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         /** UI Labels about the current type */
  53         var $typeLabels;
  54
  55         /** The RevDel_List object, storing the list of items to be deleted/undeleted */
  56         var $list;
  57
  58         /**
  59          * UI labels for each type.
  60          */
  61         static $UILabels = array(
  62                 'revision' => array(
  63                         'check-label'   => 'revdelete-hide-text',
  64                         'success'               => 'revdelete-success',
  65                         'failure'               => 'revdelete-failure',
  66                 ),
  67                 'archive' => array(
  68                         'check-label'   => 'revdelete-hide-text',
  69                         'success'               => 'revdelete-success',
  70                         'failure'               => 'revdelete-failure',
  71                 ),
  72                 'oldimage' => array(
  73                         'check-label'   => 'revdelete-hide-image',
  74                         'success'               => 'revdelete-success',
  75                         'failure'               => 'revdelete-failure',
  76                 ),
  77                 'filearchive' => array(
  78                         'check-label'   => 'revdelete-hide-image',
  79                         'success'               => 'revdelete-success',
  80                         'failure'               => 'revdelete-failure',
  81                 ),
  82                 'logging' => array(
  83                         'check-label'   => 'revdelete-hide-name',
  84                         'success'               => 'logdelete-success',
  85                         'failure'               => 'logdelete-failure',
  86                 ),
  87         );
  88
  89         public function __construct() {
  90                 parent::__construct( 'Revisiondelete', 'deletedhistory' );
  91         }
  92
  93         public function execute( $par ) {
  94                 $this->checkPermissions();
  95                 $this->checkReadOnly();
  96
  97                 $output = $this->getOutput();
  98                 $user = $this->getUser();
  99
 100                 $this->setHeaders();
 101                 $this->outputHeader();
 102                 $request = $this->getRequest();
 103                 $this->submitClicked = $request->wasPosted() && $request->getBool( 'wpSubmit' );
 104                 # Handle our many different possible input types.
 105                 $ids = $request->getVal( 'ids' );
 106                 if ( !is_null( $ids ) ) {
 107                         # Allow CSV, for backwards compatibility, or a single ID for show/hide links
 108                         $this->ids = explode( ',', $ids );
 109                 } else {
 110                         # Array input
 111                         $this->ids = array_keys( $request->getArray( 'ids', array() ) );
 112                 }
 113                 // $this->ids = array_map( 'intval', $this->ids );
 114                 $this->ids = array_unique( array_filter( $this->ids ) );
 115
 116                 if ( $request->getVal( 'action' ) == 'historysubmit' || $request->getVal( 'action' ) == 'revisiondelete' ) {
 117                         // For show/hide form submission from history page
 118                         // Since we are access through index.php?title=XXX&action=historysubmit
 119                         // getFullTitle() will contain the target title and not our title
 120                         $this->targetObj = $this->getFullTitle();
 121                         $this->typeName = 'revision';
 122                 } else {
 123                         $this->typeName = $request->getVal( 'type' );
 124                         $this->targetObj = Title::newFromText( $request->getText( 'target' ) );
 125                 }
 126
 127                 # For reviewing deleted files...
 128                 $this->archiveName = $request->getVal( 'file' );
 129                 $this->token = $request->getVal( 'token' );
 130                 if ( $this->archiveName && $this->targetObj ) {
 131                         $this->tryShowFile( $this->archiveName );
 132                         return;
 133                 }
 134
 135                 $this->typeName = RevisionDeleter::getCanonicalTypeName( $this->typeName );
 136
 137                 # No targets?
 138                 if ( !$this->typeName || count( $this->ids ) == 0 ) {
 139                         throw new ErrorPageError( 'revdelete-nooldid-title', 'revdelete-nooldid-text' );
 140                 }
 141                 $this->typeLabels = self::$UILabels[$this->typeName];
 142                 $this->mIsAllowed = $user->isAllowed( RevisionDeleter::getRestriction( $this->typeName ) );
 143
 144                 # Allow the list type to adjust the passed target
 145                 $this->targetObj = RevisionDeleter::suggestTarget( $this->typeName, $this->targetObj, $this->ids );
 146
 147                 $this->otherReason = $request->getVal( 'wpReason' );
 148                 # We need a target page!
 149                 if ( is_null( $this->targetObj ) ) {
 150                         $output->addWikiMsg( 'undelete-header' );
 151                         return;
 152                 }
 153                 # Give a link to the logs/hist for this page
 154                 $this->showConvenienceLinks();
 155
 156                 # Initialise checkboxes
 157                 $this->checks = array(
 158                         array( $this->typeLabels['check-label'], 'wpHidePrimary',
 159                                 RevisionDeleter::getRevdelConstant( $this->typeName )
 160                         ),
 161                         array( 'revdelete-hide-comment', 'wpHideComment', Revision::DELETED_COMMENT ),
 162                         array( 'revdelete-hide-user', 'wpHideUser', Revision::DELETED_USER )
 163                 );
 164                 if ( $user->isAllowed( 'suppressrevision' ) ) {
 165                         $this->checks[] = array( 'revdelete-hide-restricted',
 166                                 'wpHideRestricted', Revision::DELETED_RESTRICTED );
 167                 }
 168
 169                 # Either submit or create our form
 170                 if ( $this->mIsAllowed && $this->submitClicked ) {
 171                         $this->submit( $request );
 172                 } else {
 173                         $this->showForm();
 174                 }
 175
 176                 $qc = $this->getLogQueryCond();
 177                 # Show relevant lines from the deletion log
 178                 $deleteLogPage = new LogPage( 'delete' );
 179                 $output->addHTML( "<h2>" . $deleteLogPage->getName()->escaped() . "</h2>\n" );
 180                 LogEventsList::showLogExtract( $output, 'delete',
 181                         $this->targetObj, '', array( 'lim' => 25, 'conds' => $qc ) );
 182                 # Show relevant lines from the suppression log
 183                 if ( $user->isAllowed( 'suppressionlog' ) ) {
 184                         $suppressLogPage = new LogPage( 'suppress' );
 185                         $output->addHTML( "<h2>" . $suppressLogPage->getName()->escaped() . "</h2>\n" );
 186                         LogEventsList::showLogExtract( $output, 'suppress',
 187                                 $this->targetObj, '', array( 'lim' => 25, 'conds' => $qc ) );
 188                 }
 189         }
 190
 191         /**
 192          * Show some useful links in the subtitle
 193          */
 194         protected function showConvenienceLinks() {
 195                 # Give a link to the logs/hist for this page
 196                 if ( $this->targetObj ) {
 197                         // Also set header tabs to be for the target.
 198                         $this->getSkin()->setRelevantTitle( $this->targetObj );
 199
 200                         $links = array();
 201                         $links[] = Linker::linkKnown(
 202                                 SpecialPage::getTitleFor( 'Log' ),
 203                                 $this->msg( 'viewpagelogs' )->escaped(),
 204                                 array(),
 205                                 array( 'page' => $this->targetObj->getPrefixedText() )
 206                         );
 207                         if ( !$this->targetObj->isSpecialPage() ) {
 208                                 # Give a link to the page history
 209                                 $links[] = Linker::linkKnown(
 210                                         $this->targetObj,
 211                                         $this->msg( 'pagehist' )->escaped(),
 212                                         array(),
 213                                         array( 'action' => 'history' )
 214                                 );
 215                                 # Link to deleted edits
 216                                 if ( $this->getUser()->isAllowed( 'undelete' ) ) {
 217                                         $undelete = SpecialPage::getTitleFor( 'Undelete' );
 218                                         $links[] = Linker::linkKnown(
 219                                                 $undelete,
 220                                                 $this->msg( 'deletedhist' )->escaped(),
 221                                                 array(),
 222                                                 array( 'target' => $this->targetObj->getPrefixedDBkey() )
 223                                         );
 224                                 }
 225                         }
 226                         # Logs themselves don't have histories or archived revisions
 227                         $this->getOutput()->addSubtitle( $this->getLanguage()->pipeList( $links ) );
 228                 }
 229         }
 230
 231         /**
 232          * Get the condition used for fetching log snippets
 233          * @return array
 234          */
 235         protected function getLogQueryCond() {
 236                 $conds = array();
 237                 // Revision delete logs for these item
 238                 $conds['log_type'] = array( 'delete', 'suppress' );
 239                 $conds['log_action'] = $this->getList()->getLogAction();
 240                 $conds['ls_field'] = RevisionDeleter::getRelationType( $this->typeName );
 241                 $conds['ls_value'] = $this->ids;
 242                 return $conds;
 243         }
 244
 245         /**
 246          * Show a deleted file version requested by the visitor.
 247          * TODO Mostly copied from Special:Undelete. Refactor.
 248          */
 249         protected function tryShowFile( $archiveName ) {
 250                 $repo = RepoGroup::singleton()->getLocalRepo();
 251                 $oimage = $repo->newFromArchiveName( $this->targetObj, $archiveName );
 252                 $oimage->load();
 253                 // Check if user is allowed to see this file
 254                 if ( !$oimage->exists() ) {
 255                         $this->getOutput()->addWikiMsg( 'revdelete-no-file' );
 256                         return;
 257                 }
 258                 $user = $this->getUser();
 259                 if ( !$oimage->userCan( File::DELETED_FILE, $user ) ) {
 260                         if ( $oimage->isDeleted( File::DELETED_RESTRICTED ) ) {
 261                                 throw new PermissionsError( 'suppressrevision' );
 262                         } else {
 263                                 throw new PermissionsError( 'deletedtext' );
 264                         }
 265                 }
 266                 if ( !$user->matchEditToken( $this->token, $archiveName ) ) {
 267                         $lang = $this->getLanguage();
 268                         $this->getOutput()->addWikiMsg( 'revdelete-show-file-confirm',
 269                                 $this->targetObj->getText(),
 270                                 $lang->userDate( $oimage->getTimestamp(), $user ),
 271                                 $lang->userTime( $oimage->getTimestamp(), $user ) );
 272                         $this->getOutput()->addHTML(
 273                                 Xml::openElement( 'form', array(
 274                                         'method' => 'POST',
 275                                         'action' => $this->getTitle()->getLocalURL( array(
 276                                                         'target' => $this->targetObj->getPrefixedDBkey(),
 277                                                         'file' => $archiveName,
 278                                                         'token' => $user->getEditToken( $archiveName ),
 279                                                 ) )
 280                                         )
 281                                 ) .
 282                                 Xml::submitButton( $this->msg( 'revdelete-show-file-submit' )->text() ) .
 283                                 '</form>'
 284                         );
 285                         return;
 286                 }
 287                 $this->getOutput()->disable();
 288                 # We mustn't allow the output to be Squid cached, otherwise
 289                 # if an admin previews a deleted image, and it's cached, then
 290                 # a user without appropriate permissions can toddle off and
 291                 # nab the image, and Squid will serve it
 292                 $this->getRequest()->response()->header( 'Expires: ' . gmdate( 'D, d M Y H:i:s', 0 ) . ' GMT' );
 293                 $this->getRequest()->response()->header( 'Cache-Control: no-cache, no-store, max-age=0, must-revalidate' );
 294                 $this->getRequest()->response()->header( 'Pragma: no-cache' );
 295
 296                 $key = $oimage->getStorageKey();
 297                 $path = $repo->getZonePath( 'deleted' ) . '/' . $repo->getDeletedHashPath( $key ) . $key;
 298                 $repo->streamFile( $path );
 299         }
 300
 301         /**
 302          * Get the list object for this request
 303          */
 304         protected function getList() {
 305                 if ( is_null( $this->list ) ) {
 306                         $this->list = RevisionDeleter::createList(
 307                                 $this->typeName, $this->getContext(), $this->targetObj, $this->ids
 308                         );
 309                 }
 310                 return $this->list;
 311         }
 312
 313         /**
 314          * Show a list of items that we will operate on, and show a form with checkboxes
 315          * which will allow the user to choose new visibility settings.
 316          */
 317         protected function showForm() {
 318                 $UserAllowed = true;
 319
 320                 if ( $this->typeName == 'logging' ) {
 321                         $this->getOutput()->addWikiMsg( 'logdelete-selected', $this->getLanguage()->formatNum( count( $this->ids ) ) );
 322                 } else {
 323                         $this->getOutput()->addWikiMsg( 'revdelete-selected',
 324                                 $this->targetObj->getPrefixedText(), count( $this->ids ) );
 325                 }
 326
 327                 $this->getOutput()->addHTML( "<ul>" );
 328
 329                 $numRevisions = 0;
 330                 // Live revisions...
 331                 $list = $this->getList();
 332                 for ( $list->reset(); $list->current(); $list->next() ) {
 333                         $item = $list->current();
 334                         if ( !$item->canView() ) {
 335                                 if ( !$this->submitClicked ) {
 336                                         throw new PermissionsError( 'suppressrevision' );
 337                                 }
 338                                 $UserAllowed = false;
 339                         }
 340                         $numRevisions++;
 341                         $this->getOutput()->addHTML( $item->getHTML() );
 342                 }
 343
 344                 if ( !$numRevisions ) {
 345                         throw new ErrorPageError( 'revdelete-nooldid-title', 'revdelete-nooldid-text' );
 346                 }
 347
 348                 $this->getOutput()->addHTML( "</ul>" );
 349                 // Explanation text
 350                 $this->addUsageText();
 351
 352                 // Normal sysops can always see what they did, but can't always change it
 353                 if ( !$UserAllowed ) {
 354                         return;
 355                 }
 356
 357                 // Show form if the user can submit
 358                 if ( $this->mIsAllowed ) {
 359                         $out = Xml::openElement( 'form', array( 'method' => 'post',
 360                                         'action' => $this->getTitle()->getLocalURL( array( 'action' => 'submit' ) ),
 361                                         'id' => 'mw-revdel-form-revisions' ) ) .
 362                                 Xml::fieldset( $this->msg( 'revdelete-legend' )->text() ) .
 363                                 $this->buildCheckBoxes() .
 364                                 Xml::openElement( 'table' ) .
 365                                 "<tr>\n" .
 366                                         '<td class="mw-label">' .
 367                                                 Xml::label( $this->msg( 'revdelete-log' )->text(), 'wpRevDeleteReasonList' ) .
 368                                         '</td>' .
 369                                         '<td class="mw-input">' .
 370                                                 Xml::listDropDown( 'wpRevDeleteReasonList',
 371                                                         $this->msg( 'revdelete-reason-dropdown' )->inContentLanguage()->text(),
 372                                                         $this->msg( 'revdelete-reasonotherlist' )->inContentLanguage()->text(),
 373                                                         $this->getRequest()->getText( 'wpRevDeleteReasonList', 'other' ), 'wpReasonDropDown', 1
 374                                                 ) .
 375                                         '</td>' .
 376                                 "</tr><tr>\n" .
 377                                         '<td class="mw-label">' .
 378                                                 Xml::label( $this->msg( 'revdelete-otherreason' )->text(), 'wpReason' ) .
 379                                         '</td>' .
 380                                         '<td class="mw-input">' .
 381                                                 Xml::input( 'wpReason', 60, $this->otherReason, array( 'id' => 'wpReason', 'maxlength' => 100 ) ) .
 382                                         '</td>' .
 383                                 "</tr><tr>\n" .
 384                                         '<td></td>' .
 385                                         '<td class="mw-submit">' .
 386                                                 Xml::submitButton( $this->msg( 'revdelete-submit', $numRevisions )->text(),
 387                                                         array( 'name' => 'wpSubmit' ) ) .
 388                                         '</td>' .
 389                                 "</tr>\n" .
 390                                 Xml::closeElement( 'table' ) .
 391                                 Html::hidden( 'wpEditToken', $this->getUser()->getEditToken() ) .
 392                                 Html::hidden( 'target', $this->targetObj->getPrefixedText() ) .
 393                                 Html::hidden( 'type', $this->typeName ) .
 394                                 Html::hidden( 'ids', implode( ',', $this->ids ) ) .
 395                                 Xml::closeElement( 'fieldset' ) . "\n";
 396                 } else {
 397                         $out = '';
 398                 }
 399                 if ( $this->mIsAllowed ) {
 400                         $out .= Xml::closeElement( 'form' ) . "\n";
 401                         // Show link to edit the dropdown reasons
 402                         if ( $this->getUser()->isAllowed( 'editinterface' ) ) {
 403                                 $title = Title::makeTitle( NS_MEDIAWIKI, 'Revdelete-reason-dropdown' );
 404                                 $link = Linker::link(
 405                                         $title,
 406                                         $this->msg( 'revdelete-edit-reasonlist' )->escaped(),
 407                                         array(),
 408                                         array( 'action' => 'edit' )
 409                                 );
 410                                 $out .= Xml::tags( 'p', array( 'class' => 'mw-revdel-editreasons' ), $link ) . "\n";
 411                         }
 412                 }
 413                 $this->getOutput()->addHTML( $out );
 414         }
 415
 416         /**
 417          * Show some introductory text
 418          * @todo FIXME: Wikimedia-specific policy text
 419          */
 420         protected function addUsageText() {
 421                 $this->getOutput()->addWikiMsg( 'revdelete-text' );
 422                 if ( $this->getUser()->isAllowed( 'suppressrevision' ) ) {
 423                         $this->getOutput()->addWikiMsg( 'revdelete-suppress-text' );
 424                 }
 425                 if ( $this->mIsAllowed ) {
 426                         $this->getOutput()->addWikiMsg( 'revdelete-confirm' );
 427                 }
 428         }
 429
 430         /**
 431          * @return String: HTML
 432          */
 433         protected function buildCheckBoxes() {
 434                 $html = '<table>';
 435                 // If there is just one item, use checkboxes
 436                 $list = $this->getList();
 437                 if ( $list->length() == 1 ) {
 438                         $list->reset();
 439                         $bitfield = $list->current()->getBits(); // existing field
 440                         if ( $this->submitClicked ) {
 441                                 $bitfield = $this->extractBitfield( $this->extractBitParams(), $bitfield );
 442                         }
 443                         foreach ( $this->checks as $item ) {
 444                                 list( $message, $name, $field ) = $item;
 445                                 $innerHTML = Xml::checkLabel( $this->msg( $message )->text(), $name, $name, $bitfield & $field );
 446                                 if ( $field == Revision::DELETED_RESTRICTED ) {
 447                                         $innerHTML = "<b>$innerHTML</b>";
 448                                 }
 449                                 $line = Xml::tags( 'td', array( 'class' => 'mw-input' ), $innerHTML );
 450                                 $html .= "<tr>$line</tr>\n";
 451                         }
 452                 // Otherwise, use tri-state radios
 453                 } else {
 454                         $html .= '<tr>';
 455                         $html .= '<th class="mw-revdel-checkbox">' . $this->msg( 'revdelete-radio-same' )->escaped() . '</th>';
 456                         $html .= '<th class="mw-revdel-checkbox">' . $this->msg( 'revdelete-radio-unset' )->escaped() . '</th>';
 457                         $html .= '<th class="mw-revdel-checkbox">' . $this->msg( 'revdelete-radio-set' )->escaped() . '</th>';
 458                         $html .= "<th></th></tr>\n";
 459                         foreach ( $this->checks as $item ) {
 460                                 list( $message, $name, $field ) = $item;
 461                                 // If there are several items, use third state by default...
 462                                 if ( $this->submitClicked ) {
 463                                         $selected = $this->getRequest()->getInt( $name, 0 /* unchecked */ );
 464                                 } else {
 465                                         $selected = -1; // use existing field
 466                                 }
 467                                 $line = '<td class="mw-revdel-checkbox">' . Xml::radio( $name, -1, $selected == -1 ) . '</td>';
 468                                 $line .= '<td class="mw-revdel-checkbox">' . Xml::radio( $name, 0, $selected == 0 ) . '</td>';
 469                                 $line .= '<td class="mw-revdel-checkbox">' . Xml::radio( $name, 1, $selected == 1 ) . '</td>';
 470                                 $label = $this->msg( $message )->escaped();
 471                                 if ( $field == Revision::DELETED_RESTRICTED ) {
 472                                         $label = "<b>$label</b>";
 473                                 }
 474                                 $line .= "<td>$label</td>";
 475                                 $html .= "<tr>$line</tr>\n";
 476                         }
 477                 }
 478
 479                 $html .= '</table>';
 480                 return $html;
 481         }
 482
 483         /**
 484          * UI entry point for form submission.
 485          * @throws PermissionsError
 486          * @return bool
 487          */
 488         protected function submit() {
 489                 # Check edit token on submission
 490                 $token = $this->getRequest()->getVal( 'wpEditToken' );
 491                 if ( $this->submitClicked && !$this->getUser()->matchEditToken( $token ) ) {
 492                         $this->getOutput()->addWikiMsg( 'sessionfailure' );
 493                         return false;
 494                 }
 495                 $bitParams = $this->extractBitParams();
 496                 $listReason = $this->getRequest()->getText( 'wpRevDeleteReasonList', 'other' ); // from dropdown
 497                 $comment = $listReason;
 498                 if ( $comment != 'other' && $this->otherReason != '' ) {
 499                         // Entry from drop down menu + additional comment
 500                         $comment .= $this->msg( 'colon-separator' )->inContentLanguage()->text() . $this->otherReason;
 501                 } elseif ( $comment == 'other' ) {
 502                         $comment = $this->otherReason;
 503                 }
 504                 # Can the user set this field?
 505                 if ( $bitParams[Revision::DELETED_RESTRICTED] == 1 && !$this->getUser()->isAllowed( 'suppressrevision' ) ) {
 506                         throw new PermissionsError( 'suppressrevision' );
 507                 }
 508                 # If the save went through, go to success message...
 509                 $status = $this->save( $bitParams, $comment, $this->targetObj );
 510                 if ( $status->isGood() ) {
 511                         $this->success();
 512                         return true;
 513                 # ...otherwise, bounce back to form...
 514                 } else {
 515                         $this->failure( $status );
 516                 }
 517                 return false;
 518         }
 519
 520         /**
 521          * Report that the submit operation succeeded
 522          */
 523         protected function success() {
 524                 $this->getOutput()->setPageTitle( $this->msg( 'actioncomplete' ) );
 525                 $this->getOutput()->wrapWikiMsg( "<span class=\"success\">\n$1\n</span>", $this->typeLabels['success'] );
 526                 $this->list->reloadFromMaster();
 527                 $this->showForm();
 528         }
 529
 530         /**
 531          * Report that the submit operation failed
 532          */
 533         protected function failure( $status ) {
 534                 $this->getOutput()->setPageTitle( $this->msg( 'actionfailed' ) );
 535                 $this->getOutput()->addWikiText( $status->getWikiText( $this->typeLabels['failure'] ) );
 536                 $this->showForm();
 537         }
 538
 539         /**
 540          * Put together an array that contains -1, 0, or the *_deleted const for each bit
 541          *
 542          * @return array
 543          */
 544         protected function extractBitParams() {
 545                 $bitfield = array();
 546                 foreach ( $this->checks as $item ) {
 547                         list( /* message */, $name, $field ) = $item;
 548                         $val = $this->getRequest()->getInt( $name, 0 /* unchecked */ );
 549                         if ( $val < -1 || $val > 1 ) {
 550                                 $val = -1; // -1 for existing value
 551                         }
 552                         $bitfield[$field] = $val;
 553                 }
 554                 if ( !isset( $bitfield[Revision::DELETED_RESTRICTED] ) ) {
 555                         $bitfield[Revision::DELETED_RESTRICTED] = 0;
 556                 }
 557                 return $bitfield;
 558         }
 559
 560         /**
 561          * Put together a rev_deleted bitfield
 562          * @deprecated since 1.22, use RevisionDeleter::extractBitfield instead
 563          * @param array $bitPars extractBitParams() params
 564          * @param int $oldfield current bitfield
 565          * @return array
 566          */
 567         public static function extractBitfield( $bitPars, $oldfield ) {
 568                 return RevisionDeleter::extractBitfield( $bitPars, $oldfield );
 569         }
 570
 571         /**
 572          * Do the write operations. Simple wrapper for RevDel_*List::setVisibility().
 573          * @param $bitfield
 574          * @param $reason
 575          * @param $title
 576          * @return
 577          */
 578         protected function save( $bitfield, $reason, $title ) {
 579                 return $this->getList()->setVisibility(
 580                         array( 'value' => $bitfield, 'comment' => $reason )
 581                 );
 582         }
 583
 584         protected function getGroupName() {
 585                 return 'pagetools';
 586         }
 587 }