includes/api/ApiQueryRecentChanges.php

   1 <?php
   2 /**
   3  *
   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 /**
  28  * A query action to enumerate the recent changes that were done to the wiki.
  29  * Various filters are supported.
  30  *
  31  * @ingroup API
  32  */
  33 class ApiQueryRecentChanges extends ApiQueryGeneratorBase {
  34
  35         public function __construct( $query, $moduleName ) {
  36                 parent::__construct( $query, $moduleName, 'rc' );
  37         }
  38
  39         private $fld_comment = false, $fld_parsedcomment = false, $fld_user = false, $fld_userid = false,
  40                         $fld_flags = false, $fld_timestamp = false, $fld_title = false, $fld_ids = false,
  41                         $fld_sizes = false, $fld_redirect = false, $fld_patrolled = false, $fld_loginfo = false,
  42                         $fld_tags = false, $token = array();
  43
  44         private $tokenFunctions;
  45
  46         /**
  47          * Get an array mapping token names to their handler functions.
  48          * The prototype for a token function is func($pageid, $title, $rc)
  49          * it should return a token or false (permission denied)
  50          * @return array 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         /**
  71          * @param  $pageid
  72          * @param  $title
  73          * @param $rc RecentChange (optional)
  74          * @return bool|String
  75          */
  76         public static function getPatrolToken( $pageid, $title, $rc = null ) {
  77                 global $wgUser;
  78
  79                 $validTokenUser = false;
  80
  81                 if ( $rc ) {
  82                         if ( ( $wgUser->useRCPatrol() && $rc->getAttribute( 'rc_type' ) == RC_EDIT ) ||
  83                                 ( $wgUser->useNPPatrol() && $rc->getAttribute( 'rc_type' ) == RC_NEW ) )
  84                         {
  85                                 $validTokenUser = true;
  86                         }
  87                 } else {
  88                         if ( $wgUser->useRCPatrol() || $wgUser->useNPPatrol() ) {
  89                                 $validTokenUser = true;
  90                         }
  91                 }
  92
  93                 if ( $validTokenUser ) {
  94                         // The patrol token is always the same, let's exploit that
  95                         static $cachedPatrolToken = null;
  96                         if ( is_null( $cachedPatrolToken ) ) {
  97                                 $cachedPatrolToken = $wgUser->getEditToken( 'patrol' );
  98                         }
  99                         return $cachedPatrolToken;
 100                 } else {
 101                         return false;
 102                 }
 103
 104         }
 105
 106         /**
 107          * Sets internal state to include the desired properties in the output.
 108          * @param $prop Array associative array of properties, only keys are used here
 109          */
 110         public function initProperties( $prop ) {
 111                 $this->fld_comment = isset( $prop['comment'] );
 112                 $this->fld_parsedcomment = isset( $prop['parsedcomment'] );
 113                 $this->fld_user = isset( $prop['user'] );
 114                 $this->fld_userid = isset( $prop['userid'] );
 115                 $this->fld_flags = isset( $prop['flags'] );
 116                 $this->fld_timestamp = isset( $prop['timestamp'] );
 117                 $this->fld_title = isset( $prop['title'] );
 118                 $this->fld_ids = isset( $prop['ids'] );
 119                 $this->fld_sizes = isset( $prop['sizes'] );
 120                 $this->fld_redirect = isset( $prop['redirect'] );
 121                 $this->fld_patrolled = isset( $prop['patrolled'] );
 122                 $this->fld_loginfo = isset( $prop['loginfo'] );
 123                 $this->fld_tags = isset( $prop['tags'] );
 124         }
 125
 126         public function execute() {
 127                 $this->run();
 128         }
 129
 130         public function executeGenerator( $resultPageSet ) {
 131                 $this->run( $resultPageSet );
 132         }
 133
 134         /**
 135          * Generates and outputs the result of this query based upon the provided parameters.
 136          *
 137          * @param $resultPageSet ApiPageSet
 138          */
 139         public function run( $resultPageSet = null ) {
 140                 $user = $this->getUser();
 141                 /* Get the parameters of the request. */
 142                 $params = $this->extractRequestParams();
 143
 144                 /* Build our basic query. Namely, something along the lines of:
 145                  * SELECT * FROM recentchanges WHERE rc_timestamp > $start
 146                  *              AND rc_timestamp < $end AND rc_namespace = $namespace
 147                  *              AND rc_deleted = '0'
 148                  */
 149                 $this->addTables( 'recentchanges' );
 150                 $index = array( 'recentchanges' => 'rc_timestamp' ); // May change
 151                 $this->addTimestampWhereRange( 'rc_timestamp', $params['dir'], $params['start'], $params['end'] );
 152                 $this->addWhereFld( 'rc_namespace', $params['namespace'] );
 153                 $this->addWhereFld( 'rc_deleted', 0 );
 154
 155                 if ( !is_null( $params['type'] ) ) {
 156                         $this->addWhereFld( 'rc_type', $this->parseRCType( $params['type'] ) );
 157                 }
 158
 159                 if ( !is_null( $params['show'] ) ) {
 160                         $show = array_flip( $params['show'] );
 161
 162                         /* Check for conflicting parameters. */
 163                         if ( ( isset( $show['minor'] ) && isset( $show['!minor'] ) )
 164                                         || ( isset( $show['bot'] ) && isset( $show['!bot'] ) )
 165                                         || ( isset( $show['anon'] ) && isset( $show['!anon'] ) )
 166                                         || ( isset( $show['redirect'] ) && isset( $show['!redirect'] ) )
 167                                         || ( isset( $show['patrolled'] ) && isset( $show['!patrolled'] ) )
 168                         ) {
 169                                 $this->dieUsageMsg( 'show' );
 170                         }
 171
 172                         // Check permissions
 173                         if ( isset( $show['patrolled'] ) || isset( $show['!patrolled'] ) ) {
 174                                 if ( !$user->useRCPatrol() && !$user->useNPPatrol() ) {
 175                                         $this->dieUsage( 'You need the patrol right to request the patrolled flag', 'permissiondenied' );
 176                                 }
 177                         }
 178
 179                         /* Add additional conditions to query depending upon parameters. */
 180                         $this->addWhereIf( 'rc_minor = 0', isset( $show['!minor'] ) );
 181                         $this->addWhereIf( 'rc_minor != 0', isset( $show['minor'] ) );
 182                         $this->addWhereIf( 'rc_bot = 0', isset( $show['!bot'] ) );
 183                         $this->addWhereIf( 'rc_bot != 0', isset( $show['bot'] ) );
 184                         $this->addWhereIf( 'rc_user = 0', isset( $show['anon'] ) );
 185                         $this->addWhereIf( 'rc_user != 0', isset( $show['!anon'] ) );
 186                         $this->addWhereIf( 'rc_patrolled = 0', isset( $show['!patrolled'] ) );
 187                         $this->addWhereIf( 'rc_patrolled != 0', isset( $show['patrolled'] ) );
 188                         $this->addWhereIf( 'page_is_redirect = 1', isset( $show['redirect'] ) );
 189
 190                         // Don't throw log entries out the window here
 191                         $this->addWhereIf( 'page_is_redirect = 0 OR page_is_redirect IS NULL', isset( $show['!redirect'] ) );
 192                 }
 193
 194                 if ( !is_null( $params['user'] ) && !is_null( $params['excludeuser'] ) ) {
 195                         $this->dieUsage( 'user and excludeuser cannot be used together', 'user-excludeuser' );
 196                 }
 197
 198                 if ( !is_null( $params['user'] ) ) {
 199                         $this->addWhereFld( 'rc_user_text', $params['user'] );
 200                         $index['recentchanges'] = 'rc_user_text';
 201                 }
 202
 203                 if ( !is_null( $params['excludeuser'] ) ) {
 204                         // We don't use the rc_user_text index here because
 205                         // * it would require us to sort by rc_user_text before rc_timestamp
 206                         // * the != condition doesn't throw out too many rows anyway
 207                         $this->addWhere( 'rc_user_text != ' . $this->getDB()->addQuotes( $params['excludeuser'] ) );
 208                 }
 209
 210                 /* Add the fields we're concerned with to our query. */
 211                 $this->addFields( array(
 212                         'rc_timestamp',
 213                         'rc_namespace',
 214                         'rc_title',
 215                         'rc_cur_id',
 216                         'rc_type',
 217                         'rc_moved_to_ns',
 218                         'rc_moved_to_title',
 219                         'rc_deleted'
 220                 ) );
 221
 222                 $showRedirects = false;
 223                 /* Determine what properties we need to display. */
 224                 if ( !is_null( $params['prop'] ) ) {
 225                         $prop = array_flip( $params['prop'] );
 226
 227                         /* Set up internal members based upon params. */
 228                         $this->initProperties( $prop );
 229
 230                         if ( $this->fld_patrolled && !$user->useRCPatrol() && !$user->useNPPatrol() ) {
 231                                 $this->dieUsage( 'You need the patrol right to request the patrolled flag', 'permissiondenied' );
 232                         }
 233
 234                         /* Add fields to our query if they are specified as a needed parameter. */
 235                         $this->addFieldsIf( array( 'rc_id', 'rc_this_oldid', 'rc_last_oldid' ), $this->fld_ids );
 236                         $this->addFieldsIf( 'rc_comment', $this->fld_comment || $this->fld_parsedcomment );
 237                         $this->addFieldsIf( 'rc_user', $this->fld_user );
 238                         $this->addFieldsIf( 'rc_user_text', $this->fld_user || $this->fld_userid );
 239                         $this->addFieldsIf( array( 'rc_minor', 'rc_new', 'rc_bot' ) , $this->fld_flags );
 240                         $this->addFieldsIf( array( 'rc_old_len', 'rc_new_len' ), $this->fld_sizes );
 241                         $this->addFieldsIf( 'rc_patrolled', $this->fld_patrolled );
 242                         $this->addFieldsIf( array( 'rc_logid', 'rc_log_type', 'rc_log_action', 'rc_params' ), $this->fld_loginfo );
 243                         $showRedirects = $this->fld_redirect || isset( $show['redirect'] ) || isset( $show['!redirect'] );
 244                 }
 245
 246                 if ( $this->fld_tags ) {
 247                         $this->addTables( 'tag_summary' );
 248                         $this->addJoinConds( array( 'tag_summary' => array( 'LEFT JOIN', array( 'rc_id=ts_rc_id' ) ) ) );
 249                         $this->addFields( 'ts_tags' );
 250                 }
 251
 252                 if ( $params['toponly'] || $showRedirects ) {
 253                         $this->addTables( 'page' );
 254                         $this->addJoinConds( array( 'page' => array( 'LEFT JOIN', array( 'rc_namespace=page_namespace', 'rc_title=page_title' ) ) ) );
 255                         $this->addFields( 'page_is_redirect' );
 256
 257                         if ( $params['toponly'] ) {
 258                                 $this->addWhere( 'rc_this_oldid = page_latest' );
 259                         }
 260                 }
 261
 262                 if ( !is_null( $params['tag'] ) ) {
 263                         $this->addTables( 'change_tag' );
 264                         $this->addJoinConds( array( 'change_tag' => array( 'INNER JOIN', array( 'rc_id=ct_rc_id' ) ) ) );
 265                         $this->addWhereFld( 'ct_tag' , $params['tag'] );
 266                         global $wgOldChangeTagsIndex;
 267                         $index['change_tag'] = $wgOldChangeTagsIndex ? 'ct_tag' : 'change_tag_tag_id';
 268                 }
 269
 270                 $this->token = $params['token'];
 271                 $this->addOption( 'LIMIT', $params['limit'] + 1 );
 272                 $this->addOption( 'USE INDEX', $index );
 273
 274                 $count = 0;
 275                 /* Perform the actual query. */
 276                 $res = $this->select( __METHOD__ );
 277
 278                 $titles = array();
 279
 280                 $result = $this->getResult();
 281
 282                 /* Iterate through the rows, adding data extracted from them to our query result. */
 283                 foreach ( $res as $row ) {
 284                         if ( ++ $count > $params['limit'] ) {
 285                                 // We've reached the one extra which shows that there are additional pages to be had. Stop here...
 286                                 $this->setContinueEnumParameter( 'start', wfTimestamp( TS_ISO_8601, $row->rc_timestamp ) );
 287                                 break;
 288                         }
 289
 290                         if ( is_null( $resultPageSet ) ) {
 291                                 /* Extract the data from a single row. */
 292                                 $vals = $this->extractRowInfo( $row );
 293
 294                                 /* Add that row's data to our final output. */
 295                                 if ( !$vals ) {
 296                                         continue;
 297                                 }
 298                                 $fit = $result->addValue( array( 'query', $this->getModuleName() ), null, $vals );
 299                                 if ( !$fit ) {
 300                                         $this->setContinueEnumParameter( 'start', wfTimestamp( TS_ISO_8601, $row->rc_timestamp ) );
 301                                         break;
 302                                 }
 303                         } else {
 304                                 $titles[] = Title::makeTitle( $row->rc_namespace, $row->rc_title );
 305                         }
 306                 }
 307
 308                 if ( is_null( $resultPageSet ) ) {
 309                         /* Format the result */
 310                         $result->setIndexedTagName_internal( array( 'query', $this->getModuleName() ), 'rc' );
 311                 } else {
 312                         $resultPageSet->populateFromTitles( $titles );
 313                 }
 314         }
 315
 316         /**
 317          * Extracts from a single sql row the data needed to describe one recent change.
 318          *
 319          * @param $row The row from which to extract the data.
 320          * @return array An array mapping strings (descriptors) to their respective string values.
 321          * @access public
 322          */
 323         public function extractRowInfo( $row ) {
 324                 /* If page was moved somewhere, get the title of the move target. */
 325                 $movedToTitle = false;
 326                 if ( isset( $row->rc_moved_to_title ) && $row->rc_moved_to_title !== '' ) {
 327                         $movedToTitle = Title::makeTitle( $row->rc_moved_to_ns, $row->rc_moved_to_title );
 328                 }
 329
 330                 /* Determine the title of the page that has been changed. */
 331                 $title = Title::makeTitle( $row->rc_namespace, $row->rc_title );
 332
 333                 /* Our output data. */
 334                 $vals = array();
 335
 336                 $type = intval( $row->rc_type );
 337
 338                 /* Determine what kind of change this was. */
 339                 switch ( $type ) {
 340                         case RC_EDIT:
 341                                 $vals['type'] = 'edit';
 342                                 break;
 343                         case RC_NEW:
 344                                 $vals['type'] = 'new';
 345                                 break;
 346                         case RC_MOVE:
 347                                 $vals['type'] = 'move';
 348                                 break;
 349                         case RC_LOG:
 350                                 $vals['type'] = 'log';
 351                                 break;
 352                         case RC_MOVE_OVER_REDIRECT:
 353                                 $vals['type'] = 'move over redirect';
 354                                 break;
 355                         default:
 356                                 $vals['type'] = $type;
 357                 }
 358
 359                 /* Create a new entry in the result for the title. */
 360                 if ( $this->fld_title ) {
 361                         ApiQueryBase::addTitleInfo( $vals, $title );
 362                         if ( $movedToTitle ) {
 363                                 ApiQueryBase::addTitleInfo( $vals, $movedToTitle, 'new_' );
 364                         }
 365                 }
 366
 367                 /* Add ids, such as rcid, pageid, revid, and oldid to the change's info. */
 368                 if ( $this->fld_ids ) {
 369                         $vals['rcid'] = intval( $row->rc_id );
 370                         $vals['pageid'] = intval( $row->rc_cur_id );
 371                         $vals['revid'] = intval( $row->rc_this_oldid );
 372                         $vals['old_revid'] = intval( $row->rc_last_oldid );
 373                 }
 374
 375                 /* Add user data and 'anon' flag, if use is anonymous. */
 376                 if ( $this->fld_user || $this->fld_userid ) {
 377
 378                         if ( $this->fld_user ) {
 379                                 $vals['user'] = $row->rc_user_text;
 380                         }
 381
 382                         if ( $this->fld_userid ) {
 383                                 $vals['userid'] = $row->rc_user;
 384                         }
 385
 386                         if ( !$row->rc_user ) {
 387                                 $vals['anon'] = '';
 388                         }
 389                 }
 390
 391                 /* Add flags, such as new, minor, bot. */
 392                 if ( $this->fld_flags ) {
 393                         if ( $row->rc_bot ) {
 394                                 $vals['bot'] = '';
 395                         }
 396                         if ( $row->rc_new ) {
 397                                 $vals['new'] = '';
 398                         }
 399                         if ( $row->rc_minor ) {
 400                                 $vals['minor'] = '';
 401                         }
 402                 }
 403
 404                 /* Add sizes of each revision. (Only available on 1.10+) */
 405                 if ( $this->fld_sizes ) {
 406                         $vals['oldlen'] = intval( $row->rc_old_len );
 407                         $vals['newlen'] = intval( $row->rc_new_len );
 408                 }
 409
 410                 /* Add the timestamp. */
 411                 if ( $this->fld_timestamp ) {
 412                         $vals['timestamp'] = wfTimestamp( TS_ISO_8601, $row->rc_timestamp );
 413                 }
 414
 415                 /* Add edit summary / log summary. */
 416                 if ( $this->fld_comment && isset( $row->rc_comment ) ) {
 417                         $vals['comment'] = $row->rc_comment;
 418                 }
 419
 420                 if ( $this->fld_parsedcomment && isset( $row->rc_comment ) ) {
 421                         $vals['parsedcomment'] = Linker::formatComment( $row->rc_comment, $title );
 422                 }
 423
 424                 if ( $this->fld_redirect ) {
 425                         if ( $row->page_is_redirect ) {
 426                                 $vals['redirect'] = '';
 427                         }
 428                 }
 429
 430                 /* Add the patrolled flag */
 431                 if ( $this->fld_patrolled && $row->rc_patrolled == 1 ) {
 432                         $vals['patrolled'] = '';
 433                 }
 434
 435                 if ( $this->fld_loginfo && $row->rc_type == RC_LOG ) {
 436                         $vals['logid'] = intval( $row->rc_logid );
 437                         $vals['logtype'] = $row->rc_log_type;
 438                         $vals['logaction'] = $row->rc_log_action;
 439                         $logEntry = DatabaseLogEntry::newFromRow( (array)$row );
 440                         ApiQueryLogEvents::addLogParams(
 441                                 $this->getResult(),
 442                                 $vals,
 443                                 $logEntry->getParameters(),
 444                                 $logEntry->getType(),
 445                                 $logEntry->getSubtype(),
 446                                 $logEntry->getTimestamp()
 447                         );
 448                 }
 449
 450                 if ( $this->fld_tags ) {
 451                         if ( $row->ts_tags ) {
 452                                 $tags = explode( ',', $row->ts_tags );
 453                                 $this->getResult()->setIndexedTagName( $tags, 'tag' );
 454                                 $vals['tags'] = $tags;
 455                         } else {
 456                                 $vals['tags'] = array();
 457                         }
 458                 }
 459
 460                 if ( !is_null( $this->token ) ) {
 461                         $tokenFunctions = $this->getTokenFunctions();
 462                         foreach ( $this->token as $t ) {
 463                                 $val = call_user_func( $tokenFunctions[$t], $row->rc_cur_id,
 464                                         $title, RecentChange::newFromRow( $row ) );
 465                                 if ( $val === false ) {
 466                                         $this->setWarning( "Action '$t' is not allowed for the current user" );
 467                                 } else {
 468                                         $vals[$t . 'token'] = $val;
 469                                 }
 470                         }
 471                 }
 472
 473                 return $vals;
 474         }
 475
 476         private function parseRCType( $type ) {
 477                 if ( is_array( $type ) ) {
 478                         $retval = array();
 479                         foreach ( $type as $t ) {
 480                                 $retval[] = $this->parseRCType( $t );
 481                         }
 482                         return $retval;
 483                 }
 484                 switch( $type ) {
 485                         case 'edit':
 486                                 return RC_EDIT;
 487                         case 'new':
 488                                 return RC_NEW;
 489                         case 'log':
 490                                 return RC_LOG;
 491                 }
 492         }
 493
 494         public function getCacheMode( $params ) {
 495                 if ( isset( $params['show'] ) ) {
 496                         foreach ( $params['show'] as $show ) {
 497                                 if ( $show === 'patrolled' || $show === '!patrolled' ) {
 498                                         return 'private';
 499                                 }
 500                         }
 501                 }
 502                 if ( isset( $params['token'] ) ) {
 503                         return 'private';
 504                 }
 505                 if ( !is_null( $params['prop'] ) && in_array( 'parsedcomment', $params['prop'] ) ) {
 506                         // formatComment() calls wfMsg() among other things
 507                         return 'anon-public-user-private';
 508                 }
 509                 return 'public';
 510         }
 511
 512         public function getAllowedParams() {
 513                 return array(
 514                         'start' => array(
 515                                 ApiBase::PARAM_TYPE => 'timestamp'
 516                         ),
 517                         'end' => array(
 518                                 ApiBase::PARAM_TYPE => 'timestamp'
 519                         ),
 520                         'dir' => array(
 521                                 ApiBase::PARAM_DFLT => 'older',
 522                                 ApiBase::PARAM_TYPE => array(
 523                                         'newer',
 524                                         'older'
 525                                 )
 526                         ),
 527                         'namespace' => array(
 528                                 ApiBase::PARAM_ISMULTI => true,
 529                                 ApiBase::PARAM_TYPE => 'namespace'
 530                         ),
 531                         'user' => array(
 532                                 ApiBase::PARAM_TYPE => 'user'
 533                         ),
 534                         'excludeuser' => array(
 535                                 ApiBase::PARAM_TYPE => 'user'
 536                         ),
 537                         'tag' => null,
 538                         'prop' => array(
 539                                 ApiBase::PARAM_ISMULTI => true,
 540                                 ApiBase::PARAM_DFLT => 'title|timestamp|ids',
 541                                 ApiBase::PARAM_TYPE => array(
 542                                         'user',
 543                                         'userid',
 544                                         'comment',
 545                                         'parsedcomment',
 546                                         'flags',
 547                                         'timestamp',
 548                                         'title',
 549                                         'ids',
 550                                         'sizes',
 551                                         'redirect',
 552                                         'patrolled',
 553                                         'loginfo',
 554                                         'tags'
 555                                 )
 556                         ),
 557                         'token' => array(
 558                                 ApiBase::PARAM_TYPE => array_keys( $this->getTokenFunctions() ),
 559                                 ApiBase::PARAM_ISMULTI => true
 560                         ),
 561                         'show' => array(
 562                                 ApiBase::PARAM_ISMULTI => true,
 563                                 ApiBase::PARAM_TYPE => array(
 564                                         'minor',
 565                                         '!minor',
 566                                         'bot',
 567                                         '!bot',
 568                                         'anon',
 569                                         '!anon',
 570                                         'redirect',
 571                                         '!redirect',
 572                                         'patrolled',
 573                                         '!patrolled'
 574                                 )
 575                         ),
 576                         'limit' => array(
 577                                 ApiBase::PARAM_DFLT => 10,
 578                                 ApiBase::PARAM_TYPE => 'limit',
 579                                 ApiBase::PARAM_MIN => 1,
 580                                 ApiBase::PARAM_MAX => ApiBase::LIMIT_BIG1,
 581                                 ApiBase::PARAM_MAX2 => ApiBase::LIMIT_BIG2
 582                         ),
 583                         'type' => array(
 584                                 ApiBase::PARAM_ISMULTI => true,
 585                                 ApiBase::PARAM_TYPE => array(
 586                                         'edit',
 587                                         'new',
 588                                         'log'
 589                                 )
 590                         ),
 591                         'toponly' => false,
 592                 );
 593         }
 594
 595         public function getParamDescription() {
 596                 $p = $this->getModulePrefix();
 597                 return array(
 598                         'start' => 'The timestamp to start enumerating from',
 599                         'end' => 'The timestamp to end enumerating',
 600                         'dir' => $this->getDirectionDescription( $p ),
 601                         'namespace' => 'Filter log entries to only this namespace(s)',
 602                         'user' => 'Only list changes by this user',
 603                         'excludeuser' => 'Don\'t list changes by this user',
 604                         'prop' => array(
 605                                 'Include additional pieces of information',
 606                                 ' user           - Adds the user responsible for the edit and tags if they are an IP',
 607                                 ' userid         - Adds the user id responsible for the edit',
 608                                 ' comment        - Adds the comment for the edit',
 609                                 ' parsedcomment  - Adds the parsed comment for the edit',
 610                                 ' flags          - Adds flags for the edit',
 611                                 ' timestamp      - Adds timestamp of the edit',
 612                                 ' title          - Adds the page title of the edit',
 613                                 ' ids            - Adds the page ID, recent changes ID and the new and old revision ID',
 614                                 ' sizes          - Adds the new and old page length in bytes',
 615                                 ' redirect       - Tags edit if page is a redirect',
 616                                 ' patrolled      - Tags edits that have been patrolled',
 617                                 ' loginfo        - Adds log information (logid, logtype, etc) to log entries',
 618                                 ' tags           - Lists tags for the entry',
 619                         ),
 620                         'token' => 'Which tokens to obtain for each change',
 621                         'show' => array(
 622                                 'Show only items that meet this criteria.',
 623                                 "For example, to see only minor edits done by logged-in users, set {$p}show=minor|!anon"
 624                         ),
 625                         'type' => 'Which types of changes to show',
 626                         'limit' => 'How many total changes to return',
 627                         'tag' => 'Only list changes tagged with this tag',
 628                         'toponly' => 'Only list changes which are the latest revision',
 629                 );
 630         }
 631
 632         public function getDescription() {
 633                 return 'Enumerate recent changes';
 634         }
 635
 636         public function getPossibleErrors() {
 637                 return array_merge( parent::getPossibleErrors(), array(
 638                         array( 'show' ),
 639                         array( 'code' => 'permissiondenied', 'info' => 'You need the patrol right to request the patrolled flag' ),
 640                         array( 'code' => 'user-excludeuser', 'info' => 'user and excludeuser cannot be used together' ),
 641                 ) );
 642         }
 643
 644         public function getExamples() {
 645                 return array(
 646                         'api.php?action=query&list=recentchanges'
 647                 );
 648         }
 649
 650         public function getHelpUrls() {
 651                 return 'https://www.mediawiki.org/wiki/API:Recentchanges';
 652         }
 653
 654         public function getVersion() {
 655                 return __CLASS__ . ': $Id$';
 656         }
 657 }