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