includes/api/ApiQueryLogEvents.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 use MediaWiki\MediaWikiServices;
  24 use MediaWiki\Storage\NameTableAccessException;
  25
  26 /**
  27  * Query action to List the log events, with optional filtering by various parameters.
  28  *
  29  * @ingroup API
  30  */
  31 class ApiQueryLogEvents extends ApiQueryBase {
  32
  33         private $commentStore;
  34
  35         public function __construct( ApiQuery $query, $moduleName ) {
  36                 parent::__construct( $query, $moduleName, 'le' );
  37         }
  38
  39         private $fld_ids = false, $fld_title = false, $fld_type = false,
  40                 $fld_user = false, $fld_userid = false,
  41                 $fld_timestamp = false, $fld_comment = false, $fld_parsedcomment = false,
  42                 $fld_details = false, $fld_tags = false;
  43
  44         public function execute() {
  45                 $params = $this->extractRequestParams();
  46                 $db = $this->getDB();
  47                 $this->commentStore = CommentStore::getStore();
  48                 $this->requireMaxOneParameter( $params, 'title', 'prefix', 'namespace' );
  49
  50                 $prop = array_flip( $params['prop'] );
  51
  52                 $this->fld_ids = isset( $prop['ids'] );
  53                 $this->fld_title = isset( $prop['title'] );
  54                 $this->fld_type = isset( $prop['type'] );
  55                 $this->fld_user = isset( $prop['user'] );
  56                 $this->fld_userid = isset( $prop['userid'] );
  57                 $this->fld_timestamp = isset( $prop['timestamp'] );
  58                 $this->fld_comment = isset( $prop['comment'] );
  59                 $this->fld_parsedcomment = isset( $prop['parsedcomment'] );
  60                 $this->fld_details = isset( $prop['details'] );
  61                 $this->fld_tags = isset( $prop['tags'] );
  62
  63                 $hideLogs = LogEventsList::getExcludeClause( $db, 'user', $this->getUser() );
  64                 if ( $hideLogs !== false ) {
  65                         $this->addWhere( $hideLogs );
  66                 }
  67
  68                 $actorMigration = ActorMigration::newMigration();
  69                 $actorQuery = $actorMigration->getJoin( 'log_user' );
  70                 $this->addTables( 'logging' );
  71                 $this->addTables( $actorQuery['tables'] );
  72                 $this->addTables( [ 'user', 'page' ] );
  73                 $this->addJoinConds( $actorQuery['joins'] );
  74                 $this->addJoinConds( [
  75                         'user' => [ 'LEFT JOIN',
  76                                 'user_id=' . $actorQuery['fields']['log_user'] ],
  77                         'page' => [ 'LEFT JOIN',
  78                                 [ 'log_namespace=page_namespace',
  79                                         'log_title=page_title' ] ] ] );
  80
  81                 $this->addFields( [
  82                         'log_id',
  83                         'log_type',
  84                         'log_action',
  85                         'log_timestamp',
  86                         'log_deleted',
  87                 ] );
  88
  89                 $this->addFieldsIf( 'page_id', $this->fld_ids );
  90                 // log_page is the page_id saved at log time, whereas page_id is from a
  91                 // join at query time.  This leads to different results in various
  92                 // scenarios, e.g. deletion, recreation.
  93                 $this->addFieldsIf( 'log_page', $this->fld_ids );
  94                 $this->addFieldsIf( $actorQuery['fields'] + [ 'user_name' ], $this->fld_user );
  95                 $this->addFieldsIf( $actorQuery['fields'], $this->fld_userid );
  96                 $this->addFieldsIf(
  97                         [ 'log_namespace', 'log_title' ],
  98                         $this->fld_title || $this->fld_parsedcomment
  99                 );
 100                 $this->addFieldsIf( 'log_params', $this->fld_details );
 101
 102                 if ( $this->fld_comment || $this->fld_parsedcomment ) {
 103                         $commentQuery = $this->commentStore->getJoin( 'log_comment' );
 104                         $this->addTables( $commentQuery['tables'] );
 105                         $this->addFields( $commentQuery['fields'] );
 106                         $this->addJoinConds( $commentQuery['joins'] );
 107                 }
 108
 109                 if ( $this->fld_tags ) {
 110                         $this->addFields( [ 'ts_tags' => ChangeTags::makeTagSummarySubquery( 'logging' ) ] );
 111                 }
 112
 113                 if ( !is_null( $params['tag'] ) ) {
 114                         $this->addTables( 'change_tag' );
 115                         $this->addJoinConds( [ 'change_tag' => [ 'INNER JOIN',
 116                                 [ 'log_id=ct_log_id' ] ] ] );
 117                         $changeTagDefStore = MediaWikiServices::getInstance()->getChangeTagDefStore();
 118                         try {
 119                                 $this->addWhereFld( 'ct_tag_id', $changeTagDefStore->getId( $params['tag'] ) );
 120                         } catch ( NameTableAccessException $exception ) {
 121                                 // Return nothing.
 122                                 $this->addWhere( '1=0' );
 123                         }
 124                 }
 125
 126                 if ( !is_null( $params['action'] ) ) {
 127                         // Do validation of action param, list of allowed actions can contains wildcards
 128                         // Allow the param, when the actions is in the list or a wildcard version is listed.
 129                         $logAction = $params['action'];
 130                         if ( strpos( $logAction, '/' ) === false ) {
 131                                 // all items in the list have a slash
 132                                 $valid = false;
 133                         } else {
 134                                 $logActions = array_flip( $this->getAllowedLogActions() );
 135                                 list( $type, $action ) = explode( '/', $logAction, 2 );
 136                                 $valid = isset( $logActions[$logAction] ) || isset( $logActions[$type . '/*'] );
 137                         }
 138
 139                         if ( !$valid ) {
 140                                 $encParamName = $this->encodeParamName( 'action' );
 141                                 $this->dieWithError(
 142                                         [ 'apierror-unrecognizedvalue', $encParamName, wfEscapeWikiText( $logAction ) ],
 143                                         "unknown_$encParamName"
 144                                 );
 145                         }
 146
 147                         $this->addWhereFld( 'log_type', $type );
 148                         $this->addWhereFld( 'log_action', $action );
 149                 } elseif ( !is_null( $params['type'] ) ) {
 150                         $this->addWhereFld( 'log_type', $params['type'] );
 151                 }
 152
 153                 $this->addTimestampWhereRange(
 154                         'log_timestamp',
 155                         $params['dir'],
 156                         $params['start'],
 157                         $params['end']
 158                 );
 159                 // Include in ORDER BY for uniqueness
 160                 $this->addWhereRange( 'log_id', $params['dir'], null, null );
 161
 162                 if ( !is_null( $params['continue'] ) ) {
 163                         $cont = explode( '|', $params['continue'] );
 164                         $this->dieContinueUsageIf( count( $cont ) != 2 );
 165                         $op = ( $params['dir'] === 'newer' ? '>' : '<' );
 166                         $continueTimestamp = $db->addQuotes( $db->timestamp( $cont[0] ) );
 167                         $continueId = (int)$cont[1];
 168                         $this->dieContinueUsageIf( $continueId != $cont[1] );
 169                         $this->addWhere( "log_timestamp $op $continueTimestamp OR " .
 170                                 "(log_timestamp = $continueTimestamp AND " .
 171                                 "log_id $op= $continueId)"
 172                         );
 173                 }
 174
 175                 $limit = $params['limit'];
 176                 $this->addOption( 'LIMIT', $limit + 1 );
 177
 178                 $user = $params['user'];
 179                 if ( !is_null( $user ) ) {
 180                         // Note the joins in $q are the same as those from ->getJoin() above
 181                         // so we only need to add 'conds' here.
 182                         $q = $actorMigration->getWhere(
 183                                 $db, 'log_user', User::newFromName( $params['user'], false )
 184                         );
 185                         $this->addWhere( $q['conds'] );
 186                 }
 187
 188                 $title = $params['title'];
 189                 if ( !is_null( $title ) ) {
 190                         $titleObj = Title::newFromText( $title );
 191                         if ( is_null( $titleObj ) ) {
 192                                 $this->dieWithError( [ 'apierror-invalidtitle', wfEscapeWikiText( $title ) ] );
 193                         }
 194                         $this->addWhereFld( 'log_namespace', $titleObj->getNamespace() );
 195                         $this->addWhereFld( 'log_title', $titleObj->getDBkey() );
 196                 }
 197
 198                 if ( $params['namespace'] !== null ) {
 199                         $this->addWhereFld( 'log_namespace', $params['namespace'] );
 200                 }
 201
 202                 $prefix = $params['prefix'];
 203
 204                 if ( !is_null( $prefix ) ) {
 205                         if ( $this->getConfig()->get( 'MiserMode' ) ) {
 206                                 $this->dieWithError( 'apierror-prefixsearchdisabled' );
 207                         }
 208
 209                         $title = Title::newFromText( $prefix );
 210                         if ( is_null( $title ) ) {
 211                                 $this->dieWithError( [ 'apierror-invalidtitle', wfEscapeWikiText( $prefix ) ] );
 212                         }
 213                         $this->addWhereFld( 'log_namespace', $title->getNamespace() );
 214                         $this->addWhere( 'log_title ' . $db->buildLike( $title->getDBkey(), $db->anyString() ) );
 215                 }
 216
 217                 // Paranoia: avoid brute force searches (T19342)
 218                 if ( $params['namespace'] !== null || !is_null( $title ) || !is_null( $user ) ) {
 219                         if ( !$this->getUser()->isAllowed( 'deletedhistory' ) ) {
 220                                 $titleBits = LogPage::DELETED_ACTION;
 221                                 $userBits = LogPage::DELETED_USER;
 222                         } elseif ( !$this->getUser()->isAllowedAny( 'suppressrevision', 'viewsuppressed' ) ) {
 223                                 $titleBits = LogPage::DELETED_ACTION | LogPage::DELETED_RESTRICTED;
 224                                 $userBits = LogPage::DELETED_USER | LogPage::DELETED_RESTRICTED;
 225                         } else {
 226                                 $titleBits = 0;
 227                                 $userBits = 0;
 228                         }
 229                         if ( ( $params['namespace'] !== null || !is_null( $title ) ) && $titleBits ) {
 230                                 $this->addWhere( $db->bitAnd( 'log_deleted', $titleBits ) . " != $titleBits" );
 231                         }
 232                         if ( !is_null( $user ) && $userBits ) {
 233                                 $this->addWhere( $db->bitAnd( 'log_deleted', $userBits ) . " != $userBits" );
 234                         }
 235                 }
 236
 237                 $count = 0;
 238                 $res = $this->select( __METHOD__ );
 239                 $result = $this->getResult();
 240                 foreach ( $res as $row ) {
 241                         if ( ++$count > $limit ) {
 242                                 // We've reached the one extra which shows that there are
 243                                 // additional pages to be had. Stop here...
 244                                 $this->setContinueEnumParameter( 'continue', "$row->log_timestamp|$row->log_id" );
 245                                 break;
 246                         }
 247
 248                         $vals = $this->extractRowInfo( $row );
 249                         $fit = $result->addValue( [ 'query', $this->getModuleName() ], null, $vals );
 250                         if ( !$fit ) {
 251                                 $this->setContinueEnumParameter( 'continue', "$row->log_timestamp|$row->log_id" );
 252                                 break;
 253                         }
 254                 }
 255                 $result->addIndexedTagName( [ 'query', $this->getModuleName() ], 'item' );
 256         }
 257
 258         private function extractRowInfo( $row ) {
 259                 $logEntry = DatabaseLogEntry::newFromRow( $row );
 260                 $vals = [
 261                         ApiResult::META_TYPE => 'assoc',
 262                 ];
 263                 $anyHidden = false;
 264                 $user = $this->getUser();
 265
 266                 if ( $this->fld_ids ) {
 267                         $vals['logid'] = intval( $row->log_id );
 268                 }
 269
 270                 if ( $this->fld_title || $this->fld_parsedcomment ) {
 271                         $title = Title::makeTitle( $row->log_namespace, $row->log_title );
 272                 }
 273
 274                 if ( $this->fld_title || $this->fld_ids || $this->fld_details && $row->log_params !== '' ) {
 275                         if ( LogEventsList::isDeleted( $row, LogPage::DELETED_ACTION ) ) {
 276                                 $vals['actionhidden'] = true;
 277                                 $anyHidden = true;
 278                         }
 279                         if ( LogEventsList::userCan( $row, LogPage::DELETED_ACTION, $user ) ) {
 280                                 if ( $this->fld_title ) {
 281                                         ApiQueryBase::addTitleInfo( $vals, $title );
 282                                 }
 283                                 if ( $this->fld_ids ) {
 284                                         $vals['pageid'] = intval( $row->page_id );
 285                                         $vals['logpage'] = intval( $row->log_page );
 286                                 }
 287                                 if ( $this->fld_details ) {
 288                                         $vals['params'] = LogFormatter::newFromEntry( $logEntry )->formatParametersForApi();
 289                                 }
 290                         }
 291                 }
 292
 293                 if ( $this->fld_type ) {
 294                         $vals['type'] = $row->log_type;
 295                         $vals['action'] = $row->log_action;
 296                 }
 297
 298                 if ( $this->fld_user || $this->fld_userid ) {
 299                         if ( LogEventsList::isDeleted( $row, LogPage::DELETED_USER ) ) {
 300                                 $vals['userhidden'] = true;
 301                                 $anyHidden = true;
 302                         }
 303                         if ( LogEventsList::userCan( $row, LogPage::DELETED_USER, $user ) ) {
 304                                 if ( $this->fld_user ) {
 305                                         $vals['user'] = $row->user_name ?? $row->log_user_text;
 306                                 }
 307                                 if ( $this->fld_userid ) {
 308                                         $vals['userid'] = intval( $row->log_user );
 309                                 }
 310
 311                                 if ( !$row->log_user ) {
 312                                         $vals['anon'] = true;
 313                                 }
 314                         }
 315                 }
 316                 if ( $this->fld_timestamp ) {
 317                         $vals['timestamp'] = wfTimestamp( TS_ISO_8601, $row->log_timestamp );
 318                 }
 319
 320                 if ( $this->fld_comment || $this->fld_parsedcomment ) {
 321                         if ( LogEventsList::isDeleted( $row, LogPage::DELETED_COMMENT ) ) {
 322                                 $vals['commenthidden'] = true;
 323                                 $anyHidden = true;
 324                         }
 325                         if ( LogEventsList::userCan( $row, LogPage::DELETED_COMMENT, $user ) ) {
 326                                 $comment = $this->commentStore->getComment( 'log_comment', $row )->text;
 327                                 if ( $this->fld_comment ) {
 328                                         $vals['comment'] = $comment;
 329                                 }
 330
 331                                 if ( $this->fld_parsedcomment ) {
 332                                         $vals['parsedcomment'] = Linker::formatComment( $comment, $title );
 333                                 }
 334                         }
 335                 }
 336
 337                 if ( $this->fld_tags ) {
 338                         if ( $row->ts_tags ) {
 339                                 $tags = explode( ',', $row->ts_tags );
 340                                 ApiResult::setIndexedTagName( $tags, 'tag' );
 341                                 $vals['tags'] = $tags;
 342                         } else {
 343                                 $vals['tags'] = [];
 344                         }
 345                 }
 346
 347                 if ( $anyHidden && LogEventsList::isDeleted( $row, LogPage::DELETED_RESTRICTED ) ) {
 348                         $vals['suppressed'] = true;
 349                 }
 350
 351                 return $vals;
 352         }
 353
 354         /**
 355          * @return array
 356          */
 357         private function getAllowedLogActions() {
 358                 $config = $this->getConfig();
 359                 return array_keys( array_merge(
 360                         $config->get( 'LogActions' ),
 361                         $config->get( 'LogActionsHandlers' )
 362                 ) );
 363         }
 364
 365         public function getCacheMode( $params ) {
 366                 if ( $this->userCanSeeRevDel() ) {
 367                         return 'private';
 368                 }
 369                 if ( !is_null( $params['prop'] ) && in_array( 'parsedcomment', $params['prop'] ) ) {
 370                         // formatComment() calls wfMessage() among other things
 371                         return 'anon-public-user-private';
 372                 } elseif ( LogEventsList::getExcludeClause( $this->getDB(), 'user', $this->getUser() )
 373                         === LogEventsList::getExcludeClause( $this->getDB(), 'public' )
 374                 ) { // Output can only contain public data.
 375                         return 'public';
 376                 } else {
 377                         return 'anon-public-user-private';
 378                 }
 379         }
 380
 381         public function getAllowedParams( $flags = 0 ) {
 382                 $config = $this->getConfig();
 383                 if ( $flags & ApiBase::GET_VALUES_FOR_HELP ) {
 384                         $logActions = $this->getAllowedLogActions();
 385                         sort( $logActions );
 386                 } else {
 387                         $logActions = null;
 388                 }
 389                 $ret = [
 390                         'prop' => [
 391                                 ApiBase::PARAM_ISMULTI => true,
 392                                 ApiBase::PARAM_DFLT => 'ids|title|type|user|timestamp|comment|details',
 393                                 ApiBase::PARAM_TYPE => [
 394                                         'ids',
 395                                         'title',
 396                                         'type',
 397                                         'user',
 398                                         'userid',
 399                                         'timestamp',
 400                                         'comment',
 401                                         'parsedcomment',
 402                                         'details',
 403                                         'tags'
 404                                 ],
 405                                 ApiBase::PARAM_HELP_MSG_PER_VALUE => [],
 406                         ],
 407                         'type' => [
 408                                 ApiBase::PARAM_TYPE => LogPage::validTypes(),
 409                         ],
 410                         'action' => [
 411                                 // validation on request is done in execute()
 412                                 ApiBase::PARAM_TYPE => $logActions
 413                         ],
 414                         'start' => [
 415                                 ApiBase::PARAM_TYPE => 'timestamp'
 416                         ],
 417                         'end' => [
 418                                 ApiBase::PARAM_TYPE => 'timestamp'
 419                         ],
 420                         'dir' => [
 421                                 ApiBase::PARAM_DFLT => 'older',
 422                                 ApiBase::PARAM_TYPE => [
 423                                         'newer',
 424                                         'older'
 425                                 ],
 426                                 ApiBase::PARAM_HELP_MSG => 'api-help-param-direction',
 427                         ],
 428                         'user' => [
 429                                 ApiBase::PARAM_TYPE => 'user',
 430                         ],
 431                         'title' => null,
 432                         'namespace' => [
 433                                 ApiBase::PARAM_TYPE => 'namespace',
 434                                 ApiBase::PARAM_EXTRA_NAMESPACES => [ NS_MEDIA, NS_SPECIAL ],
 435                         ],
 436                         'prefix' => [],
 437                         'tag' => null,
 438                         'limit' => [
 439                                 ApiBase::PARAM_DFLT => 10,
 440                                 ApiBase::PARAM_TYPE => 'limit',
 441                                 ApiBase::PARAM_MIN => 1,
 442                                 ApiBase::PARAM_MAX => ApiBase::LIMIT_BIG1,
 443                                 ApiBase::PARAM_MAX2 => ApiBase::LIMIT_BIG2
 444                         ],
 445                         'continue' => [
 446                                 ApiBase::PARAM_HELP_MSG => 'api-help-param-continue',
 447                         ],
 448                 ];
 449
 450                 if ( $config->get( 'MiserMode' ) ) {
 451                         $ret['prefix'][ApiBase::PARAM_HELP_MSG] = 'api-help-param-disabled-in-miser-mode';
 452                 }
 453
 454                 return $ret;
 455         }
 456
 457         protected function getExamplesMessages() {
 458                 return [
 459                         'action=query&list=logevents'
 460                                 => 'apihelp-query+logevents-example-simple',
 461                 ];
 462         }
 463
 464         public function getHelpUrls() {
 465                 return 'https://www.mediawiki.org/wiki/Special:MyLanguage/API:Logevents';
 466         }
 467 }