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                 if( self::isDeleted( $row, LogPage::DELETED_COMMENT ) ) {
 368                         $comment = '<span class="history-deleted">' .
 369                                 wfMsgHtml( 'rev-deleted-comment' ) . '</span>';
 370                 } else {
 371                         $comment = wfUILang()->getDirMark() .
 372                                 $this->skin->commentBlock( $row->log_comment );
 373                 }
 374                 return $comment;
 375         }
 376
 377         /**
 378          * @TODO: split up!
 379          *
 380          * @param  $row
 381          * @param Title $title
 382          * @param Array $paramArray
 383          * @param  $comment
 384          * @return String
 385          */
 386         private function logActionLinks( $row, $title, $paramArray, &$comment ) {
 387                 global $wgUser;
 388                 if( ( $this->flags & self::NO_ACTION_LINK ) // we don't want to see the action
 389                         || self::isDeleted( $row, LogPage::DELETED_ACTION ) ) // action is hidden
 390                 {
 391                         return '';
 392                 }
 393                 $revert = '';
 394                 if( self::typeAction( $row, 'move', 'move', 'move' ) && !empty( $paramArray[0] ) ) {
 395                         $destTitle = Title::newFromText( $paramArray[0] );
 396                         if( $destTitle ) {
 397                                 $revert = '(' . $this->skin->link(
 398                                         SpecialPage::getTitleFor( 'Movepage' ),
 399                                         $this->message['revertmove'],
 400                                         array(),
 401                                         array(
 402                                                 'wpOldTitle' => $destTitle->getPrefixedDBkey(),
 403                                                 'wpNewTitle' => $title->getPrefixedDBkey(),
 404                                                 'wpReason'   => wfMsgForContent( 'revertmove' ),
 405                                                 'wpMovetalk' => 0
 406                                         ),
 407                                         array( 'known', 'noclasses' )
 408                                 ) . ')';
 409                         }
 410                 // Show undelete link
 411                 } elseif( self::typeAction( $row, array( 'delete', 'suppress' ), 'delete', 'deletedhistory' ) ) {
 412                         if( !$wgUser->isAllowed( 'undelete' ) ) {
 413                                 $viewdeleted = $this->message['undeleteviewlink'];
 414                         } else {
 415                                 $viewdeleted = $this->message['undeletelink'];
 416                         }
 417                         $revert = '(' . $this->skin->link(
 418                                 SpecialPage::getTitleFor( 'Undelete' ),
 419                                 $viewdeleted,
 420                                 array(),
 421                                 array( 'target' => $title->getPrefixedDBkey() ),
 422                                 array( 'known', 'noclasses' )
 423                          ) . ')';
 424                 // Show unblock/change block link
 425                 } elseif( self::typeAction( $row, array( 'block', 'suppress' ), array( 'block', 'reblock' ), 'block' ) ) {
 426                         $revert = '(' .
 427                                 $this->skin->link(
 428                                         SpecialPage::getTitleFor( 'Unblock', $row->log_title ),
 429                                         $this->message['unblocklink'],
 430                                         array(),
 431                                         array(),
 432                                         'known'
 433                                 ) .
 434                                 $this->message['pipe-separator'] .
 435                                 $this->skin->link(
 436                                         SpecialPage::getTitleFor( 'Block', $row->log_title ),
 437                                         $this->message['change-blocklink'],
 438                                         array(),
 439                                         array(),
 440                                         'known'
 441                                 ) .
 442                                 ')';
 443                 // Show change protection link
 444                 } elseif( self::typeAction( $row, 'protect', array( 'modify', 'protect', 'unprotect' ) ) ) {
 445                         $revert .= ' (' .
 446                                 $this->skin->link( $title,
 447                                         $this->message['hist'],
 448                                         array(),
 449                                         array(
 450                                                 'action' => 'history',
 451                                                 'offset' => $row->log_timestamp
 452                                         )
 453                                 );
 454                         if( $wgUser->isAllowed( 'protect' ) ) {
 455                                 $revert .= $this->message['pipe-separator'] .
 456                                         $this->skin->link( $title,
 457                                                 $this->message['protect_change'],
 458                                                 array(),
 459                                                 array( 'action' => 'protect' ),
 460                                                 'known' );
 461                         }
 462                         $revert .= ')';
 463                 // Show unmerge link
 464                 } elseif( self::typeAction( $row, 'merge', 'merge', 'mergehistory' ) ) {
 465                         $revert = '(' . $this->skin->link(
 466                                 SpecialPage::getTitleFor( 'MergeHistory' ),
 467                                 $this->message['revertmerge'],
 468                                 array(),
 469                                 array(
 470                                         'target' => $paramArray[0],
 471                                         'dest' => $title->getPrefixedDBkey(),
 472                                         'mergepoint' => $paramArray[1]
 473                                 ),
 474                                 array( 'known', 'noclasses' )
 475                         ) . ')';
 476                 // If an edit was hidden from a page give a review link to the history
 477                 } elseif( self::typeAction( $row, array( 'delete', 'suppress' ), 'revision', 'deletedhistory' ) ) {
 478                         $revert = RevisionDeleter::getLogLinks( $title, $paramArray,
 479                                                                 $this->skin, $this->message );
 480                 // Hidden log items, give review link
 481                 } elseif( self::typeAction( $row, array( 'delete', 'suppress' ), 'event', 'deletedhistory' ) ) {
 482                         if( count($paramArray) >= 1 ) {
 483                                 $revdel = SpecialPage::getTitleFor( 'Revisiondelete' );
 484                                 // $paramArray[1] is a CSV of the IDs
 485                                 $query = $paramArray[0];
 486                                 // Link to each hidden object ID, $paramArray[1] is the url param
 487                                 $revert = '(' . $this->skin->link(
 488                                         $revdel,
 489                                         $this->message['revdel-restore'],
 490                                         array(),
 491                                         array(
 492                                                 'target' => $title->getPrefixedText(),
 493                                                 'type' => 'logging',
 494                                                 'ids' => $query
 495                                         ),
 496                                         array( 'known', 'noclasses' )
 497                                 ) . ')';
 498                         }
 499                 // Self-created users
 500                 } elseif( self::typeAction( $row, 'newusers', 'create2' ) ) {
 501                         if( isset( $paramArray[0] ) ) {
 502                                 $revert = $this->skin->userToolLinks( $paramArray[0], $title->getDBkey(), true );
 503                         } else {
 504                                 # Fall back to a blue contributions link
 505                                 $revert = $this->skin->userToolLinks( 1, $title->getDBkey() );
 506                         }
 507                         if( wfTimestamp( TS_MW, $row->log_timestamp ) < '20080129000000' ) {
 508                                 # Suppress $comment from old entries (before 2008-01-29),
 509                                 # not needed and can contain incorrect links
 510                                 $comment = '';
 511                         }
 512                 // Do nothing. The implementation is handled by the hook modifiying the passed-by-ref parameters.
 513                 } else {
 514                         wfRunHooks( 'LogLine', array( $row->log_type, $row->log_action, $title, $paramArray,
 515                                 &$comment, &$revert, $row->log_timestamp ) );
 516                 }
 517                 if( $revert != '' ) {
 518                         $revert = '<span class="mw-logevent-actionlink">' . $revert . '</span>';
 519                 }
 520                 return $revert;
 521         }
 522
 523         /**
 524          * @param $row Row
 525          * @return string
 526          */
 527         private function getShowHideLinks( $row ) {
 528                 global $wgUser;
 529                 if( ( $this->flags & self::NO_ACTION_LINK ) // we don't want to see the links
 530                         || $row->log_type == 'suppress' ) { // no one can hide items from the suppress log
 531                         return '';
 532                 }
 533                 $del = '';
 534                 // Don't show useless link to people who cannot hide revisions
 535                 if( $wgUser->isAllowed( 'deletedhistory' ) ) {
 536                         if( $row->log_deleted || $wgUser->isAllowed( 'deleterevision' ) ) {
 537                                 $canHide = $wgUser->isAllowed( 'deleterevision' );
 538                                 // If event was hidden from sysops
 539                                 if( !self::userCan( $row, LogPage::DELETED_RESTRICTED ) ) {
 540                                         $del = $this->skin->revDeleteLinkDisabled( $canHide );
 541                                 } else {
 542                                         $target = SpecialPage::getTitleFor( 'Log', $row->log_type );
 543                                         $query = array(
 544                                                 'target' => $target->getPrefixedDBkey(),
 545                                                 'type'   => 'logging',
 546                                                 'ids'    => $row->log_id,
 547                                         );
 548                                         $del = $this->skin->revDeleteLink( $query,
 549                                                 self::isDeleted( $row, LogPage::DELETED_RESTRICTED ), $canHide );
 550                                 }
 551                         }
 552                 }
 553                 return $del;
 554         }
 555
 556         /**
 557          * @param $row Row
 558          * @param $type Mixed: string/array
 559          * @param $action Mixed: string/array
 560          * @param $right string
 561          * @return Boolean
 562          */
 563         public static function typeAction( $row, $type, $action, $right='' ) {
 564                 $match = is_array($type) ?
 565                         in_array( $row->log_type, $type ) : $row->log_type == $type;
 566                 if( $match ) {
 567                         $match = is_array( $action ) ?
 568                                 in_array( $row->log_action, $action ) : $row->log_action == $action;
 569                         if( $match && $right ) {
 570                                 global $wgUser;
 571                                 $match = $wgUser->isAllowed( $right );
 572                         }
 573                 }
 574                 return $match;
 575         }
 576
 577         /**
 578          * Determine if the current user is allowed to view a particular
 579          * field of this log row, if it's marked as deleted.
 580          *
 581          * @param $row Row
 582          * @param $field Integer
 583          * @return Boolean
 584          */
 585         public static function userCan( $row, $field ) {
 586                 return self::userCanBitfield( $row->log_deleted, $field );
 587         }
 588
 589         /**
 590          * Determine if the current user is allowed to view a particular
 591          * field of this log row, if it's marked as deleted.
 592          *
 593          * @param $bitfield Integer (current field)
 594          * @param $field Integer
 595          * @return Boolean
 596          */
 597         public static function userCanBitfield( $bitfield, $field ) {
 598                 if( $bitfield & $field ) {
 599                         global $wgUser;
 600
 601                         if ( $bitfield & LogPage::DELETED_RESTRICTED ) {
 602                                 $permission = 'suppressrevision';
 603                         } else {
 604                                 $permission = 'deletedhistory';
 605                         }
 606                         wfDebug( "Checking for $permission due to $field match on $bitfield\n" );
 607                         return $wgUser->isAllowed( $permission );
 608                 } else {
 609                         return true;
 610                 }
 611         }
 612
 613         /**
 614          * @param $row Row
 615          * @param $field Integer: one of DELETED_* bitfield constants
 616          * @return Boolean
 617          */
 618         public static function isDeleted( $row, $field ) {
 619                 return ( $row->log_deleted & $field ) == $field;
 620         }
 621
 622         /**
 623          * Show log extract. Either with text and a box (set $msgKey) or without (don't set $msgKey)
 624          *
 625          * @param $out OutputPage|String-by-reference
 626          * @param $types String or Array
 627          * @param $page String The page title to show log entries for
 628          * @param $user String The user who made the log entries
 629          * @param $param Associative Array with the following additional options:
 630          * - lim Integer Limit of items to show, default is 50
 631          * - conds Array Extra conditions for the query (e.g. "log_action != 'revision'")
 632          * - showIfEmpty boolean Set to false if you don't want any output in case the loglist is empty
 633          *   if set to true (default), "No matching items in log" is displayed if loglist is empty
 634          * - msgKey Array If you want a nice box with a message, set this to the key of the message.
 635          *   First element is the message key, additional optional elements are parameters for the key
 636          *   that are processed with wgMsgExt and option 'parse'
 637          * - offset Set to overwrite offset parameter in $wgRequest
 638          *   set to '' to unset offset
 639          * - wrap String Wrap the message in html (usually something like "<div ...>$1</div>").
 640          * - flags Integer display flags (NO_ACTION_LINK,NO_EXTRA_USER_LINKS)
 641          * @return Integer Number of total log items (not limited by $lim)
 642          */
 643         public static function showLogExtract(
 644                 &$out, $types=array(), $page='', $user='', $param = array()
 645         ) {
 646                 global $wgUser, $wgOut;
 647                 $defaultParameters = array(
 648                         'lim' => 25,
 649                         'conds' => array(),
 650                         'showIfEmpty' => true,
 651                         'msgKey' => array(''),
 652                         'wrap' => "$1",
 653                         'flags' => 0
 654                 );
 655                 # The + operator appends elements of remaining keys from the right
 656                 # handed array to the left handed, whereas duplicated keys are NOT overwritten.
 657                 $param += $defaultParameters;
 658                 # Convert $param array to individual variables
 659                 $lim = $param['lim'];
 660                 $conds = $param['conds'];
 661                 $showIfEmpty = $param['showIfEmpty'];
 662                 $msgKey = $param['msgKey'];
 663                 $wrap = $param['wrap'];
 664                 $flags = $param['flags'];
 665                 if ( !is_array( $msgKey ) ) {
 666                         $msgKey = array( $msgKey );
 667                 }
 668                 # Insert list of top 50 (or top $lim) items
 669                 $loglist = new LogEventsList( $wgUser->getSkin(), $wgOut, $flags );
 670                 $pager = new LogPager( $loglist, $types, $user, $page, '', $conds );
 671                 if ( isset( $param['offset'] ) ) { # Tell pager to ignore $wgRequest offset
 672                         $pager->setOffset( $param['offset'] );
 673                 }
 674                 if( $lim > 0 ) $pager->mLimit = $lim;
 675                 $logBody = $pager->getBody();
 676                 $s = '';
 677                 if( $logBody ) {
 678                         if ( $msgKey[0] ) {
 679                                 $s = '<div class="mw-warning-with-logexcerpt">';
 680
 681                                 if ( count( $msgKey ) == 1 ) {
 682                                         $s .= wfMsgExt( $msgKey[0], array( 'parse' ) );
 683                                 } else { // Process additional arguments
 684                                         $args = $msgKey;
 685                                         array_shift( $args );
 686                                         $s .= wfMsgExt( $msgKey[0], array( 'parse' ), $args );
 687                                 }
 688                         }
 689                         $s .= $loglist->beginLogEventsList() .
 690                                  $logBody .
 691                                  $loglist->endLogEventsList();
 692                 } else {
 693                         if ( $showIfEmpty )
 694                                 $s = Html::rawElement( 'div', array( 'class' => 'mw-warning-logempty' ),
 695                                         wfMsgExt( 'logempty', array( 'parseinline' ) ) );
 696                 }
 697                 if( $pager->getNumRows() > $pager->mLimit ) { # Show "Full log" link
 698                         $urlParam = array();
 699                         if ( $page != '')
 700                                 $urlParam['page'] = $page;
 701                         if ( $user != '')
 702                                 $urlParam['user'] = $user;
 703                         if ( !is_array( $types ) ) # Make it an array, if it isn't
 704                                 $types = array( $types );
 705                         # If there is exactly one log type, we can link to Special:Log?type=foo
 706                         if ( count( $types ) == 1 )
 707                                 $urlParam['type'] = $types[0];
 708                         $s .= $wgUser->getSkin()->link(
 709                                 SpecialPage::getTitleFor( 'Log' ),
 710                                 wfMsgHtml( 'log-fulllog' ),
 711                                 array(),
 712                                 $urlParam
 713                         );
 714                 }
 715                 if ( $logBody && $msgKey[0] ) {
 716                         $s .= '</div>';
 717                 }
 718
 719                 if ( $wrap!='' ) { // Wrap message in html
 720                         $s = str_replace( '$1', $s, $wrap );
 721                 }
 722
 723                 // $out can be either an OutputPage object or a String-by-reference
 724                 if( $out instanceof OutputPage ){
 725                         $out->addHTML( $s );
 726                 } else {
 727                         $out = $s;
 728                 }
 729                 return $pager->getNumRows();
 730         }
 731
 732         /**
 733          * SQL clause to skip forbidden log types for this user
 734          *
 735          * @param $db Database
 736          * @param $audience string, public/user
 737          * @return Mixed: string or false
 738          */
 739         public static function getExcludeClause( $db, $audience = 'public' ) {
 740                 global $wgLogRestrictions, $wgUser;
 741                 // Reset the array, clears extra "where" clauses when $par is used
 742                 $hiddenLogs = array();
 743                 // Don't show private logs to unprivileged users
 744                 foreach( $wgLogRestrictions as $logType => $right ) {
 745                         if( $audience == 'public' || !$wgUser->isAllowed($right) ) {
 746                                 $safeType = $db->strencode( $logType );
 747                                 $hiddenLogs[] = $safeType;
 748                         }
 749                 }
 750                 if( count($hiddenLogs) == 1 ) {
 751                         return 'log_type != ' . $db->addQuotes( $hiddenLogs[0] );
 752                 } elseif( $hiddenLogs ) {
 753                         return 'log_type NOT IN (' . $db->makeList($hiddenLogs) . ')';
 754                 }
 755                 return false;
 756         }
 757 }
 758
 759 /**
 760  * @ingroup Pager
 761  */
 762 class LogPager extends ReverseChronologicalPager {
 763         private $types = array(), $user = '', $title = '', $pattern = '';
 764         private $typeCGI = '';
 765         public $mLogEventsList;
 766
 767         /**
 768          * Constructor
 769          *
 770          * @param $list LogEventsList
 771          * @param $types String or Array: log types to show
 772          * @param $user String: the user who made the log entries
 773          * @param $title String: the page title the log entries are for
 774          * @param $pattern String: do a prefix search rather than an exact title match
 775          * @param $conds Array: extra conditions for the query
 776          * @param $year Integer: the year to start from
 777          * @param $month Integer: the month to start from
 778          * @param $tagFilter String: tag
 779          */
 780         public function __construct( $list, $types = array(), $user = '', $title = '', $pattern = '',
 781                 $conds = array(), $year = false, $month = false, $tagFilter = '' ) {
 782                 parent::__construct();
 783                 $this->mConds = $conds;
 784
 785                 $this->mLogEventsList = $list;
 786
 787                 $this->limitType( $types ); // also excludes hidden types
 788                 $this->limitUser( $user );
 789                 $this->limitTitle( $title, $pattern );
 790                 $this->getDateCond( $year, $month );
 791                 $this->mTagFilter = $tagFilter;
 792         }
 793
 794         public function getDefaultQuery() {
 795                 $query = parent::getDefaultQuery();
 796                 $query['type'] = $this->typeCGI; // arrays won't work here
 797                 $query['user'] = $this->user;
 798                 $query['month'] = $this->mMonth;
 799                 $query['year'] = $this->mYear;
 800                 return $query;
 801         }
 802
 803         // Call ONLY after calling $this->limitType() already!
 804         public function getFilterParams() {
 805                 global $wgFilterLogTypes, $wgUser, $wgRequest;
 806                 $filters = array();
 807                 if( count($this->types) ) {
 808                         return $filters;
 809                 }
 810                 foreach( $wgFilterLogTypes as $type => $default ) {
 811                         // Avoid silly filtering
 812                         if( $type !== 'patrol' || $wgUser->useNPPatrol() ) {
 813                                 $hide = $wgRequest->getInt( "hide_{$type}_log", $default );
 814                                 $filters[$type] = $hide;
 815                                 if( $hide )
 816                                         $this->mConds[] = 'log_type != ' . $this->mDb->addQuotes( $type );
 817                         }
 818                 }
 819                 return $filters;
 820         }
 821
 822         /**
 823          * Set the log reader to return only entries of the given type.
 824          * Type restrictions enforced here
 825          *
 826          * @param $types String or array: Log types ('upload', 'delete', etc);
 827          *   empty string means no restriction
 828          */
 829         private function limitType( $types ) {
 830                 global $wgLogRestrictions, $wgUser;
 831                 // If $types is not an array, make it an array
 832                 $types = ($types === '') ? array() : (array)$types;
 833                 // Don't even show header for private logs; don't recognize it...
 834                 foreach ( $types as $type ) {
 835                         if( isset( $wgLogRestrictions[$type] )
 836                                 && !$wgUser->isAllowed($wgLogRestrictions[$type])
 837                         ) {
 838                                 $types = array_diff( $types, array( $type ) );
 839                         }
 840                 }
 841                 $this->types = $types;
 842                 // Don't show private logs to unprivileged users.
 843                 // Also, only show them upon specific request to avoid suprises.
 844                 $audience = $types ? 'user' : 'public';
 845                 $hideLogs = LogEventsList::getExcludeClause( $this->mDb, $audience );
 846                 if( $hideLogs !== false ) {
 847                         $this->mConds[] = $hideLogs;
 848                 }
 849                 if( count($types) ) {
 850                         $this->mConds['log_type'] = $types;
 851                         // Set typeCGI; used in url param for paging
 852                         if( count($types) == 1 ) $this->typeCGI = $types[0];
 853                 }
 854         }
 855
 856         /**
 857          * Set the log reader to return only entries by the given user.
 858          *
 859          * @param $name String: (In)valid user name
 860          */
 861         private function limitUser( $name ) {
 862                 if( $name == '' ) {
 863                         return false;
 864                 }
 865                 $usertitle = Title::makeTitleSafe( NS_USER, $name );
 866                 if( is_null($usertitle) ) {
 867                         return false;
 868                 }
 869                 /* Fetch userid at first, if known, provides awesome query plan afterwards */
 870                 $userid = User::idFromName( $name );
 871                 if( !$userid ) {
 872                         /* It should be nicer to abort query at all,
 873                            but for now it won't pass anywhere behind the optimizer */
 874                         $this->mConds[] = "NULL";
 875                 } else {
 876                         global $wgUser;
 877                         $this->mConds['log_user'] = $userid;
 878                         // Paranoia: avoid brute force searches (bug 17342)
 879                         if( !$wgUser->isAllowed( 'deletedhistory' ) ) {
 880                                 $this->mConds[] = $this->mDb->bitAnd('log_deleted', LogPage::DELETED_USER) . ' = 0';
 881                         } elseif( !$wgUser->isAllowed( 'suppressrevision' ) ) {
 882                                 $this->mConds[] = $this->mDb->bitAnd('log_deleted', LogPage::SUPPRESSED_USER) .
 883                                         ' != ' . LogPage::SUPPRESSED_USER;
 884                         }
 885                         $this->user = $usertitle->getText();
 886                 }
 887         }
 888
 889         /**
 890          * Set the log reader to return only entries affecting the given page.
 891          * (For the block and rights logs, this is a user page.)
 892          *
 893          * @param $page String: Title name as text
 894          * @param $pattern String
 895          */
 896         private function limitTitle( $page, $pattern ) {
 897                 global $wgMiserMode, $wgUser;
 898
 899                 $title = Title::newFromText( $page );
 900                 if( strlen( $page ) == 0 || !$title instanceof Title ) {
 901                         return false;
 902                 }
 903
 904                 $this->title = $title->getPrefixedText();
 905                 $ns = $title->getNamespace();
 906                 $db = $this->mDb;
 907
 908                 # Using the (log_namespace, log_title, log_timestamp) index with a
 909                 # range scan (LIKE) on the first two parts, instead of simple equality,
 910                 # makes it unusable for sorting.  Sorted retrieval using another index
 911                 # would be possible, but then we might have to scan arbitrarily many
 912                 # nodes of that index. Therefore, we need to avoid this if $wgMiserMode
 913                 # is on.
 914                 #
 915                 # This is not a problem with simple title matches, because then we can
 916                 # use the page_time index.  That should have no more than a few hundred
 917                 # log entries for even the busiest pages, so it can be safely scanned
 918                 # in full to satisfy an impossible condition on user or similar.
 919                 if( $pattern && !$wgMiserMode ) {
 920                         $this->mConds['log_namespace'] = $ns;
 921                         $this->mConds[] = 'log_title ' . $db->buildLike( $title->getDBkey(), $db->anyString() );
 922                         $this->pattern = $pattern;
 923                 } else {
 924                         $this->mConds['log_namespace'] = $ns;
 925                         $this->mConds['log_title'] = $title->getDBkey();
 926                 }
 927                 // Paranoia: avoid brute force searches (bug 17342)
 928                 if( !$wgUser->isAllowed( 'deletedhistory' ) ) {
 929                         $this->mConds[] = $db->bitAnd('log_deleted', LogPage::DELETED_ACTION) . ' = 0';
 930                 } elseif( !$wgUser->isAllowed( 'suppressrevision' ) ) {
 931                         $this->mConds[] = $db->bitAnd('log_deleted', LogPage::SUPPRESSED_ACTION) .
 932                                 ' != ' . LogPage::SUPPRESSED_ACTION;
 933                 }
 934         }
 935
 936         public function getQueryInfo() {
 937                 $tables = array( 'logging', 'user' );
 938                 $this->mConds[] = 'user_id = log_user';
 939                 $index = array();
 940                 $options = array();
 941                 # Add log_search table if there are conditions on it.
 942                 # This filters the results to only include log rows that have
 943                 # log_search records with the specified ls_field and ls_value values.
 944                 if( array_key_exists( 'ls_field', $this->mConds ) ) {
 945                         $tables[] = 'log_search';
 946                         $index['log_search'] = 'ls_field_val';
 947                         $index['logging'] = 'PRIMARY';
 948                         if ( !$this->hasEqualsClause( 'ls_field' )
 949                                 || !$this->hasEqualsClause( 'ls_value' ) )
 950                         {
 951                                 # Since (ls_field,ls_value,ls_logid) is unique, if the condition is
 952                                 # to match a specific (ls_field,ls_value) tuple, then there will be
 953                                 # no duplicate log rows. Otherwise, we need to remove the duplicates.
 954                                 $options[] = 'DISTINCT';
 955                         }
 956                 # Avoid usage of the wrong index by limiting
 957                 # the choices of available indexes. This mainly
 958                 # avoids site-breaking filesorts.
 959                 } elseif( $this->title || $this->pattern || $this->user ) {
 960                         $index['logging'] = array( 'page_time', 'user_time' );
 961                         if( count($this->types) == 1 ) {
 962                                 $index['logging'][] = 'log_user_type_time';
 963                         }
 964                 } elseif( count($this->types) == 1 ) {
 965                         $index['logging'] = 'type_time';
 966                 } else {
 967                         $index['logging'] = 'times';
 968                 }
 969                 $options['USE INDEX'] = $index;
 970                 # Don't show duplicate rows when using log_search
 971                 $info = array(
 972                         'tables'     => $tables,
 973                         'fields'     => array( 'log_type', 'log_action', 'log_user', 'log_namespace',
 974                                 'log_title', 'log_params', 'log_comment', 'log_id', 'log_deleted',
 975                                 'log_timestamp', 'user_name', 'user_editcount' ),
 976                         'conds'      => $this->mConds,
 977                         'options'    => $options,
 978                         'join_conds' => array(
 979                                 'user'           => array( 'INNER JOIN', 'user_id=log_user' ),
 980                                 'log_search' => array( 'INNER JOIN', 'ls_log_id=log_id' )
 981                         )
 982                 );
 983                 # Add ChangeTags filter query
 984                 ChangeTags::modifyDisplayQuery( $info['tables'], $info['fields'], $info['conds'],
 985                         $info['join_conds'], $info['options'], $this->mTagFilter );
 986                 return $info;
 987         }
 988
 989         // Checks if $this->mConds has $field matched to a *single* value
 990         protected function hasEqualsClause( $field ) {
 991                 return (
 992                         array_key_exists( $field, $this->mConds ) &&
 993                         ( !is_array( $this->mConds[$field] ) || count( $this->mConds[$field] ) == 1 )
 994                 );
 995         }
 996
 997         function getIndexField() {
 998                 return 'log_timestamp';
 999         }
1000
1001         public function getStartBody() {
1002                 wfProfileIn( __METHOD__ );
1003                 # Do a link batch query
1004                 if( $this->getNumRows() > 0 ) {
1005                         $lb = new LinkBatch;
1006                         foreach ( $this->mResult as $row ) {
1007                                 $lb->add( $row->log_namespace, $row->log_title );
1008                                 $lb->addObj( Title::makeTitleSafe( NS_USER, $row->user_name ) );
1009                                 $lb->addObj( Title::makeTitleSafe( NS_USER_TALK, $row->user_name ) );
1010                         }
1011                         $lb->execute();
1012                         $this->mResult->seek( 0 );
1013                 }
1014                 wfProfileOut( __METHOD__ );
1015                 return '';
1016         }
1017
1018         public function formatRow( $row ) {
1019                 return $this->mLogEventsList->logLine( $row );
1020         }
1021
1022         public function getType() {
1023                 return $this->types;
1024         }
1025
1026         public function getUser() {
1027                 return $this->user;
1028         }
1029
1030         public function getPage() {
1031                 return $this->title;
1032         }
1033
1034         public function getPattern() {
1035                 return $this->pattern;
1036         }
1037
1038         public function getYear() {
1039                 return $this->mYear;
1040         }
1041
1042         public function getMonth() {
1043                 return $this->mMonth;
1044         }
1045
1046         public function getTagFilter() {
1047                 return $this->mTagFilter;
1048         }
1049
1050         public function doQuery() {
1051                 // Workaround MySQL optimizer bug
1052                 $this->mDb->setBigSelects();
1053                 parent::doQuery();
1054                 $this->mDb->setBigSelects( 'default' );
1055         }
1056 }
1057