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