includes/api/ApiQueryUserContribs.php

   1 <?php
   2 /**
   3  * Copyright © 2006 Yuri Astrakhan "<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  * This query action adds a list of a specified user's contributions to the output.
  25  *
  26  * @ingroup API
  27  */
  28 class ApiQueryUserContribs extends ApiQueryBase {
  29
  30         public function __construct( ApiQuery $query, $moduleName ) {
  31                 parent::__construct( $query, $moduleName, 'uc' );
  32         }
  33
  34         private $params, $multiUserMode, $orderBy, $parentLens, $commentStore;
  35
  36         private $fld_ids = false, $fld_title = false, $fld_timestamp = false,
  37                 $fld_comment = false, $fld_parsedcomment = false, $fld_flags = false,
  38                 $fld_patrolled = false, $fld_tags = false, $fld_size = false, $fld_sizediff = false;
  39
  40         public function execute() {
  41                 global $wgActorTableSchemaMigrationStage;
  42
  43                 // Parse some parameters
  44                 $this->params = $this->extractRequestParams();
  45
  46                 $this->commentStore = CommentStore::getStore();
  47
  48                 $prop = array_flip( $this->params['prop'] );
  49                 $this->fld_ids = isset( $prop['ids'] );
  50                 $this->fld_title = isset( $prop['title'] );
  51                 $this->fld_comment = isset( $prop['comment'] );
  52                 $this->fld_parsedcomment = isset( $prop['parsedcomment'] );
  53                 $this->fld_size = isset( $prop['size'] );
  54                 $this->fld_sizediff = isset( $prop['sizediff'] );
  55                 $this->fld_flags = isset( $prop['flags'] );
  56                 $this->fld_timestamp = isset( $prop['timestamp'] );
  57                 $this->fld_patrolled = isset( $prop['patrolled'] );
  58                 $this->fld_tags = isset( $prop['tags'] );
  59
  60                 // Most of this code will use the 'contributions' group DB, which can map to replica DBs
  61                 // with extra user based indexes or partioning by user. The additional metadata
  62                 // queries should use a regular replica DB since the lookup pattern is not all by user.
  63                 $dbSecondary = $this->getDB(); // any random replica DB
  64
  65                 // TODO: if the query is going only against the revision table, should this be done?
  66                 $this->selectNamedDB( 'contributions', DB_REPLICA, 'contributions' );
  67
  68                 $sort = ( $this->params['dir'] == 'newer' ? '' : ' DESC' );
  69                 $op = ( $this->params['dir'] == 'older' ? '<' : '>' );
  70
  71                 // Create an Iterator that produces the UserIdentity objects we need, depending
  72                 // on which of the 'userprefix', 'userids', or 'user' params was
  73                 // specified.
  74                 $this->requireOnlyOneParameter( $this->params, 'userprefix', 'userids', 'user' );
  75                 if ( isset( $this->params['userprefix'] ) ) {
  76                         $this->multiUserMode = true;
  77                         $this->orderBy = 'name';
  78                         $fname = __METHOD__;
  79
  80                         // Because 'userprefix' might produce a huge number of users (e.g.
  81                         // a wiki with users "Test00000001" to "Test99999999"), use a
  82                         // generator with batched lookup and continuation.
  83                         $userIter = call_user_func( function () use ( $dbSecondary, $sort, $op, $fname ) {
  84                                 global $wgActorTableSchemaMigrationStage;
  85
  86                                 $fromName = false;
  87                                 if ( !is_null( $this->params['continue'] ) ) {
  88                                         $continue = explode( '|', $this->params['continue'] );
  89                                         $this->dieContinueUsageIf( count( $continue ) != 4 );
  90                                         $this->dieContinueUsageIf( $continue[0] !== 'name' );
  91                                         $fromName = $continue[1];
  92                                 }
  93                                 $like = $dbSecondary->buildLike( $this->params['userprefix'], $dbSecondary->anyString() );
  94
  95                                 $limit = 501;
  96
  97                                 do {
  98                                         $from = $fromName ? "$op= " . $dbSecondary->addQuotes( $fromName ) : false;
  99
 100                                         // For the new schema, pull from the actor table. For the
 101                                         // old, pull from rev_user. For migration a FULL [OUTER]
 102                                         // JOIN would be what we want, except MySQL doesn't support
 103                                         // that so we have to UNION instead.
 104                                         if ( $wgActorTableSchemaMigrationStage === MIGRATION_NEW ) {
 105                                                 $res = $dbSecondary->select(
 106                                                         'actor',
 107                                                         [ 'actor_id', 'user_id' => 'COALESCE(actor_user,0)', 'user_name' => 'actor_name' ],
 108                                                         array_merge( [ "actor_name$like" ], $from ? [ "actor_name $from" ] : [] ),
 109                                                         $fname,
 110                                                         [ 'ORDER BY' => [ "user_name $sort" ], 'LIMIT' => $limit ]
 111                                                 );
 112                                         } elseif ( $wgActorTableSchemaMigrationStage === MIGRATION_OLD ) {
 113                                                 $res = $dbSecondary->select(
 114                                                         'revision',
 115                                                         [ 'actor_id' => 'NULL', 'user_id' => 'rev_user', 'user_name' => 'rev_user_text' ],
 116                                                         array_merge( [ "rev_user_text$like" ], $from ? [ "rev_user_text $from" ] : [] ),
 117                                                         $fname,
 118                                                         [ 'DISTINCT', 'ORDER BY' => [ "rev_user_text $sort" ], 'LIMIT' => $limit ]
 119                                                 );
 120                                         } else {
 121                                                 // There are three queries we have to combine to be sure of getting all results:
 122                                                 //  - actor table (any rows that have been migrated will have empty rev_user_text)
 123                                                 //  - revision+actor by user id
 124                                                 //  - revision+actor by name for anons
 125                                                 $options = $dbSecondary->unionSupportsOrderAndLimit()
 126                                                         ? [ 'ORDER BY' => [ "user_name $sort" ], 'LIMIT' => $limit ] : [];
 127                                                 $subsql = [];
 128                                                 $subsql[] = $dbSecondary->selectSQLText(
 129                                                         'actor',
 130                                                         [ 'actor_id', 'user_id' => 'COALESCE(actor_user,0)', 'user_name' => 'actor_name' ],
 131                                                         array_merge( [ "actor_name$like" ], $from ? [ "actor_name $from" ] : [] ),
 132                                                         $fname,
 133                                                         $options
 134                                                 );
 135                                                 $subsql[] = $dbSecondary->selectSQLText(
 136                                                         [ 'revision', 'actor' ],
 137                                                         [ 'actor_id', 'user_id' => 'rev_user', 'user_name' => 'rev_user_text' ],
 138                                                         array_merge(
 139                                                                 [ "rev_user_text$like", 'rev_user != 0' ],
 140                                                                 $from ? [ "rev_user_text $from" ] : []
 141                                                         ),
 142                                                         $fname,
 143                                                         array_merge( [ 'DISTINCT' ], $options ),
 144                                                         [ 'actor' => [ 'LEFT JOIN', 'rev_user = actor_user' ] ]
 145                                                 );
 146                                                 $subsql[] = $dbSecondary->selectSQLText(
 147                                                         [ 'revision', 'actor' ],
 148                                                         [ 'actor_id', 'user_id' => 'rev_user', 'user_name' => 'rev_user_text' ],
 149                                                         array_merge(
 150                                                                 [ "rev_user_text$like", 'rev_user = 0' ],
 151                                                                 $from ? [ "rev_user_text $from" ] : []
 152                                                         ),
 153                                                         $fname,
 154                                                         array_merge( [ 'DISTINCT' ], $options ),
 155                                                         [ 'actor' => [ 'LEFT JOIN', 'rev_user_text = actor_name' ] ]
 156                                                 );
 157                                                 $sql = $dbSecondary->unionQueries( $subsql, false ) . " ORDER BY user_name $sort";
 158                                                 $sql = $dbSecondary->limitResult( $sql, $limit );
 159                                                 $res = $dbSecondary->query( $sql, $fname );
 160                                         }
 161
 162                                         $count = 0;
 163                                         $fromName = false;
 164                                         foreach ( $res as $row ) {
 165                                                 if ( ++$count >= $limit ) {
 166                                                         $fromName = $row->user_name;
 167                                                         break;
 168                                                 }
 169                                                 yield User::newFromRow( $row );
 170                                         }
 171                                 } while ( $fromName !== false );
 172                         } );
 173                         // Do the actual sorting client-side, because otherwise
 174                         // prepareQuery might try to sort by actor and confuse everything.
 175                         $batchSize = 1;
 176                 } elseif ( isset( $this->params['userids'] ) ) {
 177                         if ( !count( $this->params['userids'] ) ) {
 178                                 $encParamName = $this->encodeParamName( 'userids' );
 179                                 $this->dieWithError( [ 'apierror-paramempty', $encParamName ], "paramempty_$encParamName" );
 180                         }
 181
 182                         $ids = [];
 183                         foreach ( $this->params['userids'] as $uid ) {
 184                                 if ( $uid <= 0 ) {
 185                                         $this->dieWithError( [ 'apierror-invaliduserid', $uid ], 'invaliduserid' );
 186                                 }
 187                                 $ids[] = $uid;
 188                         }
 189
 190                         $this->orderBy = 'id';
 191                         $this->multiUserMode = count( $ids ) > 1;
 192
 193                         $from = $fromId = false;
 194                         if ( $this->multiUserMode && !is_null( $this->params['continue'] ) ) {
 195                                 $continue = explode( '|', $this->params['continue'] );
 196                                 $this->dieContinueUsageIf( count( $continue ) != 4 );
 197                                 $this->dieContinueUsageIf( $continue[0] !== 'id' && $continue[0] !== 'actor' );
 198                                 $fromId = (int)$continue[1];
 199                                 $this->dieContinueUsageIf( $continue[1] !== (string)$fromId );
 200                                 $from = "$op= $fromId";
 201                         }
 202
 203                         // For the new schema, just select from the actor table. For the
 204                         // old and transitional schemas, select from user and left join
 205                         // actor if it exists.
 206                         if ( $wgActorTableSchemaMigrationStage === MIGRATION_NEW ) {
 207                                 $res = $dbSecondary->select(
 208                                         'actor',
 209                                         [ 'actor_id', 'user_id' => 'actor_user', 'user_name' => 'actor_name' ],
 210                                         array_merge( [ 'actor_user' => $ids ], $from ? [ "actor_id $from" ] : [] ),
 211                                         __METHOD__,
 212                                         [ 'ORDER BY' => "user_id $sort" ]
 213                                 );
 214                         } elseif ( $wgActorTableSchemaMigrationStage === MIGRATION_OLD ) {
 215                                 $res = $dbSecondary->select(
 216                                         'user',
 217                                         [ 'actor_id' => 'NULL', 'user_id' => 'user_id', 'user_name' => 'user_name' ],
 218                                         array_merge( [ 'user_id' => $ids ], $from ? [ "user_id $from" ] : [] ),
 219                                         __METHOD__,
 220                                         [ 'ORDER BY' => "user_id $sort" ]
 221                                 );
 222                         } else {
 223                                 $res = $dbSecondary->select(
 224                                         [ 'user', 'actor' ],
 225                                         [ 'actor_id', 'user_id', 'user_name' ],
 226                                         array_merge( [ 'user_id' => $ids ], $from ? [ "user_id $from" ] : [] ),
 227                                         __METHOD__,
 228                                         [ 'ORDER BY' => "user_id $sort" ],
 229                                         [ 'actor' => [ 'LEFT JOIN', 'actor_user = user_id' ] ]
 230                                 );
 231                         }
 232                         $userIter = UserArray::newFromResult( $res );
 233                         $batchSize = count( $ids );
 234                 } else {
 235                         $names = [];
 236                         if ( !count( $this->params['user'] ) ) {
 237                                 $encParamName = $this->encodeParamName( 'user' );
 238                                 $this->dieWithError(
 239                                         [ 'apierror-paramempty', $encParamName ], "paramempty_$encParamName"
 240                                 );
 241                         }
 242                         foreach ( $this->params['user'] as $u ) {
 243                                 if ( $u === '' ) {
 244                                         $encParamName = $this->encodeParamName( 'user' );
 245                                         $this->dieWithError(
 246                                                 [ 'apierror-paramempty', $encParamName ], "paramempty_$encParamName"
 247                                         );
 248                                 }
 249
 250                                 if ( User::isIP( $u ) || ExternalUserNames::isExternal( $u ) ) {
 251                                         $names[$u] = null;
 252                                 } else {
 253                                         $name = User::getCanonicalName( $u, 'valid' );
 254                                         if ( $name === false ) {
 255                                                 $encParamName = $this->encodeParamName( 'user' );
 256                                                 $this->dieWithError(
 257                                                         [ 'apierror-baduser', $encParamName, wfEscapeWikiText( $u ) ], "baduser_$encParamName"
 258                                                 );
 259                                         }
 260                                         $names[$name] = null;
 261                                 }
 262                         }
 263
 264                         $this->orderBy = 'name';
 265                         $this->multiUserMode = count( $names ) > 1;
 266
 267                         $from = $fromName = false;
 268                         if ( $this->multiUserMode && !is_null( $this->params['continue'] ) ) {
 269                                 $continue = explode( '|', $this->params['continue'] );
 270                                 $this->dieContinueUsageIf( count( $continue ) != 4 );
 271                                 $this->dieContinueUsageIf( $continue[0] !== 'name' && $continue[0] !== 'actor' );
 272                                 $fromName = $continue[1];
 273                                 $from = "$op= " . $dbSecondary->addQuotes( $fromName );
 274                         }
 275
 276                         // For the new schema, just select from the actor table. For the
 277                         // old and transitional schemas, select from user and left join
 278                         // actor if it exists then merge in any unknown users (IPs and imports).
 279                         if ( $wgActorTableSchemaMigrationStage === MIGRATION_NEW ) {
 280                                 $res = $dbSecondary->select(
 281                                         'actor',
 282                                         [ 'actor_id', 'user_id' => 'actor_user', 'user_name' => 'actor_name' ],
 283                                         array_merge( [ 'actor_name' => array_keys( $names ) ], $from ? [ "actor_id $from" ] : [] ),
 284                                         __METHOD__,
 285                                         [ 'ORDER BY' => "actor_name $sort" ]
 286                                 );
 287                                 $userIter = UserArray::newFromResult( $res );
 288                         } else {
 289                                 if ( $wgActorTableSchemaMigrationStage === MIGRATION_OLD ) {
 290                                         $res = $dbSecondary->select(
 291                                                 'user',
 292                                                 [ 'actor_id' => 'NULL', 'user_id', 'user_name' ],
 293                                                 array_merge( [ 'user_name' => array_keys( $names ) ], $from ? [ "user_name $from" ] : [] ),
 294                                                 __METHOD__
 295                                         );
 296                                 } else {
 297                                         $res = $dbSecondary->select(
 298                                                 [ 'user', 'actor' ],
 299                                                 [ 'actor_id', 'user_id', 'user_name' ],
 300                                                 array_merge( [ 'user_name' => array_keys( $names ) ], $from ? [ "user_name $from" ] : [] ),
 301                                                 __METHOD__,
 302                                                 [],
 303                                                 [ 'actor' => [ 'LEFT JOIN', 'actor_user = user_id' ] ]
 304                                         );
 305                                 }
 306                                 foreach ( $res as $row ) {
 307                                         $names[$row->user_name] = $row;
 308                                 }
 309                                 call_user_func_array(
 310                                         $this->params['dir'] == 'newer' ? 'ksort' : 'krsort', [ &$names, SORT_STRING ]
 311                                 );
 312                                 $neg = $op === '>' ? -1 : 1;
 313                                 $userIter = call_user_func( function () use ( $names, $fromName, $neg ) {
 314                                         foreach ( $names as $name => $row ) {
 315                                                 if ( $fromName === false || $neg * strcmp( $name, $fromName ) <= 0 ) {
 316                                                         $user = $row ? User::newFromRow( $row ) : User::newFromName( $name, false );
 317                                                         yield $user;
 318                                                 }
 319                                         }
 320                                 } );
 321                         }
 322                         $batchSize = count( $names );
 323                 }
 324
 325                 // During migration, force ordering on the client side because we're
 326                 // having to combine multiple queries that would otherwise have
 327                 // different sort orders.
 328                 if ( $wgActorTableSchemaMigrationStage === MIGRATION_WRITE_BOTH ||
 329                         $wgActorTableSchemaMigrationStage === MIGRATION_WRITE_NEW
 330                 ) {
 331                         $batchSize = 1;
 332                 }
 333
 334                 // With the new schema, the DB query will order by actor so update $this->orderBy to match.
 335                 if ( $batchSize > 1 && $wgActorTableSchemaMigrationStage === MIGRATION_NEW ) {
 336                         $this->orderBy = 'actor';
 337                 }
 338
 339                 $count = 0;
 340                 $limit = $this->params['limit'];
 341                 $userIter->rewind();
 342                 while ( $userIter->valid() ) {
 343                         $users = [];
 344                         while ( count( $users ) < $batchSize && $userIter->valid() ) {
 345                                 $users[] = $userIter->current();
 346                                 $userIter->next();
 347                         }
 348
 349                         // Ugh. We have to run the query three times, once for each
 350                         // possible 'orcond' from ActorMigration, and then merge them all
 351                         // together in the proper order. And preserving the correct
 352                         // $hookData for each one.
 353                         // @todo When ActorMigration is removed, this can go back to a
 354                         //  single prepare and select.
 355                         $merged = [];
 356                         foreach ( [ 'actor', 'userid', 'username' ] as $which ) {
 357                                 if ( $this->prepareQuery( $users, $limit - $count, $which ) ) {
 358                                         $hookData = [];
 359                                         $res = $this->select( __METHOD__, [], $hookData );
 360                                         foreach ( $res as $row ) {
 361                                                 $merged[] = [ $row, &$hookData ];
 362                                         }
 363                                 }
 364                         }
 365                         $neg = $this->params['dir'] == 'newer' ? 1 : -1;
 366                         usort( $merged, function ( $a, $b ) use ( $neg, $batchSize ) {
 367                                 if ( $batchSize === 1 ) { // One user, can't be different
 368                                         $ret = 0;
 369                                 } elseif ( $this->orderBy === 'id' ) {
 370                                         $ret = $a[0]->rev_user - $b[0]->rev_user;
 371                                 } elseif ( $this->orderBy === 'name' ) {
 372                                         $ret = strcmp( $a[0]->rev_user_text, $b[0]->rev_user_text );
 373                                 } else {
 374                                         $ret = $a[0]->rev_actor - $b[0]->rev_actor;
 375                                 }
 376
 377                                 if ( !$ret ) {
 378                                         $ret = strcmp(
 379                                                 wfTimestamp( TS_MW, $a[0]->rev_timestamp ),
 380                                                 wfTimestamp( TS_MW, $b[0]->rev_timestamp )
 381                                         );
 382                                 }
 383
 384                                 if ( !$ret ) {
 385                                         $ret = $a[0]->rev_id - $b[0]->rev_id;
 386                                 }
 387
 388                                 return $neg * $ret;
 389                         } );
 390                         $merged = array_slice( $merged, 0, $limit - $count + 1 );
 391                         // (end "Ugh")
 392
 393                         if ( $this->fld_sizediff ) {
 394                                 $revIds = [];
 395                                 foreach ( $merged as $data ) {
 396                                         if ( $data[0]->rev_parent_id ) {
 397                                                 $revIds[] = $data[0]->rev_parent_id;
 398                                         }
 399                                 }
 400                                 $this->parentLens = Revision::getParentLengths( $dbSecondary, $revIds );
 401                         }
 402
 403                         foreach ( $merged as $data ) {
 404                                 $row = $data[0];
 405                                 $hookData = &$data[1];
 406                                 if ( ++$count > $limit ) {
 407                                         // We've reached the one extra which shows that there are
 408                                         // additional pages to be had. Stop here...
 409                                         $this->setContinueEnumParameter( 'continue', $this->continueStr( $row ) );
 410                                         break 2;
 411                                 }
 412
 413                                 $vals = $this->extractRowInfo( $row );
 414                                 $fit = $this->processRow( $row, $vals, $hookData ) &&
 415                                         $this->getResult()->addValue( [ 'query', $this->getModuleName() ], null, $vals );
 416                                 if ( !$fit ) {
 417                                         $this->setContinueEnumParameter( 'continue', $this->continueStr( $row ) );
 418                                         break 2;
 419                                 }
 420                         }
 421                 }
 422
 423                 $this->getResult()->addIndexedTagName( [ 'query', $this->getModuleName() ], 'item' );
 424         }
 425
 426         /**
 427          * Prepares the query and returns the limit of rows requested
 428          * @param User[] $users
 429          * @param int $limit
 430          * @param string $which 'actor', 'userid', or 'username'
 431          * @return bool
 432          */
 433         private function prepareQuery( array $users, $limit, $which ) {
 434                 global $wgActorTableSchemaMigrationStage;
 435
 436                 $this->resetQueryParams();
 437                 $db = $this->getDB();
 438
 439                 $revQuery = Revision::getQueryInfo( [ 'page' ] );
 440                 $this->addTables( $revQuery['tables'] );
 441                 $this->addJoinConds( $revQuery['joins'] );
 442                 $this->addFields( $revQuery['fields'] );
 443
 444                 $revWhere = ActorMigration::newMigration()->getWhere( $db, 'rev_user', $users );
 445                 if ( !isset( $revWhere['orconds'][$which] ) ) {
 446                         return false;
 447                 }
 448                 $this->addWhere( $revWhere['orconds'][$which] );
 449
 450                 if ( $wgActorTableSchemaMigrationStage === MIGRATION_NEW ) {
 451                         $orderUserField = 'rev_actor';
 452                         $userField = $this->orderBy === 'actor' ? 'revactor_actor' : 'actor_name';
 453                 } else {
 454                         $orderUserField = $this->orderBy === 'id' ? 'rev_user' : 'rev_user_text';
 455                         $userField = $revQuery['fields'][$orderUserField];
 456                 }
 457                 if ( $which === 'actor' ) {
 458                         $tsField = 'revactor_timestamp';
 459                         $idField = 'revactor_rev';
 460                 } else {
 461                         $tsField = 'rev_timestamp';
 462                         $idField = 'rev_id';
 463                 }
 464
 465                 // Handle continue parameter
 466                 if ( !is_null( $this->params['continue'] ) ) {
 467                         $continue = explode( '|', $this->params['continue'] );
 468                         if ( $this->multiUserMode ) {
 469                                 $this->dieContinueUsageIf( count( $continue ) != 4 );
 470                                 $modeFlag = array_shift( $continue );
 471                                 $this->dieContinueUsageIf( $modeFlag !== $this->orderBy );
 472                                 $encUser = $db->addQuotes( array_shift( $continue ) );
 473                         } else {
 474                                 $this->dieContinueUsageIf( count( $continue ) != 2 );
 475                         }
 476                         $encTS = $db->addQuotes( $db->timestamp( $continue[0] ) );
 477                         $encId = (int)$continue[1];
 478                         $this->dieContinueUsageIf( $encId != $continue[1] );
 479                         $op = ( $this->params['dir'] == 'older' ? '<' : '>' );
 480                         if ( $this->multiUserMode ) {
 481                                 $this->addWhere(
 482                                         "$userField $op $encUser OR " .
 483                                         "($userField = $encUser AND " .
 484                                         "($tsField $op $encTS OR " .
 485                                         "($tsField = $encTS AND " .
 486                                         "$idField $op= $encId)))"
 487                                 );
 488                         } else {
 489                                 $this->addWhere(
 490                                         "$tsField $op $encTS OR " .
 491                                         "($tsField = $encTS AND " .
 492                                         "$idField $op= $encId)"
 493                                 );
 494                         }
 495                 }
 496
 497                 // Don't include any revisions where we're not supposed to be able to
 498                 // see the username.
 499                 $user = $this->getUser();
 500                 if ( !$user->isAllowed( 'deletedhistory' ) ) {
 501                         $bitmask = Revision::DELETED_USER;
 502                 } elseif ( !$user->isAllowedAny( 'suppressrevision', 'viewsuppressed' ) ) {
 503                         $bitmask = Revision::DELETED_USER | Revision::DELETED_RESTRICTED;
 504                 } else {
 505                         $bitmask = 0;
 506                 }
 507                 if ( $bitmask ) {
 508                         $this->addWhere( $db->bitAnd( 'rev_deleted', $bitmask ) . " != $bitmask" );
 509                 }
 510
 511                 // Add the user field to ORDER BY if there are multiple users
 512                 if ( count( $users ) > 1 ) {
 513                         $this->addWhereRange( $orderUserField, $this->params['dir'], null, null );
 514                 }
 515
 516                 // Then timestamp
 517                 $this->addTimestampWhereRange( $tsField,
 518                         $this->params['dir'], $this->params['start'], $this->params['end'] );
 519
 520                 // Then rev_id for a total ordering
 521                 $this->addWhereRange( $idField, $this->params['dir'], null, null );
 522
 523                 $this->addWhereFld( 'page_namespace', $this->params['namespace'] );
 524
 525                 $show = $this->params['show'];
 526                 if ( $this->params['toponly'] ) { // deprecated/old param
 527                         $show[] = 'top';
 528                 }
 529                 if ( !is_null( $show ) ) {
 530                         $show = array_flip( $show );
 531
 532                         if ( ( isset( $show['minor'] ) && isset( $show['!minor'] ) )
 533                                 || ( isset( $show['patrolled'] ) && isset( $show['!patrolled'] ) )
 534                                 || ( isset( $show['autopatrolled'] ) && isset( $show['!autopatrolled'] ) )
 535                                 || ( isset( $show['autopatrolled'] ) && isset( $show['!patrolled'] ) )
 536                                 || ( isset( $show['top'] ) && isset( $show['!top'] ) )
 537                                 || ( isset( $show['new'] ) && isset( $show['!new'] ) )
 538                         ) {
 539                                 $this->dieWithError( 'apierror-show' );
 540                         }
 541
 542                         $this->addWhereIf( 'rev_minor_edit = 0', isset( $show['!minor'] ) );
 543                         $this->addWhereIf( 'rev_minor_edit != 0', isset( $show['minor'] ) );
 544                         $this->addWhereIf(
 545                                 'rc_patrolled = ' . RecentChange::PRC_UNPATROLLED,
 546                                 isset( $show['!patrolled'] )
 547                         );
 548                         $this->addWhereIf(
 549                                 'rc_patrolled != ' . RecentChange::PRC_UNPATROLLED,
 550                                 isset( $show['patrolled'] )
 551                         );
 552                         $this->addWhereIf(
 553                                 'rc_patrolled != ' . RecentChange::PRC_AUTOPATROLLED,
 554                                 isset( $show['!autopatrolled'] )
 555                         );
 556                         $this->addWhereIf(
 557                                 'rc_patrolled = ' . RecentChange::PRC_AUTOPATROLLED,
 558                                 isset( $show['autopatrolled'] )
 559                         );
 560                         $this->addWhereIf( $idField . ' != page_latest', isset( $show['!top'] ) );
 561                         $this->addWhereIf( $idField . ' = page_latest', isset( $show['top'] ) );
 562                         $this->addWhereIf( 'rev_parent_id != 0', isset( $show['!new'] ) );
 563                         $this->addWhereIf( 'rev_parent_id = 0', isset( $show['new'] ) );
 564                 }
 565                 $this->addOption( 'LIMIT', $limit + 1 );
 566
 567                 if ( isset( $show['patrolled'] ) || isset( $show['!patrolled'] ) ||
 568                         isset( $show['autopatrolled'] ) || isset( $show['!autopatrolled'] ) || $this->fld_patrolled
 569                 ) {
 570                         if ( !$user->useRCPatrol() && !$user->useNPPatrol() ) {
 571                                 $this->dieWithError( 'apierror-permissiondenied-patrolflag', 'permissiondenied' );
 572                         }
 573
 574                         $isFilterset = isset( $show['patrolled'] ) || isset( $show['!patrolled'] ) ||
 575                                 isset( $show['autopatrolled'] ) || isset( $show['!autopatrolled'] );
 576                         $this->addTables( 'recentchanges' );
 577                         $this->addJoinConds( [ 'recentchanges' => [
 578                                 $isFilterset ? 'JOIN' : 'LEFT JOIN',
 579                                 [
 580                                         // This is a crazy hack. recentchanges has no index on rc_this_oldid, so instead of adding
 581                                         // one T19237 did a join using rc_user_text and rc_timestamp instead. Now rc_user_text is
 582                                         // probably unavailable, so just do rc_timestamp.
 583                                         'rc_timestamp = ' . $tsField,
 584                                         'rc_this_oldid = ' . $idField,
 585                                 ]
 586                         ] ] );
 587                 }
 588
 589                 $this->addFieldsIf( 'rc_patrolled', $this->fld_patrolled );
 590
 591                 if ( $this->fld_tags ) {
 592                         $this->addTables( 'tag_summary' );
 593                         $this->addJoinConds(
 594                                 [ 'tag_summary' => [ 'LEFT JOIN', [ $idField . ' = ts_rev_id' ] ] ]
 595                         );
 596                         $this->addFields( 'ts_tags' );
 597                 }
 598
 599                 if ( isset( $this->params['tag'] ) ) {
 600                         $this->addTables( 'change_tag' );
 601                         $this->addJoinConds(
 602                                 [ 'change_tag' => [ 'INNER JOIN', [ $idField . ' = ct_rev_id' ] ] ]
 603                         );
 604                         $this->addWhereFld( 'ct_tag', $this->params['tag'] );
 605                 }
 606
 607                 return true;
 608         }
 609
 610         /**
 611          * Extract fields from the database row and append them to a result array
 612          *
 613          * @param stdClass $row
 614          * @return array
 615          */
 616         private function extractRowInfo( $row ) {
 617                 $vals = [];
 618                 $anyHidden = false;
 619
 620                 if ( $row->rev_deleted & Revision::DELETED_TEXT ) {
 621                         $vals['texthidden'] = true;
 622                         $anyHidden = true;
 623                 }
 624
 625                 // Any rows where we can't view the user were filtered out in the query.
 626                 $vals['userid'] = (int)$row->rev_user;
 627                 $vals['user'] = $row->rev_user_text;
 628                 if ( $row->rev_deleted & Revision::DELETED_USER ) {
 629                         $vals['userhidden'] = true;
 630                         $anyHidden = true;
 631                 }
 632                 if ( $this->fld_ids ) {
 633                         $vals['pageid'] = intval( $row->rev_page );
 634                         $vals['revid'] = intval( $row->rev_id );
 635                         // $vals['textid'] = intval( $row->rev_text_id ); // todo: Should this field be exposed?
 636
 637                         if ( !is_null( $row->rev_parent_id ) ) {
 638                                 $vals['parentid'] = intval( $row->rev_parent_id );
 639                         }
 640                 }
 641
 642                 $title = Title::makeTitle( $row->page_namespace, $row->page_title );
 643
 644                 if ( $this->fld_title ) {
 645                         ApiQueryBase::addTitleInfo( $vals, $title );
 646                 }
 647
 648                 if ( $this->fld_timestamp ) {
 649                         $vals['timestamp'] = wfTimestamp( TS_ISO_8601, $row->rev_timestamp );
 650                 }
 651
 652                 if ( $this->fld_flags ) {
 653                         $vals['new'] = $row->rev_parent_id == 0 && !is_null( $row->rev_parent_id );
 654                         $vals['minor'] = (bool)$row->rev_minor_edit;
 655                         $vals['top'] = $row->page_latest == $row->rev_id;
 656                 }
 657
 658                 if ( $this->fld_comment || $this->fld_parsedcomment ) {
 659                         if ( $row->rev_deleted & Revision::DELETED_COMMENT ) {
 660                                 $vals['commenthidden'] = true;
 661                                 $anyHidden = true;
 662                         }
 663
 664                         $userCanView = Revision::userCanBitfield(
 665                                 $row->rev_deleted,
 666                                 Revision::DELETED_COMMENT, $this->getUser()
 667                         );
 668
 669                         if ( $userCanView ) {
 670                                 $comment = $this->commentStore->getComment( 'rev_comment', $row )->text;
 671                                 if ( $this->fld_comment ) {
 672                                         $vals['comment'] = $comment;
 673                                 }
 674
 675                                 if ( $this->fld_parsedcomment ) {
 676                                         $vals['parsedcomment'] = Linker::formatComment( $comment, $title );
 677                                 }
 678                         }
 679                 }
 680
 681                 if ( $this->fld_patrolled ) {
 682                         $vals['patrolled'] = $row->rc_patrolled != RecentChange::PRC_UNPATROLLED;
 683                         $vals['autopatrolled'] = $row->rc_patrolled == RecentChange::PRC_AUTOPATROLLED;
 684                 }
 685
 686                 if ( $this->fld_size && !is_null( $row->rev_len ) ) {
 687                         $vals['size'] = intval( $row->rev_len );
 688                 }
 689
 690                 if ( $this->fld_sizediff
 691                         && !is_null( $row->rev_len )
 692                         && !is_null( $row->rev_parent_id )
 693                 ) {
 694                         $parentLen = isset( $this->parentLens[$row->rev_parent_id] )
 695                                 ? $this->parentLens[$row->rev_parent_id]
 696                                 : 0;
 697                         $vals['sizediff'] = intval( $row->rev_len - $parentLen );
 698                 }
 699
 700                 if ( $this->fld_tags ) {
 701                         if ( $row->ts_tags ) {
 702                                 $tags = explode( ',', $row->ts_tags );
 703                                 ApiResult::setIndexedTagName( $tags, 'tag' );
 704                                 $vals['tags'] = $tags;
 705                         } else {
 706                                 $vals['tags'] = [];
 707                         }
 708                 }
 709
 710                 if ( $anyHidden && $row->rev_deleted & Revision::DELETED_RESTRICTED ) {
 711                         $vals['suppressed'] = true;
 712                 }
 713
 714                 return $vals;
 715         }
 716
 717         private function continueStr( $row ) {
 718                 if ( $this->multiUserMode ) {
 719                         switch ( $this->orderBy ) {
 720                                 case 'id':
 721                                         return "id|$row->rev_user|$row->rev_timestamp|$row->rev_id";
 722                                 case 'name':
 723                                         return "name|$row->rev_user_text|$row->rev_timestamp|$row->rev_id";
 724                                 case 'actor':
 725                                         return "actor|$row->rev_actor|$row->rev_timestamp|$row->rev_id";
 726                         }
 727                 } else {
 728                         return "$row->rev_timestamp|$row->rev_id";
 729                 }
 730         }
 731
 732         public function getCacheMode( $params ) {
 733                 // This module provides access to deleted revisions and patrol flags if
 734                 // the requester is logged in
 735                 return 'anon-public-user-private';
 736         }
 737
 738         public function getAllowedParams() {
 739                 return [
 740                         'limit' => [
 741                                 ApiBase::PARAM_DFLT => 10,
 742                                 ApiBase::PARAM_TYPE => 'limit',
 743                                 ApiBase::PARAM_MIN => 1,
 744                                 ApiBase::PARAM_MAX => ApiBase::LIMIT_BIG1,
 745                                 ApiBase::PARAM_MAX2 => ApiBase::LIMIT_BIG2
 746                         ],
 747                         'start' => [
 748                                 ApiBase::PARAM_TYPE => 'timestamp'
 749                         ],
 750                         'end' => [
 751                                 ApiBase::PARAM_TYPE => 'timestamp'
 752                         ],
 753                         'continue' => [
 754                                 ApiBase::PARAM_HELP_MSG => 'api-help-param-continue',
 755                         ],
 756                         'user' => [
 757                                 ApiBase::PARAM_TYPE => 'user',
 758                                 ApiBase::PARAM_ISMULTI => true
 759                         ],
 760                         'userids' => [
 761                                 ApiBase::PARAM_TYPE => 'integer',
 762                                 ApiBase::PARAM_ISMULTI => true
 763                         ],
 764                         'userprefix' => null,
 765                         'dir' => [
 766                                 ApiBase::PARAM_DFLT => 'older',
 767                                 ApiBase::PARAM_TYPE => [
 768                                         'newer',
 769                                         'older'
 770                                 ],
 771                                 ApiBase::PARAM_HELP_MSG => 'api-help-param-direction',
 772                         ],
 773                         'namespace' => [
 774                                 ApiBase::PARAM_ISMULTI => true,
 775                                 ApiBase::PARAM_TYPE => 'namespace'
 776                         ],
 777                         'prop' => [
 778                                 ApiBase::PARAM_ISMULTI => true,
 779                                 ApiBase::PARAM_DFLT => 'ids|title|timestamp|comment|size|flags',
 780                                 ApiBase::PARAM_TYPE => [
 781                                         'ids',
 782                                         'title',
 783                                         'timestamp',
 784                                         'comment',
 785                                         'parsedcomment',
 786                                         'size',
 787                                         'sizediff',
 788                                         'flags',
 789                                         'patrolled',
 790                                         'tags'
 791                                 ],
 792                                 ApiBase::PARAM_HELP_MSG_PER_VALUE => [],
 793                         ],
 794                         'show' => [
 795                                 ApiBase::PARAM_ISMULTI => true,
 796                                 ApiBase::PARAM_TYPE => [
 797                                         'minor',
 798                                         '!minor',
 799                                         'patrolled',
 800                                         '!patrolled',
 801                                         'autopatrolled',
 802                                         '!autopatrolled',
 803                                         'top',
 804                                         '!top',
 805                                         'new',
 806                                         '!new',
 807                                 ],
 808                                 ApiBase::PARAM_HELP_MSG => [
 809                                         'apihelp-query+usercontribs-param-show',
 810                                         $this->getConfig()->get( 'RCMaxAge' )
 811                                 ],
 812                         ],
 813                         'tag' => null,
 814                         'toponly' => [
 815                                 ApiBase::PARAM_DFLT => false,
 816                                 ApiBase::PARAM_DEPRECATED => true,
 817                         ],
 818                 ];
 819         }
 820
 821         protected function getExamplesMessages() {
 822                 return [
 823                         'action=query&list=usercontribs&ucuser=Example'
 824                                 => 'apihelp-query+usercontribs-example-user',
 825                         'action=query&list=usercontribs&ucuserprefix=192.0.2.'
 826                                 => 'apihelp-query+usercontribs-example-ipprefix',
 827                 ];
 828         }
 829
 830         public function getHelpUrls() {
 831                 return 'https://www.mediawiki.org/wiki/Special:MyLanguage/API:Usercontribs';
 832         }
 833 }
 834
 835 class_alias( ApiQueryUserContribs::class, 'ApiQueryContributions' );