includes/api/ApiQueryUserContributions.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  * This query action adds a list of a specified user's contributions to the output.
  29  *
  30  * @ingroup API
  31  */
  32 class ApiQueryContributions extends ApiQueryBase {
  33
  34         public function __construct( $query, $moduleName ) {
  35                 parent::__construct( $query, $moduleName, 'uc' );
  36         }
  37
  38         private $params, $prefixMode, $userprefix, $multiUserMode, $usernames, $parentLens;
  39         private $fld_ids = false, $fld_title = false, $fld_timestamp = false,
  40                 $fld_comment = false, $fld_parsedcomment = false, $fld_flags = false,
  41                 $fld_patrolled = false, $fld_tags = false, $fld_size = false, $fld_sizediff = false;
  42
  43         public function execute() {
  44                 // Parse some parameters
  45                 $this->params = $this->extractRequestParams();
  46
  47                 $prop = array_flip( $this->params['prop'] );
  48                 $this->fld_ids = isset( $prop['ids'] );
  49                 $this->fld_title = isset( $prop['title'] );
  50                 $this->fld_comment = isset( $prop['comment'] );
  51                 $this->fld_parsedcomment = isset( $prop['parsedcomment'] );
  52                 $this->fld_size = isset( $prop['size'] );
  53                 $this->fld_sizediff = isset( $prop['sizediff'] );
  54                 $this->fld_flags = isset( $prop['flags'] );
  55                 $this->fld_timestamp = isset( $prop['timestamp'] );
  56                 $this->fld_patrolled = isset( $prop['patrolled'] );
  57                 $this->fld_tags = isset( $prop['tags'] );
  58
  59                 // TODO: if the query is going only against the revision table, should this be done?
  60                 $this->selectNamedDB( 'contributions', DB_SLAVE, 'contributions' );
  61
  62                 if ( isset( $this->params['userprefix'] ) ) {
  63                         $this->prefixMode = true;
  64                         $this->multiUserMode = true;
  65                         $this->userprefix = $this->params['userprefix'];
  66                 } else {
  67                         $this->usernames = array();
  68                         if ( !is_array( $this->params['user'] ) ) {
  69                                 $this->params['user'] = array( $this->params['user'] );
  70                         }
  71                         if ( !count( $this->params['user'] ) ) {
  72                                 $this->dieUsage( 'User parameter may not be empty.', 'param_user' );
  73                         }
  74                         foreach ( $this->params['user'] as $u ) {
  75                                 $this->prepareUsername( $u );
  76                         }
  77                         $this->prefixMode = false;
  78                         $this->multiUserMode = ( count( $this->params['user'] ) > 1 );
  79                 }
  80
  81                 $this->prepareQuery();
  82
  83                 // Do the actual query.
  84                 $res = $this->select( __METHOD__ );
  85
  86                 if ( $this->fld_sizediff ) {
  87                         $revIds = array();
  88                         foreach ( $res as $row ) {
  89                                 if ( $row->rev_parent_id ) {
  90                                         $revIds[] = $row->rev_parent_id;
  91                                 }
  92                         }
  93                         $this->parentLens = Revision::getParentLengths( $this->getDB(), $revIds );
  94                         $res->rewind(); // reset
  95                 }
  96
  97                 // Initialise some variables
  98                 $count = 0;
  99                 $limit = $this->params['limit'];
 100
 101                 // Fetch each row
 102                 foreach ( $res as $row ) {
 103                         if ( ++$count > $limit ) {
 104                                 // We've reached the one extra which shows that there are
 105                                 // additional pages to be had. Stop here...
 106                                 if ( $this->multiUserMode ) {
 107                                         $this->setContinueEnumParameter( 'continue', $this->continueStr( $row ) );
 108                                 } else {
 109                                         $this->setContinueEnumParameter( 'start', wfTimestamp( TS_ISO_8601, $row->rev_timestamp ) );
 110                                 }
 111                                 break;
 112                         }
 113
 114                         $vals = $this->extractRowInfo( $row );
 115                         $fit = $this->getResult()->addValue( array( 'query', $this->getModuleName() ), null, $vals );
 116                         if ( !$fit ) {
 117                                 if ( $this->multiUserMode ) {
 118                                         $this->setContinueEnumParameter( 'continue', $this->continueStr( $row ) );
 119                                 } else {
 120                                         $this->setContinueEnumParameter( 'start', wfTimestamp( TS_ISO_8601, $row->rev_timestamp ) );
 121                                 }
 122                                 break;
 123                         }
 124                 }
 125
 126                 $this->getResult()->setIndexedTagName_internal(
 127                         array( 'query', $this->getModuleName() ),
 128                         'item'
 129                 );
 130         }
 131
 132         /**
 133          * Validate the 'user' parameter and set the value to compare
 134          * against `revision`.`rev_user_text`
 135          *
 136          * @param $user string
 137          */
 138         private function prepareUsername( $user ) {
 139                 if ( !is_null( $user ) && $user !== '' ) {
 140                         $name = User::isIP( $user )
 141                                 ? $user
 142                                 : User::getCanonicalName( $user, 'valid' );
 143                         if ( $name === false ) {
 144                                 $this->dieUsage( "User name {$user} is not valid", 'param_user' );
 145                         } else {
 146                                 $this->usernames[] = $name;
 147                         }
 148                 } else {
 149                         $this->dieUsage( 'User parameter may not be empty', 'param_user' );
 150                 }
 151         }
 152
 153         /**
 154          * Prepares the query and returns the limit of rows requested
 155          */
 156         private function prepareQuery() {
 157                 // We're after the revision table, and the corresponding page
 158                 // row for anything we retrieve. We may also need the
 159                 // recentchanges row and/or tag summary row.
 160                 $user = $this->getUser();
 161                 $tables = array( 'page', 'revision' ); // Order may change
 162                 $this->addWhere( 'page_id=rev_page' );
 163
 164                 // Handle continue parameter
 165                 if ( $this->multiUserMode && !is_null( $this->params['continue'] ) ) {
 166                         $continue = explode( '|', $this->params['continue'] );
 167                         $this->dieContinueUsageIf( count( $continue ) != 2 );
 168                         $db = $this->getDB();
 169                         $encUser = $db->addQuotes( $continue[0] );
 170                         $encTS = $db->addQuotes( $db->timestamp( $continue[1] ) );
 171                         $op = ( $this->params['dir'] == 'older' ? '<' : '>' );
 172                         $this->addWhere(
 173                                 "rev_user_text $op $encUser OR " .
 174                                 "(rev_user_text = $encUser AND " .
 175                                 "rev_timestamp $op= $encTS)"
 176                         );
 177                 }
 178
 179                 // Don't include any revisions where we're not supposed to be able to
 180                 // see the username.
 181                 if ( !$user->isAllowed( 'deletedhistory' ) ) {
 182                         $bitmask = Revision::DELETED_USER;
 183                 } elseif ( !$user->isAllowed( 'suppressrevision' ) ) {
 184                         $bitmask = Revision::DELETED_USER | Revision::DELETED_RESTRICTED;
 185                 } else {
 186                         $bitmask = 0;
 187                 }
 188                 if ( $bitmask ) {
 189                         $this->addWhere( $this->getDB()->bitAnd( 'rev_deleted', $bitmask ) . " != $bitmask" );
 190                 }
 191
 192                 // We only want pages by the specified users.
 193                 if ( $this->prefixMode ) {
 194                         $this->addWhere( 'rev_user_text' .
 195                                 $this->getDB()->buildLike( $this->userprefix, $this->getDB()->anyString() ) );
 196                 } else {
 197                         $this->addWhereFld( 'rev_user_text', $this->usernames );
 198                 }
 199                 // ... and in the specified timeframe.
 200                 // Ensure the same sort order for rev_user_text and rev_timestamp
 201                 // so our query is indexed
 202                 if ( $this->multiUserMode ) {
 203                         $this->addWhereRange( 'rev_user_text', $this->params['dir'], null, null );
 204                 }
 205                 $this->addTimestampWhereRange( 'rev_timestamp',
 206                         $this->params['dir'], $this->params['start'], $this->params['end'] );
 207                 $this->addWhereFld( 'page_namespace', $this->params['namespace'] );
 208
 209                 $show = $this->params['show'];
 210                 if ( !is_null( $show ) ) {
 211                         $show = array_flip( $show );
 212                         if ( ( isset( $show['minor'] ) && isset( $show['!minor'] ) )
 213                                 || ( isset( $show['patrolled'] ) && isset( $show['!patrolled'] ) )
 214                         ) {
 215                                 $this->dieUsageMsg( 'show' );
 216                         }
 217
 218                         $this->addWhereIf( 'rev_minor_edit = 0', isset( $show['!minor'] ) );
 219                         $this->addWhereIf( 'rev_minor_edit != 0', isset( $show['minor'] ) );
 220                         $this->addWhereIf( 'rc_patrolled = 0', isset( $show['!patrolled'] ) );
 221                         $this->addWhereIf( 'rc_patrolled != 0', isset( $show['patrolled'] ) );
 222                 }
 223                 $this->addOption( 'LIMIT', $this->params['limit'] + 1 );
 224                 $index = array( 'revision' => 'usertext_timestamp' );
 225
 226                 // Mandatory fields: timestamp allows request continuation
 227                 // ns+title checks if the user has access rights for this page
 228                 // user_text is necessary if multiple users were specified
 229                 $this->addFields( array(
 230                         'rev_timestamp',
 231                         'page_namespace',
 232                         'page_title',
 233                         'rev_user',
 234                         'rev_user_text',
 235                         'rev_deleted'
 236                 ) );
 237
 238                 if ( isset( $show['patrolled'] ) || isset( $show['!patrolled'] ) ||
 239                         $this->fld_patrolled
 240                 ) {
 241                         if ( !$user->useRCPatrol() && !$user->useNPPatrol() ) {
 242                                 $this->dieUsage(
 243                                         'You need the patrol right to request the patrolled flag',
 244                                         'permissiondenied'
 245                                 );
 246                         }
 247
 248                         // Use a redundant join condition on both
 249                         // timestamp and ID so we can use the timestamp
 250                         // index
 251                         $index['recentchanges'] = 'rc_user_text';
 252                         if ( isset( $show['patrolled'] ) || isset( $show['!patrolled'] ) ) {
 253                                 // Put the tables in the right order for
 254                                 // STRAIGHT_JOIN
 255                                 $tables = array( 'revision', 'recentchanges', 'page' );
 256                                 $this->addOption( 'STRAIGHT_JOIN' );
 257                                 $this->addWhere( 'rc_user_text=rev_user_text' );
 258                                 $this->addWhere( 'rc_timestamp=rev_timestamp' );
 259                                 $this->addWhere( 'rc_this_oldid=rev_id' );
 260                         } else {
 261                                 $tables[] = 'recentchanges';
 262                                 $this->addJoinConds( array( 'recentchanges' => array(
 263                                         'LEFT JOIN', array(
 264                                                 'rc_user_text=rev_user_text',
 265                                                 'rc_timestamp=rev_timestamp',
 266                                                 'rc_this_oldid=rev_id' ) ) ) );
 267                         }
 268                 }
 269
 270                 $this->addTables( $tables );
 271                 $this->addFieldsIf( 'rev_page', $this->fld_ids );
 272                 $this->addFieldsIf( 'rev_id', $this->fld_ids || $this->fld_flags );
 273                 $this->addFieldsIf( 'page_latest', $this->fld_flags );
 274                 // $this->addFieldsIf( 'rev_text_id', $this->fld_ids ); // Should this field be exposed?
 275                 $this->addFieldsIf( 'rev_comment', $this->fld_comment || $this->fld_parsedcomment );
 276                 $this->addFieldsIf( 'rev_len', $this->fld_size || $this->fld_sizediff );
 277                 $this->addFieldsIf( 'rev_minor_edit', $this->fld_flags );
 278                 $this->addFieldsIf( 'rev_parent_id', $this->fld_flags || $this->fld_sizediff || $this->fld_ids );
 279                 $this->addFieldsIf( 'rc_patrolled', $this->fld_patrolled );
 280
 281                 if ( $this->fld_tags ) {
 282                         $this->addTables( 'tag_summary' );
 283                         $this->addJoinConds(
 284                                 array( 'tag_summary' => array( 'LEFT JOIN', array( 'rev_id=ts_rev_id' ) ) )
 285                         );
 286                         $this->addFields( 'ts_tags' );
 287                 }
 288
 289                 if ( isset( $this->params['tag'] ) ) {
 290                         $this->addTables( 'change_tag' );
 291                         $this->addJoinConds(
 292                                 array( 'change_tag' => array( 'INNER JOIN', array( 'rev_id=ct_rev_id' ) ) )
 293                         );
 294                         $this->addWhereFld( 'ct_tag', $this->params['tag'] );
 295                 }
 296
 297                 if ( $this->params['toponly'] ) {
 298                         $this->addWhere( 'rev_id = page_latest' );
 299                 }
 300
 301                 $this->addOption( 'USE INDEX', $index );
 302         }
 303
 304         /**
 305          * Extract fields from the database row and append them to a result array
 306          *
 307          * @param $row
 308          * @return array
 309          */
 310         private function extractRowInfo( $row ) {
 311                 $vals = array();
 312                 $anyHidden = false;
 313
 314                 if ( $row->rev_deleted & Revision::DELETED_TEXT ) {
 315                         $vals['texthidden'] = '';
 316                         $anyHidden = true;
 317                 }
 318
 319                 // Any rows where we can't view the user were filtered out in the query.
 320                 $vals['userid'] = $row->rev_user;
 321                 $vals['user'] = $row->rev_user_text;
 322                 if ( $row->rev_deleted & Revision::DELETED_USER ) {
 323                         $vals['userhidden'] = '';
 324                         $anyHidden = true;
 325                 }
 326                 if ( $this->fld_ids ) {
 327                         $vals['pageid'] = intval( $row->rev_page );
 328                         $vals['revid'] = intval( $row->rev_id );
 329                         // $vals['textid'] = intval( $row->rev_text_id ); // todo: Should this field be exposed?
 330
 331                         if ( !is_null( $row->rev_parent_id ) ) {
 332                                 $vals['parentid'] = intval( $row->rev_parent_id );
 333                         }
 334                 }
 335
 336                 $title = Title::makeTitle( $row->page_namespace, $row->page_title );
 337
 338                 if ( $this->fld_title ) {
 339                         ApiQueryBase::addTitleInfo( $vals, $title );
 340                 }
 341
 342                 if ( $this->fld_timestamp ) {
 343                         $vals['timestamp'] = wfTimestamp( TS_ISO_8601, $row->rev_timestamp );
 344                 }
 345
 346                 if ( $this->fld_flags ) {
 347                         if ( $row->rev_parent_id == 0 && !is_null( $row->rev_parent_id ) ) {
 348                                 $vals['new'] = '';
 349                         }
 350                         if ( $row->rev_minor_edit ) {
 351                                 $vals['minor'] = '';
 352                         }
 353                         if ( $row->page_latest == $row->rev_id ) {
 354                                 $vals['top'] = '';
 355                         }
 356                 }
 357
 358                 if ( ( $this->fld_comment || $this->fld_parsedcomment ) && isset( $row->rev_comment ) ) {
 359                         if ( $row->rev_deleted & Revision::DELETED_COMMENT ) {
 360                                 $vals['commenthidden'] = '';
 361                                 $anyHidden = true;
 362                         }
 363
 364                         $userCanView = Revision::userCanBitfield(
 365                                 $row->rev_deleted,
 366                                 Revision::DELETED_COMMENT, $this->getUser()
 367                         );
 368
 369                         if ( $userCanView ) {
 370                                 if ( $this->fld_comment ) {
 371                                         $vals['comment'] = $row->rev_comment;
 372                                 }
 373
 374                                 if ( $this->fld_parsedcomment ) {
 375                                         $vals['parsedcomment'] = Linker::formatComment( $row->rev_comment, $title );
 376                                 }
 377                         }
 378                 }
 379
 380                 if ( $this->fld_patrolled && $row->rc_patrolled ) {
 381                         $vals['patrolled'] = '';
 382                 }
 383
 384                 if ( $this->fld_size && !is_null( $row->rev_len ) ) {
 385                         $vals['size'] = intval( $row->rev_len );
 386                 }
 387
 388                 if ( $this->fld_sizediff
 389                         && !is_null( $row->rev_len )
 390                         && !is_null( $row->rev_parent_id )
 391                 ) {
 392                         $parentLen = isset( $this->parentLens[$row->rev_parent_id] )
 393                                 ? $this->parentLens[$row->rev_parent_id]
 394                                 : 0;
 395                         $vals['sizediff'] = intval( $row->rev_len - $parentLen );
 396                 }
 397
 398                 if ( $this->fld_tags ) {
 399                         if ( $row->ts_tags ) {
 400                                 $tags = explode( ',', $row->ts_tags );
 401                                 $this->getResult()->setIndexedTagName( $tags, 'tag' );
 402                                 $vals['tags'] = $tags;
 403                         } else {
 404                                 $vals['tags'] = array();
 405                         }
 406                 }
 407
 408                 if ( $anyHidden && $row->rev_deleted & Revision::DELETED_RESTRICTED ) {
 409                         $vals['suppressed'] = '';
 410                 }
 411
 412                 return $vals;
 413         }
 414
 415         private function continueStr( $row ) {
 416                 return $row->rev_user_text . '|' .
 417                         wfTimestamp( TS_ISO_8601, $row->rev_timestamp );
 418         }
 419
 420         public function getCacheMode( $params ) {
 421                 // This module provides access to deleted revisions and patrol flags if
 422                 // the requester is logged in
 423                 return 'anon-public-user-private';
 424         }
 425
 426         public function getAllowedParams() {
 427                 return array(
 428                         'limit' => array(
 429                                 ApiBase::PARAM_DFLT => 10,
 430                                 ApiBase::PARAM_TYPE => 'limit',
 431                                 ApiBase::PARAM_MIN => 1,
 432                                 ApiBase::PARAM_MAX => ApiBase::LIMIT_BIG1,
 433                                 ApiBase::PARAM_MAX2 => ApiBase::LIMIT_BIG2
 434                         ),
 435                         'start' => array(
 436                                 ApiBase::PARAM_TYPE => 'timestamp'
 437                         ),
 438                         'end' => array(
 439                                 ApiBase::PARAM_TYPE => 'timestamp'
 440                         ),
 441                         'continue' => null,
 442                         'user' => array(
 443                                 ApiBase::PARAM_ISMULTI => true
 444                         ),
 445                         'userprefix' => null,
 446                         'dir' => array(
 447                                 ApiBase::PARAM_DFLT => 'older',
 448                                 ApiBase::PARAM_TYPE => array(
 449                                         'newer',
 450                                         'older'
 451                                 )
 452                         ),
 453                         'namespace' => array(
 454                                 ApiBase::PARAM_ISMULTI => true,
 455                                 ApiBase::PARAM_TYPE => 'namespace'
 456                         ),
 457                         'prop' => array(
 458                                 ApiBase::PARAM_ISMULTI => true,
 459                                 ApiBase::PARAM_DFLT => 'ids|title|timestamp|comment|size|flags',
 460                                 ApiBase::PARAM_TYPE => array(
 461                                         'ids',
 462                                         'title',
 463                                         'timestamp',
 464                                         'comment',
 465                                         'parsedcomment',
 466                                         'size',
 467                                         'sizediff',
 468                                         'flags',
 469                                         'patrolled',
 470                                         'tags'
 471                                 )
 472                         ),
 473                         'show' => array(
 474                                 ApiBase::PARAM_ISMULTI => true,
 475                                 ApiBase::PARAM_TYPE => array(
 476                                         'minor',
 477                                         '!minor',
 478                                         'patrolled',
 479                                         '!patrolled',
 480                                 )
 481                         ),
 482                         'tag' => null,
 483                         'toponly' => false,
 484                 );
 485         }
 486
 487         public function getParamDescription() {
 488                 global $wgRCMaxAge;
 489                 $p = $this->getModulePrefix();
 490
 491                 return array(
 492                         'limit' => 'The maximum number of contributions to return',
 493                         'start' => 'The start timestamp to return from',
 494                         'end' => 'The end timestamp to return to',
 495                         'continue' => 'When more results are available, use this to continue',
 496                         'user' => 'The users to retrieve contributions for',
 497                         'userprefix' => array(
 498                                 "Retrieve contributions for all users whose names begin with this value.",
 499                                 "Overrides {$p}user",
 500                         ),
 501                         'dir' => $this->getDirectionDescription( $p ),
 502                         'namespace' => 'Only list contributions in these namespaces',
 503                         'prop' => array(
 504                                 'Include additional pieces of information',
 505                                 ' ids            - Adds the page ID and revision ID',
 506                                 ' title          - Adds the title and namespace ID of the page',
 507                                 ' timestamp      - Adds the timestamp of the edit',
 508                                 ' comment        - Adds the comment of the edit',
 509                                 ' parsedcomment  - Adds the parsed comment of the edit',
 510                                 ' size           - Adds the new size of the edit',
 511                                 ' sizediff       - Adds the size delta of the edit against its parent',
 512                                 ' flags          - Adds flags of the edit',
 513                                 ' patrolled      - Tags patrolled edits',
 514                                 ' tags           - Lists tags for the edit',
 515                         ),
 516                         'show' => array(
 517                                 "Show only items that meet thse criteria, e.g. non minor edits only: {$p}show=!minor",
 518                                 "NOTE: If {$p}show=patrolled or {$p}show=!patrolled is set, revisions older than",
 519                                 "\$wgRCMaxAge ($wgRCMaxAge) won't be shown",
 520                         ),
 521                         'tag' => 'Only list revisions tagged with this tag',
 522                         'toponly' => 'Only list changes which are the latest revision',
 523                 );
 524         }
 525
 526         public function getResultProperties() {
 527                 return array(
 528                         '' => array(
 529                                 'userid' => 'integer',
 530                                 'user' => 'string',
 531                                 'userhidden' => 'boolean'
 532                         ),
 533                         'ids' => array(
 534                                 'pageid' => 'integer',
 535                                 'revid' => 'integer',
 536                                 'parentid' => array(
 537                                         ApiBase::PROP_TYPE => 'integer',
 538                                         ApiBase::PROP_NULLABLE => true
 539                                 )
 540                         ),
 541                         'title' => array(
 542                                 'ns' => 'namespace',
 543                                 'title' => 'string'
 544                         ),
 545                         'timestamp' => array(
 546                                 'timestamp' => 'timestamp'
 547                         ),
 548                         'flags' => array(
 549                                 'new' => 'boolean',
 550                                 'minor' => 'boolean',
 551                                 'top' => 'boolean'
 552                         ),
 553                         'comment' => array(
 554                                 'commenthidden' => 'boolean',
 555                                 'comment' => array(
 556                                         ApiBase::PROP_TYPE => 'string',
 557                                         ApiBase::PROP_NULLABLE => true
 558                                 )
 559                         ),
 560                         'parsedcomment' => array(
 561                                 'commenthidden' => 'boolean',
 562                                 'parsedcomment' => array(
 563                                         ApiBase::PROP_TYPE => 'string',
 564                                         ApiBase::PROP_NULLABLE => true
 565                                 )
 566                         ),
 567                         'patrolled' => array(
 568                                 'patrolled' => 'boolean'
 569                         ),
 570                         'size' => array(
 571                                 'size' => array(
 572                                         ApiBase::PROP_TYPE => 'integer',
 573                                         ApiBase::PROP_NULLABLE => true
 574                                 )
 575                         ),
 576                         'sizediff' => array(
 577                                 'sizediff' => array(
 578                                         ApiBase::PROP_TYPE => 'integer',
 579                                         ApiBase::PROP_NULLABLE => true
 580                                 )
 581                         )
 582                 );
 583         }
 584
 585         public function getDescription() {
 586                 return 'Get all edits by a user';
 587         }
 588
 589         public function getPossibleErrors() {
 590                 return array_merge( parent::getPossibleErrors(), array(
 591                         array( 'code' => 'param_user', 'info' => 'User parameter may not be empty.' ),
 592                         array( 'code' => 'param_user', 'info' => 'User name user is not valid' ),
 593                         array( 'show' ),
 594                         array(
 595                                 'code' => 'permissiondenied',
 596                                 'info' => 'You need the patrol right to request the patrolled flag'
 597                         ),
 598                 ) );
 599         }
 600
 601         public function getExamples() {
 602                 return array(
 603                         'api.php?action=query&list=usercontribs&ucuser=YurikBot',
 604                         'api.php?action=query&list=usercontribs&ucuserprefix=217.121.114.',
 605                 );
 606         }
 607
 608         public function getHelpUrls() {
 609                 return 'https://www.mediawiki.org/wiki/API:Usercontribs';
 610         }
 611 }