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