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   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      /** @var bool Was the DB modified in this request */
  32      protected $wasSaved = false;
  33  
  34      /** @var bool True if the submit button was clicked, and the form was posted */
  35      private $submitClicked;
  36  
  37      /** @var array Target ID list */
  38      private $ids;
  39  
  40      /** @var string Archive name, for reviewing deleted files */
  41      private $archiveName;
  42  
  43      /** @var string Edit token for securing image views against XSS */
  44      private $token;
  45  
  46      /** @var Title Title object for target parameter */
  47      private $targetObj;
  48  
  49      /** @var string Deletion type, may be revision, archive, oldimage, filearchive, logging. */
  50      private $typeName;
  51  
  52      /** @var array Array of checkbox specs (message, name, deletion bits) */
  53      private $checks;
  54  
  55      /** @var array UI Labels about the current type */
  56      private $typeLabels;
  57  
  58      /** @var RevDelList RevDelList object, storing the list of items to be deleted/undeleted */
  59      private $revDelList;
  60  
  61      /** @var bool Whether user is allowed to perform the action */
  62      private $mIsAllowed;
  63  
  64      /** @var string */
  65      private $otherReason;
  66  
  67      /**
  68       * UI labels for each type.
  69       */
  70      private static $UILabels = array(
  71          'revision' => array(
  72              'check-label' => 'revdelete-hide-text',
  73              'success' => 'revdelete-success',
  74              'failure' => 'revdelete-failure',
  75              'text' => 'revdelete-text-text',
  76              'selected'=> 'revdelete-selected-text',
  77          ),
  78          'archive' => array(
  79              'check-label' => 'revdelete-hide-text',
  80              'success' => 'revdelete-success',
  81              'failure' => 'revdelete-failure',
  82              'text' => 'revdelete-text-text',
  83              'selected'=> 'revdelete-selected-text',
  84          ),
  85          'oldimage' => array(
  86              'check-label' => 'revdelete-hide-image',
  87              'success' => 'revdelete-success',
  88              'failure' => 'revdelete-failure',
  89              'text' => 'revdelete-text-file',
  90              'selected'=> 'revdelete-selected-file',
  91          ),
  92          'filearchive' => array(
  93              'check-label' => 'revdelete-hide-image',
  94              'success' => 'revdelete-success',
  95              'failure' => 'revdelete-failure',
  96              'text' => 'revdelete-text-file',
  97              'selected'=> 'revdelete-selected-file',
  98          ),
  99          'logging' => array(
 100              'check-label' => 'revdelete-hide-name',
 101              'success' => 'logdelete-success',
 102              'failure' => 'logdelete-failure',
 103              'text' => 'logdelete-text',
 104              'selected' => 'logdelete-selected',
 105          ),
 106      );
 107  
 108  	public function __construct() {
 109          parent::__construct( 'Revisiondelete', 'deletedhistory' );
 110      }
 111  
 112  	public function execute( $par ) {
 113          $this->checkPermissions();
 114          $this->checkReadOnly();
 115  
 116          $output = $this->getOutput();
 117          $user = $this->getUser();
 118  
 119          $this->setHeaders();
 120          $this->outputHeader();
 121          $request = $this->getRequest();
 122          $this->submitClicked = $request->wasPosted() && $request->getBool( 'wpSubmit' );
 123          # Handle our many different possible input types.
 124          $ids = $request->getVal( 'ids' );
 125          if ( !is_null( $ids ) ) {
 126              # Allow CSV, for backwards compatibility, or a single ID for show/hide links
 127              $this->ids = explode( ',', $ids );
 128          } else {
 129              # Array input
 130              $this->ids = array_keys( $request->getArray( 'ids', array() ) );
 131          }
 132          // $this->ids = array_map( 'intval', $this->ids );
 133          $this->ids = array_unique( array_filter( $this->ids ) );
 134  
 135          if ( $request->getVal( 'action' ) == 'historysubmit'
 136              || $request->getVal( 'action' ) == 'revisiondelete'
 137          ) {
 138              // For show/hide form submission from history page
 139              // Since we are access through index.php?title=XXX&action=historysubmit
 140              // getFullTitle() will contain the target title and not our title
 141              $this->targetObj = $this->getFullTitle();
 142              $this->typeName = 'revision';
 143          } else {
 144              $this->typeName = $request->getVal( 'type' );
 145              $this->targetObj = Title::newFromText( $request->getText( 'target' ) );
 146          }
 147  
 148          # For reviewing deleted files...
 149          $this->archiveName = $request->getVal( 'file' );
 150          $this->token = $request->getVal( 'token' );
 151          if ( $this->archiveName && $this->targetObj ) {
 152              $this->tryShowFile( $this->archiveName );
 153  
 154              return;
 155          }
 156  
 157          $this->typeName = RevisionDeleter::getCanonicalTypeName( $this->typeName );
 158  
 159          # No targets?
 160          if ( !$this->typeName || count( $this->ids ) == 0 ) {
 161              throw new ErrorPageError( 'revdelete-nooldid-title', 'revdelete-nooldid-text' );
 162          }
 163  
 164          # Allow the list type to adjust the passed target
 165          $this->targetObj = RevisionDeleter::suggestTarget(
 166              $this->typeName,
 167              $this->targetObj,
 168              $this->ids
 169          );
 170  
 171          $this->typeLabels = self::$UILabels[$this->typeName];
 172          $list = $this->getList();
 173          $list->reset();
 174          $bitfield = $list->current()->getBits();
 175          $this->mIsAllowed = $user->isAllowed( RevisionDeleter::getRestriction( $this->typeName ) );
 176          $canViewSuppressedOnly = $this->getUser()->isAllowed( 'viewsuppressed' ) &&
 177              !$this->getUser()->isAllowed( 'suppressrevision' );
 178          $pageIsSuppressed = $bitfield & Revision::DELETED_RESTRICTED;
 179          $this->mIsAllowed = $this->mIsAllowed && !( $canViewSuppressedOnly && $pageIsSuppressed );
 180  
 181          $this->otherReason = $request->getVal( 'wpReason' );
 182          # We need a target page!
 183          if ( is_null( $this->targetObj ) ) {
 184              $output->addWikiMsg( 'undelete-header' );
 185  
 186              return;
 187          }
 188          # Give a link to the logs/hist for this page
 189          $this->showConvenienceLinks();
 190  
 191          # Initialise checkboxes
 192          $this->checks = array(
 193              # Messages: revdelete-hide-text, revdelete-hide-image, revdelete-hide-name
 194              array( $this->typeLabels['check-label'], 'wpHidePrimary',
 195                  RevisionDeleter::getRevdelConstant( $this->typeName )
 196              ),
 197              array( 'revdelete-hide-comment', 'wpHideComment', Revision::DELETED_COMMENT ),
 198              array( 'revdelete-hide-user', 'wpHideUser', Revision::DELETED_USER )
 199          );
 200          if ( $user->isAllowed( 'suppressrevision' ) ) {
 201              $this->checks[] = array( 'revdelete-hide-restricted',
 202                  'wpHideRestricted', Revision::DELETED_RESTRICTED );
 203          }
 204  
 205          # Either submit or create our form
 206          if ( $this->mIsAllowed && $this->submitClicked ) {
 207              $this->submit( $request );
 208          } else {
 209              $this->showForm();
 210          }
 211  
 212          $qc = $this->getLogQueryCond();
 213          # Show relevant lines from the deletion log
 214          $deleteLogPage = new LogPage( 'delete' );
 215          $output->addHTML( "<h2>" . $deleteLogPage->getName()->escaped() . "</h2>\n" );
 216          LogEventsList::showLogExtract(
 217              $output,
 218              'delete',
 219              $this->targetObj,
 220              '', /* user */
 221              array( 'lim' => 25, 'conds' => $qc, 'useMaster' => $this->wasSaved )
 222          );
 223          # Show relevant lines from the suppression log
 224          if ( $user->isAllowed( 'suppressionlog' ) ) {
 225              $suppressLogPage = new LogPage( 'suppress' );
 226              $output->addHTML( "<h2>" . $suppressLogPage->getName()->escaped() . "</h2>\n" );
 227              LogEventsList::showLogExtract(
 228                  $output,
 229                  'suppress',
 230                  $this->targetObj,
 231                  '',
 232                  array( 'lim' => 25, 'conds' => $qc, 'useMaster' => $this->wasSaved )
 233              );
 234          }
 235      }
 236  
 237      /**
 238       * Show some useful links in the subtitle
 239       */
 240  	protected function showConvenienceLinks() {
 241          # Give a link to the logs/hist for this page
 242          if ( $this->targetObj ) {
 243              // Also set header tabs to be for the target.
 244              $this->getSkin()->setRelevantTitle( $this->targetObj );
 245  
 246              $links = array();
 247              $links[] = Linker::linkKnown(
 248                  SpecialPage::getTitleFor( 'Log' ),
 249                  $this->msg( 'viewpagelogs' )->escaped(),
 250                  array(),
 251                  array( 'page' => $this->targetObj->getPrefixedText() )
 252              );
 253              if ( !$this->targetObj->isSpecialPage() ) {
 254                  # Give a link to the page history
 255                  $links[] = Linker::linkKnown(
 256                      $this->targetObj,
 257                      $this->msg( 'pagehist' )->escaped(),
 258                      array(),
 259                      array( 'action' => 'history' )
 260                  );
 261                  # Link to deleted edits
 262                  if ( $this->getUser()->isAllowed( 'undelete' ) ) {
 263                      $undelete = SpecialPage::getTitleFor( 'Undelete' );
 264                      $links[] = Linker::linkKnown(
 265                          $undelete,
 266                          $this->msg( 'deletedhist' )->escaped(),
 267                          array(),
 268                          array( 'target' => $this->targetObj->getPrefixedDBkey() )
 269                      );
 270                  }
 271              }
 272              # Logs themselves don't have histories or archived revisions
 273              $this->getOutput()->addSubtitle( $this->getLanguage()->pipeList( $links ) );
 274          }
 275      }
 276  
 277      /**
 278       * Get the condition used for fetching log snippets
 279       * @return array
 280       */
 281  	protected function getLogQueryCond() {
 282          $conds = array();
 283          // Revision delete logs for these item
 284          $conds['log_type'] = array( 'delete', 'suppress' );
 285          $conds['log_action'] = $this->getList()->getLogAction();
 286          $conds['ls_field'] = RevisionDeleter::getRelationType( $this->typeName );
 287          $conds['ls_value'] = $this->ids;
 288  
 289          return $conds;
 290      }
 291  
 292      /**
 293       * Show a deleted file version requested by the visitor.
 294       * @todo Mostly copied from Special:Undelete. Refactor.
 295       * @param string $archiveName
 296       */
 297  	protected function tryShowFile( $archiveName ) {
 298          $repo = RepoGroup::singleton()->getLocalRepo();
 299          $oimage = $repo->newFromArchiveName( $this->targetObj, $archiveName );
 300          $oimage->load();
 301          // Check if user is allowed to see this file
 302          if ( !$oimage->exists() ) {
 303              $this->getOutput()->addWikiMsg( 'revdelete-no-file' );
 304  
 305              return;
 306          }
 307          $user = $this->getUser();
 308          if ( !$oimage->userCan( File::DELETED_FILE, $user ) ) {
 309              if ( $oimage->isDeleted( File::DELETED_RESTRICTED ) ) {
 310                  throw new PermissionsError( 'suppressrevision' );
 311              } else {
 312                  throw new PermissionsError( 'deletedtext' );
 313              }
 314          }
 315          if ( !$user->matchEditToken( $this->token, $archiveName ) ) {
 316              $lang = $this->getLanguage();
 317              $this->getOutput()->addWikiMsg( 'revdelete-show-file-confirm',
 318                  $this->targetObj->getText(),
 319                  $lang->userDate( $oimage->getTimestamp(), $user ),
 320                  $lang->userTime( $oimage->getTimestamp(), $user ) );
 321              $this->getOutput()->addHTML(
 322                  Xml::openElement( 'form', array(
 323                      'method' => 'POST',
 324                      'action' => $this->getPageTitle()->getLocalURL( array(
 325                              'target' => $this->targetObj->getPrefixedDBkey(),
 326                              'file' => $archiveName,
 327                              'token' => $user->getEditToken( $archiveName ),
 328                          ) )
 329                      )
 330                  ) .
 331                  Xml::submitButton( $this->msg( 'revdelete-show-file-submit' )->text() ) .
 332                  '</form>'
 333              );
 334  
 335              return;
 336          }
 337          $this->getOutput()->disable();
 338          # We mustn't allow the output to be Squid cached, otherwise
 339          # if an admin previews a deleted image, and it's cached, then
 340          # a user without appropriate permissions can toddle off and
 341          # nab the image, and Squid will serve it
 342          $this->getRequest()->response()->header( 'Expires: ' . gmdate( 'D, d M Y H:i:s', 0 ) . ' GMT' );
 343          $this->getRequest()->response()->header(
 344              'Cache-Control: no-cache, no-store, max-age=0, must-revalidate'
 345          );
 346          $this->getRequest()->response()->header( 'Pragma: no-cache' );
 347  
 348          $key = $oimage->getStorageKey();
 349          $path = $repo->getZonePath( 'deleted' ) . '/' . $repo->getDeletedHashPath( $key ) . $key;
 350          $repo->streamFile( $path );
 351      }
 352  
 353      /**
 354       * Get the list object for this request
 355       * @return RevDelList
 356       */
 357  	protected function getList() {
 358          if ( is_null( $this->revDelList ) ) {
 359              $this->revDelList = RevisionDeleter::createList(
 360                  $this->typeName, $this->getContext(), $this->targetObj, $this->ids
 361              );
 362          }
 363  
 364          return $this->revDelList;
 365      }
 366  
 367      /**
 368       * Show a list of items that we will operate on, and show a form with checkboxes
 369       * which will allow the user to choose new visibility settings.
 370       */
 371  	protected function showForm() {
 372          $userAllowed = true;
 373  
 374          // Messages: revdelete-selected-text, revdelete-selected-file, logdelete-selected
 375          $this->getOutput()->wrapWikiMsg( "<strong>$1</strong>", array( $this->typeLabels['selected'],
 376              $this->getLanguage()->formatNum( count( $this->ids ) ), $this->targetObj->getPrefixedText() ) );
 377  
 378          $this->getOutput()->addHTML( "<ul>" );
 379  
 380          $numRevisions = 0;
 381          // Live revisions...
 382          $list = $this->getList();
 383          // @codingStandardsIgnoreStart Generic.CodeAnalysis.ForLoopWithTestFunctionCall.NotAllowed
 384          for ( $list->reset(); $list->current(); $list->next() ) {
 385              // @codingStandardsIgnoreEnd
 386              $item = $list->current();
 387  
 388              if ( !$item->canView() ) {
 389                  if ( !$this->submitClicked ) {
 390                      throw new PermissionsError( 'suppressrevision' );
 391                  }
 392                  $userAllowed = false;
 393              }
 394  
 395              $numRevisions++;
 396              $this->getOutput()->addHTML( $item->getHTML() );
 397          }
 398  
 399          if ( !$numRevisions ) {
 400              throw new ErrorPageError( 'revdelete-nooldid-title', 'revdelete-nooldid-text' );
 401          }
 402  
 403          $this->getOutput()->addHTML( "</ul>" );
 404          // Explanation text
 405          $this->addUsageText();
 406  
 407          // Normal sysops can always see what they did, but can't always change it
 408          if ( !$userAllowed ) {
 409              return;
 410          }
 411  
 412          // Show form if the user can submit
 413          if ( $this->mIsAllowed ) {
 414              $out = Xml::openElement( 'form', array( 'method' => 'post',
 415                      'action' => $this->getPageTitle()->getLocalURL( array( 'action' => 'submit' ) ),
 416                      'id' => 'mw-revdel-form-revisions' ) ) .
 417                  Xml::fieldset( $this->msg( 'revdelete-legend' )->text() ) .
 418                  $this->buildCheckBoxes() .
 419                  Xml::openElement( 'table' ) .
 420                  "<tr>\n" .
 421                      '<td class="mw-label">' .
 422                          Xml::label( $this->msg( 'revdelete-log' )->text(), 'wpRevDeleteReasonList' ) .
 423                      '</td>' .
 424                      '<td class="mw-input">' .
 425                          Xml::listDropDown( 'wpRevDeleteReasonList',
 426                              $this->msg( 'revdelete-reason-dropdown' )->inContentLanguage()->text(),
 427                              $this->msg( 'revdelete-reasonotherlist' )->inContentLanguage()->text(),
 428                              $this->getRequest()->getText( 'wpRevDeleteReasonList', 'other' ), 'wpReasonDropDown'
 429                          ) .
 430                      '</td>' .
 431                  "</tr><tr>\n" .
 432                      '<td class="mw-label">' .
 433                          Xml::label( $this->msg( 'revdelete-otherreason' )->text(), 'wpReason' ) .
 434                      '</td>' .
 435                      '<td class="mw-input">' .
 436                          Xml::input(
 437                              'wpReason',
 438                              60,
 439                              $this->otherReason,
 440                              array( 'id' => 'wpReason', 'maxlength' => 100 )
 441                          ) .
 442                      '</td>' .
 443                  "</tr><tr>\n" .
 444                      '<td></td>' .
 445                      '<td class="mw-submit">' .
 446                          Xml::submitButton( $this->msg( 'revdelete-submit', $numRevisions )->text(),
 447                              array( 'name' => 'wpSubmit' ) ) .
 448                      '</td>' .
 449                  "</tr>\n" .
 450                  Xml::closeElement( 'table' ) .
 451                  Html::hidden( 'wpEditToken', $this->getUser()->getEditToken() ) .
 452                  Html::hidden( 'target', $this->targetObj->getPrefixedText() ) .
 453                  Html::hidden( 'type', $this->typeName ) .
 454                  Html::hidden( 'ids', implode( ',', $this->ids ) ) .
 455                  Xml::closeElement( 'fieldset' ) . "\n" .
 456                  Xml::closeElement( 'form' ) . "\n";
 457              // Show link to edit the dropdown reasons
 458              if ( $this->getUser()->isAllowed( 'editinterface' ) ) {
 459                  $title = Title::makeTitle( NS_MEDIAWIKI, 'Revdelete-reason-dropdown' );
 460                  $link = Linker::link(
 461                      $title,
 462                      $this->msg( 'revdelete-edit-reasonlist' )->escaped(),
 463                      array(),
 464                      array( 'action' => 'edit' )
 465                  );
 466                  $out .= Xml::tags( 'p', array( 'class' => 'mw-revdel-editreasons' ), $link ) . "\n";
 467              }
 468          } else {
 469              $out = '';
 470          }
 471          $this->getOutput()->addHTML( $out );
 472      }
 473  
 474      /**
 475       * Show some introductory text
 476       * @todo FIXME: Wikimedia-specific policy text
 477       */
 478  	protected function addUsageText() {
 479          // Messages: revdelete-text-text, revdelete-text-file, logdelete-text
 480          $this->getOutput()->wrapWikiMsg(
 481              "<strong>$1</strong>\n$2", $this->typeLabels['text'],
 482              'revdelete-text-others'
 483          );
 484  
 485          if ( $this->getUser()->isAllowed( 'suppressrevision' ) ) {
 486              $this->getOutput()->addWikiMsg( 'revdelete-suppress-text' );
 487          }
 488  
 489          if ( $this->mIsAllowed ) {
 490              $this->getOutput()->addWikiMsg( 'revdelete-confirm' );
 491          }
 492      }
 493  
 494      /**
 495       * @return string HTML
 496       */
 497  	protected function buildCheckBoxes() {
 498          $html = '<table>';
 499          // If there is just one item, use checkboxes
 500          $list = $this->getList();
 501          if ( $list->length() == 1 ) {
 502              $list->reset();
 503              $bitfield = $list->current()->getBits(); // existing field
 504  
 505              if ( $this->submitClicked ) {
 506                  $bitfield = RevisionDeleter::extractBitfield( $this->extractBitParams(), $bitfield );
 507              }
 508  
 509              foreach ( $this->checks as $item ) {
 510                  // Messages: revdelete-hide-text, revdelete-hide-image, revdelete-hide-name,
 511                  // revdelete-hide-comment, revdelete-hide-user, revdelete-hide-restricted
 512                  list( $message, $name, $field ) = $item;
 513                  $innerHTML = Xml::checkLabel(
 514                      $this->msg( $message )->text(),
 515                      $name,
 516                      $name,
 517                      $bitfield & $field
 518                  );
 519  
 520                  if ( $field == Revision::DELETED_RESTRICTED ) {
 521                      $innerHTML = "<b>$innerHTML</b>";
 522                  }
 523  
 524                  $line = Xml::tags( 'td', array( 'class' => 'mw-input' ), $innerHTML );
 525                  $html .= "<tr>$line</tr>\n";
 526              }
 527          } else {
 528              // Otherwise, use tri-state radios
 529              $html .= '<tr>';
 530              $html .= '<th class="mw-revdel-checkbox">'
 531                  . $this->msg( 'revdelete-radio-same' )->escaped() . '</th>';
 532              $html .= '<th class="mw-revdel-checkbox">'
 533                  . $this->msg( 'revdelete-radio-unset' )->escaped() . '</th>';
 534              $html .= '<th class="mw-revdel-checkbox">'
 535                  . $this->msg( 'revdelete-radio-set' )->escaped() . '</th>';
 536              $html .= "<th></th></tr>\n";
 537              foreach ( $this->checks as $item ) {
 538                  // Messages: revdelete-hide-text, revdelete-hide-image, revdelete-hide-name,
 539                  // revdelete-hide-comment, revdelete-hide-user, revdelete-hide-restricted
 540                  list( $message, $name, $field ) = $item;
 541                  // If there are several items, use third state by default...
 542                  if ( $this->submitClicked ) {
 543                      $selected = $this->getRequest()->getInt( $name, 0 /* unchecked */ );
 544                  } else {
 545                      $selected = -1; // use existing field
 546                  }
 547                  $line = '<td class="mw-revdel-checkbox">' . Xml::radio( $name, -1, $selected == -1 ) . '</td>';
 548                  $line .= '<td class="mw-revdel-checkbox">' . Xml::radio( $name, 0, $selected == 0 ) . '</td>';
 549                  $line .= '<td class="mw-revdel-checkbox">' . Xml::radio( $name, 1, $selected == 1 ) . '</td>';
 550                  $label = $this->msg( $message )->escaped();
 551                  if ( $field == Revision::DELETED_RESTRICTED ) {
 552                      $label = "<b>$label</b>";
 553                  }
 554                  $line .= "<td>$label</td>";
 555                  $html .= "<tr>$line</tr>\n";
 556              }
 557          }
 558  
 559          $html .= '</table>';
 560  
 561          return $html;
 562      }
 563  
 564      /**
 565       * UI entry point for form submission.
 566       * @throws PermissionsError
 567       * @return bool
 568       */
 569  	protected function submit() {
 570          # Check edit token on submission
 571          $token = $this->getRequest()->getVal( 'wpEditToken' );
 572          if ( $this->submitClicked && !$this->getUser()->matchEditToken( $token ) ) {
 573              $this->getOutput()->addWikiMsg( 'sessionfailure' );
 574  
 575              return false;
 576          }
 577          $bitParams = $this->extractBitParams();
 578          // from dropdown
 579          $listReason = $this->getRequest()->getText( 'wpRevDeleteReasonList', 'other' );
 580          $comment = $listReason;
 581          if ( $comment === 'other' ) {
 582              $comment = $this->otherReason;
 583          } elseif ( $this->otherReason !== '' ) {
 584              // Entry from drop down menu + additional comment
 585              $comment .= $this->msg( 'colon-separator' )->inContentLanguage()->text()
 586                  . $this->otherReason;
 587          }
 588          # Can the user set this field?
 589          if ( $bitParams[Revision::DELETED_RESTRICTED] == 1
 590              && !$this->getUser()->isAllowed( 'suppressrevision' )
 591          ) {
 592              throw new PermissionsError( 'suppressrevision' );
 593          }
 594          # If the save went through, go to success message...
 595          $status = $this->save( $bitParams, $comment, $this->targetObj );
 596          if ( $status->isGood() ) {
 597              $this->success();
 598  
 599              return true;
 600          } else {
 601              # ...otherwise, bounce back to form...
 602              $this->failure( $status );
 603          }
 604  
 605          return false;
 606      }
 607  
 608      /**
 609       * Report that the submit operation succeeded
 610       */
 611  	protected function success() {
 612          // Messages: revdelete-success, logdelete-success
 613          $this->getOutput()->setPageTitle( $this->msg( 'actioncomplete' ) );
 614          $this->getOutput()->wrapWikiMsg(
 615              "<span class=\"success\">\n$1\n</span>",
 616              $this->typeLabels['success']
 617          );
 618          $this->wasSaved = true;
 619          $this->revDelList->reloadFromMaster();
 620          $this->showForm();
 621      }
 622  
 623      /**
 624       * Report that the submit operation failed
 625       * @param Status $status
 626       */
 627  	protected function failure( $status ) {
 628          // Messages: revdelete-failure, logdelete-failure
 629          $this->getOutput()->setPageTitle( $this->msg( 'actionfailed' ) );
 630          $this->getOutput()->addWikiText( $status->getWikiText( $this->typeLabels['failure'] ) );
 631          $this->showForm();
 632      }
 633  
 634      /**
 635       * Put together an array that contains -1, 0, or the *_deleted const for each bit
 636       *
 637       * @return array
 638       */
 639  	protected function extractBitParams() {
 640          $bitfield = array();
 641          foreach ( $this->checks as $item ) {
 642              list( /* message */, $name, $field ) = $item;
 643              $val = $this->getRequest()->getInt( $name, 0 /* unchecked */ );
 644              if ( $val < -1 || $val > 1 ) {
 645                  $val = -1; // -1 for existing value
 646              }
 647              $bitfield[$field] = $val;
 648          }
 649          if ( !isset( $bitfield[Revision::DELETED_RESTRICTED] ) ) {
 650              $bitfield[Revision::DELETED_RESTRICTED] = 0;
 651          }
 652  
 653          return $bitfield;
 654      }
 655  
 656      /**
 657       * Do the write operations. Simple wrapper for RevDel*List::setVisibility().
 658       * @param int $bitfield
 659       * @param string $reason
 660       * @param Title $title
 661       * @return Status
 662       */
 663  	protected function save( $bitfield, $reason, $title ) {
 664          return $this->getList()->setVisibility(
 665              array( 'value' => $bitfield, 'comment' => $reason )
 666          );
 667      }
 668  
 669  	protected function getGroupName() {
 670          return 'pagetools';
 671      }
 672  }