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