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                 $this->checkPermissions();
 115                 $this->checkReadOnly();
 116
 117                 $output = $this->getOutput();
 118                 $user = $this->getUser();
 119
 120                 $this->mIsAllowed = $user->isAllowed('deleterevision'); // for changes
 121                 $this->setHeaders();
 122                 $this->outputHeader();
 123                 $request = $this->getRequest();
 124                 $this->submitClicked = $request->wasPosted() && $request->getBool( 'wpSubmit' );
 125                 # Handle our many different possible input types.
 126                 $ids = $request->getVal( 'ids' );
 127                 if ( !is_null( $ids ) ) {
 128                         # Allow CSV, for backwards compatibility, or a single ID for show/hide links
 129                         $this->ids = explode( ',', $ids );
 130                 } else {
 131                         # Array input
 132                         $this->ids = array_keys( $request->getArray('ids',array()) );
 133                 }
 134                 // $this->ids = array_map( 'intval', $this->ids );
 135                 $this->ids = array_unique( array_filter( $this->ids ) );
 136
 137                 if ( $request->getVal( 'action' ) == 'historysubmit' ) {
 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( $this->archiveName );
 153                         return;
 154                 }
 155
 156                 if ( isset( self::$deprecatedTypeMap[$this->typeName] ) ) {
 157                         $this->typeName = self::$deprecatedTypeMap[$this->typeName];
 158                 }
 159
 160                 # No targets?
 161                 if( !isset( self::$allowedTypes[$this->typeName] ) || count( $this->ids ) == 0 ) {
 162                         $output->showErrorPage( 'revdelete-nooldid-title', 'revdelete-nooldid-text' );
 163                         return;
 164                 }
 165                 $this->typeInfo = self::$allowedTypes[$this->typeName];
 166
 167                 # If we have revisions, get the title from the first one
 168                 # since they should all be from the same page. This allows
 169                 # for more flexibility with page moves...
 170                 if( $this->typeName == 'revision' ) {
 171                         $rev = Revision::newFromId( $this->ids[0] );
 172                         $this->targetObj = $rev ? $rev->getTitle() : $this->targetObj;
 173                 }
 174
 175                 $this->otherReason = $request->getVal( 'wpReason' );
 176                 # We need a target page!
 177                 if( is_null($this->targetObj) ) {
 178                         $output->addWikiMsg( 'undelete-header' );
 179                         return;
 180                 }
 181                 # Give a link to the logs/hist for this page
 182                 $this->showConvenienceLinks();
 183
 184                 # Initialise checkboxes
 185                 $this->checks = array(
 186                         array( $this->typeInfo['check-label'], 'wpHidePrimary', $this->typeInfo['deletion-bits'] ),
 187                         array( 'revdelete-hide-comment', 'wpHideComment', Revision::DELETED_COMMENT ),
 188                         array( 'revdelete-hide-user', 'wpHideUser', Revision::DELETED_USER )
 189                 );
 190                 if( $user->isAllowed('suppressrevision') ) {
 191                         $this->checks[] = array( 'revdelete-hide-restricted',
 192                                 'wpHideRestricted', Revision::DELETED_RESTRICTED );
 193                 }
 194
 195                 # Either submit or create our form
 196                 if( $this->mIsAllowed && $this->submitClicked ) {
 197                         $this->submit( $request );
 198                 } else {
 199                         $this->showForm();
 200                 }
 201
 202                 $qc = $this->getLogQueryCond();
 203                 # Show relevant lines from the deletion log
 204                 $output->addHTML( "<h2>" . htmlspecialchars( LogPage::getName( 'delete' ) ) . "</h2>\n" );
 205                 LogEventsList::showLogExtract( $output, 'delete',
 206                         $this->targetObj, '', array( 'lim' => 25, 'conds' => $qc ) );
 207                 # Show relevant lines from the suppression log
 208                 if( $user->isAllowed( 'suppressionlog' ) ) {
 209                         $output->addHTML( "<h2>" . htmlspecialchars( LogPage::getName( 'suppress' ) ) . "</h2>\n" );
 210                         LogEventsList::showLogExtract( $output, 'suppress',
 211                                 $this->targetObj, '', array( 'lim' => 25, 'conds' => $qc ) );
 212                 }
 213         }
 214
 215         /**
 216          * Show some useful links in the subtitle
 217          */
 218         protected function showConvenienceLinks() {
 219                 # Give a link to the logs/hist for this page
 220                 if( $this->targetObj ) {
 221                         $links = array();
 222                         $links[] = Linker::linkKnown(
 223                                 SpecialPage::getTitleFor( 'Log' ),
 224                                 wfMsgHtml( 'viewpagelogs' ),
 225                                 array(),
 226                                 array( 'page' => $this->targetObj->getPrefixedText() )
 227                         );
 228                         if ( !$this->targetObj->isSpecialPage() ) {
 229                                 # Give a link to the page history
 230                                 $links[] = Linker::linkKnown(
 231                                         $this->targetObj,
 232                                         wfMsgHtml( 'pagehist' ),
 233                                         array(),
 234                                         array( 'action' => 'history' )
 235                                 );
 236                                 # Link to deleted edits
 237                                 if( $this->getUser()->isAllowed('undelete') ) {
 238                                         $undelete = SpecialPage::getTitleFor( 'Undelete' );
 239                                         $links[] = Linker::linkKnown(
 240                                                 $undelete,
 241                                                 wfMsgHtml( 'deletedhist' ),
 242                                                 array(),
 243                                                 array( 'target' => $this->targetObj->getPrefixedDBkey() )
 244                                         );
 245                                 }
 246                         }
 247                         # Logs themselves don't have histories or archived revisions
 248                         $this->getOutput()->addSubtitle( $this->getLanguage()->pipeList( $links ) );
 249                 }
 250         }
 251
 252         /**
 253          * Get the condition used for fetching log snippets
 254          */
 255         protected function getLogQueryCond() {
 256                 $conds = array();
 257                 // Revision delete logs for these item
 258                 $conds['log_type'] = array( 'delete', 'suppress' );
 259                 $conds['log_action'] = $this->getList()->getLogAction();
 260                 $conds['ls_field'] = RevisionDeleter::getRelationType( $this->typeName );
 261                 $conds['ls_value'] = $this->ids;
 262                 return $conds;
 263         }
 264
 265         /**
 266          * Show a deleted file version requested by the visitor.
 267          * TODO Mostly copied from Special:Undelete. Refactor.
 268          */
 269         protected function tryShowFile( $archiveName ) {
 270                 $repo = RepoGroup::singleton()->getLocalRepo();
 271                 $oimage = $repo->newFromArchiveName( $this->targetObj, $archiveName );
 272                 $oimage->load();
 273                 // Check if user is allowed to see this file
 274                 if ( !$oimage->exists() ) {
 275                         $this->getOutput()->addWikiMsg( 'revdelete-no-file' );
 276                         return;
 277                 }
 278                 if( !$oimage->userCan( File::DELETED_FILE, $this->getUser() ) ) {
 279                         if( $oimage->isDeleted( File::DELETED_RESTRICTED ) ) {
 280                                 $this->getOutput()->permissionRequired( 'suppressrevision' );
 281                         } else {
 282                                 $this->getOutput()->permissionRequired( 'deletedtext' );
 283                         }
 284                         return;
 285                 }
 286                 if ( !$this->getUser()->matchEditToken( $this->token, $archiveName ) ) {
 287                         $this->getOutput()->addWikiMsg( 'revdelete-show-file-confirm',
 288                                 $this->targetObj->getText(),
 289                                 $this->getLanguage()->date( $oimage->getTimestamp() ),
 290                                 $this->getLanguage()->time( $oimage->getTimestamp() ) );
 291                         $this->getOutput()->addHTML(
 292                                 Xml::openElement( 'form', array(
 293                                         'method' => 'POST',
 294                                         'action' => $this->getTitle()->getLocalUrl(
 295                                                 'target=' . urlencode( $oimage->getName() ) .
 296                                                 '&file=' . urlencode( $archiveName ) .
 297                                                 '&token=' . urlencode( $this->getUser()->getEditToken( $archiveName ) ) )
 298                                         )
 299                                 ) .
 300                                 Xml::submitButton( wfMsg( 'revdelete-show-file-submit' ) ) .
 301                                 '</form>'
 302                         );
 303                         return;
 304                 }
 305                 $this->getOutput()->disable();
 306                 # We mustn't allow the output to be Squid cached, otherwise
 307                 # if an admin previews a deleted image, and it's cached, then
 308                 # a user without appropriate permissions can toddle off and
 309                 # nab the image, and Squid will serve it
 310                 $this->getRequest()->response()->header( 'Expires: ' . gmdate( 'D, d M Y H:i:s', 0 ) . ' GMT' );
 311                 $this->getRequest()->response()->header( 'Cache-Control: no-cache, no-store, max-age=0, must-revalidate' );
 312                 $this->getRequest()->response()->header( 'Pragma: no-cache' );
 313
 314                 $key = $oimage->getStorageKey();
 315                 $path = $repo->getZonePath( 'deleted' ) . '/' . $repo->getDeletedHashPath( $key ) . $key;
 316                 StreamFile::stream( $path );
 317         }
 318
 319         /**
 320          * Get the list object for this request
 321          */
 322         protected function getList() {
 323                 if ( is_null( $this->list ) ) {
 324                         $class = $this->typeInfo['list-class'];
 325                         $this->list = new $class( $this->getContext(), $this->targetObj, $this->ids );
 326                 }
 327                 return $this->list;
 328         }
 329
 330         /**
 331          * Show a list of items that we will operate on, and show a form with checkboxes
 332          * which will allow the user to choose new visibility settings.
 333          */
 334         protected function showForm() {
 335                 $UserAllowed = true;
 336
 337                 if ( $this->typeName == 'logging' ) {
 338                         $this->getOutput()->addWikiMsg( 'logdelete-selected', $this->getLanguage()->formatNum( count($this->ids) ) );
 339                 } else {
 340                         $this->getOutput()->addWikiMsg( 'revdelete-selected',
 341                                 $this->targetObj->getPrefixedText(), count( $this->ids ) );
 342                 }
 343
 344                 $this->getOutput()->addHTML( "<ul>" );
 345
 346                 $numRevisions = 0;
 347                 // Live revisions...
 348                 $list = $this->getList();
 349                 for ( $list->reset(); $list->current(); $list->next() ) {
 350                         $item = $list->current();
 351                         if ( !$item->canView() ) {
 352                                 if( !$this->submitClicked ) {
 353                                         $this->getOutput()->permissionRequired( 'suppressrevision' );
 354                                         return;
 355                                 }
 356                                 $UserAllowed = false;
 357                         }
 358                         $numRevisions++;
 359                         $this->getOutput()->addHTML( $item->getHTML() );
 360                 }
 361
 362                 if( !$numRevisions ) {
 363                         $this->getOutput()->showErrorPage( 'revdelete-nooldid-title', 'revdelete-nooldid-text' );
 364                         return;
 365                 }
 366
 367                 $this->getOutput()->addHTML( "</ul>" );
 368                 // Explanation text
 369                 $this->addUsageText();
 370
 371                 // Normal sysops can always see what they did, but can't always change it
 372                 if( !$UserAllowed ) return;
 373
 374                 // Show form if the user can submit
 375                 if( $this->mIsAllowed ) {
 376                         $out = Xml::openElement( 'form', array( 'method' => 'post',
 377                                         'action' => $this->getTitle()->getLocalUrl( array( 'action' => 'submit' ) ),
 378                                         'id' => 'mw-revdel-form-revisions' ) ) .
 379                                 Xml::fieldset( wfMsg( 'revdelete-legend' ) ) .
 380                                 $this->buildCheckBoxes() .
 381                                 Xml::openElement( 'table' ) .
 382                                 "<tr>\n" .
 383                                         '<td class="mw-label">' .
 384                                                 Xml::label( wfMsg( 'revdelete-log' ), 'wpRevDeleteReasonList' ) .
 385                                         '</td>' .
 386                                         '<td class="mw-input">' .
 387                                                 Xml::listDropDown( 'wpRevDeleteReasonList',
 388                                                         wfMsgForContent( 'revdelete-reason-dropdown' ),
 389                                                         wfMsgForContent( 'revdelete-reasonotherlist' ), '', 'wpReasonDropDown', 1
 390                                                 ) .
 391                                         '</td>' .
 392                                 "</tr><tr>\n" .
 393                                         '<td class="mw-label">' .
 394                                                 Xml::label( wfMsg( 'revdelete-otherreason' ), 'wpReason' ) .
 395                                         '</td>' .
 396                                         '<td class="mw-input">' .
 397                                                 Xml::input( 'wpReason', 60, $this->otherReason, array( 'id' => 'wpReason', 'maxlength' => 100 ) ) .
 398                                         '</td>' .
 399                                 "</tr><tr>\n" .
 400                                         '<td></td>' .
 401                                         '<td class="mw-submit">' .
 402                                                 Xml::submitButton( wfMsgExt('revdelete-submit','parsemag',$numRevisions),
 403                                                         array( 'name' => 'wpSubmit' ) ) .
 404                                         '</td>' .
 405                                 "</tr>\n" .
 406                                 Xml::closeElement( 'table' ) .
 407                                 Html::hidden( 'wpEditToken', $this->getUser()->getEditToken() ) .
 408                                 Html::hidden( 'target', $this->targetObj->getPrefixedText() ) .
 409                                 Html::hidden( 'type', $this->typeName ) .
 410                                 Html::hidden( 'ids', implode( ',', $this->ids ) ) .
 411                                 Xml::closeElement( 'fieldset' ) . "\n";
 412                 } else {
 413                         $out = '';
 414                 }
 415                 if( $this->mIsAllowed ) {
 416                         $out .= Xml::closeElement( 'form' ) . "\n";
 417                         // Show link to edit the dropdown reasons
 418                         if( $this->getUser()->isAllowed( 'editinterface' ) ) {
 419                                 $title = Title::makeTitle( NS_MEDIAWIKI, 'revdelete-reason-dropdown' );
 420                                 $link = Linker::link(
 421                                         $title,
 422                                         wfMsgHtml( 'revdelete-edit-reasonlist' ),
 423                                         array(),
 424                                         array( 'action' => 'edit' )
 425                                 );
 426                                 $out .= Xml::tags( 'p', array( 'class' => 'mw-revdel-editreasons' ), $link ) . "\n";
 427                         }
 428                 }
 429                 $this->getOutput()->addHTML( $out );
 430         }
 431
 432         /**
 433          * Show some introductory text
 434          * @todo FIXME: Wikimedia-specific policy text
 435          */
 436         protected function addUsageText() {
 437                 $this->getOutput()->addWikiMsg( 'revdelete-text' );
 438                 if( $this->getUser()->isAllowed( 'suppressrevision' ) ) {
 439                         $this->getOutput()->addWikiMsg( 'revdelete-suppress-text' );
 440                 }
 441                 if( $this->mIsAllowed ) {
 442                         $this->getOutput()->addWikiMsg( 'revdelete-confirm' );
 443                 }
 444         }
 445
 446         /**
 447         * @return String: HTML
 448         */
 449         protected function buildCheckBoxes() {
 450                 $html = '<table>';
 451                 // If there is just one item, use checkboxes
 452                 $list = $this->getList();
 453                 if( $list->length() == 1 ) {
 454                         $list->reset();
 455                         $bitfield = $list->current()->getBits(); // existing field
 456                         if( $this->submitClicked ) {
 457                                 $bitfield = $this->extractBitfield( $this->extractBitParams(), $bitfield );
 458                         }
 459                         foreach( $this->checks as $item ) {
 460                                 list( $message, $name, $field ) = $item;
 461                                 $innerHTML = Xml::checkLabel( wfMsg($message), $name, $name, $bitfield & $field );
 462                                 if( $field == Revision::DELETED_RESTRICTED )
 463                                         $innerHTML = "<b>$innerHTML</b>";
 464                                 $line = Xml::tags( 'td', array( 'class' => 'mw-input' ), $innerHTML );
 465                                 $html .= "<tr>$line</tr>\n";
 466                         }
 467                 // Otherwise, use tri-state radios
 468                 } else {
 469                         $html .= '<tr>';
 470                         $html .= '<th class="mw-revdel-checkbox">'.wfMsgHtml('revdelete-radio-same').'</th>';
 471                         $html .= '<th class="mw-revdel-checkbox">'.wfMsgHtml('revdelete-radio-unset').'</th>';
 472                         $html .= '<th class="mw-revdel-checkbox">'.wfMsgHtml('revdelete-radio-set').'</th>';
 473                         $html .= "<th></th></tr>\n";
 474                         foreach( $this->checks as $item ) {
 475                                 list( $message, $name, $field ) = $item;
 476                                 // If there are several items, use third state by default...
 477                                 if( $this->submitClicked ) {
 478                                         $selected = $this->getRequest()->getInt( $name, 0 /* unchecked */ );
 479                                 } else {
 480                                         $selected = -1; // use existing field
 481                                 }
 482                                 $line = '<td class="mw-revdel-checkbox">' . Xml::radio( $name, -1, $selected == -1 ) . '</td>';
 483                                 $line .= '<td class="mw-revdel-checkbox">' . Xml::radio( $name, 0, $selected == 0 ) . '</td>';
 484                                 $line .= '<td class="mw-revdel-checkbox">' . Xml::radio( $name, 1, $selected == 1 ) . '</td>';
 485                                 $label = wfMsgHtml($message);
 486                                 if( $field == Revision::DELETED_RESTRICTED ) {
 487                                         $label = "<b>$label</b>";
 488                                 }
 489                                 $line .= "<td>$label</td>";
 490                                 $html .= "<tr>$line</tr>\n";
 491                         }
 492                 }
 493
 494                 $html .= '</table>';
 495                 return $html;
 496         }
 497
 498         /**
 499          * UI entry point for form submission.
 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 .= wfMsgForContent( 'colon-separator' ) . $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                         $this->getOutput()->permissionRequired( 'suppressrevision' );
 520                         return false;
 521                 }
 522                 # If the save went through, go to success message...
 523                 $status = $this->save( $bitParams, $comment, $this->targetObj );
 524                 if ( $status->isGood() ) {
 525                         $this->success();
 526                         return true;
 527                 # ...otherwise, bounce back to form...
 528                 } else {
 529                         $this->failure( $status );
 530                 }
 531                 return false;
 532         }
 533
 534         /**
 535          * Report that the submit operation succeeded
 536          */
 537         protected function success() {
 538                 $this->getOutput()->setPageTitle( $this->msg( 'actioncomplete' ) );
 539                 $this->getOutput()->wrapWikiMsg( "<span class=\"success\">\n$1\n</span>", $this->typeInfo['success'] );
 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->typeInfo['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          * Put together a rev_deleted bitfield
 576          * @param $bitPars array extractBitParams() params
 577          * @param $oldfield int current bitfield
 578          * @return array
 579          */
 580         public static function extractBitfield( $bitPars, $oldfield ) {
 581                 // Build the actual new rev_deleted bitfield
 582                 $newBits = 0;
 583                 foreach( $bitPars as $const => $val ) {
 584                         if( $val == 1 ) {
 585                                 $newBits |= $const; // $const is the *_deleted const
 586                         } elseif( $val == -1 ) {
 587                                 $newBits |= ($oldfield & $const); // use existing
 588                         }
 589                 }
 590                 return $newBits;
 591         }
 592
 593         /**
 594          * Do the write operations. Simple wrapper for RevDel_*List::setVisibility().
 595          */
 596         protected function save( $bitfield, $reason, $title ) {
 597                 return $this->getList()->setVisibility(
 598                         array( 'value' => $bitfield, 'comment' => $reason )
 599                 );
 600         }
 601 }
 602