includes/api/ApiQueryDeletedrevs.php

   1 <?php
   2 /**
   3  * Copyright © 2007 Roan Kattouw "<Firstname>.<Lastname>@gmail.com"
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 2 of the License, or
   8  * (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License along
  16  * with this program; if not, write to the Free Software Foundation, Inc.,
  17  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  18  * http://www.gnu.org/copyleft/gpl.html
  19  *
  20  * @file
  21  */
  22
  23 /**
  24  * Query module to enumerate all deleted revisions.
  25  *
  26  * @ingroup API
  27  * @deprecated since 1.25
  28  */
  29 class ApiQueryDeletedrevs extends ApiQueryBase {
  30
  31         public function __construct( ApiQuery $query, $moduleName ) {
  32                 parent::__construct( $query, $moduleName, 'dr' );
  33         }
  34
  35         public function execute() {
  36                 // Before doing anything at all, let's check permissions
  37                 $this->checkUserRightsAny( 'deletedhistory' );
  38
  39                 $this->addDeprecation( 'apiwarn-deprecation-deletedrevs', 'action=query&list=deletedrevs' );
  40
  41                 $user = $this->getUser();
  42                 $db = $this->getDB();
  43                 $commentStore = CommentStore::getStore();
  44                 $params = $this->extractRequestParams( false );
  45                 $prop = array_flip( $params['prop'] );
  46                 $fld_parentid = isset( $prop['parentid'] );
  47                 $fld_revid = isset( $prop['revid'] );
  48                 $fld_user = isset( $prop['user'] );
  49                 $fld_userid = isset( $prop['userid'] );
  50                 $fld_comment = isset( $prop['comment'] );
  51                 $fld_parsedcomment = isset( $prop['parsedcomment'] );
  52                 $fld_minor = isset( $prop['minor'] );
  53                 $fld_len = isset( $prop['len'] );
  54                 $fld_sha1 = isset( $prop['sha1'] );
  55                 $fld_content = isset( $prop['content'] );
  56                 $fld_token = isset( $prop['token'] );
  57                 $fld_tags = isset( $prop['tags'] );
  58
  59                 if ( isset( $prop['token'] ) ) {
  60                         $p = $this->getModulePrefix();
  61                 }
  62
  63                 // If we're in a mode that breaks the same-origin policy, no tokens can
  64                 // be obtained
  65                 if ( $this->lacksSameOriginSecurity() ) {
  66                         $fld_token = false;
  67                 }
  68
  69                 // If user can't undelete, no tokens
  70                 if ( !$user->isAllowed( 'undelete' ) ) {
  71                         $fld_token = false;
  72                 }
  73
  74                 $result = $this->getResult();
  75                 $pageSet = $this->getPageSet();
  76                 $titles = $pageSet->getTitles();
  77
  78                 // This module operates in three modes:
  79                 // 'revs': List deleted revs for certain titles (1)
  80                 // 'user': List deleted revs by a certain user (2)
  81                 // 'all': List all deleted revs in NS (3)
  82                 $mode = 'all';
  83                 if ( count( $titles ) > 0 ) {
  84                         $mode = 'revs';
  85                 } elseif ( !is_null( $params['user'] ) ) {
  86                         $mode = 'user';
  87                 }
  88
  89                 if ( $mode == 'revs' || $mode == 'user' ) {
  90                         // Ignore namespace and unique due to inability to know whether they were purposely set
  91                         foreach ( [ 'from', 'to', 'prefix', /*'namespace', 'unique'*/ ] as $p ) {
  92                                 if ( !is_null( $params[$p] ) ) {
  93                                         $this->dieWithError( [ 'apierror-deletedrevs-param-not-1-2', $p ], 'badparams' );
  94                                 }
  95                         }
  96                 } else {
  97                         foreach ( [ 'start', 'end' ] as $p ) {
  98                                 if ( !is_null( $params[$p] ) ) {
  99                                         $this->dieWithError( [ 'apierror-deletedrevs-param-not-3', $p ], 'badparams' );
 100                                 }
 101                         }
 102                 }
 103
 104                 if ( !is_null( $params['user'] ) && !is_null( $params['excludeuser'] ) ) {
 105                         $this->dieWithError( 'user and excludeuser cannot be used together', 'badparams' );
 106                 }
 107
 108                 $this->addTables( 'archive' );
 109                 $this->addFields( [ 'ar_title', 'ar_namespace', 'ar_timestamp', 'ar_deleted', 'ar_id' ] );
 110
 111                 $this->addFieldsIf( 'ar_parent_id', $fld_parentid );
 112                 $this->addFieldsIf( 'ar_rev_id', $fld_revid );
 113                 if ( $fld_user || $fld_userid ) {
 114                         $actorQuery = ActorMigration::newMigration()->getJoin( 'ar_user' );
 115                         $this->addTables( $actorQuery['tables'] );
 116                         $this->addFields( $actorQuery['fields'] );
 117                         $this->addJoinConds( $actorQuery['joins'] );
 118                 }
 119                 $this->addFieldsIf( 'ar_minor_edit', $fld_minor );
 120                 $this->addFieldsIf( 'ar_len', $fld_len );
 121                 $this->addFieldsIf( 'ar_sha1', $fld_sha1 );
 122
 123                 if ( $fld_comment || $fld_parsedcomment ) {
 124                         $commentQuery = $commentStore->getJoin( 'ar_comment' );
 125                         $this->addTables( $commentQuery['tables'] );
 126                         $this->addFields( $commentQuery['fields'] );
 127                         $this->addJoinConds( $commentQuery['joins'] );
 128                 }
 129
 130                 if ( $fld_tags ) {
 131                         $this->addTables( 'tag_summary' );
 132                         $this->addJoinConds(
 133                                 [ 'tag_summary' => [ 'LEFT JOIN', [ 'ar_rev_id=ts_rev_id' ] ] ]
 134                         );
 135                         $this->addFields( 'ts_tags' );
 136                 }
 137
 138                 if ( !is_null( $params['tag'] ) ) {
 139                         $this->addTables( 'change_tag' );
 140                         $this->addJoinConds(
 141                                 [ 'change_tag' => [ 'INNER JOIN', [ 'ar_rev_id=ct_rev_id' ] ] ]
 142                         );
 143                         $this->addWhereFld( 'ct_tag', $params['tag'] );
 144                 }
 145
 146                 if ( $fld_content ) {
 147                         // Modern MediaWiki has the content for deleted revs in the 'text'
 148                         // table using fields old_text and old_flags. But revisions deleted
 149                         // pre-1.5 store the content in the 'archive' table directly using
 150                         // fields ar_text and ar_flags, and no corresponding 'text' row. So
 151                         // we have to LEFT JOIN and fetch all four fields, plus ar_text_id
 152                         // to be able to tell the difference.
 153                         $this->addTables( 'text' );
 154                         $this->addJoinConds(
 155                                 [ 'text' => [ 'LEFT JOIN', [ 'ar_text_id=old_id' ] ] ]
 156                         );
 157                         $this->addFields( [ 'ar_text', 'ar_flags', 'ar_text_id', 'old_text', 'old_flags' ] );
 158
 159                         // This also means stricter restrictions
 160                         $this->checkUserRightsAny( [ 'deletedtext', 'undelete' ] );
 161                 }
 162                 // Check limits
 163                 $userMax = $fld_content ? ApiBase::LIMIT_SML1 : ApiBase::LIMIT_BIG1;
 164                 $botMax = $fld_content ? ApiBase::LIMIT_SML2 : ApiBase::LIMIT_BIG2;
 165
 166                 $limit = $params['limit'];
 167
 168                 if ( $limit == 'max' ) {
 169                         $limit = $this->getMain()->canApiHighLimits() ? $botMax : $userMax;
 170                         $this->getResult()->addParsedLimit( $this->getModuleName(), $limit );
 171                 }
 172
 173                 $this->validateLimit( 'limit', $limit, 1, $userMax, $botMax );
 174
 175                 if ( $fld_token ) {
 176                         // Undelete tokens are identical for all pages, so we cache one here
 177                         $token = $user->getEditToken( '', $this->getMain()->getRequest() );
 178                 }
 179
 180                 $dir = $params['dir'];
 181
 182                 // We need a custom WHERE clause that matches all titles.
 183                 if ( $mode == 'revs' ) {
 184                         $lb = new LinkBatch( $titles );
 185                         $where = $lb->constructSet( 'ar', $db );
 186                         $this->addWhere( $where );
 187                 } elseif ( $mode == 'all' ) {
 188                         $this->addWhereFld( 'ar_namespace', $params['namespace'] );
 189
 190                         $from = $params['from'] === null
 191                                 ? null
 192                                 : $this->titlePartToKey( $params['from'], $params['namespace'] );
 193                         $to = $params['to'] === null
 194                                 ? null
 195                                 : $this->titlePartToKey( $params['to'], $params['namespace'] );
 196                         $this->addWhereRange( 'ar_title', $dir, $from, $to );
 197
 198                         if ( isset( $params['prefix'] ) ) {
 199                                 $this->addWhere( 'ar_title' . $db->buildLike(
 200                                         $this->titlePartToKey( $params['prefix'], $params['namespace'] ),
 201                                         $db->anyString() ) );
 202                         }
 203                 }
 204
 205                 if ( !is_null( $params['user'] ) ) {
 206                         // Don't query by user ID here, it might be able to use the ar_usertext_timestamp index.
 207                         $actorQuery = ActorMigration::newMigration()
 208                                 ->getWhere( $db, 'ar_user', User::newFromName( $params['user'], false ), false );
 209                         $this->addTables( $actorQuery['tables'] );
 210                         $this->addJoinConds( $actorQuery['joins'] );
 211                         $this->addWhere( $actorQuery['conds'] );
 212                 } elseif ( !is_null( $params['excludeuser'] ) ) {
 213                         // Here there's no chance of using ar_usertext_timestamp.
 214                         $actorQuery = ActorMigration::newMigration()
 215                                 ->getWhere( $db, 'ar_user', User::newFromName( $params['excludeuser'], false ) );
 216                         $this->addTables( $actorQuery['tables'] );
 217                         $this->addJoinConds( $actorQuery['joins'] );
 218                         $this->addWhere( 'NOT(' . $actorQuery['conds'] . ')' );
 219                 }
 220
 221                 if ( !is_null( $params['user'] ) || !is_null( $params['excludeuser'] ) ) {
 222                         // Paranoia: avoid brute force searches (T19342)
 223                         // (shouldn't be able to get here without 'deletedhistory', but
 224                         // check it again just in case)
 225                         if ( !$user->isAllowed( 'deletedhistory' ) ) {
 226                                 $bitmask = Revision::DELETED_USER;
 227                         } elseif ( !$user->isAllowedAny( 'suppressrevision', 'viewsuppressed' ) ) {
 228                                 $bitmask = Revision::DELETED_USER | Revision::DELETED_RESTRICTED;
 229                         } else {
 230                                 $bitmask = 0;
 231                         }
 232                         if ( $bitmask ) {
 233                                 $this->addWhere( $db->bitAnd( 'ar_deleted', $bitmask ) . " != $bitmask" );
 234                         }
 235                 }
 236
 237                 if ( !is_null( $params['continue'] ) ) {
 238                         $cont = explode( '|', $params['continue'] );
 239                         $op = ( $dir == 'newer' ? '>' : '<' );
 240                         if ( $mode == 'all' || $mode == 'revs' ) {
 241                                 $this->dieContinueUsageIf( count( $cont ) != 4 );
 242                                 $ns = intval( $cont[0] );
 243                                 $this->dieContinueUsageIf( strval( $ns ) !== $cont[0] );
 244                                 $title = $db->addQuotes( $cont[1] );
 245                                 $ts = $db->addQuotes( $db->timestamp( $cont[2] ) );
 246                                 $ar_id = (int)$cont[3];
 247                                 $this->dieContinueUsageIf( strval( $ar_id ) !== $cont[3] );
 248                                 $this->addWhere( "ar_namespace $op $ns OR " .
 249                                         "(ar_namespace = $ns AND " .
 250                                         "(ar_title $op $title OR " .
 251                                         "(ar_title = $title AND " .
 252                                         "(ar_timestamp $op $ts OR " .
 253                                         "(ar_timestamp = $ts AND " .
 254                                         "ar_id $op= $ar_id)))))" );
 255                         } else {
 256                                 $this->dieContinueUsageIf( count( $cont ) != 2 );
 257                                 $ts = $db->addQuotes( $db->timestamp( $cont[0] ) );
 258                                 $ar_id = (int)$cont[1];
 259                                 $this->dieContinueUsageIf( strval( $ar_id ) !== $cont[1] );
 260                                 $this->addWhere( "ar_timestamp $op $ts OR " .
 261                                         "(ar_timestamp = $ts AND " .
 262                                         "ar_id $op= $ar_id)" );
 263                         }
 264                 }
 265
 266                 $this->addOption( 'LIMIT', $limit + 1 );
 267                 if ( $mode == 'all' ) {
 268                         if ( $params['unique'] ) {
 269                                 // @todo Does this work on non-MySQL?
 270                                 $this->addOption( 'GROUP BY', 'ar_title' );
 271                         } else {
 272                                 $sort = ( $dir == 'newer' ? '' : ' DESC' );
 273                                 $this->addOption( 'ORDER BY', [
 274                                         'ar_title' . $sort,
 275                                         'ar_timestamp' . $sort,
 276                                         'ar_id' . $sort,
 277                                 ] );
 278                         }
 279                 } else {
 280                         if ( $mode == 'revs' ) {
 281                                 // Sort by ns and title in the same order as timestamp for efficiency
 282                                 $this->addWhereRange( 'ar_namespace', $dir, null, null );
 283                                 $this->addWhereRange( 'ar_title', $dir, null, null );
 284                         }
 285                         $this->addTimestampWhereRange( 'ar_timestamp', $dir, $params['start'], $params['end'] );
 286                         // Include in ORDER BY for uniqueness
 287                         $this->addWhereRange( 'ar_id', $dir, null, null );
 288                 }
 289                 $res = $this->select( __METHOD__ );
 290                 $pageMap = []; // Maps ns&title to (fake) pageid
 291                 $count = 0;
 292                 $newPageID = 0;
 293                 foreach ( $res as $row ) {
 294                         if ( ++$count > $limit ) {
 295                                 // We've had enough
 296                                 if ( $mode == 'all' || $mode == 'revs' ) {
 297                                         $this->setContinueEnumParameter( 'continue',
 298                                                 "$row->ar_namespace|$row->ar_title|$row->ar_timestamp|$row->ar_id"
 299                                         );
 300                                 } else {
 301                                         $this->setContinueEnumParameter( 'continue', "$row->ar_timestamp|$row->ar_id" );
 302                                 }
 303                                 break;
 304                         }
 305
 306                         $rev = [];
 307                         $anyHidden = false;
 308
 309                         $rev['timestamp'] = wfTimestamp( TS_ISO_8601, $row->ar_timestamp );
 310                         if ( $fld_revid ) {
 311                                 $rev['revid'] = intval( $row->ar_rev_id );
 312                         }
 313                         if ( $fld_parentid && !is_null( $row->ar_parent_id ) ) {
 314                                 $rev['parentid'] = intval( $row->ar_parent_id );
 315                         }
 316                         if ( $fld_user || $fld_userid ) {
 317                                 if ( $row->ar_deleted & Revision::DELETED_USER ) {
 318                                         $rev['userhidden'] = true;
 319                                         $anyHidden = true;
 320                                 }
 321                                 if ( Revision::userCanBitfield( $row->ar_deleted, Revision::DELETED_USER, $user ) ) {
 322                                         if ( $fld_user ) {
 323                                                 $rev['user'] = $row->ar_user_text;
 324                                         }
 325                                         if ( $fld_userid ) {
 326                                                 $rev['userid'] = (int)$row->ar_user;
 327                                         }
 328                                 }
 329                         }
 330
 331                         if ( $fld_comment || $fld_parsedcomment ) {
 332                                 if ( $row->ar_deleted & Revision::DELETED_COMMENT ) {
 333                                         $rev['commenthidden'] = true;
 334                                         $anyHidden = true;
 335                                 }
 336                                 if ( Revision::userCanBitfield( $row->ar_deleted, Revision::DELETED_COMMENT, $user ) ) {
 337                                         $comment = $commentStore->getComment( 'ar_comment', $row )->text;
 338                                         if ( $fld_comment ) {
 339                                                 $rev['comment'] = $comment;
 340                                         }
 341                                         if ( $fld_parsedcomment ) {
 342                                                 $title = Title::makeTitle( $row->ar_namespace, $row->ar_title );
 343                                                 $rev['parsedcomment'] = Linker::formatComment( $comment, $title );
 344                                         }
 345                                 }
 346                         }
 347
 348                         if ( $fld_minor ) {
 349                                 $rev['minor'] = $row->ar_minor_edit == 1;
 350                         }
 351                         if ( $fld_len ) {
 352                                 $rev['len'] = $row->ar_len;
 353                         }
 354                         if ( $fld_sha1 ) {
 355                                 if ( $row->ar_deleted & Revision::DELETED_TEXT ) {
 356                                         $rev['sha1hidden'] = true;
 357                                         $anyHidden = true;
 358                                 }
 359                                 if ( Revision::userCanBitfield( $row->ar_deleted, Revision::DELETED_TEXT, $user ) ) {
 360                                         if ( $row->ar_sha1 != '' ) {
 361                                                 $rev['sha1'] = Wikimedia\base_convert( $row->ar_sha1, 36, 16, 40 );
 362                                         } else {
 363                                                 $rev['sha1'] = '';
 364                                         }
 365                                 }
 366                         }
 367                         if ( $fld_content ) {
 368                                 if ( $row->ar_deleted & Revision::DELETED_TEXT ) {
 369                                         $rev['texthidden'] = true;
 370                                         $anyHidden = true;
 371                                 }
 372                                 if ( Revision::userCanBitfield( $row->ar_deleted, Revision::DELETED_TEXT, $user ) ) {
 373                                         if ( isset( $row->ar_text ) && !$row->ar_text_id ) {
 374                                                 // Pre-1.5 ar_text row (if condition from Revision::newFromArchiveRow)
 375                                                 ApiResult::setContentValue( $rev, 'text', Revision::getRevisionText( $row, 'ar_' ) );
 376                                         } else {
 377                                                 ApiResult::setContentValue( $rev, 'text', Revision::getRevisionText( $row ) );
 378                                         }
 379                                 }
 380                         }
 381
 382                         if ( $fld_tags ) {
 383                                 if ( $row->ts_tags ) {
 384                                         $tags = explode( ',', $row->ts_tags );
 385                                         ApiResult::setIndexedTagName( $tags, 'tag' );
 386                                         $rev['tags'] = $tags;
 387                                 } else {
 388                                         $rev['tags'] = [];
 389                                 }
 390                         }
 391
 392                         if ( $anyHidden && ( $row->ar_deleted & Revision::DELETED_RESTRICTED ) ) {
 393                                 $rev['suppressed'] = true;
 394                         }
 395
 396                         if ( !isset( $pageMap[$row->ar_namespace][$row->ar_title] ) ) {
 397                                 $pageID = $newPageID++;
 398                                 $pageMap[$row->ar_namespace][$row->ar_title] = $pageID;
 399                                 $a['revisions'] = [ $rev ];
 400                                 ApiResult::setIndexedTagName( $a['revisions'], 'rev' );
 401                                 $title = Title::makeTitle( $row->ar_namespace, $row->ar_title );
 402                                 ApiQueryBase::addTitleInfo( $a, $title );
 403                                 if ( $fld_token ) {
 404                                         $a['token'] = $token;
 405                                 }
 406                                 $fit = $result->addValue( [ 'query', $this->getModuleName() ], $pageID, $a );
 407                         } else {
 408                                 $pageID = $pageMap[$row->ar_namespace][$row->ar_title];
 409                                 $fit = $result->addValue(
 410                                         [ 'query', $this->getModuleName(), $pageID, 'revisions' ],
 411                                         null, $rev );
 412                         }
 413                         if ( !$fit ) {
 414                                 if ( $mode == 'all' || $mode == 'revs' ) {
 415                                         $this->setContinueEnumParameter( 'continue',
 416                                                 "$row->ar_namespace|$row->ar_title|$row->ar_timestamp|$row->ar_id"
 417                                         );
 418                                 } else {
 419                                         $this->setContinueEnumParameter( 'continue', "$row->ar_timestamp|$row->ar_id" );
 420                                 }
 421                                 break;
 422                         }
 423                 }
 424                 $result->addIndexedTagName( [ 'query', $this->getModuleName() ], 'page' );
 425         }
 426
 427         public function isDeprecated() {
 428                 return true;
 429         }
 430
 431         public function getAllowedParams() {
 432                 return [
 433                         'start' => [
 434                                 ApiBase::PARAM_TYPE => 'timestamp',
 435                                 ApiBase::PARAM_HELP_MSG_INFO => [ [ 'modes', 1, 2 ] ],
 436                         ],
 437                         'end' => [
 438                                 ApiBase::PARAM_TYPE => 'timestamp',
 439                                 ApiBase::PARAM_HELP_MSG_INFO => [ [ 'modes', 1, 2 ] ],
 440                         ],
 441                         'dir' => [
 442                                 ApiBase::PARAM_TYPE => [
 443                                         'newer',
 444                                         'older'
 445                                 ],
 446                                 ApiBase::PARAM_DFLT => 'older',
 447                                 ApiBase::PARAM_HELP_MSG => 'api-help-param-direction',
 448                                 ApiBase::PARAM_HELP_MSG_INFO => [ [ 'modes', 1, 3 ] ],
 449                         ],
 450                         'from' => [
 451                                 ApiBase::PARAM_HELP_MSG_INFO => [ [ 'modes', 3 ] ],
 452                         ],
 453                         'to' => [
 454                                 ApiBase::PARAM_HELP_MSG_INFO => [ [ 'modes', 3 ] ],
 455                         ],
 456                         'prefix' => [
 457                                 ApiBase::PARAM_HELP_MSG_INFO => [ [ 'modes', 3 ] ],
 458                         ],
 459                         'unique' => [
 460                                 ApiBase::PARAM_DFLT => false,
 461                                 ApiBase::PARAM_HELP_MSG_INFO => [ [ 'modes', 3 ] ],
 462                         ],
 463                         'namespace' => [
 464                                 ApiBase::PARAM_TYPE => 'namespace',
 465                                 ApiBase::PARAM_DFLT => NS_MAIN,
 466                                 ApiBase::PARAM_HELP_MSG_INFO => [ [ 'modes', 3 ] ],
 467                         ],
 468                         'tag' => null,
 469                         'user' => [
 470                                 ApiBase::PARAM_TYPE => 'user'
 471                         ],
 472                         'excludeuser' => [
 473                                 ApiBase::PARAM_TYPE => 'user'
 474                         ],
 475                         'prop' => [
 476                                 ApiBase::PARAM_DFLT => 'user|comment',
 477                                 ApiBase::PARAM_TYPE => [
 478                                         'revid',
 479                                         'parentid',
 480                                         'user',
 481                                         'userid',
 482                                         'comment',
 483                                         'parsedcomment',
 484                                         'minor',
 485                                         'len',
 486                                         'sha1',
 487                                         'content',
 488                                         'token',
 489                                         'tags'
 490                                 ],
 491                                 ApiBase::PARAM_ISMULTI => true
 492                         ],
 493                         'limit' => [
 494                                 ApiBase::PARAM_DFLT => 10,
 495                                 ApiBase::PARAM_TYPE => 'limit',
 496                                 ApiBase::PARAM_MIN => 1,
 497                                 ApiBase::PARAM_MAX => ApiBase::LIMIT_BIG1,
 498                                 ApiBase::PARAM_MAX2 => ApiBase::LIMIT_BIG2
 499                         ],
 500                         'continue' => [
 501                                 ApiBase::PARAM_HELP_MSG => 'api-help-param-continue',
 502                         ],
 503                 ];
 504         }
 505
 506         protected function getExamplesMessages() {
 507                 return [
 508                         'action=query&list=deletedrevs&titles=Main%20Page|Talk:Main%20Page&' .
 509                                 'drprop=user|comment|content'
 510                                 => 'apihelp-query+deletedrevs-example-mode1',
 511                         'action=query&list=deletedrevs&druser=Bob&drlimit=50'
 512                                 => 'apihelp-query+deletedrevs-example-mode2',
 513                         'action=query&list=deletedrevs&drdir=newer&drlimit=50'
 514                                 => 'apihelp-query+deletedrevs-example-mode3-main',
 515                         'action=query&list=deletedrevs&drdir=newer&drlimit=50&drnamespace=1&drunique='
 516                                 => 'apihelp-query+deletedrevs-example-mode3-talk',
 517                 ];
 518         }
 519
 520         public function getHelpUrls() {
 521                 return 'https://www.mediawiki.org/wiki/Special:MyLanguage/API:Deletedrevs';
 522         }
 523 }