includes/api/ApiQueryRecentChanges.php

   1 <?php
   2 /**
   3  * API for MediaWiki 1.8+
   4  *
   5  * Created on Oct 19, 2006
   6  *
   7  * Copyright © 2006 Yuri Astrakhan <Firstname><Lastname>@gmail.com
   8  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License as published by
  11  * the Free Software Foundation; either version 2 of the License, or
  12  * (at your option) any later version.
  13  *
  14  * This program is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  17  * GNU General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU General Public License along
  20  * with this program; if not, write to the Free Software Foundation, Inc.,
  21  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  22  * http://www.gnu.org/copyleft/gpl.html
  23  *
  24  * @file
  25  */
  26
  27 if ( !defined( 'MEDIAWIKI' ) ) {
  28         // Eclipse helper - will be ignored in production
  29         require_once( 'ApiQueryBase.php' );
  30 }
  31
  32 /**
  33  * A query action to enumerate the recent changes that were done to the wiki.
  34  * Various filters are supported.
  35  *
  36  * @ingroup API
  37  */
  38 class ApiQueryRecentChanges extends ApiQueryBase {
  39
  40         public function __construct( $query, $moduleName ) {
  41                 parent::__construct( $query, $moduleName, 'rc' );
  42         }
  43
  44         private $fld_comment = false, $fld_parsedcomment = false, $fld_user = false, $fld_userid = false,
  45                         $fld_flags = false, $fld_timestamp = false, $fld_title = false, $fld_ids = false,
  46                         $fld_sizes = false, $fld_redirect = false, $fld_patrolled = false, $fld_loginfo = false, $fld_tags = false;
  47
  48         private $tokenFunctions;
  49
  50         /**
  51          * Get an array mapping token names to their handler functions.
  52          * The prototype for a token function is func($pageid, $title, $rc)
  53          * it should return a token or false (permission denied)
  54          * @return array(tokenname => function)
  55          */
  56         protected function getTokenFunctions() {
  57                 // Don't call the hooks twice
  58                 if ( isset( $this->tokenFunctions ) ) {
  59                         return $this->tokenFunctions;
  60                 }
  61
  62                 // If we're in JSON callback mode, no tokens can be obtained
  63                 if ( !is_null( $this->getMain()->getRequest()->getVal( 'callback' ) ) ) {
  64                         return array();
  65                 }
  66
  67                 $this->tokenFunctions = array(
  68                         'patrol' => array( 'ApiQueryRecentChanges', 'getPatrolToken' )
  69                 );
  70                 wfRunHooks( 'APIQueryRecentChangesTokens', array( &$this->tokenFunctions ) );
  71                 return $this->tokenFunctions;
  72         }
  73
  74         public static function getPatrolToken( $pageid, $title, $rc ) {
  75                 global $wgUser;
  76                 if ( !$wgUser->useRCPatrol() && ( !$wgUser->useNPPatrol() ||
  77                                 $rc->getAttribute( 'rc_type' ) != RC_NEW ) )
  78                 {
  79                         return false;
  80                 }
  81
  82                 return $wgUser->editToken( $rc->getAttribute( 'rc_id' ) );
  83         }
  84
  85         /**
  86          * Sets internal state to include the desired properties in the output.
  87          * @param $prop Array associative array of properties, only keys are used here
  88          */
  89         public function initProperties( $prop ) {
  90                 $this->fld_comment = isset( $prop['comment'] );
  91                 $this->fld_parsedcomment = isset( $prop['parsedcomment'] );
  92                 $this->fld_user = isset( $prop['user'] );
  93                 $this->fld_userid = isset( $prop['userid'] );
  94                 $this->fld_flags = isset( $prop['flags'] );
  95                 $this->fld_timestamp = isset( $prop['timestamp'] );
  96                 $this->fld_title = isset( $prop['title'] );
  97                 $this->fld_ids = isset( $prop['ids'] );
  98                 $this->fld_sizes = isset( $prop['sizes'] );
  99                 $this->fld_redirect = isset( $prop['redirect'] );
 100                 $this->fld_patrolled = isset( $prop['patrolled'] );
 101                 $this->fld_loginfo = isset( $prop['loginfo'] );
 102                 $this->fld_tags = isset( $prop['tags'] );
 103         }
 104
 105         /**
 106          * Generates and outputs the result of this query based upon the provided parameters.
 107          */
 108         public function execute() {
 109                 global $wgUser;
 110                 /* Get the parameters of the request. */
 111                 $params = $this->extractRequestParams();
 112
 113                 /* Build our basic query. Namely, something along the lines of:
 114                  * SELECT * FROM recentchanges WHERE rc_timestamp > $start
 115                  *              AND rc_timestamp < $end AND rc_namespace = $namespace
 116                  *              AND rc_deleted = '0'
 117                  */
 118                 $this->addTables( 'recentchanges' );
 119                 $index = array( 'recentchanges' => 'rc_timestamp' ); // May change
 120                 $this->addWhereRange( 'rc_timestamp', $params['dir'], $params['start'], $params['end'] );
 121                 $this->addWhereFld( 'rc_namespace', $params['namespace'] );
 122                 $this->addWhereFld( 'rc_deleted', 0 );
 123
 124                 if ( !is_null( $params['type'] ) ) {
 125                         $this->addWhereFld( 'rc_type', $this->parseRCType( $params['type'] ) );
 126                 }
 127
 128                 if ( !is_null( $params['show'] ) ) {
 129                         $show = array_flip( $params['show'] );
 130
 131                         /* Check for conflicting parameters. */
 132                         if ( ( isset( $show['minor'] ) && isset( $show['!minor'] ) )
 133                                         || ( isset( $show['bot'] ) && isset( $show['!bot'] ) )
 134                                         || ( isset( $show['anon'] ) && isset( $show['!anon'] ) )
 135                                         || ( isset( $show['redirect'] ) && isset( $show['!redirect'] ) )
 136                                         || ( isset( $show['patrolled'] ) && isset( $show['!patrolled'] ) )
 137                         )
 138                         {
 139                                 $this->dieUsageMsg( array( 'show' ) );
 140                         }
 141
 142                         // Check permissions
 143                         if ( isset( $show['patrolled'] ) || isset( $show['!patrolled'] ) ) {
 144                                 if ( !$wgUser->useRCPatrol() && !$wgUser->useNPPatrol() ) {
 145                                         $this->dieUsage( 'You need the patrol right to request the patrolled flag', 'permissiondenied' );
 146                                 }
 147                         }
 148
 149                         /* Add additional conditions to query depending upon parameters. */
 150                         $this->addWhereIf( 'rc_minor = 0', isset( $show['!minor'] ) );
 151                         $this->addWhereIf( 'rc_minor != 0', isset( $show['minor'] ) );
 152                         $this->addWhereIf( 'rc_bot = 0', isset( $show['!bot'] ) );
 153                         $this->addWhereIf( 'rc_bot != 0', isset( $show['bot'] ) );
 154                         $this->addWhereIf( 'rc_user = 0', isset( $show['anon'] ) );
 155                         $this->addWhereIf( 'rc_user != 0', isset( $show['!anon'] ) );
 156                         $this->addWhereIf( 'rc_patrolled = 0', isset( $show['!patrolled'] ) );
 157                         $this->addWhereIf( 'rc_patrolled != 0', isset( $show['patrolled'] ) );
 158                         $this->addWhereIf( 'page_is_redirect = 1', isset( $show['redirect'] ) );
 159
 160                         // Don't throw log entries out the window here
 161                         $this->addWhereIf( 'page_is_redirect = 0 OR page_is_redirect IS NULL', isset( $show['!redirect'] ) );
 162                 }
 163
 164                 if ( !is_null( $params['user'] ) && !is_null( $params['excludeuser'] ) ) {
 165                         $this->dieUsage( 'user and excludeuser cannot be used together', 'user-excludeuser' );
 166                 }
 167
 168                 if ( !is_null( $params['user'] ) ) {
 169                         $this->addWhereFld( 'rc_user_text', $params['user'] );
 170                         $index['recentchanges'] = 'rc_user_text';
 171                 }
 172
 173                 if ( !is_null( $params['excludeuser'] ) ) {
 174                         // We don't use the rc_user_text index here because
 175                         // * it would require us to sort by rc_user_text before rc_timestamp
 176                         // * the != condition doesn't throw out too many rows anyway
 177                         $this->addWhere( 'rc_user_text != ' . $this->getDB()->addQuotes( $params['excludeuser'] ) );
 178                 }
 179
 180                 /* Add the fields we're concerned with to our query. */
 181                 $this->addFields( array(
 182                         'rc_timestamp',
 183                         'rc_namespace',
 184                         'rc_title',
 185                         'rc_cur_id',
 186                         'rc_type',
 187                         'rc_moved_to_ns',
 188                         'rc_moved_to_title',
 189                         'rc_deleted'
 190                 ) );
 191
 192                 /* Determine what properties we need to display. */
 193                 if ( !is_null( $params['prop'] ) ) {
 194                         $prop = array_flip( $params['prop'] );
 195
 196                         /* Set up internal members based upon params. */
 197                         $this->initProperties( $prop );
 198
 199                         if ( $this->fld_patrolled && !$wgUser->useRCPatrol() && !$wgUser->useNPPatrol() ) {
 200                                 $this->dieUsage( 'You need the patrol right to request the patrolled flag', 'permissiondenied' );
 201                         }
 202
 203                         /* Add fields to our query if they are specified as a needed parameter. */
 204                         $this->addFieldsIf( 'rc_id', $this->fld_ids );
 205                         $this->addFieldsIf( 'rc_this_oldid', $this->fld_ids );
 206                         $this->addFieldsIf( 'rc_last_oldid', $this->fld_ids );
 207                         $this->addFieldsIf( 'rc_comment', $this->fld_comment || $this->fld_parsedcomment );
 208                         $this->addFieldsIf( 'rc_user', $this->fld_user );
 209                         $this->addFieldsIf( 'rc_user_text', $this->fld_user || $this->fld_userid );
 210                         $this->addFieldsIf( 'rc_minor', $this->fld_flags );
 211                         $this->addFieldsIf( 'rc_bot', $this->fld_flags );
 212                         $this->addFieldsIf( 'rc_new', $this->fld_flags );
 213                         $this->addFieldsIf( 'rc_old_len', $this->fld_sizes );
 214                         $this->addFieldsIf( 'rc_new_len', $this->fld_sizes );
 215                         $this->addFieldsIf( 'rc_patrolled', $this->fld_patrolled );
 216                         $this->addFieldsIf( 'rc_logid', $this->fld_loginfo );
 217                         $this->addFieldsIf( 'rc_log_type', $this->fld_loginfo );
 218                         $this->addFieldsIf( 'rc_log_action', $this->fld_loginfo );
 219                         $this->addFieldsIf( 'rc_params', $this->fld_loginfo );
 220                         if ( $this->fld_redirect || isset( $show['redirect'] ) || isset( $show['!redirect'] ) ) {
 221                                 $this->addTables( 'page' );
 222                                 $this->addJoinConds( array( 'page' => array( 'LEFT JOIN', array( 'rc_namespace=page_namespace', 'rc_title=page_title' ) ) ) );
 223                                 $this->addFields( 'page_is_redirect' );
 224                         }
 225                 }
 226
 227                 if ( $this->fld_tags ) {
 228                         $this->addTables( 'tag_summary' );
 229                         $this->addJoinConds( array( 'tag_summary' => array( 'LEFT JOIN', array( 'rc_id=ts_rc_id' ) ) ) );
 230                         $this->addFields( 'ts_tags' );
 231                 }
 232
 233                 if ( !is_null( $params['tag'] ) ) {
 234                         $this->addTables( 'change_tag' );
 235                         $this->addJoinConds( array( 'change_tag' => array( 'INNER JOIN', array( 'rc_id=ct_rc_id' ) ) ) );
 236                         $this->addWhereFld( 'ct_tag' , $params['tag'] );
 237                         global $wgOldChangeTagsIndex;
 238                         $index['change_tag'] = $wgOldChangeTagsIndex ? 'ct_tag' : 'change_tag_tag_id';
 239                 }
 240
 241                 $this->token = $params['token'];
 242                 $this->addOption( 'LIMIT', $params['limit'] + 1 );
 243                 $this->addOption( 'USE INDEX', $index );
 244
 245                 $count = 0;
 246                 /* Perform the actual query. */
 247                 $res = $this->select( __METHOD__ );
 248
 249                 /* Iterate through the rows, adding data extracted from them to our query result. */
 250                 foreach ( $res as $row ) {
 251                         if ( ++ $count > $params['limit'] ) {
 252                                 // We've reached the one extra which shows that there are additional pages to be had. Stop here...
 253                                 $this->setContinueEnumParameter( 'start', wfTimestamp( TS_ISO_8601, $row->rc_timestamp ) );
 254                                 break;
 255                         }
 256
 257                         /* Extract the data from a single row. */
 258                         $vals = $this->extractRowInfo( $row );
 259
 260                         /* Add that row's data to our final output. */
 261                         if ( !$vals ) {
 262                                 continue;
 263                         }
 264                         $fit = $this->getResult()->addValue( array( 'query', $this->getModuleName() ), null, $vals );
 265                         if ( !$fit ) {
 266                                 $this->setContinueEnumParameter( 'start', wfTimestamp( TS_ISO_8601, $row->rc_timestamp ) );
 267                                 break;
 268                         }
 269                 }
 270
 271                 /* Format the result */
 272                 $this->getResult()->setIndexedTagName_internal( array( 'query', $this->getModuleName() ), 'rc' );
 273         }
 274
 275         /**
 276          * Extracts from a single sql row the data needed to describe one recent change.
 277          *
 278          * @param $row The row from which to extract the data.
 279          * @return An array mapping strings (descriptors) to their respective string values.
 280          * @access public
 281          */
 282         public function extractRowInfo( $row ) {
 283                 /* If page was moved somewhere, get the title of the move target. */
 284                 $movedToTitle = false;
 285                 if ( isset( $row->rc_moved_to_title ) && $row->rc_moved_to_title !== '' )
 286                 {
 287                         $movedToTitle = Title::makeTitle( $row->rc_moved_to_ns, $row->rc_moved_to_title );
 288                 }
 289
 290                 /* Determine the title of the page that has been changed. */
 291                 $title = Title::makeTitle( $row->rc_namespace, $row->rc_title );
 292
 293                 /* Our output data. */
 294                 $vals = array();
 295
 296                 $type = intval( $row->rc_type );
 297
 298                 /* Determine what kind of change this was. */
 299                 switch ( $type ) {
 300                         case RC_EDIT:
 301                                 $vals['type'] = 'edit';
 302                                 break;
 303                         case RC_NEW:
 304                                 $vals['type'] = 'new';
 305                                 break;
 306                         case RC_MOVE:
 307                                 $vals['type'] = 'move';
 308                                 break;
 309                         case RC_LOG:
 310                                 $vals['type'] = 'log';
 311                                 break;
 312                         case RC_MOVE_OVER_REDIRECT:
 313                                 $vals['type'] = 'move over redirect';
 314                                 break;
 315                         default:
 316                                 $vals['type'] = $type;
 317                 }
 318
 319                 /* Create a new entry in the result for the title. */
 320                 if ( $this->fld_title ) {
 321                         ApiQueryBase::addTitleInfo( $vals, $title );
 322                         if ( $movedToTitle ) {
 323                                 ApiQueryBase::addTitleInfo( $vals, $movedToTitle, 'new_' );
 324                         }
 325                 }
 326
 327                 /* Add ids, such as rcid, pageid, revid, and oldid to the change's info. */
 328                 if ( $this->fld_ids ) {
 329                         $vals['rcid'] = intval( $row->rc_id );
 330                         $vals['pageid'] = intval( $row->rc_cur_id );
 331                         $vals['revid'] = intval( $row->rc_this_oldid );
 332                         $vals['old_revid'] = intval( $row->rc_last_oldid );
 333                 }
 334
 335                 /* Add user data and 'anon' flag, if use is anonymous. */
 336                 if ( $this->fld_user || $this->fld_userid ) {
 337
 338                         if ( $this->fld_user ) {
 339                                 $vals['user'] = $row->rc_user_text;
 340                         }
 341
 342                         if ( $this->fld_userid ) {
 343                                 $vals['userid'] = $row->rc_user;
 344                         }
 345
 346                         if ( !$row->rc_user ) {
 347                                 $vals['anon'] = '';
 348                         }
 349                 }
 350
 351                 /* Add flags, such as new, minor, bot. */
 352                 if ( $this->fld_flags ) {
 353                         if ( $row->rc_bot ) {
 354                                 $vals['bot'] = '';
 355                         }
 356                         if ( $row->rc_new ) {
 357                                 $vals['new'] = '';
 358                         }
 359                         if ( $row->rc_minor ) {
 360                                 $vals['minor'] = '';
 361                         }
 362                 }
 363
 364                 /* Add sizes of each revision. (Only available on 1.10+) */
 365                 if ( $this->fld_sizes ) {
 366                         $vals['oldlen'] = intval( $row->rc_old_len );
 367                         $vals['newlen'] = intval( $row->rc_new_len );
 368                 }
 369
 370                 /* Add the timestamp. */
 371                 if ( $this->fld_timestamp ) {
 372                         $vals['timestamp'] = wfTimestamp( TS_ISO_8601, $row->rc_timestamp );
 373                 }
 374
 375                 /* Add edit summary / log summary. */
 376                 if ( $this->fld_comment && isset( $row->rc_comment ) ) {
 377                         $vals['comment'] = $row->rc_comment;
 378                 }
 379
 380                 if ( $this->fld_parsedcomment && isset( $row->rc_comment ) ) {
 381                         global $wgUser;
 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                         $tokenFunctions = $this->getTokenFunctions();
 419                         foreach ( $this->token as $t ) {
 420                                 $val = call_user_func( $tokenFunctions[$t], $row->rc_cur_id,
 421                                         $title, RecentChange::newFromRow( $row ) );
 422                                 if ( $val === false ) {
 423                                         $this->setWarning( "Action '$t' is not allowed for the current user" );
 424                                 } else {
 425                                         $vals[$t . 'token'] = $val;
 426                                 }
 427                         }
 428                 }
 429
 430                 return $vals;
 431         }
 432
 433         private function parseRCType( $type ) {
 434                 if ( is_array( $type ) ) {
 435                         $retval = array();
 436                         foreach ( $type as $t ) {
 437                                 $retval[] = $this->parseRCType( $t );
 438                         }
 439                         return $retval;
 440                 }
 441                 switch( $type ) {
 442                         case 'edit':
 443                                 return RC_EDIT;
 444                         case 'new':
 445                                 return RC_NEW;
 446                         case 'log':
 447                                 return RC_LOG;
 448                 }
 449         }
 450
 451         public function getCacheMode( $params ) {
 452                 if ( isset( $params['show'] ) ) {
 453                         foreach ( $params['show'] as $show ) {
 454                                 if ( $show === 'patrolled' || $show === '!patrolled' ) {
 455                                         return 'private';
 456                                 }
 457                         }
 458                 }
 459                 if ( isset( $params['token'] ) ) {
 460                         return 'private';
 461                 }
 462                 if ( !is_null( $params['prop'] ) && in_array( 'parsedcomment', $params['prop'] ) ) {
 463                         // formatComment() calls wfMsg() among other things
 464                         return 'anon-public-user-private';
 465                 }
 466                 return 'public';
 467         }
 468
 469         public function getAllowedParams() {
 470                 return array(
 471                         'start' => array(
 472                                 ApiBase::PARAM_TYPE => 'timestamp'
 473                         ),
 474                         'end' => array(
 475                                 ApiBase::PARAM_TYPE => 'timestamp'
 476                         ),
 477                         'dir' => array(
 478                                 ApiBase::PARAM_DFLT => 'older',
 479                                 ApiBase::PARAM_TYPE => array(
 480                                         'newer',
 481                                         'older'
 482                                 )
 483                         ),
 484                         'namespace' => array(
 485                                 ApiBase::PARAM_ISMULTI => true,
 486                                 ApiBase::PARAM_TYPE => 'namespace'
 487                         ),
 488                         'user' => array(
 489                                 ApiBase::PARAM_TYPE => 'user'
 490                         ),
 491                         'excludeuser' => array(
 492                                 ApiBase::PARAM_TYPE => 'user'
 493                         ),
 494                         'tag' => null,
 495                         'prop' => array(
 496                                 ApiBase::PARAM_ISMULTI => true,
 497                                 ApiBase::PARAM_DFLT => 'title|timestamp|ids',
 498                                 ApiBase::PARAM_TYPE => array(
 499                                         'user',
 500                                         'userid',
 501                                         'comment',
 502                                         'parsedcomment',
 503                                         'flags',
 504                                         'timestamp',
 505                                         'title',
 506                                         'ids',
 507                                         'sizes',
 508                                         'redirect',
 509                                         'patrolled',
 510                                         'loginfo',
 511                                         'tags'
 512                                 )
 513                         ),
 514                         'token' => array(
 515                                 ApiBase::PARAM_TYPE => array_keys( $this->getTokenFunctions() ),
 516                                 ApiBase::PARAM_ISMULTI => true
 517                         ),
 518                         'show' => array(
 519                                 ApiBase::PARAM_ISMULTI => true,
 520                                 ApiBase::PARAM_TYPE => array(
 521                                         'minor',
 522                                         '!minor',
 523                                         'bot',
 524                                         '!bot',
 525                                         'anon',
 526                                         '!anon',
 527                                         'redirect',
 528                                         '!redirect',
 529                                         'patrolled',
 530                                         '!patrolled'
 531                                 )
 532                         ),
 533                         'limit' => array(
 534                                 ApiBase::PARAM_DFLT => 10,
 535                                 ApiBase::PARAM_TYPE => 'limit',
 536                                 ApiBase::PARAM_MIN => 1,
 537                                 ApiBase::PARAM_MAX => ApiBase::LIMIT_BIG1,
 538                                 ApiBase::PARAM_MAX2 => ApiBase::LIMIT_BIG2
 539                         ),
 540                         'type' => array(
 541                                 ApiBase::PARAM_ISMULTI => true,
 542                                 ApiBase::PARAM_TYPE => array(
 543                                         'edit',
 544                                         'new',
 545                                         'log'
 546                                 )
 547                         )
 548                 );
 549         }
 550
 551         public function getParamDescription() {
 552                 return array(
 553                         'start' => 'The timestamp to start enumerating from',
 554                         'end' => 'The timestamp to end enumerating',
 555                         'dir' => 'In which direction to enumerate',
 556                         'namespace' => 'Filter log entries to only this namespace(s)',
 557                         'user' => 'Only list changes by this user',
 558                         'excludeuser' => 'Don\'t list changes by this user',
 559                         'prop' => array(
 560                                 'Include additional pieces of information',
 561                                 ' user           - Adds the user responsible for the edit and tags if they are an IP',
 562                                 ' userid         - Adds the user id responsible for the edit',
 563                                 ' comment        - Adds the comment for the edit',
 564                                 ' parsedcomment  - Adds the parsed comment for the edit',
 565                                 ' flags          - Adds flags for the edit',
 566                                 ' timestamp      - Adds timestamp of the edit',
 567                                 ' title          - Adds the page title of the edit',
 568                                 ' ids            - Adds the page id, recent changes id and the new and old revision id',
 569                                 ' sizes          - Adds the new and old page length in bytes',
 570                                 ' redirect       - Tags edit if page is a redirect',
 571                                 ' patrolled      - Tags edits have have been patrolled',
 572                                 ' loginfo        - Adds log information (logid, logtype, etc) to log entries',
 573                                 ' tags           - Lists tags for the entry',
 574                         ),
 575                         'token' => 'Which tokens to obtain for each change',
 576                         'show' => array(
 577                                 'Show only items that meet this criteria.',
 578                                 "For example, to see only minor edits done by logged-in users, set {$this->getModulePrefix()}show=minor|!anon"
 579                         ),
 580                         'type' => 'Which types of changes to show',
 581                         'limit' => 'How many total changes to return',
 582                         'tag' => 'Only list changes tagged with this tag',
 583                 );
 584         }
 585
 586         public function getDescription() {
 587                 return 'Enumerate recent changes';
 588         }
 589
 590         public function getPossibleErrors() {
 591                 return array_merge( parent::getPossibleErrors(), array(
 592                         array( 'show' ),
 593                         array( 'code' => 'permissiondenied', 'info' => 'You need the patrol right to request the patrolled flag' ),
 594                         array( 'code' => 'user-excludeuser', 'info' => 'user and excludeuser cannot be used together' ),
 595                 ) );
 596         }
 597
 598         protected function getExamples() {
 599                 return array(
 600                         'api.php?action=query&list=recentchanges'
 601                 );
 602         }
 603
 604         public function getVersion() {
 605                 return __CLASS__ . ': $Id$';
 606         }
 607 }