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         /** Skin object */
  32         var $skin;
  33
  34         /** True if the submit button was clicked, and the form was posted */
  35         var $submitClicked;
  36
  37         /** Target ID list */
  38         var $ids;
  39
  40         /** Archive name, for reviewing deleted files */
  41         var $archiveName;
  42
  43         /** Edit token for securing image views against XSS */
  44         var $token;
  45
  46         /** Title object for target parameter */
  47         var $targetObj;
  48
  49         /** Deletion type, may be revision, archive, oldimage, filearchive, logging. */
  50         var $typeName;
  51
  52         /** Array of checkbox specs (message, name, deletion bits) */
  53         var $checks;
  54
  55         /** Information about the current type */
  56         var $typeInfo;
  57
  58         /** The RevDel_List object, storing the list of items to be deleted/undeleted */
  59         var $list;
  60
  61         /**
  62          * Assorted information about each type, needed by the special page.
  63          * TODO Move some of this to the list class
  64          */
  65         static $allowedTypes = array(
  66                 'revision' => array(
  67                         'check-label' => 'revdelete-hide-text',
  68                         'deletion-bits' => Revision::DELETED_TEXT,
  69                         'success' => 'revdelete-success',
  70                         'failure' => 'revdelete-failure',
  71                         'list-class' => 'RevDel_RevisionList',
  72                 ),
  73                 'archive' => array(
  74                         'check-label' => 'revdelete-hide-text',
  75                         'deletion-bits' => Revision::DELETED_TEXT,
  76                         'success' => 'revdelete-success',
  77                         'failure' => 'revdelete-failure',
  78                         'list-class' => 'RevDel_ArchiveList',
  79                 ),
  80                 'oldimage'=> array(
  81                         'check-label' => 'revdelete-hide-image',
  82                         'deletion-bits' => File::DELETED_FILE,
  83                         'success' => 'revdelete-success',
  84                         'failure' => 'revdelete-failure',
  85                         'list-class' => 'RevDel_FileList',
  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                 ),
  94                 'logging' => array(
  95                         'check-label' => 'revdelete-hide-name',
  96                         'deletion-bits' => LogPage::DELETED_ACTION,
  97                         'success' => 'logdelete-success',
  98                         'failure' => 'logdelete-failure',
  99                         'list-class' => 'RevDel_LogList',
 100                 ),
 101         );
 102
 103         /** Type map to support old log entries */
 104         static $deprecatedTypeMap = array(
 105                 'oldid' => 'revision',
 106                 'artimestamp' => 'archive',
 107                 'oldimage' => 'oldimage',
 108                 'fileid' => 'filearchive',
 109                 'logid' => 'logging',
 110         );
 111
 112         public function __construct() {
 113                 parent::__construct( 'Revisiondelete', 'deletedhistory' );
 114         }
 115
 116         public function execute( $par ) {
 117                 global $wgOut, $wgUser, $wgRequest;
 118                 if( !$wgUser->isAllowed( 'deletedhistory' ) ) {
 119                         $wgOut->permissionRequired( 'deletedhistory' );
 120                         return;
 121                 } else if( wfReadOnly() ) {
 122                         $wgOut->readOnlyPage();
 123                         return;
 124                 }
 125                 $this->mIsAllowed = $wgUser->isAllowed('deleterevision'); // for changes
 126                 $this->skin = $wgUser->getSkin();
 127                 $this->setHeaders();
 128                 $this->outputHeader();
 129                 $this->submitClicked = $wgRequest->wasPosted() && $wgRequest->getBool( 'wpSubmit' );
 130                 # Handle our many different possible input types.
 131                 $ids = $wgRequest->getVal( 'ids' );
 132                 if ( !is_null( $ids ) ) {
 133                         # Allow CSV, for backwards compatibility, or a single ID for show/hide links
 134                         $this->ids = explode( ',', $ids );
 135                 } else {
 136                         # Array input
 137                         $this->ids = array_keys( $wgRequest->getArray('ids',array()) );
 138                 }
 139                 // $this->ids = array_map( 'intval', $this->ids );
 140                 $this->ids = array_unique( array_filter( $this->ids ) );
 141
 142                 if ( $wgRequest->getVal( 'action' ) == 'historysubmit' ) {
 143                         # For show/hide form submission from history page
 144                         $this->targetObj = $GLOBALS['wgTitle'];
 145                         $this->typeName = 'revision';
 146                 } else {
 147                         $this->typeName = $wgRequest->getVal( 'type' );
 148                         $this->targetObj = Title::newFromText( $wgRequest->getText( 'target' ) );
 149                 }
 150
 151                 # For reviewing deleted files...
 152                 $this->archiveName = $wgRequest->getVal( 'file' );
 153                 $this->token = $wgRequest->getVal( 'token' );
 154                 if ( $this->archiveName && $this->targetObj ) {
 155                         $this->tryShowFile( $this->archiveName );
 156                         return;
 157                 }
 158
 159                 if ( isset( self::$deprecatedTypeMap[$this->typeName] ) ) {
 160                         $this->typeName = self::$deprecatedTypeMap[$this->typeName];
 161                 }
 162
 163                 # No targets?
 164                 if( !isset( self::$allowedTypes[$this->typeName] ) || count( $this->ids ) == 0 ) {
 165                         $wgOut->showErrorPage( 'revdelete-nooldid-title', 'revdelete-nooldid-text' );
 166                         return;
 167                 }
 168                 $this->typeInfo = self::$allowedTypes[$this->typeName];
 169
 170                 # If we have revisions, get the title from the first one
 171                 # since they should all be from the same page. This allows
 172                 # for more flexibility with page moves...
 173                 if( $this->typeName == 'revision' ) {
 174                         $rev = Revision::newFromId( $this->ids[0] );
 175                         $this->targetObj = $rev ? $rev->getTitle() : $this->targetObj;
 176                 }
 177
 178                 $this->otherReason = $wgRequest->getVal( 'wpReason' );
 179                 # We need a target page!
 180                 if( is_null($this->targetObj) ) {
 181                         $wgOut->addWikiMsg( 'undelete-header' );
 182                         return;
 183                 }
 184                 # Give a link to the logs/hist for this page
 185                 $this->showConvenienceLinks();
 186
 187                 # Initialise checkboxes
 188                 $this->checks = array(
 189                         array( $this->typeInfo['check-label'], 'wpHidePrimary', $this->typeInfo['deletion-bits'] ),
 190                         array( 'revdelete-hide-comment', 'wpHideComment', Revision::DELETED_COMMENT ),
 191                         array( 'revdelete-hide-user', 'wpHideUser', Revision::DELETED_USER )
 192                 );
 193                 if( $wgUser->isAllowed('suppressrevision') ) {
 194                         $this->checks[] = array( 'revdelete-hide-restricted',
 195                                 'wpHideRestricted', Revision::DELETED_RESTRICTED );
 196                 }
 197
 198                 # Either submit or create our form
 199                 if( $this->mIsAllowed && $this->submitClicked ) {
 200                         $this->submit( $wgRequest );
 201                 } else {
 202                         $this->showForm();
 203                 }
 204
 205                 $qc = $this->getLogQueryCond();
 206                 # Show relevant lines from the deletion log
 207                 $wgOut->addHTML( "<h2>" . htmlspecialchars( LogPage::logName( 'delete' ) ) . "</h2>\n" );
 208                 LogEventsList::showLogExtract( $wgOut, 'delete',
 209                         $this->targetObj->getPrefixedText(), '', array( 'lim' => 25, 'conds' => $qc ) );
 210                 # Show relevant lines from the suppression log
 211                 if( $wgUser->isAllowed( 'suppressionlog' ) ) {
 212                         $wgOut->addHTML( "<h2>" . htmlspecialchars( LogPage::logName( 'suppress' ) ) . "</h2>\n" );
 213                         LogEventsList::showLogExtract( $wgOut, 'suppress',
 214                                 $this->targetObj->getPrefixedText(), '', array( 'lim' => 25, 'conds' => $qc ) );
 215                 }
 216         }
 217
 218         /**
 219          * Show some useful links in the subtitle
 220          */
 221         protected function showConvenienceLinks() {
 222                 global $wgOut, $wgUser, $wgLang;
 223                 # Give a link to the logs/hist for this page
 224                 if( $this->targetObj ) {
 225                         $links = array();
 226                         $links[] = $this->skin->linkKnown(
 227                                 SpecialPage::getTitleFor( 'Log' ),
 228                                 wfMsgHtml( 'viewpagelogs' ),
 229                                 array(),
 230                                 array( 'page' => $this->targetObj->getPrefixedText() )
 231                         );
 232                         if ( $this->targetObj->getNamespace() != NS_SPECIAL ) {
 233                                 # Give a link to the page history
 234                                 $links[] = $this->skin->linkKnown(
 235                                         $this->targetObj,
 236                                         wfMsgHtml( 'pagehist' ),
 237                                         array(),
 238                                         array( 'action' => 'history' )
 239                                 );
 240                                 # Link to deleted edits
 241                                 if( $wgUser->isAllowed('undelete') ) {
 242                                         $undelete = SpecialPage::getTitleFor( 'Undelete' );
 243                                         $links[] = $this->skin->linkKnown(
 244                                                 $undelete,
 245                                                 wfMsgHtml( 'deletedhist' ),
 246                                                 array(),
 247                                                 array( 'target' => $this->targetObj->getPrefixedDBkey() )
 248                                         );
 249                                 }
 250                         }
 251                         # Logs themselves don't have histories or archived revisions
 252                         $wgOut->setSubtitle( '<p>' . $wgLang->pipeList( $links ) . '</p>' );
 253                 }
 254         }
 255
 256         /**
 257          * Get the condition used for fetching log snippets
 258          */
 259         protected function getLogQueryCond() {
 260                 $conds = array();
 261                 // Revision delete logs for these item
 262                 $conds['log_type'] = array('delete','suppress');
 263                 $conds['log_action'] = $this->getList()->getLogAction();
 264                 $conds['ls_field'] = RevisionDeleter::getRelationType( $this->typeName );
 265                 $conds['ls_value'] = $this->ids;
 266                 return $conds;
 267         }
 268
 269         /**
 270          * Show a deleted file version requested by the visitor.
 271          * TODO Mostly copied from Special:Undelete. Refactor.
 272          */
 273         protected function tryShowFile( $archiveName ) {
 274                 global $wgOut, $wgRequest, $wgUser, $wgLang;
 275
 276                 $repo = RepoGroup::singleton()->getLocalRepo();
 277                 $oimage = $repo->newFromArchiveName( $this->targetObj, $archiveName );
 278                 $oimage->load();
 279                 // Check if user is allowed to see this file
 280                 if ( !$oimage->exists() ) {
 281                         $wgOut->addWikiMsg( 'revdelete-no-file' );
 282                         return;
 283                 }
 284                 if( !$oimage->userCan(File::DELETED_FILE) ) {
 285                         if( $oimage->isDeleted( File::DELETED_RESTRICTED ) ) {
 286                                 $wgOut->permissionRequired( 'suppressrevision' );
 287                         } else {
 288                                 $wgOut->permissionRequired( 'deletedtext' );
 289                         }
 290                         return;
 291                 }
 292                 if ( !$wgUser->matchEditToken( $this->token, $archiveName ) ) {
 293                         $wgOut->addWikiMsg( 'revdelete-show-file-confirm',
 294                                 $this->targetObj->getText(),
 295                                 $wgLang->date( $oimage->getTimestamp() ),
 296                                 $wgLang->time( $oimage->getTimestamp() ) );
 297                         $wgOut->addHTML(
 298                                 Xml::openElement( 'form', array(
 299                                         'method' => 'POST',
 300                                         'action' => $this->getTitle()->getLocalUrl(
 301                                                 'target=' . urlencode( $oimage->getName() ) .
 302                                                 '&file=' . urlencode( $archiveName ) .
 303                                                 '&token=' . urlencode( $wgUser->editToken( $archiveName ) ) )
 304                                         )
 305                                 ) .
 306                                 Xml::submitButton( wfMsg( 'revdelete-show-file-submit' ) ) .
 307                                 '</form>'
 308                         );
 309                         return;
 310                 }
 311                 $wgOut->disable();
 312                 # We mustn't allow the output to be Squid cached, otherwise
 313                 # if an admin previews a deleted image, and it's cached, then
 314                 # a user without appropriate permissions can toddle off and
 315                 # nab the image, and Squid will serve it
 316                 $wgRequest->response()->header( 'Expires: ' . gmdate( 'D, d M Y H:i:s', 0 ) . ' GMT' );
 317                 $wgRequest->response()->header( 'Cache-Control: no-cache, no-store, max-age=0, must-revalidate' );
 318                 $wgRequest->response()->header( 'Pragma: no-cache' );
 319
 320                 # Stream the file to the client
 321                 global $IP;
 322                 require_once( "$IP/includes/StreamFile.php" );
 323                 $key = $oimage->getStorageKey();
 324                 $path = $repo->getZonePath( 'deleted' ) . '/' . $repo->getDeletedHashPath( $key ) . $key;
 325                 wfStreamFile( $path );
 326         }
 327
 328         /**
 329          * Get the list object for this request
 330          */
 331         protected function getList() {
 332                 if ( is_null( $this->list ) ) {
 333                         $class = $this->typeInfo['list-class'];
 334                         $this->list = new $class( $this, $this->targetObj, $this->ids );
 335                 }
 336                 return $this->list;
 337         }
 338
 339         /**
 340          * Show a list of items that we will operate on, and show a form with checkboxes
 341          * which will allow the user to choose new visibility settings.
 342          */
 343         protected function showForm() {
 344                 global $wgOut, $wgUser, $wgLang;
 345                 $UserAllowed = true;
 346
 347                 if ( $this->typeName == 'logging' ) {
 348                         $wgOut->addWikiMsg( 'logdelete-selected', $wgLang->formatNum( count($this->ids) ) );
 349                 } else {
 350                         $wgOut->addWikiMsg( 'revdelete-selected',
 351                                 $this->targetObj->getPrefixedText(), count( $this->ids ) );
 352                 }
 353
 354                 $wgOut->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                                         $wgOut->permissionRequired( 'suppressrevision' );
 364                                         return;
 365                                 }
 366                                 $UserAllowed = false;
 367                         }
 368                         $numRevisions++;
 369                         $wgOut->addHTML( $item->getHTML() );
 370                 }
 371
 372                 if( !$numRevisions ) {
 373                         $wgOut->showErrorPage( 'revdelete-nooldid-title', 'revdelete-nooldid-text' );
 374                         return;
 375                 }
 376
 377                 $wgOut->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( wfMsg( 'revdelete-legend' ) ) .
 390                                 $this->buildCheckBoxes() .
 391                                 Xml::openElement( 'table' ) .
 392                                 "<tr>\n" .
 393                                         '<td class="mw-label">' .
 394                                                 Xml::label( wfMsg( 'revdelete-log' ), 'wpRevDeleteReasonList' ) .
 395                                         '</td>' .
 396                                         '<td class="mw-input">' .
 397                                                 Xml::listDropDown( 'wpRevDeleteReasonList',
 398                                                         wfMsgForContent( 'revdelete-reason-dropdown' ),
 399                                                         wfMsgForContent( 'revdelete-reasonotherlist' ), '', 'wpReasonDropDown', 1
 400                                                 ) .
 401                                         '</td>' .
 402                                 "</tr><tr>\n" .
 403                                         '<td class="mw-label">' .
 404                                                 Xml::label( wfMsg( 'revdelete-otherreason' ), 'wpReason' ) .
 405                                         '</td>' .
 406                                         '<td class="mw-input">' .
 407                                                 Xml::input( 'wpReason', 60, $this->otherReason, array( 'id' => 'wpReason' ) ) .
 408                                         '</td>' .
 409                                 "</tr><tr>\n" .
 410                                         '<td></td>' .
 411                                         '<td class="mw-submit">' .
 412                                                 Xml::submitButton( wfMsgExt('revdelete-submit','parsemag',$numRevisions),
 413                                                         array( 'name' => 'wpSubmit' ) ) .
 414                                         '</td>' .
 415                                 "</tr>\n" .
 416                                 Xml::closeElement( 'table' ) .
 417                                 Html::hidden( 'wpEditToken', $wgUser->editToken() ) .
 418                                 Html::hidden( 'target', $this->targetObj->getPrefixedText() ) .
 419                                 Html::hidden( 'type', $this->typeName ) .
 420                                 Html::hidden( 'ids', implode( ',', $this->ids ) ) .
 421                                 Xml::closeElement( 'fieldset' ) . "\n";
 422                 } else {
 423                         $out = '';
 424                 }
 425                 if( $this->mIsAllowed ) {
 426                         $out .= Xml::closeElement( 'form' ) . "\n";
 427                         // Show link to edit the dropdown reasons
 428                         if( $wgUser->isAllowed( 'editinterface' ) ) {
 429                                 $title = Title::makeTitle( NS_MEDIAWIKI, 'revdelete-reason-dropdown' );
 430                                 $link = $wgUser->getSkin()->link(
 431                                         $title,
 432                                         wfMsgHtml( 'revdelete-edit-reasonlist' ),
 433                                         array(),
 434                                         array( 'action' => 'edit' )
 435                                 );
 436                                 $out .= Xml::tags( 'p', array( 'class' => 'mw-revdel-editreasons' ), $link ) . "\n";
 437                         }
 438                 }
 439                 $wgOut->addHTML( $out );
 440         }
 441
 442         /**
 443          * Show some introductory text
 444          * FIXME Wikimedia-specific policy text
 445          */
 446         protected function addUsageText() {
 447                 global $wgOut, $wgUser;
 448                 $wgOut->addWikiMsg( 'revdelete-text' );
 449                 if( $wgUser->isAllowed( 'suppressrevision' ) ) {
 450                         $wgOut->addWikiMsg( 'revdelete-suppress-text' );
 451                 }
 452                 if( $this->mIsAllowed ) {
 453                         $wgOut->addWikiMsg( 'revdelete-confirm' );
 454                 }
 455         }
 456
 457         /**
 458         * @return String: HTML
 459         */
 460         protected function buildCheckBoxes() {
 461                 global $wgRequest;
 462
 463                 $html = '<table>';
 464                 // If there is just one item, use checkboxes
 465                 $list = $this->getList();
 466                 if( $list->length() == 1 ) {
 467                         $list->reset();
 468                         $bitfield = $list->current()->getBits(); // existing field
 469                         if( $this->submitClicked ) {
 470                                 $bitfield = $this->extractBitfield( $this->extractBitParams($wgRequest), $bitfield );
 471                         }
 472                         foreach( $this->checks as $item ) {
 473                                 list( $message, $name, $field ) = $item;
 474                                 $innerHTML = Xml::checkLabel( wfMsg($message), $name, $name, $bitfield & $field );
 475                                 if( $field == Revision::DELETED_RESTRICTED )
 476                                         $innerHTML = "<b>$innerHTML</b>";
 477                                 $line = Xml::tags( 'td', array( 'class' => 'mw-input' ), $innerHTML );
 478                                 $html .= "<tr>$line</tr>\n";
 479                         }
 480                 // Otherwise, use tri-state radios
 481                 } else {
 482                         $html .= '<tr>';
 483                         $html .= '<th class="mw-revdel-checkbox">'.wfMsgHtml('revdelete-radio-same').'</th>';
 484                         $html .= '<th class="mw-revdel-checkbox">'.wfMsgHtml('revdelete-radio-unset').'</th>';
 485                         $html .= '<th class="mw-revdel-checkbox">'.wfMsgHtml('revdelete-radio-set').'</th>';
 486                         $html .= "<th></th></tr>\n";
 487                         foreach( $this->checks as $item ) {
 488                                 list( $message, $name, $field ) = $item;
 489                                 // If there are several items, use third state by default...
 490                                 if( $this->submitClicked ) {
 491                                         $selected = $wgRequest->getInt( $name, 0 /* unchecked */ );
 492                                 } else {
 493                                         $selected = -1; // use existing field
 494                                 }
 495                                 $line = '<td class="mw-revdel-checkbox">' . Xml::radio( $name, -1, $selected == -1 ) . '</td>';
 496                                 $line .= '<td class="mw-revdel-checkbox">' . Xml::radio( $name, 0, $selected == 0 ) . '</td>';
 497                                 $line .= '<td class="mw-revdel-checkbox">' . Xml::radio( $name, 1, $selected == 1 ) . '</td>';
 498                                 $label = wfMsgHtml($message);
 499                                 if( $field == Revision::DELETED_RESTRICTED ) {
 500                                         $label = "<b>$label</b>";
 501                                 }
 502                                 $line .= "<td>$label</td>";
 503                                 $html .= "<tr>$line</tr>\n";
 504                         }
 505                 }
 506
 507                 $html .= '</table>';
 508                 return $html;
 509         }
 510
 511         /**
 512          * UI entry point for form submission.
 513          * @param $request WebRequest
 514          */
 515         protected function submit( $request ) {
 516                 global $wgUser, $wgOut;
 517                 # Check edit token on submission
 518                 if( $this->submitClicked && !$wgUser->matchEditToken( $request->getVal('wpEditToken') ) ) {
 519                         $wgOut->addWikiMsg( 'sessionfailure' );
 520                         return false;
 521                 }
 522                 $bitParams = $this->extractBitParams( $request );
 523                 $listReason = $request->getText( 'wpRevDeleteReasonList', 'other' ); // from dropdown
 524                 $comment = $listReason;
 525                 if( $comment != 'other' && $this->otherReason != '' ) {
 526                         // Entry from drop down menu + additional comment
 527                         $comment .= wfMsgForContent( 'colon-separator' ) . $this->otherReason;
 528                 } elseif( $comment == 'other' ) {
 529                         $comment = $this->otherReason;
 530                 }
 531                 # Can the user set this field?
 532                 if( $bitParams[Revision::DELETED_RESTRICTED]==1 && !$wgUser->isAllowed('suppressrevision') ) {
 533                         $wgOut->permissionRequired( 'suppressrevision' );
 534                         return false;
 535                 }
 536                 # If the save went through, go to success message...
 537                 $status = $this->save( $bitParams, $comment, $this->targetObj );
 538                 if ( $status->isGood() ) {
 539                         $this->success();
 540                         return true;
 541                 # ...otherwise, bounce back to form...
 542                 } else {
 543                         $this->failure( $status );
 544                 }
 545                 return false;
 546         }
 547
 548         /**
 549          * Report that the submit operation succeeded
 550          */
 551         protected function success() {
 552                 global $wgOut;
 553                 $wgOut->setPagetitle( wfMsg( 'actioncomplete' ) );
 554                 $wgOut->wrapWikiMsg( "<span class=\"success\">\n$1\n</span>", $this->typeInfo['success'] );
 555                 $this->list->reloadFromMaster();
 556                 $this->showForm();
 557         }
 558
 559         /**
 560          * Report that the submit operation failed
 561          */
 562         protected function failure( $status ) {
 563                 global $wgOut;
 564                 $wgOut->setPagetitle( wfMsg( 'actionfailed' ) );
 565                 $wgOut->addWikiText( $status->getWikiText( $this->typeInfo['failure'] ) );
 566                 $this->showForm();
 567         }
 568
 569         /**
 570          * Put together an array that contains -1, 0, or the *_deleted const for each bit
 571          * @param $request WebRequest
 572          * @return array
 573          */
 574         protected function extractBitParams( $request ) {
 575                 $bitfield = array();
 576                 foreach( $this->checks as $item ) {
 577                         list( /* message */ , $name, $field ) = $item;
 578                         $val = $request->getInt( $name, 0 /* unchecked */ );
 579                         if( $val < -1 || $val > 1) {
 580                                 $val = -1; // -1 for existing value
 581                         }
 582                         $bitfield[$field] = $val;
 583                 }
 584                 if( !isset($bitfield[Revision::DELETED_RESTRICTED]) ) {
 585                         $bitfield[Revision::DELETED_RESTRICTED] = 0;
 586                 }
 587                 return $bitfield;
 588         }
 589
 590         /**
 591          * Put together a rev_deleted bitfield
 592          * @param $bitPars array extractBitParams() params
 593          * @param $oldfield int current bitfield
 594          * @return array
 595          */
 596         public static function extractBitfield( $bitPars, $oldfield ) {
 597                 // Build the actual new rev_deleted bitfield
 598                 $newBits = 0;
 599                 foreach( $bitPars as $const => $val ) {
 600                         if( $val == 1 ) {
 601                                 $newBits |= $const; // $const is the *_deleted const
 602                         } else if( $val == -1 ) {
 603                                 $newBits |= ($oldfield & $const); // use existing
 604                         }
 605                 }
 606                 return $newBits;
 607         }
 608
 609         /**
 610          * Do the write operations. Simple wrapper for RevDel_*List::setVisibility().
 611          */
 612         protected function save( $bitfield, $reason, $title ) {
 613                 return $this->getList()->setVisibility(
 614                         array( 'value' => $bitfield, 'comment' => $reason )
 615                 );
 616         }
 617 }
 618