) ) {
 784                         $note .= '<div class="mw-rclegend">' .
 785                                 wfMsgExt( 'rclegend', array( 'parseinline' ) ) . "</div>\n";
 786                 }
 787                 if( $options['from'] ) {
 788                         $note .= wfMsgExt( 'rcnotefrom', array( 'parseinline' ),
 789                                 $this->getLanguage()->formatNum( $options['limit'] ),
 790                                 $this->getLanguage()->timeanddate( $options['from'], true ),
 791                                 $this->getLanguage()->date( $options['from'], true ),
 792                                 $this->getLanguage()->time( $options['from'], true ) ) . '<br />';
 793                 }
 794
 795                 # Sort data for display and make sure it's unique after we've added user data.
 796                 $wgRCLinkLimits[] = $options['limit'];
 797                 $wgRCLinkDays[] = $options['days'];
 798                 sort( $wgRCLinkLimits );
 799                 sort( $wgRCLinkDays );
 800                 $wgRCLinkLimits = array_unique( $wgRCLinkLimits );
 801                 $wgRCLinkDays = array_unique( $wgRCLinkDays );
 802
 803                 // limit links
 804                 foreach( $wgRCLinkLimits as $value ) {
 805                         $cl[] = $this->makeOptionsLink( $this->getLanguage()->formatNum( $value ),
 806                                 array( 'limit' => $value ), $nondefaults, $value == $options['limit'] );
 807                 }
 808                 $cl = $this->getLanguage()->pipeList( $cl );
 809
 810                 // day links, reset 'from' to none
 811                 foreach( $wgRCLinkDays as $value ) {
 812                         $dl[] = $this->makeOptionsLink( $this->getLanguage()->formatNum( $value ),
 813                                 array( 'days' => $value, 'from' => '' ), $nondefaults, $value == $options['days'] );
 814                 }
 815                 $dl = $this->getLanguage()->pipeList( $dl );
 816
 817
 818                 // show/hide links
 819                 $showhide = array( wfMsg( 'show' ), wfMsg( 'hide' ) );
 820                 $filters = array(
 821                         'hideminor'     => 'rcshowhideminor',
 822                         'hidebots'      => 'rcshowhidebots',
 823                         'hideanons'     => 'rcshowhideanons',
 824                         'hideliu'       => 'rcshowhideliu',
 825                         'hidepatrolled' => 'rcshowhidepatr',
 826                         'hidemyself'    => 'rcshowhidemine'
 827                 );
 828                 foreach ( $this->getCustomFilters() as $key => $params ) {
 829                         $filters[$key] = $params['msg'];
 830                 }
 831                 // Disable some if needed
 832                 if ( !$this->getUser()->useRCPatrol() ) {
 833                         unset( $filters['hidepatrolled'] );
 834                 }
 835
 836                 $links = array();
 837                 foreach ( $filters as $key => $msg ) {
 838                         $link = $this->makeOptionsLink( $showhide[1 - $options[$key]],
 839                                 array( $key => 1-$options[$key] ), $nondefaults );
 840                         $links[] = wfMsgHtml( $msg, $link );
 841                 }
 842
 843                 // show from this onward link
 844                 $timestamp = wfTimestampNow();
 845                 $now = $this->getLanguage()->timeanddate( $timestamp, true );
 846                 $tl = $this->makeOptionsLink(
 847                         $now, array( 'from' => $timestamp ), $nondefaults
 848                 );
 849
 850                 $rclinks = wfMsgExt( 'rclinks', array( 'parseinline', 'replaceafter' ),
 851                         $cl, $dl, $this->getLanguage()->pipeList( $links ) );
 852                 $rclistfrom = wfMsgExt( 'rclistfrom', array( 'parseinline', 'replaceafter' ), $tl );
 853                 return "{$note}$rclinks<br />$rclistfrom";
 854         }
 855
 856         /**
 857          * add javascript specific to the [[Special:RecentChanges]] page
 858          */
 859         function addRecentChangesJS() {
 860                 $this->getOutput()->addModules( array(
 861                         'mediawiki.special.recentchanges',
 862                 ) );
 863         }
 864 }