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