includes/specials/SpecialRevisiondelete.php

   1 <?php
   2 /**
   3  * Special page allowing users with the appropriate permissions to view
   4  * and hide revisions. Log items can also be hidden.
   5  *
   6  * @file
   7  * @ingroup SpecialPage
   8  */
   9
  10 class SpecialRevisionDelete extends UnlistedSpecialPage {
  11         /** Skin object */
  12         var $skin;
  13
  14         /** True if the submit button was clicked, and the form was posted */
  15         var $submitClicked;
  16
  17         /** Target ID list */
  18         var $ids;
  19
  20         /** Archive name, for reviewing deleted files */
  21         var $archiveName;
  22
  23         /** Edit token for securing image views against XSS */
  24         var $token;
  25
  26         /** Title object for target parameter */
  27         var $targetObj;
  28
  29         /** Deletion type, may be revision, archive, oldimage, filearchive, logging. */
  30         var $typeName;
  31
  32         /** Array of checkbox specs (message, name, deletion bits) */
  33         var $checks;
  34
  35         /** Information about the current type */
  36         var $typeInfo;
  37
  38         /** The RevDel_List object, storing the list of items to be deleted/undeleted */
  39         var $list;
  40
  41         /**
  42          * Assorted information about each type, needed by the special page.
  43          * TODO Move some of this to the list class
  44          */
  45         static $allowedTypes = array(
  46                 'revision' => array(
  47                         'check-label' => 'revdelete-hide-text',
  48                         'deletion-bits' => Revision::DELETED_TEXT,
  49                         'success' => 'revdelete-success',
  50                         'failure' => 'revdelete-failure',
  51                         'list-class' => 'RevDel_RevisionList',
  52                 ),
  53                 'archive' => array(
  54                         'check-label' => 'revdelete-hide-text',
  55                         'deletion-bits' => Revision::DELETED_TEXT,
  56                         'success' => 'revdelete-success',
  57                         'failure' => 'revdelete-failure',
  58                         'list-class' => 'RevDel_ArchiveList',
  59                 ),
  60                 'oldimage'=> array(
  61                         'check-label' => 'revdelete-hide-image',
  62                         'deletion-bits' => File::DELETED_FILE,
  63                         'success' => 'revdelete-success',
  64                         'failure' => 'revdelete-failure',
  65                         'list-class' => 'RevDel_FileList',
  66                 ),
  67                 'filearchive' => array(
  68                         'check-label' => 'revdelete-hide-image',
  69                         'deletion-bits' => File::DELETED_FILE,
  70                         'success' => 'revdelete-success',
  71                         'failure' => 'revdelete-failure',
  72                         'list-class' => 'RevDel_ArchivedFileList',
  73                 ),
  74                 'logging' => array(
  75                         'check-label' => 'revdelete-hide-name',
  76                         'deletion-bits' => LogPage::DELETED_ACTION,
  77                         'success' => 'logdelete-success',
  78                         'failure' => 'logdelete-failure',
  79                         'list-class' => 'RevDel_LogList',
  80                 ),
  81         );
  82
  83         /** Type map to support old log entries */
  84         static $deprecatedTypeMap = array(
  85                 'oldid' => 'revision',
  86                 'artimestamp' => 'archive',
  87                 'oldimage' => 'oldimage',
  88                 'fileid' => 'filearchive',
  89                 'logid' => 'logging',
  90         );
  91
  92         public function __construct() {
  93                 parent::__construct( 'Revisiondelete', 'deletedhistory' );
  94         }
  95
  96         public function execute( $par ) {
  97                 global $wgOut, $wgUser, $wgRequest;
  98                 if( !$wgUser->isAllowed( 'deletedhistory' ) ) {
  99                         $wgOut->permissionRequired( 'deletedhistory' );
 100                         return;
 101                 } else if( wfReadOnly() ) {
 102                         $wgOut->readOnlyPage();
 103                         return;
 104                 }
 105                 $this->mIsAllowed = $wgUser->isAllowed('deleterevision'); // for changes
 106                 $this->skin = $wgUser->getSkin();
 107                 $this->setHeaders();
 108                 $this->outputHeader();
 109                 $this->submitClicked = $wgRequest->wasPosted() && $wgRequest->getBool( 'wpSubmit' );
 110                 # Handle our many different possible input types.
 111                 $ids = $wgRequest->getVal( 'ids' );
 112                 if ( !is_null( $ids ) ) {
 113                         # Allow CSV, for backwards compatibility, or a single ID for show/hide links
 114                         $this->ids = explode( ',', $ids );
 115                 } else {
 116                         # Array input
 117                         $this->ids = array_keys( $wgRequest->getArray('ids',array()) );
 118                 }
 119                 // $this->ids = array_map( 'intval', $this->ids );
 120                 $this->ids = array_unique( array_filter( $this->ids ) );
 121
 122                 if ( $wgRequest->getVal( 'action' ) == 'historysubmit' ) {
 123                         # For show/hide form submission from history page
 124                         $this->targetObj = $GLOBALS['wgTitle'];
 125                         $this->typeName = 'revision';
 126                 } else {
 127                         $this->typeName = $wgRequest->getVal( 'type' );
 128                         $this->targetObj = Title::newFromText( $wgRequest->getText( 'target' ) );
 129                 }
 130
 131                 # For reviewing deleted files...
 132                 $this->archiveName = $wgRequest->getVal( 'file' );
 133                 $this->token = $wgRequest->getVal( 'token' );
 134                 if ( $this->archiveName && $this->targetObj ) {
 135                         $this->tryShowFile( $this->archiveName );
 136                         return;
 137                 }
 138
 139                 if ( isset( self::$deprecatedTypeMap[$this->typeName] ) ) {
 140                         $this->typeName = self::$deprecatedTypeMap[$this->typeName];
 141                 }
 142
 143                 # No targets?
 144                 if( !isset( self::$allowedTypes[$this->typeName] ) || count( $this->ids ) == 0 ) {
 145                         $wgOut->showErrorPage( 'revdelete-nooldid-title', 'revdelete-nooldid-text' );
 146                         return;
 147                 }
 148                 $this->typeInfo = self::$allowedTypes[$this->typeName];
 149
 150                 # If we have revisions, get the title from the first one
 151                 # since they should all be from the same page. This allows
 152                 # for more flexibility with page moves...
 153                 if( $this->typeName == 'revision' ) {
 154                         $rev = Revision::newFromId( $this->ids[0] );
 155                         $this->targetObj = $rev ? $rev->getTitle() : $this->targetObj;
 156                 }
 157
 158                 $this->otherReason = $wgRequest->getVal( 'wpReason' );
 159                 # We need a target page!
 160                 if( is_null($this->targetObj) ) {
 161                         $wgOut->addWikiMsg( 'undelete-header' );
 162                         return;
 163                 }
 164                 # Give a link to the logs/hist for this page
 165                 $this->showConvenienceLinks();
 166
 167                 # Initialise checkboxes
 168                 $this->checks = array(
 169                         array( $this->typeInfo['check-label'], 'wpHidePrimary', $this->typeInfo['deletion-bits'] ),
 170                         array( 'revdelete-hide-comment', 'wpHideComment', Revision::DELETED_COMMENT ),
 171                         array( 'revdelete-hide-user', 'wpHideUser', Revision::DELETED_USER )
 172                 );
 173                 if( $wgUser->isAllowed('suppressrevision') ) {
 174                         $this->checks[] = array( 'revdelete-hide-restricted',
 175                                 'wpHideRestricted', Revision::DELETED_RESTRICTED );
 176                 }
 177
 178                 # Either submit or create our form
 179                 if( $this->mIsAllowed && $this->submitClicked ) {
 180                         $this->submit( $wgRequest );
 181                 } else {
 182                         $this->showForm();
 183                 }
 184
 185                 $qc = $this->getLogQueryCond();
 186                 # Show relevant lines from the deletion log
 187                 $wgOut->addHTML( "<h2>" . htmlspecialchars( LogPage::logName( 'delete' ) ) . "</h2>\n" );
 188                 LogEventsList::showLogExtract( $wgOut, 'delete',
 189                         $this->targetObj->getPrefixedText(), '', array( 'lim' => 25, 'conds' => $qc ) );
 190                 # Show relevant lines from the suppression log
 191                 if( $wgUser->isAllowed( 'suppressionlog' ) ) {
 192                         $wgOut->addHTML( "<h2>" . htmlspecialchars( LogPage::logName( 'suppress' ) ) . "</h2>\n" );
 193                         LogEventsList::showLogExtract( $wgOut, 'suppress',
 194                                 $this->targetObj->getPrefixedText(), '', array( 'lim' => 25, 'conds' => $qc ) );
 195                 }
 196         }
 197
 198         /**
 199          * Show some useful links in the subtitle
 200          */
 201         protected function showConvenienceLinks() {
 202                 global $wgOut, $wgUser, $wgLang;
 203                 # Give a link to the logs/hist for this page
 204                 if( $this->targetObj ) {
 205                         $links = array();
 206                         $links[] = $this->skin->linkKnown(
 207                                 SpecialPage::getTitleFor( 'Log' ),
 208                                 wfMsgHtml( 'viewpagelogs' ),
 209                                 array(),
 210                                 array( 'page' => $this->targetObj->getPrefixedText() )
 211                         );
 212                         if ( $this->targetObj->getNamespace() != NS_SPECIAL ) {
 213                                 # Give a link to the page history
 214                                 $links[] = $this->skin->linkKnown(
 215                                         $this->targetObj,
 216                                         wfMsgHtml( 'pagehist' ),
 217                                         array(),
 218                                         array( 'action' => 'history' )
 219                                 );
 220                                 # Link to deleted edits
 221                                 if( $wgUser->isAllowed('undelete') ) {
 222                                         $undelete = SpecialPage::getTitleFor( 'Undelete' );
 223                                         $links[] = $this->skin->linkKnown(
 224                                                 $undelete,
 225                                                 wfMsgHtml( 'deletedhist' ),
 226                                                 array(),
 227                                                 array( 'target' => $this->targetObj->getPrefixedDBkey() )
 228                                         );
 229                                 }
 230                         }
 231                         # Logs themselves don't have histories or archived revisions
 232                         $wgOut->setSubtitle( '<p>' . $wgLang->pipeList( $links ) . '</p>' );
 233                 }
 234         }
 235
 236         /**
 237          * Get the condition used for fetching log snippets
 238          */
 239         protected function getLogQueryCond() {
 240                 $conds = array();
 241                 // Revision delete logs for these item
 242                 $conds['log_type'] = array('delete','suppress');
 243                 $conds['log_action'] = $this->getList()->getLogAction();
 244                 $conds['ls_field'] = RevisionDeleter::getRelationType( $this->typeName );
 245                 $conds['ls_value'] = $this->ids;
 246                 return $conds;
 247         }
 248
 249         /**
 250          * Show a deleted file version requested by the visitor.
 251          * TODO Mostly copied from Special:Undelete. Refactor.
 252          */
 253         protected function tryShowFile( $archiveName ) {
 254                 global $wgOut, $wgRequest, $wgUser, $wgLang;
 255
 256                 $repo = RepoGroup::singleton()->getLocalRepo();
 257                 $oimage = $repo->newFromArchiveName( $this->targetObj, $archiveName );
 258                 $oimage->load();
 259                 // Check if user is allowed to see this file
 260                 if ( !$oimage->exists() ) {
 261                         $wgOut->addWikiMsg( 'revdelete-no-file' );
 262                         return;
 263                 }
 264                 if( !$oimage->userCan(File::DELETED_FILE) ) {
 265                         if( $oimage->isDeleted( File::DELETED_RESTRICTED ) ) {
 266                                 $wgOut->permissionRequired( 'suppressrevision' );
 267                         } else {
 268                                 $wgOut->permissionRequired( 'deletedtext' );
 269                         }
 270                         return;
 271                 }
 272                 if ( !$wgUser->matchEditToken( $this->token, $archiveName ) ) {
 273                         $wgOut->addWikiMsg( 'revdelete-show-file-confirm',
 274                                 $this->targetObj->getText(),
 275                                 $wgLang->date( $oimage->getTimestamp() ),
 276                                 $wgLang->time( $oimage->getTimestamp() ) );
 277                         $wgOut->addHTML(
 278                                 Xml::openElement( 'form', array(
 279                                         'method' => 'POST',
 280                                         'action' => $this->getTitle()->getLocalUrl(
 281                                                 'target=' . urlencode( $oimage->getName() ) .
 282                                                 '&file=' . urlencode( $archiveName ) .
 283                                                 '&token=' . urlencode( $wgUser->editToken( $archiveName ) ) )
 284                                         )
 285                                 ) .
 286                                 Xml::submitButton( wfMsg( 'revdelete-show-file-submit' ) ) .
 287                                 '</form>'
 288                         );
 289                         return;
 290                 }
 291                 $wgOut->disable();
 292                 # We mustn't allow the output to be Squid cached, otherwise
 293                 # if an admin previews a deleted image, and it's cached, then
 294                 # a user without appropriate permissions can toddle off and
 295                 # nab the image, and Squid will serve it
 296                 $wgRequest->response()->header( 'Expires: ' . gmdate( 'D, d M Y H:i:s', 0 ) . ' GMT' );
 297                 $wgRequest->response()->header( 'Cache-Control: no-cache, no-store, max-age=0, must-revalidate' );
 298                 $wgRequest->response()->header( 'Pragma: no-cache' );
 299
 300                 # Stream the file to the client
 301                 global $IP;
 302                 require_once( "$IP/includes/StreamFile.php" );
 303                 $key = $oimage->getStorageKey();
 304                 $path = $repo->getZonePath( 'deleted' ) . '/' . $repo->getDeletedHashPath( $key ) . $key;
 305                 wfStreamFile( $path );
 306         }
 307
 308         /**
 309          * Get the list object for this request
 310          */
 311         protected function getList() {
 312                 if ( is_null( $this->list ) ) {
 313                         $class = $this->typeInfo['list-class'];
 314                         $this->list = new $class( $this, $this->targetObj, $this->ids );
 315                 }
 316                 return $this->list;
 317         }
 318
 319         /**
 320          * Show a list of items that we will operate on, and show a form with checkboxes
 321          * which will allow the user to choose new visibility settings.
 322          */
 323         protected function showForm() {
 324                 global $wgOut, $wgUser, $wgLang;
 325                 $UserAllowed = true;
 326
 327                 if ( $this->typeName == 'logging' ) {
 328                         $wgOut->addWikiMsg( 'logdelete-selected', $wgLang->formatNum( count($this->ids) ) );
 329                 } else {
 330                         $wgOut->addWikiMsg( 'revdelete-selected',
 331                                 $this->targetObj->getPrefixedText(), count( $this->ids ) );
 332                 }
 333
 334                 $wgOut->addHTML( "<ul>" );
 335
 336                 $where = $revObjs = array();
 337
 338                 $numRevisions = 0;
 339                 // Live revisions...
 340                 $list = $this->getList();
 341                 for ( $list->reset(); $list->current(); $list->next() ) {
 342                         $item = $list->current();
 343                         if ( !$item->canView() ) {
 344                                 if( !$this->submitClicked ) {
 345                                         $wgOut->permissionRequired( 'suppressrevision' );
 346                                         return;
 347                                 }
 348                                 $UserAllowed = false;
 349                         }
 350                         $numRevisions++;
 351                         $wgOut->addHTML( $item->getHTML() );
 352                 }
 353
 354                 if( !$numRevisions ) {
 355                         $wgOut->showErrorPage( 'revdelete-nooldid-title', 'revdelete-nooldid-text' );
 356                         return;
 357                 }
 358
 359                 $wgOut->addHTML( "</ul>" );
 360                 // Explanation text
 361                 $this->addUsageText();
 362
 363                 // Normal sysops can always see what they did, but can't always change it
 364                 if( !$UserAllowed ) return;
 365
 366                 // Show form if the user can submit
 367                 if( $this->mIsAllowed ) {
 368                         $out = Xml::openElement( 'form', array( 'method' => 'post',
 369                                         'action' => $this->getTitle()->getLocalUrl( array( 'action' => 'submit' ) ),
 370                                         'id' => 'mw-revdel-form-revisions' ) ) .
 371                                 Xml::fieldset( wfMsg( 'revdelete-legend' ) ) .
 372                                 $this->buildCheckBoxes() .
 373                                 Xml::openElement( 'table' ) .
 374                                 "<tr>\n" .
 375                                         '<td class="mw-label">' .
 376                                                 Xml::label( wfMsg( 'revdelete-log' ), 'wpRevDeleteReasonList' ) .
 377                                         '</td>' .
 378                                         '<td class="mw-input">' .
 379                                                 Xml::listDropDown( 'wpRevDeleteReasonList',
 380                                                         wfMsgForContent( 'revdelete-reason-dropdown' ),
 381                                                         wfMsgForContent( 'revdelete-reasonotherlist' ), '', 'wpReasonDropDown', 1
 382                                                 ) .
 383                                         '</td>' .
 384                                 "</tr><tr>\n" .
 385                                         '<td class="mw-label">' .
 386                                                 Xml::label( wfMsg( 'revdelete-otherreason' ), 'wpReason' ) .
 387                                         '</td>' .
 388                                         '<td class="mw-input">' .
 389                                                 Xml::input( 'wpReason', 60, $this->otherReason, array( 'id' => 'wpReason' ) ) .
 390                                         '</td>' .
 391                                 "</tr><tr>\n" .
 392                                         '<td></td>' .
 393                                         '<td class="mw-submit">' .
 394                                                 Xml::submitButton( wfMsgExt('revdelete-submit','parsemag',$numRevisions),
 395                                                         array( 'name' => 'wpSubmit' ) ) .
 396                                         '</td>' .
 397                                 "</tr>\n" .
 398                                 Xml::closeElement( 'table' ) .
 399                                 Xml::hidden( 'wpEditToken', $wgUser->editToken() ) .
 400                                 Xml::hidden( 'target', $this->targetObj->getPrefixedText() ) .
 401                                 Xml::hidden( 'type', $this->typeName ) .
 402                                 Xml::hidden( 'ids', implode( ',', $this->ids ) ) .
 403                                 Xml::closeElement( 'fieldset' ) . "\n";
 404                 } else {
 405                         $out = '';
 406                 }
 407                 if( $this->mIsAllowed ) {
 408                         $out .= Xml::closeElement( 'form' ) . "\n";
 409                         // Show link to edit the dropdown reasons
 410                         if( $wgUser->isAllowed( 'editinterface' ) ) {
 411                                 $title = Title::makeTitle( NS_MEDIAWIKI, 'revdelete-reason-dropdown' );
 412                                 $link = $wgUser->getSkin()->link(
 413                                         $title,
 414                                         wfMsgHtml( 'revdelete-edit-reasonlist' ),
 415                                         array(),
 416                                         array( 'action' => 'edit' )
 417                                 );
 418                                 $out .= Xml::tags( 'p', array( 'class' => 'mw-revdel-editreasons' ), $link ) . "\n";
 419                         }
 420                 }
 421                 $wgOut->addHTML( $out );
 422         }
 423
 424         /**
 425          * Show some introductory text
 426          * FIXME Wikimedia-specific policy text
 427          */
 428         protected function addUsageText() {
 429                 global $wgOut, $wgUser;
 430                 $wgOut->addWikiMsg( 'revdelete-text' );
 431                 if( $wgUser->isAllowed( 'suppressrevision' ) ) {
 432                         $wgOut->addWikiMsg( 'revdelete-suppress-text' );
 433                 }
 434                 if( $this->mIsAllowed ) {
 435                         $wgOut->addWikiMsg( 'revdelete-confirm' );
 436                 }
 437         }
 438
 439         /**
 440         * @return String: HTML
 441         */
 442         protected function buildCheckBoxes() {
 443                 global $wgRequest;
 444
 445                 $html = '<table>';
 446                 // If there is just one item, use checkboxes
 447                 $list = $this->getList();
 448                 if( $list->length() == 1 ) {
 449                         $list->reset();
 450                         $bitfield = $list->current()->getBits(); // existing field
 451                         if( $this->submitClicked ) {
 452                                 $bitfield = $this->extractBitfield( $this->extractBitParams($wgRequest), $bitfield );
 453                         }
 454                         foreach( $this->checks as $item ) {
 455                                 list( $message, $name, $field ) = $item;
 456                                 $innerHTML = Xml::checkLabel( wfMsg($message), $name, $name, $bitfield & $field );
 457                                 if( $field == Revision::DELETED_RESTRICTED )
 458                                         $innerHTML = "<b>$innerHTML</b>";
 459                                 $line = Xml::tags( 'td', array( 'class' => 'mw-input' ), $innerHTML );
 460                                 $html .= "<tr>$line</tr>\n";
 461                         }
 462                 // Otherwise, use tri-state radios
 463                 } else {
 464                         $html .= '<tr>';
 465                         $html .= '<th class="mw-revdel-checkbox">'.wfMsgHtml('revdelete-radio-same').'</th>';
 466                         $html .= '<th class="mw-revdel-checkbox">'.wfMsgHtml('revdelete-radio-unset').'</th>';
 467                         $html .= '<th class="mw-revdel-checkbox">'.wfMsgHtml('revdelete-radio-set').'</th>';
 468                         $html .= "<th></th></tr>\n";
 469                         foreach( $this->checks as $item ) {
 470                                 list( $message, $name, $field ) = $item;
 471                                 // If there are several items, use third state by default...
 472                                 if( $this->submitClicked ) {
 473                                         $selected = $wgRequest->getInt( $name, 0 /* unchecked */ );
 474                                 } else {
 475                                         $selected = -1; // use existing field
 476                                 }
 477                                 $line = '<td class="mw-revdel-checkbox">' . Xml::radio( $name, -1, $selected == -1 ) . '</td>';
 478                                 $line .= '<td class="mw-revdel-checkbox">' . Xml::radio( $name, 0, $selected == 0 ) . '</td>';
 479                                 $line .= '<td class="mw-revdel-checkbox">' . Xml::radio( $name, 1, $selected == 1 ) . '</td>';
 480                                 $label = wfMsgHtml($message);
 481                                 if( $field == Revision::DELETED_RESTRICTED ) {
 482                                         $label = "<b>$label</b>";
 483                                 }
 484                                 $line .= "<td>$label</td>";
 485                                 $html .= "<tr>$line</tr>\n";
 486                         }
 487                 }
 488
 489                 $html .= '</table>';
 490                 return $html;
 491         }
 492
 493         /**
 494          * UI entry point for form submission.
 495          * @param $request WebRequest
 496          */
 497         protected function submit( $request ) {
 498                 global $wgUser, $wgOut;
 499                 # Check edit token on submission
 500                 if( $this->submitClicked && !$wgUser->matchEditToken( $request->getVal('wpEditToken') ) ) {
 501                         $wgOut->addWikiMsg( 'sessionfailure' );
 502                         return false;
 503                 }
 504                 $bitParams = $this->extractBitParams( $request );
 505                 $listReason = $request->getText( 'wpRevDeleteReasonList', 'other' ); // from dropdown
 506                 $comment = $listReason;
 507                 if( $comment != 'other' && $this->otherReason != '' ) {
 508                         // Entry from drop down menu + additional comment
 509                         $comment .= wfMsgForContent( 'colon-separator' ) . $this->otherReason;
 510                 } elseif( $comment == 'other' ) {
 511                         $comment = $this->otherReason;
 512                 }
 513                 # Can the user set this field?
 514                 if( $bitParams[Revision::DELETED_RESTRICTED]==1 && !$wgUser->isAllowed('suppressrevision') ) {
 515                         $wgOut->permissionRequired( 'suppressrevision' );
 516                         return false;
 517                 }
 518                 # If the save went through, go to success message...
 519                 $status = $this->save( $bitParams, $comment, $this->targetObj );
 520                 if ( $status->isGood() ) {
 521                         $this->success();
 522                         return true;
 523                 # ...otherwise, bounce back to form...
 524                 } else {
 525                         $this->failure( $status );
 526                 }
 527                 return false;
 528         }
 529
 530         /**
 531          * Report that the submit operation succeeded
 532          */
 533         protected function success() {
 534                 global $wgOut;
 535                 $wgOut->setPagetitle( wfMsg( 'actioncomplete' ) );
 536                 $wgOut->wrapWikiMsg( '<span class="success">$1</span>', $this->typeInfo['success'] );
 537                 $this->list->reloadFromMaster();
 538                 $this->showForm();
 539         }
 540
 541         /**
 542          * Report that the submit operation failed
 543          */
 544         protected function failure( $status ) {
 545                 global $wgOut;
 546                 $wgOut->setPagetitle( wfMsg( 'actionfailed' ) );
 547                 $wgOut->addWikiText( $status->getWikiText( $this->typeInfo['failure'] ) );
 548                 $this->showForm();
 549         }
 550
 551         /**
 552          * Put together an array that contains -1, 0, or the *_deleted const for each bit
 553          * @param $request WebRequest
 554          * @return array
 555          */
 556         protected function extractBitParams( $request ) {
 557                 $bitfield = array();
 558                 foreach( $this->checks as $item ) {
 559                         list( /* message */ , $name, $field ) = $item;
 560                         $val = $request->getInt( $name, 0 /* unchecked */ );
 561                         if( $val < -1 || $val > 1) {
 562                                 $val = -1; // -1 for existing value
 563                         }
 564                         $bitfield[$field] = $val;
 565                 }
 566                 if( !isset($bitfield[Revision::DELETED_RESTRICTED]) ) {
 567                         $bitfield[Revision::DELETED_RESTRICTED] = 0;
 568                 }
 569                 return $bitfield;
 570         }
 571
 572         /**
 573          * Put together a rev_deleted bitfield
 574          * @param $bitPars array extractBitParams() params
 575          * @param $oldfield int current bitfield
 576          * @return array
 577          */
 578         public static function extractBitfield( $bitPars, $oldfield ) {
 579                 // Build the actual new rev_deleted bitfield
 580                 $newBits = 0;
 581                 foreach( $bitPars as $const => $val ) {
 582                         if( $val == 1 ) {
 583                                 $newBits |= $const; // $const is the *_deleted const
 584                         } else if( $val == -1 ) {
 585                                 $newBits |= ($oldfield & $const); // use existing
 586                         }
 587                 }
 588                 return $newBits;
 589         }
 590
 591         /**
 592          * Do the write operations. Simple wrapper for RevDel_*List::setVisibility().
 593          */
 594         protected function save( $bitfield, $reason, $title ) {
 595                 return $this->getList()->setVisibility(
 596                         array( 'value' => $bitfield, 'comment' => $reason )
 597                 );
 598         }
 599 }
 600
 601 /**
 602  * Temporary b/c interface, collection of static functions.
 603  * @ingroup SpecialPage
 604  */
 605 class RevisionDeleter {
 606         /**
 607          * Checks for a change in the bitfield for a certain option and updates the
 608          * provided array accordingly.
 609          *
 610          * @param $desc String: description to add to the array if the option was
 611          * enabled / disabled.
 612          * @param $field Integer: the bitmask describing the single option.
 613          * @param $diff Integer: the xor of the old and new bitfields.
 614          * @param $new Integer: the new bitfield
 615          * @param $arr Array: the array to update.
 616          */
 617         protected static function checkItem( $desc, $field, $diff, $new, &$arr ) {
 618                 if( $diff & $field ) {
 619                         $arr[ ( $new & $field ) ? 0 : 1 ][] = $desc;
 620                 }
 621         }
 622
 623         /**
 624          * Gets an array of message keys describing the changes made to the visibility
 625          * of the revision. If the resulting array is $arr, then $arr[0] will contain an
 626          * array of strings describing the items that were hidden, $arr[2] will contain
 627          * an array of strings describing the items that were unhidden, and $arr[3] will
 628          * contain an array with a single string, which can be one of "applied
 629          * restrictions to sysops", "removed restrictions from sysops", or null.
 630          *
 631          * @param $n Integer: the new bitfield.
 632          * @param $o Integer: the old bitfield.
 633          * @return An array as described above.
 634          */
 635         protected static function getChanges( $n, $o ) {
 636                 $diff = $n ^ $o;
 637                 $ret = array( 0 => array(), 1 => array(), 2 => array() );
 638                 // Build bitfield changes in language
 639                 self::checkItem( 'revdelete-content',
 640                         Revision::DELETED_TEXT, $diff, $n, $ret );
 641                 self::checkItem( 'revdelete-summary',
 642                         Revision::DELETED_COMMENT, $diff, $n, $ret );
 643                 self::checkItem( 'revdelete-uname',
 644                         Revision::DELETED_USER, $diff, $n, $ret );
 645                 // Restriction application to sysops
 646                 if( $diff & Revision::DELETED_RESTRICTED ) {
 647                         if( $n & Revision::DELETED_RESTRICTED )
 648                                 $ret[2][] = 'revdelete-restricted';
 649                         else
 650                                 $ret[2][] = 'revdelete-unrestricted';
 651                 }
 652                 return $ret;
 653         }
 654
 655         /**
 656          * Gets a log message to describe the given revision visibility change. This
 657          * message will be of the form "[hid {content, edit summary, username}];
 658          * [unhid {...}][applied restrictions to sysops] for $count revisions: $comment".
 659          *
 660          * @param $count Integer: The number of effected revisions.
 661          * @param $nbitfield Integer: The new bitfield for the revision.
 662          * @param $obitfield Integer: The old bitfield for the revision.
 663          * @param $isForLog Boolean
 664          * @param $forContent Boolean
 665          */
 666         public static function getLogMessage( $count, $nbitfield, $obitfield, $isForLog = false, $forContent = false ) {
 667                 global $wgLang, $wgContLang;
 668
 669                 $lang = $forContent ? $wgContLang : $wgLang;
 670                 $msgFunc = $forContent ? "wfMsgForContent" : "wfMsg";
 671
 672                 $s = '';
 673                 $changes = self::getChanges( $nbitfield, $obitfield );
 674                 array_walk($changes, 'RevisionDeleter::expandMessageArray', $forContent);
 675
 676                 $changesText = array();
 677
 678                 if( count( $changes[0] ) ) {
 679                         $changesText[] = $msgFunc( 'revdelete-hid', $lang->commaList( $changes[0] ) );
 680                 }
 681                 if( count( $changes[1] ) ) {
 682                         $changesText[] = $msgFunc( 'revdelete-unhid', $lang->commaList( $changes[1] ) );
 683                 }
 684
 685                 $s = $lang->semicolonList( $changesText );
 686                 if( count( $changes[2] ) ) {
 687                         $s .= $s ? ' (' . $changes[2][0] . ')' : ' ' . $changes[2][0];
 688                 }
 689
 690                 $msg = $isForLog ? 'logdelete-log-message' : 'revdelete-log-message';
 691                 return wfMsgExt( $msg, $forContent ? array( 'parsemag', 'content' ) : array( 'parsemag' ), $s, $lang->formatNum($count) );
 692         }
 693
 694         private static function expandMessageArray(& $msg, $key, $forContent) {
 695                 if ( is_array ($msg) ) {
 696                         array_walk($msg, 'RevisionDeleter::expandMessageArray', $forContent);
 697                 } else {
 698                         if ( $forContent ) {
 699                                 $msg = wfMsgForContent($msg);
 700                         } else {
 701                                 $msg = wfMsg($msg);
 702                         }
 703                 }
 704         }
 705
 706         // Get DB field name for URL param...
 707         // Future code for other things may also track
 708         // other types of revision-specific changes.
 709         // @returns string One of log_id/rev_id/fa_id/ar_timestamp/oi_archive_name
 710         public static function getRelationType( $typeName ) {
 711                 if ( isset( SpecialRevisionDelete::$deprecatedTypeMap[$typeName] ) ) {
 712                         $typeName = SpecialRevisionDelete::$deprecatedTypeMap[$typeName];
 713                 }
 714                 if ( isset( SpecialRevisionDelete::$allowedTypes[$typeName] ) ) {
 715                         $class = SpecialRevisionDelete::$allowedTypes[$typeName]['list-class'];
 716                         $list = new $class( null, null, null );
 717                         return $list->getIdField();
 718                 } else {
 719                         return null;
 720                 }
 721         }
 722
 723         // Checks if a revision still exists in the revision table.
 724         //  If it doesn't, returns the corresponding ar_timestamp field
 725         //  so that this key can be used instead.
 726         public static function checkRevisionExistence( $title, $revid ) {
 727                 $dbr = wfGetDB( DB_SLAVE );
 728                 $exists = $dbr->selectField( 'revision', '1',
 729                                 array( 'rev_id' => $revid ), __METHOD__ );
 730
 731                 if ( $exists ) {
 732                         return true;
 733                 }
 734
 735                 $timestamp = $dbr->selectField( 'archive', 'ar_timestamp',
 736                                 array( 'ar_namespace' => $title->getNamespace(),
 737                                         'ar_title' => $title->getDBkey(),
 738                                         'ar_rev_id' => $revid ), __METHOD__ );
 739
 740                 return $timestamp;
 741         }
 742
 743         // Creates utility links for log entries.
 744         public static function getLogLinks( $title, $paramArray, $skin, $messages ) {
 745                 global $wgLang;
 746
 747                 if( count($paramArray) >= 2 ) {
 748                         // Different revision types use different URL params...
 749                         $originalKey = $key = $paramArray[0];
 750                         // $paramArray[1] is a CSV of the IDs
 751                         $Ids = explode( ',', $paramArray[1] );
 752                         $query = $paramArray[1];
 753                         $revert = array();
 754
 755                         // For if undeleted revisions are found amidst deleted ones.
 756                         $undeletedRevisions = array();
 757
 758                         // This is not going to work if some revs are deleted and some
 759                         //  aren't.
 760                         if ($key == 'revision') {
 761                                 foreach( $Ids as $k => $id ) {
 762                                         $existResult =
 763                                                 self::checkRevisionExistence( $title, $id );
 764
 765                                         if ($existResult !== true) {
 766                                                 $key = 'archive';
 767                                                 $Ids[$k] = $existResult;
 768                                         } elseif ($key != $originalKey) {
 769                                                 // Undeleted revision amidst deleted ones
 770                                                 unset($Ids[$k]);
 771                                                 $undeletedRevisions[] = $id;
 772                                         }
 773                                 }
 774                         }
 775
 776                         // Diff link for single rev deletions
 777                         if( count($Ids) == 1 && !count($undeletedRevisions) ) {
 778                                 // Live revision diffs...
 779                                 if( in_array( $key, array( 'oldid', 'revision' ) ) ) {
 780                                         $revert[] = $skin->link(
 781                                                 $title,
 782                                                 $messages['diff'],
 783                                                 array(),
 784                                                 array(
 785                                                         'diff' => intval( $Ids[0] ),
 786                                                         'unhide' => 1
 787                                                 ),
 788                                                 array( 'known', 'noclasses' )
 789                                         );
 790                                 // Deleted revision diffs...
 791                                 } else if( in_array( $key, array( 'artimestamp','archive' ) ) ) {
 792                                         $revert[] = $skin->link(
 793                                                 SpecialPage::getTitleFor( 'Undelete' ),
 794                                                 $messages['diff'],
 795                                                 array(),
 796                                                 array(
 797                                                         'target'    => $title->getPrefixedDBKey(),
 798                                                         'diff'      => 'prev',
 799                                                         'timestamp' => $Ids[0]
 800                                                 ),
 801                                                 array( 'known', 'noclasses' )
 802                                         );
 803                                 }
 804                         }
 805
 806                         // View/modify link...
 807                         if ( count($undeletedRevisions) ) {
 808                                 // FIXME THIS IS A HORRIBLE HORRIBLE HACK AND SHOULD DIE
 809                                 // It's not possible to pass a list of both deleted and
 810                                 // undeleted revisions to SpecialRevisionDelete, so we're
 811                                 // stuck with two links. See bug 23363.
 812                                 $restoreLinks = array();
 813
 814                                 $restoreLinks[] = $skin->link(
 815                                         SpecialPage::getTitleFor( 'Revisiondelete' ),
 816                                         $messages['revdel-restore-visible'],
 817                                         array(),
 818                                         array(
 819                                                 'target' => $title->getPrefixedText(),
 820                                                 'type' => $originalKey,
 821                                                 'ids' => implode(',', $undeletedRevisions),
 822                                         ),
 823                                         array( 'known', 'noclasses' )
 824                                 );
 825
 826                                 $restoreLinks[] = $skin->link(
 827                                         SpecialPage::getTitleFor( 'Revisiondelete' ),
 828                                         $messages['revdel-restore-deleted'],
 829                                         array(),
 830                                         array(
 831                                                 'target' => $title->getPrefixedText(),
 832                                                 'type' => $key,
 833                                                 'ids' => implode(',', $Ids),
 834                                         ),
 835                                         array( 'known', 'noclasses' )
 836                                 );
 837
 838                                 $revert[] = $messages['revdel-restore'] . ' [' .
 839                                                 $wgLang->pipeList( $restoreLinks ) . ']';
 840                         } else {
 841                                 $revert[] = $skin->link(
 842                                         SpecialPage::getTitleFor( 'Revisiondelete' ),
 843                                         $messages['revdel-restore'],
 844                                         array(),
 845                                         array(
 846                                                 'target' => $title->getPrefixedText(),
 847                                                 'type' => $key,
 848                                                 'ids' => implode(',', $Ids),
 849                                         ),
 850                                         array( 'known', 'noclasses' )
 851                                 );
 852                         }
 853
 854                         // Pipe links
 855                         $revert = wfMsg( 'parentheses', $wgLang->pipeList( $revert ) );
 856                 }
 857                 return $revert;
 858         }
 859 }
 860
 861 /**
 862  * Abstract base class for a list of deletable items
 863  */
 864 abstract class RevDel_List {
 865         var $special, $title, $ids, $res, $current;
 866         var $type = null; // override this
 867         var $idField = null; // override this
 868         var $dateField = false; // override this
 869         var $authorIdField = false; // override this
 870         var $authorNameField = false; // override this
 871
 872         /**
 873          * @param $special The parent SpecialPage
 874          * @param $title The target title
 875          * @param $ids Array of IDs
 876          */
 877         public function __construct( $special, $title, $ids ) {
 878                 $this->special = $special;
 879                 $this->title = $title;
 880                 $this->ids = $ids;
 881         }
 882
 883         /**
 884          * Get the internal type name of this list. Equal to the table name.
 885          */
 886         public function getType() {
 887                 return $this->type;
 888         }
 889
 890         /**
 891          * Get the DB field name associated with the ID list
 892          */
 893         public function getIdField() {
 894                 return $this->idField;
 895         }
 896
 897         /**
 898          * Get the DB field name storing timestamps
 899          */
 900         public function getTimestampField() {
 901                 return $this->dateField;
 902         }
 903
 904         /**
 905          * Get the DB field name storing user ids
 906          */
 907         public function getAuthorIdField() {
 908                 return $this->authorIdField;
 909         }
 910
 911         /**
 912          * Get the DB field name storing user names
 913          */
 914         public function getAuthorNameField() {
 915                 return $this->authorNameField;
 916         }
 917         /**
 918          * Set the visibility for the revisions in this list. Logging and
 919          * transactions are done here.
 920          *
 921          * @param $params Associative array of parameters. Members are:
 922          *     value:       The integer value to set the visibility to
 923          *     comment:     The log comment.
 924          * @return Status
 925          */
 926         public function setVisibility( $params ) {
 927                 $bitPars = $params['value'];
 928                 $comment = $params['comment'];
 929
 930                 $this->res = false;
 931                 $dbw = wfGetDB( DB_MASTER );
 932                 $this->doQuery( $dbw );
 933                 $dbw->begin();
 934                 $status = Status::newGood();
 935                 $missing = array_flip( $this->ids );
 936                 $this->clearFileOps();
 937                 $idsForLog = array();
 938                 $authorIds = $authorIPs = array();
 939
 940                 for ( $this->reset(); $this->current(); $this->next() ) {
 941                         $item = $this->current();
 942                         unset( $missing[ $item->getId() ] );
 943
 944                         $oldBits = $item->getBits();
 945                         // Build the actual new rev_deleted bitfield
 946                         $newBits = SpecialRevisionDelete::extractBitfield( $bitPars, $oldBits );
 947
 948                         if ( $oldBits == $newBits ) {
 949                                 $status->warning( 'revdelete-no-change', $item->formatDate(), $item->formatTime() );
 950                                 $status->failCount++;
 951                                 continue;
 952                         } elseif ( $oldBits == 0 && $newBits != 0 ) {
 953                                 $opType = 'hide';
 954                         } elseif ( $oldBits != 0 && $newBits == 0 ) {
 955                                 $opType = 'show';
 956                         } else {
 957                                 $opType = 'modify';
 958                         }
 959
 960                         if ( $item->isHideCurrentOp( $newBits ) ) {
 961                                 // Cannot hide current version text
 962                                 $status->error( 'revdelete-hide-current', $item->formatDate(), $item->formatTime() );
 963                                 $status->failCount++;
 964                                 continue;
 965                         }
 966                         if ( !$item->canView() ) {
 967                                 // Cannot access this revision
 968                                 $msg = ($opType == 'show') ?
 969                                         'revdelete-show-no-access' : 'revdelete-modify-no-access';
 970                                 $status->error( $msg, $item->formatDate(), $item->formatTime() );
 971                                 $status->failCount++;
 972                                 continue;
 973                         }
 974                         // Cannot just "hide from Sysops" without hiding any fields
 975                         if( $newBits == Revision::DELETED_RESTRICTED ) {
 976                                 $status->warning( 'revdelete-only-restricted', $item->formatDate(), $item->formatTime() );
 977                                 $status->failCount++;
 978                                 continue;
 979                         }
 980
 981                         // Update the revision
 982                         $ok = $item->setBits( $newBits );
 983
 984                         if ( $ok ) {
 985                                 $idsForLog[] = $item->getId();
 986                                 $status->successCount++;
 987                                 if( $item->getAuthorId() > 0 ) {
 988                                         $authorIds[] = $item->getAuthorId();
 989                                 } else if( IP::isIPAddress( $item->getAuthorName() ) ) {
 990                                         $authorIPs[] = $item->getAuthorName();
 991                                 }
 992                         } else {
 993                                 $status->error( 'revdelete-concurrent-change', $item->formatDate(), $item->formatTime() );
 994                                 $status->failCount++;
 995                         }
 996                 }
 997
 998                 // Handle missing revisions
 999                 foreach ( $missing as $id => $unused ) {
1000                         $status->error( 'revdelete-modify-missing', $id );
1001                         $status->failCount++;
1002                 }
1003
1004                 if ( $status->successCount == 0 ) {
1005                         $status->ok = false;
1006                         $dbw->rollback();
1007                         return $status;
1008                 }
1009
1010                 // Save success count
1011                 $successCount = $status->successCount;
1012
1013                 // Move files, if there are any
1014                 $status->merge( $this->doPreCommitUpdates() );
1015                 if ( !$status->isOK() ) {
1016                         // Fatal error, such as no configured archive directory
1017                         $dbw->rollback();
1018                         return $status;
1019                 }
1020
1021                 // Log it
1022                 $this->updateLog( array(
1023                         'title' => $this->title,
1024                         'count' => $successCount,
1025                         'newBits' => $newBits,
1026                         'oldBits' => $oldBits,
1027                         'comment' => $comment,
1028                         'ids' => $idsForLog,
1029                         'authorIds' => $authorIds,
1030                         'authorIPs' => $authorIPs
1031                 ) );
1032                 $dbw->commit();
1033
1034                 // Clear caches
1035                 $status->merge( $this->doPostCommitUpdates() );
1036                 return $status;
1037         }
1038
1039         /**
1040          * Reload the list data from the master DB. This can be done after setVisibility()
1041          * to allow $item->getHTML() to show the new data.
1042          */
1043         function reloadFromMaster() {
1044                 $dbw = wfGetDB( DB_MASTER );
1045                 $this->res = $this->doQuery( $dbw );
1046         }
1047
1048         /**
1049          * Record a log entry on the action
1050          * @param $params Associative array of parameters:
1051          *     newBits:         The new value of the *_deleted bitfield
1052          *     oldBits:         The old value of the *_deleted bitfield.
1053          *     title:           The target title
1054          *     ids:             The ID list
1055          *     comment:         The log comment
1056          *     authorsIds:      The array of the user IDs of the offenders
1057          *     authorsIPs:      The array of the IP/anon user offenders
1058          */
1059         protected function updateLog( $params ) {
1060                 // Get the URL param's corresponding DB field
1061                 $field = RevisionDeleter::getRelationType( $this->getType() );
1062                 if( !$field ) {
1063                         throw new MWException( "Bad log URL param type!" );
1064                 }
1065                 // Put things hidden from sysops in the oversight log
1066                 if ( ( $params['newBits'] | $params['oldBits'] ) & $this->getSuppressBit() ) {
1067                         $logType = 'suppress';
1068                 } else {
1069                         $logType = 'delete';
1070                 }
1071                 // Add params for effected page and ids
1072                 $logParams = $this->getLogParams( $params );
1073                 // Actually add the deletion log entry
1074                 $log = new LogPage( $logType );
1075                 $logid = $log->addEntry( $this->getLogAction(), $params['title'],
1076                         $params['comment'], $logParams );
1077                 // Allow for easy searching of deletion log items for revision/log items
1078                 $log->addRelations( $field, $params['ids'], $logid );
1079                 $log->addRelations( 'target_author_id', $params['authorIds'], $logid );
1080                 $log->addRelations( 'target_author_ip', $params['authorIPs'], $logid );
1081         }
1082
1083         /**
1084          * Get the log action for this list type
1085          */
1086         public function getLogAction() {
1087                 return 'revision';
1088         }
1089
1090         /**
1091          * Get log parameter array.
1092          * @param $params Associative array of log parameters, same as updateLog()
1093          * @return array
1094          */
1095         public function getLogParams( $params ) {
1096                 return array(
1097                         $this->getType(),
1098                         implode( ',', $params['ids'] ),
1099                         "ofield={$params['oldBits']}",
1100                         "nfield={$params['newBits']}"
1101                 );
1102         }
1103
1104         /**
1105          * Initialise the current iteration pointer
1106          */
1107         protected function initCurrent() {
1108                 $row = $this->res->current();
1109                 if ( $row ) {
1110                         $this->current = $this->newItem( $row );
1111                 } else {
1112                         $this->current = false;
1113                 }
1114         }
1115
1116         /**
1117          * Start iteration. This must be called before current() or next().
1118          * @return First list item
1119          */
1120         public function reset() {
1121                 if ( !$this->res ) {
1122                         $this->res = $this->doQuery( wfGetDB( DB_SLAVE ) );
1123                 } else {
1124                         $this->res->rewind();
1125                 }
1126                 $this->initCurrent();
1127                 return $this->current;
1128         }
1129
1130         /**
1131          * Get the current list item, or false if we are at the end
1132          */
1133         public function current() {
1134                 return $this->current;
1135         }
1136
1137         /**
1138          * Move the iteration pointer to the next list item, and return it.
1139          */
1140         public function next() {
1141                 $this->res->next();
1142                 $this->initCurrent();
1143                 return $this->current;
1144         }
1145
1146         /**
1147          * Get the number of items in the list.
1148          */
1149         public function length() {
1150                 if( !$this->res ) {
1151                         return 0;
1152                 } else {
1153                         return $this->res->numRows();
1154                 }
1155         }
1156
1157         /**
1158          * Clear any data structures needed for doPreCommitUpdates() and doPostCommitUpdates()
1159          * STUB
1160          */
1161         public function clearFileOps() {
1162         }
1163
1164         /**
1165          * A hook for setVisibility(): do batch updates pre-commit.
1166          * STUB
1167          * @return Status
1168          */
1169         public function doPreCommitUpdates() {
1170                 return Status::newGood();
1171         }
1172
1173         /**
1174          * A hook for setVisibility(): do any necessary updates post-commit.
1175          * STUB
1176          * @return Status
1177          */
1178         public function doPostCommitUpdates() {
1179                 return Status::newGood();
1180         }
1181
1182         /**
1183          * Create an item object from a DB result row
1184          * @param $row stdclass
1185          */
1186         abstract public function newItem( $row );
1187
1188         /**
1189          * Do the DB query to iterate through the objects.
1190          * @param $db Database object to use for the query
1191          */
1192         abstract public function doQuery( $db );
1193
1194         /**
1195          * Get the integer value of the flag used for suppression
1196          */
1197         abstract public function getSuppressBit();
1198 }
1199
1200 /**
1201  * Abstract base class for deletable items
1202  */
1203 abstract class RevDel_Item {
1204         /** The parent SpecialPage */
1205         var $special;
1206
1207         /** The parent RevDel_List */
1208         var $list;
1209
1210         /** The DB result row */
1211         var $row;
1212
1213         /**
1214          * @param $list RevDel_List
1215          * @param $row DB result row
1216          */
1217         public function __construct( $list, $row ) {
1218                 $this->special = $list->special;
1219                 $this->list = $list;
1220                 $this->row = $row;
1221         }
1222
1223         /**
1224          * Get the ID, as it would appear in the ids URL parameter
1225          */
1226         public function getId() {
1227                 $field = $this->list->getIdField();
1228                 return $this->row->$field;
1229         }
1230
1231         /**
1232          * Get the date, formatted with $wgLang
1233          */
1234         public function formatDate() {
1235                 global $wgLang;
1236                 return $wgLang->date( $this->getTimestamp() );
1237         }
1238
1239         /**
1240          * Get the time, formatted with $wgLang
1241          */
1242         public function formatTime() {
1243                 global $wgLang;
1244                 return $wgLang->time( $this->getTimestamp() );
1245         }
1246
1247         /**
1248          * Get the timestamp in MW 14-char form
1249          */
1250         public function getTimestamp() {
1251                 $field = $this->list->getTimestampField();
1252                 return wfTimestamp( TS_MW, $this->row->$field );
1253         }
1254
1255         /**
1256          * Get the author user ID
1257          */
1258         public function getAuthorId() {
1259                 $field = $this->list->getAuthorIdField();
1260                 return intval( $this->row->$field );
1261         }
1262
1263         /**
1264          * Get the author user name
1265          */
1266         public function getAuthorName() {
1267                 $field = $this->list->getAuthorNameField();
1268                 return strval( $this->row->$field );
1269         }
1270
1271         /**
1272          * Returns true if the item is "current", and the operation to set the given
1273          * bits can't be executed for that reason
1274          * STUB
1275          */
1276         public function isHideCurrentOp( $newBits ) {
1277                 return false;
1278         }
1279
1280         /**
1281          * Returns true if the current user can view the item
1282          */
1283         abstract public function canView();
1284
1285         /**
1286          * Returns true if the current user can view the item text/file
1287          */
1288         abstract public function canViewContent();
1289
1290         /**
1291          * Get the current deletion bitfield value
1292          */
1293         abstract public function getBits();
1294
1295         /**
1296          * Get the HTML of the list item. Should be include <li></li> tags.
1297          * This is used to show the list in HTML form, by the special page.
1298          */
1299         abstract public function getHTML();
1300
1301         /**
1302          * Set the visibility of the item. This should do any necessary DB queries.
1303          *
1304          * The DB update query should have a condition which forces it to only update
1305          * if the value in the DB matches the value fetched earlier with the SELECT.
1306          * If the update fails because it did not match, the function should return
1307          * false. This prevents concurrency problems.
1308          *
1309          * @return boolean success
1310          */
1311         abstract public function setBits( $newBits );
1312 }
1313
1314 /**
1315  * List for revision table items
1316  */
1317 class RevDel_RevisionList extends RevDel_List {
1318         var $currentRevId;
1319         var $type = 'revision';
1320         var $idField = 'rev_id';
1321         var $dateField = 'rev_timestamp';
1322         var $authorIdField = 'rev_user';
1323         var $authorNameField = 'rev_user_text';
1324
1325         public function doQuery( $db ) {
1326                 $ids = array_map( 'intval', $this->ids );
1327                 return $db->select( array('revision','page'), '*',
1328                         array(
1329                                 'rev_page' => $this->title->getArticleID(),
1330                                 'rev_id'   => $ids,
1331                                 'rev_page = page_id'
1332                         ),
1333                         __METHOD__,
1334                         array( 'ORDER BY' => 'rev_id DESC' )
1335                 );
1336         }
1337
1338         public function newItem( $row ) {
1339                 return new RevDel_RevisionItem( $this, $row );
1340         }
1341
1342         public function getCurrent() {
1343                 if ( is_null( $this->currentRevId ) ) {
1344                         $dbw = wfGetDB( DB_MASTER );
1345                         $this->currentRevId = $dbw->selectField(
1346                                 'page', 'page_latest', $this->title->pageCond(), __METHOD__ );
1347                 }
1348                 return $this->currentRevId;
1349         }
1350
1351         public function getSuppressBit() {
1352                 return Revision::DELETED_RESTRICTED;
1353         }
1354
1355         public function doPreCommitUpdates() {
1356                 $this->title->invalidateCache();
1357                 return Status::newGood();
1358         }
1359
1360         public function doPostCommitUpdates() {
1361                 $this->title->purgeSquid();
1362                 // Extensions that require referencing previous revisions may need this
1363                 wfRunHooks( 'ArticleRevisionVisiblitySet', array( &$this->title ) );
1364                 return Status::newGood();
1365         }
1366 }
1367
1368 /**
1369  * Item class for a revision table row
1370  */
1371 class RevDel_RevisionItem extends RevDel_Item {
1372         var $revision;
1373
1374         public function __construct( $list, $row ) {
1375                 parent::__construct( $list, $row );
1376                 $this->revision = new Revision( $row );
1377         }
1378
1379         public function canView() {
1380                 return $this->revision->userCan( Revision::DELETED_RESTRICTED );
1381         }
1382
1383         public function canViewContent() {
1384                 return $this->revision->userCan( Revision::DELETED_TEXT );
1385         }
1386
1387         public function getBits() {
1388                 return $this->revision->mDeleted;
1389         }
1390
1391         public function setBits( $bits ) {
1392                 $dbw = wfGetDB( DB_MASTER );
1393                 // Update revision table
1394                 $dbw->update( 'revision',
1395                         array( 'rev_deleted' => $bits ),
1396                         array(
1397                                 'rev_id' => $this->revision->getId(),
1398                                 'rev_page' => $this->revision->getPage(),
1399                                 'rev_deleted' => $this->getBits()
1400                         ),
1401                         __METHOD__
1402                 );
1403                 if ( !$dbw->affectedRows() ) {
1404                         // Concurrent fail!
1405                         return false;
1406                 }
1407                 // Update recentchanges table
1408                 $dbw->update( 'recentchanges',
1409                         array(
1410                                 'rc_deleted' => $bits,
1411                                 'rc_patrolled' => 1
1412                         ),
1413                         array(
1414                                 'rc_this_oldid' => $this->revision->getId(), // condition
1415                                 // non-unique timestamp index
1416                                 'rc_timestamp' => $dbw->timestamp( $this->revision->getTimestamp() ),
1417                         ),
1418                         __METHOD__
1419                 );
1420                 return true;
1421         }
1422
1423         public function isDeleted() {
1424                 return $this->revision->isDeleted( Revision::DELETED_TEXT );
1425         }
1426
1427         public function isHideCurrentOp( $newBits ) {
1428                 return ( $newBits & Revision::DELETED_TEXT )
1429                         && $this->list->getCurrent() == $this->getId();
1430         }
1431
1432         /**
1433          * Get the HTML link to the revision text.
1434          * Overridden by RevDel_ArchiveItem.
1435          */
1436         protected function getRevisionLink() {
1437                 global $wgLang;
1438                 $date = $wgLang->timeanddate( $this->revision->getTimestamp(), true );
1439                 if ( $this->isDeleted() && !$this->canViewContent() ) {
1440                         return $date;
1441                 }
1442                 return $this->special->skin->link(
1443                         $this->list->title,
1444                         $date,
1445                         array(),
1446                         array(
1447                                 'oldid' => $this->revision->getId(),
1448                                 'unhide' => 1
1449                         )
1450                 );
1451         }
1452
1453         /**
1454          * Get the HTML link to the diff.
1455          * Overridden by RevDel_ArchiveItem
1456          */
1457         protected function getDiffLink() {
1458                 if ( $this->isDeleted() && !$this->canViewContent() ) {
1459                         return wfMsgHtml('diff');
1460                 } else {
1461                         return
1462                                 $this->special->skin->link(
1463                                         $this->list->title,
1464                                         wfMsgHtml('diff'),
1465                                         array(),
1466                                         array(
1467                                                 'diff' => $this->revision->getId(),
1468                                                 'oldid' => 'prev',
1469                                                 'unhide' => 1
1470                                         ),
1471                                         array(
1472                                                 'known',
1473                                                 'noclasses'
1474                                         )
1475                                 );
1476                 }
1477         }
1478
1479         public function getHTML() {
1480                 $difflink = $this->getDiffLink();
1481                 $revlink = $this->getRevisionLink();
1482                 $userlink = $this->special->skin->revUserLink( $this->revision );
1483                 $comment = $this->special->skin->revComment( $this->revision );
1484                 if ( $this->isDeleted() ) {
1485                         $revlink = "<span class=\"history-deleted\">$revlink</span>";
1486                 }
1487                 return "<li>($difflink) $revlink $userlink $comment</li>";
1488         }
1489 }
1490
1491 /**
1492  * List for archive table items, i.e. revisions deleted via action=delete
1493  */
1494 class RevDel_ArchiveList extends RevDel_RevisionList {
1495         var $type = 'archive';
1496         var $idField = 'ar_timestamp';
1497         var $dateField = 'ar_timestamp';
1498         var $authorIdField = 'ar_user';
1499         var $authorNameField = 'ar_user_text';
1500
1501         public function doQuery( $db ) {
1502                 $timestamps = array();
1503                 foreach ( $this->ids as $id ) {
1504                         $timestamps[] = $db->timestamp( $id );
1505                 }
1506                 return $db->select( 'archive', '*',
1507                                 array(
1508                                         'ar_namespace' => $this->title->getNamespace(),
1509                                         'ar_title'     => $this->title->getDBkey(),
1510                                         'ar_timestamp' => $timestamps
1511                                 ),
1512                                 __METHOD__,
1513                                 array( 'ORDER BY' => 'ar_timestamp DESC' )
1514                         );
1515         }
1516
1517         public function newItem( $row ) {
1518                 return new RevDel_ArchiveItem( $this, $row );
1519         }
1520
1521         public function doPreCommitUpdates() {
1522                 return Status::newGood();
1523         }
1524
1525         public function doPostCommitUpdates() {
1526                 return Status::newGood();
1527         }
1528 }
1529
1530 /**
1531  * Item class for a archive table row
1532  */
1533 class RevDel_ArchiveItem extends RevDel_RevisionItem {
1534         public function __construct( $list, $row ) {
1535                 RevDel_Item::__construct( $list, $row );
1536                 $this->revision = Revision::newFromArchiveRow( $row,
1537                         array( 'page' => $this->list->title->getArticleId() ) );
1538         }
1539
1540         public function getId() {
1541                 # Convert DB timestamp to MW timestamp
1542                 return $this->revision->getTimestamp();
1543         }
1544
1545         public function setBits( $bits ) {
1546                 $dbw = wfGetDB( DB_MASTER );
1547                 $dbw->update( 'archive',
1548                         array( 'ar_deleted' => $bits ),
1549                         array( 'ar_namespace' => $this->list->title->getNamespace(),
1550                                 'ar_title'     => $this->list->title->getDBkey(),
1551                                 // use timestamp for index
1552                                 'ar_timestamp' => $this->row->ar_timestamp,
1553                                 'ar_rev_id'    => $this->row->ar_rev_id,
1554                                 'ar_deleted' => $this->getBits()
1555                         ),
1556                         __METHOD__ );
1557                 return (bool)$dbw->affectedRows();
1558         }
1559
1560         protected function getRevisionLink() {
1561                 global $wgLang;
1562                 $undelete = SpecialPage::getTitleFor( 'Undelete' );
1563                 $date = $wgLang->timeanddate( $this->revision->getTimestamp(), true );
1564                 if ( $this->isDeleted() && !$this->canViewContent() ) {
1565                         return $date;
1566                 }
1567                 return $this->special->skin->link( $undelete, $date, array(),
1568                         array(
1569                                 'target' => $this->list->title->getPrefixedText(),
1570                                 'timestamp' => $this->revision->getTimestamp()
1571                         ) );
1572         }
1573
1574         protected function getDiffLink() {
1575                 if ( $this->isDeleted() && !$this->canViewContent() ) {
1576                         return wfMsgHtml( 'diff' );
1577                 }
1578                 $undelete = SpecialPage::getTitleFor( 'Undelete' );
1579                 return $this->special->skin->link( $undelete, wfMsgHtml('diff'), array(),
1580                         array(
1581                                 'target' => $this->list->title->getPrefixedText(),
1582                                 'diff' => 'prev',
1583                                 'timestamp' => $this->revision->getTimestamp()
1584                         ) );
1585         }
1586 }
1587
1588 /**
1589  * List for oldimage table items
1590  */
1591 class RevDel_FileList extends RevDel_List {
1592         var $type = 'oldimage';
1593         var $idField = 'oi_archive_name';
1594         var $dateField = 'oi_timestamp';
1595         var $authorIdField = 'oi_user';
1596         var $authorNameField = 'oi_user_text';
1597         var $storeBatch, $deleteBatch, $cleanupBatch;
1598
1599         public function doQuery( $db ) {
1600                 $archiveName = array();
1601                 foreach( $this->ids as $timestamp ) {
1602                         $archiveNames[] = $timestamp . '!' . $this->title->getDBkey();
1603                 }
1604                 return $db->select( 'oldimage', '*',
1605                         array(
1606                                 'oi_name'         => $this->title->getDBkey(),
1607                                 'oi_archive_name' => $archiveNames
1608                         ),
1609                         __METHOD__,
1610                         array( 'ORDER BY' => 'oi_timestamp DESC' )
1611                 );
1612         }
1613
1614         public function newItem( $row ) {
1615                 return new RevDel_FileItem( $this, $row );
1616         }
1617
1618         public function clearFileOps() {
1619                 $this->deleteBatch = array();
1620                 $this->storeBatch = array();
1621                 $this->cleanupBatch = array();
1622         }
1623
1624         public function doPreCommitUpdates() {
1625                 $status = Status::newGood();
1626                 $repo = RepoGroup::singleton()->getLocalRepo();
1627                 if ( $this->storeBatch ) {
1628                         $status->merge( $repo->storeBatch( $this->storeBatch, FileRepo::OVERWRITE_SAME ) );
1629                 }
1630                 if ( !$status->isOK() ) {
1631                         return $status;
1632                 }
1633                 if ( $this->deleteBatch ) {
1634                         $status->merge( $repo->deleteBatch( $this->deleteBatch ) );
1635                 }
1636                 if ( !$status->isOK() ) {
1637                         // Running cleanupDeletedBatch() after a failed storeBatch() with the DB already
1638                         // modified (but destined for rollback) causes data loss
1639                         return $status;
1640                 }
1641                 if ( $this->cleanupBatch ) {
1642                         $status->merge( $repo->cleanupDeletedBatch( $this->cleanupBatch ) );
1643                 }
1644                 return $status;
1645         }
1646
1647         public function doPostCommitUpdates() {
1648                 $file = wfLocalFile( $this->title );
1649                 $file->purgeCache();
1650                 $file->purgeDescription();
1651                 return Status::newGood();
1652         }
1653
1654         public function getSuppressBit() {
1655                 return File::DELETED_RESTRICTED;
1656         }
1657 }
1658
1659 /**
1660  * Item class for an oldimage table row
1661  */
1662 class RevDel_FileItem extends RevDel_Item {
1663         var $file;
1664
1665         public function __construct( $list, $row ) {
1666                 parent::__construct( $list, $row );
1667                 $this->file = RepoGroup::singleton()->getLocalRepo()->newFileFromRow( $row );
1668         }
1669
1670         public function getId() {
1671                 $parts = explode( '!', $this->row->oi_archive_name );
1672                 return $parts[0];
1673         }
1674
1675         public function canView() {
1676                 return $this->file->userCan( File::DELETED_RESTRICTED );
1677         }
1678
1679         public function canViewContent() {
1680                 return $this->file->userCan( File::DELETED_FILE );
1681         }
1682
1683         public function getBits() {
1684                 return $this->file->getVisibility();
1685         }
1686
1687         public function setBits( $bits ) {
1688                 # Queue the file op
1689                 # FIXME: move to LocalFile.php
1690                 if ( $this->isDeleted() ) {
1691                         if ( $bits & File::DELETED_FILE ) {
1692                                 # Still deleted
1693                         } else {
1694                                 # Newly undeleted
1695                                 $key = $this->file->getStorageKey();
1696                                 $srcRel = $this->file->repo->getDeletedHashPath( $key ) . $key;
1697                                 $this->list->storeBatch[] = array(
1698                                         $this->file->repo->getVirtualUrl( 'deleted' ) . '/' . $srcRel,
1699                                         'public',
1700                                         $this->file->getRel()
1701                                 );
1702                                 $this->list->cleanupBatch[] = $key;
1703                         }
1704                 } elseif ( $bits & File::DELETED_FILE ) {
1705                         # Newly deleted
1706                         $key = $this->file->getStorageKey();
1707                         $dstRel = $this->file->repo->getDeletedHashPath( $key ) . $key;
1708                         $this->list->deleteBatch[] = array( $this->file->getRel(), $dstRel );
1709                 }
1710
1711                 # Do the database operations
1712                 $dbw = wfGetDB( DB_MASTER );
1713                 $dbw->update( 'oldimage',
1714                         array( 'oi_deleted' => $bits ),
1715                         array(
1716                                 'oi_name' => $this->row->oi_name,
1717                                 'oi_timestamp' => $this->row->oi_timestamp,
1718                                 'oi_deleted' => $this->getBits()
1719                         ),
1720                         __METHOD__
1721                 );
1722                 return (bool)$dbw->affectedRows();
1723         }
1724
1725         public function isDeleted() {
1726                 return $this->file->isDeleted( File::DELETED_FILE );
1727         }
1728
1729         /**
1730          * Get the link to the file.
1731          * Overridden by RevDel_ArchivedFileItem.
1732          */
1733         protected function getLink() {
1734                 global $wgLang, $wgUser;
1735                 $date = $wgLang->timeanddate( $this->file->getTimestamp(), true  );
1736                 if ( $this->isDeleted() ) {
1737                         # Hidden files...
1738                         if ( !$this->canViewContent() ) {
1739                                 $link = $date;
1740                         } else {
1741                                 $link = $this->special->skin->link(
1742                                         $this->special->getTitle(),
1743                                         $date, array(),
1744                                         array(
1745                                                 'target' => $this->list->title->getPrefixedText(),
1746                                                 'file'   => $this->file->getArchiveName(),
1747                                                 'token'  => $wgUser->editToken( $this->file->getArchiveName() )
1748                                         )
1749                                 );
1750                         }
1751                         return '<span class="history-deleted">' . $link . '</span>';
1752                 } else {
1753                         # Regular files...
1754                         $url = $this->file->getUrl();
1755                         return Xml::element( 'a', array( 'href' => $this->file->getUrl() ), $date );
1756                 }
1757         }
1758         /**
1759          * Generate a user tool link cluster if the current user is allowed to view it
1760          * @return string HTML
1761          */
1762         protected function getUserTools() {
1763                 if( $this->file->userCan( Revision::DELETED_USER ) ) {
1764                         $link = $this->special->skin->userLink( $this->file->user, $this->file->user_text ) .
1765                                 $this->special->skin->userToolLinks( $this->file->user, $this->file->user_text );
1766                 } else {
1767                         $link = wfMsgHtml( 'rev-deleted-user' );
1768                 }
1769                 if( $this->file->isDeleted( Revision::DELETED_USER ) ) {
1770                         return '<span class="history-deleted">' . $link . '</span>';
1771                 }
1772                 return $link;
1773         }
1774
1775         /**
1776          * Wrap and format the file's comment block, if the current
1777          * user is allowed to view it.
1778          *
1779          * @return string HTML
1780          */
1781         protected function getComment() {
1782                 if( $this->file->userCan( File::DELETED_COMMENT ) ) {
1783                         $block = $this->special->skin->commentBlock( $this->file->description );
1784                 } else {
1785                         $block = ' ' . wfMsgHtml( 'rev-deleted-comment' );
1786                 }
1787                 if( $this->file->isDeleted( File::DELETED_COMMENT ) ) {
1788                         return "<span class=\"history-deleted\">$block</span>";
1789                 }
1790                 return $block;
1791         }
1792
1793         public function getHTML() {
1794                 global $wgLang;
1795                 $data =
1796                         wfMsg(
1797                                 'widthheight',
1798                                 $wgLang->formatNum( $this->file->getWidth() ),
1799                                 $wgLang->formatNum( $this->file->getHeight() )
1800                         ) .
1801                         ' (' .
1802                         wfMsgExt( 'nbytes', 'parsemag', $wgLang->formatNum( $this->file->getSize() ) ) .
1803                         ')';
1804                 $pageLink = $this->getLink();
1805
1806                 return '<li>' . $this->getLink() . ' ' . $this->getUserTools() . ' ' .
1807                         $data . ' ' . $this->getComment(). '</li>';
1808         }
1809 }
1810
1811 /**
1812  * List for filearchive table items
1813  */
1814 class RevDel_ArchivedFileList extends RevDel_FileList {
1815         var $type = 'filearchive';
1816         var $idField = 'fa_id';
1817         var $dateField = 'fa_timestamp';
1818         var $authorIdField = 'fa_user';
1819         var $authorNameField = 'fa_user_text';
1820
1821         public function doQuery( $db ) {
1822                 $ids = array_map( 'intval', $this->ids );
1823                 return $db->select( 'filearchive', '*',
1824                         array(
1825                                 'fa_name' => $this->title->getDBkey(),
1826                                 'fa_id'   => $ids
1827                         ),
1828                         __METHOD__,
1829                         array( 'ORDER BY' => 'fa_id DESC' )
1830                 );
1831         }
1832
1833         public function newItem( $row ) {
1834                 return new RevDel_ArchivedFileItem( $this, $row );
1835         }
1836 }
1837
1838 /**
1839  * Item class for a filearchive table row
1840  */
1841 class RevDel_ArchivedFileItem extends RevDel_FileItem {
1842         public function __construct( $list, $row ) {
1843                 RevDel_Item::__construct( $list, $row );
1844                 $this->file = ArchivedFile::newFromRow( $row );
1845         }
1846
1847         public function getId() {
1848                 return $this->row->fa_id;
1849         }
1850
1851         public function setBits( $bits ) {
1852                 $dbw = wfGetDB( DB_MASTER );
1853                 $dbw->update( 'filearchive',
1854                         array( 'fa_deleted' => $bits ),
1855                         array(
1856                                 'fa_id' => $this->row->fa_id,
1857                                 'fa_deleted' => $this->getBits(),
1858                         ),
1859                         __METHOD__
1860                 );
1861                 return (bool)$dbw->affectedRows();
1862         }
1863
1864         protected function getLink() {
1865                 global $wgLang, $wgUser;
1866                 $date = $wgLang->timeanddate( $this->file->getTimestamp(), true  );
1867                 $undelete = SpecialPage::getTitleFor( 'Undelete' );
1868                 $key = $this->file->getKey();
1869                 # Hidden files...
1870                 if( !$this->canViewContent() ) {
1871                         $link = $date;
1872                 } else {
1873                         $link = $this->special->skin->link( $undelete, $date, array(),
1874                                 array(
1875                                         'target' => $this->list->title->getPrefixedText(),
1876                                         'file' => $key,
1877                                         'token' => $wgUser->editToken( $key )
1878                                 )
1879                         );
1880                 }
1881                 if( $this->isDeleted() ) {
1882                         $link = '<span class="history-deleted">' . $link . '</span>';
1883                 }
1884                 return $link;
1885         }
1886 }
1887
1888 /**
1889  * List for logging table items
1890  */
1891 class RevDel_LogList extends RevDel_List {
1892         var $type = 'logging';
1893         var $idField = 'log_id';
1894         var $dateField = 'log_timestamp';
1895         var $authorIdField = 'log_user';
1896         var $authorNameField = 'log_user_text';
1897
1898         public function doQuery( $db ) {
1899                 global $wgMessageCache;
1900                 $wgMessageCache->loadAllMessages();
1901                 $ids = array_map( 'intval', $this->ids );
1902                 return $db->select( 'logging', '*',
1903                         array( 'log_id' => $ids ),
1904                         __METHOD__,
1905                         array( 'ORDER BY' => 'log_id DESC' )
1906                 );
1907         }
1908
1909         public function newItem( $row ) {
1910                 return new RevDel_LogItem( $this, $row );
1911         }
1912
1913         public function getSuppressBit() {
1914                 return Revision::DELETED_RESTRICTED;
1915         }
1916
1917         public function getLogAction() {
1918                 return 'event';
1919         }
1920
1921         public function getLogParams( $params ) {
1922                 return array(
1923                         implode( ',', $params['ids'] ),
1924                         "ofield={$params['oldBits']}",
1925                         "nfield={$params['newBits']}"
1926                 );
1927         }
1928 }
1929
1930 /**
1931  * Item class for a logging table row
1932  */
1933 class RevDel_LogItem extends RevDel_Item {
1934         public function canView() {
1935                 return LogEventsList::userCan( $this->row, Revision::DELETED_RESTRICTED );
1936         }
1937
1938         public function canViewContent() {
1939                 return true; // none
1940         }
1941
1942         public function getBits() {
1943                 return $this->row->log_deleted;
1944         }
1945
1946         public function setBits( $bits ) {
1947                 $dbw = wfGetDB( DB_MASTER );
1948                 $dbw->update( 'recentchanges',
1949                         array(
1950                                 'rc_deleted' => $bits,
1951                                 'rc_patrolled' => 1
1952                         ),
1953                         array(
1954                                 'rc_logid' => $this->row->log_id,
1955                                 'rc_timestamp' => $this->row->log_timestamp // index
1956                         ),
1957                         __METHOD__
1958                 );
1959                 $dbw->update( 'logging',
1960                         array( 'log_deleted' => $bits ),
1961                         array(
1962                                 'log_id' => $this->row->log_id,
1963                                 'log_deleted' => $this->getBits()
1964                         ),
1965                         __METHOD__
1966                 );
1967                 return (bool)$dbw->affectedRows();
1968         }
1969
1970         public function getHTML() {
1971                 global $wgLang;
1972
1973                 $date = htmlspecialchars( $wgLang->timeanddate( $this->row->log_timestamp ) );
1974                 $paramArray = LogPage::extractParams( $this->row->log_params );
1975                 $title = Title::makeTitle( $this->row->log_namespace, $this->row->log_title );
1976
1977                 // Log link for this page
1978                 $loglink = $this->special->skin->link(
1979                         SpecialPage::getTitleFor( 'Log' ),
1980                         wfMsgHtml( 'log' ),
1981                         array(),
1982                         array( 'page' => $title->getPrefixedText() )
1983                 );
1984                 // Action text
1985                 if( !$this->canView() ) {
1986                         $action = '<span class="history-deleted">' . wfMsgHtml('rev-deleted-event') . '</span>';
1987                 } else {
1988                         $action = LogPage::actionText( $this->row->log_type, $this->row->log_action, $title,
1989                                 $this->special->skin, $paramArray, true, true );
1990                         if( $this->row->log_deleted & LogPage::DELETED_ACTION )
1991                                 $action = '<span class="history-deleted">' . $action . '</span>';
1992                 }
1993                 // User links
1994                 $userLink = $this->special->skin->userLink( $this->row->log_user,
1995                         User::WhoIs( $this->row->log_user ) );
1996                 if( LogEventsList::isDeleted($this->row,LogPage::DELETED_USER) ) {
1997                         $userLink = '<span class="history-deleted">' . $userLink . '</span>';
1998                 }
1999                 // Comment
2000                 $comment = $wgLang->getDirMark() . $this->special->skin->commentBlock( $this->row->log_comment );
2001                 if( LogEventsList::isDeleted($this->row,LogPage::DELETED_COMMENT) ) {
2002                         $comment = '<span class="history-deleted">' . $comment . '</span>';
2003                 }
2004                 return "<li>($loglink) $date $userLink $action $comment</li>";
2005         }
2006 }