includes/logging/LogPager.php

   1 <?php
   2 /**
   3  * Contain classes to list log entries
   4  *
   5  * Copyright © 2004 Brion Vibber <brion@pobox.com>
   6  * https://www.mediawiki.org/
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License as published by
  10  * the Free Software Foundation; either version 2 of the License, or
  11  * (at your option) any later version.
  12  *
  13  * This program is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  16  * GNU General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU General Public License along
  19  * with this program; if not, write to the Free Software Foundation, Inc.,
  20  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  21  * http://www.gnu.org/copyleft/gpl.html
  22  *
  23  * @file
  24  */
  25
  26 use MediaWiki\MediaWikiServices;
  27
  28 /**
  29  * @ingroup Pager
  30  */
  31 class LogPager extends ReverseChronologicalPager {
  32         /** @var array Log types */
  33         private $types = [];
  34
  35         /** @var string Events limited to those by performer when set */
  36         private $performer = '';
  37
  38         /** @var string|Title Events limited to those about Title when set */
  39         private $title = '';
  40
  41         /** @var bool */
  42         private $pattern = false;
  43
  44         /** @var string */
  45         private $typeCGI = '';
  46
  47         /** @var string */
  48         private $action = '';
  49
  50         /** @var bool */
  51         private $performerRestrictionsEnforced = false;
  52
  53         /** @var bool */
  54         private $actionRestrictionsEnforced = false;
  55
  56         /** @var array */
  57         private $mConds;
  58
  59         /** @var string */
  60         private $mTagFilter;
  61
  62         /** @var LogEventsList */
  63         public $mLogEventsList;
  64
  65         /**
  66          * @param LogEventsList $list
  67          * @param string|array $types Log types to show
  68          * @param string $performer The user who made the log entries
  69          * @param string|Title $title The page title the log entries are for
  70          * @param bool $pattern Do a prefix search rather than an exact title match
  71          * @param array $conds Extra conditions for the query
  72          * @param int|bool $year The year to start from. Default: false
  73          * @param int|bool $month The month to start from. Default: false
  74          * @param int|bool $day The day to start from. Default: false
  75          * @param string $tagFilter Tag
  76          * @param string $action Specific action (subtype) requested
  77          * @param int $logId Log entry ID, to limit to a single log entry.
  78          */
  79         public function __construct( $list, $types = [], $performer = '', $title = '',
  80                 $pattern = false, $conds = [], $year = false, $month = false, $day = false,
  81                 $tagFilter = '', $action = '', $logId = 0
  82         ) {
  83                 parent::__construct( $list->getContext() );
  84                 $this->mConds = $conds;
  85
  86                 $this->mLogEventsList = $list;
  87
  88                 $this->limitType( $types ); // also excludes hidden types
  89                 $this->limitPerformer( $performer );
  90                 $this->limitTitle( $title, $pattern );
  91                 $this->limitAction( $action );
  92                 $this->getDateCond( $year, $month, $day );
  93                 $this->mTagFilter = $tagFilter;
  94                 $this->limitLogId( $logId );
  95
  96                 $this->mDb = wfGetDB( DB_REPLICA, 'logpager' );
  97         }
  98
  99         public function getDefaultQuery() {
 100                 $query = parent::getDefaultQuery();
 101                 $query['type'] = $this->typeCGI; // arrays won't work here
 102                 $query['user'] = $this->performer;
 103                 $query['day'] = $this->mDay;
 104                 $query['month'] = $this->mMonth;
 105                 $query['year'] = $this->mYear;
 106
 107                 return $query;
 108         }
 109
 110         // Call ONLY after calling $this->limitType() already!
 111         public function getFilterParams() {
 112                 global $wgFilterLogTypes;
 113                 $filters = [];
 114                 if ( count( $this->types ) ) {
 115                         return $filters;
 116                 }
 117
 118                 $wpfilters = $this->getRequest()->getArray( "wpfilters" );
 119                 $request_filters = $wpfilters === null ? [] : $wpfilters;
 120
 121                 foreach ( $wgFilterLogTypes as $type => $default ) {
 122                         $hide = !in_array( $type, $request_filters );
 123
 124                         // Back-compat: Check old URL params if the new param wasn't passed
 125                         if ( $wpfilters === null ) {
 126                                 $hide = $this->getRequest()->getBool( "hide_{$type}_log", $default );
 127                         }
 128
 129                         $filters[$type] = $hide;
 130                         if ( $hide ) {
 131                                 $this->mConds[] = 'log_type != ' . $this->mDb->addQuotes( $type );
 132                         }
 133                 }
 134
 135                 return $filters;
 136         }
 137
 138         /**
 139          * Set the log reader to return only entries of the given type.
 140          * Type restrictions enforced here
 141          *
 142          * @param string|array $types Log types ('upload', 'delete', etc);
 143          *   empty string means no restriction
 144          */
 145         private function limitType( $types ) {
 146                 global $wgLogRestrictions;
 147
 148                 $user = $this->getUser();
 149                 // If $types is not an array, make it an array
 150                 $types = ( $types === '' ) ? [] : (array)$types;
 151                 // Don't even show header for private logs; don't recognize it...
 152                 $needReindex = false;
 153                 foreach ( $types as $type ) {
 154                         if ( isset( $wgLogRestrictions[$type] )
 155                                 && !MediaWikiServices::getInstance()
 156                                         ->getPermissionManager()
 157                                         ->userHasRight( $user, $wgLogRestrictions[$type] )
 158                         ) {
 159                                 $needReindex = true;
 160                                 $types = array_diff( $types, [ $type ] );
 161                         }
 162                 }
 163                 if ( $needReindex ) {
 164                         // Lots of this code makes assumptions that
 165                         // the first entry in the array is $types[0].
 166                         $types = array_values( $types );
 167                 }
 168                 $this->types = $types;
 169                 // Don't show private logs to unprivileged users.
 170                 // Also, only show them upon specific request to avoid suprises.
 171                 $audience = $types ? 'user' : 'public';
 172                 $hideLogs = LogEventsList::getExcludeClause( $this->mDb, $audience, $user );
 173                 if ( $hideLogs !== false ) {
 174                         $this->mConds[] = $hideLogs;
 175                 }
 176                 if ( count( $types ) ) {
 177                         $this->mConds['log_type'] = $types;
 178                         // Set typeCGI; used in url param for paging
 179                         if ( count( $types ) == 1 ) {
 180                                 $this->typeCGI = $types[0];
 181                         }
 182                 }
 183         }
 184
 185         /**
 186          * Set the log reader to return only entries by the given user.
 187          *
 188          * @param string $name (In)valid user name
 189          * @return void
 190          */
 191         private function limitPerformer( $name ) {
 192                 if ( $name == '' ) {
 193                         return;
 194                 }
 195                 $usertitle = Title::makeTitleSafe( NS_USER, $name );
 196                 if ( is_null( $usertitle ) ) {
 197                         return;
 198                 }
 199                 // Normalize username first so that non-existent users used
 200                 // in maintenance scripts work
 201                 $name = $usertitle->getText();
 202
 203                 // Assume no joins required for log_user
 204                 $this->mConds[] = ActorMigration::newMigration()->getWhere(
 205                         wfGetDB( DB_REPLICA ), 'log_user', User::newFromName( $name, false )
 206                 )['conds'];
 207
 208                 $this->enforcePerformerRestrictions();
 209
 210                 $this->performer = $name;
 211         }
 212
 213         /**
 214          * Set the log reader to return only entries affecting the given page.
 215          * (For the block and rights logs, this is a user page.)
 216          *
 217          * @param string|Title $page Title name
 218          * @param bool $pattern
 219          * @return void
 220          */
 221         private function limitTitle( $page, $pattern ) {
 222                 global $wgMiserMode, $wgUserrightsInterwikiDelimiter;
 223
 224                 if ( $page instanceof Title ) {
 225                         $title = $page;
 226                 } else {
 227                         $title = Title::newFromText( $page );
 228                         if ( strlen( $page ) == 0 || !$title instanceof Title ) {
 229                                 return;
 230                         }
 231                 }
 232
 233                 $this->title = $title->getPrefixedText();
 234                 $ns = $title->getNamespace();
 235                 $db = $this->mDb;
 236
 237                 $doUserRightsLogLike = false;
 238                 if ( $this->types == [ 'rights' ] ) {
 239                         $parts = explode( $wgUserrightsInterwikiDelimiter, $title->getDBkey() );
 240                         if ( count( $parts ) == 2 ) {
 241                                 list( $name, $database ) = array_map( 'trim', $parts );
 242                                 if ( strstr( $database, '*' ) ) { // Search for wildcard in database name
 243                                         $doUserRightsLogLike = true;
 244                                 }
 245                         }
 246                 }
 247
 248                 /**
 249                  * Using the (log_namespace, log_title, log_timestamp) index with a
 250                  * range scan (LIKE) on the first two parts, instead of simple equality,
 251                  * makes it unusable for sorting.  Sorted retrieval using another index
 252                  * would be possible, but then we might have to scan arbitrarily many
 253                  * nodes of that index. Therefore, we need to avoid this if $wgMiserMode
 254                  * is on.
 255                  *
 256                  * This is not a problem with simple title matches, because then we can
 257                  * use the page_time index.  That should have no more than a few hundred
 258                  * log entries for even the busiest pages, so it can be safely scanned
 259                  * in full to satisfy an impossible condition on user or similar.
 260                  */
 261                 $this->mConds['log_namespace'] = $ns;
 262                 if ( $doUserRightsLogLike ) {
 263                         $params = [ $name . $wgUserrightsInterwikiDelimiter ];
 264                         foreach ( explode( '*', $database ) as $databasepart ) {
 265                                 $params[] = $databasepart;
 266                                 $params[] = $db->anyString();
 267                         }
 268                         array_pop( $params ); // Get rid of the last % we added.
 269                         $this->mConds[] = 'log_title' . $db->buildLike( ...$params );
 270                 } elseif ( $pattern && !$wgMiserMode ) {
 271                         $this->mConds[] = 'log_title' . $db->buildLike( $title->getDBkey(), $db->anyString() );
 272                         $this->pattern = $pattern;
 273                 } else {
 274                         $this->mConds['log_title'] = $title->getDBkey();
 275                 }
 276                 $this->enforceActionRestrictions();
 277         }
 278
 279         /**
 280          * Set the log_action field to a specified value (or values)
 281          *
 282          * @param string $action
 283          */
 284         private function limitAction( $action ) {
 285                 global $wgActionFilteredLogs;
 286                 // Allow to filter the log by actions
 287                 $type = $this->typeCGI;
 288                 if ( $type === '' ) {
 289                         // nothing to do
 290                         return;
 291                 }
 292                 $actions = $wgActionFilteredLogs;
 293                 if ( isset( $actions[$type] ) ) {
 294                         // log type can be filtered by actions
 295                         $this->mLogEventsList->setAllowedActions( array_keys( $actions[$type] ) );
 296                         if ( $action !== '' && isset( $actions[$type][$action] ) ) {
 297                                 // add condition to query
 298                                 $this->mConds['log_action'] = $actions[$type][$action];
 299                                 $this->action = $action;
 300                         }
 301                 }
 302         }
 303
 304         /**
 305          * Limit to the (single) specified log ID.
 306          * @param int $logId The log entry ID.
 307          */
 308         protected function limitLogId( $logId ) {
 309                 if ( !$logId ) {
 310                         return;
 311                 }
 312                 $this->mConds['log_id'] = $logId;
 313         }
 314
 315         /**
 316          * Constructs the most part of the query. Extra conditions are sprinkled in
 317          * all over this class.
 318          * @return array
 319          */
 320         public function getQueryInfo() {
 321                 $basic = DatabaseLogEntry::getSelectQueryData();
 322
 323                 $tables = $basic['tables'];
 324                 $fields = $basic['fields'];
 325                 $conds = $basic['conds'];
 326                 $options = $basic['options'];
 327                 $joins = $basic['join_conds'];
 328
 329                 # Add log_search table if there are conditions on it.
 330                 # This filters the results to only include log rows that have
 331                 # log_search records with the specified ls_field and ls_value values.
 332                 if ( array_key_exists( 'ls_field', $this->mConds ) ) {
 333                         $tables[] = 'log_search';
 334                         $options['IGNORE INDEX'] = [ 'log_search' => 'ls_log_id' ];
 335                         $options['USE INDEX'] = [ 'logging' => 'PRIMARY' ];
 336                         if ( !$this->hasEqualsClause( 'ls_field' )
 337                                 || !$this->hasEqualsClause( 'ls_value' )
 338                         ) {
 339                                 # Since (ls_field,ls_value,ls_logid) is unique, if the condition is
 340                                 # to match a specific (ls_field,ls_value) tuple, then there will be
 341                                 # no duplicate log rows. Otherwise, we need to remove the duplicates.
 342                                 $options[] = 'DISTINCT';
 343                         }
 344                 }
 345                 # Don't show duplicate rows when using log_search
 346                 $joins['log_search'] = [ 'JOIN', 'ls_log_id=log_id' ];
 347
 348                 // T221458: MySQL/MariaDB (10.1.37) can sometimes irrationally decide that querying `actor` before
 349                 // `logging` and filesorting is somehow better than querying $limit+1 rows from `logging`.
 350                 // Tell it not to reorder the query. But not when tag filtering or log_search was used, as it
 351                 // seems as likely to be harmed as helped in that case.
 352                 if ( !$this->mTagFilter && !array_key_exists( 'ls_field', $this->mConds ) ) {
 353                         $options[] = 'STRAIGHT_JOIN';
 354                 }
 355
 356                 $info = [
 357                         'tables' => $tables,
 358                         'fields' => $fields,
 359                         'conds' => array_merge( $conds, $this->mConds ),
 360                         'options' => $options,
 361                         'join_conds' => $joins,
 362                 ];
 363                 # Add ChangeTags filter query
 364                 ChangeTags::modifyDisplayQuery( $info['tables'], $info['fields'], $info['conds'],
 365                         $info['join_conds'], $info['options'], $this->mTagFilter );
 366
 367                 return $info;
 368         }
 369
 370         /**
 371          * Checks if $this->mConds has $field matched to a *single* value
 372          * @param string $field
 373          * @return bool
 374          */
 375         protected function hasEqualsClause( $field ) {
 376                 return (
 377                         array_key_exists( $field, $this->mConds ) &&
 378                         ( !is_array( $this->mConds[$field] ) || count( $this->mConds[$field] ) == 1 )
 379                 );
 380         }
 381
 382         function getIndexField() {
 383                 return 'log_timestamp';
 384         }
 385
 386         protected function getStartBody() {
 387                 # Do a link batch query
 388                 if ( $this->getNumRows() > 0 ) {
 389                         $lb = new LinkBatch;
 390                         foreach ( $this->mResult as $row ) {
 391                                 $lb->add( $row->log_namespace, $row->log_title );
 392                                 $lb->addObj( Title::makeTitleSafe( NS_USER, $row->user_name ) );
 393                                 $lb->addObj( Title::makeTitleSafe( NS_USER_TALK, $row->user_name ) );
 394                                 $formatter = LogFormatter::newFromRow( $row );
 395                                 foreach ( $formatter->getPreloadTitles() as $title ) {
 396                                         $lb->addObj( $title );
 397                                 }
 398                         }
 399                         $lb->execute();
 400                         $this->mResult->seek( 0 );
 401                 }
 402
 403                 return '';
 404         }
 405
 406         public function formatRow( $row ) {
 407                 return $this->mLogEventsList->logLine( $row );
 408         }
 409
 410         public function getType() {
 411                 return $this->types;
 412         }
 413
 414         /**
 415          * Guaranteed to either return a valid title string or a Zero-Length String
 416          *
 417          * @return string
 418          */
 419         public function getPerformer() {
 420                 return $this->performer;
 421         }
 422
 423         /**
 424          * @return string
 425          */
 426         public function getPage() {
 427                 return $this->title;
 428         }
 429
 430         /**
 431          * @return bool
 432          */
 433         public function getPattern() {
 434                 return $this->pattern;
 435         }
 436
 437         public function getYear() {
 438                 return $this->mYear;
 439         }
 440
 441         public function getMonth() {
 442                 return $this->mMonth;
 443         }
 444
 445         public function getDay() {
 446                 return $this->mDay;
 447         }
 448
 449         public function getTagFilter() {
 450                 return $this->mTagFilter;
 451         }
 452
 453         public function getAction() {
 454                 return $this->action;
 455         }
 456
 457         public function doQuery() {
 458                 // Workaround MySQL optimizer bug
 459                 $this->mDb->setBigSelects();
 460                 parent::doQuery();
 461                 $this->mDb->setBigSelects( 'default' );
 462         }
 463
 464         /**
 465          * Paranoia: avoid brute force searches (T19342)
 466          */
 467         private function enforceActionRestrictions() {
 468                 if ( $this->actionRestrictionsEnforced ) {
 469                         return;
 470                 }
 471                 $this->actionRestrictionsEnforced = true;
 472                 $user = $this->getUser();
 473                 $permissionManager = MediaWikiServices::getInstance()->getPermissionManager();
 474                 if ( !$permissionManager->userHasRight( $user, 'deletedhistory' ) ) {
 475                         $this->mConds[] = $this->mDb->bitAnd( 'log_deleted', LogPage::DELETED_ACTION ) . ' = 0';
 476                 } elseif ( !$permissionManager->userHasAnyRight( $user, 'suppressrevision', 'viewsuppressed' ) ) {
 477                         $this->mConds[] = $this->mDb->bitAnd( 'log_deleted', LogPage::SUPPRESSED_ACTION ) .
 478                                 ' != ' . LogPage::SUPPRESSED_USER;
 479                 }
 480         }
 481
 482         /**
 483          * Paranoia: avoid brute force searches (T19342)
 484          */
 485         private function enforcePerformerRestrictions() {
 486                 // Same as enforceActionRestrictions(), except for _USER instead of _ACTION bits.
 487                 if ( $this->performerRestrictionsEnforced ) {
 488                         return;
 489                 }
 490                 $this->performerRestrictionsEnforced = true;
 491                 $user = $this->getUser();
 492                 $permissionManager = MediaWikiServices::getInstance()->getPermissionManager();
 493                 if ( !$permissionManager->userHasRight( $user, 'deletedhistory' ) ) {
 494                         $this->mConds[] = $this->mDb->bitAnd( 'log_deleted', LogPage::DELETED_USER ) . ' = 0';
 495                 } elseif ( !$permissionManager->userHasAnyRight( $user, 'suppressrevision', 'viewsuppressed' ) ) {
 496                         $this->mConds[] = $this->mDb->bitAnd( 'log_deleted', LogPage::SUPPRESSED_USER ) .
 497                                 ' != ' . LogPage::SUPPRESSED_ACTION;
 498                 }
 499         }
 500 }