includes/LogEventsList.php

   1 <?php
   2 /**
   3  * Contain classes to list log entries
   4  *
   5  * Copyright © 2004 Brion Vibber <brion@pobox.com>, 2008 Aaron Schulz
   6  * http://www.mediawiki.org/
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License as published by
  10  * the Free Software Foundation; either version 2 of the License, or
  11  * (at your option) any later version.
  12  *
  13  * This program is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  16  * GNU General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU General Public License along
  19  * with this program; if not, write to the Free Software Foundation, Inc.,
  20  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  21  * http://www.gnu.org/copyleft/gpl.html
  22  *
  23  * @file
  24  */
  25
  26 class LogEventsList {
  27         const NO_ACTION_LINK = 1;
  28         const NO_EXTRA_USER_LINKS = 2;
  29
  30         /**
  31          * @var Skin
  32          */
  33         private $skin;
  34
  35         /**
  36          * @var OutputPage
  37          */
  38         private $out;
  39         public $flags;
  40
  41         /**
  42          * @var Array
  43          */
  44         protected $message;
  45
  46         /**
  47          * @var Array
  48          */
  49         protected $mDefaultQuery;
  50
  51         public function __construct( $skin, $out, $flags = 0 ) {
  52                 $this->skin = $skin;
  53                 $this->out = $out;
  54                 $this->flags = $flags;
  55                 $this->preCacheMessages();
  56         }
  57
  58         /**
  59          * As we use the same small set of messages in various methods and that
  60          * they are called often, we call them once and save them in $this->message
  61          */
  62         private function preCacheMessages() {
  63                 // Precache various messages
  64                 if( !isset( $this->message ) ) {
  65                         $messages = array( 'revertmerge', 'protect_change', 'unblocklink', 'change-blocklink',
  66                                 'revertmove', 'undeletelink', 'undeleteviewlink', 'revdel-restore', 'hist', 'diff',
  67                                 'pipe-separator', 'revdel-restore-deleted', 'revdel-restore-visible' );
  68                         foreach( $messages as $msg ) {
  69                                 $this->message[$msg] = wfMsgExt( $msg, array( 'escapenoentities' ) );
  70                         }
  71                 }
  72         }
  73
  74         /**
  75          * Set page title and show header for this log type
  76          * @param $type Array
  77          */
  78         public function showHeader( $type ) {
  79                 // If only one log type is used, then show a special message...
  80                 $headerType = (count($type) == 1) ? $type[0] : '';
  81                 if( LogPage::isLogType( $headerType ) ) {
  82                         $this->out->setPageTitle( LogPage::logName( $headerType ) );
  83                         $this->out->addHTML( LogPage::logHeader( $headerType ) );
  84                 } else {
  85                         $this->out->addHTML( wfMsgExt('alllogstext',array('parseinline')) );
  86                 }
  87         }
  88
  89         /**
  90          * Show options for the log list
  91          *
  92          * @param $types string or Array
  93          * @param $user String
  94          * @param $page String
  95          * @param $pattern String
  96          * @param $year Integer: year
  97          * @param $month Integer: month
  98          * @param $filter: array
  99          * @param $tagFilter: array?
 100          */
 101         public function showOptions( $types=array(), $user='', $page='', $pattern='', $year='',
 102                 $month = '', $filter = null, $tagFilter='' ) {
 103                 global $wgScript, $wgMiserMode;
 104
 105                 $action = $wgScript;
 106                 $title = SpecialPage::getTitleFor( 'Log' );
 107                 $special = $title->getPrefixedDBkey();
 108
 109                 // For B/C, we take strings, but make sure they are converted...
 110                 $types = ($types === '') ? array() : (array)$types;
 111
 112                 $tagSelector = ChangeTags::buildTagFilterSelector( $tagFilter );
 113
 114                 $html = Html::hidden( 'title', $special );
 115
 116                 // Basic selectors
 117                 $html .= $this->getTypeMenu( $types ) . "\n";
 118                 $html .= $this->getUserInput( $user ) . "\n";
 119                 $html .= $this->getTitleInput( $page ) . "\n";
 120                 $html .= $this->getExtraInputs( $types ) . "\n";
 121
 122                 // Title pattern, if allowed
 123                 if (!$wgMiserMode) {
 124                         $html .= $this->getTitlePattern( $pattern ) . "\n";
 125                 }
 126
 127                 // date menu
 128                 $html .= Xml::tags( 'p', null, Xml::dateMenu( $year, $month ) );
 129
 130                 // Tag filter
 131                 if ($tagSelector) {
 132                         $html .= Xml::tags( 'p', null, implode( '&#160;', $tagSelector ) );
 133                 }
 134
 135                 // Filter links
 136                 if ($filter) {
 137                         $html .= Xml::tags( 'p', null, $this->getFilterLinks( $filter ) );
 138                 }
 139
 140                 // Submit button
 141                 $html .= Xml::submitButton( wfMsg( 'allpagessubmit' ) );
 142
 143                 // Fieldset
 144                 $html = Xml::fieldset( wfMsg( 'log' ), $html );
 145
 146                 // Form wrapping
 147                 $html = Xml::tags( 'form', array( 'action' => $action, 'method' => 'get' ), $html );
 148
 149                 $this->out->addHTML( $html );
 150         }
 151
 152         /**
 153          * @param $filter Array
 154          * @return String: Formatted HTML
 155          */
 156         private function getFilterLinks( $filter ) {
 157                 global $wgLang;
 158                 // show/hide links
 159                 $messages = array( wfMsgHtml( 'show' ), wfMsgHtml( 'hide' ) );
 160                 // Option value -> message mapping
 161                 $links = array();
 162                 $hiddens = ''; // keep track for "go" button
 163                 foreach( $filter as $type => $val ) {
 164                         // Should the below assignment be outside the foreach?
 165                         // Then it would have to be copied. Not certain what is more expensive.
 166                         $query = $this->getDefaultQuery();
 167                         $queryKey = "hide_{$type}_log";
 168
 169                         $hideVal = 1 - intval($val);
 170                         $query[$queryKey] = $hideVal;
 171
 172                         $link = $this->skin->link(
 173                                 $this->out->getTitle(),
 174                                 $messages[$hideVal],
 175                                 array(),
 176                                 $query,
 177                                 array( 'known', 'noclasses' )
 178                         );
 179
 180                         $links[$type] = wfMsgHtml( "log-show-hide-{$type}", $link );
 181                         $hiddens .= Html::hidden( "hide_{$type}_log", $val ) . "\n";
 182                 }
 183                 // Build links
 184                 return '<small>'.$wgLang->pipeList( $links ) . '</small>' . $hiddens;
 185         }
 186
 187         private function getDefaultQuery() {
 188                 global $wgRequest;
 189
 190                 if ( !isset( $this->mDefaultQuery ) ) {
 191                         $this->mDefaultQuery = $wgRequest->getQueryValues();
 192                         unset( $this->mDefaultQuery['title'] );
 193                         unset( $this->mDefaultQuery['dir'] );
 194                         unset( $this->mDefaultQuery['offset'] );
 195                         unset( $this->mDefaultQuery['limit'] );
 196                         unset( $this->mDefaultQuery['order'] );
 197                         unset( $this->mDefaultQuery['month'] );
 198                         unset( $this->mDefaultQuery['year'] );
 199                 }
 200                 return $this->mDefaultQuery;
 201         }
 202
 203         /**
 204          * @param $queryTypes Array
 205          * @return String: Formatted HTML
 206          */
 207         private function getTypeMenu( $queryTypes ) {
 208                 global $wgLogRestrictions, $wgUser;
 209
 210                 $html = "<select name='type'>\n";
 211
 212                 $validTypes = LogPage::validTypes();
 213                 $typesByName = array(); // Temporary array
 214
 215                 // First pass to load the log names
 216                 foreach( $validTypes as $type ) {
 217                         $text = LogPage::logName( $type );
 218                         $typesByName[$type] = $text;
 219                 }
 220
 221                 // Second pass to sort by name
 222                 asort($typesByName);
 223
 224                 // Note the query type
 225                 $queryType = count($queryTypes) == 1 ? $queryTypes[0] : '';
 226
 227                 // Always put "All public logs" on top
 228                 if ( isset( $typesByName[''] ) ) {
 229                         $all = $typesByName[''];
 230                         unset( $typesByName[''] );
 231                         $typesByName = array( '' => $all ) + $typesByName;
 232                 }
 233
 234                 // Third pass generates sorted XHTML content
 235                 foreach( $typesByName as $type => $text ) {
 236                         $selected = ($type == $queryType);
 237                         // Restricted types
 238                         if ( isset($wgLogRestrictions[$type]) ) {
 239                                 if ( $wgUser->isAllowed( $wgLogRestrictions[$type] ) ) {
 240                                         $html .= Xml::option( $text, $type, $selected ) . "\n";
 241                                 }
 242                         } else {
 243                                 $html .= Xml::option( $text, $type, $selected ) . "\n";
 244                         }
 245                 }
 246
 247                 $html .= '</select>';
 248                 return $html;
 249         }
 250
 251         /**
 252          * @param $user String
 253          * @return String: Formatted HTML
 254          */
 255         private function getUserInput( $user ) {
 256                 return '<span style="white-space: nowrap">' .
 257                         Xml::inputLabel( wfMsg( 'specialloguserlabel' ), 'user', 'mw-log-user', 15, $user ) .
 258                         '</span>';
 259         }
 260
 261         /**
 262          * @param $title String
 263          * @return String: Formatted HTML
 264          */
 265         private function getTitleInput( $title ) {
 266                 return '<span style="white-space: nowrap">' .
 267                         Xml::inputLabel( wfMsg( 'speciallogtitlelabel' ), 'page', 'mw-log-page', 20, $title ) .
 268                         '</span>';
 269         }
 270
 271         /**
 272          * @return boolean Checkbox
 273          */
 274         private function getTitlePattern( $pattern ) {
 275                 return '<span style="white-space: nowrap">' .
 276                         Xml::checkLabel( wfMsg( 'log-title-wildcard' ), 'pattern', 'pattern', $pattern ) .
 277                         '</span>';
 278         }
 279
 280         private function getExtraInputs( $types ) {
 281                 global $wgRequest;
 282                 $offender = $wgRequest->getVal('offender');
 283                 $user = User::newFromName( $offender, false );
 284                 if( !$user || ($user->getId() == 0 && !IP::isIPAddress($offender) ) ) {
 285                         $offender = ''; // Blank field if invalid
 286                 }
 287                 if( count($types) == 1 && $types[0] == 'suppress' ) {
 288                         return Xml::inputLabel( wfMsg('revdelete-offender'), 'offender',
 289                                 'mw-log-offender', 20, $offender );
 290                 }
 291                 return '';
 292         }
 293
 294         public function beginLogEventsList() {
 295                 return "<ul>\n";
 296         }
 297
 298         public function endLogEventsList() {
 299                 return "</ul>\n";
 300         }
 301
 302         /**
 303          * @param $row Row: a single row from the result set
 304          * @return String: Formatted HTML list item
 305          */
 306         public function logLine( $row ) {
 307                 $classes = array( 'mw-logline-' . $row->log_type );
 308                 $title = Title::makeTitle( $row->log_namespace, $row->log_title );
 309                 // Log time
 310                 $time = $this->logTimestamp( $row );
 311                 // User links
 312                 $userLink = $this->logUserLinks( $row );
 313                 // Extract extra parameters
 314                 $paramArray = LogPage::extractParams( $row->log_params );
 315                 // Event description
 316                 $action = $this->logAction( $row, $title, $paramArray );
 317                 // Log comment
 318                 $comment = $this->logComment( $row );
 319                 // Add review/revert links and such...
 320                 $revert = $this->logActionLinks( $row, $title, $paramArray, $comment );
 321
 322                 // Some user can hide log items and have review links
 323                 $del = $this->getShowHideLinks( $row );
 324                 if( $del != '' ) $del .= ' ';
 325
 326                 // Any tags...
 327                 list( $tagDisplay, $newClasses ) = ChangeTags::formatSummaryRow( $row->ts_tags, 'logevent' );
 328                 $classes = array_merge( $classes, $newClasses );
 329
 330                 return Xml::tags( 'li', array( "class" => implode( ' ', $classes ) ),
 331                         $del . "$time $userLink $action $comment $revert $tagDisplay" ) . "\n";
 332         }
 333
 334         private function logTimestamp( $row ) {
 335                 global $wgLang;
 336                 $time = $wgLang->timeanddate( wfTimestamp( TS_MW, $row->log_timestamp ), true );
 337                 return htmlspecialchars( $time );
 338         }
 339
 340         private function logUserLinks( $row ) {
 341                 if( self::isDeleted( $row, LogPage::DELETED_USER ) ) {
 342                         $userLinks = '<span class="history-deleted">' .
 343                                 wfMsgHtml( 'rev-deleted-user' ) . '</span>';
 344                 } else {
 345                         $userLinks = $this->skin->userLink( $row->log_user, $row->user_name );
 346                         // Talk|Contribs links...
 347                         if( !( $this->flags & self::NO_EXTRA_USER_LINKS ) ) {
 348                                 $userLinks .= $this->skin->userToolLinks(
 349                                         $row->log_user, $row->user_name, true, 0, $row->user_editcount );
 350                         }
 351                 }
 352                 return $userLinks;
 353         }
 354
 355         private function logAction( $row, $title, $paramArray ) {
 356                 if( self::isDeleted( $row, LogPage::DELETED_ACTION ) ) {
 357                         $action = '<span class="history-deleted">' .
 358                                 wfMsgHtml( 'rev-deleted-event' ) . '</span>';
 359                 } else {
 360                         $action = LogPage::actionText(
 361                                 $row->log_type, $row->log_action, $title, $this->skin, $paramArray, true );
 362                 }
 363                 return $action;
 364         }
 365
 366         private function logComment( $row ) {
 367                 global $wgContLang;
 368                 if( self::isDeleted( $row, LogPage::DELETED_COMMENT ) ) {
 369                         $comment = '<span class="history-deleted">' .
 370                                 wfMsgHtml( 'rev-deleted-comment' ) . '</span>';
 371                 } else {
 372                         $comment = $wgContLang->getDirMark() .
 373                                 $this->skin->commentBlock( $row->log_comment );
 374                 }
 375                 return $comment;
 376         }
 377
 378         /**
 379          * @TODO: split up!
 380          *
 381          * @param  $row
 382          * @param Title $title
 383          * @param Array $paramArray
 384          * @param  $comment
 385          * @return String
 386          */
 387         private function logActionLinks( $row, $title, $paramArray, &$comment ) {
 388                 global $wgUser;
 389                 if( ( $this->flags & self::NO_ACTION_LINK ) // we don't want to see the action
 390                         || self::isDeleted( $row, LogPage::DELETED_ACTION ) ) // action is hidden
 391                 {
 392                         return '';
 393                 }
 394                 $revert = '';
 395                 if( self::typeAction( $row, 'move', 'move', 'move' ) && !empty( $paramArray[0] ) ) {
 396                         $destTitle = Title::newFromText( $paramArray[0] );
 397                         if( $destTitle ) {
 398                                 $revert = '(' . $this->skin->link(
 399                                         SpecialPage::getTitleFor( 'Movepage' ),
 400                                         $this->message['revertmove'],
 401                                         array(),
 402                                         array(
 403                                                 'wpOldTitle' => $destTitle->getPrefixedDBkey(),
 404                                                 'wpNewTitle' => $title->getPrefixedDBkey(),
 405                                                 'wpReason'   => wfMsgForContent( 'revertmove' ),
 406                                                 'wpMovetalk' => 0
 407                                         ),
 408                                         array( 'known', 'noclasses' )
 409                                 ) . ')';
 410                         }
 411                 // Show undelete link
 412                 } else if( self::typeAction( $row, array( 'delete', 'suppress' ), 'delete', 'deletedhistory' ) ) {
 413                         if( !$wgUser->isAllowed( 'undelete' ) ) {
 414                                 $viewdeleted = $this->message['undeleteviewlink'];
 415                         } else {
 416                                 $viewdeleted = $this->message['undeletelink'];
 417                         }
 418                         $revert = '(' . $this->skin->link(
 419                                 SpecialPage::getTitleFor( 'Undelete' ),
 420                                 $viewdeleted,
 421                                 array(),
 422                                 array( 'target' => $title->getPrefixedDBkey() ),
 423                                 array( 'known', 'noclasses' )
 424                          ) . ')';
 425                 // Show unblock/change block link
 426                 } else if( self::typeAction( $row, array( 'block', 'suppress' ), array( 'block', 'reblock' ), 'block' ) ) {
 427                         $revert = '(' .
 428                                 $this->skin->link(
 429                                         SpecialPage::getTitleFor( 'Unblock', $row->log_title ),
 430                                         $this->message['unblocklink'],
 431                                         array(),
 432                                         array(),
 433                                         'known'
 434                                 ) .
 435                                 $this->message['pipe-separator'] .
 436                                 $this->skin->link(
 437                                         SpecialPage::getTitleFor( 'Block', $row->log_title ),
 438                                         $this->message['change-blocklink'],
 439                                         array(),
 440                                         array(),
 441                                         'known'
 442                                 ) .
 443                                 ')';
 444                 // Show change protection link
 445                 } else if( self::typeAction( $row, 'protect', array( 'modify', 'protect', 'unprotect' ) ) ) {
 446                         $revert .= ' (' .
 447                                 $this->skin->link( $title,
 448                                         $this->message['hist'],
 449                                         array(),
 450                                         array(
 451                                                 'action' => 'history',
 452                                                 'offset' => $row->log_timestamp
 453                                         )
 454                                 );
 455                         if( $wgUser->isAllowed( 'protect' ) ) {
 456                                 $revert .= $this->message['pipe-separator'] .
 457                                         $this->skin->link( $title,
 458                                                 $this->message['protect_change'],
 459                                                 array(),
 460                                                 array( 'action' => 'protect' ),
 461                                                 'known' );
 462                         }
 463                         $revert .= ')';
 464                 // Show unmerge link
 465                 } else if( self::typeAction( $row, 'merge', 'merge', 'mergehistory' ) ) {
 466                         $revert = '(' . $this->skin->link(
 467                                 SpecialPage::getTitleFor( 'MergeHistory' ),
 468                                 $this->message['revertmerge'],
 469                                 array(),
 470                                 array(
 471                                         'target' => $paramArray[0],
 472                                         'dest' => $title->getPrefixedDBkey(),
 473                                         'mergepoint' => $paramArray[1]
 474                                 ),
 475                                 array( 'known', 'noclasses' )
 476                         ) . ')';
 477                 // If an edit was hidden from a page give a review link to the history
 478                 } else if( self::typeAction( $row, array( 'delete', 'suppress' ), 'revision', 'deletedhistory' ) ) {
 479                         $revert = RevisionDeleter::getLogLinks( $title, $paramArray,
 480                                                                 $this->skin, $this->message );
 481                 // Hidden log items, give review link
 482                 } else if( self::typeAction( $row, array( 'delete', 'suppress' ), 'event', 'deletedhistory' ) ) {
 483                         if( count($paramArray) >= 1 ) {
 484                                 $revdel = SpecialPage::getTitleFor( 'Revisiondelete' );
 485                                 // $paramArray[1] is a CSV of the IDs
 486                                 $query = $paramArray[0];
 487                                 // Link to each hidden object ID, $paramArray[1] is the url param
 488                                 $revert = '(' . $this->skin->link(
 489                                         $revdel,
 490                                         $this->message['revdel-restore'],
 491                                         array(),
 492                                         array(
 493                                                 'target' => $title->getPrefixedText(),
 494                                                 'type' => 'logging',
 495                                                 'ids' => $query
 496                                         ),
 497                                         array( 'known', 'noclasses' )
 498                                 ) . ')';
 499                         }
 500                 // Self-created users
 501                 } else if( self::typeAction( $row, 'newusers', 'create2' ) ) {
 502                         if( isset( $paramArray[0] ) ) {
 503                                 $revert = $this->skin->userToolLinks( $paramArray[0], $title->getDBkey(), true );
 504                         } else {
 505                                 # Fall back to a blue contributions link
 506                                 $revert = $this->skin->userToolLinks( 1, $title->getDBkey() );
 507                         }
 508                         $ts = wfTimestamp( TS_UNIX, $row->log_timestamp );
 509                         if( $ts < '20080129000000' ) {
 510                                 # Suppress $comment from old entries (before 2008-01-29),
 511                                 # not needed and can contain incorrect links
 512                                 $comment = '';
 513                         }
 514                 // Do nothing. The implementation is handled by the hook modifiying the passed-by-ref parameters.
 515                 } else {
 516                         wfRunHooks( 'LogLine', array( $row->log_type, $row->log_action, $title, $paramArray,
 517                                 &$comment, &$revert, $row->log_timestamp ) );
 518                 }
 519                 if( $revert != '' ) {
 520                         $revert = '<span class="mw-logevent-actionlink">' . $revert . '</span>';
 521                 }
 522                 return $revert;
 523         }
 524
 525         /**
 526          * @param $row Row
 527          * @return string
 528          */
 529         private function getShowHideLinks( $row ) {
 530                 global $wgUser;
 531                 if( ( $this->flags & self::NO_ACTION_LINK ) // we don't want to see the links
 532                         || $row->log_type == 'suppress' ) { // no one can hide items from the suppress log
 533                         return '';
 534                 }
 535                 $del = '';
 536                 // Don't show useless link to people who cannot hide revisions
 537                 if( $wgUser->isAllowed( 'deletedhistory' ) ) {
 538                         if( $row->log_deleted || $wgUser->isAllowed( 'deleterevision' ) ) {
 539                                 $canHide = $wgUser->isAllowed( 'deleterevision' );
 540                                 // If event was hidden from sysops
 541                                 if( !self::userCan( $row, LogPage::DELETED_RESTRICTED ) ) {
 542                                         $del = $this->skin->revDeleteLinkDisabled( $canHide );
 543                                 } else {
 544                                         $target = SpecialPage::getTitleFor( 'Log', $row->log_type );
 545                                         $query = array(
 546                                                 'target' => $target->getPrefixedDBkey(),
 547                                                 'type'   => 'logging',
 548                                                 'ids'    => $row->log_id,
 549                                         );
 550                                         $del = $this->skin->revDeleteLink( $query,
 551                                                 self::isDeleted( $row, LogPage::DELETED_RESTRICTED ), $canHide );
 552                                 }
 553                         }
 554                 }
 555                 return $del;
 556         }
 557
 558         /**
 559          * @param $row Row
 560          * @param $type Mixed: string/array
 561          * @param $action Mixed: string/array
 562          * @param $right string
 563          * @return Boolean
 564          */
 565         public static function typeAction( $row, $type, $action, $right='' ) {
 566                 $match = is_array($type) ?
 567                         in_array( $row->log_type, $type ) : $row->log_type == $type;
 568                 if( $match ) {
 569                         $match = is_array( $action ) ?
 570                                 in_array( $row->log_action, $action ) : $row->log_action == $action;
 571                         if( $match && $right ) {
 572                                 global $wgUser;
 573                                 $match = $wgUser->isAllowed( $right );
 574                         }
 575                 }
 576                 return $match;
 577         }
 578
 579         /**
 580          * Determine if the current user is allowed to view a particular
 581          * field of this log row, if it's marked as deleted.
 582          *
 583          * @param $row Row
 584          * @param $field Integer
 585          * @return Boolean
 586          */
 587         public static function userCan( $row, $field ) {
 588                 return self::userCanBitfield( $row->log_deleted, $field );
 589         }
 590
 591         /**
 592          * Determine if the current user is allowed to view a particular
 593          * field of this log row, if it's marked as deleted.
 594          *
 595          * @param $bitfield Integer (current field)
 596          * @param $field Integer
 597          * @return Boolean
 598          */
 599         public static function userCanBitfield( $bitfield, $field ) {
 600                 if( $bitfield & $field ) {
 601                         global $wgUser;
 602
 603                         if ( $bitfield & LogPage::DELETED_RESTRICTED ) {
 604                                 $permission = 'suppressrevision';
 605                         } else {
 606                                 $permission = 'deletedhistory';
 607                         }
 608                         wfDebug( "Checking for $permission due to $field match on $bitfield\n" );
 609                         return $wgUser->isAllowed( $permission );
 610                 } else {
 611                         return true;
 612                 }
 613         }
 614
 615         /**
 616          * @param $row Row
 617          * @param $field Integer: one of DELETED_* bitfield constants
 618          * @return Boolean
 619          */
 620         public static function isDeleted( $row, $field ) {
 621                 return ( $row->log_deleted & $field ) == $field;
 622         }
 623
 624         /**
 625          * Show log extract. Either with text and a box (set $msgKey) or without (don't set $msgKey)
 626          *
 627          * @param $out OutputPage|String-by-reference
 628          * @param $types String or Array
 629          * @param $page String The page title to show log entries for
 630          * @param $user String The user who made the log entries
 631          * @param $param Associative Array with the following additional options:
 632          * - lim Integer Limit of items to show, default is 50
 633          * - conds Array Extra conditions for the query (e.g. "log_action != 'revision'")
 634          * - showIfEmpty boolean Set to false if you don't want any output in case the loglist is empty
 635          *   if set to true (default), "No matching items in log" is displayed if loglist is empty
 636          * - msgKey Array If you want a nice box with a message, set this to the key of the message.
 637          *   First element is the message key, additional optional elements are parameters for the key
 638          *   that are processed with wgMsgExt and option 'parse'
 639          * - offset Set to overwrite offset parameter in $wgRequest
 640          *   set to '' to unset offset
 641          * - wrap String Wrap the message in html (usually something like "<div ...>$1</div>").
 642          * - flags Integer display flags (NO_ACTION_LINK,NO_EXTRA_USER_LINKS)
 643          * @return Integer Number of total log items (not limited by $lim)
 644          */
 645         public static function showLogExtract(
 646                 &$out, $types=array(), $page='', $user='', $param = array()
 647         ) {
 648                 global $wgUser, $wgOut;
 649                 $defaultParameters = array(
 650                         'lim' => 25,
 651                         'conds' => array(),
 652                         'showIfEmpty' => true,
 653                         'msgKey' => array(''),
 654                         'wrap' => "$1",
 655                         'flags' => 0
 656                 );
 657                 # The + operator appends elements of remaining keys from the right
 658                 # handed array to the left handed, whereas duplicated keys are NOT overwritten.
 659                 $param += $defaultParameters;
 660                 # Convert $param array to individual variables
 661                 $lim = $param['lim'];
 662                 $conds = $param['conds'];
 663                 $showIfEmpty = $param['showIfEmpty'];
 664                 $msgKey = $param['msgKey'];
 665                 $wrap = $param['wrap'];
 666                 $flags = $param['flags'];
 667                 if ( !is_array( $msgKey ) ) {
 668                         $msgKey = array( $msgKey );
 669                 }
 670                 # Insert list of top 50 (or top $lim) items
 671                 $loglist = new LogEventsList( $wgUser->getSkin(), $wgOut, $flags );
 672                 $pager = new LogPager( $loglist, $types, $user, $page, '', $conds );
 673                 if ( isset( $param['offset'] ) ) { # Tell pager to ignore $wgRequest offset
 674                         $pager->setOffset( $param['offset'] );
 675                 }
 676                 if( $lim > 0 ) $pager->mLimit = $lim;
 677                 $logBody = $pager->getBody();
 678                 $s = '';
 679                 if( $logBody ) {
 680                         if ( $msgKey[0] ) {
 681                                 $s = '<div class="mw-warning-with-logexcerpt">';
 682
 683                                 if ( count( $msgKey ) == 1 ) {
 684                                         $s .= wfMsgExt( $msgKey[0], array( 'parse' ) );
 685                                 } else { // Process additional arguments
 686                                         $args = $msgKey;
 687                                         array_shift( $args );
 688                                         $s .= wfMsgExt( $msgKey[0], array( 'parse' ), $args );
 689                                 }
 690                         }
 691                         $s .= $loglist->beginLogEventsList() .
 692                                  $logBody .
 693                                  $loglist->endLogEventsList();
 694                 } else {
 695                         if ( $showIfEmpty )
 696                                 $s = Html::rawElement( 'div', array( 'class' => 'mw-warning-logempty' ),
 697                                         wfMsgExt( 'logempty', array( 'parseinline' ) ) );
 698                 }
 699                 if( $pager->getNumRows() > $pager->mLimit ) { # Show "Full log" link
 700                         $urlParam = array();
 701                         if ( $page != '')
 702                                 $urlParam['page'] = $page;
 703                         if ( $user != '')
 704                                 $urlParam['user'] = $user;
 705                         if ( !is_array( $types ) ) # Make it an array, if it isn't
 706                                 $types = array( $types );
 707                         # If there is exactly one log type, we can link to Special:Log?type=foo
 708                         if ( count( $types ) == 1 )
 709                                 $urlParam['type'] = $types[0];
 710                         $s .= $wgUser->getSkin()->link(
 711                                 SpecialPage::getTitleFor( 'Log' ),
 712                                 wfMsgHtml( 'log-fulllog' ),
 713                                 array(),
 714                                 $urlParam
 715                         );
 716                 }
 717                 if ( $logBody && $msgKey[0] ) {
 718                         $s .= '</div>';
 719                 }
 720
 721                 if ( $wrap!='' ) { // Wrap message in html
 722                         $s = str_replace( '$1', $s, $wrap );
 723                 }
 724
 725                 // $out can be either an OutputPage object or a String-by-reference
 726                 if( $out instanceof OutputPage ){
 727                         $out->addHTML( $s );
 728                 } else {
 729                         $out = $s;
 730                 }
 731                 return $pager->getNumRows();
 732         }
 733
 734         /**
 735          * SQL clause to skip forbidden log types for this user
 736          *
 737          * @param $db Database
 738          * @param $audience string, public/user
 739          * @return Mixed: string or false
 740          */
 741         public static function getExcludeClause( $db, $audience = 'public' ) {
 742                 global $wgLogRestrictions, $wgUser;
 743                 // Reset the array, clears extra "where" clauses when $par is used
 744                 $hiddenLogs = array();
 745                 // Don't show private logs to unprivileged users
 746                 foreach( $wgLogRestrictions as $logType => $right ) {
 747                         if( $audience == 'public' || !$wgUser->isAllowed($right) ) {
 748                                 $safeType = $db->strencode( $logType );
 749                                 $hiddenLogs[] = $safeType;
 750                         }
 751                 }
 752                 if( count($hiddenLogs) == 1 ) {
 753                         return 'log_type != ' . $db->addQuotes( $hiddenLogs[0] );
 754                 } elseif( $hiddenLogs ) {
 755                         return 'log_type NOT IN (' . $db->makeList($hiddenLogs) . ')';
 756                 }
 757                 return false;
 758         }
 759 }
 760
 761 /**
 762  * @ingroup Pager
 763  */
 764 class LogPager extends ReverseChronologicalPager {
 765         private $types = array(), $user = '', $title = '', $pattern = '';
 766         private $typeCGI = '';
 767         public $mLogEventsList;
 768
 769         /**
 770          * Constructor
 771          *
 772          * @param $list LogEventsList
 773          * @param $types String or Array: log types to show
 774          * @param $user String: the user who made the log entries
 775          * @param $title String: the page title the log entries are for
 776          * @param $pattern String: do a prefix search rather than an exact title match
 777          * @param $conds Array: extra conditions for the query
 778          * @param $year Integer: the year to start from
 779          * @param $month Integer: the month to start from
 780          * @param $tagFilter String: tag
 781          */
 782         public function __construct( $list, $types = array(), $user = '', $title = '', $pattern = '',
 783                 $conds = array(), $year = false, $month = false, $tagFilter = '' ) {
 784                 parent::__construct();
 785                 $this->mConds = $conds;
 786
 787                 $this->mLogEventsList = $list;
 788
 789                 $this->limitType( $types ); // also excludes hidden types
 790                 $this->limitUser( $user );
 791                 $this->limitTitle( $title, $pattern );
 792                 $this->getDateCond( $year, $month );
 793                 $this->mTagFilter = $tagFilter;
 794         }
 795
 796         public function getDefaultQuery() {
 797                 $query = parent::getDefaultQuery();
 798                 $query['type'] = $this->typeCGI; // arrays won't work here
 799                 $query['user'] = $this->user;
 800                 $query['month'] = $this->mMonth;
 801                 $query['year'] = $this->mYear;
 802                 return $query;
 803         }
 804
 805         // Call ONLY after calling $this->limitType() already!
 806         public function getFilterParams() {
 807                 global $wgFilterLogTypes, $wgUser, $wgRequest;
 808                 $filters = array();
 809                 if( count($this->types) ) {
 810                         return $filters;
 811                 }
 812                 foreach( $wgFilterLogTypes as $type => $default ) {
 813                         // Avoid silly filtering
 814                         if( $type !== 'patrol' || $wgUser->useNPPatrol() ) {
 815                                 $hide = $wgRequest->getInt( "hide_{$type}_log", $default );
 816                                 $filters[$type] = $hide;
 817                                 if( $hide )
 818                                         $this->mConds[] = 'log_type != ' . $this->mDb->addQuotes( $type );
 819                         }
 820                 }
 821                 return $filters;
 822         }
 823
 824         /**
 825          * Set the log reader to return only entries of the given type.
 826          * Type restrictions enforced here
 827          *
 828          * @param $types String or array: Log types ('upload', 'delete', etc);
 829          *   empty string means no restriction
 830          */
 831         private function limitType( $types ) {
 832                 global $wgLogRestrictions, $wgUser;
 833                 // If $types is not an array, make it an array
 834                 $types = ($types === '') ? array() : (array)$types;
 835                 // Don't even show header for private logs; don't recognize it...
 836                 foreach ( $types as $type ) {
 837                         if( isset( $wgLogRestrictions[$type] )
 838                                 && !$wgUser->isAllowed($wgLogRestrictions[$type])
 839                         ) {
 840                                 $types = array_diff( $types, array( $type ) );
 841                         }
 842                 }
 843                 $this->types = $types;
 844                 // Don't show private logs to unprivileged users.
 845                 // Also, only show them upon specific request to avoid suprises.
 846                 $audience = $types ? 'user' : 'public';
 847                 $hideLogs = LogEventsList::getExcludeClause( $this->mDb, $audience );
 848                 if( $hideLogs !== false ) {
 849                         $this->mConds[] = $hideLogs;
 850                 }
 851                 if( count($types) ) {
 852                         $this->mConds['log_type'] = $types;
 853                         // Set typeCGI; used in url param for paging
 854                         if( count($types) == 1 ) $this->typeCGI = $types[0];
 855                 }
 856         }
 857
 858         /**
 859          * Set the log reader to return only entries by the given user.
 860          *
 861          * @param $name String: (In)valid user name
 862          */
 863         private function limitUser( $name ) {
 864                 if( $name == '' ) {
 865                         return false;
 866                 }
 867                 $usertitle = Title::makeTitleSafe( NS_USER, $name );
 868                 if( is_null($usertitle) ) {
 869                         return false;
 870                 }
 871                 /* Fetch userid at first, if known, provides awesome query plan afterwards */
 872                 $userid = User::idFromName( $name );
 873                 if( !$userid ) {
 874                         /* It should be nicer to abort query at all,
 875                            but for now it won't pass anywhere behind the optimizer */
 876                         $this->mConds[] = "NULL";
 877                 } else {
 878                         global $wgUser;
 879                         $this->mConds['log_user'] = $userid;
 880                         // Paranoia: avoid brute force searches (bug 17342)
 881                         if( !$wgUser->isAllowed( 'deletedhistory' ) ) {
 882                                 $this->mConds[] = $this->mDb->bitAnd('log_deleted', LogPage::DELETED_USER) . ' = 0';
 883                         } else if( !$wgUser->isAllowed( 'suppressrevision' ) ) {
 884                                 $this->mConds[] = $this->mDb->bitAnd('log_deleted', LogPage::SUPPRESSED_USER) .
 885                                         ' != ' . LogPage::SUPPRESSED_USER;
 886                         }
 887                         $this->user = $usertitle->getText();
 888                 }
 889         }
 890
 891         /**
 892          * Set the log reader to return only entries affecting the given page.
 893          * (For the block and rights logs, this is a user page.)
 894          *
 895          * @param $page String: Title name as text
 896          * @param $pattern String
 897          */
 898         private function limitTitle( $page, $pattern ) {
 899                 global $wgMiserMode, $wgUser;
 900
 901                 $title = Title::newFromText( $page );
 902                 if( strlen( $page ) == 0 || !$title instanceof Title ) {
 903                         return false;
 904                 }
 905
 906                 $this->title = $title->getPrefixedText();
 907                 $ns = $title->getNamespace();
 908                 $db = $this->mDb;
 909
 910                 # Using the (log_namespace, log_title, log_timestamp) index with a
 911                 # range scan (LIKE) on the first two parts, instead of simple equality,
 912                 # makes it unusable for sorting.  Sorted retrieval using another index
 913                 # would be possible, but then we might have to scan arbitrarily many
 914                 # nodes of that index. Therefore, we need to avoid this if $wgMiserMode
 915                 # is on.
 916                 #
 917                 # This is not a problem with simple title matches, because then we can
 918                 # use the page_time index.  That should have no more than a few hundred
 919                 # log entries for even the busiest pages, so it can be safely scanned
 920                 # in full to satisfy an impossible condition on user or similar.
 921                 if( $pattern && !$wgMiserMode ) {
 922                         $this->mConds['log_namespace'] = $ns;
 923                         $this->mConds[] = 'log_title ' . $db->buildLike( $title->getDBkey(), $db->anyString() );
 924                         $this->pattern = $pattern;
 925                 } else {
 926                         $this->mConds['log_namespace'] = $ns;
 927                         $this->mConds['log_title'] = $title->getDBkey();
 928                 }
 929                 // Paranoia: avoid brute force searches (bug 17342)
 930                 if( !$wgUser->isAllowed( 'deletedhistory' ) ) {
 931                         $this->mConds[] = $db->bitAnd('log_deleted', LogPage::DELETED_ACTION) . ' = 0';
 932                 } else if( !$wgUser->isAllowed( 'suppressrevision' ) ) {
 933                         $this->mConds[] = $db->bitAnd('log_deleted', LogPage::SUPPRESSED_ACTION) .
 934                                 ' != ' . LogPage::SUPPRESSED_ACTION;
 935                 }
 936         }
 937
 938         public function getQueryInfo() {
 939                 $tables = array( 'logging', 'user' );
 940                 $this->mConds[] = 'user_id = log_user';
 941                 $index = array();
 942                 $options = array();
 943                 # Add log_search table if there are conditions on it.
 944                 # This filters the results to only include log rows that have
 945                 # log_search records with the specified ls_field and ls_value values.
 946                 if( array_key_exists( 'ls_field', $this->mConds ) ) {
 947                         $tables[] = 'log_search';
 948                         $index['log_search'] = 'ls_field_val';
 949                         $index['logging'] = 'PRIMARY';
 950                         if ( !$this->hasEqualsClause( 'ls_field' )
 951                                 || !$this->hasEqualsClause( 'ls_value' ) )
 952                         {
 953                                 # Since (ls_field,ls_value,ls_logid) is unique, if the condition is
 954                                 # to match a specific (ls_field,ls_value) tuple, then there will be
 955                                 # no duplicate log rows. Otherwise, we need to remove the duplicates.
 956                                 $options[] = 'DISTINCT';
 957                         }
 958                 # Avoid usage of the wrong index by limiting
 959                 # the choices of available indexes. This mainly
 960                 # avoids site-breaking filesorts.
 961                 } else if( $this->title || $this->pattern || $this->user ) {
 962                         $index['logging'] = array( 'page_time', 'user_time' );
 963                         if( count($this->types) == 1 ) {
 964                                 $index['logging'][] = 'log_user_type_time';
 965                         }
 966                 } else if( count($this->types) == 1 ) {
 967                         $index['logging'] = 'type_time';
 968                 } else {
 969                         $index['logging'] = 'times';
 970                 }
 971                 $options['USE INDEX'] = $index;
 972                 # Don't show duplicate rows when using log_search
 973                 $info = array(
 974                         'tables'     => $tables,
 975                         'fields'     => array( 'log_type', 'log_action', 'log_user', 'log_namespace',
 976                                 'log_title', 'log_params', 'log_comment', 'log_id', 'log_deleted',
 977                                 'log_timestamp', 'user_name', 'user_editcount' ),
 978                         'conds'      => $this->mConds,
 979                         'options'    => $options,
 980                         'join_conds' => array(
 981                                 'user'           => array( 'INNER JOIN', 'user_id=log_user' ),
 982                                 'log_search' => array( 'INNER JOIN', 'ls_log_id=log_id' )
 983                         )
 984                 );
 985                 # Add ChangeTags filter query
 986                 ChangeTags::modifyDisplayQuery( $info['tables'], $info['fields'], $info['conds'],
 987                         $info['join_conds'], $info['options'], $this->mTagFilter );
 988                 return $info;
 989         }
 990
 991         // Checks if $this->mConds has $field matched to a *single* value
 992         protected function hasEqualsClause( $field ) {
 993                 return (
 994                         array_key_exists( $field, $this->mConds ) &&
 995                         ( !is_array( $this->mConds[$field] ) || count( $this->mConds[$field] ) == 1 )
 996                 );
 997         }
 998
 999         function getIndexField() {
1000                 return 'log_timestamp';
1001         }
1002
1003         public function getStartBody() {
1004                 wfProfileIn( __METHOD__ );
1005                 # Do a link batch query
1006                 if( $this->getNumRows() > 0 ) {
1007                         $lb = new LinkBatch;
1008                         foreach ( $this->mResult as $row ) {
1009                                 $lb->add( $row->log_namespace, $row->log_title );
1010                                 $lb->addObj( Title::makeTitleSafe( NS_USER, $row->user_name ) );
1011                                 $lb->addObj( Title::makeTitleSafe( NS_USER_TALK, $row->user_name ) );
1012                         }
1013                         $lb->execute();
1014                         $this->mResult->seek( 0 );
1015                 }
1016                 wfProfileOut( __METHOD__ );
1017                 return '';
1018         }
1019
1020         public function formatRow( $row ) {
1021                 return $this->mLogEventsList->logLine( $row );
1022         }
1023
1024         public function getType() {
1025                 return $this->types;
1026         }
1027
1028         public function getUser() {
1029                 return $this->user;
1030         }
1031
1032         public function getPage() {
1033                 return $this->title;
1034         }
1035
1036         public function getPattern() {
1037                 return $this->pattern;
1038         }
1039
1040         public function getYear() {
1041                 return $this->mYear;
1042         }
1043
1044         public function getMonth() {
1045                 return $this->mMonth;
1046         }
1047
1048         public function getTagFilter() {
1049                 return $this->mTagFilter;
1050         }
1051
1052         public function doQuery() {
1053                 // Workaround MySQL optimizer bug
1054                 $this->mDb->setBigSelects();
1055                 parent::doQuery();
1056                 $this->mDb->setBigSelects( 'default' );
1057         }
1058 }
1059