includes/specials/SpecialRevisiondelete.php

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