includes/specials/SpecialRevisiondelete.php

   1 <?php
   2 /**
   3  *
   4  * This program is free software; you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License as published by
   6  * the Free Software Foundation; either version 2 of the License, or
   7  * (at your option) any later version.
   8  *
   9  * This program is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  12  * GNU General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License along
  15  * with this program; if not, write to the Free Software Foundation, Inc.,
  16  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  17  * http://www.gnu.org/copyleft/gpl.html
  18  */
  19
  20 /**
  21  * Special page allowing users with the appropriate permissions to view
  22  * and hide revisions. Log items can also be hidden.
  23  *
  24  * @file
  25  * @ingroup SpecialPage
  26  */
  27
  28 class SpecialRevisionDelete extends UnlistedSpecialPage {
  29         /** Skin object */
  30         var $skin;
  31
  32         /** True if the submit button was clicked, and the form was posted */
  33         var $submitClicked;
  34
  35         /** Target ID list */
  36         var $ids;
  37
  38         /** Archive name, for reviewing deleted files */
  39         var $archiveName;
  40
  41         /** Edit token for securing image views against XSS */
  42         var $token;
  43
  44         /** Title object for target parameter */
  45         var $targetObj;
  46
  47         /** Deletion type, may be revision, archive, oldimage, filearchive, logging. */
  48         var $typeName;
  49
  50         /** Array of checkbox specs (message, name, deletion bits) */
  51         var $checks;
  52
  53         /** Information about the current type */
  54         var $typeInfo;
  55
  56         /** The RevDel_List object, storing the list of items to be deleted/undeleted */
  57         var $list;
  58
  59         /**
  60          * Assorted information about each type, needed by the special page.
  61          * TODO Move some of this to the list class
  62          */
  63         static $allowedTypes = array(
  64                 'revision' => array(
  65                         'check-label' => 'revdelete-hide-text',
  66                         'deletion-bits' => Revision::DELETED_TEXT,
  67                         'success' => 'revdelete-success',
  68                         'failure' => 'revdelete-failure',
  69                         'list-class' => 'RevDel_RevisionList',
  70                 ),
  71                 'archive' => array(
  72                         'check-label' => 'revdelete-hide-text',
  73                         'deletion-bits' => Revision::DELETED_TEXT,
  74                         'success' => 'revdelete-success',
  75                         'failure' => 'revdelete-failure',
  76                         'list-class' => 'RevDel_ArchiveList',
  77                 ),
  78                 'oldimage'=> array(
  79                         'check-label' => 'revdelete-hide-image',
  80                         'deletion-bits' => File::DELETED_FILE,
  81                         'success' => 'revdelete-success',
  82                         'failure' => 'revdelete-failure',
  83                         'list-class' => 'RevDel_FileList',
  84                 ),
  85                 'filearchive' => array(
  86                         'check-label' => 'revdelete-hide-image',
  87                         'deletion-bits' => File::DELETED_FILE,
  88                         'success' => 'revdelete-success',
  89                         'failure' => 'revdelete-failure',
  90                         'list-class' => 'RevDel_ArchivedFileList',
  91                 ),
  92                 'logging' => array(
  93                         'check-label' => 'revdelete-hide-name',
  94                         'deletion-bits' => LogPage::DELETED_ACTION,
  95                         'success' => 'logdelete-success',
  96                         'failure' => 'logdelete-failure',
  97                         'list-class' => 'RevDel_LogList',
  98                 ),
  99         );
 100
 101         /** Type map to support old log entries */
 102         static $deprecatedTypeMap = array(
 103                 'oldid' => 'revision',
 104                 'artimestamp' => 'archive',
 105                 'oldimage' => 'oldimage',
 106                 'fileid' => 'filearchive',
 107                 'logid' => 'logging',
 108         );
 109
 110         public function __construct() {
 111                 parent::__construct( 'Revisiondelete', 'deletedhistory' );
 112         }
 113
 114         public function execute( $par ) {
 115                 global $wgOut, $wgUser, $wgRequest;
 116                 if( !$wgUser->isAllowed( 'deletedhistory' ) ) {
 117                         $wgOut->permissionRequired( 'deletedhistory' );
 118                         return;
 119                 } else if( wfReadOnly() ) {
 120                         $wgOut->readOnlyPage();
 121                         return;
 122                 }
 123                 $this->mIsAllowed = $wgUser->isAllowed('deleterevision'); // for changes
 124                 $this->skin = $wgUser->getSkin();
 125                 $this->setHeaders();
 126                 $this->outputHeader();
 127                 $this->submitClicked = $wgRequest->wasPosted() && $wgRequest->getBool( 'wpSubmit' );
 128                 # Handle our many different possible input types.
 129                 $ids = $wgRequest->getVal( 'ids' );
 130                 if ( !is_null( $ids ) ) {
 131                         # Allow CSV, for backwards compatibility, or a single ID for show/hide links
 132                         $this->ids = explode( ',', $ids );
 133                 } else {
 134                         # Array input
 135                         $this->ids = array_keys( $wgRequest->getArray('ids',array()) );
 136                 }
 137                 // $this->ids = array_map( 'intval', $this->ids );
 138                 $this->ids = array_unique( array_filter( $this->ids ) );
 139
 140                 if ( $wgRequest->getVal( 'action' ) == 'historysubmit' ) {
 141                         # For show/hide form submission from history page
 142                         $this->targetObj = $GLOBALS['wgTitle'];
 143                         $this->typeName = 'revision';
 144                 } else {
 145                         $this->typeName = $wgRequest->getVal( 'type' );
 146                         $this->targetObj = Title::newFromText( $wgRequest->getText( 'target' ) );
 147                 }
 148
 149                 # For reviewing deleted files...
 150                 $this->archiveName = $wgRequest->getVal( 'file' );
 151                 $this->token = $wgRequest->getVal( 'token' );
 152                 if ( $this->archiveName && $this->targetObj ) {
 153                         $this->tryShowFile( $this->archiveName );
 154                         return;
 155                 }
 156
 157                 if ( isset( self::$deprecatedTypeMap[$this->typeName] ) ) {
 158                         $this->typeName = self::$deprecatedTypeMap[$this->typeName];
 159                 }
 160
 161                 # No targets?
 162                 if( !isset( self::$allowedTypes[$this->typeName] ) || count( $this->ids ) == 0 ) {
 163                         $wgOut->showErrorPage( 'revdelete-nooldid-title', 'revdelete-nooldid-text' );
 164                         return;
 165                 }
 166                 $this->typeInfo = self::$allowedTypes[$this->typeName];
 167
 168                 # If we have revisions, get the title from the first one
 169                 # since they should all be from the same page. This allows
 170                 # for more flexibility with page moves...
 171                 if( $this->typeName == 'revision' ) {
 172                         $rev = Revision::newFromId( $this->ids[0] );
 173                         $this->targetObj = $rev ? $rev->getTitle() : $this->targetObj;
 174                 }
 175
 176                 $this->otherReason = $wgRequest->getVal( 'wpReason' );
 177                 # We need a target page!
 178                 if( is_null($this->targetObj) ) {
 179                         $wgOut->addWikiMsg( 'undelete-header' );
 180                         return;
 181                 }
 182                 # Give a link to the logs/hist for this page
 183                 $this->showConvenienceLinks();
 184
 185                 # Initialise checkboxes
 186                 $this->checks = array(
 187                         array( $this->typeInfo['check-label'], 'wpHidePrimary', $this->typeInfo['deletion-bits'] ),
 188                         array( 'revdelete-hide-comment', 'wpHideComment', Revision::DELETED_COMMENT ),
 189                         array( 'revdelete-hide-user', 'wpHideUser', Revision::DELETED_USER )
 190                 );
 191                 if( $wgUser->isAllowed('suppressrevision') ) {
 192                         $this->checks[] = array( 'revdelete-hide-restricted',
 193                                 'wpHideRestricted', Revision::DELETED_RESTRICTED );
 194                 }
 195
 196                 # Either submit or create our form
 197                 if( $this->mIsAllowed && $this->submitClicked ) {
 198                         $this->submit( $wgRequest );
 199                 } else {
 200                         $this->showForm();
 201                 }
 202
 203                 $qc = $this->getLogQueryCond();
 204                 # Show relevant lines from the deletion log
 205                 $wgOut->addHTML( "<h2>" . htmlspecialchars( LogPage::logName( 'delete' ) ) . "</h2>\n" );
 206                 LogEventsList::showLogExtract( $wgOut, 'delete',
 207                         $this->targetObj->getPrefixedText(), '', array( 'lim' => 25, 'conds' => $qc ) );
 208                 # Show relevant lines from the suppression log
 209                 if( $wgUser->isAllowed( 'suppressionlog' ) ) {
 210                         $wgOut->addHTML( "<h2>" . htmlspecialchars( LogPage::logName( 'suppress' ) ) . "</h2>\n" );
 211                         LogEventsList::showLogExtract( $wgOut, 'suppress',
 212                                 $this->targetObj->getPrefixedText(), '', array( 'lim' => 25, 'conds' => $qc ) );
 213                 }
 214         }
 215
 216         /**
 217          * Show some useful links in the subtitle
 218          */
 219         protected function showConvenienceLinks() {
 220                 global $wgOut, $wgUser, $wgLang;
 221                 # Give a link to the logs/hist for this page
 222                 if( $this->targetObj ) {
 223                         $links = array();
 224                         $links[] = $this->skin->linkKnown(
 225                                 SpecialPage::getTitleFor( 'Log' ),
 226                                 wfMsgHtml( 'viewpagelogs' ),
 227                                 array(),
 228                                 array( 'page' => $this->targetObj->getPrefixedText() )
 229                         );
 230                         if ( $this->targetObj->getNamespace() != NS_SPECIAL ) {
 231                                 # Give a link to the page history
 232                                 $links[] = $this->skin->linkKnown(
 233                                         $this->targetObj,
 234                                         wfMsgHtml( 'pagehist' ),
 235                                         array(),
 236                                         array( 'action' => 'history' )
 237                                 );
 238                                 # Link to deleted edits
 239                                 if( $wgUser->isAllowed('undelete') ) {
 240                                         $undelete = SpecialPage::getTitleFor( 'Undelete' );
 241                                         $links[] = $this->skin->linkKnown(
 242                                                 $undelete,
 243                                                 wfMsgHtml( 'deletedhist' ),
 244                                                 array(),
 245                                                 array( 'target' => $this->targetObj->getPrefixedDBkey() )
 246                                         );
 247                                 }
 248                         }
 249                         # Logs themselves don't have histories or archived revisions
 250                         $wgOut->setSubtitle( '<p>' . $wgLang->pipeList( $links ) . '</p>' );
 251                 }
 252         }
 253
 254         /**
 255          * Get the condition used for fetching log snippets
 256          */
 257         protected function getLogQueryCond() {
 258                 $conds = array();
 259                 // Revision delete logs for these item
 260                 $conds['log_type'] = array('delete','suppress');
 261                 $conds['log_action'] = $this->getList()->getLogAction();
 262                 $conds['ls_field'] = RevisionDeleter::getRelationType( $this->typeName );
 263                 $conds['ls_value'] = $this->ids;
 264                 return $conds;
 265         }
 266
 267         /**
 268          * Show a deleted file version requested by the visitor.
 269          * TODO Mostly copied from Special:Undelete. Refactor.
 270          */
 271         protected function tryShowFile( $archiveName ) {
 272                 global $wgOut, $wgRequest, $wgUser, $wgLang;
 273
 274                 $repo = RepoGroup::singleton()->getLocalRepo();
 275                 $oimage = $repo->newFromArchiveName( $this->targetObj, $archiveName );
 276                 $oimage->load();
 277                 // Check if user is allowed to see this file
 278                 if ( !$oimage->exists() ) {
 279                         $wgOut->addWikiMsg( 'revdelete-no-file' );
 280                         return;
 281                 }
 282                 if( !$oimage->userCan(File::DELETED_FILE) ) {
 283                         if( $oimage->isDeleted( File::DELETED_RESTRICTED ) ) {
 284                                 $wgOut->permissionRequired( 'suppressrevision' );
 285                         } else {
 286                                 $wgOut->permissionRequired( 'deletedtext' );
 287                         }
 288                         return;
 289                 }
 290                 if ( !$wgUser->matchEditToken( $this->token, $archiveName ) ) {
 291                         $wgOut->addWikiMsg( 'revdelete-show-file-confirm',
 292                                 $this->targetObj->getText(),
 293                                 $wgLang->date( $oimage->getTimestamp() ),
 294                                 $wgLang->time( $oimage->getTimestamp() ) );
 295                         $wgOut->addHTML(
 296                                 Xml::openElement( 'form', array(
 297                                         'method' => 'POST',
 298                                         'action' => $this->getTitle()->getLocalUrl(
 299                                                 'target=' . urlencode( $oimage->getName() ) .
 300                                                 '&file=' . urlencode( $archiveName ) .
 301                                                 '&token=' . urlencode( $wgUser->editToken( $archiveName ) ) )
 302                                         )
 303                                 ) .
 304                                 Xml::submitButton( wfMsg( 'revdelete-show-file-submit' ) ) .
 305                                 '</form>'
 306                         );
 307                         return;
 308                 }
 309                 $wgOut->disable();
 310                 # We mustn't allow the output to be Squid cached, otherwise
 311                 # if an admin previews a deleted image, and it's cached, then
 312                 # a user without appropriate permissions can toddle off and
 313                 # nab the image, and Squid will serve it
 314                 $wgRequest->response()->header( 'Expires: ' . gmdate( 'D, d M Y H:i:s', 0 ) . ' GMT' );
 315                 $wgRequest->response()->header( 'Cache-Control: no-cache, no-store, max-age=0, must-revalidate' );
 316                 $wgRequest->response()->header( 'Pragma: no-cache' );
 317
 318                 # Stream the file to the client
 319                 global $IP;
 320                 require_once( "$IP/includes/StreamFile.php" );
 321                 $key = $oimage->getStorageKey();
 322                 $path = $repo->getZonePath( 'deleted' ) . '/' . $repo->getDeletedHashPath( $key ) . $key;
 323                 wfStreamFile( $path );
 324         }
 325
 326         /**
 327          * Get the list object for this request
 328          */
 329         protected function getList() {
 330                 if ( is_null( $this->list ) ) {
 331                         $class = $this->typeInfo['list-class'];
 332                         $this->list = new $class( $this, $this->targetObj, $this->ids );
 333                 }
 334                 return $this->list;
 335         }
 336
 337         /**
 338          * Show a list of items that we will operate on, and show a form with checkboxes
 339          * which will allow the user to choose new visibility settings.
 340          */
 341         protected function showForm() {
 342                 global $wgOut, $wgUser, $wgLang;
 343                 $UserAllowed = true;
 344
 345                 if ( $this->typeName == 'logging' ) {
 346                         $wgOut->addWikiMsg( 'logdelete-selected', $wgLang->formatNum( count($this->ids) ) );
 347                 } else {
 348                         $wgOut->addWikiMsg( 'revdelete-selected',
 349                                 $this->targetObj->getPrefixedText(), count( $this->ids ) );
 350                 }
 351
 352                 $wgOut->addHTML( "<ul>" );
 353
 354                 $numRevisions = 0;
 355                 // Live revisions...
 356                 $list = $this->getList();
 357                 for ( $list->reset(); $list->current(); $list->next() ) {
 358                         $item = $list->current();
 359                         if ( !$item->canView() ) {
 360                                 if( !$this->submitClicked ) {
 361                                         $wgOut->permissionRequired( 'suppressrevision' );
 362                                         return;
 363                                 }
 364                                 $UserAllowed = false;
 365                         }
 366                         $numRevisions++;
 367                         $wgOut->addHTML( $item->getHTML() );
 368                 }
 369
 370                 if( !$numRevisions ) {
 371                         $wgOut->showErrorPage( 'revdelete-nooldid-title', 'revdelete-nooldid-text' );
 372                         return;
 373                 }
 374
 375                 $wgOut->addHTML( "</ul>" );
 376                 // Explanation text
 377                 $this->addUsageText();
 378
 379                 // Normal sysops can always see what they did, but can't always change it
 380                 if( !$UserAllowed ) return;
 381
 382                 // Show form if the user can submit
 383                 if( $this->mIsAllowed ) {
 384                         $out = Xml::openElement( 'form', array( 'method' => 'post',
 385                                         'action' => $this->getTitle()->getLocalUrl( array( 'action' => 'submit' ) ),
 386                                         'id' => 'mw-revdel-form-revisions' ) ) .
 387                                 Xml::fieldset( wfMsg( 'revdelete-legend' ) ) .
 388                                 $this->buildCheckBoxes() .
 389                                 Xml::openElement( 'table' ) .
 390                                 "<tr>\n" .
 391                                         '<td class="mw-label">' .
 392                                                 Xml::label( wfMsg( 'revdelete-log' ), 'wpRevDeleteReasonList' ) .
 393                                         '</td>' .
 394                                         '<td class="mw-input">' .
 395                                                 Xml::listDropDown( 'wpRevDeleteReasonList',
 396                                                         wfMsgForContent( 'revdelete-reason-dropdown' ),
 397                                                         wfMsgForContent( 'revdelete-reasonotherlist' ), '', 'wpReasonDropDown', 1
 398                                                 ) .
 399                                         '</td>' .
 400                                 "</tr><tr>\n" .
 401                                         '<td class="mw-label">' .
 402                                                 Xml::label( wfMsg( 'revdelete-otherreason' ), 'wpReason' ) .
 403                                         '</td>' .
 404                                         '<td class="mw-input">' .
 405                                                 Xml::input( 'wpReason', 60, $this->otherReason, array( 'id' => 'wpReason' ) ) .
 406                                         '</td>' .
 407                                 "</tr><tr>\n" .
 408                                         '<td></td>' .
 409                                         '<td class="mw-submit">' .
 410                                                 Xml::submitButton( wfMsgExt('revdelete-submit','parsemag',$numRevisions),
 411                                                         array( 'name' => 'wpSubmit' ) ) .
 412                                         '</td>' .
 413                                 "</tr>\n" .
 414                                 Xml::closeElement( 'table' ) .
 415                                 Xml::hidden( 'wpEditToken', $wgUser->editToken() ) .
 416                                 Xml::hidden( 'target', $this->targetObj->getPrefixedText() ) .
 417                                 Xml::hidden( 'type', $this->typeName ) .
 418                                 Xml::hidden( 'ids', implode( ',', $this->ids ) ) .
 419                                 Xml::closeElement( 'fieldset' ) . "\n";
 420                 } else {
 421                         $out = '';
 422                 }
 423                 if( $this->mIsAllowed ) {
 424                         $out .= Xml::closeElement( 'form' ) . "\n";
 425                         // Show link to edit the dropdown reasons
 426                         if( $wgUser->isAllowed( 'editinterface' ) ) {
 427                                 $title = Title::makeTitle( NS_MEDIAWIKI, 'revdelete-reason-dropdown' );
 428                                 $link = $wgUser->getSkin()->link(
 429                                         $title,
 430                                         wfMsgHtml( 'revdelete-edit-reasonlist' ),
 431                                         array(),
 432                                         array( 'action' => 'edit' )
 433                                 );
 434                                 $out .= Xml::tags( 'p', array( 'class' => 'mw-revdel-editreasons' ), $link ) . "\n";
 435                         }
 436                 }
 437                 $wgOut->addHTML( $out );
 438         }
 439
 440         /**
 441          * Show some introductory text
 442          * FIXME Wikimedia-specific policy text
 443          */
 444         protected function addUsageText() {
 445                 global $wgOut, $wgUser;
 446                 $wgOut->addWikiMsg( 'revdelete-text' );
 447                 if( $wgUser->isAllowed( 'suppressrevision' ) ) {
 448                         $wgOut->addWikiMsg( 'revdelete-suppress-text' );
 449                 }
 450                 if( $this->mIsAllowed ) {
 451                         $wgOut->addWikiMsg( 'revdelete-confirm' );
 452                 }
 453         }
 454
 455         /**
 456         * @return String: HTML
 457         */
 458         protected function buildCheckBoxes() {
 459                 global $wgRequest;
 460
 461                 $html = '<table>';
 462                 // If there is just one item, use checkboxes
 463                 $list = $this->getList();
 464                 if( $list->length() == 1 ) {
 465                         $list->reset();
 466                         $bitfield = $list->current()->getBits(); // existing field
 467                         if( $this->submitClicked ) {
 468                                 $bitfield = $this->extractBitfield( $this->extractBitParams($wgRequest), $bitfield );
 469                         }
 470                         foreach( $this->checks as $item ) {
 471                                 list( $message, $name, $field ) = $item;
 472                                 $innerHTML = Xml::checkLabel( wfMsg($message), $name, $name, $bitfield & $field );
 473                                 if( $field == Revision::DELETED_RESTRICTED )
 474                                         $innerHTML = "<b>$innerHTML</b>";
 475                                 $line = Xml::tags( 'td', array( 'class' => 'mw-input' ), $innerHTML );
 476                                 $html .= "<tr>$line</tr>\n";
 477                         }
 478                 // Otherwise, use tri-state radios
 479                 } else {
 480                         $html .= '<tr>';
 481                         $html .= '<th class="mw-revdel-checkbox">'.wfMsgHtml('revdelete-radio-same').'</th>';
 482                         $html .= '<th class="mw-revdel-checkbox">'.wfMsgHtml('revdelete-radio-unset').'</th>';
 483                         $html .= '<th class="mw-revdel-checkbox">'.wfMsgHtml('revdelete-radio-set').'</th>';
 484                         $html .= "<th></th></tr>\n";
 485                         foreach( $this->checks as $item ) {
 486                                 list( $message, $name, $field ) = $item;
 487                                 // If there are several items, use third state by default...
 488                                 if( $this->submitClicked ) {
 489                                         $selected = $wgRequest->getInt( $name, 0 /* unchecked */ );
 490                                 } else {
 491                                         $selected = -1; // use existing field
 492                                 }
 493                                 $line = '<td class="mw-revdel-checkbox">' . Xml::radio( $name, -1, $selected == -1 ) . '</td>';
 494                                 $line .= '<td class="mw-revdel-checkbox">' . Xml::radio( $name, 0, $selected == 0 ) . '</td>';
 495                                 $line .= '<td class="mw-revdel-checkbox">' . Xml::radio( $name, 1, $selected == 1 ) . '</td>';
 496                                 $label = wfMsgHtml($message);
 497                                 if( $field == Revision::DELETED_RESTRICTED ) {
 498                                         $label = "<b>$label</b>";
 499                                 }
 500                                 $line .= "<td>$label</td>";
 501                                 $html .= "<tr>$line</tr>\n";
 502                         }
 503                 }
 504
 505                 $html .= '</table>';
 506                 return $html;
 507         }
 508
 509         /**
 510          * UI entry point for form submission.
 511          * @param $request WebRequest
 512          */
 513         protected function submit( $request ) {
 514                 global $wgUser, $wgOut;
 515                 # Check edit token on submission
 516                 if( $this->submitClicked && !$wgUser->matchEditToken( $request->getVal('wpEditToken') ) ) {
 517                         $wgOut->addWikiMsg( 'sessionfailure' );
 518                         return false;
 519                 }
 520                 $bitParams = $this->extractBitParams( $request );
 521                 $listReason = $request->getText( 'wpRevDeleteReasonList', 'other' ); // from dropdown
 522                 $comment = $listReason;
 523                 if( $comment != 'other' && $this->otherReason != '' ) {
 524                         // Entry from drop down menu + additional comment
 525                         $comment .= wfMsgForContent( 'colon-separator' ) . $this->otherReason;
 526                 } elseif( $comment == 'other' ) {
 527                         $comment = $this->otherReason;
 528                 }
 529                 # Can the user set this field?
 530                 if( $bitParams[Revision::DELETED_RESTRICTED]==1 && !$wgUser->isAllowed('suppressrevision') ) {
 531                         $wgOut->permissionRequired( 'suppressrevision' );
 532                         return false;
 533                 }
 534                 # If the save went through, go to success message...
 535                 $status = $this->save( $bitParams, $comment, $this->targetObj );
 536                 if ( $status->isGood() ) {
 537                         $this->success();
 538                         return true;
 539                 # ...otherwise, bounce back to form...
 540                 } else {
 541                         $this->failure( $status );
 542                 }
 543                 return false;
 544         }
 545
 546         /**
 547          * Report that the submit operation succeeded
 548          */
 549         protected function success() {
 550                 global $wgOut;
 551                 $wgOut->setPagetitle( wfMsg( 'actioncomplete' ) );
 552                 $wgOut->wrapWikiMsg( "<span class=\"success\">\n$1\n</span>", $this->typeInfo['success'] );
 553                 $this->list->reloadFromMaster();
 554                 $this->showForm();
 555         }
 556
 557         /**
 558          * Report that the submit operation failed
 559          */
 560         protected function failure( $status ) {
 561                 global $wgOut;
 562                 $wgOut->setPagetitle( wfMsg( 'actionfailed' ) );
 563                 $wgOut->addWikiText( $status->getWikiText( $this->typeInfo['failure'] ) );
 564                 $this->showForm();
 565         }
 566
 567         /**
 568          * Put together an array that contains -1, 0, or the *_deleted const for each bit
 569          * @param $request WebRequest
 570          * @return array
 571          */
 572         protected function extractBitParams( $request ) {
 573                 $bitfield = array();
 574                 foreach( $this->checks as $item ) {
 575                         list( /* message */ , $name, $field ) = $item;
 576                         $val = $request->getInt( $name, 0 /* unchecked */ );
 577                         if( $val < -1 || $val > 1) {
 578                                 $val = -1; // -1 for existing value
 579                         }
 580                         $bitfield[$field] = $val;
 581                 }
 582                 if( !isset($bitfield[Revision::DELETED_RESTRICTED]) ) {
 583                         $bitfield[Revision::DELETED_RESTRICTED] = 0;
 584                 }
 585                 return $bitfield;
 586         }
 587
 588         /**
 589          * Put together a rev_deleted bitfield
 590          * @param $bitPars array extractBitParams() params
 591          * @param $oldfield int current bitfield
 592          * @return array
 593          */
 594         public static function extractBitfield( $bitPars, $oldfield ) {
 595                 // Build the actual new rev_deleted bitfield
 596                 $newBits = 0;
 597                 foreach( $bitPars as $const => $val ) {
 598                         if( $val == 1 ) {
 599                                 $newBits |= $const; // $const is the *_deleted const
 600                         } else if( $val == -1 ) {
 601                                 $newBits |= ($oldfield & $const); // use existing
 602                         }
 603                 }
 604                 return $newBits;
 605         }
 606
 607         /**
 608          * Do the write operations. Simple wrapper for RevDel_*List::setVisibility().
 609          */
 610         protected function save( $bitfield, $reason, $title ) {
 611                 return $this->getList()->setVisibility(
 612                         array( 'value' => $bitfield, 'comment' => $reason )
 613                 );
 614         }
 615 }
 616