includes/specials/SpecialUndelete.php

   1 <?php
   2 /**
   3  * Implements Special:Undelete
   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 use MediaWiki\MediaWikiServices;
  25 use MediaWiki\Revision\RevisionRecord;
  26 use MediaWiki\Storage\NameTableAccessException;
  27 use Wikimedia\Rdbms\IResultWrapper;
  28
  29 /**
  30  * Special page allowing users with the appropriate permissions to view
  31  * and restore deleted content.
  32  *
  33  * @ingroup SpecialPage
  34  */
  35 class SpecialUndelete extends SpecialPage {
  36         private $mAction;
  37         private $mTarget;
  38         private $mTimestamp;
  39         private $mRestore;
  40         private $mRevdel;
  41         private $mInvert;
  42         private $mFilename;
  43         private $mTargetTimestamp;
  44         private $mAllowed;
  45         private $mCanView;
  46         private $mComment;
  47         private $mToken;
  48
  49         /** @var Title */
  50         private $mTargetObj;
  51         /**
  52          * @var string Search prefix
  53          */
  54         private $mSearchPrefix;
  55
  56         function __construct() {
  57                 parent::__construct( 'Undelete', 'deletedhistory' );
  58         }
  59
  60         public function doesWrites() {
  61                 return true;
  62         }
  63
  64         function loadRequest( $par ) {
  65                 $request = $this->getRequest();
  66                 $user = $this->getUser();
  67
  68                 $this->mAction = $request->getVal( 'action' );
  69                 if ( $par !== null && $par !== '' ) {
  70                         $this->mTarget = $par;
  71                 } else {
  72                         $this->mTarget = $request->getVal( 'target' );
  73                 }
  74
  75                 $this->mTargetObj = null;
  76
  77                 if ( $this->mTarget !== null && $this->mTarget !== '' ) {
  78                         $this->mTargetObj = Title::newFromText( $this->mTarget );
  79                 }
  80
  81                 $this->mSearchPrefix = $request->getText( 'prefix' );
  82                 $time = $request->getVal( 'timestamp' );
  83                 $this->mTimestamp = $time ? wfTimestamp( TS_MW, $time ) : '';
  84                 $this->mFilename = $request->getVal( 'file' );
  85
  86                 $posted = $request->wasPosted() &&
  87                         $user->matchEditToken( $request->getVal( 'wpEditToken' ) );
  88                 $this->mRestore = $request->getCheck( 'restore' ) && $posted;
  89                 $this->mRevdel = $request->getCheck( 'revdel' ) && $posted;
  90                 $this->mInvert = $request->getCheck( 'invert' ) && $posted;
  91                 $this->mPreview = $request->getCheck( 'preview' ) && $posted;
  92                 $this->mDiff = $request->getCheck( 'diff' );
  93                 $this->mDiffOnly = $request->getBool( 'diffonly', $this->getUser()->getOption( 'diffonly' ) );
  94                 $this->mComment = $request->getText( 'wpComment' );
  95                 $this->mUnsuppress = $request->getVal( 'wpUnsuppress' ) && $user->isAllowed( 'suppressrevision' );
  96                 $this->mToken = $request->getVal( 'token' );
  97
  98                 $block = $user->getBlock();
  99                 if ( $this->isAllowed( 'undelete' ) && !( $block && $block->isSitewide() ) ) {
 100                         $this->mAllowed = true; // user can restore
 101                         $this->mCanView = true; // user can view content
 102                 } elseif ( $this->isAllowed( 'deletedtext' ) ) {
 103                         $this->mAllowed = false; // user cannot restore
 104                         $this->mCanView = true; // user can view content
 105                         $this->mRestore = false;
 106                 } else { // user can only view the list of revisions
 107                         $this->mAllowed = false;
 108                         $this->mCanView = false;
 109                         $this->mTimestamp = '';
 110                         $this->mRestore = false;
 111                 }
 112
 113                 if ( $this->mRestore || $this->mInvert ) {
 114                         $timestamps = [];
 115                         $this->mFileVersions = [];
 116                         foreach ( $request->getValues() as $key => $val ) {
 117                                 $matches = [];
 118                                 if ( preg_match( '/^ts(\d{14})$/', $key, $matches ) ) {
 119                                         array_push( $timestamps, $matches[1] );
 120                                 }
 121
 122                                 if ( preg_match( '/^fileid(\d+)$/', $key, $matches ) ) {
 123                                         $this->mFileVersions[] = intval( $matches[1] );
 124                                 }
 125                         }
 126                         rsort( $timestamps );
 127                         $this->mTargetTimestamp = $timestamps;
 128                 }
 129         }
 130
 131         /**
 132          * Checks whether a user is allowed the permission for the
 133          * specific title if one is set.
 134          *
 135          * @param string $permission
 136          * @param User|null $user
 137          * @return bool
 138          */
 139         protected function isAllowed( $permission, User $user = null ) {
 140                 $user = $user ?: $this->getUser();
 141                 if ( $this->mTargetObj !== null ) {
 142                         return $this->mTargetObj->userCan( $permission, $user );
 143                 } else {
 144                         return $user->isAllowed( $permission );
 145                 }
 146         }
 147
 148         function userCanExecute( User $user ) {
 149                 return $this->isAllowed( $this->mRestriction, $user );
 150         }
 151
 152         function execute( $par ) {
 153                 $this->useTransactionalTimeLimit();
 154
 155                 $user = $this->getUser();
 156
 157                 $this->setHeaders();
 158                 $this->outputHeader();
 159
 160                 $this->loadRequest( $par );
 161                 $this->checkPermissions(); // Needs to be after mTargetObj is set
 162
 163                 $out = $this->getOutput();
 164
 165                 if ( is_null( $this->mTargetObj ) ) {
 166                         $out->addWikiMsg( 'undelete-header' );
 167
 168                         # Not all users can just browse every deleted page from the list
 169                         if ( $user->isAllowed( 'browsearchive' ) ) {
 170                                 $this->showSearchForm();
 171                         }
 172
 173                         return;
 174                 }
 175
 176                 $this->addHelpLink( 'Help:Undelete' );
 177                 if ( $this->mAllowed ) {
 178                         $out->setPageTitle( $this->msg( 'undeletepage' ) );
 179                 } else {
 180                         $out->setPageTitle( $this->msg( 'viewdeletedpage' ) );
 181                 }
 182
 183                 $this->getSkin()->setRelevantTitle( $this->mTargetObj );
 184
 185                 if ( $this->mTimestamp !== '' ) {
 186                         $this->showRevision( $this->mTimestamp );
 187                 } elseif ( $this->mFilename !== null && $this->mTargetObj->inNamespace( NS_FILE ) ) {
 188                         $file = new ArchivedFile( $this->mTargetObj, '', $this->mFilename );
 189                         // Check if user is allowed to see this file
 190                         if ( !$file->exists() ) {
 191                                 $out->addWikiMsg( 'filedelete-nofile', $this->mFilename );
 192                         } elseif ( !$file->userCan( File::DELETED_FILE, $user ) ) {
 193                                 if ( $file->isDeleted( File::DELETED_RESTRICTED ) ) {
 194                                         throw new PermissionsError( 'suppressrevision' );
 195                                 } else {
 196                                         throw new PermissionsError( 'deletedtext' );
 197                                 }
 198                         } elseif ( !$user->matchEditToken( $this->mToken, $this->mFilename ) ) {
 199                                 $this->showFileConfirmationForm( $this->mFilename );
 200                         } else {
 201                                 $this->showFile( $this->mFilename );
 202                         }
 203                 } elseif ( $this->mAction === 'submit' ) {
 204                         if ( $this->mRestore ) {
 205                                 $this->undelete();
 206                         } elseif ( $this->mRevdel ) {
 207                                 $this->redirectToRevDel();
 208                         }
 209
 210                 } else {
 211                         $this->showHistory();
 212                 }
 213         }
 214
 215         /**
 216          * Convert submitted form data to format expected by RevisionDelete and
 217          * redirect the request
 218          */
 219         private function redirectToRevDel() {
 220                 $archive = new PageArchive( $this->mTargetObj );
 221
 222                 $revisions = [];
 223
 224                 foreach ( $this->getRequest()->getValues() as $key => $val ) {
 225                         $matches = [];
 226                         if ( preg_match( "/^ts(\d{14})$/", $key, $matches ) ) {
 227                                 $revisions[$archive->getRevision( $matches[1] )->getId()] = 1;
 228                         }
 229                 }
 230
 231                 $query = [
 232                         'type' => 'revision',
 233                         'ids' => $revisions,
 234                         'target' => $this->mTargetObj->getPrefixedText()
 235                 ];
 236                 $url = SpecialPage::getTitleFor( 'Revisiondelete' )->getFullURL( $query );
 237                 $this->getOutput()->redirect( $url );
 238         }
 239
 240         function showSearchForm() {
 241                 $out = $this->getOutput();
 242                 $out->setPageTitle( $this->msg( 'undelete-search-title' ) );
 243                 $fuzzySearch = $this->getRequest()->getVal( 'fuzzy', true );
 244
 245                 $out->enableOOUI();
 246
 247                 $fields[] = new OOUI\ActionFieldLayout(
 248                         new OOUI\TextInputWidget( [
 249                                 'name' => 'prefix',
 250                                 'inputId' => 'prefix',
 251                                 'infusable' => true,
 252                                 'value' => $this->mSearchPrefix,
 253                                 'autofocus' => true,
 254                         ] ),
 255                         new OOUI\ButtonInputWidget( [
 256                                 'label' => $this->msg( 'undelete-search-submit' )->text(),
 257                                 'flags' => [ 'primary', 'progressive' ],
 258                                 'inputId' => 'searchUndelete',
 259                                 'type' => 'submit',
 260                         ] ),
 261                         [
 262                                 'label' => new OOUI\HtmlSnippet(
 263                                         $this->msg(
 264                                                 $fuzzySearch ? 'undelete-search-full' : 'undelete-search-prefix'
 265                                         )->parse()
 266                                 ),
 267                                 'align' => 'left',
 268                         ]
 269                 );
 270
 271                 $fieldset = new OOUI\FieldsetLayout( [
 272                         'label' => $this->msg( 'undelete-search-box' )->text(),
 273                         'items' => $fields,
 274                 ] );
 275
 276                 $form = new OOUI\FormLayout( [
 277                         'method' => 'get',
 278                         'action' => wfScript(),
 279                 ] );
 280
 281                 $form->appendContent(
 282                         $fieldset,
 283                         new OOUI\HtmlSnippet(
 284                                 Html::hidden( 'title', $this->getPageTitle()->getPrefixedDBkey() ) .
 285                                 Html::hidden( 'fuzzy', $fuzzySearch )
 286                         )
 287                 );
 288
 289                 $out->addHTML(
 290                         new OOUI\PanelLayout( [
 291                                 'expanded' => false,
 292                                 'padded' => true,
 293                                 'framed' => true,
 294                                 'content' => $form,
 295                         ] )
 296                 );
 297
 298                 # List undeletable articles
 299                 if ( $this->mSearchPrefix ) {
 300                         // For now, we enable search engine match only when specifically asked to
 301                         // by using fuzzy=1 parameter.
 302                         if ( $fuzzySearch ) {
 303                                 $result = PageArchive::listPagesBySearch( $this->mSearchPrefix );
 304                         } else {
 305                                 $result = PageArchive::listPagesByPrefix( $this->mSearchPrefix );
 306                         }
 307                         $this->showList( $result );
 308                 }
 309         }
 310
 311         /**
 312          * Generic list of deleted pages
 313          *
 314          * @param IResultWrapper $result
 315          * @return bool
 316          */
 317         private function showList( $result ) {
 318                 $out = $this->getOutput();
 319
 320                 if ( $result->numRows() == 0 ) {
 321                         $out->addWikiMsg( 'undelete-no-results' );
 322
 323                         return false;
 324                 }
 325
 326                 $out->addWikiMsg( 'undeletepagetext', $this->getLanguage()->formatNum( $result->numRows() ) );
 327
 328                 $linkRenderer = $this->getLinkRenderer();
 329                 $undelete = $this->getPageTitle();
 330                 $out->addHTML( "<ul id='undeleteResultsList'>\n" );
 331                 foreach ( $result as $row ) {
 332                         $title = Title::makeTitleSafe( $row->ar_namespace, $row->ar_title );
 333                         if ( $title !== null ) {
 334                                 $item = $linkRenderer->makeKnownLink(
 335                                         $undelete,
 336                                         $title->getPrefixedText(),
 337                                         [],
 338                                         [ 'target' => $title->getPrefixedText() ]
 339                                 );
 340                         } else {
 341                                 // The title is no longer valid, show as text
 342                                 $item = Html::element(
 343                                         'span',
 344                                         [ 'class' => 'mw-invalidtitle' ],
 345                                         Linker::getInvalidTitleDescription(
 346                                                 $this->getContext(),
 347                                                 $row->ar_namespace,
 348                                                 $row->ar_title
 349                                         )
 350                                 );
 351                         }
 352                         $revs = $this->msg( 'undeleterevisions' )->numParams( $row->count )->parse();
 353                         $out->addHTML(
 354                                 Html::rawElement(
 355                                         'li',
 356                                         [ 'class' => 'undeleteResult' ],
 357                                         "{$item} ({$revs})"
 358                                 )
 359                         );
 360                 }
 361                 $result->free();
 362                 $out->addHTML( "</ul>\n" );
 363
 364                 return true;
 365         }
 366
 367         private function showRevision( $timestamp ) {
 368                 if ( !preg_match( '/[0-9]{14}/', $timestamp ) ) {
 369                         return;
 370                 }
 371
 372                 $archive = new PageArchive( $this->mTargetObj, $this->getConfig() );
 373                 if ( !Hooks::run( 'UndeleteForm::showRevision', [ &$archive, $this->mTargetObj ] ) ) {
 374                         return;
 375                 }
 376                 $rev = $archive->getRevision( $timestamp );
 377
 378                 $out = $this->getOutput();
 379                 $user = $this->getUser();
 380
 381                 if ( !$rev ) {
 382                         $out->addWikiMsg( 'undeleterevision-missing' );
 383
 384                         return;
 385                 }
 386
 387                 if ( $rev->isDeleted( Revision::DELETED_TEXT ) ) {
 388                         if ( !$rev->userCan( Revision::DELETED_TEXT, $user ) ) {
 389                                 $out->wrapWikiMsg(
 390                                         "<div class='mw-warning plainlinks'>\n$1\n</div>\n",
 391                                 $rev->isDeleted( Revision::DELETED_RESTRICTED ) ?
 392                                         'rev-suppressed-text-permission' : 'rev-deleted-text-permission'
 393                                 );
 394
 395                                 return;
 396                         }
 397
 398                         $out->wrapWikiMsg(
 399                                 "<div class='mw-warning plainlinks'>\n$1\n</div>\n",
 400                                 $rev->isDeleted( Revision::DELETED_RESTRICTED ) ?
 401                                         'rev-suppressed-text-view' : 'rev-deleted-text-view'
 402                         );
 403                         $out->addHTML( '<br />' );
 404                         // and we are allowed to see...
 405                 }
 406
 407                 if ( $this->mDiff ) {
 408                         $previousRev = $archive->getPreviousRevision( $timestamp );
 409                         if ( $previousRev ) {
 410                                 $this->showDiff( $previousRev, $rev );
 411                                 if ( $this->mDiffOnly ) {
 412                                         return;
 413                                 }
 414
 415                                 $out->addHTML( '<hr />' );
 416                         } else {
 417                                 $out->addWikiMsg( 'undelete-nodiff' );
 418                         }
 419                 }
 420
 421                 $link = $this->getLinkRenderer()->makeKnownLink(
 422                         $this->getPageTitle( $this->mTargetObj->getPrefixedDBkey() ),
 423                         $this->mTargetObj->getPrefixedText()
 424                 );
 425
 426                 $lang = $this->getLanguage();
 427
 428                 // date and time are separate parameters to facilitate localisation.
 429                 // $time is kept for backward compat reasons.
 430                 $time = $lang->userTimeAndDate( $timestamp, $user );
 431                 $d = $lang->userDate( $timestamp, $user );
 432                 $t = $lang->userTime( $timestamp, $user );
 433                 $userLink = Linker::revUserTools( $rev );
 434
 435                 $content = $rev->getContent( RevisionRecord::FOR_THIS_USER, $user );
 436
 437                 // TODO: MCR: this will have to become something like $hasTextSlots and $hasNonTextSlots
 438                 $isText = ( $content instanceof TextContent );
 439
 440                 if ( $this->mPreview || $isText ) {
 441                         $openDiv = '<div id="mw-undelete-revision" class="mw-warning">';
 442                 } else {
 443                         $openDiv = '<div id="mw-undelete-revision">';
 444                 }
 445                 $out->addHTML( $openDiv );
 446
 447                 // Revision delete links
 448                 if ( !$this->mDiff ) {
 449                         $revdel = Linker::getRevDeleteLink( $user, $rev, $this->mTargetObj );
 450                         if ( $revdel ) {
 451                                 $out->addHTML( "$revdel " );
 452                         }
 453                 }
 454
 455                 $out->addWikiMsg(
 456                         'undelete-revision',
 457                         Message::rawParam( $link ), $time,
 458                         Message::rawParam( $userLink ), $d, $t
 459                 );
 460                 $out->addHTML( '</div>' );
 461
 462                 if ( !Hooks::run( 'UndeleteShowRevision', [ $this->mTargetObj, $rev ] ) ) {
 463                         return;
 464                 }
 465
 466                 if ( $this->mPreview || !$isText ) {
 467                         // NOTE: non-text content has no source view, so always use rendered preview
 468
 469                         $popts = $out->parserOptions();
 470                         $renderer = MediaWikiServices::getInstance()->getRevisionRenderer();
 471
 472                         $rendered = $renderer->getRenderedRevision(
 473                                 $rev->getRevisionRecord(),
 474                                 $popts,
 475                                 $user,
 476                                 [ 'audience' => RevisionRecord::FOR_THIS_USER ]
 477                         );
 478
 479                         // Fail hard if the audience check fails, since we already checked
 480                         // at the beginning of this method.
 481                         $pout = $rendered->getRevisionParserOutput();
 482
 483                         $out->addParserOutput( $pout, [
 484                                 'enableSectionEditLinks' => false,
 485                         ] );
 486                 }
 487
 488                 $out->enableOOUI();
 489                 $buttonFields = [];
 490
 491                 if ( $isText ) {
 492                         // TODO: MCR: make this work for multiple slots
 493                         // source view for textual content
 494                         $sourceView = Xml::element( 'textarea', [
 495                                 'readonly' => 'readonly',
 496                                 'cols' => 80,
 497                                 'rows' => 25
 498                         ], $content->getText() . "\n" );
 499
 500                         $buttonFields[] = new OOUI\ButtonInputWidget( [
 501                                 'type' => 'submit',
 502                                 'name' => 'preview',
 503                                 'label' => $this->msg( 'showpreview' )->text()
 504                         ] );
 505                 } else {
 506                         $sourceView = '';
 507                 }
 508
 509                 $buttonFields[] = new OOUI\ButtonInputWidget( [
 510                         'name' => 'diff',
 511                         'type' => 'submit',
 512                         'label' => $this->msg( 'showdiff' )->text()
 513                 ] );
 514
 515                 $out->addHTML(
 516                         $sourceView .
 517                                 Xml::openElement( 'div', [
 518                                         'style' => 'clear: both' ] ) .
 519                                 Xml::openElement( 'form', [
 520                                         'method' => 'post',
 521                                         'action' => $this->getPageTitle()->getLocalURL( [ 'action' => 'submit' ] ) ] ) .
 522                                 Xml::element( 'input', [
 523                                         'type' => 'hidden',
 524                                         'name' => 'target',
 525                                         'value' => $this->mTargetObj->getPrefixedDBkey() ] ) .
 526                                 Xml::element( 'input', [
 527                                         'type' => 'hidden',
 528                                         'name' => 'timestamp',
 529                                         'value' => $timestamp ] ) .
 530                                 Xml::element( 'input', [
 531                                         'type' => 'hidden',
 532                                         'name' => 'wpEditToken',
 533                                         'value' => $user->getEditToken() ] ) .
 534                                 new OOUI\FieldLayout(
 535                                         new OOUI\Widget( [
 536                                                 'content' => new OOUI\HorizontalLayout( [
 537                                                         'items' => $buttonFields
 538                                                 ] )
 539                                         ] )
 540                                 ) .
 541                                 Xml::closeElement( 'form' ) .
 542                                 Xml::closeElement( 'div' )
 543                 );
 544         }
 545
 546         /**
 547          * Build a diff display between this and the previous either deleted
 548          * or non-deleted edit.
 549          *
 550          * @param Revision $previousRev
 551          * @param Revision $currentRev
 552          */
 553         function showDiff( $previousRev, $currentRev ) {
 554                 $diffContext = clone $this->getContext();
 555                 $diffContext->setTitle( $currentRev->getTitle() );
 556                 $diffContext->setWikiPage( WikiPage::factory( $currentRev->getTitle() ) );
 557
 558                 $diffEngine = $currentRev->getContentHandler()->createDifferenceEngine( $diffContext );
 559                 $diffEngine->setRevisions( $previousRev->getRevisionRecord(), $currentRev->getRevisionRecord() );
 560                 $diffEngine->showDiffStyle();
 561                 $formattedDiff = $diffEngine->getDiff(
 562                         $this->diffHeader( $previousRev, 'o' ),
 563                         $this->diffHeader( $currentRev, 'n' )
 564                 );
 565
 566                 $this->getOutput()->addHTML( "<div>$formattedDiff</div>\n" );
 567         }
 568
 569         /**
 570          * @param Revision $rev
 571          * @param string $prefix
 572          * @return string
 573          */
 574         private function diffHeader( $rev, $prefix ) {
 575                 $isDeleted = !( $rev->getId() && $rev->getTitle() );
 576                 if ( $isDeleted ) {
 577                         /// @todo FIXME: $rev->getTitle() is null for deleted revs...?
 578                         $targetPage = $this->getPageTitle();
 579                         $targetQuery = [
 580                                 'target' => $this->mTargetObj->getPrefixedText(),
 581                                 'timestamp' => wfTimestamp( TS_MW, $rev->getTimestamp() )
 582                         ];
 583                 } else {
 584                         /// @todo FIXME: getId() may return non-zero for deleted revs...
 585                         $targetPage = $rev->getTitle();
 586                         $targetQuery = [ 'oldid' => $rev->getId() ];
 587                 }
 588
 589                 // Add show/hide deletion links if available
 590                 $user = $this->getUser();
 591                 $lang = $this->getLanguage();
 592                 $rdel = Linker::getRevDeleteLink( $user, $rev, $this->mTargetObj );
 593
 594                 if ( $rdel ) {
 595                         $rdel = " $rdel";
 596                 }
 597
 598                 $minor = $rev->isMinor() ? ChangesList::flag( 'minor' ) : '';
 599
 600                 $tagIds = wfGetDB( DB_REPLICA )->selectFieldValues(
 601                         'change_tag',
 602                         'ct_tag_id',
 603                         [ 'ct_rev_id' => $rev->getId() ],
 604                         __METHOD__
 605                 );
 606                 $tags = [];
 607                 $changeTagDefStore = MediaWikiServices::getInstance()->getChangeTagDefStore();
 608                 foreach ( $tagIds as $tagId ) {
 609                         try {
 610                                 $tags[] = $changeTagDefStore->getName( (int)$tagId );
 611                         } catch ( NameTableAccessException $exception ) {
 612                                 continue;
 613                         }
 614                 }
 615                 $tags = implode( ',', $tags );
 616                 $tagSummary = ChangeTags::formatSummaryRow( $tags, 'deleteddiff', $this->getContext() );
 617
 618                 // FIXME This is reimplementing DifferenceEngine#getRevisionHeader
 619                 // and partially #showDiffPage, but worse
 620                 return '<div id="mw-diff-' . $prefix . 'title1"><strong>' .
 621                         $this->getLinkRenderer()->makeLink(
 622                                 $targetPage,
 623                                 $this->msg(
 624                                         'revisionasof',
 625                                         $lang->userTimeAndDate( $rev->getTimestamp(), $user ),
 626                                         $lang->userDate( $rev->getTimestamp(), $user ),
 627                                         $lang->userTime( $rev->getTimestamp(), $user )
 628                                 )->text(),
 629                                 [],
 630                                 $targetQuery
 631                         ) .
 632                         '</strong></div>' .
 633                         '<div id="mw-diff-' . $prefix . 'title2">' .
 634                         Linker::revUserTools( $rev ) . '<br />' .
 635                         '</div>' .
 636                         '<div id="mw-diff-' . $prefix . 'title3">' .
 637                         $minor . Linker::revComment( $rev ) . $rdel . '<br />' .
 638                         '</div>' .
 639                         '<div id="mw-diff-' . $prefix . 'title5">' .
 640                         $tagSummary[0] . '<br />' .
 641                         '</div>';
 642         }
 643
 644         /**
 645          * Show a form confirming whether a tokenless user really wants to see a file
 646          * @param string $key
 647          */
 648         private function showFileConfirmationForm( $key ) {
 649                 $out = $this->getOutput();
 650                 $lang = $this->getLanguage();
 651                 $user = $this->getUser();
 652                 $file = new ArchivedFile( $this->mTargetObj, '', $this->mFilename );
 653                 $out->addWikiMsg( 'undelete-show-file-confirm',
 654                         $this->mTargetObj->getText(),
 655                         $lang->userDate( $file->getTimestamp(), $user ),
 656                         $lang->userTime( $file->getTimestamp(), $user ) );
 657                 $out->addHTML(
 658                         Xml::openElement( 'form', [
 659                                         'method' => 'POST',
 660                                         'action' => $this->getPageTitle()->getLocalURL( [
 661                                                 'target' => $this->mTarget,
 662                                                 'file' => $key,
 663                                                 'token' => $user->getEditToken( $key ),
 664                                         ] ),
 665                                 ]
 666                         ) .
 667                                 Xml::submitButton( $this->msg( 'undelete-show-file-submit' )->text() ) .
 668                                 '</form>'
 669                 );
 670         }
 671
 672         /**
 673          * Show a deleted file version requested by the visitor.
 674          * @param string $key
 675          */
 676         private function showFile( $key ) {
 677                 $this->getOutput()->disable();
 678
 679                 # We mustn't allow the output to be CDN cached, otherwise
 680                 # if an admin previews a deleted image, and it's cached, then
 681                 # a user without appropriate permissions can toddle off and
 682                 # nab the image, and CDN will serve it
 683                 $response = $this->getRequest()->response();
 684                 $response->header( 'Expires: ' . gmdate( 'D, d M Y H:i:s', 0 ) . ' GMT' );
 685                 $response->header( 'Cache-Control: no-cache, no-store, max-age=0, must-revalidate' );
 686                 $response->header( 'Pragma: no-cache' );
 687
 688                 $repo = RepoGroup::singleton()->getLocalRepo();
 689                 $path = $repo->getZonePath( 'deleted' ) . '/' . $repo->getDeletedHashPath( $key ) . $key;
 690                 $repo->streamFileWithStatus( $path );
 691         }
 692
 693         protected function showHistory() {
 694                 $this->checkReadOnly();
 695
 696                 $out = $this->getOutput();
 697                 if ( $this->mAllowed ) {
 698                         $out->addModules( 'mediawiki.special.undelete' );
 699                 }
 700                 $out->wrapWikiMsg(
 701                         "<div class='mw-undelete-pagetitle'>\n$1\n</div>\n",
 702                         [ 'undeletepagetitle', wfEscapeWikiText( $this->mTargetObj->getPrefixedText() ) ]
 703                 );
 704
 705                 $archive = new PageArchive( $this->mTargetObj, $this->getConfig() );
 706                 Hooks::run( 'UndeleteForm::showHistory', [ &$archive, $this->mTargetObj ] );
 707
 708                 $out->addHTML( '<div class="mw-undelete-history">' );
 709                 if ( $this->mAllowed ) {
 710                         $out->addWikiMsg( 'undeletehistory' );
 711                         $out->addWikiMsg( 'undeleterevdel' );
 712                 } else {
 713                         $out->addWikiMsg( 'undeletehistorynoadmin' );
 714                 }
 715                 $out->addHTML( '</div>' );
 716
 717                 # List all stored revisions
 718                 $revisions = $archive->listRevisions();
 719                 $files = $archive->listFiles();
 720
 721                 $haveRevisions = $revisions && $revisions->numRows() > 0;
 722                 $haveFiles = $files && $files->numRows() > 0;
 723
 724                 # Batch existence check on user and talk pages
 725                 if ( $haveRevisions ) {
 726                         $batch = new LinkBatch();
 727                         foreach ( $revisions as $row ) {
 728                                 $batch->addObj( Title::makeTitleSafe( NS_USER, $row->ar_user_text ) );
 729                                 $batch->addObj( Title::makeTitleSafe( NS_USER_TALK, $row->ar_user_text ) );
 730                         }
 731                         $batch->execute();
 732                         $revisions->seek( 0 );
 733                 }
 734                 if ( $haveFiles ) {
 735                         $batch = new LinkBatch();
 736                         foreach ( $files as $row ) {
 737                                 $batch->addObj( Title::makeTitleSafe( NS_USER, $row->fa_user_text ) );
 738                                 $batch->addObj( Title::makeTitleSafe( NS_USER_TALK, $row->fa_user_text ) );
 739                         }
 740                         $batch->execute();
 741                         $files->seek( 0 );
 742                 }
 743
 744                 if ( $this->mAllowed ) {
 745                         $out->enableOOUI();
 746
 747                         $action = $this->getPageTitle()->getLocalURL( [ 'action' => 'submit' ] );
 748                         # Start the form here
 749                         $form = new OOUI\FormLayout( [
 750                                 'method' => 'post',
 751                                 'action' => $action,
 752                                 'id' => 'undelete',
 753                         ] );
 754                 }
 755
 756                 # Show relevant lines from the deletion log:
 757                 $deleteLogPage = new LogPage( 'delete' );
 758                 $out->addHTML( Xml::element( 'h2', null, $deleteLogPage->getName()->text() ) . "\n" );
 759                 LogEventsList::showLogExtract( $out, 'delete', $this->mTargetObj );
 760                 # Show relevant lines from the suppression log:
 761                 $suppressLogPage = new LogPage( 'suppress' );
 762                 if ( $this->getUser()->isAllowed( 'suppressionlog' ) ) {
 763                         $out->addHTML( Xml::element( 'h2', null, $suppressLogPage->getName()->text() ) . "\n" );
 764                         LogEventsList::showLogExtract( $out, 'suppress', $this->mTargetObj );
 765                 }
 766
 767                 if ( $this->mAllowed && ( $haveRevisions || $haveFiles ) ) {
 768                         $fields[] = new OOUI\Layout( [
 769                                 'content' => new OOUI\HtmlSnippet( $this->msg( 'undeleteextrahelp' )->parseAsBlock() )
 770                         ] );
 771
 772                         $fields[] = new OOUI\FieldLayout(
 773                                 new OOUI\TextInputWidget( [
 774                                         'name' => 'wpComment',
 775                                         'inputId' => 'wpComment',
 776                                         'infusable' => true,
 777                                         'value' => $this->mComment,
 778                                         'autofocus' => true,
 779                                         // HTML maxlength uses "UTF-16 code units", which means that characters outside BMP
 780                                         // (e.g. emojis) count for two each. This limit is overridden in JS to instead count
 781                                         // Unicode codepoints.
 782                                         'maxLength' => CommentStore::COMMENT_CHARACTER_LIMIT,
 783                                 ] ),
 784                                 [
 785                                         'label' => $this->msg( 'undeletecomment' )->text(),
 786                                         'align' => 'top',
 787                                 ]
 788                         );
 789
 790                         $fields[] = new OOUI\FieldLayout(
 791                                 new OOUI\Widget( [
 792                                         'content' => new OOUI\HorizontalLayout( [
 793                                                 'items' => [
 794                                                         new OOUI\ButtonInputWidget( [
 795                                                                 'name' => 'restore',
 796                                                                 'inputId' => 'mw-undelete-submit',
 797                                                                 'value' => '1',
 798                                                                 'label' => $this->msg( 'undeletebtn' )->text(),
 799                                                                 'flags' => [ 'primary', 'progressive' ],
 800                                                                 'type' => 'submit',
 801                                                         ] ),
 802                                                         new OOUI\ButtonInputWidget( [
 803                                                                 'name' => 'invert',
 804                                                                 'inputId' => 'mw-undelete-invert',
 805                                                                 'value' => '1',
 806                                                                 'label' => $this->msg( 'undeleteinvert' )->text()
 807                                                         ] ),
 808                                                 ]
 809                                         ] )
 810                                 ] )
 811                         );
 812
 813                         if ( $this->getUser()->isAllowed( 'suppressrevision' ) ) {
 814                                 $fields[] = new OOUI\FieldLayout(
 815                                         new OOUI\CheckboxInputWidget( [
 816                                                 'name' => 'wpUnsuppress',
 817                                                 'inputId' => 'mw-undelete-unsuppress',
 818                                                 'value' => '1',
 819                                         ] ),
 820                                         [
 821                                                 'label' => $this->msg( 'revdelete-unsuppress' )->text(),
 822                                                 'align' => 'inline',
 823                                         ]
 824                                 );
 825                         }
 826
 827                         $fieldset = new OOUI\FieldsetLayout( [
 828                                 'label' => $this->msg( 'undelete-fieldset-title' )->text(),
 829                                 'id' => 'mw-undelete-table',
 830                                 'items' => $fields,
 831                         ] );
 832
 833                         $form->appendContent(
 834                                 new OOUI\PanelLayout( [
 835                                         'expanded' => false,
 836                                         'padded' => true,
 837                                         'framed' => true,
 838                                         'content' => $fieldset,
 839                                 ] ),
 840                                 new OOUI\HtmlSnippet(
 841                                         Html::hidden( 'target', $this->mTarget ) .
 842                                         Html::hidden( 'wpEditToken', $this->getUser()->getEditToken() )
 843                                 )
 844                         );
 845                 }
 846
 847                 $history = '';
 848                 $history .= Xml::element( 'h2', null, $this->msg( 'history' )->text() ) . "\n";
 849
 850                 if ( $haveRevisions ) {
 851                         # Show the page's stored (deleted) history
 852
 853                         if ( $this->getUser()->isAllowed( 'deleterevision' ) ) {
 854                                 $history .= Html::element(
 855                                         'button',
 856                                         [
 857                                                 'name' => 'revdel',
 858                                                 'type' => 'submit',
 859                                                 'class' => 'deleterevision-log-submit mw-log-deleterevision-button'
 860                                         ],
 861                                         $this->msg( 'showhideselectedversions' )->text()
 862                                 ) . "\n";
 863                         }
 864
 865                         $history .= '<ul class="mw-undelete-revlist">';
 866                         $remaining = $revisions->numRows();
 867                         $earliestLiveTime = $this->mTargetObj->getEarliestRevTime();
 868
 869                         foreach ( $revisions as $row ) {
 870                                 $remaining--;
 871                                 $history .= $this->formatRevisionRow( $row, $earliestLiveTime, $remaining );
 872                         }
 873                         $revisions->free();
 874                         $history .= '</ul>';
 875                 } else {
 876                         $out->addWikiMsg( 'nohistory' );
 877                 }
 878
 879                 if ( $haveFiles ) {
 880                         $history .= Xml::element( 'h2', null, $this->msg( 'filehist' )->text() ) . "\n";
 881                         $history .= '<ul class="mw-undelete-revlist">';
 882                         foreach ( $files as $row ) {
 883                                 $history .= $this->formatFileRow( $row );
 884                         }
 885                         $files->free();
 886                         $history .= '</ul>';
 887                 }
 888
 889                 if ( $this->mAllowed ) {
 890                         # Slip in the hidden controls here
 891                         $misc = Html::hidden( 'target', $this->mTarget );
 892                         $misc .= Html::hidden( 'wpEditToken', $this->getUser()->getEditToken() );
 893                         $history .= $misc;
 894
 895                         $form->appendContent( new OOUI\HtmlSnippet( $history ) );
 896                         $out->addHTML( $form );
 897                 } else {
 898                         $out->addHTML( $history );
 899                 }
 900
 901                 return true;
 902         }
 903
 904         protected function formatRevisionRow( $row, $earliestLiveTime, $remaining ) {
 905                 $rev = Revision::newFromArchiveRow( $row,
 906                         [
 907                                 'title' => $this->mTargetObj
 908                         ] );
 909
 910                 $revTextSize = '';
 911                 $ts = wfTimestamp( TS_MW, $row->ar_timestamp );
 912                 // Build checkboxen...
 913                 if ( $this->mAllowed ) {
 914                         if ( $this->mInvert ) {
 915                                 if ( in_array( $ts, $this->mTargetTimestamp ) ) {
 916                                         $checkBox = Xml::check( "ts$ts" );
 917                                 } else {
 918                                         $checkBox = Xml::check( "ts$ts", true );
 919                                 }
 920                         } else {
 921                                 $checkBox = Xml::check( "ts$ts" );
 922                         }
 923                 } else {
 924                         $checkBox = '';
 925                 }
 926
 927                 // Build page & diff links...
 928                 $user = $this->getUser();
 929                 if ( $this->mCanView ) {
 930                         $titleObj = $this->getPageTitle();
 931                         # Last link
 932                         if ( !$rev->userCan( Revision::DELETED_TEXT, $this->getUser() ) ) {
 933                                 $pageLink = htmlspecialchars( $this->getLanguage()->userTimeAndDate( $ts, $user ) );
 934                                 $last = $this->msg( 'diff' )->escaped();
 935                         } elseif ( $remaining > 0 || ( $earliestLiveTime && $ts > $earliestLiveTime ) ) {
 936                                 $pageLink = $this->getPageLink( $rev, $titleObj, $ts );
 937                                 $last = $this->getLinkRenderer()->makeKnownLink(
 938                                         $titleObj,
 939                                         $this->msg( 'diff' )->text(),
 940                                         [],
 941                                         [
 942                                                 'target' => $this->mTargetObj->getPrefixedText(),
 943                                                 'timestamp' => $ts,
 944                                                 'diff' => 'prev'
 945                                         ]
 946                                 );
 947                         } else {
 948                                 $pageLink = $this->getPageLink( $rev, $titleObj, $ts );
 949                                 $last = $this->msg( 'diff' )->escaped();
 950                         }
 951                 } else {
 952                         $pageLink = htmlspecialchars( $this->getLanguage()->userTimeAndDate( $ts, $user ) );
 953                         $last = $this->msg( 'diff' )->escaped();
 954                 }
 955
 956                 // User links
 957                 $userLink = Linker::revUserTools( $rev );
 958
 959                 // Minor edit
 960                 $minor = $rev->isMinor() ? ChangesList::flag( 'minor' ) : '';
 961
 962                 // Revision text size
 963                 $size = $row->ar_len;
 964                 if ( !is_null( $size ) ) {
 965                         $revTextSize = Linker::formatRevisionSize( $size );
 966                 }
 967
 968                 // Edit summary
 969                 $comment = Linker::revComment( $rev );
 970
 971                 // Tags
 972                 $attribs = [];
 973                 list( $tagSummary, $classes ) = ChangeTags::formatSummaryRow(
 974                         $row->ts_tags,
 975                         'deletedhistory',
 976                         $this->getContext()
 977                 );
 978                 if ( $classes ) {
 979                         $attribs['class'] = implode( ' ', $classes );
 980                 }
 981
 982                 $revisionRow = $this->msg( 'undelete-revision-row2' )
 983                         ->rawParams(
 984                                 $checkBox,
 985                                 $last,
 986                                 $pageLink,
 987                                 $userLink,
 988                                 $minor,
 989                                 $revTextSize,
 990                                 $comment,
 991                                 $tagSummary
 992                         )
 993                         ->escaped();
 994
 995                 return Xml::tags( 'li', $attribs, $revisionRow ) . "\n";
 996         }
 997
 998         private function formatFileRow( $row ) {
 999                 $file = ArchivedFile::newFromRow( $row );
1000                 $ts = wfTimestamp( TS_MW, $row->fa_timestamp );
1001                 $user = $this->getUser();
1002
1003                 $checkBox = '';
1004                 if ( $this->mCanView && $row->fa_storage_key ) {
1005                         if ( $this->mAllowed ) {
1006                                 $checkBox = Xml::check( 'fileid' . $row->fa_id );
1007                         }
1008                         $key = urlencode( $row->fa_storage_key );
1009                         $pageLink = $this->getFileLink( $file, $this->getPageTitle(), $ts, $key );
1010                 } else {
1011                         $pageLink = htmlspecialchars( $this->getLanguage()->userTimeAndDate( $ts, $user ) );
1012                 }
1013                 $userLink = $this->getFileUser( $file );
1014                 $data = $this->msg( 'widthheight' )->numParams( $row->fa_width, $row->fa_height )->text();
1015                 $bytes = $this->msg( 'parentheses' )
1016                         ->plaintextParams( $this->msg( 'nbytes' )->numParams( $row->fa_size )->text() )
1017                         ->plain();
1018                 $data = htmlspecialchars( $data . ' ' . $bytes );
1019                 $comment = $this->getFileComment( $file );
1020
1021                 // Add show/hide deletion links if available
1022                 $canHide = $this->isAllowed( 'deleterevision' );
1023                 if ( $canHide || ( $file->getVisibility() && $this->isAllowed( 'deletedhistory' ) ) ) {
1024                         if ( !$file->userCan( File::DELETED_RESTRICTED, $user ) ) {
1025                                 // Revision was hidden from sysops
1026                                 $revdlink = Linker::revDeleteLinkDisabled( $canHide );
1027                         } else {
1028                                 $query = [
1029                                         'type' => 'filearchive',
1030                                         'target' => $this->mTargetObj->getPrefixedDBkey(),
1031                                         'ids' => $row->fa_id
1032                                 ];
1033                                 $revdlink = Linker::revDeleteLink( $query,
1034                                         $file->isDeleted( File::DELETED_RESTRICTED ), $canHide );
1035                         }
1036                 } else {
1037                         $revdlink = '';
1038                 }
1039
1040                 return "<li>$checkBox $revdlink $pageLink . . $userLink $data $comment</li>\n";
1041         }
1042
1043         /**
1044          * Fetch revision text link if it's available to all users
1045          *
1046          * @param Revision $rev
1047          * @param Title $titleObj
1048          * @param string $ts Timestamp
1049          * @return string
1050          */
1051         function getPageLink( $rev, $titleObj, $ts ) {
1052                 $user = $this->getUser();
1053                 $time = $this->getLanguage()->userTimeAndDate( $ts, $user );
1054
1055                 if ( !$rev->userCan( Revision::DELETED_TEXT, $user ) ) {
1056                         return '<span class="history-deleted">' . $time . '</span>';
1057                 }
1058
1059                 $link = $this->getLinkRenderer()->makeKnownLink(
1060                         $titleObj,
1061                         $time,
1062                         [],
1063                         [
1064                                 'target' => $this->mTargetObj->getPrefixedText(),
1065                                 'timestamp' => $ts
1066                         ]
1067                 );
1068
1069                 if ( $rev->isDeleted( Revision::DELETED_TEXT ) ) {
1070                         $link = '<span class="history-deleted">' . $link . '</span>';
1071                 }
1072
1073                 return $link;
1074         }
1075
1076         /**
1077          * Fetch image view link if it's available to all users
1078          *
1079          * @param File|ArchivedFile $file
1080          * @param Title $titleObj
1081          * @param string $ts A timestamp
1082          * @param string $key A storage key
1083          *
1084          * @return string HTML fragment
1085          */
1086         function getFileLink( $file, $titleObj, $ts, $key ) {
1087                 $user = $this->getUser();
1088                 $time = $this->getLanguage()->userTimeAndDate( $ts, $user );
1089
1090                 if ( !$file->userCan( File::DELETED_FILE, $user ) ) {
1091                         return '<span class="history-deleted">' . htmlspecialchars( $time ) . '</span>';
1092                 }
1093
1094                 $link = $this->getLinkRenderer()->makeKnownLink(
1095                         $titleObj,
1096                         $time,
1097                         [],
1098                         [
1099                                 'target' => $this->mTargetObj->getPrefixedText(),
1100                                 'file' => $key,
1101                                 'token' => $user->getEditToken( $key )
1102                         ]
1103                 );
1104
1105                 if ( $file->isDeleted( File::DELETED_FILE ) ) {
1106                         $link = '<span class="history-deleted">' . $link . '</span>';
1107                 }
1108
1109                 return $link;
1110         }
1111
1112         /**
1113          * Fetch file's user id if it's available to this user
1114          *
1115          * @param File|ArchivedFile $file
1116          * @return string HTML fragment
1117          */
1118         function getFileUser( $file ) {
1119                 if ( !$file->userCan( File::DELETED_USER, $this->getUser() ) ) {
1120                         return '<span class="history-deleted">' .
1121                                 $this->msg( 'rev-deleted-user' )->escaped() .
1122                                 '</span>';
1123                 }
1124
1125                 $link = Linker::userLink( $file->getRawUser(), $file->getRawUserText() ) .
1126                         Linker::userToolLinks( $file->getRawUser(), $file->getRawUserText() );
1127
1128                 if ( $file->isDeleted( File::DELETED_USER ) ) {
1129                         $link = '<span class="history-deleted">' . $link . '</span>';
1130                 }
1131
1132                 return $link;
1133         }
1134
1135         /**
1136          * Fetch file upload comment if it's available to this user
1137          *
1138          * @param File|ArchivedFile $file
1139          * @return string HTML fragment
1140          */
1141         function getFileComment( $file ) {
1142                 if ( !$file->userCan( File::DELETED_COMMENT, $this->getUser() ) ) {
1143                         return '<span class="history-deleted"><span class="comment">' .
1144                                 $this->msg( 'rev-deleted-comment' )->escaped() . '</span></span>';
1145                 }
1146
1147                 $link = Linker::commentBlock( $file->getRawDescription() );
1148
1149                 if ( $file->isDeleted( File::DELETED_COMMENT ) ) {
1150                         $link = '<span class="history-deleted">' . $link . '</span>';
1151                 }
1152
1153                 return $link;
1154         }
1155
1156         function undelete() {
1157                 if ( $this->getConfig()->get( 'UploadMaintenance' )
1158                         && $this->mTargetObj->getNamespace() == NS_FILE
1159                 ) {
1160                         throw new ErrorPageError( 'undelete-error', 'filedelete-maintenance' );
1161                 }
1162
1163                 $this->checkReadOnly();
1164
1165                 $out = $this->getOutput();
1166                 $archive = new PageArchive( $this->mTargetObj, $this->getConfig() );
1167                 Hooks::run( 'UndeleteForm::undelete', [ &$archive, $this->mTargetObj ] );
1168                 $ok = $archive->undelete(
1169                         $this->mTargetTimestamp,
1170                         $this->mComment,
1171                         $this->mFileVersions,
1172                         $this->mUnsuppress,
1173                         $this->getUser()
1174                 );
1175
1176                 if ( is_array( $ok ) ) {
1177                         if ( $ok[1] ) { // Undeleted file count
1178                                 Hooks::run( 'FileUndeleteComplete', [
1179                                         $this->mTargetObj, $this->mFileVersions,
1180                                         $this->getUser(), $this->mComment ] );
1181                         }
1182
1183                         $link = $this->getLinkRenderer()->makeKnownLink( $this->mTargetObj );
1184                         $out->addWikiMsg( 'undeletedpage', Message::rawParam( $link ) );
1185                 } else {
1186                         $out->setPageTitle( $this->msg( 'undelete-error' ) );
1187                 }
1188
1189                 // Show revision undeletion warnings and errors
1190                 $status = $archive->getRevisionStatus();
1191                 if ( $status && !$status->isGood() ) {
1192                         $out->wrapWikiTextAsInterface(
1193                                 'error',
1194                                 '<div id="mw-error-cannotundelete">' .
1195                                 $status->getWikiText(
1196                                         'cannotundelete',
1197                                         'cannotundelete'
1198                                 ) . '</div>'
1199                         );
1200                 }
1201
1202                 // Show file undeletion warnings and errors
1203                 $status = $archive->getFileStatus();
1204                 if ( $status && !$status->isGood() ) {
1205                         $out->wrapWikiTextAsInterface(
1206                                 'error',
1207                                 $status->getWikiText(
1208                                         'undelete-error-short',
1209                                         'undelete-error-long'
1210                                 )
1211                         );
1212                 }
1213         }
1214
1215         /**
1216          * Return an array of subpages beginning with $search that this special page will accept.
1217          *
1218          * @param string $search Prefix to search for
1219          * @param int $limit Maximum number of results to return (usually 10)
1220          * @param int $offset Number of results to skip (usually 0)
1221          * @return string[] Matching subpages
1222          */
1223         public function prefixSearchSubpages( $search, $limit, $offset ) {
1224                 return $this->prefixSearchString( $search, $limit, $offset );
1225         }
1226
1227         protected function getGroupName() {
1228                 return 'pagetools';
1229         }
1230 }