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         /** @var bool Was the DB modified in this request */
  32         protected $wasSaved = false;
  33
  34         /** @var bool True if the submit button was clicked, and the form was posted */
  35         private $submitClicked;
  36
  37         /** @var array Target ID list */
  38         private $ids;
  39
  40         /** @var string Archive name, for reviewing deleted files */
  41         private $archiveName;
  42
  43         /** @var string Edit token for securing image views against XSS */
  44         private $token;
  45
  46         /** @var Title object for target parameter */
  47         private $targetObj;
  48
  49         /** @var string Deletion type, may be revision, archive, oldimage, filearchive, logging. */
  50         private $typeName;
  51
  52         /** @var array of checkbox specs (message, name, deletion bits) */
  53         private $checks;
  54
  55         /** @var array UI Labels about the current type */
  56         private $typeLabels;
  57
  58         /** @var RevDel_List object, storing the list of items to be deleted/undeleted */
  59         private $revDelList;
  60
  61         /** @var bool Whether user is allowed to perform the action */
  62         private $mIsAllowed;
  63
  64         /** @var string */
  65         private $otherReason;
  66
  67         /**
  68          * UI labels for each type.
  69          */
  70         private static $UILabels = array(
  71                 'revision' => array(
  72                         'check-label' => 'revdelete-hide-text',
  73                         'success' => 'revdelete-success',
  74                         'failure' => 'revdelete-failure',
  75                         'text' => 'revdelete-text-text',
  76                         'selected'=> 'revdelete-selected-text',
  77                 ),
  78                 'archive' => array(
  79                         'check-label' => 'revdelete-hide-text',
  80                         'success' => 'revdelete-success',
  81                         'failure' => 'revdelete-failure',
  82                         'text' => 'revdelete-text-text',
  83                         'selected'=> 'revdelete-selected-text',
  84                 ),
  85                 'oldimage' => array(
  86                         'check-label' => 'revdelete-hide-image',
  87                         'success' => 'revdelete-success',
  88                         'failure' => 'revdelete-failure',
  89                         'text' => 'revdelete-text-file',
  90                         'selected'=> 'revdelete-selected-file',
  91                 ),
  92                 'filearchive' => array(
  93                         'check-label' => 'revdelete-hide-image',
  94                         'success' => 'revdelete-success',
  95                         'failure' => 'revdelete-failure',
  96                         'text' => 'revdelete-text-file',
  97                         'selected'=> 'revdelete-selected-file',
  98                 ),
  99                 'logging' => array(
 100                         'check-label' => 'revdelete-hide-name',
 101                         'success' => 'logdelete-success',
 102                         'failure' => 'logdelete-failure',
 103                         'text' => 'logdelete-text',
 104                         'selected' => 'logdelete-selected',
 105                 ),
 106         );
 107
 108         public function __construct() {
 109                 parent::__construct( 'Revisiondelete', 'deletedhistory' );
 110         }
 111
 112         public function execute( $par ) {
 113                 $this->checkPermissions();
 114                 $this->checkReadOnly();
 115
 116                 $output = $this->getOutput();
 117                 $user = $this->getUser();
 118
 119                 $this->setHeaders();
 120                 $this->outputHeader();
 121                 $request = $this->getRequest();
 122                 $this->submitClicked = $request->wasPosted() && $request->getBool( 'wpSubmit' );
 123                 # Handle our many different possible input types.
 124                 $ids = $request->getVal( 'ids' );
 125                 if ( !is_null( $ids ) ) {
 126                         # Allow CSV, for backwards compatibility, or a single ID for show/hide links
 127                         $this->ids = explode( ',', $ids );
 128                 } else {
 129                         # Array input
 130                         $this->ids = array_keys( $request->getArray( 'ids', array() ) );
 131                 }
 132                 // $this->ids = array_map( 'intval', $this->ids );
 133                 $this->ids = array_unique( array_filter( $this->ids ) );
 134
 135                 if ( $request->getVal( 'action' ) == 'historysubmit' || $request->getVal( 'action' ) == 'revisiondelete' ) {
 136                         // For show/hide form submission from history page
 137                         // Since we are access through index.php?title=XXX&action=historysubmit
 138                         // getFullTitle() will contain the target title and not our title
 139                         $this->targetObj = $this->getFullTitle();
 140                         $this->typeName = 'revision';
 141                 } else {
 142                         $this->typeName = $request->getVal( 'type' );
 143                         $this->targetObj = Title::newFromText( $request->getText( 'target' ) );
 144                 }
 145
 146                 # For reviewing deleted files...
 147                 $this->archiveName = $request->getVal( 'file' );
 148                 $this->token = $request->getVal( 'token' );
 149                 if ( $this->archiveName && $this->targetObj ) {
 150                         $this->tryShowFile( $this->archiveName );
 151
 152                         return;
 153                 }
 154
 155                 $this->typeName = RevisionDeleter::getCanonicalTypeName( $this->typeName );
 156
 157                 # No targets?
 158                 if ( !$this->typeName || count( $this->ids ) == 0 ) {
 159                         throw new ErrorPageError( 'revdelete-nooldid-title', 'revdelete-nooldid-text' );
 160                 }
 161                 $this->typeLabels = self::$UILabels[$this->typeName];
 162                 $this->mIsAllowed = $user->isAllowed( RevisionDeleter::getRestriction( $this->typeName ) );
 163
 164                 # Allow the list type to adjust the passed target
 165                 $this->targetObj = RevisionDeleter::suggestTarget( $this->typeName, $this->targetObj, $this->ids );
 166
 167                 $this->otherReason = $request->getVal( 'wpReason' );
 168                 # We need a target page!
 169                 if ( is_null( $this->targetObj ) ) {
 170                         $output->addWikiMsg( 'undelete-header' );
 171
 172                         return;
 173                 }
 174                 # Give a link to the logs/hist for this page
 175                 $this->showConvenienceLinks();
 176
 177                 # Initialise checkboxes
 178                 $this->checks = array(
 179                         # Messages: revdelete-hide-text, revdelete-hide-image, revdelete-hide-name
 180                         array( $this->typeLabels['check-label'], 'wpHidePrimary',
 181                                 RevisionDeleter::getRevdelConstant( $this->typeName )
 182                         ),
 183                         array( 'revdelete-hide-comment', 'wpHideComment', Revision::DELETED_COMMENT ),
 184                         array( 'revdelete-hide-user', 'wpHideUser', Revision::DELETED_USER )
 185                 );
 186                 if ( $user->isAllowed( 'suppressrevision' ) ) {
 187                         $this->checks[] = array( 'revdelete-hide-restricted',
 188                                 'wpHideRestricted', Revision::DELETED_RESTRICTED );
 189                 }
 190
 191                 # Either submit or create our form
 192                 if ( $this->mIsAllowed && $this->submitClicked ) {
 193                         $this->submit( $request );
 194                 } else {
 195                         $this->showForm();
 196                 }
 197
 198                 $qc = $this->getLogQueryCond();
 199                 # Show relevant lines from the deletion log
 200                 $deleteLogPage = new LogPage( 'delete' );
 201                 $output->addHTML( "<h2>" . $deleteLogPage->getName()->escaped() . "</h2>\n" );
 202                 LogEventsList::showLogExtract(
 203                         $output,
 204                         'delete',
 205                         $this->targetObj,
 206                         '', /* user */
 207                         array( 'lim' => 25, 'conds' => $qc, 'useMaster' => $this->wasSaved )
 208                 );
 209                 # Show relevant lines from the suppression log
 210                 if ( $user->isAllowed( 'suppressionlog' ) ) {
 211                         $suppressLogPage = new LogPage( 'suppress' );
 212                         $output->addHTML( "<h2>" . $suppressLogPage->getName()->escaped() . "</h2>\n" );
 213                         LogEventsList::showLogExtract(
 214                                 $output,
 215                                 'suppress',
 216                                 $this->targetObj,
 217                                 '',
 218                                 array( 'lim' => 25, 'conds' => $qc, 'useMaster' => $this->wasSaved )
 219                         );
 220                 }
 221         }
 222
 223         /**
 224          * Show some useful links in the subtitle
 225          */
 226         protected function showConvenienceLinks() {
 227                 # Give a link to the logs/hist for this page
 228                 if ( $this->targetObj ) {
 229                         // Also set header tabs to be for the target.
 230                         $this->getSkin()->setRelevantTitle( $this->targetObj );
 231
 232                         $links = array();
 233                         $links[] = Linker::linkKnown(
 234                                 SpecialPage::getTitleFor( 'Log' ),
 235                                 $this->msg( 'viewpagelogs' )->escaped(),
 236                                 array(),
 237                                 array( 'page' => $this->targetObj->getPrefixedText() )
 238                         );
 239                         if ( !$this->targetObj->isSpecialPage() ) {
 240                                 # Give a link to the page history
 241                                 $links[] = Linker::linkKnown(
 242                                         $this->targetObj,
 243                                         $this->msg( 'pagehist' )->escaped(),
 244                                         array(),
 245                                         array( 'action' => 'history' )
 246                                 );
 247                                 # Link to deleted edits
 248                                 if ( $this->getUser()->isAllowed( 'undelete' ) ) {
 249                                         $undelete = SpecialPage::getTitleFor( 'Undelete' );
 250                                         $links[] = Linker::linkKnown(
 251                                                 $undelete,
 252                                                 $this->msg( 'deletedhist' )->escaped(),
 253                                                 array(),
 254                                                 array( 'target' => $this->targetObj->getPrefixedDBkey() )
 255                                         );
 256                                 }
 257                         }
 258                         # Logs themselves don't have histories or archived revisions
 259                         $this->getOutput()->addSubtitle( $this->getLanguage()->pipeList( $links ) );
 260                 }
 261         }
 262
 263         /**
 264          * Get the condition used for fetching log snippets
 265          * @return array
 266          */
 267         protected function getLogQueryCond() {
 268                 $conds = array();
 269                 // Revision delete logs for these item
 270                 $conds['log_type'] = array( 'delete', 'suppress' );
 271                 $conds['log_action'] = $this->getList()->getLogAction();
 272                 $conds['ls_field'] = RevisionDeleter::getRelationType( $this->typeName );
 273                 $conds['ls_value'] = $this->ids;
 274
 275                 return $conds;
 276         }
 277
 278         /**
 279          * Show a deleted file version requested by the visitor.
 280          * TODO Mostly copied from Special:Undelete. Refactor.
 281          */
 282         protected function tryShowFile( $archiveName ) {
 283                 $repo = RepoGroup::singleton()->getLocalRepo();
 284                 $oimage = $repo->newFromArchiveName( $this->targetObj, $archiveName );
 285                 $oimage->load();
 286                 // Check if user is allowed to see this file
 287                 if ( !$oimage->exists() ) {
 288                         $this->getOutput()->addWikiMsg( 'revdelete-no-file' );
 289
 290                         return;
 291                 }
 292                 $user = $this->getUser();
 293                 if ( !$oimage->userCan( File::DELETED_FILE, $user ) ) {
 294                         if ( $oimage->isDeleted( File::DELETED_RESTRICTED ) ) {
 295                                 throw new PermissionsError( 'suppressrevision' );
 296                         } else {
 297                                 throw new PermissionsError( 'deletedtext' );
 298                         }
 299                 }
 300                 if ( !$user->matchEditToken( $this->token, $archiveName ) ) {
 301                         $lang = $this->getLanguage();
 302                         $this->getOutput()->addWikiMsg( 'revdelete-show-file-confirm',
 303                                 $this->targetObj->getText(),
 304                                 $lang->userDate( $oimage->getTimestamp(), $user ),
 305                                 $lang->userTime( $oimage->getTimestamp(), $user ) );
 306                         $this->getOutput()->addHTML(
 307                                 Xml::openElement( 'form', array(
 308                                         'method' => 'POST',
 309                                         'action' => $this->getPageTitle()->getLocalURL( array(
 310                                                         'target' => $this->targetObj->getPrefixedDBkey(),
 311                                                         'file' => $archiveName,
 312                                                         'token' => $user->getEditToken( $archiveName ),
 313                                                 ) )
 314                                         )
 315                                 ) .
 316                                 Xml::submitButton( $this->msg( 'revdelete-show-file-submit' )->text() ) .
 317                                 '</form>'
 318                         );
 319
 320                         return;
 321                 }
 322                 $this->getOutput()->disable();
 323                 # We mustn't allow the output to be Squid cached, otherwise
 324                 # if an admin previews a deleted image, and it's cached, then
 325                 # a user without appropriate permissions can toddle off and
 326                 # nab the image, and Squid will serve it
 327                 $this->getRequest()->response()->header( 'Expires: ' . gmdate( 'D, d M Y H:i:s', 0 ) . ' GMT' );
 328                 $this->getRequest()->response()->header( 'Cache-Control: no-cache, no-store, max-age=0, must-revalidate' );
 329                 $this->getRequest()->response()->header( 'Pragma: no-cache' );
 330
 331                 $key = $oimage->getStorageKey();
 332                 $path = $repo->getZonePath( 'deleted' ) . '/' . $repo->getDeletedHashPath( $key ) . $key;
 333                 $repo->streamFile( $path );
 334         }
 335
 336         /**
 337          * Get the list object for this request
 338          */
 339         protected function getList() {
 340                 if ( is_null( $this->revDelList ) ) {
 341                         $this->revDelList = RevisionDeleter::createList(
 342                                 $this->typeName, $this->getContext(), $this->targetObj, $this->ids
 343                         );
 344                 }
 345
 346                 return $this->revDelList;
 347         }
 348
 349         /**
 350          * Show a list of items that we will operate on, and show a form with checkboxes
 351          * which will allow the user to choose new visibility settings.
 352          */
 353         protected function showForm() {
 354                 $userAllowed = true;
 355
 356                 // Messages: revdelete-selected-text, revdelete-selected-file, logdelete-selected
 357                 $this->getOutput()->wrapWikiMsg( "<strong>$1</strong>", array( $this->typeLabels['selected'],
 358                         $this->getLanguage()->formatNum( count( $this->ids ) ), $this->targetObj->getPrefixedText() ) );
 359
 360                 $this->getOutput()->addHTML( "<ul>" );
 361
 362                 $numRevisions = 0;
 363                 // Live revisions...
 364                 $list = $this->getList();
 365                 for ( $list->reset(); $list->current(); $list->next() ) {
 366                         $item = $list->current();
 367                         if ( !$item->canView() ) {
 368                                 if ( !$this->submitClicked ) {
 369                                         throw new PermissionsError( 'suppressrevision' );
 370                                 }
 371                                 $userAllowed = false;
 372                         }
 373                         $numRevisions++;
 374                         $this->getOutput()->addHTML( $item->getHTML() );
 375                 }
 376
 377                 if ( !$numRevisions ) {
 378                         throw new ErrorPageError( 'revdelete-nooldid-title', 'revdelete-nooldid-text' );
 379                 }
 380
 381                 $this->getOutput()->addHTML( "</ul>" );
 382                 // Explanation text
 383                 $this->addUsageText();
 384
 385                 // Normal sysops can always see what they did, but can't always change it
 386                 if ( !$userAllowed ) {
 387                         return;
 388                 }
 389
 390                 // Show form if the user can submit
 391                 if ( $this->mIsAllowed ) {
 392                         $out = Xml::openElement( 'form', array( 'method' => 'post',
 393                                         'action' => $this->getPageTitle()->getLocalURL( array( 'action' => 'submit' ) ),
 394                                         'id' => 'mw-revdel-form-revisions' ) ) .
 395                                 Xml::fieldset( $this->msg( 'revdelete-legend' )->text() ) .
 396                                 $this->buildCheckBoxes() .
 397                                 Xml::openElement( 'table' ) .
 398                                 "<tr>\n" .
 399                                         '<td class="mw-label">' .
 400                                                 Xml::label( $this->msg( 'revdelete-log' )->text(), 'wpRevDeleteReasonList' ) .
 401                                         '</td>' .
 402                                         '<td class="mw-input">' .
 403                                                 Xml::listDropDown( 'wpRevDeleteReasonList',
 404                                                         $this->msg( 'revdelete-reason-dropdown' )->inContentLanguage()->text(),
 405                                                         $this->msg( 'revdelete-reasonotherlist' )->inContentLanguage()->text(),
 406                                                         $this->getRequest()->getText( 'wpRevDeleteReasonList', 'other' ), 'wpReasonDropDown', 1
 407                                                 ) .
 408                                         '</td>' .
 409                                 "</tr><tr>\n" .
 410                                         '<td class="mw-label">' .
 411                                                 Xml::label( $this->msg( 'revdelete-otherreason' )->text(), 'wpReason' ) .
 412                                         '</td>' .
 413                                         '<td class="mw-input">' .
 414                                                 Xml::input( 'wpReason', 60, $this->otherReason, array( 'id' => 'wpReason', 'maxlength' => 100 ) ) .
 415                                         '</td>' .
 416                                 "</tr><tr>\n" .
 417                                         '<td></td>' .
 418                                         '<td class="mw-submit">' .
 419                                                 Xml::submitButton( $this->msg( 'revdelete-submit', $numRevisions )->text(),
 420                                                         array( 'name' => 'wpSubmit' ) ) .
 421                                         '</td>' .
 422                                 "</tr>\n" .
 423                                 Xml::closeElement( 'table' ) .
 424                                 Html::hidden( 'wpEditToken', $this->getUser()->getEditToken() ) .
 425                                 Html::hidden( 'target', $this->targetObj->getPrefixedText() ) .
 426                                 Html::hidden( 'type', $this->typeName ) .
 427                                 Html::hidden( 'ids', implode( ',', $this->ids ) ) .
 428                                 Xml::closeElement( 'fieldset' ) . "\n";
 429                 } else {
 430                         $out = '';
 431                 }
 432                 if ( $this->mIsAllowed ) {
 433                         $out .= Xml::closeElement( 'form' ) . "\n";
 434                         // Show link to edit the dropdown reasons
 435                         if ( $this->getUser()->isAllowed( 'editinterface' ) ) {
 436                                 $title = Title::makeTitle( NS_MEDIAWIKI, 'Revdelete-reason-dropdown' );
 437                                 $link = Linker::link(
 438                                         $title,
 439                                         $this->msg( 'revdelete-edit-reasonlist' )->escaped(),
 440                                         array(),
 441                                         array( 'action' => 'edit' )
 442                                 );
 443                                 $out .= Xml::tags( 'p', array( 'class' => 'mw-revdel-editreasons' ), $link ) . "\n";
 444                         }
 445                 }
 446                 $this->getOutput()->addHTML( $out );
 447         }
 448
 449         /**
 450          * Show some introductory text
 451          * @todo FIXME: Wikimedia-specific policy text
 452          */
 453         protected function addUsageText() {
 454                 // Messages: revdelete-text-text, revdelete-text-file, logdelete-text
 455                 $this->getOutput()->wrapWikiMsg( "<strong>$1</strong>\n$2", $this->typeLabels['text'], 'revdelete-text-others' );
 456                 if ( $this->getUser()->isAllowed( 'suppressrevision' ) ) {
 457                         $this->getOutput()->addWikiMsg( 'revdelete-suppress-text' );
 458                 }
 459                 if ( $this->mIsAllowed ) {
 460                         $this->getOutput()->addWikiMsg( 'revdelete-confirm' );
 461                 }
 462         }
 463
 464         /**
 465          * @return String: HTML
 466          */
 467         protected function buildCheckBoxes() {
 468                 $html = '<table>';
 469                 // If there is just one item, use checkboxes
 470                 $list = $this->getList();
 471                 if ( $list->length() == 1 ) {
 472                         $list->reset();
 473                         $bitfield = $list->current()->getBits(); // existing field
 474                         if ( $this->submitClicked ) {
 475                                 $bitfield = RevisionDeleter::extractBitfield( $this->extractBitParams(), $bitfield );
 476                         }
 477                         foreach ( $this->checks as $item ) {
 478                                 // Messages: revdelete-hide-text, revdelete-hide-image, revdelete-hide-name,
 479                                 // revdelete-hide-comment, revdelete-hide-user, revdelete-hide-restricted
 480                                 list( $message, $name, $field ) = $item;
 481                                 $innerHTML = Xml::checkLabel( $this->msg( $message )->text(), $name, $name, $bitfield & $field );
 482                                 if ( $field == Revision::DELETED_RESTRICTED ) {
 483                                         $innerHTML = "<b>$innerHTML</b>";
 484                                 }
 485                                 $line = Xml::tags( 'td', array( 'class' => 'mw-input' ), $innerHTML );
 486                                 $html .= "<tr>$line</tr>\n";
 487                         }
 488                 } else {
 489                         // Otherwise, use tri-state radios
 490                         $html .= '<tr>';
 491                         $html .= '<th class="mw-revdel-checkbox">' . $this->msg( 'revdelete-radio-same' )->escaped() . '</th>';
 492                         $html .= '<th class="mw-revdel-checkbox">' . $this->msg( 'revdelete-radio-unset' )->escaped() . '</th>';
 493                         $html .= '<th class="mw-revdel-checkbox">' . $this->msg( 'revdelete-radio-set' )->escaped() . '</th>';
 494                         $html .= "<th></th></tr>\n";
 495                         foreach ( $this->checks as $item ) {
 496                                 // Messages: revdelete-hide-text, revdelete-hide-image, revdelete-hide-name,
 497                                 // revdelete-hide-comment, revdelete-hide-user, revdelete-hide-restricted
 498                                 list( $message, $name, $field ) = $item;
 499                                 // If there are several items, use third state by default...
 500                                 if ( $this->submitClicked ) {
 501                                         $selected = $this->getRequest()->getInt( $name, 0 /* unchecked */ );
 502                                 } else {
 503                                         $selected = -1; // use existing field
 504                                 }
 505                                 $line = '<td class="mw-revdel-checkbox">' . Xml::radio( $name, -1, $selected == -1 ) . '</td>';
 506                                 $line .= '<td class="mw-revdel-checkbox">' . Xml::radio( $name, 0, $selected == 0 ) . '</td>';
 507                                 $line .= '<td class="mw-revdel-checkbox">' . Xml::radio( $name, 1, $selected == 1 ) . '</td>';
 508                                 $label = $this->msg( $message )->escaped();
 509                                 if ( $field == Revision::DELETED_RESTRICTED ) {
 510                                         $label = "<b>$label</b>";
 511                                 }
 512                                 $line .= "<td>$label</td>";
 513                                 $html .= "<tr>$line</tr>\n";
 514                         }
 515                 }
 516
 517                 $html .= '</table>';
 518
 519                 return $html;
 520         }
 521
 522         /**
 523          * UI entry point for form submission.
 524          * @throws PermissionsError
 525          * @return bool
 526          */
 527         protected function submit() {
 528                 # Check edit token on submission
 529                 $token = $this->getRequest()->getVal( 'wpEditToken' );
 530                 if ( $this->submitClicked && !$this->getUser()->matchEditToken( $token ) ) {
 531                         $this->getOutput()->addWikiMsg( 'sessionfailure' );
 532
 533                         return false;
 534                 }
 535                 $bitParams = $this->extractBitParams();
 536                 $listReason = $this->getRequest()->getText( 'wpRevDeleteReasonList', 'other' ); // from dropdown
 537                 $comment = $listReason;
 538                 if ( $comment != 'other' && $this->otherReason != '' ) {
 539                         // Entry from drop down menu + additional comment
 540                         $comment .= $this->msg( 'colon-separator' )->inContentLanguage()->text() . $this->otherReason;
 541                 } elseif ( $comment == 'other' ) {
 542                         $comment = $this->otherReason;
 543                 }
 544                 # Can the user set this field?
 545                 if ( $bitParams[Revision::DELETED_RESTRICTED] == 1 && !$this->getUser()->isAllowed( 'suppressrevision' ) ) {
 546                         throw new PermissionsError( 'suppressrevision' );
 547                 }
 548                 # If the save went through, go to success message...
 549                 $status = $this->save( $bitParams, $comment, $this->targetObj );
 550                 if ( $status->isGood() ) {
 551                         $this->success();
 552
 553                         return true;
 554                 } else {
 555                         # ...otherwise, bounce back to form...
 556                         $this->failure( $status );
 557                 }
 558
 559                 return false;
 560         }
 561
 562         /**
 563          * Report that the submit operation succeeded
 564          */
 565         protected function success() {
 566                 // Messages: revdelete-success, logdelete-success
 567                 $this->getOutput()->setPageTitle( $this->msg( 'actioncomplete' ) );
 568                 $this->getOutput()->wrapWikiMsg( "<span class=\"success\">\n$1\n</span>", $this->typeLabels['success'] );
 569                 $this->wasSaved = true;
 570                 $this->revDelList->reloadFromMaster();
 571                 $this->showForm();
 572         }
 573
 574         /**
 575          * Report that the submit operation failed
 576          */
 577         protected function failure( $status ) {
 578                 // Messages: revdelete-failure, logdelete-failure
 579                 $this->getOutput()->setPageTitle( $this->msg( 'actionfailed' ) );
 580                 $this->getOutput()->addWikiText( $status->getWikiText( $this->typeLabels['failure'] ) );
 581                 $this->showForm();
 582         }
 583
 584         /**
 585          * Put together an array that contains -1, 0, or the *_deleted const for each bit
 586          *
 587          * @return array
 588          */
 589         protected function extractBitParams() {
 590                 $bitfield = array();
 591                 foreach ( $this->checks as $item ) {
 592                         list( /* message */, $name, $field ) = $item;
 593                         $val = $this->getRequest()->getInt( $name, 0 /* unchecked */ );
 594                         if ( $val < -1 || $val > 1 ) {
 595                                 $val = -1; // -1 for existing value
 596                         }
 597                         $bitfield[$field] = $val;
 598                 }
 599                 if ( !isset( $bitfield[Revision::DELETED_RESTRICTED] ) ) {
 600                         $bitfield[Revision::DELETED_RESTRICTED] = 0;
 601                 }
 602
 603                 return $bitfield;
 604         }
 605
 606         /**
 607          * Do the write operations. Simple wrapper for RevDel_*List::setVisibility().
 608          * @param $bitfield
 609          * @param $reason
 610          * @param $title
 611          * @return Status
 612          */
 613         protected function save( $bitfield, $reason, $title ) {
 614                 return $this->getList()->setVisibility(
 615                         array( 'value' => $bitfield, 'comment' => $reason )
 616                 );
 617         }
 618
 619         protected function getGroupName() {
 620                 return 'pagetools';
 621         }
 622 }