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