includes/api/ApiQueryLogEvents.php

   1 <?php
   2 /**
   3  *
   4  *
   5  * Created on Oct 16, 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  * Query action to List the log events, with optional filtering by various parameters.
  29  *
  30  * @ingroup API
  31  */
  32 class ApiQueryLogEvents extends ApiQueryBase {
  33
  34         public function __construct( ApiQuery $query, $moduleName ) {
  35                 parent::__construct( $query, $moduleName, 'le' );
  36         }
  37
  38         private $fld_ids = false, $fld_title = false, $fld_type = false,
  39                 $fld_user = false, $fld_userid = false,
  40                 $fld_timestamp = false, $fld_comment = false, $fld_parsedcomment = false,
  41                 $fld_details = false, $fld_tags = false;
  42
  43         public function execute() {
  44                 $params = $this->extractRequestParams();
  45                 $db = $this->getDB();
  46                 $this->requireMaxOneParameter( $params, 'title', 'prefix', 'namespace' );
  47
  48                 $prop = array_flip( $params['prop'] );
  49
  50                 $this->fld_ids = isset( $prop['ids'] );
  51                 $this->fld_title = isset( $prop['title'] );
  52                 $this->fld_type = isset( $prop['type'] );
  53                 $this->fld_user = isset( $prop['user'] );
  54                 $this->fld_userid = isset( $prop['userid'] );
  55                 $this->fld_timestamp = isset( $prop['timestamp'] );
  56                 $this->fld_comment = isset( $prop['comment'] );
  57                 $this->fld_parsedcomment = isset( $prop['parsedcomment'] );
  58                 $this->fld_details = isset( $prop['details'] );
  59                 $this->fld_tags = isset( $prop['tags'] );
  60
  61                 $hideLogs = LogEventsList::getExcludeClause( $db, 'user', $this->getUser() );
  62                 if ( $hideLogs !== false ) {
  63                         $this->addWhere( $hideLogs );
  64                 }
  65
  66                 // Order is significant here
  67                 $this->addTables( array( 'logging', 'user', 'page' ) );
  68                 $this->addJoinConds( array(
  69                         'user' => array( 'LEFT JOIN',
  70                                 'user_id=log_user' ),
  71                         'page' => array( 'LEFT JOIN',
  72                                 array( 'log_namespace=page_namespace',
  73                                         'log_title=page_title' ) ) ) );
  74
  75                 $this->addFields( array(
  76                         'log_id',
  77                         'log_type',
  78                         'log_action',
  79                         'log_timestamp',
  80                         'log_deleted',
  81                 ) );
  82
  83                 $this->addFieldsIf( 'page_id', $this->fld_ids );
  84                 // log_page is the page_id saved at log time, whereas page_id is from a
  85                 // join at query time.  This leads to different results in various
  86                 // scenarios, e.g. deletion, recreation.
  87                 $this->addFieldsIf( 'log_page', $this->fld_ids );
  88                 $this->addFieldsIf( array( 'log_user', 'log_user_text', 'user_name' ), $this->fld_user );
  89                 $this->addFieldsIf( 'log_user', $this->fld_userid );
  90                 $this->addFieldsIf(
  91                         array( 'log_namespace', 'log_title' ),
  92                         $this->fld_title || $this->fld_parsedcomment
  93                 );
  94                 $this->addFieldsIf( 'log_comment', $this->fld_comment || $this->fld_parsedcomment );
  95                 $this->addFieldsIf( 'log_params', $this->fld_details );
  96
  97                 if ( $this->fld_tags ) {
  98                         $this->addTables( 'tag_summary' );
  99                         $this->addJoinConds( array( 'tag_summary' => array( 'LEFT JOIN', 'log_id=ts_log_id' ) ) );
 100                         $this->addFields( 'ts_tags' );
 101                 }
 102
 103                 if ( !is_null( $params['tag'] ) ) {
 104                         $this->addTables( 'change_tag' );
 105                         $this->addJoinConds( array( 'change_tag' => array( 'INNER JOIN',
 106                                 array( 'log_id=ct_log_id' ) ) ) );
 107                         $this->addWhereFld( 'ct_tag', $params['tag'] );
 108                 }
 109
 110                 if ( !is_null( $params['action'] ) ) {
 111                         // Do validation of action param, list of allowed actions can contains wildcards
 112                         // Allow the param, when the actions is in the list or a wildcard version is listed.
 113                         $logAction = $params['action'];
 114                         if ( strpos( $logAction, '/' ) === false ) {
 115                                 // all items in the list have a slash
 116                                 $valid = false;
 117                         } else {
 118                                 $logActions = array_flip( $this->getAllowedLogActions() );
 119                                 list( $type, $action ) = explode( '/', $logAction, 2 );
 120                                 $valid = isset( $logActions[$logAction] ) || isset( $logActions[$type . '/*'] );
 121                         }
 122
 123                         if ( !$valid ) {
 124                                 $valueName = $this->encodeParamName( 'action' );
 125                                 $this->dieUsage(
 126                                         "Unrecognized value for parameter '$valueName': {$logAction}",
 127                                         "unknown_$valueName"
 128                                 );
 129                         }
 130
 131                         $this->addWhereFld( 'log_type', $type );
 132                         $this->addWhereFld( 'log_action', $action );
 133                 } elseif ( !is_null( $params['type'] ) ) {
 134                         $this->addWhereFld( 'log_type', $params['type'] );
 135                 }
 136
 137                 $this->addTimestampWhereRange(
 138                         'log_timestamp',
 139                         $params['dir'],
 140                         $params['start'],
 141                         $params['end']
 142                 );
 143                 // Include in ORDER BY for uniqueness
 144                 $this->addWhereRange( 'log_id', $params['dir'], null, null );
 145
 146                 if ( !is_null( $params['continue'] ) ) {
 147                         $cont = explode( '|', $params['continue'] );
 148                         $this->dieContinueUsageIf( count( $cont ) != 2 );
 149                         $op = ( $params['dir'] === 'newer' ? '>' : '<' );
 150                         $continueTimestamp = $db->addQuotes( $db->timestamp( $cont[0] ) );
 151                         $continueId = (int)$cont[1];
 152                         $this->dieContinueUsageIf( $continueId != $cont[1] );
 153                         $this->addWhere( "log_timestamp $op $continueTimestamp OR " .
 154                                 "(log_timestamp = $continueTimestamp AND " .
 155                                 "log_id $op= $continueId)"
 156                         );
 157                 }
 158
 159                 $limit = $params['limit'];
 160                 $this->addOption( 'LIMIT', $limit + 1 );
 161
 162                 $user = $params['user'];
 163                 if ( !is_null( $user ) ) {
 164                         $userid = User::idFromName( $user );
 165                         if ( $userid ) {
 166                                 $this->addWhereFld( 'log_user', $userid );
 167                         } else {
 168                                 $this->addWhereFld( 'log_user_text', IP::sanitizeIP( $user ) );
 169                         }
 170                 }
 171
 172                 $title = $params['title'];
 173                 if ( !is_null( $title ) ) {
 174                         $titleObj = Title::newFromText( $title );
 175                         if ( is_null( $titleObj ) ) {
 176                                 $this->dieUsage( "Bad title value '$title'", 'param_title' );
 177                         }
 178                         $this->addWhereFld( 'log_namespace', $titleObj->getNamespace() );
 179                         $this->addWhereFld( 'log_title', $titleObj->getDBkey() );
 180                 }
 181
 182                 if ( $params['namespace'] !== null ) {
 183                         $this->addWhereFld( 'log_namespace', $params['namespace'] );
 184                 }
 185
 186                 $prefix = $params['prefix'];
 187
 188                 if ( !is_null( $prefix ) ) {
 189                         if ( $this->getConfig()->get( 'MiserMode' ) ) {
 190                                 $this->dieUsage( 'Prefix search disabled in Miser Mode', 'prefixsearchdisabled' );
 191                         }
 192
 193                         $title = Title::newFromText( $prefix );
 194                         if ( is_null( $title ) ) {
 195                                 $this->dieUsage( "Bad title value '$prefix'", 'param_prefix' );
 196                         }
 197                         $this->addWhereFld( 'log_namespace', $title->getNamespace() );
 198                         $this->addWhere( 'log_title ' . $db->buildLike( $title->getDBkey(), $db->anyString() ) );
 199                 }
 200
 201                 // Paranoia: avoid brute force searches (bug 17342)
 202                 if ( $params['namespace'] !== null || !is_null( $title ) || !is_null( $user ) ) {
 203                         if ( !$this->getUser()->isAllowed( 'deletedhistory' ) ) {
 204                                 $titleBits = LogPage::DELETED_ACTION;
 205                                 $userBits = LogPage::DELETED_USER;
 206                         } elseif ( !$this->getUser()->isAllowedAny( 'suppressrevision', 'viewsuppressed' ) ) {
 207                                 $titleBits = LogPage::DELETED_ACTION | LogPage::DELETED_RESTRICTED;
 208                                 $userBits = LogPage::DELETED_USER | LogPage::DELETED_RESTRICTED;
 209                         } else {
 210                                 $titleBits = 0;
 211                                 $userBits = 0;
 212                         }
 213                         if ( ( $params['namespace'] !== null || !is_null( $title ) ) && $titleBits ) {
 214                                 $this->addWhere( $db->bitAnd( 'log_deleted', $titleBits ) . " != $titleBits" );
 215                         }
 216                         if ( !is_null( $user ) && $userBits ) {
 217                                 $this->addWhere( $db->bitAnd( 'log_deleted', $userBits ) . " != $userBits" );
 218                         }
 219                 }
 220
 221                 $count = 0;
 222                 $res = $this->select( __METHOD__ );
 223                 $result = $this->getResult();
 224                 foreach ( $res as $row ) {
 225                         if ( ++$count > $limit ) {
 226                                 // We've reached the one extra which shows that there are
 227                                 // additional pages to be had. Stop here...
 228                                 $this->setContinueEnumParameter( 'continue', "$row->log_timestamp|$row->log_id" );
 229                                 break;
 230                         }
 231
 232                         $vals = $this->extractRowInfo( $row );
 233                         if ( !$vals ) {
 234                                 continue;
 235                         }
 236                         $fit = $result->addValue( array( 'query', $this->getModuleName() ), null, $vals );
 237                         if ( !$fit ) {
 238                                 $this->setContinueEnumParameter( 'continue', "$row->log_timestamp|$row->log_id" );
 239                                 break;
 240                         }
 241                 }
 242                 $result->setIndexedTagName_internal( array( 'query', $this->getModuleName() ), 'item' );
 243         }
 244
 245         /**
 246          * @param ApiResult $result
 247          * @param array $vals
 248          * @param string $params
 249          * @param string $type
 250          * @param string $action
 251          * @param string $ts
 252          * @param bool $legacy
 253          * @return array
 254          */
 255         public static function addLogParams( $result, &$vals, $params, $type,
 256                 $action, $ts, $legacy = false
 257         ) {
 258                 switch ( $type ) {
 259                         case 'move':
 260                                 if ( $legacy ) {
 261                                         $targetKey = 0;
 262                                         $noredirKey = 1;
 263                                 } else {
 264                                         $targetKey = '4::target';
 265                                         $noredirKey = '5::noredir';
 266                                 }
 267
 268                                 if ( isset( $params[$targetKey] ) ) {
 269                                         $title = Title::newFromText( $params[$targetKey] );
 270                                         if ( $title ) {
 271                                                 $vals2 = array();
 272                                                 ApiQueryBase::addTitleInfo( $vals2, $title, 'new_' );
 273                                                 $vals[$type] = $vals2;
 274                                         }
 275                                 }
 276                                 if ( isset( $params[$noredirKey] ) && $params[$noredirKey] ) {
 277                                         $vals[$type]['suppressedredirect'] = '';
 278                                 }
 279                                 $params = null;
 280                                 break;
 281                         case 'patrol':
 282                                 if ( $legacy ) {
 283                                         $cur = 0;
 284                                         $prev = 1;
 285                                         $auto = 2;
 286                                 } else {
 287                                         $cur = '4::curid';
 288                                         $prev = '5::previd';
 289                                         $auto = '6::auto';
 290                                 }
 291                                 $vals2 = array();
 292                                 $vals2['cur'] = $params[$cur];
 293                                 $vals2['prev'] = $params[$prev];
 294                                 $vals2['auto'] = $params[$auto];
 295                                 $vals[$type] = $vals2;
 296                                 $params = null;
 297                                 break;
 298                         case 'rights':
 299                                 $vals2 = array();
 300                                 if ( $legacy ) {
 301                                         list( $vals2['old'], $vals2['new'] ) = $params;
 302                                 } else {
 303                                         $vals2['new'] = implode( ', ', $params['5::newgroups'] );
 304                                         $vals2['old'] = implode( ', ', $params['4::oldgroups'] );
 305                                 }
 306                                 $vals[$type] = $vals2;
 307                                 $params = null;
 308                                 break;
 309                         case 'block':
 310                                 if ( $action == 'unblock' ) {
 311                                         break;
 312                                 }
 313                                 if ( $legacy ) {
 314                                         $durationKey = 0;
 315                                         $flagsKey = 1;
 316                                 } else {
 317                                         $durationKey = '5::duration';
 318                                         $flagsKey = '6::flags';
 319                                 }
 320                                 $vals2 = array();
 321                                 $vals2['duration'] = $params[$durationKey];
 322                                 $vals2['flags'] = isset( $params[$flagsKey] ) ? $params[$flagsKey] : '';
 323
 324                                 // Indefinite blocks have no expiry time
 325                                 if ( SpecialBlock::parseExpiryInput( $params[$durationKey] ) !== wfGetDB( DB_SLAVE )->getInfinity() ) {
 326                                         $vals2['expiry'] = wfTimestamp( TS_ISO_8601,
 327                                                 strtotime( $params[$durationKey], wfTimestamp( TS_UNIX, $ts ) ) );
 328                                 }
 329                                 $vals[$type] = $vals2;
 330                                 $params = null;
 331                                 break;
 332                         case 'upload':
 333                                 if ( isset( $params['img_timestamp'] ) ) {
 334                                         $params['img_timestamp'] = wfTimestamp( TS_ISO_8601, $params['img_timestamp'] );
 335                                 }
 336                                 break;
 337                         case 'merge':
 338                                 // replace the named parameter with numbered for backward compatibility
 339                                 if ( isset( $params['4::dest'] ) ) {
 340                                         $params[] = $params['4::dest'];
 341                                         unset( $params['4::dest'] );
 342                                 }
 343                                 if ( isset( $params['5::mergepoint'] ) ) {
 344                                         $params[] = $params['5::mergepoint'];
 345                                         unset( $params['5::mergepoint'] );
 346                                 }
 347                                 break;
 348                         case 'delete':
 349                                 if ( $action === 'event' || $action === 'revision' ) {
 350                                         // replace the named parameter with numbered for backward compatibility
 351                                         if ( $action === 'event' ) {
 352                                                 $idsKey = '4::ids';
 353                                                 $ofieldKey = '5::ofield';
 354                                                 $nfieldKey = '6::nfield';
 355                                         } else {
 356                                                 if ( isset( $params['4::type'] ) ) {
 357                                                         $params[] = $params['4::type'];
 358                                                         unset( $params['4::type'] );
 359                                                 }
 360                                                 $idsKey = '5::ids';
 361                                                 $ofieldKey = '6::ofield';
 362                                                 $nfieldKey = '7::nfield';
 363                                         }
 364                                         if ( isset( $params[$idsKey] ) ) {
 365                                                 $params[] = implode( ',', $params[$idsKey] );
 366                                                 unset( $params[$idsKey] );
 367                                         }
 368                                         if ( isset( $params[$ofieldKey] ) ) {
 369                                                 $params[] = $params[$ofieldKey];
 370                                                 unset( $params[$ofieldKey] );
 371                                         }
 372                                         if ( isset( $params[$nfieldKey] ) ) {
 373                                                 $params[] = $params[$nfieldKey];
 374                                                 unset( $params[$nfieldKey] );
 375                                         }
 376                                 }
 377                                 break;
 378                 }
 379                 if ( !is_null( $params ) ) {
 380                         $logParams = array();
 381                         // Keys like "4::paramname" can't be used for output so we change them to "paramname"
 382                         foreach ( $params as $key => $value ) {
 383                                 if ( strpos( $key, ':' ) === false ) {
 384                                         $logParams[$key] = $value;
 385                                         continue;
 386                                 }
 387                                 $logParam = explode( ':', $key, 3 );
 388                                 $logParams[$logParam[2]] = $value;
 389                         }
 390                         $result->setIndexedTagName( $logParams, 'param' );
 391                         $result->setIndexedTagName_recursive( $logParams, 'param' );
 392                         $vals = array_merge( $vals, $logParams );
 393                 }
 394
 395                 return $vals;
 396         }
 397
 398         private function extractRowInfo( $row ) {
 399                 $logEntry = DatabaseLogEntry::newFromRow( $row );
 400                 $vals = array();
 401                 $anyHidden = false;
 402                 $user = $this->getUser();
 403
 404                 if ( $this->fld_ids ) {
 405                         $vals['logid'] = intval( $row->log_id );
 406                 }
 407
 408                 if ( $this->fld_title || $this->fld_parsedcomment ) {
 409                         $title = Title::makeTitle( $row->log_namespace, $row->log_title );
 410                 }
 411
 412                 if ( $this->fld_title || $this->fld_ids || $this->fld_details && $row->log_params !== '' ) {
 413                         if ( LogEventsList::isDeleted( $row, LogPage::DELETED_ACTION ) ) {
 414                                 $vals['actionhidden'] = '';
 415                                 $anyHidden = true;
 416                         }
 417                         if ( LogEventsList::userCan( $row, LogPage::DELETED_ACTION, $user ) ) {
 418                                 if ( $this->fld_title ) {
 419                                         ApiQueryBase::addTitleInfo( $vals, $title );
 420                                 }
 421                                 if ( $this->fld_ids ) {
 422                                         $vals['pageid'] = intval( $row->page_id );
 423                                         $vals['logpage'] = intval( $row->log_page );
 424                                 }
 425                                 if ( $this->fld_details && $row->log_params !== '' ) {
 426                                         self::addLogParams(
 427                                                 $this->getResult(),
 428                                                 $vals,
 429                                                 $logEntry->getParameters(),
 430                                                 $logEntry->getType(),
 431                                                 $logEntry->getSubtype(),
 432                                                 $logEntry->getTimestamp(),
 433                                                 $logEntry->isLegacy()
 434                                         );
 435                                 }
 436                         }
 437                 }
 438
 439                 if ( $this->fld_type ) {
 440                         $vals['type'] = $row->log_type;
 441                         $vals['action'] = $row->log_action;
 442                 }
 443
 444                 if ( $this->fld_user || $this->fld_userid ) {
 445                         if ( LogEventsList::isDeleted( $row, LogPage::DELETED_USER ) ) {
 446                                 $vals['userhidden'] = '';
 447                                 $anyHidden = true;
 448                         }
 449                         if ( LogEventsList::userCan( $row, LogPage::DELETED_USER, $user ) ) {
 450                                 if ( $this->fld_user ) {
 451                                         $vals['user'] = $row->user_name === null ? $row->log_user_text : $row->user_name;
 452                                 }
 453                                 if ( $this->fld_userid ) {
 454                                         $vals['userid'] = intval( $row->log_user );
 455                                 }
 456
 457                                 if ( !$row->log_user ) {
 458                                         $vals['anon'] = '';
 459                                 }
 460                         }
 461                 }
 462                 if ( $this->fld_timestamp ) {
 463                         $vals['timestamp'] = wfTimestamp( TS_ISO_8601, $row->log_timestamp );
 464                 }
 465
 466                 if ( ( $this->fld_comment || $this->fld_parsedcomment ) && isset( $row->log_comment ) ) {
 467                         if ( LogEventsList::isDeleted( $row, LogPage::DELETED_COMMENT ) ) {
 468                                 $vals['commenthidden'] = '';
 469                                 $anyHidden = true;
 470                         }
 471                         if ( LogEventsList::userCan( $row, LogPage::DELETED_COMMENT, $user ) ) {
 472                                 if ( $this->fld_comment ) {
 473                                         $vals['comment'] = $row->log_comment;
 474                                 }
 475
 476                                 if ( $this->fld_parsedcomment ) {
 477                                         $vals['parsedcomment'] = Linker::formatComment( $row->log_comment, $title );
 478                                 }
 479                         }
 480                 }
 481
 482                 if ( $this->fld_tags ) {
 483                         if ( $row->ts_tags ) {
 484                                 $tags = explode( ',', $row->ts_tags );
 485                                 $this->getResult()->setIndexedTagName( $tags, 'tag' );
 486                                 $vals['tags'] = $tags;
 487                         } else {
 488                                 $vals['tags'] = array();
 489                         }
 490                 }
 491
 492                 if ( $anyHidden && LogEventsList::isDeleted( $row, LogPage::DELETED_RESTRICTED ) ) {
 493                         $vals['suppressed'] = '';
 494                 }
 495
 496                 return $vals;
 497         }
 498
 499         /**
 500          * @return array
 501          */
 502         private function getAllowedLogActions() {
 503                 $config = $this->getConfig();
 504                 return array_keys( array_merge( $config->get( 'LogActions' ), $config->get( 'LogActionsHandlers' ) ) );
 505         }
 506
 507         public function getCacheMode( $params ) {
 508                 if ( $this->userCanSeeRevDel() ) {
 509                         return 'private';
 510                 }
 511                 if ( !is_null( $params['prop'] ) && in_array( 'parsedcomment', $params['prop'] ) ) {
 512                         // formatComment() calls wfMessage() among other things
 513                         return 'anon-public-user-private';
 514                 } elseif ( LogEventsList::getExcludeClause( $this->getDB(), 'user', $this->getUser() )
 515                         === LogEventsList::getExcludeClause( $this->getDB(), 'public' )
 516                 ) { // Output can only contain public data.
 517                         return 'public';
 518                 } else {
 519                         return 'anon-public-user-private';
 520                 }
 521         }
 522
 523         public function getAllowedParams( $flags = 0 ) {
 524                 $config = $this->getConfig();
 525                 $ret = array(
 526                         'prop' => array(
 527                                 ApiBase::PARAM_ISMULTI => true,
 528                                 ApiBase::PARAM_DFLT => 'ids|title|type|user|timestamp|comment|details',
 529                                 ApiBase::PARAM_TYPE => array(
 530                                         'ids',
 531                                         'title',
 532                                         'type',
 533                                         'user',
 534                                         'userid',
 535                                         'timestamp',
 536                                         'comment',
 537                                         'parsedcomment',
 538                                         'details',
 539                                         'tags'
 540                                 )
 541                         ),
 542                         'type' => array(
 543                                 ApiBase::PARAM_TYPE => $config->get( 'LogTypes' )
 544                         ),
 545                         'action' => array(
 546                                 // validation on request is done in execute()
 547                                 ApiBase::PARAM_TYPE => ( $flags & ApiBase::GET_VALUES_FOR_HELP )
 548                                         ? $this->getAllowedLogActions()
 549                                         : null
 550                         ),
 551                         'start' => array(
 552                                 ApiBase::PARAM_TYPE => 'timestamp'
 553                         ),
 554                         'end' => array(
 555                                 ApiBase::PARAM_TYPE => 'timestamp'
 556                         ),
 557                         'dir' => array(
 558                                 ApiBase::PARAM_DFLT => 'older',
 559                                 ApiBase::PARAM_TYPE => array(
 560                                         'newer',
 561                                         'older'
 562                                 ),
 563                                 ApiBase::PARAM_HELP_MSG => 'api-help-param-direction',
 564                         ),
 565                         'user' => null,
 566                         'title' => null,
 567                         'namespace' => array(
 568                                 ApiBase::PARAM_TYPE => 'namespace'
 569                         ),
 570                         'prefix' => array(),
 571                         'tag' => null,
 572                         'limit' => array(
 573                                 ApiBase::PARAM_DFLT => 10,
 574                                 ApiBase::PARAM_TYPE => 'limit',
 575                                 ApiBase::PARAM_MIN => 1,
 576                                 ApiBase::PARAM_MAX => ApiBase::LIMIT_BIG1,
 577                                 ApiBase::PARAM_MAX2 => ApiBase::LIMIT_BIG2
 578                         ),
 579                         'continue' => array(
 580                                 ApiBase::PARAM_HELP_MSG => 'api-help-param-continue',
 581                         ),
 582                 );
 583
 584                 if ( $config->get( 'MiserMode' ) ) {
 585                         $ret['prefix'][ApiBase::PARAM_HELP_MSG] = 'api-help-param-disabled-in-miser-mode';
 586                 }
 587
 588                 return $ret;
 589         }
 590
 591         protected function getExamplesMessages() {
 592                 return array(
 593                         'action=query&list=logevents'
 594                                 => 'apihelp-query+logevents-example-simple',
 595                 );
 596         }
 597
 598         public function getHelpUrls() {
 599                 return 'https://www.mediawiki.org/wiki/API:Logevents';
 600         }
 601 }