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                 $permissionManager = MediaWikiServices::getInstance()->getPermissionManager();
 142
 143                 if ( $this->mTargetObj !== null ) {
 144                         return $permissionManager->userCan( $permission, $user, $this->mTargetObj );
 145                 } else {
 146                         return $user->isAllowed( $permission );
 147                 }
 148         }
 149
 150         function userCanExecute( User $user ) {
 151                 return $this->isAllowed( $this->mRestriction, $user );
 152         }
 153
 154         function execute( $par ) {
 155                 $this->useTransactionalTimeLimit();
 156
 157                 $user = $this->getUser();
 158
 159                 $this->setHeaders();
 160                 $this->outputHeader();
 161
 162                 $this->loadRequest( $par );
 163                 $this->checkPermissions(); // Needs to be after mTargetObj is set
 164
 165                 $out = $this->getOutput();
 166
 167                 if ( is_null( $this->mTargetObj ) ) {
 168                         $out->addWikiMsg( 'undelete-header' );
 169
 170                         # Not all users can just browse every deleted page from the list
 171                         if ( $user->isAllowed( 'browsearchive' ) ) {
 172                                 $this->showSearchForm();
 173                         }
 174
 175                         return;
 176                 }
 177
 178                 $this->addHelpLink( 'Help:Undelete' );
 179                 if ( $this->mAllowed ) {
 180                         $out->setPageTitle( $this->msg( 'undeletepage' ) );
 181                 } else {
 182                         $out->setPageTitle( $this->msg( 'viewdeletedpage' ) );
 183                 }
 184
 185                 $this->getSkin()->setRelevantTitle( $this->mTargetObj );
 186
 187                 if ( $this->mTimestamp !== '' ) {
 188                         $this->showRevision( $this->mTimestamp );
 189                 } elseif ( $this->mFilename !== null && $this->mTargetObj->inNamespace( NS_FILE ) ) {
 190                         $file = new ArchivedFile( $this->mTargetObj, 0, $this->mFilename );
 191                         // Check if user is allowed to see this file
 192                         if ( !$file->exists() ) {
 193                                 $out->addWikiMsg( 'filedelete-nofile', $this->mFilename );
 194                         } elseif ( !$file->userCan( File::DELETED_FILE, $user ) ) {
 195                                 if ( $file->isDeleted( File::DELETED_RESTRICTED ) ) {
 196                                         throw new PermissionsError( 'suppressrevision' );
 197                                 } else {
 198                                         throw new PermissionsError( 'deletedtext' );
 199                                 }
 200                         } elseif ( !$user->matchEditToken( $this->mToken, $this->mFilename ) ) {
 201                                 $this->showFileConfirmationForm( $this->mFilename );
 202                         } else {
 203                                 $this->showFile( $this->mFilename );
 204                         }
 205                 } elseif ( $this->mAction === 'submit' ) {
 206                         if ( $this->mRestore ) {
 207                                 $this->undelete();
 208                         } elseif ( $this->mRevdel ) {
 209                                 $this->redirectToRevDel();
 210                         }
 211
 212                 } else {
 213                         $this->showHistory();
 214                 }
 215         }
 216
 217         /**
 218          * Convert submitted form data to format expected by RevisionDelete and
 219          * redirect the request
 220          */
 221         private function redirectToRevDel() {
 222                 $archive = new PageArchive( $this->mTargetObj );
 223
 224                 $revisions = [];
 225
 226                 foreach ( $this->getRequest()->getValues() as $key => $val ) {
 227                         $matches = [];
 228                         if ( preg_match( "/^ts(\d{14})$/", $key, $matches ) ) {
 229                                 $revisions[$archive->getRevision( $matches[1] )->getId()] = 1;
 230                         }
 231                 }
 232
 233                 $query = [
 234                         'type' => 'revision',
 235                         'ids' => $revisions,
 236                         'target' => $this->mTargetObj->getPrefixedText()
 237                 ];
 238                 $url = SpecialPage::getTitleFor( 'Revisiondelete' )->getFullURL( $query );
 239                 $this->getOutput()->redirect( $url );
 240         }
 241
 242         function showSearchForm() {
 243                 $out = $this->getOutput();
 244                 $out->setPageTitle( $this->msg( 'undelete-search-title' ) );
 245                 $fuzzySearch = $this->getRequest()->getVal( 'fuzzy', true );
 246
 247                 $out->enableOOUI();
 248
 249                 $fields[] = new OOUI\ActionFieldLayout(
 250                         new OOUI\TextInputWidget( [
 251                                 'name' => 'prefix',
 252                                 'inputId' => 'prefix',
 253                                 'infusable' => true,
 254                                 'value' => $this->mSearchPrefix,
 255                                 'autofocus' => true,
 256                         ] ),
 257                         new OOUI\ButtonInputWidget( [
 258                                 'label' => $this->msg( 'undelete-search-submit' )->text(),
 259                                 'flags' => [ 'primary', 'progressive' ],
 260                                 'inputId' => 'searchUndelete',
 261                                 'type' => 'submit',
 262                         ] ),
 263                         [
 264                                 'label' => new OOUI\HtmlSnippet(
 265                                         $this->msg(
 266                                                 $fuzzySearch ? 'undelete-search-full' : 'undelete-search-prefix'
 267                                         )->parse()
 268                                 ),
 269                                 'align' => 'left',
 270                         ]
 271                 );
 272
 273                 $fieldset = new OOUI\FieldsetLayout( [
 274                         'label' => $this->msg( 'undelete-search-box' )->text(),
 275                         'items' => $fields,
 276                 ] );
 277
 278                 $form = new OOUI\FormLayout( [
 279                         'method' => 'get',
 280                         'action' => wfScript(),
 281                 ] );
 282
 283                 $form->appendContent(
 284                         $fieldset,
 285                         new OOUI\HtmlSnippet(
 286                                 Html::hidden( 'title', $this->getPageTitle()->getPrefixedDBkey() ) .
 287                                 Html::hidden( 'fuzzy', $fuzzySearch )
 288                         )
 289                 );
 290
 291                 $out->addHTML(
 292                         new OOUI\PanelLayout( [
 293                                 'expanded' => false,
 294                                 'padded' => true,
 295                                 'framed' => true,
 296                                 'content' => $form,
 297                         ] )
 298                 );
 299
 300                 # List undeletable articles
 301                 if ( $this->mSearchPrefix ) {
 302                         // For now, we enable search engine match only when specifically asked to
 303                         // by using fuzzy=1 parameter.
 304                         if ( $fuzzySearch ) {
 305                                 $result = PageArchive::listPagesBySearch( $this->mSearchPrefix );
 306                         } else {
 307                                 $result = PageArchive::listPagesByPrefix( $this->mSearchPrefix );
 308                         }
 309                         $this->showList( $result );
 310                 }
 311         }
 312
 313         /**
 314          * Generic list of deleted pages
 315          *
 316          * @param IResultWrapper $result
 317          * @return bool
 318          */
 319         private function showList( $result ) {
 320                 $out = $this->getOutput();
 321
 322                 if ( $result->numRows() == 0 ) {
 323                         $out->addWikiMsg( 'undelete-no-results' );
 324
 325                         return false;
 326                 }
 327
 328                 $out->addWikiMsg( 'undeletepagetext', $this->getLanguage()->formatNum( $result->numRows() ) );
 329
 330                 $linkRenderer = $this->getLinkRenderer();
 331                 $undelete = $this->getPageTitle();
 332                 $out->addHTML( "<ul id='undeleteResultsList'>\n" );
 333                 foreach ( $result as $row ) {
 334                         $title = Title::makeTitleSafe( $row->ar_namespace, $row->ar_title );
 335                         if ( $title !== null ) {
 336                                 $item = $linkRenderer->makeKnownLink(
 337                                         $undelete,
 338                                         $title->getPrefixedText(),
 339                                         [],
 340                                         [ 'target' => $title->getPrefixedText() ]
 341                                 );
 342                         } else {
 343                                 // The title is no longer valid, show as text
 344                                 $item = Html::element(
 345                                         'span',
 346                                         [ 'class' => 'mw-invalidtitle' ],
 347                                         Linker::getInvalidTitleDescription(
 348                                                 $this->getContext(),
 349                                                 $row->ar_namespace,
 350                                                 $row->ar_title
 351                                         )
 352                                 );
 353                         }
 354                         $revs = $this->msg( 'undeleterevisions' )->numParams( $row->count )->parse();
 355                         $out->addHTML(
 356                                 Html::rawElement(
 357                                         'li',
 358                                         [ 'class' => 'undeleteResult' ],
 359                                         "{$item} ({$revs})"
 360                                 )
 361                         );
 362                 }
 363                 $result->free();
 364                 $out->addHTML( "</ul>\n" );
 365
 366                 return true;
 367         }
 368
 369         private function showRevision( $timestamp ) {
 370                 if ( !preg_match( '/[0-9]{14}/', $timestamp ) ) {
 371                         return;
 372                 }
 373
 374                 $archive = new PageArchive( $this->mTargetObj, $this->getConfig() );
 375                 if ( !Hooks::run( 'UndeleteForm::showRevision', [ &$archive, $this->mTargetObj ] ) ) {
 376                         return;
 377                 }
 378                 $rev = $archive->getRevision( $timestamp );
 379
 380                 $out = $this->getOutput();
 381                 $user = $this->getUser();
 382
 383                 if ( !$rev ) {
 384                         $out->addWikiMsg( 'undeleterevision-missing' );
 385
 386                         return;
 387                 }
 388
 389                 if ( $rev->isDeleted( Revision::DELETED_TEXT ) ) {
 390                         if ( !$rev->userCan( Revision::DELETED_TEXT, $user ) ) {
 391                                 $out->wrapWikiMsg(
 392                                         "<div class='mw-warning plainlinks'>\n$1\n</div>\n",
 393                                 $rev->isDeleted( Revision::DELETED_RESTRICTED ) ?
 394                                         'rev-suppressed-text-permission' : 'rev-deleted-text-permission'
 395                                 );
 396
 397                                 return;
 398                         }
 399
 400                         $out->wrapWikiMsg(
 401                                 "<div class='mw-warning plainlinks'>\n$1\n</div>\n",
 402                                 $rev->isDeleted( Revision::DELETED_RESTRICTED ) ?
 403                                         'rev-suppressed-text-view' : 'rev-deleted-text-view'
 404                         );
 405                         $out->addHTML( '<br />' );
 406                         // and we are allowed to see...
 407                 }
 408
 409                 if ( $this->mDiff ) {
 410                         $previousRev = $archive->getPreviousRevision( $timestamp );
 411                         if ( $previousRev ) {
 412                                 $this->showDiff( $previousRev, $rev );
 413                                 if ( $this->mDiffOnly ) {
 414                                         return;
 415                                 }
 416
 417                                 $out->addHTML( '<hr />' );
 418                         } else {
 419                                 $out->addWikiMsg( 'undelete-nodiff' );
 420                         }
 421                 }
 422
 423                 $link = $this->getLinkRenderer()->makeKnownLink(
 424                         $this->getPageTitle( $this->mTargetObj->getPrefixedDBkey() ),
 425                         $this->mTargetObj->getPrefixedText()
 426                 );
 427
 428                 $lang = $this->getLanguage();
 429
 430                 // date and time are separate parameters to facilitate localisation.
 431                 // $time is kept for backward compat reasons.
 432                 $time = $lang->userTimeAndDate( $timestamp, $user );
 433                 $d = $lang->userDate( $timestamp, $user );
 434                 $t = $lang->userTime( $timestamp, $user );
 435                 $userLink = Linker::revUserTools( $rev );
 436
 437                 $content = $rev->getContent( RevisionRecord::FOR_THIS_USER, $user );
 438
 439                 // TODO: MCR: this will have to become something like $hasTextSlots and $hasNonTextSlots
 440                 $isText = ( $content instanceof TextContent );
 441
 442                 if ( $this->mPreview || $isText ) {
 443                         $openDiv = '<div id="mw-undelete-revision" class="mw-warning">';
 444                 } else {
 445                         $openDiv = '<div id="mw-undelete-revision">';
 446                 }
 447                 $out->addHTML( $openDiv );
 448
 449                 // Revision delete links
 450                 if ( !$this->mDiff ) {
 451                         $revdel = Linker::getRevDeleteLink( $user, $rev, $this->mTargetObj );
 452                         if ( $revdel ) {
 453                                 $out->addHTML( "$revdel " );
 454                         }
 455                 }
 456
 457                 $out->addWikiMsg(
 458                         'undelete-revision',
 459                         Message::rawParam( $link ), $time,
 460                         Message::rawParam( $userLink ), $d, $t
 461                 );
 462                 $out->addHTML( '</div>' );
 463
 464                 if ( !Hooks::run( 'UndeleteShowRevision', [ $this->mTargetObj, $rev ] ) ) {
 465                         return;
 466                 }
 467
 468                 if ( $this->mPreview || !$isText ) {
 469                         // NOTE: non-text content has no source view, so always use rendered preview
 470
 471                         $popts = $out->parserOptions();
 472                         $renderer = MediaWikiServices::getInstance()->getRevisionRenderer();
 473
 474                         $rendered = $renderer->getRenderedRevision(
 475                                 $rev->getRevisionRecord(),
 476                                 $popts,
 477                                 $user,
 478                                 [ 'audience' => RevisionRecord::FOR_THIS_USER ]
 479                         );
 480
 481                         // Fail hard if the audience check fails, since we already checked
 482                         // at the beginning of this method.
 483                         $pout = $rendered->getRevisionParserOutput();
 484
 485                         $out->addParserOutput( $pout, [
 486                                 'enableSectionEditLinks' => false,
 487                         ] );
 488                 }
 489
 490                 $out->enableOOUI();
 491                 $buttonFields = [];
 492
 493                 if ( $isText ) {
 494                         // TODO: MCR: make this work for multiple slots
 495                         // source view for textual content
 496                         $sourceView = Xml::element( 'textarea', [
 497                                 'readonly' => 'readonly',
 498                                 'cols' => 80,
 499                                 'rows' => 25
 500                         ], $content->getText() . "\n" );
 501
 502                         $buttonFields[] = new OOUI\ButtonInputWidget( [
 503                                 'type' => 'submit',
 504                                 'name' => 'preview',
 505                                 'label' => $this->msg( 'showpreview' )->text()
 506                         ] );
 507                 } else {
 508                         $sourceView = '';
 509                 }
 510
 511                 $buttonFields[] = new OOUI\ButtonInputWidget( [
 512                         'name' => 'diff',
 513                         'type' => 'submit',
 514                         'label' => $this->msg( 'showdiff' )->text()
 515                 ] );
 516
 517                 $out->addHTML(
 518                         $sourceView .
 519                                 Xml::openElement( 'div', [
 520                                         'style' => 'clear: both' ] ) .
 521                                 Xml::openElement( 'form', [
 522                                         'method' => 'post',
 523                                         'action' => $this->getPageTitle()->getLocalURL( [ 'action' => 'submit' ] ) ] ) .
 524                                 Xml::element( 'input', [
 525                                         'type' => 'hidden',
 526                                         'name' => 'target',
 527                                         'value' => $this->mTargetObj->getPrefixedDBkey() ] ) .
 528                                 Xml::element( 'input', [
 529                                         'type' => 'hidden',
 530                                         'name' => 'timestamp',
 531                                         'value' => $timestamp ] ) .
 532                                 Xml::element( 'input', [
 533                                         'type' => 'hidden',
 534                                         'name' => 'wpEditToken',
 535                                         'value' => $user->getEditToken() ] ) .
 536                                 new OOUI\FieldLayout(
 537                                         new OOUI\Widget( [
 538                                                 'content' => new OOUI\HorizontalLayout( [
 539                                                         'items' => $buttonFields
 540                                                 ] )
 541                                         ] )
 542                                 ) .
 543                                 Xml::closeElement( 'form' ) .
 544                                 Xml::closeElement( 'div' )
 545                 );
 546         }
 547
 548         /**
 549          * Build a diff display between this and the previous either deleted
 550          * or non-deleted edit.
 551          *
 552          * @param Revision $previousRev
 553          * @param Revision $currentRev
 554          */
 555         function showDiff( $previousRev, $currentRev ) {
 556                 $diffContext = clone $this->getContext();
 557                 $diffContext->setTitle( $currentRev->getTitle() );
 558                 $diffContext->setWikiPage( WikiPage::factory( $currentRev->getTitle() ) );
 559
 560                 $diffEngine = $currentRev->getContentHandler()->createDifferenceEngine( $diffContext );
 561                 $diffEngine->setRevisions( $previousRev->getRevisionRecord(), $currentRev->getRevisionRecord() );
 562                 $diffEngine->showDiffStyle();
 563                 $formattedDiff = $diffEngine->getDiff(
 564                         $this->diffHeader( $previousRev, 'o' ),
 565                         $this->diffHeader( $currentRev, 'n' )
 566                 );
 567
 568                 $this->getOutput()->addHTML( "<div>$formattedDiff</div>\n" );
 569         }
 570
 571         /**
 572          * @param Revision $rev
 573          * @param string $prefix
 574          * @return string
 575          */
 576         private function diffHeader( $rev, $prefix ) {
 577                 $isDeleted = !( $rev->getId() && $rev->getTitle() );
 578                 if ( $isDeleted ) {
 579                         /// @todo FIXME: $rev->getTitle() is null for deleted revs...?
 580                         $targetPage = $this->getPageTitle();
 581                         $targetQuery = [
 582                                 'target' => $this->mTargetObj->getPrefixedText(),
 583                                 'timestamp' => wfTimestamp( TS_MW, $rev->getTimestamp() )
 584                         ];
 585                 } else {
 586                         /// @todo FIXME: getId() may return non-zero for deleted revs...
 587                         $targetPage = $rev->getTitle();
 588                         $targetQuery = [ 'oldid' => $rev->getId() ];
 589                 }
 590
 591                 // Add show/hide deletion links if available
 592                 $user = $this->getUser();
 593                 $lang = $this->getLanguage();
 594                 $rdel = Linker::getRevDeleteLink( $user, $rev, $this->mTargetObj );
 595
 596                 if ( $rdel ) {
 597                         $rdel = " $rdel";
 598                 }
 599
 600                 $minor = $rev->isMinor() ? ChangesList::flag( 'minor' ) : '';
 601
 602                 $tagIds = wfGetDB( DB_REPLICA )->selectFieldValues(
 603                         'change_tag',
 604                         'ct_tag_id',
 605                         [ 'ct_rev_id' => $rev->getId() ],
 606                         __METHOD__
 607                 );
 608                 $tags = [];
 609                 $changeTagDefStore = MediaWikiServices::getInstance()->getChangeTagDefStore();
 610                 foreach ( $tagIds as $tagId ) {
 611                         try {
 612                                 $tags[] = $changeTagDefStore->getName( (int)$tagId );
 613                         } catch ( NameTableAccessException $exception ) {
 614                                 continue;
 615                         }
 616                 }
 617                 $tags = implode( ',', $tags );
 618                 $tagSummary = ChangeTags::formatSummaryRow( $tags, 'deleteddiff', $this->getContext() );
 619
 620                 // FIXME This is reimplementing DifferenceEngine#getRevisionHeader
 621                 // and partially #showDiffPage, but worse
 622                 return '<div id="mw-diff-' . $prefix . 'title1"><strong>' .
 623                         $this->getLinkRenderer()->makeLink(
 624                                 $targetPage,
 625                                 $this->msg(
 626                                         'revisionasof',
 627                                         $lang->userTimeAndDate( $rev->getTimestamp(), $user ),
 628                                         $lang->userDate( $rev->getTimestamp(), $user ),
 629                                         $lang->userTime( $rev->getTimestamp(), $user )
 630                                 )->text(),
 631                                 [],
 632                                 $targetQuery
 633                         ) .
 634                         '</strong></div>' .
 635                         '<div id="mw-diff-' . $prefix . 'title2">' .
 636                         Linker::revUserTools( $rev ) . '<br />' .
 637                         '</div>' .
 638                         '<div id="mw-diff-' . $prefix . 'title3">' .
 639                         $minor . Linker::revComment( $rev ) . $rdel . '<br />' .
 640                         '</div>' .
 641                         '<div id="mw-diff-' . $prefix . 'title5">' .
 642                         $tagSummary[0] . '<br />' .
 643                         '</div>';
 644         }
 645
 646         /**
 647          * Show a form confirming whether a tokenless user really wants to see a file
 648          * @param string $key
 649          */
 650         private function showFileConfirmationForm( $key ) {
 651                 $out = $this->getOutput();
 652                 $lang = $this->getLanguage();
 653                 $user = $this->getUser();
 654                 $file = new ArchivedFile( $this->mTargetObj, 0, $this->mFilename );
 655                 $out->addWikiMsg( 'undelete-show-file-confirm',
 656                         $this->mTargetObj->getText(),
 657                         $lang->userDate( $file->getTimestamp(), $user ),
 658                         $lang->userTime( $file->getTimestamp(), $user ) );
 659                 $out->addHTML(
 660                         Xml::openElement( 'form', [
 661                                         'method' => 'POST',
 662                                         'action' => $this->getPageTitle()->getLocalURL( [
 663                                                 'target' => $this->mTarget,
 664                                                 'file' => $key,
 665                                                 'token' => $user->getEditToken( $key ),
 666                                         ] ),
 667                                 ]
 668                         ) .
 669                                 Xml::submitButton( $this->msg( 'undelete-show-file-submit' )->text() ) .
 670                                 '</form>'
 671                 );
 672         }
 673
 674         /**
 675          * Show a deleted file version requested by the visitor.
 676          * @param string $key
 677          */
 678         private function showFile( $key ) {
 679                 $this->getOutput()->disable();
 680
 681                 # We mustn't allow the output to be CDN cached, otherwise
 682                 # if an admin previews a deleted image, and it's cached, then
 683                 # a user without appropriate permissions can toddle off and
 684                 # nab the image, and CDN will serve it
 685                 $response = $this->getRequest()->response();
 686                 $response->header( 'Expires: ' . gmdate( 'D, d M Y H:i:s', 0 ) . ' GMT' );
 687                 $response->header( 'Cache-Control: no-cache, no-store, max-age=0, must-revalidate' );
 688                 $response->header( 'Pragma: no-cache' );
 689
 690                 $repo = RepoGroup::singleton()->getLocalRepo();
 691                 $path = $repo->getZonePath( 'deleted' ) . '/' . $repo->getDeletedHashPath( $key ) . $key;
 692                 $repo->streamFileWithStatus( $path );
 693         }
 694
 695         protected function showHistory() {
 696                 $this->checkReadOnly();
 697
 698                 $out = $this->getOutput();
 699                 if ( $this->mAllowed ) {
 700                         $out->addModules( 'mediawiki.special.undelete' );
 701                 }
 702                 $out->wrapWikiMsg(
 703                         "<div class='mw-undelete-pagetitle'>\n$1\n</div>\n",
 704                         [ 'undeletepagetitle', wfEscapeWikiText( $this->mTargetObj->getPrefixedText() ) ]
 705                 );
 706
 707                 $archive = new PageArchive( $this->mTargetObj, $this->getConfig() );
 708                 Hooks::run( 'UndeleteForm::showHistory', [ &$archive, $this->mTargetObj ] );
 709
 710                 $out->addHTML( '<div class="mw-undelete-history">' );
 711                 if ( $this->mAllowed ) {
 712                         $out->addWikiMsg( 'undeletehistory' );
 713                         $out->addWikiMsg( 'undeleterevdel' );
 714                 } else {
 715                         $out->addWikiMsg( 'undeletehistorynoadmin' );
 716                 }
 717                 $out->addHTML( '</div>' );
 718
 719                 # List all stored revisions
 720                 $revisions = $archive->listRevisions();
 721                 $files = $archive->listFiles();
 722
 723                 $haveRevisions = $revisions && $revisions->numRows() > 0;
 724                 $haveFiles = $files && $files->numRows() > 0;
 725
 726                 # Batch existence check on user and talk pages
 727                 if ( $haveRevisions ) {
 728                         $batch = new LinkBatch();
 729                         foreach ( $revisions as $row ) {
 730                                 $batch->addObj( Title::makeTitleSafe( NS_USER, $row->ar_user_text ) );
 731                                 $batch->addObj( Title::makeTitleSafe( NS_USER_TALK, $row->ar_user_text ) );
 732                         }
 733                         $batch->execute();
 734                         $revisions->seek( 0 );
 735                 }
 736                 if ( $haveFiles ) {
 737                         $batch = new LinkBatch();
 738                         foreach ( $files as $row ) {
 739                                 $batch->addObj( Title::makeTitleSafe( NS_USER, $row->fa_user_text ) );
 740                                 $batch->addObj( Title::makeTitleSafe( NS_USER_TALK, $row->fa_user_text ) );
 741                         }
 742                         $batch->execute();
 743                         $files->seek( 0 );
 744                 }
 745
 746                 if ( $this->mAllowed ) {
 747                         $out->enableOOUI();
 748
 749                         $action = $this->getPageTitle()->getLocalURL( [ 'action' => 'submit' ] );
 750                         # Start the form here
 751                         $form = new OOUI\FormLayout( [
 752                                 'method' => 'post',
 753                                 'action' => $action,
 754                                 'id' => 'undelete',
 755                         ] );
 756                 }
 757
 758                 # Show relevant lines from the deletion log:
 759                 $deleteLogPage = new LogPage( 'delete' );
 760                 $out->addHTML( Xml::element( 'h2', null, $deleteLogPage->getName()->text() ) . "\n" );
 761                 LogEventsList::showLogExtract( $out, 'delete', $this->mTargetObj );
 762                 # Show relevant lines from the suppression log:
 763                 $suppressLogPage = new LogPage( 'suppress' );
 764                 if ( $this->getUser()->isAllowed( 'suppressionlog' ) ) {
 765                         $out->addHTML( Xml::element( 'h2', null, $suppressLogPage->getName()->text() ) . "\n" );
 766                         LogEventsList::showLogExtract( $out, 'suppress', $this->mTargetObj );
 767                 }
 768
 769                 if ( $this->mAllowed && ( $haveRevisions || $haveFiles ) ) {
 770                         $fields[] = new OOUI\Layout( [
 771                                 'content' => new OOUI\HtmlSnippet( $this->msg( 'undeleteextrahelp' )->parseAsBlock() )
 772                         ] );
 773
 774                         $fields[] = new OOUI\FieldLayout(
 775                                 new OOUI\TextInputWidget( [
 776                                         'name' => 'wpComment',
 777                                         'inputId' => 'wpComment',
 778                                         'infusable' => true,
 779                                         'value' => $this->mComment,
 780                                         'autofocus' => true,
 781                                         // HTML maxlength uses "UTF-16 code units", which means that characters outside BMP
 782                                         // (e.g. emojis) count for two each. This limit is overridden in JS to instead count
 783                                         // Unicode codepoints.
 784                                         'maxLength' => CommentStore::COMMENT_CHARACTER_LIMIT,
 785                                 ] ),
 786                                 [
 787                                         'label' => $this->msg( 'undeletecomment' )->text(),
 788                                         'align' => 'top',
 789                                 ]
 790                         );
 791
 792                         $fields[] = new OOUI\FieldLayout(
 793                                 new OOUI\Widget( [
 794                                         'content' => new OOUI\HorizontalLayout( [
 795                                                 'items' => [
 796                                                         new OOUI\ButtonInputWidget( [
 797                                                                 'name' => 'restore',
 798                                                                 'inputId' => 'mw-undelete-submit',
 799                                                                 'value' => '1',
 800                                                                 'label' => $this->msg( 'undeletebtn' )->text(),
 801                                                                 'flags' => [ 'primary', 'progressive' ],
 802                                                                 'type' => 'submit',
 803                                                         ] ),
 804                                                         new OOUI\ButtonInputWidget( [
 805                                                                 'name' => 'invert',
 806                                                                 'inputId' => 'mw-undelete-invert',
 807                                                                 'value' => '1',
 808                                                                 'label' => $this->msg( 'undeleteinvert' )->text()
 809                                                         ] ),
 810                                                 ]
 811                                         ] )
 812                                 ] )
 813                         );
 814
 815                         if ( $this->getUser()->isAllowed( 'suppressrevision' ) ) {
 816                                 $fields[] = new OOUI\FieldLayout(
 817                                         new OOUI\CheckboxInputWidget( [
 818                                                 'name' => 'wpUnsuppress',
 819                                                 'inputId' => 'mw-undelete-unsuppress',
 820                                                 'value' => '1',
 821                                         ] ),
 822                                         [
 823                                                 'label' => $this->msg( 'revdelete-unsuppress' )->text(),
 824                                                 'align' => 'inline',
 825                                         ]
 826                                 );
 827                         }
 828
 829                         $fieldset = new OOUI\FieldsetLayout( [
 830                                 'label' => $this->msg( 'undelete-fieldset-title' )->text(),
 831                                 'id' => 'mw-undelete-table',
 832                                 'items' => $fields,
 833                         ] );
 834
 835                         $form->appendContent(
 836                                 new OOUI\PanelLayout( [
 837                                         'expanded' => false,
 838                                         'padded' => true,
 839                                         'framed' => true,
 840                                         'content' => $fieldset,
 841                                 ] ),
 842                                 new OOUI\HtmlSnippet(
 843                                         Html::hidden( 'target', $this->mTarget ) .
 844                                         Html::hidden( 'wpEditToken', $this->getUser()->getEditToken() )
 845                                 )
 846                         );
 847                 }
 848
 849                 $history = '';
 850                 $history .= Xml::element( 'h2', null, $this->msg( 'history' )->text() ) . "\n";
 851
 852                 if ( $haveRevisions ) {
 853                         # Show the page's stored (deleted) history
 854
 855                         if ( $this->getUser()->isAllowed( 'deleterevision' ) ) {
 856                                 $history .= Html::element(
 857                                         'button',
 858                                         [
 859                                                 'name' => 'revdel',
 860                                                 'type' => 'submit',
 861                                                 'class' => 'deleterevision-log-submit mw-log-deleterevision-button'
 862                                         ],
 863                                         $this->msg( 'showhideselectedversions' )->text()
 864                                 ) . "\n";
 865                         }
 866
 867                         $history .= '<ul class="mw-undelete-revlist">';
 868                         $remaining = $revisions->numRows();
 869                         $earliestLiveTime = $this->mTargetObj->getEarliestRevTime();
 870
 871                         foreach ( $revisions as $row ) {
 872                                 $remaining--;
 873                                 $history .= $this->formatRevisionRow( $row, $earliestLiveTime, $remaining );
 874                         }
 875                         $revisions->free();
 876                         $history .= '</ul>';
 877                 } else {
 878                         $out->addWikiMsg( 'nohistory' );
 879                 }
 880
 881                 if ( $haveFiles ) {
 882                         $history .= Xml::element( 'h2', null, $this->msg( 'filehist' )->text() ) . "\n";
 883                         $history .= '<ul class="mw-undelete-revlist">';
 884                         foreach ( $files as $row ) {
 885                                 $history .= $this->formatFileRow( $row );
 886                         }
 887                         $files->free();
 888                         $history .= '</ul>';
 889                 }
 890
 891                 if ( $this->mAllowed ) {
 892                         # Slip in the hidden controls here
 893                         $misc = Html::hidden( 'target', $this->mTarget );
 894                         $misc .= Html::hidden( 'wpEditToken', $this->getUser()->getEditToken() );
 895                         $history .= $misc;
 896
 897                         $form->appendContent( new OOUI\HtmlSnippet( $history ) );
 898                         $out->addHTML( $form );
 899                 } else {
 900                         $out->addHTML( $history );
 901                 }
 902
 903                 return true;
 904         }
 905
 906         protected function formatRevisionRow( $row, $earliestLiveTime, $remaining ) {
 907                 $rev = Revision::newFromArchiveRow( $row,
 908                         [
 909                                 'title' => $this->mTargetObj
 910                         ] );
 911
 912                 $revTextSize = '';
 913                 $ts = wfTimestamp( TS_MW, $row->ar_timestamp );
 914                 // Build checkboxen...
 915                 if ( $this->mAllowed ) {
 916                         if ( $this->mInvert ) {
 917                                 if ( in_array( $ts, $this->mTargetTimestamp ) ) {
 918                                         $checkBox = Xml::check( "ts$ts" );
 919                                 } else {
 920                                         $checkBox = Xml::check( "ts$ts", true );
 921                                 }
 922                         } else {
 923                                 $checkBox = Xml::check( "ts$ts" );
 924                         }
 925                 } else {
 926                         $checkBox = '';
 927                 }
 928
 929                 // Build page & diff links...
 930                 $user = $this->getUser();
 931                 if ( $this->mCanView ) {
 932                         $titleObj = $this->getPageTitle();
 933                         # Last link
 934                         if ( !$rev->userCan( Revision::DELETED_TEXT, $this->getUser() ) ) {
 935                                 $pageLink = htmlspecialchars( $this->getLanguage()->userTimeAndDate( $ts, $user ) );
 936                                 $last = $this->msg( 'diff' )->escaped();
 937                         } elseif ( $remaining > 0 || ( $earliestLiveTime && $ts > $earliestLiveTime ) ) {
 938                                 $pageLink = $this->getPageLink( $rev, $titleObj, $ts );
 939                                 $last = $this->getLinkRenderer()->makeKnownLink(
 940                                         $titleObj,
 941                                         $this->msg( 'diff' )->text(),
 942                                         [],
 943                                         [
 944                                                 'target' => $this->mTargetObj->getPrefixedText(),
 945                                                 'timestamp' => $ts,
 946                                                 'diff' => 'prev'
 947                                         ]
 948                                 );
 949                         } else {
 950                                 $pageLink = $this->getPageLink( $rev, $titleObj, $ts );
 951                                 $last = $this->msg( 'diff' )->escaped();
 952                         }
 953                 } else {
 954                         $pageLink = htmlspecialchars( $this->getLanguage()->userTimeAndDate( $ts, $user ) );
 955                         $last = $this->msg( 'diff' )->escaped();
 956                 }
 957
 958                 // User links
 959                 $userLink = Linker::revUserTools( $rev );
 960
 961                 // Minor edit
 962                 $minor = $rev->isMinor() ? ChangesList::flag( 'minor' ) : '';
 963
 964                 // Revision text size
 965                 $size = $row->ar_len;
 966                 if ( !is_null( $size ) ) {
 967                         $revTextSize = Linker::formatRevisionSize( $size );
 968                 }
 969
 970                 // Edit summary
 971                 $comment = Linker::revComment( $rev );
 972
 973                 // Tags
 974                 $attribs = [];
 975                 list( $tagSummary, $classes ) = ChangeTags::formatSummaryRow(
 976                         $row->ts_tags,
 977                         'deletedhistory',
 978                         $this->getContext()
 979                 );
 980                 if ( $classes ) {
 981                         $attribs['class'] = implode( ' ', $classes );
 982                 }
 983
 984                 $revisionRow = $this->msg( 'undelete-revision-row2' )
 985                         ->rawParams(
 986                                 $checkBox,
 987                                 $last,
 988                                 $pageLink,
 989                                 $userLink,
 990                                 $minor,
 991                                 $revTextSize,
 992                                 $comment,
 993                                 $tagSummary
 994                         )
 995                         ->escaped();
 996
 997                 return Xml::tags( 'li', $attribs, $revisionRow ) . "\n";
 998         }
 999
1000         private function formatFileRow( $row ) {
1001                 $file = ArchivedFile::newFromRow( $row );
1002                 $ts = wfTimestamp( TS_MW, $row->fa_timestamp );
1003                 $user = $this->getUser();
1004
1005                 $checkBox = '';
1006                 if ( $this->mCanView && $row->fa_storage_key ) {
1007                         if ( $this->mAllowed ) {
1008                                 $checkBox = Xml::check( 'fileid' . $row->fa_id );
1009                         }
1010                         $key = urlencode( $row->fa_storage_key );
1011                         $pageLink = $this->getFileLink( $file, $this->getPageTitle(), $ts, $key );
1012                 } else {
1013                         $pageLink = htmlspecialchars( $this->getLanguage()->userTimeAndDate( $ts, $user ) );
1014                 }
1015                 $userLink = $this->getFileUser( $file );
1016                 $data = $this->msg( 'widthheight' )->numParams( $row->fa_width, $row->fa_height )->text();
1017                 $bytes = $this->msg( 'parentheses' )
1018                         ->plaintextParams( $this->msg( 'nbytes' )->numParams( $row->fa_size )->text() )
1019                         ->plain();
1020                 $data = htmlspecialchars( $data . ' ' . $bytes );
1021                 $comment = $this->getFileComment( $file );
1022
1023                 // Add show/hide deletion links if available
1024                 $canHide = $this->isAllowed( 'deleterevision' );
1025                 if ( $canHide || ( $file->getVisibility() && $this->isAllowed( 'deletedhistory' ) ) ) {
1026                         if ( !$file->userCan( File::DELETED_RESTRICTED, $user ) ) {
1027                                 // Revision was hidden from sysops
1028                                 $revdlink = Linker::revDeleteLinkDisabled( $canHide );
1029                         } else {
1030                                 $query = [
1031                                         'type' => 'filearchive',
1032                                         'target' => $this->mTargetObj->getPrefixedDBkey(),
1033                                         'ids' => $row->fa_id
1034                                 ];
1035                                 $revdlink = Linker::revDeleteLink( $query,
1036                                         $file->isDeleted( File::DELETED_RESTRICTED ), $canHide );
1037                         }
1038                 } else {
1039                         $revdlink = '';
1040                 }
1041
1042                 return "<li>$checkBox $revdlink $pageLink . . $userLink $data $comment</li>\n";
1043         }
1044
1045         /**
1046          * Fetch revision text link if it's available to all users
1047          *
1048          * @param Revision $rev
1049          * @param Title $titleObj
1050          * @param string $ts Timestamp
1051          * @return string
1052          */
1053         function getPageLink( $rev, $titleObj, $ts ) {
1054                 $user = $this->getUser();
1055                 $time = $this->getLanguage()->userTimeAndDate( $ts, $user );
1056
1057                 if ( !$rev->userCan( Revision::DELETED_TEXT, $user ) ) {
1058                         return '<span class="history-deleted">' . $time . '</span>';
1059                 }
1060
1061                 $link = $this->getLinkRenderer()->makeKnownLink(
1062                         $titleObj,
1063                         $time,
1064                         [],
1065                         [
1066                                 'target' => $this->mTargetObj->getPrefixedText(),
1067                                 'timestamp' => $ts
1068                         ]
1069                 );
1070
1071                 if ( $rev->isDeleted( Revision::DELETED_TEXT ) ) {
1072                         $link = '<span class="history-deleted">' . $link . '</span>';
1073                 }
1074
1075                 return $link;
1076         }
1077
1078         /**
1079          * Fetch image view link if it's available to all users
1080          *
1081          * @param File|ArchivedFile $file
1082          * @param Title $titleObj
1083          * @param string $ts A timestamp
1084          * @param string $key A storage key
1085          *
1086          * @return string HTML fragment
1087          */
1088         function getFileLink( $file, $titleObj, $ts, $key ) {
1089                 $user = $this->getUser();
1090                 $time = $this->getLanguage()->userTimeAndDate( $ts, $user );
1091
1092                 if ( !$file->userCan( File::DELETED_FILE, $user ) ) {
1093                         return '<span class="history-deleted">' . htmlspecialchars( $time ) . '</span>';
1094                 }
1095
1096                 $link = $this->getLinkRenderer()->makeKnownLink(
1097                         $titleObj,
1098                         $time,
1099                         [],
1100                         [
1101                                 'target' => $this->mTargetObj->getPrefixedText(),
1102                                 'file' => $key,
1103                                 'token' => $user->getEditToken( $key )
1104                         ]
1105                 );
1106
1107                 if ( $file->isDeleted( File::DELETED_FILE ) ) {
1108                         $link = '<span class="history-deleted">' . $link . '</span>';
1109                 }
1110
1111                 return $link;
1112         }
1113
1114         /**
1115          * Fetch file's user id if it's available to this user
1116          *
1117          * @param File|ArchivedFile $file
1118          * @return string HTML fragment
1119          */
1120         function getFileUser( $file ) {
1121                 if ( !$file->userCan( File::DELETED_USER, $this->getUser() ) ) {
1122                         return '<span class="history-deleted">' .
1123                                 $this->msg( 'rev-deleted-user' )->escaped() .
1124                                 '</span>';
1125                 }
1126
1127                 $link = Linker::userLink( $file->getRawUser(), $file->getRawUserText() ) .
1128                         Linker::userToolLinks( $file->getRawUser(), $file->getRawUserText() );
1129
1130                 if ( $file->isDeleted( File::DELETED_USER ) ) {
1131                         $link = '<span class="history-deleted">' . $link . '</span>';
1132                 }
1133
1134                 return $link;
1135         }
1136
1137         /**
1138          * Fetch file upload comment if it's available to this user
1139          *
1140          * @param File|ArchivedFile $file
1141          * @return string HTML fragment
1142          */
1143         function getFileComment( $file ) {
1144                 if ( !$file->userCan( File::DELETED_COMMENT, $this->getUser() ) ) {
1145                         return '<span class="history-deleted"><span class="comment">' .
1146                                 $this->msg( 'rev-deleted-comment' )->escaped() . '</span></span>';
1147                 }
1148
1149                 $link = Linker::commentBlock( $file->getRawDescription() );
1150
1151                 if ( $file->isDeleted( File::DELETED_COMMENT ) ) {
1152                         $link = '<span class="history-deleted">' . $link . '</span>';
1153                 }
1154
1155                 return $link;
1156         }
1157
1158         function undelete() {
1159                 if ( $this->getConfig()->get( 'UploadMaintenance' )
1160                         && $this->mTargetObj->getNamespace() == NS_FILE
1161                 ) {
1162                         throw new ErrorPageError( 'undelete-error', 'filedelete-maintenance' );
1163                 }
1164
1165                 $this->checkReadOnly();
1166
1167                 $out = $this->getOutput();
1168                 $archive = new PageArchive( $this->mTargetObj, $this->getConfig() );
1169                 Hooks::run( 'UndeleteForm::undelete', [ &$archive, $this->mTargetObj ] );
1170                 $ok = $archive->undelete(
1171                         $this->mTargetTimestamp,
1172                         $this->mComment,
1173                         $this->mFileVersions,
1174                         $this->mUnsuppress,
1175                         $this->getUser()
1176                 );
1177
1178                 if ( is_array( $ok ) ) {
1179                         if ( $ok[1] ) { // Undeleted file count
1180                                 Hooks::run( 'FileUndeleteComplete', [
1181                                         $this->mTargetObj, $this->mFileVersions,
1182                                         $this->getUser(), $this->mComment ] );
1183                         }
1184
1185                         $link = $this->getLinkRenderer()->makeKnownLink( $this->mTargetObj );
1186                         $out->addWikiMsg( 'undeletedpage', Message::rawParam( $link ) );
1187                 } else {
1188                         $out->setPageTitle( $this->msg( 'undelete-error' ) );
1189                 }
1190
1191                 // Show revision undeletion warnings and errors
1192                 $status = $archive->getRevisionStatus();
1193                 if ( $status && !$status->isGood() ) {
1194                         $out->wrapWikiTextAsInterface(
1195                                 'error',
1196                                 '<div id="mw-error-cannotundelete">' .
1197                                 $status->getWikiText(
1198                                         'cannotundelete',
1199                                         'cannotundelete'
1200                                 ) . '</div>'
1201                         );
1202                 }
1203
1204                 // Show file undeletion warnings and errors
1205                 $status = $archive->getFileStatus();
1206                 if ( $status && !$status->isGood() ) {
1207                         $out->wrapWikiTextAsInterface(
1208                                 'error',
1209                                 $status->getWikiText(
1210                                         'undelete-error-short',
1211                                         'undelete-error-long'
1212                                 )
1213                         );
1214                 }
1215         }
1216
1217         /**
1218          * Return an array of subpages beginning with $search that this special page will accept.
1219          *
1220          * @param string $search Prefix to search for
1221          * @param int $limit Maximum number of results to return (usually 10)
1222          * @param int $offset Number of results to skip (usually 0)
1223          * @return string[] Matching subpages
1224          */
1225         public function prefixSearchSubpages( $search, $limit, $offset ) {
1226                 return $this->prefixSearchString( $search, $limit, $offset );
1227         }
1228
1229         protected function getGroupName() {
1230                 return 'pagetools';
1231         }
1232 }