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                 global $wgChangeTagsSchemaMigrationStage;
  46
  47                 $params = $this->extractRequestParams();
  48                 $db = $this->getDB();
  49                 $this->commentStore = CommentStore::getStore();
  50                 $this->requireMaxOneParameter( $params, 'title', 'prefix', 'namespace' );
  51
  52                 $prop = array_flip( $params['prop'] );
  53
  54                 $this->fld_ids = isset( $prop['ids'] );
  55                 $this->fld_title = isset( $prop['title'] );
  56                 $this->fld_type = isset( $prop['type'] );
  57                 $this->fld_user = isset( $prop['user'] );
  58                 $this->fld_userid = isset( $prop['userid'] );
  59                 $this->fld_timestamp = isset( $prop['timestamp'] );
  60                 $this->fld_comment = isset( $prop['comment'] );
  61                 $this->fld_parsedcomment = isset( $prop['parsedcomment'] );
  62                 $this->fld_details = isset( $prop['details'] );
  63                 $this->fld_tags = isset( $prop['tags'] );
  64
  65                 $hideLogs = LogEventsList::getExcludeClause( $db, 'user', $this->getUser() );
  66                 if ( $hideLogs !== false ) {
  67                         $this->addWhere( $hideLogs );
  68                 }
  69
  70                 $actorMigration = ActorMigration::newMigration();
  71                 $actorQuery = $actorMigration->getJoin( 'log_user' );
  72                 $this->addTables( 'logging' );
  73                 $this->addTables( $actorQuery['tables'] );
  74                 $this->addTables( [ 'user', 'page' ] );
  75                 $this->addJoinConds( $actorQuery['joins'] );
  76                 $this->addJoinConds( [
  77                         'user' => [ 'LEFT JOIN',
  78                                 'user_id=' . $actorQuery['fields']['log_user'] ],
  79                         'page' => [ 'LEFT JOIN',
  80                                 [ 'log_namespace=page_namespace',
  81                                         'log_title=page_title' ] ] ] );
  82
  83                 $this->addFields( [
  84                         'log_id',
  85                         'log_type',
  86                         'log_action',
  87                         'log_timestamp',
  88                         'log_deleted',
  89                 ] );
  90
  91                 $this->addFieldsIf( 'page_id', $this->fld_ids );
  92                 // log_page is the page_id saved at log time, whereas page_id is from a
  93                 // join at query time.  This leads to different results in various
  94                 // scenarios, e.g. deletion, recreation.
  95                 $this->addFieldsIf( 'log_page', $this->fld_ids );
  96                 $this->addFieldsIf( $actorQuery['fields'] + [ 'user_name' ], $this->fld_user );
  97                 $this->addFieldsIf( $actorQuery['fields'], $this->fld_userid );
  98                 $this->addFieldsIf(
  99                         [ 'log_namespace', 'log_title' ],
 100                         $this->fld_title || $this->fld_parsedcomment
 101                 );
 102                 $this->addFieldsIf( 'log_params', $this->fld_details );
 103
 104                 if ( $this->fld_comment || $this->fld_parsedcomment ) {
 105                         $commentQuery = $this->commentStore->getJoin( 'log_comment' );
 106                         $this->addTables( $commentQuery['tables'] );
 107                         $this->addFields( $commentQuery['fields'] );
 108                         $this->addJoinConds( $commentQuery['joins'] );
 109                 }
 110
 111                 if ( $this->fld_tags ) {
 112                         $this->addTables( 'tag_summary' );
 113                         $this->addJoinConds( [ 'tag_summary' => [ 'LEFT JOIN', 'log_id=ts_log_id' ] ] );
 114                         $this->addFields( 'ts_tags' );
 115                 }
 116
 117                 if ( !is_null( $params['tag'] ) ) {
 118                         $this->addTables( 'change_tag' );
 119                         $this->addJoinConds( [ 'change_tag' => [ 'INNER JOIN',
 120                                 [ 'log_id=ct_log_id' ] ] ] );
 121                         if ( $wgChangeTagsSchemaMigrationStage > MIGRATION_WRITE_BOTH ) {
 122                                 $changeTagDefStore = MediaWikiServices::getInstance()->getChangeTagDefStore();
 123                                 try {
 124                                         $this->addWhereFld( 'ct_tag_id', $changeTagDefStore->getId( $params['tag'] ) );
 125                                 } catch ( NameTableAccessException $exception ) {
 126                                         // Return nothing.
 127                                         $this->addWhere( '1=0' );
 128                                 }
 129                         } else {
 130                                 $this->addWhereFld( 'ct_tag', $params['tag'] );
 131                         }
 132                 }
 133
 134                 if ( !is_null( $params['action'] ) ) {
 135                         // Do validation of action param, list of allowed actions can contains wildcards
 136                         // Allow the param, when the actions is in the list or a wildcard version is listed.
 137                         $logAction = $params['action'];
 138                         if ( strpos( $logAction, '/' ) === false ) {
 139                                 // all items in the list have a slash
 140                                 $valid = false;
 141                         } else {
 142                                 $logActions = array_flip( $this->getAllowedLogActions() );
 143                                 list( $type, $action ) = explode( '/', $logAction, 2 );
 144                                 $valid = isset( $logActions[$logAction] ) || isset( $logActions[$type . '/*'] );
 145                         }
 146
 147                         if ( !$valid ) {
 148                                 $encParamName = $this->encodeParamName( 'action' );
 149                                 $this->dieWithError(
 150                                         [ 'apierror-unrecognizedvalue', $encParamName, wfEscapeWikiText( $logAction ) ],
 151                                         "unknown_$encParamName"
 152                                 );
 153                         }
 154
 155                         $this->addWhereFld( 'log_type', $type );
 156                         $this->addWhereFld( 'log_action', $action );
 157                 } elseif ( !is_null( $params['type'] ) ) {
 158                         $this->addWhereFld( 'log_type', $params['type'] );
 159                 }
 160
 161                 $this->addTimestampWhereRange(
 162                         'log_timestamp',
 163                         $params['dir'],
 164                         $params['start'],
 165                         $params['end']
 166                 );
 167                 // Include in ORDER BY for uniqueness
 168                 $this->addWhereRange( 'log_id', $params['dir'], null, null );
 169
 170                 if ( !is_null( $params['continue'] ) ) {
 171                         $cont = explode( '|', $params['continue'] );
 172                         $this->dieContinueUsageIf( count( $cont ) != 2 );
 173                         $op = ( $params['dir'] === 'newer' ? '>' : '<' );
 174                         $continueTimestamp = $db->addQuotes( $db->timestamp( $cont[0] ) );
 175                         $continueId = (int)$cont[1];
 176                         $this->dieContinueUsageIf( $continueId != $cont[1] );
 177                         $this->addWhere( "log_timestamp $op $continueTimestamp OR " .
 178                                 "(log_timestamp = $continueTimestamp AND " .
 179                                 "log_id $op= $continueId)"
 180                         );
 181                 }
 182
 183                 $limit = $params['limit'];
 184                 $this->addOption( 'LIMIT', $limit + 1 );
 185
 186                 $user = $params['user'];
 187                 if ( !is_null( $user ) ) {
 188                         // Note the joins in $q are the same as those from ->getJoin() above
 189                         // so we only need to add 'conds' here.
 190                         $q = $actorMigration->getWhere(
 191                                 $db, 'log_user', User::newFromName( $params['user'], false )
 192                         );
 193                         $this->addWhere( $q['conds'] );
 194                 }
 195
 196                 $title = $params['title'];
 197                 if ( !is_null( $title ) ) {
 198                         $titleObj = Title::newFromText( $title );
 199                         if ( is_null( $titleObj ) ) {
 200                                 $this->dieWithError( [ 'apierror-invalidtitle', wfEscapeWikiText( $title ) ] );
 201                         }
 202                         $this->addWhereFld( 'log_namespace', $titleObj->getNamespace() );
 203                         $this->addWhereFld( 'log_title', $titleObj->getDBkey() );
 204                 }
 205
 206                 if ( $params['namespace'] !== null ) {
 207                         $this->addWhereFld( 'log_namespace', $params['namespace'] );
 208                 }
 209
 210                 $prefix = $params['prefix'];
 211
 212                 if ( !is_null( $prefix ) ) {
 213                         if ( $this->getConfig()->get( 'MiserMode' ) ) {
 214                                 $this->dieWithError( 'apierror-prefixsearchdisabled' );
 215                         }
 216
 217                         $title = Title::newFromText( $prefix );
 218                         if ( is_null( $title ) ) {
 219                                 $this->dieWithError( [ 'apierror-invalidtitle', wfEscapeWikiText( $prefix ) ] );
 220                         }
 221                         $this->addWhereFld( 'log_namespace', $title->getNamespace() );
 222                         $this->addWhere( 'log_title ' . $db->buildLike( $title->getDBkey(), $db->anyString() ) );
 223                 }
 224
 225                 // Paranoia: avoid brute force searches (T19342)
 226                 if ( $params['namespace'] !== null || !is_null( $title ) || !is_null( $user ) ) {
 227                         if ( !$this->getUser()->isAllowed( 'deletedhistory' ) ) {
 228                                 $titleBits = LogPage::DELETED_ACTION;
 229                                 $userBits = LogPage::DELETED_USER;
 230                         } elseif ( !$this->getUser()->isAllowedAny( 'suppressrevision', 'viewsuppressed' ) ) {
 231                                 $titleBits = LogPage::DELETED_ACTION | LogPage::DELETED_RESTRICTED;
 232                                 $userBits = LogPage::DELETED_USER | LogPage::DELETED_RESTRICTED;
 233                         } else {
 234                                 $titleBits = 0;
 235                                 $userBits = 0;
 236                         }
 237                         if ( ( $params['namespace'] !== null || !is_null( $title ) ) && $titleBits ) {
 238                                 $this->addWhere( $db->bitAnd( 'log_deleted', $titleBits ) . " != $titleBits" );
 239                         }
 240                         if ( !is_null( $user ) && $userBits ) {
 241                                 $this->addWhere( $db->bitAnd( 'log_deleted', $userBits ) . " != $userBits" );
 242                         }
 243                 }
 244
 245                 $count = 0;
 246                 $res = $this->select( __METHOD__ );
 247                 $result = $this->getResult();
 248                 foreach ( $res as $row ) {
 249                         if ( ++$count > $limit ) {
 250                                 // We've reached the one extra which shows that there are
 251                                 // additional pages to be had. Stop here...
 252                                 $this->setContinueEnumParameter( 'continue', "$row->log_timestamp|$row->log_id" );
 253                                 break;
 254                         }
 255
 256                         $vals = $this->extractRowInfo( $row );
 257                         $fit = $result->addValue( [ 'query', $this->getModuleName() ], null, $vals );
 258                         if ( !$fit ) {
 259                                 $this->setContinueEnumParameter( 'continue', "$row->log_timestamp|$row->log_id" );
 260                                 break;
 261                         }
 262                 }
 263                 $result->addIndexedTagName( [ 'query', $this->getModuleName() ], 'item' );
 264         }
 265
 266         private function extractRowInfo( $row ) {
 267                 $logEntry = DatabaseLogEntry::newFromRow( $row );
 268                 $vals = [
 269                         ApiResult::META_TYPE => 'assoc',
 270                 ];
 271                 $anyHidden = false;
 272                 $user = $this->getUser();
 273
 274                 if ( $this->fld_ids ) {
 275                         $vals['logid'] = intval( $row->log_id );
 276                 }
 277
 278                 if ( $this->fld_title || $this->fld_parsedcomment ) {
 279                         $title = Title::makeTitle( $row->log_namespace, $row->log_title );
 280                 }
 281
 282                 if ( $this->fld_title || $this->fld_ids || $this->fld_details && $row->log_params !== '' ) {
 283                         if ( LogEventsList::isDeleted( $row, LogPage::DELETED_ACTION ) ) {
 284                                 $vals['actionhidden'] = true;
 285                                 $anyHidden = true;
 286                         }
 287                         if ( LogEventsList::userCan( $row, LogPage::DELETED_ACTION, $user ) ) {
 288                                 if ( $this->fld_title ) {
 289                                         ApiQueryBase::addTitleInfo( $vals, $title );
 290                                 }
 291                                 if ( $this->fld_ids ) {
 292                                         $vals['pageid'] = intval( $row->page_id );
 293                                         $vals['logpage'] = intval( $row->log_page );
 294                                 }
 295                                 if ( $this->fld_details ) {
 296                                         $vals['params'] = LogFormatter::newFromEntry( $logEntry )->formatParametersForApi();
 297                                 }
 298                         }
 299                 }
 300
 301                 if ( $this->fld_type ) {
 302                         $vals['type'] = $row->log_type;
 303                         $vals['action'] = $row->log_action;
 304                 }
 305
 306                 if ( $this->fld_user || $this->fld_userid ) {
 307                         if ( LogEventsList::isDeleted( $row, LogPage::DELETED_USER ) ) {
 308                                 $vals['userhidden'] = true;
 309                                 $anyHidden = true;
 310                         }
 311                         if ( LogEventsList::userCan( $row, LogPage::DELETED_USER, $user ) ) {
 312                                 if ( $this->fld_user ) {
 313                                         $vals['user'] = $row->user_name ?? $row->log_user_text;
 314                                 }
 315                                 if ( $this->fld_userid ) {
 316                                         $vals['userid'] = intval( $row->log_user );
 317                                 }
 318
 319                                 if ( !$row->log_user ) {
 320                                         $vals['anon'] = true;
 321                                 }
 322                         }
 323                 }
 324                 if ( $this->fld_timestamp ) {
 325                         $vals['timestamp'] = wfTimestamp( TS_ISO_8601, $row->log_timestamp );
 326                 }
 327
 328                 if ( $this->fld_comment || $this->fld_parsedcomment ) {
 329                         if ( LogEventsList::isDeleted( $row, LogPage::DELETED_COMMENT ) ) {
 330                                 $vals['commenthidden'] = true;
 331                                 $anyHidden = true;
 332                         }
 333                         if ( LogEventsList::userCan( $row, LogPage::DELETED_COMMENT, $user ) ) {
 334                                 $comment = $this->commentStore->getComment( 'log_comment', $row )->text;
 335                                 if ( $this->fld_comment ) {
 336                                         $vals['comment'] = $comment;
 337                                 }
 338
 339                                 if ( $this->fld_parsedcomment ) {
 340                                         $vals['parsedcomment'] = Linker::formatComment( $comment, $title );
 341                                 }
 342                         }
 343                 }
 344
 345                 if ( $this->fld_tags ) {
 346                         if ( $row->ts_tags ) {
 347                                 $tags = explode( ',', $row->ts_tags );
 348                                 ApiResult::setIndexedTagName( $tags, 'tag' );
 349                                 $vals['tags'] = $tags;
 350                         } else {
 351                                 $vals['tags'] = [];
 352                         }
 353                 }
 354
 355                 if ( $anyHidden && LogEventsList::isDeleted( $row, LogPage::DELETED_RESTRICTED ) ) {
 356                         $vals['suppressed'] = true;
 357                 }
 358
 359                 return $vals;
 360         }
 361
 362         /**
 363          * @return array
 364          */
 365         private function getAllowedLogActions() {
 366                 $config = $this->getConfig();
 367                 return array_keys( array_merge(
 368                         $config->get( 'LogActions' ),
 369                         $config->get( 'LogActionsHandlers' )
 370                 ) );
 371         }
 372
 373         public function getCacheMode( $params ) {
 374                 if ( $this->userCanSeeRevDel() ) {
 375                         return 'private';
 376                 }
 377                 if ( !is_null( $params['prop'] ) && in_array( 'parsedcomment', $params['prop'] ) ) {
 378                         // formatComment() calls wfMessage() among other things
 379                         return 'anon-public-user-private';
 380                 } elseif ( LogEventsList::getExcludeClause( $this->getDB(), 'user', $this->getUser() )
 381                         === LogEventsList::getExcludeClause( $this->getDB(), 'public' )
 382                 ) { // Output can only contain public data.
 383                         return 'public';
 384                 } else {
 385                         return 'anon-public-user-private';
 386                 }
 387         }
 388
 389         public function getAllowedParams( $flags = 0 ) {
 390                 $config = $this->getConfig();
 391                 $ret = [
 392                         'prop' => [
 393                                 ApiBase::PARAM_ISMULTI => true,
 394                                 ApiBase::PARAM_DFLT => 'ids|title|type|user|timestamp|comment|details',
 395                                 ApiBase::PARAM_TYPE => [
 396                                         'ids',
 397                                         'title',
 398                                         'type',
 399                                         'user',
 400                                         'userid',
 401                                         'timestamp',
 402                                         'comment',
 403                                         'parsedcomment',
 404                                         'details',
 405                                         'tags'
 406                                 ],
 407                                 ApiBase::PARAM_HELP_MSG_PER_VALUE => [],
 408                         ],
 409                         'type' => [
 410                                 ApiBase::PARAM_TYPE => LogPage::validTypes(),
 411                         ],
 412                         'action' => [
 413                                 // validation on request is done in execute()
 414                                 ApiBase::PARAM_TYPE => ( $flags & ApiBase::GET_VALUES_FOR_HELP )
 415                                         ? $this->getAllowedLogActions()
 416                                         : null
 417                         ],
 418                         'start' => [
 419                                 ApiBase::PARAM_TYPE => 'timestamp'
 420                         ],
 421                         'end' => [
 422                                 ApiBase::PARAM_TYPE => 'timestamp'
 423                         ],
 424                         'dir' => [
 425                                 ApiBase::PARAM_DFLT => 'older',
 426                                 ApiBase::PARAM_TYPE => [
 427                                         'newer',
 428                                         'older'
 429                                 ],
 430                                 ApiBase::PARAM_HELP_MSG => 'api-help-param-direction',
 431                         ],
 432                         'user' => [
 433                                 ApiBase::PARAM_TYPE => 'user',
 434                         ],
 435                         'title' => null,
 436                         'namespace' => [
 437                                 ApiBase::PARAM_TYPE => 'namespace',
 438                                 ApiBase::PARAM_EXTRA_NAMESPACES => [ NS_MEDIA, NS_SPECIAL ],
 439                         ],
 440                         'prefix' => [],
 441                         'tag' => null,
 442                         'limit' => [
 443                                 ApiBase::PARAM_DFLT => 10,
 444                                 ApiBase::PARAM_TYPE => 'limit',
 445                                 ApiBase::PARAM_MIN => 1,
 446                                 ApiBase::PARAM_MAX => ApiBase::LIMIT_BIG1,
 447                                 ApiBase::PARAM_MAX2 => ApiBase::LIMIT_BIG2
 448                         ],
 449                         'continue' => [
 450                                 ApiBase::PARAM_HELP_MSG => 'api-help-param-continue',
 451                         ],
 452                 ];
 453
 454                 if ( $config->get( 'MiserMode' ) ) {
 455                         $ret['prefix'][ApiBase::PARAM_HELP_MSG] = 'api-help-param-disabled-in-miser-mode';
 456                 }
 457
 458                 return $ret;
 459         }
 460
 461         protected function getExamplesMessages() {
 462                 return [
 463                         'action=query&list=logevents'
 464                                 => 'apihelp-query+logevents-example-simple',
 465                 ];
 466         }
 467
 468         public function getHelpUrls() {
 469                 return 'https://www.mediawiki.org/wiki/Special:MyLanguage/API:Logevents';
 470         }
 471 }