includes/logging/LogEventsList.php

   1 <?php
   2 /**
   3  * Contain classes to list log entries
   4  *
   5  * Copyright © 2004 Brion Vibber <brion@pobox.com>, 2008 Aaron Schulz
   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 class LogEventsList extends ContextSource {
  27         const NO_ACTION_LINK = 1;
  28         const NO_EXTRA_USER_LINKS = 2;
  29         const USE_REVDEL_CHECKBOXES = 4;
  30
  31         public $flags;
  32
  33         /**
  34          * @var array
  35          */
  36         protected $mDefaultQuery;
  37
  38         /**
  39          * Constructor.
  40          * The first two parameters used to be $skin and $out, but now only a context
  41          * is needed, that's why there's a second unused parameter.
  42          *
  43          * @param IContextSource|Skin $context Context to use; formerly it was
  44          *   a Skin object. Use of Skin is deprecated.
  45          * @param null $unused Unused; used to be an OutputPage object.
  46          * @param int $flags Can be a combination of self::NO_ACTION_LINK,
  47          *   self::NO_EXTRA_USER_LINKS or self::USE_REVDEL_CHECKBOXES.
  48          */
  49         public function __construct( $context, $unused = null, $flags = 0 ) {
  50                 if ( $context instanceof IContextSource ) {
  51                         $this->setContext( $context );
  52                 } else {
  53                         // Old parameters, $context should be a Skin object
  54                         $this->setContext( $context->getContext() );
  55                 }
  56
  57                 $this->flags = $flags;
  58         }
  59
  60         /**
  61          * Deprecated alias for getTitle(); do not use.
  62          *
  63          * @deprecated since 1.20; use getTitle() instead.
  64          * @return Title
  65          */
  66         public function getDisplayTitle() {
  67                 wfDeprecated( __METHOD__, '1.20' );
  68                 return $this->getTitle();
  69         }
  70
  71         /**
  72          * Set page title and show header for this log type
  73          * @param array $type
  74          * @deprecated since 1.19
  75          */
  76         public function showHeader( $type ) {
  77                 wfDeprecated( __METHOD__, '1.19' );
  78                 // If only one log type is used, then show a special message...
  79                 $headerType = count( $type ) == 1 ? $type[0] : '';
  80                 $out = $this->getOutput();
  81                 if ( LogPage::isLogType( $headerType ) ) {
  82                         $page = new LogPage( $headerType );
  83                         $out->setPageTitle( $page->getName()->text() );
  84                         $out->addHTML( $page->getDescription()->parseAsBlock() );
  85                 } else {
  86                         $out->addHTML( $this->msg( 'alllogstext' )->parse() );
  87                 }
  88         }
  89
  90         /**
  91          * Show options for the log list
  92          *
  93          * @param array|string $types
  94          * @param string $user
  95          * @param string $page
  96          * @param string $pattern
  97          * @param int $year Year
  98          * @param int $month Month
  99          * @param array $filter
 100          * @param string $tagFilter Tag to select by default
 101          */
 102         public function showOptions( $types = array(), $user = '', $page = '', $pattern = '', $year = 0,
 103                 $month = 0, $filter = null, $tagFilter = ''
 104         ) {
 105                 global $wgScript, $wgMiserMode;
 106
 107                 $title = SpecialPage::getTitleFor( 'Log' );
 108
 109                 // For B/C, we take strings, but make sure they are converted...
 110                 $types = ( $types === '' ) ? array() : (array)$types;
 111
 112                 $tagSelector = ChangeTags::buildTagFilterSelector( $tagFilter );
 113
 114                 $html = Html::hidden( 'title', $title->getPrefixedDBkey() );
 115
 116                 // Basic selectors
 117                 $html .= $this->getTypeMenu( $types ) . "\n";
 118                 $html .= $this->getUserInput( $user ) . "\n";
 119                 $html .= $this->getTitleInput( $page ) . "\n";
 120                 $html .= $this->getExtraInputs( $types ) . "\n";
 121
 122                 // Title pattern, if allowed
 123                 if ( !$wgMiserMode ) {
 124                         $html .= $this->getTitlePattern( $pattern ) . "\n";
 125                 }
 126
 127                 // date menu
 128                 $html .= Xml::tags( 'p', null, Xml::dateMenu( (int)$year, (int)$month ) );
 129
 130                 // Tag filter
 131                 if ( $tagSelector ) {
 132                         $html .= Xml::tags( 'p', null, implode( '&#160;', $tagSelector ) );
 133                 }
 134
 135                 // Filter links
 136                 if ( $filter ) {
 137                         $html .= Xml::tags( 'p', null, $this->getFilterLinks( $filter ) );
 138                 }
 139
 140                 // Submit button
 141                 $html .= Xml::submitButton( $this->msg( 'allpagessubmit' )->text() );
 142
 143                 // Fieldset
 144                 $html = Xml::fieldset( $this->msg( 'log' )->text(), $html );
 145
 146                 // Form wrapping
 147                 $html = Xml::tags( 'form', array( 'action' => $wgScript, 'method' => 'get' ), $html );
 148
 149                 $this->getOutput()->addHTML( $html );
 150         }
 151
 152         /**
 153          * @param array $filter
 154          * @return string Formatted HTML
 155          */
 156         private function getFilterLinks( $filter ) {
 157                 // show/hide links
 158                 $messages = array( $this->msg( 'show' )->escaped(), $this->msg( 'hide' )->escaped() );
 159                 // Option value -> message mapping
 160                 $links = array();
 161                 $hiddens = ''; // keep track for "go" button
 162                 foreach ( $filter as $type => $val ) {
 163                         // Should the below assignment be outside the foreach?
 164                         // Then it would have to be copied. Not certain what is more expensive.
 165                         $query = $this->getDefaultQuery();
 166                         $queryKey = "hide_{$type}_log";
 167
 168                         $hideVal = 1 - intval( $val );
 169                         $query[$queryKey] = $hideVal;
 170
 171                         $link = Linker::linkKnown(
 172                                 $this->getTitle(),
 173                                 $messages[$hideVal],
 174                                 array(),
 175                                 $query
 176                         );
 177
 178                         // Message: log-show-hide-patrol
 179                         $links[$type] = $this->msg( "log-show-hide-{$type}" )->rawParams( $link )->escaped();
 180                         $hiddens .= Html::hidden( "hide_{$type}_log", $val ) . "\n";
 181                 }
 182
 183                 // Build links
 184                 return '<small>' . $this->getLanguage()->pipeList( $links ) . '</small>' . $hiddens;
 185         }
 186
 187         private function getDefaultQuery() {
 188                 if ( !isset( $this->mDefaultQuery ) ) {
 189                         $this->mDefaultQuery = $this->getRequest()->getQueryValues();
 190                         unset( $this->mDefaultQuery['title'] );
 191                         unset( $this->mDefaultQuery['dir'] );
 192                         unset( $this->mDefaultQuery['offset'] );
 193                         unset( $this->mDefaultQuery['limit'] );
 194                         unset( $this->mDefaultQuery['order'] );
 195                         unset( $this->mDefaultQuery['month'] );
 196                         unset( $this->mDefaultQuery['year'] );
 197                 }
 198
 199                 return $this->mDefaultQuery;
 200         }
 201
 202         /**
 203          * @param array $queryTypes
 204          * @return string Formatted HTML
 205          */
 206         private function getTypeMenu( $queryTypes ) {
 207                 $queryType = count( $queryTypes ) == 1 ? $queryTypes[0] : '';
 208                 $selector = $this->getTypeSelector();
 209                 $selector->setDefault( $queryType );
 210
 211                 return $selector->getHtml();
 212         }
 213
 214         /**
 215          * Returns log page selector.
 216          * @return XmlSelect
 217          * @since 1.19
 218          */
 219         public function getTypeSelector() {
 220                 $typesByName = array(); // Temporary array
 221                 // First pass to load the log names
 222                 foreach ( LogPage::validTypes() as $type ) {
 223                         $page = new LogPage( $type );
 224                         $restriction = $page->getRestriction();
 225                         if ( $this->getUser()->isAllowed( $restriction ) ) {
 226                                 $typesByName[$type] = $page->getName()->text();
 227                         }
 228                 }
 229
 230                 // Second pass to sort by name
 231                 asort( $typesByName );
 232
 233                 // Always put "All public logs" on top
 234                 $public = $typesByName[''];
 235                 unset( $typesByName[''] );
 236                 $typesByName = array( '' => $public ) + $typesByName;
 237
 238                 $select = new XmlSelect( 'type' );
 239                 foreach ( $typesByName as $type => $name ) {
 240                         $select->addOption( $name, $type );
 241                 }
 242
 243                 return $select;
 244         }
 245
 246         /**
 247          * @param string $user
 248          * @return string Formatted HTML
 249          */
 250         private function getUserInput( $user ) {
 251                 $label = Xml::inputLabel(
 252                         $this->msg( 'specialloguserlabel' )->text(),
 253                         'user',
 254                         'mw-log-user',
 255                         15,
 256                         $user
 257                 );
 258
 259                 return '<span style="white-space: nowrap">' . $label . '</span>';
 260         }
 261
 262         /**
 263          * @param string $title
 264          * @return string Formatted HTML
 265          */
 266         private function getTitleInput( $title ) {
 267                 $label = Xml::inputLabel(
 268                         $this->msg( 'speciallogtitlelabel' )->text(),
 269                         'page',
 270                         'mw-log-page',
 271                         20,
 272                         $title
 273                 );
 274
 275                 return '<span style="white-space: nowrap">' . $label .  '</span>';
 276         }
 277
 278         /**
 279          * @param string $pattern
 280          * @return string Checkbox
 281          */
 282         private function getTitlePattern( $pattern ) {
 283                 return '<span style="white-space: nowrap">' .
 284                         Xml::checkLabel( $this->msg( 'log-title-wildcard' )->text(), 'pattern', 'pattern', $pattern ) .
 285                         '</span>';
 286         }
 287
 288         /**
 289          * @param array $types
 290          * @return string
 291          */
 292         private function getExtraInputs( $types ) {
 293                 $offender = $this->getRequest()->getVal( 'offender' );
 294                 $user = User::newFromName( $offender, false );
 295                 if ( !$user || ( $user->getId() == 0 && !IP::isIPAddress( $offender ) ) ) {
 296                         $offender = ''; // Blank field if invalid
 297                 }
 298                 if ( count( $types ) == 1 && $types[0] == 'suppress' ) {
 299                         return Xml::inputLabel( $this->msg( 'revdelete-offender' )->text(), 'offender',
 300                                 'mw-log-offender', 20, $offender );
 301                 }
 302
 303                 return '';
 304         }
 305
 306         /**
 307          * @return string
 308          */
 309         public function beginLogEventsList() {
 310                 return "<ul>\n";
 311         }
 312
 313         /**
 314          * @return string
 315          */
 316         public function endLogEventsList() {
 317                 return "</ul>\n";
 318         }
 319
 320         /**
 321          * @param stdClass $row A single row from the result set
 322          * @return string Formatted HTML list item
 323          */
 324         public function logLine( $row ) {
 325                 $entry = DatabaseLogEntry::newFromRow( $row );
 326                 $formatter = LogFormatter::newFromEntry( $entry );
 327                 $formatter->setContext( $this->getContext() );
 328                 $formatter->setShowUserToolLinks( !( $this->flags & self::NO_EXTRA_USER_LINKS ) );
 329
 330                 $time = htmlspecialchars( $this->getLanguage()->userTimeAndDate(
 331                         $entry->getTimestamp(), $this->getUser() ) );
 332
 333                 $action = $formatter->getActionText();
 334
 335                 if ( $this->flags & self::NO_ACTION_LINK ) {
 336                         $revert = '';
 337                 } else {
 338                         $revert = $formatter->getActionLinks();
 339                         if ( $revert != '' ) {
 340                                 $revert = '<span class="mw-logevent-actionlink">' . $revert . '</span>';
 341                         }
 342                 }
 343
 344                 $comment = $formatter->getComment();
 345
 346                 // Some user can hide log items and have review links
 347                 $del = $this->getShowHideLinks( $row );
 348
 349                 // Any tags...
 350                 list( $tagDisplay, $newClasses ) = ChangeTags::formatSummaryRow( $row->ts_tags, 'logevent' );
 351                 $classes = array_merge(
 352                         array( 'mw-logline-' . $entry->getType() ),
 353                         $newClasses
 354                 );
 355
 356                 return Html::rawElement( 'li', array( 'class' => $classes ),
 357                         "$del $time $action $comment $revert $tagDisplay" ) . "\n";
 358         }
 359
 360         /**
 361          * @param stdClass $row Row
 362          * @return string
 363          */
 364         private function getShowHideLinks( $row ) {
 365                 // We don't want to see the links and
 366                 // no one can hide items from the suppress log.
 367                 if ( ( $this->flags == self::NO_ACTION_LINK )
 368                         || $row->log_type == 'suppress'
 369                 ) {
 370                         return '';
 371                 }
 372                 $del = '';
 373                 $user = $this->getUser();
 374                 // Don't show useless checkbox to people who cannot hide log entries
 375                 if ( $user->isAllowed( 'deletedhistory' ) ) {
 376                         $canHide = $user->isAllowed( 'deletelogentry' );
 377                         if ( $row->log_deleted || $canHide ) {
 378                                 // Show checkboxes instead of links.
 379                                 if ( $canHide && $this->flags & self::USE_REVDEL_CHECKBOXES ) {
 380                                         // If event was hidden from sysops
 381                                         if ( !self::userCan( $row, LogPage::DELETED_RESTRICTED, $user ) ) {
 382                                                 $del = Xml::check( 'deleterevisions', false, array( 'disabled' => 'disabled' ) );
 383                                         } else {
 384                                                 $del = Xml::check(
 385                                                         'showhiderevisions',
 386                                                         false,
 387                                                         array( 'name' => 'ids[' . $row->log_id . ']' )
 388                                                 );
 389                                         }
 390                                 } else {
 391                                         // If event was hidden from sysops
 392                                         if ( !self::userCan( $row, LogPage::DELETED_RESTRICTED, $user ) ) {
 393                                                 $del = Linker::revDeleteLinkDisabled( $canHide );
 394                                         } else {
 395                                                 $query = array(
 396                                                         'target' => SpecialPage::getTitleFor( 'Log', $row->log_type )->getPrefixedDBkey(),
 397                                                         'type' => 'logging',
 398                                                         'ids' => $row->log_id,
 399                                                 );
 400                                                 $del = Linker::revDeleteLink(
 401                                                         $query,
 402                                                         self::isDeleted( $row, LogPage::DELETED_RESTRICTED ),
 403                                                         $canHide
 404                                                 );
 405                                         }
 406                                 }
 407                         }
 408                 }
 409
 410                 return $del;
 411         }
 412
 413         /**
 414          * @param stdClass $row Row
 415          * @param string|array $type
 416          * @param string|array $action
 417          * @param string $right
 418          * @return bool
 419          */
 420         public static function typeAction( $row, $type, $action, $right = '' ) {
 421                 $match = is_array( $type ) ?
 422                         in_array( $row->log_type, $type ) : $row->log_type == $type;
 423                 if ( $match ) {
 424                         $match = is_array( $action ) ?
 425                                 in_array( $row->log_action, $action ) : $row->log_action == $action;
 426                         if ( $match && $right ) {
 427                                 global $wgUser;
 428                                 $match = $wgUser->isAllowed( $right );
 429                         }
 430                 }
 431
 432                 return $match;
 433         }
 434
 435         /**
 436          * Determine if the current user is allowed to view a particular
 437          * field of this log row, if it's marked as deleted.
 438          *
 439          * @param stdClass $row Row
 440          * @param int $field
 441          * @param User $user User to check, or null to use $wgUser
 442          * @return bool
 443          */
 444         public static function userCan( $row, $field, User $user = null ) {
 445                 return self::userCanBitfield( $row->log_deleted, $field, $user );
 446         }
 447
 448         /**
 449          * Determine if the current user is allowed to view a particular
 450          * field of this log row, if it's marked as deleted.
 451          *
 452          * @param int $bitfield Current field
 453          * @param int $field
 454          * @param User $user User to check, or null to use $wgUser
 455          * @return bool
 456          */
 457         public static function userCanBitfield( $bitfield, $field, User $user = null ) {
 458                 if ( $bitfield & $field ) {
 459                         if ( $bitfield & LogPage::DELETED_RESTRICTED ) {
 460                                 $permission = 'suppressrevision';
 461                         } else {
 462                                 $permission = 'deletedhistory';
 463                         }
 464                         wfDebug( "Checking for $permission due to $field match on $bitfield\n" );
 465                         if ( $user === null ) {
 466                                 global $wgUser;
 467                                 $user = $wgUser;
 468                         }
 469
 470                         return $user->isAllowed( $permission );
 471                 }
 472
 473                 return true;
 474         }
 475
 476         /**
 477          * @param stdClass $row Row
 478          * @param int $field One of DELETED_* bitfield constants
 479          * @return bool
 480          */
 481         public static function isDeleted( $row, $field ) {
 482                 return ( $row->log_deleted & $field ) == $field;
 483         }
 484
 485         /**
 486          * Show log extract. Either with text and a box (set $msgKey) or without (don't set $msgKey)
 487          *
 488          * @param OutputPage|string $out By-reference
 489          * @param string|array $types Log types to show
 490          * @param string|Title $page The page title to show log entries for
 491          * @param string $user The user who made the log entries
 492          * @param array $param Associative Array with the following additional options:
 493          * - lim Integer Limit of items to show, default is 50
 494          * - conds Array Extra conditions for the query (e.g. "log_action != 'revision'")
 495          * - showIfEmpty boolean Set to false if you don't want any output in case the loglist is empty
 496          *   if set to true (default), "No matching items in log" is displayed if loglist is empty
 497          * - msgKey Array If you want a nice box with a message, set this to the key of the message.
 498          *   First element is the message key, additional optional elements are parameters for the key
 499          *   that are processed with wfMessage
 500          * - offset Set to overwrite offset parameter in WebRequest
 501          *   set to '' to unset offset
 502          * - wrap String Wrap the message in html (usually something like "<div ...>$1</div>").
 503          * - flags Integer display flags (NO_ACTION_LINK,NO_EXTRA_USER_LINKS)
 504          * - useRequestParams boolean Set true to use Pager-related parameters in the WebRequest
 505          * - useMaster boolean Use master DB
 506          * @return int Number of total log items (not limited by $lim)
 507          */
 508         public static function showLogExtract(
 509                 &$out, $types = array(), $page = '', $user = '', $param = array()
 510         ) {
 511                 $defaultParameters = array(
 512                         'lim' => 25,
 513                         'conds' => array(),
 514                         'showIfEmpty' => true,
 515                         'msgKey' => array( '' ),
 516                         'wrap' => "$1",
 517                         'flags' => 0,
 518                         'useRequestParams' => false,
 519                         'useMaster' => false,
 520                 );
 521                 # The + operator appends elements of remaining keys from the right
 522                 # handed array to the left handed, whereas duplicated keys are NOT overwritten.
 523                 $param += $defaultParameters;
 524                 # Convert $param array to individual variables
 525                 $lim = $param['lim'];
 526                 $conds = $param['conds'];
 527                 $showIfEmpty = $param['showIfEmpty'];
 528                 $msgKey = $param['msgKey'];
 529                 $wrap = $param['wrap'];
 530                 $flags = $param['flags'];
 531                 $useRequestParams = $param['useRequestParams'];
 532                 if ( !is_array( $msgKey ) ) {
 533                         $msgKey = array( $msgKey );
 534                 }
 535
 536                 if ( $out instanceof OutputPage ) {
 537                         $context = $out->getContext();
 538                 } else {
 539                         $context = RequestContext::getMain();
 540                 }
 541
 542                 # Insert list of top 50 (or top $lim) items
 543                 $loglist = new LogEventsList( $context, null, $flags );
 544                 $pager = new LogPager( $loglist, $types, $user, $page, '', $conds );
 545                 if ( !$useRequestParams ) {
 546                         # Reset vars that may have been taken from the request
 547                         $pager->mLimit = 50;
 548                         $pager->mDefaultLimit = 50;
 549                         $pager->mOffset = "";
 550                         $pager->mIsBackwards = false;
 551                 }
 552
 553                 if ( $param['useMaster'] ) {
 554                         $pager->mDb = wfGetDB( DB_MASTER );
 555                 }
 556                 if ( isset( $param['offset'] ) ) { # Tell pager to ignore WebRequest offset
 557                         $pager->setOffset( $param['offset'] );
 558                 }
 559
 560                 if ( $lim > 0 ) {
 561                         $pager->mLimit = $lim;
 562                 }
 563
 564                 $logBody = $pager->getBody();
 565                 $s = '';
 566
 567                 if ( $logBody ) {
 568                         if ( $msgKey[0] ) {
 569                                 $dir = $context->getLanguage()->getDir();
 570                                 $lang = $context->getLanguage()->getCode();
 571
 572                                 $s = Xml::openElement( 'div', array(
 573                                         'class' => "mw-warning-with-logexcerpt mw-content-$dir",
 574                                         'dir' => $dir,
 575                                         'lang' => $lang,
 576                                 ) );
 577
 578                                 if ( count( $msgKey ) == 1 ) {
 579                                         $s .= $context->msg( $msgKey[0] )->parseAsBlock();
 580                                 } else { // Process additional arguments
 581                                         $args = $msgKey;
 582                                         array_shift( $args );
 583                                         $s .= $context->msg( $msgKey[0], $args )->parseAsBlock();
 584                                 }
 585                         }
 586                         $s .= $loglist->beginLogEventsList() .
 587                                 $logBody .
 588                                 $loglist->endLogEventsList();
 589                 } elseif ( $showIfEmpty ) {
 590                         $s = Html::rawElement( 'div', array( 'class' => 'mw-warning-logempty' ),
 591                                 $context->msg( 'logempty' )->parse() );
 592                 }
 593
 594                 if ( $pager->getNumRows() > $pager->mLimit ) { # Show "Full log" link
 595                         $urlParam = array();
 596                         if ( $page instanceof Title ) {
 597                                 $urlParam['page'] = $page->getPrefixedDBkey();
 598                         } elseif ( $page != '' ) {
 599                                 $urlParam['page'] = $page;
 600                         }
 601
 602                         if ( $user != '' ) {
 603                                 $urlParam['user'] = $user;
 604                         }
 605
 606                         if ( !is_array( $types ) ) { # Make it an array, if it isn't
 607                                 $types = array( $types );
 608                         }
 609
 610                         # If there is exactly one log type, we can link to Special:Log?type=foo
 611                         if ( count( $types ) == 1 ) {
 612                                 $urlParam['type'] = $types[0];
 613                         }
 614
 615                         $s .= Linker::link(
 616                                 SpecialPage::getTitleFor( 'Log' ),
 617                                 $context->msg( 'log-fulllog' )->escaped(),
 618                                 array(),
 619                                 $urlParam
 620                         );
 621                 }
 622
 623                 if ( $logBody && $msgKey[0] ) {
 624                         $s .= '</div>';
 625                 }
 626
 627                 if ( $wrap != '' ) { // Wrap message in html
 628                         $s = str_replace( '$1', $s, $wrap );
 629                 }
 630
 631                 /* hook can return false, if we don't want the message to be emitted (Wikia BugId:7093) */
 632                 if ( wfRunHooks( 'LogEventsListShowLogExtract', array( &$s, $types, $page, $user, $param ) ) ) {
 633                         // $out can be either an OutputPage object or a String-by-reference
 634                         if ( $out instanceof OutputPage ) {
 635                                 $out->addHTML( $s );
 636                         } else {
 637                                 $out = $s;
 638                         }
 639                 }
 640
 641                 return $pager->getNumRows();
 642         }
 643
 644         /**
 645          * SQL clause to skip forbidden log types for this user
 646          *
 647          * @param DatabaseBase $db
 648          * @param string $audience Public/user
 649          * @param User $user User to check, or null to use $wgUser
 650          * @return string|bool String on success, false on failure.
 651          */
 652         public static function getExcludeClause( $db, $audience = 'public', User $user = null ) {
 653                 global $wgLogRestrictions;
 654
 655                 if ( $audience != 'public' && $user === null ) {
 656                         global $wgUser;
 657                         $user = $wgUser;
 658                 }
 659
 660                 // Reset the array, clears extra "where" clauses when $par is used
 661                 $hiddenLogs = array();
 662
 663                 // Don't show private logs to unprivileged users
 664                 foreach ( $wgLogRestrictions as $logType => $right ) {
 665                         if ( $audience == 'public' || !$user->isAllowed( $right ) ) {
 666                                 $hiddenLogs[] = $logType;
 667                         }
 668                 }
 669                 if ( count( $hiddenLogs ) == 1 ) {
 670                         return 'log_type != ' . $db->addQuotes( $hiddenLogs[0] );
 671                 } elseif ( $hiddenLogs ) {
 672                         return 'log_type NOT IN (' . $db->makeList( $hiddenLogs ) . ')';
 673                 }
 674
 675                 return false;
 676         }
 677 }