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                         if ( $this->targetObj && $this->targetObj->isSpecial( 'Log' ) ) {
 151                                 $result = wfGetDB( DB_SLAVE )->select( 'logging',
 152                                         'log_type',
 153                                         array( 'log_id' => $this->ids ),
 154                                         __METHOD__,
 155                                         array( 'DISTINCT' )
 156                                 );
 157
 158                                 if ( $result->numRows() == 1 ) {
 159                                         // If there's only one type, the target can be set to include it.
 160                                         $this->targetObj = SpecialPage::getTitleFor( 'Log', $result->current()->log_type );
 161                                 }
 162                         }
 163                 }
 164
 165                 # For reviewing deleted files...
 166                 $this->archiveName = $request->getVal( 'file' );
 167                 $this->token = $request->getVal( 'token' );
 168                 if ( $this->archiveName && $this->targetObj ) {
 169                         $this->tryShowFile( $this->archiveName );
 170                         return;
 171                 }
 172
 173                 if ( isset( self::$deprecatedTypeMap[$this->typeName] ) ) {
 174                         $this->typeName = self::$deprecatedTypeMap[$this->typeName];
 175                 }
 176
 177                 # No targets?
 178                 if( !isset( self::$allowedTypes[$this->typeName] ) || count( $this->ids ) == 0 ) {
 179                         throw new ErrorPageError( 'revdelete-nooldid-title', 'revdelete-nooldid-text' );
 180                 }
 181                 $this->typeInfo = self::$allowedTypes[$this->typeName];
 182                 $this->mIsAllowed = $user->isAllowed( $this->typeInfo['permission'] );
 183
 184                 # If we have revisions, get the title from the first one
 185                 # since they should all be from the same page. This allows
 186                 # for more flexibility with page moves...
 187                 if( $this->typeName == 'revision' ) {
 188                         $rev = Revision::newFromId( $this->ids[0] );
 189                         $this->targetObj = $rev ? $rev->getTitle() : $this->targetObj;
 190                 }
 191
 192                 $this->otherReason = $request->getVal( 'wpReason' );
 193                 # We need a target page!
 194                 if( is_null($this->targetObj) ) {
 195                         $output->addWikiMsg( 'undelete-header' );
 196                         return;
 197                 }
 198                 # Give a link to the logs/hist for this page
 199                 $this->showConvenienceLinks();
 200
 201                 # Initialise checkboxes
 202                 $this->checks = array(
 203                         array( $this->typeInfo['check-label'], 'wpHidePrimary', $this->typeInfo['deletion-bits'] ),
 204                         array( 'revdelete-hide-comment', 'wpHideComment', Revision::DELETED_COMMENT ),
 205                         array( 'revdelete-hide-user', 'wpHideUser', Revision::DELETED_USER )
 206                 );
 207                 if( $user->isAllowed('suppressrevision') ) {
 208                         $this->checks[] = array( 'revdelete-hide-restricted',
 209                                 'wpHideRestricted', Revision::DELETED_RESTRICTED );
 210                 }
 211
 212                 # Either submit or create our form
 213                 if( $this->mIsAllowed && $this->submitClicked ) {
 214                         $this->submit( $request );
 215                 } else {
 216                         $this->showForm();
 217                 }
 218
 219                 $qc = $this->getLogQueryCond();
 220                 # Show relevant lines from the deletion log
 221                 $deleteLogPage = new LogPage( 'delete' );
 222                 $output->addHTML( "<h2>" . $deleteLogPage->getName()->escaped() . "</h2>\n" );
 223                 LogEventsList::showLogExtract( $output, 'delete',
 224                         $this->targetObj, '', array( 'lim' => 25, 'conds' => $qc ) );
 225                 # Show relevant lines from the suppression log
 226                 if( $user->isAllowed( 'suppressionlog' ) ) {
 227                         $suppressLogPage = new LogPage( 'suppress' );
 228                         $output->addHTML( "<h2>" . $suppressLogPage->getName()->escaped()  . "</h2>\n" );
 229                         LogEventsList::showLogExtract( $output, 'suppress',
 230                                 $this->targetObj, '', array( 'lim' => 25, 'conds' => $qc ) );
 231                 }
 232         }
 233
 234         /**
 235          * Show some useful links in the subtitle
 236          */
 237         protected function showConvenienceLinks() {
 238                 # Give a link to the logs/hist for this page
 239                 if( $this->targetObj ) {
 240                         $links = array();
 241                         $links[] = Linker::linkKnown(
 242                                 SpecialPage::getTitleFor( 'Log' ),
 243                                 $this->msg( 'viewpagelogs' )->escaped(),
 244                                 array(),
 245                                 array( 'page' => $this->targetObj->getPrefixedText() )
 246                         );
 247                         if ( !$this->targetObj->isSpecialPage() ) {
 248                                 # Give a link to the page history
 249                                 $links[] = Linker::linkKnown(
 250                                         $this->targetObj,
 251                                         $this->msg( 'pagehist' )->escaped(),
 252                                         array(),
 253                                         array( 'action' => 'history' )
 254                                 );
 255                                 # Link to deleted edits
 256                                 if( $this->getUser()->isAllowed('undelete') ) {
 257                                         $undelete = SpecialPage::getTitleFor( 'Undelete' );
 258                                         $links[] = Linker::linkKnown(
 259                                                 $undelete,
 260                                                 $this->msg( 'deletedhist' )->escaped(),
 261                                                 array(),
 262                                                 array( 'target' => $this->targetObj->getPrefixedDBkey() )
 263                                         );
 264                                 }
 265                         }
 266                         # Logs themselves don't have histories or archived revisions
 267                         $this->getOutput()->addSubtitle( $this->getLanguage()->pipeList( $links ) );
 268                 }
 269         }
 270
 271         /**
 272          * Get the condition used for fetching log snippets
 273          * @return array
 274          */
 275         protected function getLogQueryCond() {
 276                 $conds = array();
 277                 // Revision delete logs for these item
 278                 $conds['log_type'] = array( 'delete', 'suppress' );
 279                 $conds['log_action'] = $this->getList()->getLogAction();
 280                 $conds['ls_field'] = RevisionDeleter::getRelationType( $this->typeName );
 281                 $conds['ls_value'] = $this->ids;
 282                 return $conds;
 283         }
 284
 285         /**
 286          * Show a deleted file version requested by the visitor.
 287          * TODO Mostly copied from Special:Undelete. Refactor.
 288          */
 289         protected function tryShowFile( $archiveName ) {
 290                 $repo = RepoGroup::singleton()->getLocalRepo();
 291                 $oimage = $repo->newFromArchiveName( $this->targetObj, $archiveName );
 292                 $oimage->load();
 293                 // Check if user is allowed to see this file
 294                 if ( !$oimage->exists() ) {
 295                         $this->getOutput()->addWikiMsg( 'revdelete-no-file' );
 296                         return;
 297                 }
 298                 $user = $this->getUser();
 299                 if( !$oimage->userCan( File::DELETED_FILE, $user ) ) {
 300                         if( $oimage->isDeleted( File::DELETED_RESTRICTED ) ) {
 301                                 throw new PermissionsError( 'suppressrevision' );
 302                         } else {
 303                                 throw new PermissionsError( 'deletedtext' );
 304                         }
 305                 }
 306                 if ( !$user->matchEditToken( $this->token, $archiveName ) ) {
 307                         $lang = $this->getLanguage();
 308                         $this->getOutput()->addWikiMsg( 'revdelete-show-file-confirm',
 309                                 $this->targetObj->getText(),
 310                                 $lang->userDate( $oimage->getTimestamp(), $user ),
 311                                 $lang->userTime( $oimage->getTimestamp(), $user ) );
 312                         $this->getOutput()->addHTML(
 313                                 Xml::openElement( 'form', array(
 314                                         'method' => 'POST',
 315                                         'action' => $this->getTitle()->getLocalUrl(
 316                                                 'target=' . urlencode( $this->targetObj->getPrefixedDBkey() ) .
 317                                                 '&file=' . urlencode( $archiveName ) .
 318                                                 '&token=' . urlencode( $user->getEditToken( $archiveName ) ) )
 319                                         )
 320                                 ) .
 321                                 Xml::submitButton( $this->msg( 'revdelete-show-file-submit' )->text() ) .
 322                                 '</form>'
 323                         );
 324                         return;
 325                 }
 326                 $this->getOutput()->disable();
 327                 # We mustn't allow the output to be Squid cached, otherwise
 328                 # if an admin previews a deleted image, and it's cached, then
 329                 # a user without appropriate permissions can toddle off and
 330                 # nab the image, and Squid will serve it
 331                 $this->getRequest()->response()->header( 'Expires: ' . gmdate( 'D, d M Y H:i:s', 0 ) . ' GMT' );
 332                 $this->getRequest()->response()->header( 'Cache-Control: no-cache, no-store, max-age=0, must-revalidate' );
 333                 $this->getRequest()->response()->header( 'Pragma: no-cache' );
 334
 335                 $key = $oimage->getStorageKey();
 336                 $path = $repo->getZonePath( 'deleted' ) . '/' . $repo->getDeletedHashPath( $key ) . $key;
 337                 $repo->streamFile( $path );
 338         }
 339
 340         /**
 341          * Get the list object for this request
 342          */
 343         protected function getList() {
 344                 if ( is_null( $this->list ) ) {
 345                         $class = $this->typeInfo['list-class'];
 346                         $this->list = new $class( $this->getContext(), $this->targetObj, $this->ids );
 347                 }
 348                 return $this->list;
 349         }
 350
 351         /**
 352          * Show a list of items that we will operate on, and show a form with checkboxes
 353          * which will allow the user to choose new visibility settings.
 354          */
 355         protected function showForm() {
 356                 $UserAllowed = true;
 357
 358                 if ( $this->typeName == 'logging' ) {
 359                         $this->getOutput()->addWikiMsg( 'logdelete-selected', $this->getLanguage()->formatNum( count($this->ids) ) );
 360                 } else {
 361                         $this->getOutput()->addWikiMsg( 'revdelete-selected',
 362                                 $this->targetObj->getPrefixedText(), count( $this->ids ) );
 363                 }
 364
 365                 $this->getOutput()->addHTML( "<ul>" );
 366
 367                 $numRevisions = 0;
 368                 // Live revisions...
 369                 $list = $this->getList();
 370                 for ( $list->reset(); $list->current(); $list->next() ) {
 371                         $item = $list->current();
 372                         if ( !$item->canView() ) {
 373                                 if( !$this->submitClicked ) {
 374                                         throw new PermissionsError( 'suppressrevision' );
 375                                 }
 376                                 $UserAllowed = false;
 377                         }
 378                         $numRevisions++;
 379                         $this->getOutput()->addHTML( $item->getHTML() );
 380                 }
 381
 382                 if( !$numRevisions ) {
 383                         throw new ErrorPageError( 'revdelete-nooldid-title', 'revdelete-nooldid-text' );
 384                 }
 385
 386                 $this->getOutput()->addHTML( "</ul>" );
 387                 // Explanation text
 388                 $this->addUsageText();
 389
 390                 // Normal sysops can always see what they did, but can't always change it
 391                 if( !$UserAllowed ) return;
 392
 393                 // Show form if the user can submit
 394                 if( $this->mIsAllowed ) {
 395                         $out = Xml::openElement( 'form', array( 'method' => 'post',
 396                                         'action' => $this->getTitle()->getLocalUrl( array( 'action' => 'submit' ) ),
 397                                         'id' => 'mw-revdel-form-revisions' ) ) .
 398                                 Xml::fieldset( $this->msg( 'revdelete-legend' )->text() ) .
 399                                 $this->buildCheckBoxes() .
 400                                 Xml::openElement( 'table' ) .
 401                                 "<tr>\n" .
 402                                         '<td class="mw-label">' .
 403                                                 Xml::label( $this->msg( 'revdelete-log' )->text(), 'wpRevDeleteReasonList' ) .
 404                                         '</td>' .
 405                                         '<td class="mw-input">' .
 406                                                 Xml::listDropDown( 'wpRevDeleteReasonList',
 407                                                         $this->msg( 'revdelete-reason-dropdown' )->inContentLanguage()->text(),
 408                                                         $this->msg( 'revdelete-reasonotherlist' )->inContentLanguage()->text(),
 409                                                         '', 'wpReasonDropDown', 1
 410                                                 ) .
 411                                         '</td>' .
 412                                 "</tr><tr>\n" .
 413                                         '<td class="mw-label">' .
 414                                                 Xml::label( $this->msg( 'revdelete-otherreason' )->text(), 'wpReason' ) .
 415                                         '</td>' .
 416                                         '<td class="mw-input">' .
 417                                                 Xml::input( 'wpReason', 60, $this->otherReason, array( 'id' => 'wpReason', 'maxlength' => 100 ) ) .
 418                                         '</td>' .
 419                                 "</tr><tr>\n" .
 420                                         '<td></td>' .
 421                                         '<td class="mw-submit">' .
 422                                                 Xml::submitButton( $this->msg( 'revdelete-submit', $numRevisions )->text(),
 423                                                         array( 'name' => 'wpSubmit' ) ) .
 424                                         '</td>' .
 425                                 "</tr>\n" .
 426                                 Xml::closeElement( 'table' ) .
 427                                 Html::hidden( 'wpEditToken', $this->getUser()->getEditToken() ) .
 428                                 Html::hidden( 'target', $this->targetObj->getPrefixedText() ) .
 429                                 Html::hidden( 'type', $this->typeName ) .
 430                                 Html::hidden( 'ids', implode( ',', $this->ids ) ) .
 431                                 Xml::closeElement( 'fieldset' ) . "\n";
 432                 } else {
 433                         $out = '';
 434                 }
 435                 if( $this->mIsAllowed ) {
 436                         $out .= Xml::closeElement( 'form' ) . "\n";
 437                         // Show link to edit the dropdown reasons
 438                         if( $this->getUser()->isAllowed( 'editinterface' ) ) {
 439                                 $title = Title::makeTitle( NS_MEDIAWIKI, 'Revdelete-reason-dropdown' );
 440                                 $link = Linker::link(
 441                                         $title,
 442                                         $this->msg( 'revdelete-edit-reasonlist' )->escaped(),
 443                                         array(),
 444                                         array( 'action' => 'edit' )
 445                                 );
 446                                 $out .= Xml::tags( 'p', array( 'class' => 'mw-revdel-editreasons' ), $link ) . "\n";
 447                         }
 448                 }
 449                 $this->getOutput()->addHTML( $out );
 450         }
 451
 452         /**
 453          * Show some introductory text
 454          * @todo FIXME: Wikimedia-specific policy text
 455          */
 456         protected function addUsageText() {
 457                 $this->getOutput()->addWikiMsg( 'revdelete-text' );
 458                 if( $this->getUser()->isAllowed( 'suppressrevision' ) ) {
 459                         $this->getOutput()->addWikiMsg( 'revdelete-suppress-text' );
 460                 }
 461                 if( $this->mIsAllowed ) {
 462                         $this->getOutput()->addWikiMsg( 'revdelete-confirm' );
 463                 }
 464         }
 465
 466         /**
 467         * @return String: HTML
 468         */
 469         protected function buildCheckBoxes() {
 470                 $html = '<table>';
 471                 // If there is just one item, use checkboxes
 472                 $list = $this->getList();
 473                 if( $list->length() == 1 ) {
 474                         $list->reset();
 475                         $bitfield = $list->current()->getBits(); // existing field
 476                         if( $this->submitClicked ) {
 477                                 $bitfield = $this->extractBitfield( $this->extractBitParams(), $bitfield );
 478                         }
 479                         foreach( $this->checks as $item ) {
 480                                 list( $message, $name, $field ) = $item;
 481                                 $innerHTML = Xml::checkLabel( $this->msg( $message )->text(), $name, $name, $bitfield & $field );
 482                                 if( $field == Revision::DELETED_RESTRICTED )
 483                                         $innerHTML = "<b>$innerHTML</b>";
 484                                 $line = Xml::tags( 'td', array( 'class' => 'mw-input' ), $innerHTML );
 485                                 $html .= "<tr>$line</tr>\n";
 486                         }
 487                 // Otherwise, use tri-state radios
 488                 } else {
 489                         $html .= '<tr>';
 490                         $html .= '<th class="mw-revdel-checkbox">' . $this->msg( 'revdelete-radio-same' )->escaped() . '</th>';
 491                         $html .= '<th class="mw-revdel-checkbox">' . $this->msg( 'revdelete-radio-unset' )->escaped() . '</th>';
 492                         $html .= '<th class="mw-revdel-checkbox">' . $this->msg( 'revdelete-radio-set' )->escaped() . '</th>';
 493                         $html .= "<th></th></tr>\n";
 494                         foreach( $this->checks as $item ) {
 495                                 list( $message, $name, $field ) = $item;
 496                                 // If there are several items, use third state by default...
 497                                 if( $this->submitClicked ) {
 498                                         $selected = $this->getRequest()->getInt( $name, 0 /* unchecked */ );
 499                                 } else {
 500                                         $selected = -1; // use existing field
 501                                 }
 502                                 $line = '<td class="mw-revdel-checkbox">' . Xml::radio( $name, -1, $selected == -1 ) . '</td>';
 503                                 $line .= '<td class="mw-revdel-checkbox">' . Xml::radio( $name, 0, $selected == 0 ) . '</td>';
 504                                 $line .= '<td class="mw-revdel-checkbox">' . Xml::radio( $name, 1, $selected == 1 ) . '</td>';
 505                                 $label = $this->msg( $message )->escaped();
 506                                 if( $field == Revision::DELETED_RESTRICTED ) {
 507                                         $label = "<b>$label</b>";
 508                                 }
 509                                 $line .= "<td>$label</td>";
 510                                 $html .= "<tr>$line</tr>\n";
 511                         }
 512                 }
 513
 514                 $html .= '</table>';
 515                 return $html;
 516         }
 517
 518         /**
 519          * UI entry point for form submission.
 520          * @throws PermissionsError
 521          * @return bool
 522          */
 523         protected function submit() {
 524                 # Check edit token on submission
 525                 $token = $this->getRequest()->getVal('wpEditToken');
 526                 if( $this->submitClicked && !$this->getUser()->matchEditToken( $token ) ) {
 527                         $this->getOutput()->addWikiMsg( 'sessionfailure' );
 528                         return false;
 529                 }
 530                 $bitParams = $this->extractBitParams();
 531                 $listReason = $this->getRequest()->getText( 'wpRevDeleteReasonList', 'other' ); // from dropdown
 532                 $comment = $listReason;
 533                 if( $comment != 'other' && $this->otherReason != '' ) {
 534                         // Entry from drop down menu + additional comment
 535                         $comment .= $this->msg( 'colon-separator' )->inContentLanguage()->text() . $this->otherReason;
 536                 } elseif( $comment == 'other' ) {
 537                         $comment = $this->otherReason;
 538                 }
 539                 # Can the user set this field?
 540                 if( $bitParams[Revision::DELETED_RESTRICTED]==1 && !$this->getUser()->isAllowed('suppressrevision') ) {
 541                         throw new PermissionsError( 'suppressrevision' );
 542                 }
 543                 # If the save went through, go to success message...
 544                 $status = $this->save( $bitParams, $comment, $this->targetObj );
 545                 if ( $status->isGood() ) {
 546                         $this->success();
 547                         return true;
 548                 # ...otherwise, bounce back to form...
 549                 } else {
 550                         $this->failure( $status );
 551                 }
 552                 return false;
 553         }
 554
 555         /**
 556          * Report that the submit operation succeeded
 557          */
 558         protected function success() {
 559                 $this->getOutput()->setPageTitle( $this->msg( 'actioncomplete' ) );
 560                 $this->getOutput()->wrapWikiMsg( "<span class=\"success\">\n$1\n</span>", $this->typeInfo['success'] );
 561                 $this->list->reloadFromMaster();
 562                 $this->showForm();
 563         }
 564
 565         /**
 566          * Report that the submit operation failed
 567          */
 568         protected function failure( $status ) {
 569                 $this->getOutput()->setPageTitle( $this->msg( 'actionfailed' ) );
 570                 $this->getOutput()->addWikiText( $status->getWikiText( $this->typeInfo['failure'] ) );
 571                 $this->showForm();
 572         }
 573
 574         /**
 575          * Put together an array that contains -1, 0, or the *_deleted const for each bit
 576          *
 577          * @return array
 578          */
 579         protected function extractBitParams() {
 580                 $bitfield = array();
 581                 foreach( $this->checks as $item ) {
 582                         list( /* message */ , $name, $field ) = $item;
 583                         $val = $this->getRequest()->getInt( $name, 0 /* unchecked */ );
 584                         if( $val < -1 || $val > 1) {
 585                                 $val = -1; // -1 for existing value
 586                         }
 587                         $bitfield[$field] = $val;
 588                 }
 589                 if( !isset($bitfield[Revision::DELETED_RESTRICTED]) ) {
 590                         $bitfield[Revision::DELETED_RESTRICTED] = 0;
 591                 }
 592                 return $bitfield;
 593         }
 594
 595         /**
 596          * Put together a rev_deleted bitfield
 597          * @param $bitPars array extractBitParams() params
 598          * @param $oldfield int current bitfield
 599          * @return array
 600          */
 601         public static function extractBitfield( $bitPars, $oldfield ) {
 602                 // Build the actual new rev_deleted bitfield
 603                 $newBits = 0;
 604                 foreach( $bitPars as $const => $val ) {
 605                         if( $val == 1 ) {
 606                                 $newBits |= $const; // $const is the *_deleted const
 607                         } elseif( $val == -1 ) {
 608                                 $newBits |= ($oldfield & $const); // use existing
 609                         }
 610                 }
 611                 return $newBits;
 612         }
 613
 614         /**
 615          * Do the write operations. Simple wrapper for RevDel_*List::setVisibility().
 616          * @param $bitfield
 617          * @param $reason
 618          * @param $title
 619          * @return
 620          */
 621         protected function save( $bitfield, $reason, $title ) {
 622                 return $this->getList()->setVisibility(
 623                         array( 'value' => $bitfield, 'comment' => $reason )
 624                 );
 625         }
 626 }
 627