includes/api/ApiQueryRecentChanges.php

   1 <?php
   2
   3 /**
   4  * Created on Oct 19, 2006
   5  *
   6  * API for MediaWiki 1.8+
   7  *
   8  * Copyright © 2006 Yuri Astrakhan <Firstname><Lastname>@gmail.com
   9  *
  10  * This program is free software; you can redistribute it and/or modify
  11  * it under the terms of the GNU General Public License as published by
  12  * the Free Software Foundation; either version 2 of the License, or
  13  * (at your option) any later version.
  14  *
  15  * This program is distributed in the hope that it will be useful,
  16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  18  * GNU General Public License for more details.
  19  *
  20  * You should have received a copy of the GNU General Public License along
  21  * with this program; if not, write to the Free Software Foundation, Inc.,
  22  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  23  * http://www.gnu.org/copyleft/gpl.html
  24  */
  25
  26 if ( !defined( 'MEDIAWIKI' ) ) {
  27         // Eclipse helper - will be ignored in production
  28         require_once( 'ApiQueryBase.php' );
  29 }
  30
  31 /**
  32  * A query action to enumerate the recent changes that were done to the wiki.
  33  * Various filters are supported.
  34  *
  35  * @ingroup API
  36  */
  37 class ApiQueryRecentChanges extends ApiQueryBase {
  38
  39         public function __construct( $query, $moduleName ) {
  40                 parent::__construct( $query, $moduleName, 'rc' );
  41         }
  42
  43         private $fld_comment = false, $fld_parsedcomment = false, $fld_user = false, $fld_flags = false,
  44                         $fld_timestamp = false, $fld_title = false, $fld_ids = false,
  45                         $fld_sizes = false;
  46         /**
  47          * Get an array mapping token names to their handler functions.
  48          * The prototype for a token function is func($pageid, $title, $rc)
  49          * it should return a token or false (permission denied)
  50          * @return array(tokenname => function)
  51          */
  52         protected function getTokenFunctions() {
  53                 // Don't call the hooks twice
  54                 if ( isset( $this->tokenFunctions ) ) {
  55                         return $this->tokenFunctions;
  56                 }
  57
  58                 // If we're in JSON callback mode, no tokens can be obtained
  59                 if ( !is_null( $this->getMain()->getRequest()->getVal( 'callback' ) ) ) {
  60                         return array();
  61                 }
  62
  63                 $this->tokenFunctions = array(
  64                         'patrol' => array( 'ApiQueryRecentChanges', 'getPatrolToken' )
  65                 );
  66                 wfRunHooks( 'APIQueryRecentChangesTokens', array( &$this->tokenFunctions ) );
  67                 return $this->tokenFunctions;
  68         }
  69
  70         public static function getPatrolToken( $pageid, $title, $rc ) {
  71                 global $wgUser;
  72                 if ( !$wgUser->useRCPatrol() && ( !$wgUser->useNPPatrol() ||
  73                                 $rc->getAttribute( 'rc_type' ) != RC_NEW ) )
  74                 {
  75                         return false;
  76                 }
  77
  78                 // The patrol token is always the same, let's exploit that
  79                 static $cachedPatrolToken = null;
  80                 if ( !is_null( $cachedPatrolToken ) ) {
  81                         return $cachedPatrolToken;
  82                 }
  83
  84                 $cachedPatrolToken = $wgUser->editToken();
  85                 return $cachedPatrolToken;
  86         }
  87
  88         /**
  89          * Sets internal state to include the desired properties in the output.
  90          * @param $prop associative array of properties, only keys are used here
  91          */
  92         public function initProperties( $prop ) {
  93                 $this->fld_comment = isset( $prop['comment'] );
  94                 $this->fld_parsedcomment = isset( $prop['parsedcomment'] );
  95                 $this->fld_user = isset( $prop['user'] );
  96                 $this->fld_flags = isset( $prop['flags'] );
  97                 $this->fld_timestamp = isset( $prop['timestamp'] );
  98                 $this->fld_title = isset( $prop['title'] );
  99                 $this->fld_ids = isset( $prop['ids'] );
 100                 $this->fld_sizes = isset( $prop['sizes'] );
 101                 $this->fld_redirect = isset( $prop['redirect'] );
 102                 $this->fld_patrolled = isset( $prop['patrolled'] );
 103                 $this->fld_loginfo = isset( $prop['loginfo'] );
 104                 $this->fld_tags = isset( $prop['tags'] );
 105         }
 106
 107         /**
 108          * Generates and outputs the result of this query based upon the provided parameters.
 109          */
 110         public function execute() {
 111                 /* Get the parameters of the request. */
 112                 $params = $this->extractRequestParams();
 113
 114                 /* Build our basic query. Namely, something along the lines of:
 115                  * SELECT * FROM recentchanges WHERE rc_timestamp > $start
 116                  *              AND rc_timestamp < $end AND rc_namespace = $namespace
 117                  *              AND rc_deleted = '0'
 118                  */
 119                 $db = $this->getDB();
 120                 $this->addTables( 'recentchanges' );
 121                 $index = array( 'recentchanges' => 'rc_timestamp' ); // May change
 122                 $this->addWhereRange( 'rc_timestamp', $params['dir'], $params['start'], $params['end'] );
 123                 $this->addWhereFld( 'rc_namespace', $params['namespace'] );
 124                 $this->addWhereFld( 'rc_deleted', 0 );
 125
 126                 if ( !is_null( $params['type'] ) ) {
 127                         $this->addWhereFld( 'rc_type', $this->parseRCType( $params['type'] ) );
 128                 }
 129
 130                 if ( !is_null( $params['show'] ) ) {
 131                         $show = array_flip( $params['show'] );
 132
 133                         /* Check for conflicting parameters. */
 134                         if ( ( isset( $show['minor'] ) && isset( $show['!minor'] ) )
 135                                         || ( isset( $show['bot'] ) && isset( $show['!bot'] ) )
 136                                         || ( isset( $show['anon'] ) && isset( $show['!anon'] ) )
 137                                         || ( isset( $show['redirect'] ) && isset( $show['!redirect'] ) )
 138                                         || ( isset( $show['patrolled'] ) && isset( $show['!patrolled'] ) )
 139                         )
 140                         {
 141                                 $this->dieUsageMsg( array( 'show' ) );
 142                         }
 143
 144                         // Check permissions
 145                         global $wgUser;
 146                         if ( isset( $show['patrolled'] ) || isset( $show['!patrolled'] ) ) {
 147                                 $this->getMain()->setVaryCookie();
 148                                 if ( !$wgUser->useRCPatrol() && !$wgUser->useNPPatrol() ) {
 149                                         $this->dieUsage( 'You need the patrol right to request the patrolled flag', 'permissiondenied' );
 150                                 }
 151                         }
 152
 153                         /* Add additional conditions to query depending upon parameters. */
 154                         $this->addWhereIf( 'rc_minor = 0', isset( $show['!minor'] ) );
 155                         $this->addWhereIf( 'rc_minor != 0', isset( $show['minor'] ) );
 156                         $this->addWhereIf( 'rc_bot = 0', isset( $show['!bot'] ) );
 157                         $this->addWhereIf( 'rc_bot != 0', isset( $show['bot'] ) );
 158                         $this->addWhereIf( 'rc_user = 0', isset( $show['anon'] ) );
 159                         $this->addWhereIf( 'rc_user != 0', isset( $show['!anon'] ) );
 160                         $this->addWhereIf( 'rc_patrolled = 0', isset( $show['!patrolled'] ) );
 161                         $this->addWhereIf( 'rc_patrolled != 0', isset( $show['patrolled'] ) );
 162                         $this->addWhereIf( 'page_is_redirect = 1', isset( $show['redirect'] ) );
 163
 164                         // Don't throw log entries out the window here
 165                         $this->addWhereIf( 'page_is_redirect = 0 OR page_is_redirect IS NULL', isset( $show['!redirect'] ) );
 166                 }
 167
 168                 if ( !is_null( $params['user'] ) && !is_null( $param['excludeuser'] ) ) {
 169                         $this->dieUsage( 'user and excludeuser cannot be used together', 'user-excludeuser' );
 170                 }
 171
 172                 if ( !is_null( $params['user'] ) ) {
 173                         $this->addWhereFld( 'rc_user_text', $params['user'] );
 174                         $index['recentchanges'] = 'rc_user_text';
 175                 }
 176
 177                 if ( !is_null( $params['excludeuser'] ) ) {
 178                         // We don't use the rc_user_text index here because
 179                         // * it would require us to sort by rc_user_text before rc_timestamp
 180                         // * the != condition doesn't throw out too many rows anyway
 181                         $this->addWhere( 'rc_user_text != ' . $this->getDB()->addQuotes( $params['excludeuser'] ) );
 182                 }
 183
 184                 /* Add the fields we're concerned with to our query. */
 185                 $this->addFields( array(
 186                         'rc_timestamp',
 187                         'rc_namespace',
 188                         'rc_title',
 189                         'rc_cur_id',
 190                         'rc_type',
 191                         'rc_moved_to_ns',
 192                         'rc_moved_to_title'
 193                 ) );
 194
 195                 /* Determine what properties we need to display. */
 196                 if ( !is_null( $params['prop'] ) ) {
 197                         $prop = array_flip( $params['prop'] );
 198
 199                         /* Set up internal members based upon params. */
 200                         $this->initProperties( $prop );
 201
 202                         global $wgUser;
 203                         if ( $this->fld_patrolled && !$wgUser->useRCPatrol() && !$wgUser->useNPPatrol() )
 204                         {
 205                                 $this->dieUsage( 'You need the patrol right to request the patrolled flag', 'permissiondenied' );
 206                         }
 207
 208                         /* Add fields to our query if they are specified as a needed parameter. */
 209                         $this->addFieldsIf( 'rc_id', $this->fld_ids );
 210                         $this->addFieldsIf( 'rc_this_oldid', $this->fld_ids );
 211                         $this->addFieldsIf( 'rc_last_oldid', $this->fld_ids );
 212                         $this->addFieldsIf( 'rc_comment', $this->fld_comment || $this->fld_parsedcomment );
 213                         $this->addFieldsIf( 'rc_user', $this->fld_user );
 214                         $this->addFieldsIf( 'rc_user_text', $this->fld_user );
 215                         $this->addFieldsIf( 'rc_minor', $this->fld_flags );
 216                         $this->addFieldsIf( 'rc_bot', $this->fld_flags );
 217                         $this->addFieldsIf( 'rc_new', $this->fld_flags );
 218                         $this->addFieldsIf( 'rc_old_len', $this->fld_sizes );
 219                         $this->addFieldsIf( 'rc_new_len', $this->fld_sizes );
 220                         $this->addFieldsIf( 'rc_patrolled', $this->fld_patrolled );
 221                         $this->addFieldsIf( 'rc_logid', $this->fld_loginfo );
 222                         $this->addFieldsIf( 'rc_log_type', $this->fld_loginfo );
 223                         $this->addFieldsIf( 'rc_log_action', $this->fld_loginfo );
 224                         $this->addFieldsIf( 'rc_params', $this->fld_loginfo );
 225                         if ( $this->fld_redirect || isset( $show['redirect'] ) || isset( $show['!redirect'] ) )
 226                         {
 227                                 $this->addTables( 'page' );
 228                                 $this->addJoinConds( array( 'page' => array( 'LEFT JOIN', array( 'rc_namespace=page_namespace', 'rc_title=page_title' ) ) ) );
 229                                 $this->addFields( 'page_is_redirect' );
 230                         }
 231                 }
 232
 233                 if ( $this->fld_tags ) {
 234                         $this->addTables( 'tag_summary' );
 235                         $this->addJoinConds( array( 'tag_summary' => array( 'LEFT JOIN', array( 'rc_id=ts_rc_id' ) ) ) );
 236                         $this->addFields( 'ts_tags' );
 237                 }
 238
 239                 if ( !is_null( $params['tag'] ) ) {
 240                         $this->addTables( 'change_tag' );
 241                         $this->addJoinConds( array( 'change_tag' => array( 'INNER JOIN', array( 'rc_id=ct_rc_id' ) ) ) );
 242                         $this->addWhereFld( 'ct_tag' , $params['tag'] );
 243                         global $wgOldChangeTagsIndex;
 244                         $index['change_tag'] = $wgOldChangeTagsIndex ? 'ct_tag' : 'change_tag_tag_id';
 245                 }
 246
 247                 $this->token = $params['token'];
 248                 $this->addOption( 'LIMIT', $params['limit'] + 1 );
 249                 $this->addOption( 'USE INDEX', $index );
 250
 251                 $count = 0;
 252                 /* Perform the actual query. */
 253                 $db = $this->getDB();
 254                 $res = $this->select( __METHOD__ );
 255
 256                 /* Iterate through the rows, adding data extracted from them to our query result. */
 257                 foreach ( $res as $row ) {
 258                         if ( ++ $count > $params['limit'] ) {
 259                                 // We've reached the one extra which shows that there are additional pages to be had. Stop here...
 260                                 $this->setContinueEnumParameter( 'start', wfTimestamp( TS_ISO_8601, $row->rc_timestamp ) );
 261                                 break;
 262                         }
 263
 264                         /* Extract the data from a single row. */
 265                         $vals = $this->extractRowInfo( $row );
 266
 267                         /* Add that row's data to our final output. */
 268                         if ( !$vals ) {
 269                                 continue;
 270                         }
 271                         $fit = $this->getResult()->addValue( array( 'query', $this->getModuleName() ), null, $vals );
 272                         if ( !$fit ) {
 273                                 $this->setContinueEnumParameter( 'start', wfTimestamp( TS_ISO_8601, $row->rc_timestamp ) );
 274                                 break;
 275                         }
 276                 }
 277
 278                 /* Format the result */
 279                 $this->getResult()->setIndexedTagName_internal( array( 'query', $this->getModuleName() ), 'rc' );
 280         }
 281
 282         /**
 283          * Extracts from a single sql row the data needed to describe one recent change.
 284          *
 285          * @param $row The row from which to extract the data.
 286          * @return An array mapping strings (descriptors) to their respective string values.
 287          * @access public
 288          */
 289         public function extractRowInfo( $row ) {
 290                 /* If page was moved somewhere, get the title of the move target. */
 291                 $movedToTitle = false;
 292                 if ( isset( $row->rc_moved_to_title ) && $row->rc_moved_to_title !== '' )
 293                 {
 294                         $movedToTitle = Title::makeTitle( $row->rc_moved_to_ns, $row->rc_moved_to_title );
 295                 }
 296
 297                 /* Determine the title of the page that has been changed. */
 298                 $title = Title::makeTitle( $row->rc_namespace, $row->rc_title );
 299
 300                 /* Our output data. */
 301                 $vals = array();
 302
 303                 $type = intval( $row->rc_type );
 304
 305                 /* Determine what kind of change this was. */
 306                 switch ( $type ) {
 307                         case RC_EDIT:
 308                                 $vals['type'] = 'edit';
 309                                 break;
 310                         case RC_NEW:
 311                                 $vals['type'] = 'new';
 312                                 break;
 313                         case RC_MOVE:
 314                                 $vals['type'] = 'move';
 315                                 break;
 316                         case RC_LOG:
 317                                 $vals['type'] = 'log';
 318                                 break;
 319                         case RC_MOVE_OVER_REDIRECT:
 320                                 $vals['type'] = 'move over redirect';
 321                                 break;
 322                         default:
 323                                 $vals['type'] = $type;
 324                 }
 325
 326                 /* Create a new entry in the result for the title. */
 327                 if ( $this->fld_title ) {
 328                         ApiQueryBase::addTitleInfo( $vals, $title );
 329                         if ( $movedToTitle ) {
 330                                 ApiQueryBase::addTitleInfo( $vals, $movedToTitle, 'new_' );
 331                         }
 332                 }
 333
 334                 /* Add ids, such as rcid, pageid, revid, and oldid to the change's info. */
 335                 if ( $this->fld_ids ) {
 336                         $vals['rcid'] = intval( $row->rc_id );
 337                         $vals['pageid'] = intval( $row->rc_cur_id );
 338                         $vals['revid'] = intval( $row->rc_this_oldid );
 339                         $vals['old_revid'] = intval( $row->rc_last_oldid );
 340                 }
 341
 342                 /* Add user data and 'anon' flag, if use is anonymous. */
 343                 if ( $this->fld_user ) {
 344                         $vals['user'] = $row->rc_user_text;
 345                         if ( !$row->rc_user ) {
 346                                 $vals['anon'] = '';
 347                         }
 348                 }
 349
 350                 /* Add flags, such as new, minor, bot. */
 351                 if ( $this->fld_flags ) {
 352                         if ( $row->rc_bot ) {
 353                                 $vals['bot'] = '';
 354                         }
 355                         if ( $row->rc_new ) {
 356                                 $vals['new'] = '';
 357                         }
 358                         if ( $row->rc_minor ) {
 359                                 $vals['minor'] = '';
 360                         }
 361                 }
 362
 363                 /* Add sizes of each revision. (Only available on 1.10+) */
 364                 if ( $this->fld_sizes ) {
 365                         $vals['oldlen'] = intval( $row->rc_old_len );
 366                         $vals['newlen'] = intval( $row->rc_new_len );
 367                 }
 368
 369                 /* Add the timestamp. */
 370                 if ( $this->fld_timestamp ) {
 371                         $vals['timestamp'] = wfTimestamp( TS_ISO_8601, $row->rc_timestamp );
 372                 }
 373
 374                 /* Add edit summary / log summary. */
 375                 if ( $this->fld_comment && isset( $row->rc_comment ) ) {
 376                         $vals['comment'] = $row->rc_comment;
 377                 }
 378
 379                 if ( $this->fld_parsedcomment && isset( $row->rc_comment ) ) {
 380                         global $wgUser;
 381                         $this->getMain()->setVaryCookie();
 382                         $vals['parsedcomment'] = $wgUser->getSkin()->formatComment( $row->rc_comment, $title );
 383                 }
 384
 385                 if ( $this->fld_redirect ) {
 386                         if ( $row->page_is_redirect ) {
 387                                 $vals['redirect'] = '';
 388                         }
 389                 }
 390
 391                 /* Add the patrolled flag */
 392                 if ( $this->fld_patrolled && $row->rc_patrolled == 1 ) {
 393                         $vals['patrolled'] = '';
 394                 }
 395
 396                 if ( $this->fld_loginfo && $row->rc_type == RC_LOG ) {
 397                         $vals['logid'] = intval( $row->rc_logid );
 398                         $vals['logtype'] = $row->rc_log_type;
 399                         $vals['logaction'] = $row->rc_log_action;
 400                         ApiQueryLogEvents::addLogParams(
 401                                 $this->getResult(),
 402                                 $vals, $row->rc_params,
 403                                 $row->rc_log_type, $row->rc_timestamp
 404                         );
 405                 }
 406
 407                 if ( $this->fld_tags ) {
 408                         if ( $row->ts_tags ) {
 409                                 $tags = explode( ',', $row->ts_tags );
 410                                 $this->getResult()->setIndexedTagName( $tags, 'tag' );
 411                                 $vals['tags'] = $tags;
 412                         } else {
 413                                 $vals['tags'] = array();
 414                         }
 415                 }
 416
 417                 if ( !is_null( $this->token ) ) {
 418                         // Don't cache tokens
 419                         $this->getMain()->setCachePrivate();
 420
 421                         $tokenFunctions = $this->getTokenFunctions();
 422                         foreach ( $this->token as $t ) {
 423                                 $val = call_user_func( $tokenFunctions[$t], $row->rc_cur_id,
 424                                         $title, RecentChange::newFromRow( $row ) );
 425                                 if ( $val === false ) {
 426                                         $this->setWarning( "Action '$t' is not allowed for the current user" );
 427                                 } else {
 428                                         $vals[$t . 'token'] = $val;
 429                                 }
 430                         }
 431                 }
 432
 433                 return $vals;
 434         }
 435
 436         private function parseRCType( $type ) {
 437                 if ( is_array( $type ) ) {
 438                         $retval = array();
 439                         foreach ( $type as $t ) {
 440                                 $retval[] = $this->parseRCType( $t );
 441                         }
 442                         return $retval;
 443                 }
 444                 switch( $type ) {
 445                         case 'edit':
 446                                 return RC_EDIT;
 447                         case 'new':
 448                                 return RC_NEW;
 449                         case 'log':
 450                                 return RC_LOG;
 451                 }
 452         }
 453
 454         public function getAllowedParams() {
 455                 return array(
 456                         'start' => array(
 457                                 ApiBase::PARAM_TYPE => 'timestamp'
 458                         ),
 459                         'end' => array(
 460                                 ApiBase::PARAM_TYPE => 'timestamp'
 461                         ),
 462                         'dir' => array(
 463                                 ApiBase::PARAM_DFLT => 'older',
 464                                 ApiBase::PARAM_TYPE => array(
 465                                         'newer',
 466                                         'older'
 467                                 )
 468                         ),
 469                         'namespace' => array(
 470                                 ApiBase::PARAM_ISMULTI => true,
 471                                 ApiBase::PARAM_TYPE => 'namespace'
 472                         ),
 473                         'user' => array(
 474                                 ApiBase::PARAM_TYPE => 'user'
 475                         ),
 476                         'excludeuser' => array(
 477                                 ApiBase::PARAM_TYPE => 'user'
 478                         ),
 479                         'tag' => null,
 480                         'prop' => array(
 481                                 ApiBase::PARAM_ISMULTI => true,
 482                                 ApiBase::PARAM_DFLT => 'title|timestamp|ids',
 483                                 ApiBase::PARAM_TYPE => array(
 484                                         'user',
 485                                         'comment',
 486                                         'parsedcomment',
 487                                         'flags',
 488                                         'timestamp',
 489                                         'title',
 490                                         'ids',
 491                                         'sizes',
 492                                         'redirect',
 493                                         'patrolled',
 494                                         'loginfo',
 495                                         'tags'
 496                                 )
 497                         ),
 498                         'token' => array(
 499                                 ApiBase::PARAM_TYPE => array_keys( $this->getTokenFunctions() ),
 500                                 ApiBase::PARAM_ISMULTI => true
 501                         ),
 502                         'show' => array(
 503                                 ApiBase::PARAM_ISMULTI => true,
 504                                 ApiBase::PARAM_TYPE => array(
 505                                         'minor',
 506                                         '!minor',
 507                                         'bot',
 508                                         '!bot',
 509                                         'anon',
 510                                         '!anon',
 511                                         'redirect',
 512                                         '!redirect',
 513                                         'patrolled',
 514                                         '!patrolled'
 515                                 )
 516                         ),
 517                         'limit' => array(
 518                                 ApiBase::PARAM_DFLT => 10,
 519                                 ApiBase::PARAM_TYPE => 'limit',
 520                                 ApiBase::PARAM_MIN => 1,
 521                                 ApiBase::PARAM_MAX => ApiBase::LIMIT_BIG1,
 522                                 ApiBase::PARAM_MAX2 => ApiBase::LIMIT_BIG2
 523                         ),
 524                         'type' => array(
 525                                 ApiBase::PARAM_ISMULTI => true,
 526                                 ApiBase::PARAM_TYPE => array(
 527                                         'edit',
 528                                         'new',
 529                                         'log'
 530                                 )
 531                         )
 532                 );
 533         }
 534
 535         public function getParamDescription() {
 536                 return array(
 537                         'start' => 'The timestamp to start enumerating from',
 538                         'end' => 'The timestamp to end enumerating',
 539                         'dir' => 'In which direction to enumerate',
 540                         'namespace' => 'Filter log entries to only this namespace(s)',
 541                         'user' => 'Only list changes by this user',
 542                         'excludeuser' => 'Don\'t list changes by this user',
 543                         'prop' => array(
 544                                 'Include additional pieces of information',
 545                                 ' user           - Adds the user responsible for the edit and tags if they are an IP',
 546                                 ' comment        - Adds the comment for the edit',
 547                                 ' parsedcomment  - Adds the parsed comment for the edit',
 548                                 ' flags          - Adds flags for the edit',
 549                                 ' timestamp      - Adds timestamp of the edit',
 550                                 ' title          - Adds the page title of the edit',
 551                                 ' ids            - Adds the page id, recent changes id and the new and old revision id',
 552                                 ' sizes          - Adds the new and old page length in bytes',
 553                                 ' redirect       - Tags edit if page is a redirect',
 554                                 ' patrolled      - Tags edits have have been patrolled',
 555                                 ' loginfo        - Adds log information (logid, logtype, etc) to log entries',
 556                                 ' tags           - Lists tags for the entry',
 557                         ),
 558                         'token' => 'Which tokens to obtain for each change',
 559                         'show' => array(
 560                                 'Show only items that meet this criteria.',
 561                                 "For example, to see only minor edits done by logged-in users, set {$this->getModulePrefix()}show=minor|!anon"
 562                         ),
 563                         'type' => 'Which types of changes to show',
 564                         'limit' => 'How many total changes to return',
 565                         'tag' => 'Only list changes tagged with this tag',
 566                 );
 567         }
 568
 569         public function getDescription() {
 570                 return 'Enumerate recent changes';
 571         }
 572
 573         public function getPossibleErrors() {
 574                 return array_merge( parent::getPossibleErrors(), array(
 575                         array( 'show' ),
 576                         array( 'code' => 'permissiondenied', 'info' => 'You need the patrol right to request the patrolled flag' ),
 577                         array( 'code' => 'user-excludeuser', 'info' => 'user and excludeuser cannot be used together' ),
 578                 ) );
 579         }
 580
 581         protected function getExamples() {
 582                 return array(
 583                         'api.php?action=query&list=recentchanges'
 584                 );
 585         }
 586
 587         public function getVersion() {
 588                 return __CLASS__ . ': $Id$';
 589         }
 590 }