includes/LogEventsList.php

   1 <?php
   2 # Copyright (C) 2004 Brion Vibber <brion@pobox.com>, 2008 Aaron Schulz
   3 # http://www.mediawiki.org/
   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 class LogEventsList {
  21         const NO_ACTION_LINK = 1;
  22
  23         private $skin;
  24         private $out;
  25         public $flags;
  26
  27         public function __construct( $skin, $out, $flags = 0 ) {
  28                 $this->skin = $skin;
  29                 $this->out = $out;
  30                 $this->flags = $flags;
  31                 $this->preCacheMessages();
  32         }
  33
  34         /**
  35          * As we use the same small set of messages in various methods and that
  36          * they are called often, we call them once and save them in $this->message
  37          */
  38         private function preCacheMessages() {
  39                 // Precache various messages
  40                 if( !isset( $this->message ) ) {
  41                         $messages = array( 'revertmerge', 'protect_change', 'unblocklink', 'change-blocklink',
  42                                 'revertmove', 'undeletelink', 'undeleteviewlink', 'revdel-restore', 'rev-delundel', 'hist', 'diff',
  43                                 'pipe-separator' );
  44                         foreach( $messages as $msg ) {
  45                                 $this->message[$msg] = wfMsgExt( $msg, array( 'escapenoentities' ) );
  46                         }
  47                 }
  48         }
  49
  50         /**
  51          * Set page title and show header for this log type
  52          * @param $type String
  53          */
  54         public function showHeader( $type ) {
  55                 if( LogPage::isLogType( $type ) ) {
  56                         $this->out->setPageTitle( LogPage::logName( $type ) );
  57                         $this->out->addHTML( LogPage::logHeader( $type ) );
  58                 }
  59         }
  60
  61         /**
  62          * Show options for the log list
  63          * @param $types string or Array
  64          * @param $user String
  65          * @param $page String
  66          * @param $pattern String
  67          * @param $year Integer: year
  68          * @param $month Integer: month
  69          * @param $filter: array
  70          * @param $tagFilter: array?
  71          */
  72         public function showOptions( $types=array(), $user='', $page='', $pattern='', $year='',
  73                 $month = '', $filter = null, $tagFilter='' )
  74         {
  75                 global $wgScript, $wgMiserMode;
  76                 $action = htmlspecialchars( $wgScript );
  77                 $title = SpecialPage::getTitleFor( 'Log' );
  78                 $special = htmlspecialchars( $title->getPrefixedDBkey() );
  79                 // For B/C, we take strings, but make sure they are converted...
  80                 $types = ($types === '') ? array() : (array)$types;
  81
  82                 $tagSelector = ChangeTags::buildTagFilterSelector( $tagFilter );
  83
  84                 $this->out->addHTML( "<form action=\"$action\" method=\"get\"><fieldset>" .
  85                         Xml::element( 'legend', array(), wfMsg( 'log' ) ) .
  86                         Xml::hidden( 'title', $special ) . "\n" .
  87                         $this->getTypeMenu( $types ) . "\n" .
  88                         $this->getUserInput( $user ) . "\n" .
  89                         $this->getTitleInput( $page ) . "\n" .
  90                         ( !$wgMiserMode ? ($this->getTitlePattern( $pattern )."\n") : "" ) .
  91                         "<p>" . Xml::dateMenu( $year, $month ) . "\n" .
  92                         ( $tagSelector ? Xml::tags( 'p', null, implode( '&nbsp;', $tagSelector ) ) :'' ). "\n" .
  93                         ( $filter ? "</p><p>".$this->getFilterLinks( $filter )."\n" : "" ) . "\n" .
  94                         Xml::submitButton( wfMsg( 'allpagessubmit' ) ) . "</p>\n" .
  95                         "</fieldset></form>"
  96                 );
  97         }
  98
  99         /**
 100          * @param $filter Array
 101          * @return String: Formatted HTML
 102          */
 103         private function getFilterLinks( $filter ) {
 104                 global $wgTitle, $wgLang;
 105                 // show/hide links
 106                 $messages = array( wfMsgHtml( 'show' ), wfMsgHtml( 'hide' ) );
 107                 // Option value -> message mapping
 108                 $links = array();
 109                 $hiddens = ''; // keep track for "go" button
 110                 foreach( $filter as $type => $val ) {
 111                         $hideVal = 1 - intval($val);
 112                         $link = $this->skin->makeKnownLinkObj( $wgTitle, $messages[$hideVal],
 113                                 wfArrayToCGI( array( "hide_{$type}_log" => $hideVal ), $this->getDefaultQuery() )
 114                         );
 115                         $links[$type] = wfMsgHtml( "log-show-hide-{$type}", $link );
 116                         $hiddens .= Xml::hidden( "hide_{$type}_log", $val ) . "\n";
 117                 }
 118                 // Build links
 119                 return '<small>'.$wgLang->pipeList( $links ) . '</small>' . $hiddens;
 120         }
 121
 122         private function getDefaultQuery() {
 123                 if ( !isset( $this->mDefaultQuery ) ) {
 124                         $this->mDefaultQuery = $_GET;
 125                         unset( $this->mDefaultQuery['title'] );
 126                         unset( $this->mDefaultQuery['dir'] );
 127                         unset( $this->mDefaultQuery['offset'] );
 128                         unset( $this->mDefaultQuery['limit'] );
 129                         unset( $this->mDefaultQuery['order'] );
 130                         unset( $this->mDefaultQuery['month'] );
 131                         unset( $this->mDefaultQuery['year'] );
 132                 }
 133                 return $this->mDefaultQuery;
 134         }
 135
 136         /**
 137          * @param $queryTypes Array
 138          * @return String: Formatted HTML
 139          */
 140         private function getTypeMenu( $queryTypes ) {
 141                 global $wgLogRestrictions, $wgUser;
 142
 143                 $html = "<select name='type'>\n";
 144
 145                 $validTypes = LogPage::validTypes();
 146                 $typesByName = array(); // Temporary array
 147
 148                 // First pass to load the log names
 149                 foreach( $validTypes as $type ) {
 150                         $text = LogPage::logName( $type );
 151                         $typesByName[$text] = $type;
 152                 }
 153
 154                 // Second pass to sort by name
 155                 ksort($typesByName);
 156
 157                 // Note the query type
 158                 $queryType = count($queryTypes) == 1 ? $queryTypes[0] : '';
 159                 // Third pass generates sorted XHTML content
 160                 foreach( $typesByName as $text => $type ) {
 161                         $selected = ($type == $queryType);
 162                         // Restricted types
 163                         if ( isset($wgLogRestrictions[$type]) ) {
 164                                 if ( $wgUser->isAllowed( $wgLogRestrictions[$type] ) ) {
 165                                         $html .= Xml::option( $text, $type, $selected ) . "\n";
 166                                 }
 167                         } else {
 168                                 $html .= Xml::option( $text, $type, $selected ) . "\n";
 169                         }
 170                 }
 171
 172                 $html .= '</select>';
 173                 return $html;
 174         }
 175
 176         /**
 177          * @param $user String
 178          * @return String: Formatted HTML
 179          */
 180         private function getUserInput( $user ) {
 181                 return Xml::inputLabel( wfMsg( 'specialloguserlabel' ), 'user', 'mw-log-user', 15, $user );
 182         }
 183
 184         /**
 185          * @param $title String
 186          * @return String: Formatted HTML
 187          */
 188         private function getTitleInput( $title ) {
 189                 return Xml::inputLabel( wfMsg( 'speciallogtitlelabel' ), 'page', 'mw-log-page', 20, $title );
 190         }
 191
 192         /**
 193          * @return boolean Checkbox
 194          */
 195         private function getTitlePattern( $pattern ) {
 196                 return '<span style="white-space: nowrap">' .
 197                         Xml::checkLabel( wfMsg( 'log-title-wildcard' ), 'pattern', 'pattern', $pattern ) .
 198                         '</span>';
 199         }
 200
 201         public function beginLogEventsList() {
 202                 return "<ul>\n";
 203         }
 204
 205         public function endLogEventsList() {
 206                 return "</ul>\n";
 207         }
 208
 209         /**
 210          * @param $row Row: a single row from the result set
 211          * @return String: Formatted HTML list item
 212          */
 213         public function logLine( $row ) {
 214                 global $wgLang, $wgUser, $wgContLang;
 215
 216                 $title = Title::makeTitle( $row->log_namespace, $row->log_title );
 217                 $classes = array( "mw-logline-{$row->log_type}" );
 218                 $time = $wgLang->timeanddate( wfTimestamp(TS_MW, $row->log_timestamp), true );
 219                 // User links
 220                 if( self::isDeleted($row,LogPage::DELETED_USER) ) {
 221                         $userLink = '<span class="history-deleted">' . wfMsgHtml( 'rev-deleted-user' ) . '</span>';
 222                 } else {
 223                         $userLink = $this->skin->userLink( $row->log_user, $row->user_name ) .
 224                                 $this->skin->userToolLinks( $row->log_user, $row->user_name, true, 0, $row->user_editcount );
 225                 }
 226                 // Comment
 227                 if( self::isDeleted($row,LogPage::DELETED_COMMENT) ) {
 228                         $comment = '<span class="history-deleted">' . wfMsgHtml('rev-deleted-comment') . '</span>';
 229                 } else {
 230                         $comment = $wgContLang->getDirMark() . $this->skin->commentBlock( $row->log_comment );
 231                 }
 232                 // Extract extra parameters
 233                 $paramArray = LogPage::extractParams( $row->log_params );
 234                 $revert = $del = '';
 235                 // Some user can hide log items and have review links
 236                 if( !($this->flags & self::NO_ACTION_LINK) && $wgUser->isAllowed( 'deleterevision' ) ) {
 237                         $del = $this->getShowHideLinks( $row ) . ' ';
 238                 }
 239                 // Add review links and such...
 240                 if( ($this->flags & self::NO_ACTION_LINK) || ($row->log_deleted & LogPage::DELETED_ACTION) ) {
 241                         // Action text is suppressed...
 242                 } else if( self::typeAction($row,'move','move','move') && !empty($paramArray[0]) ) {
 243                         $destTitle = Title::newFromText( $paramArray[0] );
 244                         if( $destTitle ) {
 245                                 $revert = '(' . $this->skin->makeKnownLinkObj( SpecialPage::getTitleFor( 'Movepage' ),
 246                                         $this->message['revertmove'],
 247                                         'wpOldTitle=' . urlencode( $destTitle->getPrefixedDBkey() ) .
 248                                         '&wpNewTitle=' . urlencode( $title->getPrefixedDBkey() ) .
 249                                         '&wpReason=' . urlencode( wfMsgForContent( 'revertmove' ) ) .
 250                                         '&wpMovetalk=0' ) . ')';
 251                         }
 252                 // Show undelete link
 253                 } else if( self::typeAction($row,array('delete','suppress'),'delete','deletedhistory') ) {
 254                         if( !$wgUser->isAllowed( 'undelete' ) )
 255                                 $viewdeleted = $this->message['undeleteviewlink'];
 256                         else
 257                                 $viewdeleted = $this->message['undeletelink'];
 258                         $revert = '(' . $this->skin->makeKnownLinkObj( SpecialPage::getTitleFor( 'Undelete' ),
 259                                 $viewdeleted, 'target='. urlencode( $title->getPrefixedDBkey() ) ) . ')';
 260                 // Show unblock/change block link
 261                 } else if( self::typeAction($row,array('block','suppress'),array('block','reblock'),'block') ) {
 262                         $revert = '(' .
 263                                 $this->skin->link( SpecialPage::getTitleFor( 'Ipblocklist' ),
 264                                         $this->message['unblocklink'],
 265                                         array(),
 266                                         array( 'action' => 'unblock', 'ip' => $row->log_title ),
 267                                         'known' )
 268                                 . $this->message['pipe-separator'] .
 269                                 $this->skin->link( SpecialPage::getTitleFor( 'Blockip', $row->log_title ),
 270                                         $this->message['change-blocklink'],
 271                                         array(), array(), 'known' ) .
 272                                 ')';
 273                 // Show change protection link
 274                 } else if( self::typeAction( $row, 'protect', array( 'modify', 'protect', 'unprotect' ) ) ) {
 275                         $revert .= ' (' .
 276                                 $this->skin->link( $title,
 277                                         $this->message['hist'],
 278                                         array(),
 279                                         array( 'action' => 'history', 'offset' => $row->log_timestamp ) );
 280                         if( $wgUser->isAllowed( 'protect' ) ) {
 281                                 $revert .= $this->message['pipe-separator'] .
 282                                         $this->skin->link( $title,
 283                                                 $this->message['protect_change'],
 284                                                 array(),
 285                                                 array( 'action' => 'protect' ),
 286                                                 'known' );
 287                         }
 288                         $revert .= ')';
 289                 // Show unmerge link
 290                 } else if( self::typeAction($row,'merge','merge','mergehistory') ) {
 291                         $merge = SpecialPage::getTitleFor( 'Mergehistory' );
 292                         $revert = '(' .  $this->skin->makeKnownLinkObj( $merge, $this->message['revertmerge'],
 293                                 wfArrayToCGI( array('target' => $paramArray[0], 'dest' => $title->getPrefixedDBkey(),
 294                                         'mergepoint' => $paramArray[1] ) ) ) . ')';
 295                 // If an edit was hidden from a page give a review link to the history
 296                 } else if( self::typeAction($row,array('delete','suppress'),'revision','deleterevision') ) {
 297                         if( count($paramArray) >= 2 ) {
 298                                 $revdel = SpecialPage::getTitleFor( 'Revisiondelete' );
 299                                 // Different revision types use different URL params...
 300                                 $key = $paramArray[0];
 301                                 // $paramArray[1] is a CVS of the IDs
 302                                 $Ids = explode( ',', $paramArray[1] );
 303                                 $query = urlencode($paramArray[1]);
 304                                 $revert = array();
 305                                 // Diff link for single rev deletions
 306                                 if( $key === 'oldid' && count($Ids) == 1 ) {
 307                                         $token = urlencode( $wgUser->editToken( intval($Ids[0]) ) );
 308                                         $revert[] = $this->skin->makeKnownLinkObj( $title, $this->message['diff'],
 309                                                 'diff='.intval($Ids[0])."&unhide=1&token=$token" );
 310                                 }
 311                                 // View/modify link...
 312                                 $revert[] = $this->skin->makeKnownLinkObj( $revdel, $this->message['revdel-restore'],
 313                                         'target='.$title->getPrefixedUrl()."&$key=$query" );
 314                                 // Pipe links
 315                                 $revert = '(' . implode(' | ',$revert) . ')';
 316                         }
 317                 // Hidden log items, give review link
 318                 } else if( self::typeAction($row,array('delete','suppress'),'event','deleterevision') ) {
 319                         if( count($paramArray) >= 1 ) {
 320                                 $revdel = SpecialPage::getTitleFor( 'Revisiondelete' );
 321                                 // $paramArray[1] is a CVS of the IDs
 322                                 $Ids = explode( ',', $paramArray[0] );
 323                                 $query = urlencode($paramArray[0]);
 324                                 // Link to each hidden object ID, $paramArray[1] is the url param
 325                                 $revert = '(' . $this->skin->makeKnownLinkObj( $revdel, $this->message['revdel-restore'],
 326                                         'target='.$title->getPrefixedUrl()."&logid=$query" ) . ')';
 327                         }
 328                 // Self-created users
 329                 } else if( self::typeAction($row,'newusers','create2') ) {
 330                         if( isset( $paramArray[0] ) ) {
 331                                 $revert = $this->skin->userToolLinks( $paramArray[0], $title->getDBkey(), true );
 332                         } else {
 333                                 # Fall back to a blue contributions link
 334                                 $revert = $this->skin->userToolLinks( 1, $title->getDBkey() );
 335                         }
 336                         if( $time < '20080129000000' ) {
 337                                 # Suppress $comment from old entries (before 2008-01-29),
 338                                 # not needed and can contain incorrect links
 339                                 $comment = '';
 340                         }
 341                 // Do nothing. The implementation is handled by the hook modifiying the passed-by-ref parameters.
 342                 } else {
 343                         wfRunHooks( 'LogLine', array( $row->log_type, $row->log_action, $title, $paramArray,
 344                                 &$comment, &$revert, $row->log_timestamp ) );
 345                 }
 346                 // Event description
 347                 if( self::isDeleted($row,LogPage::DELETED_ACTION) ) {
 348                         $action = '<span class="history-deleted">' . wfMsgHtml('rev-deleted-event') . '</span>';
 349                 } else {
 350                         $action = LogPage::actionText( $row->log_type, $row->log_action, $title,
 351                                 $this->skin, $paramArray, true );
 352                 }
 353
 354                 // Any tags...
 355                 list($tagDisplay, $newClasses) = ChangeTags::formatSummaryRow( $row->ts_tags, 'logevent' );
 356                 $classes = array_merge( $classes, $newClasses );
 357
 358                 if( $revert != '' ) {
 359                         $revert = '<span class="mw-logevent-actionlink">' . $revert . '</span>';
 360                 }
 361
 362                 $time = htmlspecialchars( $time );
 363
 364                 return Xml::tags( 'li', array( "class" => implode( ' ', $classes ) ),
 365                         $del . $time . ' ' . $userLink . ' ' . $action . ' ' . $comment . ' ' . $revert . " $tagDisplay" ) . "\n";
 366         }
 367
 368         /**
 369          * @param $row Row
 370          * @return string
 371          */
 372         private function getShowHideLinks( $row ) {
 373                 $revdel = SpecialPage::getTitleFor( 'Revisiondelete' );
 374                 // If event was hidden from sysops
 375                 if( !self::userCan( $row, LogPage::DELETED_RESTRICTED ) ) {
 376                         $del = Xml::tags( 'span', array( 'class'=>'mw-revdelundel-link' ),
 377                                 '('.$this->message['rev-delundel'].')' );
 378                 } else if( $row->log_type == 'suppress' ) {
 379                         $del = ''; // No one should be hiding from the oversight log
 380                 } else {
 381                         $target = SpecialPage::getTitleFor( 'Log', $row->log_type );
 382                         $page = Title::makeTitle( $row->log_namespace, $row->log_title );
 383                         $query = array( 'target' => $target->getPrefixedDBkey(),
 384                                 'logid' => $row->log_id, 'page' => $page->getPrefixedDBkey() );
 385                         $del = $this->skin->revDeleteLink( $query,
 386                                 self::isDeleted( $row, LogPage::DELETED_RESTRICTED ) );
 387                 }
 388                 return $del;
 389         }
 390
 391         /**
 392          * @param $row Row
 393          * @param $type Mixed: string/array
 394          * @param $action Mixed: string/array
 395          * @param $right string
 396          * @return bool
 397          */
 398         public static function typeAction( $row, $type, $action, $right='' ) {
 399                 $match = is_array($type) ?
 400                         in_array($row->log_type,$type) : $row->log_type == $type;
 401                 if( $match ) {
 402                         $match = is_array($action) ?
 403                                 in_array($row->log_action,$action) : $row->log_action == $action;
 404                         if( $match && $right ) {
 405                                 global $wgUser;
 406                                 $match = $wgUser->isAllowed( $right );
 407                         }
 408                 }
 409                 return $match;
 410         }
 411
 412         /**
 413          * Determine if the current user is allowed to view a particular
 414          * field of this log row, if it's marked as deleted.
 415          * @param $row Row
 416          * @param $field Integer
 417          * @return Boolean
 418          */
 419         public static function userCan( $row, $field ) {
 420                 if( ( $row->log_deleted & $field ) == $field ) {
 421                         global $wgUser;
 422                         $permission = ( $row->log_deleted & LogPage::DELETED_RESTRICTED ) == LogPage::DELETED_RESTRICTED
 423                                 ? 'suppressrevision'
 424                                 : 'deleterevision';
 425                         wfDebug( "Checking for $permission due to $field match on $row->log_deleted\n" );
 426                         return $wgUser->isAllowed( $permission );
 427                 } else {
 428                         return true;
 429                 }
 430         }
 431
 432         /**
 433          * @param $row Row
 434          * @param $field Integer: one of DELETED_* bitfield constants
 435          * @return Boolean
 436          */
 437         public static function isDeleted( $row, $field ) {
 438                 return ($row->log_deleted & $field) == $field;
 439         }
 440
 441         /**
 442          * Quick function to show a short log extract
 443          * @param $out OutputPage
 444          * @param $types String or Array
 445          * @param $page String
 446          * @param $user String
 447          * @param $lim Integer
 448          * @param $conds Array
 449          */
 450         public static function showLogExtract( $out, $types=array(), $page='', $user='', $lim=0, $conds=array() ) {
 451                 global $wgUser;
 452                 # Insert list of top 50 or so items
 453                 $loglist = new LogEventsList( $wgUser->getSkin(), $out, 0 );
 454                 $pager = new LogPager( $loglist, $types, $user, $page, '', $conds );
 455                 if( $lim > 0 ) $pager->mLimit = $lim;
 456                 $logBody = $pager->getBody();
 457                 if( $logBody ) {
 458                         $out->addHTML(
 459                                 $loglist->beginLogEventsList() .
 460                                 $logBody .
 461                                 $loglist->endLogEventsList()
 462                         );
 463                 } else {
 464                         $out->addWikiMsg( 'logempty' );
 465                 }
 466                 return $pager->getNumRows();
 467         }
 468
 469         /**
 470          * SQL clause to skip forbidden log types for this user
 471          * @param $db Database
 472          * @param $audience string, public/user
 473          * @return mixed (string or false)
 474          */
 475         public static function getExcludeClause( $db, $audience = 'public' ) {
 476                 global $wgLogRestrictions, $wgUser;
 477                 // Reset the array, clears extra "where" clauses when $par is used
 478                 $hiddenLogs = array();
 479                 // Don't show private logs to unprivileged users
 480                 foreach( $wgLogRestrictions as $logType => $right ) {
 481                         if( $audience == 'public' || !$wgUser->isAllowed($right) ) {
 482                                 $safeType = $db->strencode( $logType );
 483                                 $hiddenLogs[] = $safeType;
 484                         }
 485                 }
 486                 if( count($hiddenLogs) == 1 ) {
 487                         return 'log_type != ' . $db->addQuotes( $hiddenLogs[0] );
 488                 } elseif( $hiddenLogs ) {
 489                         return 'log_type NOT IN (' . $db->makeList($hiddenLogs) . ')';
 490                 }
 491                 return false;
 492         }
 493 }
 494
 495 /**
 496  * @ingroup Pager
 497  */
 498 class LogPager extends ReverseChronologicalPager {
 499         private $types = array(), $user = '', $title = '', $pattern = '';
 500         private $typeCGI = '';
 501         public $mLogEventsList;
 502
 503         /**
 504          * constructor
 505          * @param $list LogEventsList
 506          * @param $types String or Array
 507          * @param $user String
 508          * @param $title String
 509          * @param $pattern String
 510          * @param $conds Array
 511          * @param $year Integer
 512          * @param $month Integer
 513          */
 514         public function __construct( $list, $types = array(), $user = '', $title = '', $pattern = '',
 515                 $conds = array(), $year = false, $month = false, $tagFilter = '' )
 516         {
 517                 parent::__construct();
 518                 $this->mConds = $conds;
 519
 520                 $this->mLogEventsList = $list;
 521
 522                 $this->limitType( $types ); // also excludes hidden types
 523                 $this->limitUser( $user );
 524                 $this->limitTitle( $title, $pattern );
 525                 $this->getDateCond( $year, $month );
 526                 $this->mTagFilter = $tagFilter;
 527         }
 528
 529         public function getDefaultQuery() {
 530                 $query = parent::getDefaultQuery();
 531                 $query['type'] = $this->typeCGI; // arrays won't work here
 532                 $query['user'] = $this->user;
 533                 $query['month'] = $this->mMonth;
 534                 $query['year'] = $this->mYear;
 535                 return $query;
 536         }
 537
 538         // Call ONLY after calling $this->limitType() already!
 539         public function getFilterParams() {
 540                 global $wgFilterLogTypes, $wgUser, $wgRequest;
 541                 $filters = array();
 542                 if( count($this->types) ) {
 543                         return $filters;
 544                 }
 545                 foreach( $wgFilterLogTypes as $type => $default ) {
 546                         // Avoid silly filtering
 547                         if( $type !== 'patrol' || $wgUser->useNPPatrol() ) {
 548                                 $hide = $wgRequest->getInt( "hide_{$type}_log", $default );
 549                                 $filters[$type] = $hide;
 550                                 if( $hide )
 551                                         $this->mConds[] = 'log_type != ' . $this->mDb->addQuotes( $type );
 552                         }
 553                 }
 554                 return $filters;
 555         }
 556
 557         /**
 558          * Set the log reader to return only entries of the given type.
 559          * Type restrictions enforced here
 560          * @param $types String or array: Log types ('upload', 'delete', etc);
 561          *   empty string means no restriction
 562          */
 563         private function limitType( $types ) {
 564                 global $wgLogRestrictions, $wgUser;
 565                 // If $types is not an array, make it an array
 566                 $types = ($types === '') ? array() : (array)$types;
 567                 // Don't even show header for private logs; don't recognize it...
 568                 foreach ( $types as $type ) {
 569                         if( isset( $wgLogRestrictions[$type] ) && !$wgUser->isAllowed($wgLogRestrictions[$type]) ) {
 570                                 $types = array_diff( $types, array( $type ) );
 571                         }
 572                 }
 573                 // Don't show private logs to unprivileged users.
 574                 // Also, only show them upon specific request to avoid suprises.
 575                 $audience = $types ? 'user' : 'public';
 576                 $hideLogs = LogEventsList::getExcludeClause( $this->mDb, $audience );
 577                 if( $hideLogs !== false ) {
 578                         $this->mConds[] = $hideLogs;
 579                 }
 580                 if( count($types) ) {
 581                         $this->types = $types;
 582                         $this->mConds['log_type'] = $types;
 583                         // Set typeCGI; used in url param for paging
 584                         if( count($types) == 1 ) $this->typeCGI = $types[0];
 585                 }
 586         }
 587
 588         /**
 589          * Set the log reader to return only entries by the given user.
 590          * @param $name String: (In)valid user name
 591          */
 592         private function limitUser( $name ) {
 593                 if( $name == '' ) {
 594                         return false;
 595                 }
 596                 $usertitle = Title::makeTitleSafe( NS_USER, $name );
 597                 if( is_null($usertitle) ) {
 598                         return false;
 599                 }
 600                 /* Fetch userid at first, if known, provides awesome query plan afterwards */
 601                 $userid = User::idFromName( $name );
 602                 if( !$userid ) {
 603                         /* It should be nicer to abort query at all,
 604                            but for now it won't pass anywhere behind the optimizer */
 605                         $this->mConds[] = "NULL";
 606                 } else {
 607                         global $wgUser;
 608                         $this->mConds['log_user'] = $userid;
 609                         // Paranoia: avoid brute force searches (bug 17342)
 610                         if( !$wgUser->isAllowed( 'suppressrevision' ) ) {
 611                                 $this->mConds[] = 'log_deleted & ' . LogPage::DELETED_USER . ' = 0';
 612                         }
 613                         $this->user = $usertitle->getText();
 614                 }
 615         }
 616
 617         /**
 618          * Set the log reader to return only entries affecting the given page.
 619          * (For the block and rights logs, this is a user page.)
 620          * @param $page String: Title name as text
 621          * @param $pattern String
 622          */
 623         private function limitTitle( $page, $pattern ) {
 624                 global $wgMiserMode, $wgUser;
 625
 626                 $title = Title::newFromText( $page );
 627                 if( strlen($page) == 0 || !$title instanceof Title )
 628                         return false;
 629
 630                 $this->title = $title->getPrefixedText();
 631                 $ns = $title->getNamespace();
 632                 # Using the (log_namespace, log_title, log_timestamp) index with a
 633                 # range scan (LIKE) on the first two parts, instead of simple equality,
 634                 # makes it unusable for sorting.  Sorted retrieval using another index
 635                 # would be possible, but then we might have to scan arbitrarily many
 636                 # nodes of that index. Therefore, we need to avoid this if $wgMiserMode
 637                 # is on.
 638                 #
 639                 # This is not a problem with simple title matches, because then we can
 640                 # use the page_time index.  That should have no more than a few hundred
 641                 # log entries for even the busiest pages, so it can be safely scanned
 642                 # in full to satisfy an impossible condition on user or similar.
 643                 if( $pattern && !$wgMiserMode ) {
 644                         # use escapeLike to avoid expensive search patterns like 't%st%'
 645                         $safetitle = $this->mDb->escapeLike( $title->getDBkey() );
 646                         $this->mConds['log_namespace'] = $ns;
 647                         $this->mConds[] = "log_title LIKE '$safetitle%'";
 648                         $this->pattern = $pattern;
 649                 } else {
 650                         $this->mConds['log_namespace'] = $ns;
 651                         $this->mConds['log_title'] = $title->getDBkey();
 652                 }
 653                 // Paranoia: avoid brute force searches (bug 17342)
 654                 if( !$wgUser->isAllowed( 'suppressrevision' ) ) {
 655                         $this->mConds[] = 'log_deleted & ' . LogPage::DELETED_ACTION . ' = 0';
 656                 }
 657         }
 658
 659         public function getQueryInfo() {
 660                 $tables = array( 'logging', 'user' );
 661                 $this->mConds[] = 'user_id = log_user';
 662                 $groupBy = false;
 663                 # Add log_search table if there are conditions on it
 664                 if( array_key_exists('ls_field',$this->mConds) ) {
 665                         $tables[] = 'log_search';
 666                         $index = array( 'log_search' => 'PRIMARY', 'logging' => 'PRIMARY' );
 667                         $groupBy = 'ls_log_id';
 668                 # Don't use the wrong logging index
 669                 } else if( $this->title || $this->pattern || $this->user ) {
 670                         $index = array( 'logging' => array('page_time','user_time') );
 671                 } else if( $this->types ) {
 672                         $index = array( 'logging' => 'type_time' );
 673                 } else {
 674                         $index = array( 'logging' => 'times' );
 675                 }
 676                 $options = array( 'USE INDEX' => $index );
 677                 # Don't show duplicate rows when using log_search
 678                 if( $groupBy ) $options['GROUP BY'] = $groupBy;
 679                 $info = array(
 680                         'tables'     => $tables,
 681                         'fields'     => array( 'log_type', 'log_action', 'log_user', 'log_namespace',
 682                                 'log_title', 'log_params', 'log_comment', 'log_id', 'log_deleted',
 683                                 'log_timestamp', 'user_name', 'user_editcount' ),
 684                         'conds'      => $this->mConds,
 685                         'options'    => $options,
 686                         'join_conds' => array(
 687                                 'user' => array( 'INNER JOIN', 'user_id=log_user' ),
 688                                 'log_search' => array( 'INNER JOIN', 'ls_log_id=log_id' )
 689                         )
 690                 );
 691                 # Add ChangeTags filter query
 692                 ChangeTags::modifyDisplayQuery( $info['tables'], $info['fields'], $info['conds'],
 693                         $info['join_conds'], $info['options'], $this->mTagFilter );
 694
 695                 return $info;
 696         }
 697
 698         function getIndexField() {
 699                 return 'log_timestamp';
 700         }
 701
 702         public function getStartBody() {
 703                 wfProfileIn( __METHOD__ );
 704                 # Do a link batch query
 705                 if( $this->getNumRows() > 0 ) {
 706                         $lb = new LinkBatch;
 707                         while( $row = $this->mResult->fetchObject() ) {
 708                                 $lb->add( $row->log_namespace, $row->log_title );
 709                                 $lb->addObj( Title::makeTitleSafe( NS_USER, $row->user_name ) );
 710                                 $lb->addObj( Title::makeTitleSafe( NS_USER_TALK, $row->user_name ) );
 711                         }
 712                         $lb->execute();
 713                         $this->mResult->seek( 0 );
 714                 }
 715                 wfProfileOut( __METHOD__ );
 716                 return '';
 717         }
 718
 719         public function formatRow( $row ) {
 720                 return $this->mLogEventsList->logLine( $row );
 721         }
 722
 723         public function getType() {
 724                 return $this->types;
 725         }
 726
 727         public function getUser() {
 728                 return $this->user;
 729         }
 730
 731         public function getPage() {
 732                 return $this->title;
 733         }
 734
 735         public function getPattern() {
 736                 return $this->pattern;
 737         }
 738
 739         public function getYear() {
 740                 return $this->mYear;
 741         }
 742
 743         public function getMonth() {
 744                 return $this->mMonth;
 745         }
 746
 747         public function getTagFilter() {
 748                 return $this->mTagFilter;
 749         }
 750
 751         public function doQuery() {
 752                 // Workaround MySQL optimizer bug
 753                 $this->mDb->setBigSelects();
 754                 parent::doQuery();
 755                 $this->mDb->setBigSelects( 'default' );
 756         }
 757 }
 758
 759 /**
 760  * @deprecated
 761  * @ingroup SpecialPage
 762  */
 763 class LogReader {
 764         var $pager;
 765         /**
 766          * @param $request WebRequest: for internal use use a FauxRequest object to pass arbitrary parameters.
 767          */
 768         function __construct( $request ) {
 769                 global $wgUser, $wgOut;
 770                 wfDeprecated(__METHOD__);
 771                 # Get parameters
 772                 $type = $request->getVal( 'type' );
 773                 $user = $request->getText( 'user' );
 774                 $title = $request->getText( 'page' );
 775                 $pattern = $request->getBool( 'pattern' );
 776                 $year = $request->getIntOrNull( 'year' );
 777                 $month = $request->getIntOrNull( 'month' );
 778                 $tagFilter = $request->getVal( 'tagfilter' );
 779                 # Don't let the user get stuck with a certain date
 780                 $skip = $request->getText( 'offset' ) || $request->getText( 'dir' ) == 'prev';
 781                 if( $skip ) {
 782                         $year = '';
 783                         $month = '';
 784                 }
 785                 # Use new list class to output results
 786                 $loglist = new LogEventsList( $wgUser->getSkin(), $wgOut, 0 );
 787                 $this->pager = new LogPager( $loglist, $type, $user, $title, $pattern, $year, $month, $tagFilter );
 788         }
 789
 790         /**
 791         * Is there at least one row?
 792         * @return bool
 793         */
 794         public function hasRows() {
 795                 return isset($this->pager) ? ($this->pager->getNumRows() > 0) : false;
 796         }
 797 }
 798
 799 /**
 800  * @deprecated
 801  * @ingroup SpecialPage
 802  */
 803 class LogViewer {
 804         const NO_ACTION_LINK = 1;
 805
 806         /**
 807          * LogReader object
 808          */
 809         var $reader;
 810
 811         /**
 812          * @param &$reader LogReader: where to get our data from
 813          * @param $flags Integer: Bitwise combination of flags:
 814          *     LogEventsList::NO_ACTION_LINK   Don't show restore/unblock/block links
 815          */
 816         function __construct( &$reader, $flags = 0 ) {
 817                 wfDeprecated(__METHOD__);
 818                 $this->reader =& $reader;
 819                 $this->reader->pager->mLogEventsList->flags = $flags;
 820                 # Aliases for shorter code...
 821                 $this->pager =& $this->reader->pager;
 822                 $this->list =& $this->reader->pager->mLogEventsList;
 823         }
 824
 825         /**
 826          * Take over the whole output page in $wgOut with the log display.
 827          */
 828         public function show() {
 829                 # Set title and add header
 830                 $this->list->showHeader( $pager->getType() );
 831                 # Show form options
 832                 $this->list->showOptions( $this->pager->getType(), $this->pager->getUser(), $this->pager->getPage(),
 833                         $this->pager->getPattern(), $this->pager->getYear(), $this->pager->getMonth() );
 834                 # Insert list
 835                 $logBody = $this->pager->getBody();
 836                 if( $logBody ) {
 837                         $wgOut->addHTML(
 838                                 $this->pager->getNavigationBar() .
 839                                 $this->list->beginLogEventsList() .
 840                                 $logBody .
 841                                 $this->list->endLogEventsList() .
 842                                 $this->pager->getNavigationBar()
 843                         );
 844                 } else {
 845                         $wgOut->addWikiMsg( 'logempty' );
 846                 }
 847         }
 848
 849         /**
 850          * Output just the list of entries given by the linked LogReader,
 851          * with extraneous UI elements. Use for displaying log fragments in
 852          * another page (eg at Special:Undelete)
 853          * @param $out OutputPage: where to send output
 854          */
 855         public function showList( &$out ) {
 856                 $logBody = $this->pager->getBody();
 857                 if( $logBody ) {
 858                         $out->addHTML(
 859                                 $this->list->beginLogEventsList() .
 860                                 $logBody .
 861                                 $this->list->endLogEventsList()
 862                         );
 863                 } else {
 864                         $out->addWikiMsg( 'logempty' );
 865                 }
 866         }
 867 }