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 Array
  53          */
  54         public function showHeader( $type ) {
  55                 // If only one log type is used, then show a special message...
  56                 $headerType = (count($type) == 1) ? $type[0] : '';
  57                 if( LogPage::isLogType( $headerType ) ) {
  58                         $this->out->setPageTitle( LogPage::logName( $headerType ) );
  59                         $this->out->addHTML( LogPage::logHeader( $headerType ) );
  60                 } else {
  61                         $this->out->addHTML( wfMsgExt('alllogstext',array('parseinline')) );
  62                 }
  63         }
  64
  65         /**
  66          * Show options for the log list
  67          * @param $types string or Array
  68          * @param $user String
  69          * @param $page String
  70          * @param $pattern String
  71          * @param $year Integer: year
  72          * @param $month Integer: month
  73          * @param $filter: array
  74          * @param $tagFilter: array?
  75          */
  76         public function showOptions( $types=array(), $user='', $page='', $pattern='', $year='',
  77                 $month = '', $filter = null, $tagFilter='' )
  78         {
  79                 global $wgScript, $wgMiserMode;
  80
  81                 $action = $wgScript;
  82                 $title = SpecialPage::getTitleFor( 'Log' );
  83                 $special = $title->getPrefixedDBkey();
  84
  85                 // For B/C, we take strings, but make sure they are converted...
  86                 $types = ($types === '') ? array() : (array)$types;
  87
  88                 $tagSelector = ChangeTags::buildTagFilterSelector( $tagFilter );
  89
  90                 $html = '';
  91                 $html .= Xml::hidden( 'title', $special );
  92
  93                 // Basic selectors
  94                 $html .= $this->getTypeMenu( $types ) . "\n";
  95                 $html .= $this->getUserInput( $user ) . "\n";
  96                 $html .= $this->getTitleInput( $page ) . "\n";
  97
  98                 // Title pattern, if allowed
  99                 if (!$wgMiserMode) {
 100                         $html .= $this->getTitlePattern( $pattern ) . "\n";
 101                 }
 102
 103                 // date menu
 104                 $html .= Xml::tags( 'p', null, Xml::dateMenu( $year, $month ) );
 105
 106                 // Tag filter
 107                 if ($tagSelector) {
 108                         $html .= Xml::tags( 'p', null, implode( '&nbsp;', $tagSelector ) );
 109                 }
 110
 111                 // Filter links
 112                 if ($filter) {
 113                         $html .= Xml::tags( 'p', null, $this->getFilterLinks( $filter ) );
 114                 }
 115
 116                 // Submit button
 117                 $html .= Xml::submitButton( wfMsg( 'allpagessubmit' ) );
 118
 119                 // Fieldset
 120                 $html = Xml::fieldset( wfMsg( 'log' ), $html );
 121
 122                 // Form wrapping
 123                 $html = Xml::tags( 'form', array( 'action' => $action, 'method' => 'get' ), $html );
 124
 125                 $this->out->addHTML( $html );
 126         }
 127
 128         /**
 129          * @param $filter Array
 130          * @return String: Formatted HTML
 131          */
 132         private function getFilterLinks( $filter ) {
 133                 global $wgTitle, $wgLang;
 134                 // show/hide links
 135                 $messages = array( wfMsgHtml( 'show' ), wfMsgHtml( 'hide' ) );
 136                 // Option value -> message mapping
 137                 $links = array();
 138                 $hiddens = ''; // keep track for "go" button
 139                 foreach( $filter as $type => $val ) {
 140                         // Should the below assignment be outside the foreach?
 141                         // Then it would have to be copied. Not certain what is more expensive.
 142                         $query = $this->getDefaultQuery();
 143                         $queryKey = "hide_{$type}_log";
 144
 145                         $hideVal = 1 - intval($val);
 146                         $query[$queryKey] = $hideVal;
 147
 148                         $link = $this->skin->link(
 149                                 $wgTitle,
 150                                 $messages[$hideVal],
 151                                 array(),
 152                                 $query,
 153                                 array( 'known', 'noclasses' )
 154                         );
 155
 156                         $links[$type] = wfMsgHtml( "log-show-hide-{$type}", $link );
 157                         $hiddens .= Xml::hidden( "hide_{$type}_log", $val ) . "\n";
 158                 }
 159                 // Build links
 160                 return '<small>'.$wgLang->pipeList( $links ) . '</small>' . $hiddens;
 161         }
 162
 163         private function getDefaultQuery() {
 164                 if ( !isset( $this->mDefaultQuery ) ) {
 165                         $this->mDefaultQuery = $_GET;
 166                         unset( $this->mDefaultQuery['title'] );
 167                         unset( $this->mDefaultQuery['dir'] );
 168                         unset( $this->mDefaultQuery['offset'] );
 169                         unset( $this->mDefaultQuery['limit'] );
 170                         unset( $this->mDefaultQuery['order'] );
 171                         unset( $this->mDefaultQuery['month'] );
 172                         unset( $this->mDefaultQuery['year'] );
 173                 }
 174                 return $this->mDefaultQuery;
 175         }
 176
 177         /**
 178          * @param $queryTypes Array
 179          * @return String: Formatted HTML
 180          */
 181         private function getTypeMenu( $queryTypes ) {
 182                 global $wgLogRestrictions, $wgUser;
 183
 184                 $html = "<select name='type'>\n";
 185
 186                 $validTypes = LogPage::validTypes();
 187                 $typesByName = array(); // Temporary array
 188
 189                 // First pass to load the log names
 190                 foreach( $validTypes as $type ) {
 191                         $text = LogPage::logName( $type );
 192                         $typesByName[$text] = $type;
 193                 }
 194
 195                 // Second pass to sort by name
 196                 ksort($typesByName);
 197
 198                 // Note the query type
 199                 $queryType = count($queryTypes) == 1 ? $queryTypes[0] : '';
 200                 // Third pass generates sorted XHTML content
 201                 foreach( $typesByName as $text => $type ) {
 202                         $selected = ($type == $queryType);
 203                         // Restricted types
 204                         if ( isset($wgLogRestrictions[$type]) ) {
 205                                 if ( $wgUser->isAllowed( $wgLogRestrictions[$type] ) ) {
 206                                         $html .= Xml::option( $text, $type, $selected ) . "\n";
 207                                 }
 208                         } else {
 209                                 $html .= Xml::option( $text, $type, $selected ) . "\n";
 210                         }
 211                 }
 212
 213                 $html .= '</select>';
 214                 return $html;
 215         }
 216
 217         /**
 218          * @param $user String
 219          * @return String: Formatted HTML
 220          */
 221         private function getUserInput( $user ) {
 222                 return Xml::inputLabel( wfMsg( 'specialloguserlabel' ), 'user', 'mw-log-user', 15, $user );
 223         }
 224
 225         /**
 226          * @param $title String
 227          * @return String: Formatted HTML
 228          */
 229         private function getTitleInput( $title ) {
 230                 return Xml::inputLabel( wfMsg( 'speciallogtitlelabel' ), 'page', 'mw-log-page', 20, $title );
 231         }
 232
 233         /**
 234          * @return boolean Checkbox
 235          */
 236         private function getTitlePattern( $pattern ) {
 237                 return '<span style="white-space: nowrap">' .
 238                         Xml::checkLabel( wfMsg( 'log-title-wildcard' ), 'pattern', 'pattern', $pattern ) .
 239                         '</span>';
 240         }
 241
 242         public function beginLogEventsList() {
 243                 return "<ul>\n";
 244         }
 245
 246         public function endLogEventsList() {
 247                 return "</ul>\n";
 248         }
 249
 250         /**
 251          * @param $row Row: a single row from the result set
 252          * @return String: Formatted HTML list item
 253          */
 254         public function logLine( $row ) {
 255                 global $wgLang, $wgUser, $wgContLang;
 256
 257                 $title = Title::makeTitle( $row->log_namespace, $row->log_title );
 258                 $classes = array( "mw-logline-{$row->log_type}" );
 259                 $time = $wgLang->timeanddate( wfTimestamp(TS_MW, $row->log_timestamp), true );
 260                 // User links
 261                 if( self::isDeleted($row,LogPage::DELETED_USER) ) {
 262                         $userLink = '<span class="history-deleted">' . wfMsgHtml( 'rev-deleted-user' ) . '</span>';
 263                 } else {
 264                         $userLink = $this->skin->userLink( $row->log_user, $row->user_name ) .
 265                                 $this->skin->userToolLinks( $row->log_user, $row->user_name, true, 0, $row->user_editcount );
 266                 }
 267                 // Comment
 268                 if( self::isDeleted($row,LogPage::DELETED_COMMENT) ) {
 269                         $comment = '<span class="history-deleted">' . wfMsgHtml('rev-deleted-comment') . '</span>';
 270                 } else {
 271                         $comment = $wgContLang->getDirMark() . $this->skin->commentBlock( $row->log_comment );
 272                 }
 273                 // Extract extra parameters
 274                 $paramArray = LogPage::extractParams( $row->log_params );
 275                 $revert = $del = '';
 276                 // Some user can hide log items and have review links
 277                 if( !($this->flags & self::NO_ACTION_LINK) && $wgUser->isAllowed( 'deleterevision' ) ) {
 278                         $del = $this->getShowHideLinks( $row ) . ' ';
 279                 }
 280                 // Add review links and such...
 281                 if( ($this->flags & self::NO_ACTION_LINK) || ($row->log_deleted & LogPage::DELETED_ACTION) ) {
 282                         // Action text is suppressed...
 283                 } else if( self::typeAction($row,'move','move','move') && !empty($paramArray[0]) ) {
 284                         $destTitle = Title::newFromText( $paramArray[0] );
 285                         if( $destTitle ) {
 286                                 $revert = '(' . $this->skin->link(
 287                                         SpecialPage::getTitleFor( 'Movepage' ),
 288                                         $this->message['revertmove'],
 289                                         array(),
 290                                         array(
 291                                                 'wpOldTitle' => $destTitle->getPrefixedDBkey(),
 292                                                 'wpNewTitle' => $title->getPrefixedDBkey(),
 293                                                 'wpReason' => wfMsgForContent( 'revertmove' ),
 294                                                 'wpMovetalk' => 0
 295                                         ),
 296                                         array( 'known', 'noclasses' )
 297                                 ) . ')';
 298                         }
 299                 // Show undelete link
 300                 } else if( self::typeAction($row,array('delete','suppress'),'delete','deletedhistory') ) {
 301                         if( !$wgUser->isAllowed( 'undelete' ) ) {
 302                                 $viewdeleted = $this->message['undeleteviewlink'];
 303                         } else {
 304                                 $viewdeleted = $this->message['undeletelink'];
 305                         }
 306
 307                         $revert = '(' . $this->skin->link(
 308                                 SpecialPage::getTitleFor( 'Undelete' ),
 309                                 $viewdeleted,
 310                                 array(),
 311                                 array( 'target' => $title->getPrefixedDBkey() ),
 312                                 array( 'known', 'noclasses' )
 313                          ) . ')';
 314                 // Show unblock/change block link
 315                 } else if( self::typeAction($row,array('block','suppress'),array('block','reblock'),'block') ) {
 316                         $revert = '(' .
 317                                 $this->skin->link(
 318                                         SpecialPage::getTitleFor( 'Ipblocklist' ),
 319                                         $this->message['unblocklink'],
 320                                         array(),
 321                                         array(
 322                                                 'action' => 'unblock',
 323                                                 'ip' => $row->log_title
 324                                         ),
 325                                         'known'
 326                                 ) .
 327                                 $this->message['pipe-separator'] .
 328                                 $this->skin->link(
 329                                         SpecialPage::getTitleFor( 'Blockip', $row->log_title ),
 330                                         $this->message['change-blocklink'],
 331                                         array(),
 332                                         array(),
 333                                         'known'
 334                                 ) .
 335                                 ')';
 336                 // Show change protection link
 337                 } else if( self::typeAction( $row, 'protect', array( 'modify', 'protect', 'unprotect' ) ) ) {
 338                         $revert .= ' (' .
 339                                 $this->skin->link( $title,
 340                                         $this->message['hist'],
 341                                         array(),
 342                                         array(
 343                                                 'action' => 'history',
 344                                                 'offset' => $row->log_timestamp
 345                                         )
 346                                 );
 347                         if( $wgUser->isAllowed( 'protect' ) ) {
 348                                 $revert .= $this->message['pipe-separator'] .
 349                                         $this->skin->link( $title,
 350                                                 $this->message['protect_change'],
 351                                                 array(),
 352                                                 array( 'action' => 'protect' ),
 353                                                 'known' );
 354                         }
 355                         $revert .= ')';
 356                 // Show unmerge link
 357                 } else if( self::typeAction($row,'merge','merge','mergehistory') ) {
 358                         $merge = SpecialPage::getTitleFor( 'Mergehistory' );
 359                         $revert = '(' .  $this->skin->link(
 360                                 $merge,
 361                                 $this->message['revertmerge'],
 362                                 array(),
 363                                 array(
 364                                         'target' => $paramArray[0],
 365                                         'dest' => $title->getPrefixedDBkey(),
 366                                         'mergepoint' => $paramArray[1]
 367                                 ),
 368                                 array( 'known', 'noclasses' )
 369                         ) . ')';
 370                 // If an edit was hidden from a page give a review link to the history
 371                 } else if( self::typeAction($row,array('delete','suppress'),'revision','deleterevision') ) {
 372                         if( count($paramArray) >= 2 ) {
 373                                 // Different revision types use different URL params...
 374                                 $key = $paramArray[0];
 375                                 // $paramArray[1] is a CSV of the IDs
 376                                 $Ids = explode( ',', $paramArray[1] );
 377                                 $query = $paramArray[1];
 378                                 $revert = array();
 379                                 // Diff link for single rev deletions
 380                                 if( count($Ids) == 1 ) {
 381                                         // Live revision diffs...
 382                                         if( in_array($key, array('oldid','revision')) ) {
 383                                                 $revert[] = $this->skin->link(
 384                                                         $title,
 385                                                         $this->message['diff'],
 386                                                         array(),
 387                                                         array(
 388                                                                 'diff' => intval( $Ids[0] ),
 389                                                                 'unhide' => 1
 390                                                         ),
 391                                                         array( 'known', 'noclasses' )
 392                                                 );
 393                                         // Deleted revision diffs...
 394                                         } else if( in_array($key, array('artimestamp','archive')) ) {
 395                                                 $revert[] = $this->skin->link(
 396                                                         SpecialPage::getTitleFor( 'Undelete' ),
 397                                                         $this->message['diff'],
 398                                                         array(),
 399                                                         array(
 400                                                                 'target'    => $title->getPrefixedDBKey(),
 401                                                                 'diff'      => 'prev',
 402                                                                 'timestamp' => $Ids[0]
 403                                                         ),
 404                                                         array( 'known', 'noclasses' )
 405                                                 );
 406                                         }
 407                                 }
 408                                 // View/modify link...
 409                                 $revert[] = $this->skin->link(
 410                                         SpecialPage::getTitleFor( 'Revisiondelete' ),
 411                                         $this->message['revdel-restore'],
 412                                         array(),
 413                                         array(
 414                                                 'target' => $title->getPrefixedText(),
 415                                                 'type' => $key,
 416                                                 'ids' => $query
 417                                         ),
 418                                         array( 'known', 'noclasses' )
 419                                 );
 420                                 // Pipe links
 421                                 $revert = wfMsg( 'parentheses', $wgLang->pipeList( $revert ) );
 422                         }
 423                 // Hidden log items, give review link
 424                 } else if( self::typeAction($row,array('delete','suppress'),'event','deleterevision') ) {
 425                         if( count($paramArray) >= 1 ) {
 426                                 $revdel = SpecialPage::getTitleFor( 'Revisiondelete' );
 427                                 // $paramArray[1] is a CSV of the IDs
 428                                 $Ids = explode( ',', $paramArray[0] );
 429                                 $query = $paramArray[0];
 430                                 // Link to each hidden object ID, $paramArray[1] is the url param
 431                                 $revert = '(' . $this->skin->link(
 432                                         $revdel,
 433                                         $this->message['revdel-restore'],
 434                                         array(),
 435                                         array(
 436                                                 'target' => $title->getPrefixedText(),
 437                                                 'type' => 'logging',
 438                                                 'ids' => $query
 439                                         ),
 440                                         array( 'known', 'noclasses' )
 441                                 ) . ')';
 442                         }
 443                 // Self-created users
 444                 } else if( self::typeAction($row,'newusers','create2') ) {
 445                         if( isset( $paramArray[0] ) ) {
 446                                 $revert = $this->skin->userToolLinks( $paramArray[0], $title->getDBkey(), true );
 447                         } else {
 448                                 # Fall back to a blue contributions link
 449                                 $revert = $this->skin->userToolLinks( 1, $title->getDBkey() );
 450                         }
 451                         if( $time < '20080129000000' ) {
 452                                 # Suppress $comment from old entries (before 2008-01-29),
 453                                 # not needed and can contain incorrect links
 454                                 $comment = '';
 455                         }
 456                 // Do nothing. The implementation is handled by the hook modifiying the passed-by-ref parameters.
 457                 } else {
 458                         wfRunHooks( 'LogLine', array( $row->log_type, $row->log_action, $title, $paramArray,
 459                                 &$comment, &$revert, $row->log_timestamp ) );
 460                 }
 461                 // Event description
 462                 if( self::isDeleted($row,LogPage::DELETED_ACTION) ) {
 463                         $action = '<span class="history-deleted">' . wfMsgHtml('rev-deleted-event') . '</span>';
 464                 } else {
 465                         $action = LogPage::actionText( $row->log_type, $row->log_action, $title,
 466                                 $this->skin, $paramArray, true );
 467                 }
 468
 469                 // Any tags...
 470                 list($tagDisplay, $newClasses) = ChangeTags::formatSummaryRow( $row->ts_tags, 'logevent' );
 471                 $classes = array_merge( $classes, $newClasses );
 472
 473                 if( $revert != '' ) {
 474                         $revert = '<span class="mw-logevent-actionlink">' . $revert . '</span>';
 475                 }
 476
 477                 $time = htmlspecialchars( $time );
 478
 479                 return Xml::tags( 'li', array( "class" => implode( ' ', $classes ) ),
 480                         $del . $time . ' ' . $userLink . ' ' . $action . ' ' . $comment . ' ' . $revert . " $tagDisplay" ) . "\n";
 481         }
 482
 483         /**
 484          * @param $row Row
 485          * @return string
 486          */
 487         private function getShowHideLinks( $row ) {
 488                 // If event was hidden from sysops
 489                 if( !self::userCan( $row, LogPage::DELETED_RESTRICTED ) ) {
 490                         $del = Xml::tags( 'span', array( 'class'=>'mw-revdelundel-link' ),
 491                                 '('.$this->message['rev-delundel'].')' );
 492                 } else if( $row->log_type == 'suppress' ) {
 493                         $del = ''; // No one should be hiding from the oversight log
 494                 } else {
 495                         $target = SpecialPage::getTitleFor( 'Log', $row->log_type );
 496                         $page = Title::makeTitle( $row->log_namespace, $row->log_title );
 497                         $query = array(
 498                                 'target' => $target->getPrefixedDBkey(),
 499                                 'type' => 'logging',
 500                                 'ids' => $row->log_id,
 501                         );
 502                         $del = $this->skin->revDeleteLink( $query,
 503                                 self::isDeleted( $row, LogPage::DELETED_RESTRICTED ) );
 504                 }
 505                 return $del;
 506         }
 507
 508         /**
 509          * @param $row Row
 510          * @param $type Mixed: string/array
 511          * @param $action Mixed: string/array
 512          * @param $right string
 513          * @return bool
 514          */
 515         public static function typeAction( $row, $type, $action, $right='' ) {
 516                 $match = is_array($type) ?
 517                         in_array($row->log_type,$type) : $row->log_type == $type;
 518                 if( $match ) {
 519                         $match = is_array($action) ?
 520                                 in_array($row->log_action,$action) : $row->log_action == $action;
 521                         if( $match && $right ) {
 522                                 global $wgUser;
 523                                 $match = $wgUser->isAllowed( $right );
 524                         }
 525                 }
 526                 return $match;
 527         }
 528
 529         /**
 530          * Determine if the current user is allowed to view a particular
 531          * field of this log row, if it's marked as deleted.
 532          * @param $row Row
 533          * @param $field Integer
 534          * @return Boolean
 535          */
 536         public static function userCan( $row, $field ) {
 537                 if( ( $row->log_deleted & $field ) == $field ) {
 538                         global $wgUser;
 539                         $permission = ( $row->log_deleted & LogPage::DELETED_RESTRICTED ) == LogPage::DELETED_RESTRICTED
 540                                 ? 'suppressrevision'
 541                                 : 'deleterevision';
 542                         wfDebug( "Checking for $permission due to $field match on $row->log_deleted\n" );
 543                         return $wgUser->isAllowed( $permission );
 544                 } else {
 545                         return true;
 546                 }
 547         }
 548
 549         /**
 550          * @param $row Row
 551          * @param $field Integer: one of DELETED_* bitfield constants
 552          * @return Boolean
 553          */
 554         public static function isDeleted( $row, $field ) {
 555                 return ($row->log_deleted & $field) == $field;
 556         }
 557
 558         /**
 559          * Quick function to show a short log extract
 560          * @param $out OutputPage
 561          * @param $types String or Array
 562          * @param $page String
 563          * @param $user String
 564          * @param $lim Integer
 565          * @param $conds Array
 566          */
 567         public static function showLogExtract( $out, $types=array(), $page='', $user='', $lim=0, $conds=array() ) {
 568                 global $wgUser;
 569                 # Insert list of top 50 or so items
 570                 $loglist = new LogEventsList( $wgUser->getSkin(), $out, 0 );
 571                 $pager = new LogPager( $loglist, $types, $user, $page, '', $conds );
 572                 if( $lim > 0 ) $pager->mLimit = $lim;
 573                 $logBody = $pager->getBody();
 574                 if( $logBody ) {
 575                         $out->addHTML(
 576                                 $loglist->beginLogEventsList() .
 577                                 $logBody .
 578                                 $loglist->endLogEventsList()
 579                         );
 580                 } else {
 581                         $out->addWikiMsg( 'logempty' );
 582                 }
 583                 return $pager->getNumRows();
 584         }
 585
 586         /**
 587          * SQL clause to skip forbidden log types for this user
 588          * @param $db Database
 589          * @param $audience string, public/user
 590          * @return mixed (string or false)
 591          */
 592         public static function getExcludeClause( $db, $audience = 'public' ) {
 593                 global $wgLogRestrictions, $wgUser;
 594                 // Reset the array, clears extra "where" clauses when $par is used
 595                 $hiddenLogs = array();
 596                 // Don't show private logs to unprivileged users
 597                 foreach( $wgLogRestrictions as $logType => $right ) {
 598                         if( $audience == 'public' || !$wgUser->isAllowed($right) ) {
 599                                 $safeType = $db->strencode( $logType );
 600                                 $hiddenLogs[] = $safeType;
 601                         }
 602                 }
 603                 if( count($hiddenLogs) == 1 ) {
 604                         return 'log_type != ' . $db->addQuotes( $hiddenLogs[0] );
 605                 } elseif( $hiddenLogs ) {
 606                         return 'log_type NOT IN (' . $db->makeList($hiddenLogs) . ')';
 607                 }
 608                 return false;
 609         }
 610 }
 611
 612 /**
 613  * @ingroup Pager
 614  */
 615 class LogPager extends ReverseChronologicalPager {
 616         private $types = array(), $user = '', $title = '', $pattern = '';
 617         private $typeCGI = '';
 618         public $mLogEventsList;
 619
 620         /**
 621          * constructor
 622          * @param $list LogEventsList
 623          * @param $types String or Array
 624          * @param $user String
 625          * @param $title String
 626          * @param $pattern String
 627          * @param $conds Array
 628          * @param $year Integer
 629          * @param $month Integer
 630          */
 631         public function __construct( $list, $types = array(), $user = '', $title = '', $pattern = '',
 632                 $conds = array(), $year = false, $month = false, $tagFilter = '' )
 633         {
 634                 parent::__construct();
 635                 $this->mConds = $conds;
 636
 637                 $this->mLogEventsList = $list;
 638
 639                 $this->limitType( $types ); // also excludes hidden types
 640                 $this->limitUser( $user );
 641                 $this->limitTitle( $title, $pattern );
 642                 $this->getDateCond( $year, $month );
 643                 $this->mTagFilter = $tagFilter;
 644         }
 645
 646         public function getDefaultQuery() {
 647                 $query = parent::getDefaultQuery();
 648                 $query['type'] = $this->typeCGI; // arrays won't work here
 649                 $query['user'] = $this->user;
 650                 $query['month'] = $this->mMonth;
 651                 $query['year'] = $this->mYear;
 652                 return $query;
 653         }
 654
 655         // Call ONLY after calling $this->limitType() already!
 656         public function getFilterParams() {
 657                 global $wgFilterLogTypes, $wgUser, $wgRequest;
 658                 $filters = array();
 659                 if( count($this->types) ) {
 660                         return $filters;
 661                 }
 662                 foreach( $wgFilterLogTypes as $type => $default ) {
 663                         // Avoid silly filtering
 664                         if( $type !== 'patrol' || $wgUser->useNPPatrol() ) {
 665                                 $hide = $wgRequest->getInt( "hide_{$type}_log", $default );
 666                                 $filters[$type] = $hide;
 667                                 if( $hide )
 668                                         $this->mConds[] = 'log_type != ' . $this->mDb->addQuotes( $type );
 669                         }
 670                 }
 671                 return $filters;
 672         }
 673
 674         /**
 675          * Set the log reader to return only entries of the given type.
 676          * Type restrictions enforced here
 677          * @param $types String or array: Log types ('upload', 'delete', etc);
 678          *   empty string means no restriction
 679          */
 680         private function limitType( $types ) {
 681                 global $wgLogRestrictions, $wgUser;
 682                 // If $types is not an array, make it an array
 683                 $types = ($types === '') ? array() : (array)$types;
 684                 // Don't even show header for private logs; don't recognize it...
 685                 foreach ( $types as $type ) {
 686                         if( isset( $wgLogRestrictions[$type] ) && !$wgUser->isAllowed($wgLogRestrictions[$type]) ) {
 687                                 $types = array_diff( $types, array( $type ) );
 688                         }
 689                 }
 690                 // Don't show private logs to unprivileged users.
 691                 // Also, only show them upon specific request to avoid suprises.
 692                 $audience = $types ? 'user' : 'public';
 693                 $hideLogs = LogEventsList::getExcludeClause( $this->mDb, $audience );
 694                 if( $hideLogs !== false ) {
 695                         $this->mConds[] = $hideLogs;
 696                 }
 697                 if( count($types) ) {
 698                         $this->types = $types;
 699                         $this->mConds['log_type'] = $types;
 700                         // Set typeCGI; used in url param for paging
 701                         if( count($types) == 1 ) $this->typeCGI = $types[0];
 702                 }
 703         }
 704
 705         /**
 706          * Set the log reader to return only entries by the given user.
 707          * @param $name String: (In)valid user name
 708          */
 709         private function limitUser( $name ) {
 710                 if( $name == '' ) {
 711                         return false;
 712                 }
 713                 $usertitle = Title::makeTitleSafe( NS_USER, $name );
 714                 if( is_null($usertitle) ) {
 715                         return false;
 716                 }
 717                 /* Fetch userid at first, if known, provides awesome query plan afterwards */
 718                 $userid = User::idFromName( $name );
 719                 if( !$userid ) {
 720                         /* It should be nicer to abort query at all,
 721                            but for now it won't pass anywhere behind the optimizer */
 722                         $this->mConds[] = "NULL";
 723                 } else {
 724                         global $wgUser;
 725                         $this->mConds['log_user'] = $userid;
 726                         // Paranoia: avoid brute force searches (bug 17342)
 727                         if( !$wgUser->isAllowed( 'deleterevision' ) ) {
 728                                 $this->mConds[] = $this->mDb->bitAnd('log_deleted', LogPage::DELETED_USER) . ' = 0';
 729                         } else if( !$wgUser->isAllowed( 'suppressrevision' ) ) {
 730                                 $this->mConds[] = $this->mDb->bitAnd('log_deleted', LogPage::SUPPRESSED_USER) .
 731                                         ' != ' . LogPage::SUPPRESSED_USER;
 732                         }
 733                         $this->user = $usertitle->getText();
 734                 }
 735         }
 736
 737         /**
 738          * Set the log reader to return only entries affecting the given page.
 739          * (For the block and rights logs, this is a user page.)
 740          * @param $page String: Title name as text
 741          * @param $pattern String
 742          */
 743         private function limitTitle( $page, $pattern ) {
 744                 global $wgMiserMode, $wgUser;
 745
 746                 $title = Title::newFromText( $page );
 747                 if( strlen($page) == 0 || !$title instanceof Title )
 748                         return false;
 749
 750                 $this->title = $title->getPrefixedText();
 751                 $ns = $title->getNamespace();
 752                 # Using the (log_namespace, log_title, log_timestamp) index with a
 753                 # range scan (LIKE) on the first two parts, instead of simple equality,
 754                 # makes it unusable for sorting.  Sorted retrieval using another index
 755                 # would be possible, but then we might have to scan arbitrarily many
 756                 # nodes of that index. Therefore, we need to avoid this if $wgMiserMode
 757                 # is on.
 758                 #
 759                 # This is not a problem with simple title matches, because then we can
 760                 # use the page_time index.  That should have no more than a few hundred
 761                 # log entries for even the busiest pages, so it can be safely scanned
 762                 # in full to satisfy an impossible condition on user or similar.
 763                 if( $pattern && !$wgMiserMode ) {
 764                         # use escapeLike to avoid expensive search patterns like 't%st%'
 765                         $safetitle = $this->mDb->escapeLike( $title->getDBkey() );
 766                         $this->mConds['log_namespace'] = $ns;
 767                         $this->mConds[] = "log_title LIKE '$safetitle%'";
 768                         $this->pattern = $pattern;
 769                 } else {
 770                         $this->mConds['log_namespace'] = $ns;
 771                         $this->mConds['log_title'] = $title->getDBkey();
 772                 }
 773                 // Paranoia: avoid brute force searches (bug 17342)
 774                 if( !$wgUser->isAllowed( 'deleterevision' ) ) {
 775                         $this->mConds[] = $this->mDb->bitAnd('log_deleted', LogPage::DELETED_ACTION) . ' = 0';
 776                 } else if( !$wgUser->isAllowed( 'suppressrevision' ) ) {
 777                         $this->mConds[] = $this->mDb->bitAnd('log_deleted', LogPage::SUPPRESSED_ACTION) .
 778                                 ' != ' . LogPage::SUPPRESSED_ACTION;
 779                 }
 780         }
 781
 782         public function getQueryInfo() {
 783                 $tables = array( 'logging', 'user' );
 784                 $this->mConds[] = 'user_id = log_user';
 785                 $groupBy = false;
 786                 # Add log_search table if there are conditions on it
 787                 if( array_key_exists('ls_field',$this->mConds) ) {
 788                         $tables[] = 'log_search';
 789                         $index = array( 'log_search' => 'ls_field_val', 'logging' => 'PRIMARY' );
 790                         $groupBy = 'ls_log_id';
 791                 # Don't use the wrong logging index
 792                 } else if( $this->title || $this->pattern || $this->user ) {
 793                         $index = array( 'logging' => array('page_time','user_time') );
 794                 } else if( $this->types ) {
 795                         $index = array( 'logging' => 'type_time' );
 796                 } else {
 797                         $index = array( 'logging' => 'times' );
 798                 }
 799                 $options = array( 'USE INDEX' => $index );
 800                 # Don't show duplicate rows when using log_search
 801                 if( $groupBy ) $options['GROUP BY'] = $groupBy;
 802                 $info = array(
 803                         'tables'     => $tables,
 804                         'fields'     => array( 'log_type', 'log_action', 'log_user', 'log_namespace',
 805                                 'log_title', 'log_params', 'log_comment', 'log_id', 'log_deleted',
 806                                 'log_timestamp', 'user_name', 'user_editcount' ),
 807                         'conds'      => $this->mConds,
 808                         'options'    => $options,
 809                         'join_conds' => array(
 810                                 'user' => array( 'INNER JOIN', 'user_id=log_user' ),
 811                                 'log_search' => array( 'INNER JOIN', 'ls_log_id=log_id' )
 812                         )
 813                 );
 814                 # Add ChangeTags filter query
 815                 ChangeTags::modifyDisplayQuery( $info['tables'], $info['fields'], $info['conds'],
 816                         $info['join_conds'], $info['options'], $this->mTagFilter );
 817
 818                 return $info;
 819         }
 820
 821         function getIndexField() {
 822                 return 'log_timestamp';
 823         }
 824
 825         public function getStartBody() {
 826                 wfProfileIn( __METHOD__ );
 827                 # Do a link batch query
 828                 if( $this->getNumRows() > 0 ) {
 829                         $lb = new LinkBatch;
 830                         while( $row = $this->mResult->fetchObject() ) {
 831                                 $lb->add( $row->log_namespace, $row->log_title );
 832                                 $lb->addObj( Title::makeTitleSafe( NS_USER, $row->user_name ) );
 833                                 $lb->addObj( Title::makeTitleSafe( NS_USER_TALK, $row->user_name ) );
 834                         }
 835                         $lb->execute();
 836                         $this->mResult->seek( 0 );
 837                 }
 838                 wfProfileOut( __METHOD__ );
 839                 return '';
 840         }
 841
 842         public function formatRow( $row ) {
 843                 return $this->mLogEventsList->logLine( $row );
 844         }
 845
 846         public function getType() {
 847                 return $this->types;
 848         }
 849
 850         public function getUser() {
 851                 return $this->user;
 852         }
 853
 854         public function getPage() {
 855                 return $this->title;
 856         }
 857
 858         public function getPattern() {
 859                 return $this->pattern;
 860         }
 861
 862         public function getYear() {
 863                 return $this->mYear;
 864         }
 865
 866         public function getMonth() {
 867                 return $this->mMonth;
 868         }
 869
 870         public function getTagFilter() {
 871                 return $this->mTagFilter;
 872         }
 873
 874         public function doQuery() {
 875                 // Workaround MySQL optimizer bug
 876                 $this->mDb->setBigSelects();
 877                 parent::doQuery();
 878                 $this->mDb->setBigSelects( 'default' );
 879         }
 880 }
 881
 882 /**
 883  * @deprecated
 884  * @ingroup SpecialPage
 885  */
 886 class LogReader {
 887         var $pager;
 888         /**
 889          * @param $request WebRequest: for internal use use a FauxRequest object to pass arbitrary parameters.
 890          */
 891         function __construct( $request ) {
 892                 global $wgUser, $wgOut;
 893                 wfDeprecated(__METHOD__);
 894                 # Get parameters
 895                 $type = $request->getVal( 'type' );
 896                 $user = $request->getText( 'user' );
 897                 $title = $request->getText( 'page' );
 898                 $pattern = $request->getBool( 'pattern' );
 899                 $year = $request->getIntOrNull( 'year' );
 900                 $month = $request->getIntOrNull( 'month' );
 901                 $tagFilter = $request->getVal( 'tagfilter' );
 902                 # Don't let the user get stuck with a certain date
 903                 $skip = $request->getText( 'offset' ) || $request->getText( 'dir' ) == 'prev';
 904                 if( $skip ) {
 905                         $year = '';
 906                         $month = '';
 907                 }
 908                 # Use new list class to output results
 909                 $loglist = new LogEventsList( $wgUser->getSkin(), $wgOut, 0 );
 910                 $this->pager = new LogPager( $loglist, $type, $user, $title, $pattern, $year, $month, $tagFilter );
 911         }
 912
 913         /**
 914         * Is there at least one row?
 915         * @return bool
 916         */
 917         public function hasRows() {
 918                 return isset($this->pager) ? ($this->pager->getNumRows() > 0) : false;
 919         }
 920 }
 921
 922 /**
 923  * @deprecated
 924  * @ingroup SpecialPage
 925  */
 926 class LogViewer {
 927         const NO_ACTION_LINK = 1;
 928
 929         /**
 930          * LogReader object
 931          */
 932         var $reader;
 933
 934         /**
 935          * @param &$reader LogReader: where to get our data from
 936          * @param $flags Integer: Bitwise combination of flags:
 937          *     LogEventsList::NO_ACTION_LINK   Don't show restore/unblock/block links
 938          */
 939         function __construct( &$reader, $flags = 0 ) {
 940                 wfDeprecated(__METHOD__);
 941                 $this->reader =& $reader;
 942                 $this->reader->pager->mLogEventsList->flags = $flags;
 943                 # Aliases for shorter code...
 944                 $this->pager =& $this->reader->pager;
 945                 $this->list =& $this->reader->pager->mLogEventsList;
 946         }
 947
 948         /**
 949          * Take over the whole output page in $wgOut with the log display.
 950          */
 951         public function show() {
 952                 # Set title and add header
 953                 $this->list->showHeader( $pager->getType() );
 954                 # Show form options
 955                 $this->list->showOptions( $this->pager->getType(), $this->pager->getUser(), $this->pager->getPage(),
 956                         $this->pager->getPattern(), $this->pager->getYear(), $this->pager->getMonth() );
 957                 # Insert list
 958                 $logBody = $this->pager->getBody();
 959                 if( $logBody ) {
 960                         $wgOut->addHTML(
 961                                 $this->pager->getNavigationBar() .
 962                                 $this->list->beginLogEventsList() .
 963                                 $logBody .
 964                                 $this->list->endLogEventsList() .
 965                                 $this->pager->getNavigationBar()
 966                         );
 967                 } else {
 968                         $wgOut->addWikiMsg( 'logempty' );
 969                 }
 970         }
 971
 972         /**
 973          * Output just the list of entries given by the linked LogReader,
 974          * with extraneous UI elements. Use for displaying log fragments in
 975          * another page (eg at Special:Undelete)
 976          * @param $out OutputPage: where to send output
 977          */
 978         public function showList( &$out ) {
 979                 $logBody = $this->pager->getBody();
 980                 if( $logBody ) {
 981                         $out->addHTML(
 982                                 $this->list->beginLogEventsList() .
 983                                 $logBody .
 984                                 $this->list->endLogEventsList()
 985                         );
 986                 } else {
 987                         $out->addWikiMsg( 'logempty' );
 988                 }
 989         }
 990 }