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         /** @var bool|null */
  49         private $mPreview;
  50         /** @var bool|null */
  51         private $mDiff;
  52         /** @var bool|null */
  53         private $mDiffOnly;
  54         /** @var bool|null */
  55         private $mUnsuppress;
  56         /** @var int[]|null */
  57         private $mFileVersions;
  58
  59         /** @var Title */
  60         private $mTargetObj;
  61         /**
  62          * @var string Search prefix
  63          */
  64         private $mSearchPrefix;
  65
  66         function __construct() {
  67                 parent::__construct( 'Undelete', 'deletedhistory' );
  68         }
  69
  70         public function doesWrites() {
  71                 return true;
  72         }
  73
  74         function loadRequest( $par ) {
  75                 $request = $this->getRequest();
  76                 $user = $this->getUser();
  77
  78                 $this->mAction = $request->getVal( 'action' );
  79                 if ( $par !== null && $par !== '' ) {
  80                         $this->mTarget = $par;
  81                 } else {
  82                         $this->mTarget = $request->getVal( 'target' );
  83                 }
  84
  85                 $this->mTargetObj = null;
  86
  87                 if ( $this->mTarget !== null && $this->mTarget !== '' ) {
  88                         $this->mTargetObj = Title::newFromText( $this->mTarget );
  89                 }
  90
  91                 $this->mSearchPrefix = $request->getText( 'prefix' );
  92                 $time = $request->getVal( 'timestamp' );
  93                 $this->mTimestamp = $time ? wfTimestamp( TS_MW, $time ) : '';
  94                 $this->mFilename = $request->getVal( 'file' );
  95
  96                 $posted = $request->wasPosted() &&
  97                         $user->matchEditToken( $request->getVal( 'wpEditToken' ) );
  98                 $this->mRestore = $request->getCheck( 'restore' ) && $posted;
  99                 $this->mRevdel = $request->getCheck( 'revdel' ) && $posted;
 100                 $this->mInvert = $request->getCheck( 'invert' ) && $posted;
 101                 $this->mPreview = $request->getCheck( 'preview' ) && $posted;
 102                 $this->mDiff = $request->getCheck( 'diff' );
 103                 $this->mDiffOnly = $request->getBool( 'diffonly', $this->getUser()->getOption( 'diffonly' ) );
 104                 $this->mComment = $request->getText( 'wpComment' );
 105                 $this->mUnsuppress = $request->getVal( 'wpUnsuppress' ) && $user->isAllowed( 'suppressrevision' );
 106                 $this->mToken = $request->getVal( 'token' );
 107
 108                 $block = $user->getBlock();
 109                 if ( $this->isAllowed( 'undelete' ) && !( $block && $block->isSitewide() ) ) {
 110                         $this->mAllowed = true; // user can restore
 111                         $this->mCanView = true; // user can view content
 112                 } elseif ( $this->isAllowed( 'deletedtext' ) ) {
 113                         $this->mAllowed = false; // user cannot restore
 114                         $this->mCanView = true; // user can view content
 115                         $this->mRestore = false;
 116                 } else { // user can only view the list of revisions
 117                         $this->mAllowed = false;
 118                         $this->mCanView = false;
 119                         $this->mTimestamp = '';
 120                         $this->mRestore = false;
 121                 }
 122
 123                 if ( $this->mRestore || $this->mInvert ) {
 124                         $timestamps = [];
 125                         $this->mFileVersions = [];
 126                         foreach ( $request->getValues() as $key => $val ) {
 127                                 $matches = [];
 128                                 if ( preg_match( '/^ts(\d{14})$/', $key, $matches ) ) {
 129                                         array_push( $timestamps, $matches[1] );
 130                                 }
 131
 132                                 if ( preg_match( '/^fileid(\d+)$/', $key, $matches ) ) {
 133                                         $this->mFileVersions[] = intval( $matches[1] );
 134                                 }
 135                         }
 136                         rsort( $timestamps );
 137                         $this->mTargetTimestamp = $timestamps;
 138                 }
 139         }
 140
 141         /**
 142          * Checks whether a user is allowed the permission for the
 143          * specific title if one is set.
 144          *
 145          * @param string $permission
 146          * @param User|null $user
 147          * @return bool
 148          */
 149         protected function isAllowed( $permission, User $user = null ) {
 150                 $user = $user ?: $this->getUser();
 151                 $permissionManager = MediaWikiServices::getInstance()->getPermissionManager();
 152
 153                 if ( $this->mTargetObj !== null ) {
 154                         return $permissionManager->userCan( $permission, $user, $this->mTargetObj );
 155                 } else {
 156                         return $user->isAllowed( $permission );
 157                 }
 158         }
 159
 160         function userCanExecute( User $user ) {
 161                 return $this->isAllowed( $this->mRestriction, $user );
 162         }
 163
 164         function execute( $par ) {
 165                 $this->useTransactionalTimeLimit();
 166
 167                 $user = $this->getUser();
 168
 169                 $this->setHeaders();
 170                 $this->outputHeader();
 171                 $this->addHelpLink( 'Help:Deletion_and_undeletion' );
 172
 173                 $this->loadRequest( $par );
 174                 $this->checkPermissions(); // Needs to be after mTargetObj is set
 175
 176                 $out = $this->getOutput();
 177
 178                 if ( is_null( $this->mTargetObj ) ) {
 179                         $out->addWikiMsg( 'undelete-header' );
 180
 181                         # Not all users can just browse every deleted page from the list
 182                         if ( $user->isAllowed( 'browsearchive' ) ) {
 183                                 $this->showSearchForm();
 184                         }
 185
 186                         return;
 187                 }
 188
 189                 $this->addHelpLink( 'Help:Undelete' );
 190                 if ( $this->mAllowed ) {
 191                         $out->setPageTitle( $this->msg( 'undeletepage' ) );
 192                 } else {
 193                         $out->setPageTitle( $this->msg( 'viewdeletedpage' ) );
 194                 }
 195
 196                 $this->getSkin()->setRelevantTitle( $this->mTargetObj );
 197
 198                 if ( $this->mTimestamp !== '' ) {
 199                         $this->showRevision( $this->mTimestamp );
 200                 } elseif ( $this->mFilename !== null && $this->mTargetObj->inNamespace( NS_FILE ) ) {
 201                         $file = new ArchivedFile( $this->mTargetObj, 0, $this->mFilename );
 202                         // Check if user is allowed to see this file
 203                         if ( !$file->exists() ) {
 204                                 $out->addWikiMsg( 'filedelete-nofile', $this->mFilename );
 205                         } elseif ( !$file->userCan( File::DELETED_FILE, $user ) ) {
 206                                 if ( $file->isDeleted( File::DELETED_RESTRICTED ) ) {
 207                                         throw new PermissionsError( 'suppressrevision' );
 208                                 } else {
 209                                         throw new PermissionsError( 'deletedtext' );
 210                                 }
 211                         } elseif ( !$user->matchEditToken( $this->mToken, $this->mFilename ) ) {
 212                                 $this->showFileConfirmationForm( $this->mFilename );
 213                         } else {
 214                                 $this->showFile( $this->mFilename );
 215                         }
 216                 } elseif ( $this->mAction === 'submit' ) {
 217                         if ( $this->mRestore ) {
 218                                 $this->undelete();
 219                         } elseif ( $this->mRevdel ) {
 220                                 $this->redirectToRevDel();
 221                         }
 222
 223                 } else {
 224                         $this->showHistory();
 225                 }
 226         }
 227
 228         /**
 229          * Convert submitted form data to format expected by RevisionDelete and
 230          * redirect the request
 231          */
 232         private function redirectToRevDel() {
 233                 $archive = new PageArchive( $this->mTargetObj );
 234
 235                 $revisions = [];
 236
 237                 foreach ( $this->getRequest()->getValues() as $key => $val ) {
 238                         $matches = [];
 239                         if ( preg_match( "/^ts(\d{14})$/", $key, $matches ) ) {
 240                                 $revisions[$archive->getRevision( $matches[1] )->getId()] = 1;
 241                         }
 242                 }
 243
 244                 $query = [
 245                         'type' => 'revision',
 246                         'ids' => $revisions,
 247                         'target' => $this->mTargetObj->getPrefixedText()
 248                 ];
 249                 $url = SpecialPage::getTitleFor( 'Revisiondelete' )->getFullURL( $query );
 250                 $this->getOutput()->redirect( $url );
 251         }
 252
 253         function showSearchForm() {
 254                 $out = $this->getOutput();
 255                 $out->setPageTitle( $this->msg( 'undelete-search-title' ) );
 256                 $fuzzySearch = $this->getRequest()->getVal( 'fuzzy', true );
 257
 258                 $out->enableOOUI();
 259
 260                 $fields = [];
 261                 $fields[] = new OOUI\ActionFieldLayout(
 262                         new OOUI\TextInputWidget( [
 263                                 'name' => 'prefix',
 264                                 'inputId' => 'prefix',
 265                                 'infusable' => true,
 266                                 'value' => $this->mSearchPrefix,
 267                                 'autofocus' => true,
 268                         ] ),
 269                         new OOUI\ButtonInputWidget( [
 270                                 'label' => $this->msg( 'undelete-search-submit' )->text(),
 271                                 'flags' => [ 'primary', 'progressive' ],
 272                                 'inputId' => 'searchUndelete',
 273                                 'type' => 'submit',
 274                         ] ),
 275                         [
 276                                 'label' => new OOUI\HtmlSnippet(
 277                                         $this->msg(
 278                                                 $fuzzySearch ? 'undelete-search-full' : 'undelete-search-prefix'
 279                                         )->parse()
 280                                 ),
 281                                 'align' => 'left',
 282                         ]
 283                 );
 284
 285                 $fieldset = new OOUI\FieldsetLayout( [
 286                         'label' => $this->msg( 'undelete-search-box' )->text(),
 287                         'items' => $fields,
 288                 ] );
 289
 290                 $form = new OOUI\FormLayout( [
 291                         'method' => 'get',
 292                         'action' => wfScript(),
 293                 ] );
 294
 295                 $form->appendContent(
 296                         $fieldset,
 297                         new OOUI\HtmlSnippet(
 298                                 Html::hidden( 'title', $this->getPageTitle()->getPrefixedDBkey() ) .
 299                                 Html::hidden( 'fuzzy', $fuzzySearch )
 300                         )
 301                 );
 302
 303                 $out->addHTML(
 304                         new OOUI\PanelLayout( [
 305                                 'expanded' => false,
 306                                 'padded' => true,
 307                                 'framed' => true,
 308                                 'content' => $form,
 309                         ] )
 310                 );
 311
 312                 # List undeletable articles
 313                 if ( $this->mSearchPrefix ) {
 314                         // For now, we enable search engine match only when specifically asked to
 315                         // by using fuzzy=1 parameter.
 316                         if ( $fuzzySearch ) {
 317                                 $result = PageArchive::listPagesBySearch( $this->mSearchPrefix );
 318                         } else {
 319                                 $result = PageArchive::listPagesByPrefix( $this->mSearchPrefix );
 320                         }
 321                         $this->showList( $result );
 322                 }
 323         }
 324
 325         /**
 326          * Generic list of deleted pages
 327          *
 328          * @param IResultWrapper $result
 329          * @return bool
 330          */
 331         private function showList( $result ) {
 332                 $out = $this->getOutput();
 333
 334                 if ( $result->numRows() == 0 ) {
 335                         $out->addWikiMsg( 'undelete-no-results' );
 336
 337                         return false;
 338                 }
 339
 340                 $out->addWikiMsg( 'undeletepagetext', $this->getLanguage()->formatNum( $result->numRows() ) );
 341
 342                 $linkRenderer = $this->getLinkRenderer();
 343                 $undelete = $this->getPageTitle();
 344                 $out->addHTML( "<ul id='undeleteResultsList'>\n" );
 345                 foreach ( $result as $row ) {
 346                         $title = Title::makeTitleSafe( $row->ar_namespace, $row->ar_title );
 347                         if ( $title !== null ) {
 348                                 $item = $linkRenderer->makeKnownLink(
 349                                         $undelete,
 350                                         $title->getPrefixedText(),
 351                                         [],
 352                                         [ 'target' => $title->getPrefixedText() ]
 353                                 );
 354                         } else {
 355                                 // The title is no longer valid, show as text
 356                                 $item = Html::element(
 357                                         'span',
 358                                         [ 'class' => 'mw-invalidtitle' ],
 359                                         Linker::getInvalidTitleDescription(
 360                                                 $this->getContext(),
 361                                                 $row->ar_namespace,
 362                                                 $row->ar_title
 363                                         )
 364                                 );
 365                         }
 366                         $revs = $this->msg( 'undeleterevisions' )->numParams( $row->count )->parse();
 367                         $out->addHTML(
 368                                 Html::rawElement(
 369                                         'li',
 370                                         [ 'class' => 'undeleteResult' ],
 371                                         "{$item} ({$revs})"
 372                                 )
 373                         );
 374                 }
 375                 $result->free();
 376                 $out->addHTML( "</ul>\n" );
 377
 378                 return true;
 379         }
 380
 381         private function showRevision( $timestamp ) {
 382                 if ( !preg_match( '/[0-9]{14}/', $timestamp ) ) {
 383                         return;
 384                 }
 385
 386                 $archive = new PageArchive( $this->mTargetObj, $this->getConfig() );
 387                 if ( !Hooks::run( 'UndeleteForm::showRevision', [ &$archive, $this->mTargetObj ] ) ) {
 388                         return;
 389                 }
 390                 $rev = $archive->getRevision( $timestamp );
 391
 392                 $out = $this->getOutput();
 393                 $user = $this->getUser();
 394
 395                 if ( !$rev ) {
 396                         $out->addWikiMsg( 'undeleterevision-missing' );
 397
 398                         return;
 399                 }
 400
 401                 if ( $rev->isDeleted( RevisionRecord::DELETED_TEXT ) ) {
 402                         if ( !$rev->userCan( RevisionRecord::DELETED_TEXT, $user ) ) {
 403                                 $out->wrapWikiMsg(
 404                                         "<div class='mw-warning plainlinks'>\n$1\n</div>\n",
 405                                 $rev->isDeleted( RevisionRecord::DELETED_RESTRICTED ) ?
 406                                         'rev-suppressed-text-permission' : 'rev-deleted-text-permission'
 407                                 );
 408
 409                                 return;
 410                         }
 411
 412                         $out->wrapWikiMsg(
 413                                 "<div class='mw-warning plainlinks'>\n$1\n</div>\n",
 414                                 $rev->isDeleted( RevisionRecord::DELETED_RESTRICTED ) ?
 415                                         'rev-suppressed-text-view' : 'rev-deleted-text-view'
 416                         );
 417                         $out->addHTML( '<br />' );
 418                         // and we are allowed to see...
 419                 }
 420
 421                 if ( $this->mDiff ) {
 422                         $previousRev = $archive->getPreviousRevision( $timestamp );
 423                         if ( $previousRev ) {
 424                                 $this->showDiff( $previousRev, $rev );
 425                                 if ( $this->mDiffOnly ) {
 426                                         return;
 427                                 }
 428
 429                                 $out->addHTML( '<hr />' );
 430                         } else {
 431                                 $out->addWikiMsg( 'undelete-nodiff' );
 432                         }
 433                 }
 434
 435                 $link = $this->getLinkRenderer()->makeKnownLink(
 436                         $this->getPageTitle( $this->mTargetObj->getPrefixedDBkey() ),
 437                         $this->mTargetObj->getPrefixedText()
 438                 );
 439
 440                 $lang = $this->getLanguage();
 441
 442                 // date and time are separate parameters to facilitate localisation.
 443                 // $time is kept for backward compat reasons.
 444                 $time = $lang->userTimeAndDate( $timestamp, $user );
 445                 $d = $lang->userDate( $timestamp, $user );
 446                 $t = $lang->userTime( $timestamp, $user );
 447                 $userLink = Linker::revUserTools( $rev );
 448
 449                 $content = $rev->getContent( RevisionRecord::FOR_THIS_USER, $user );
 450
 451                 // TODO: MCR: this will have to become something like $hasTextSlots and $hasNonTextSlots
 452                 $isText = ( $content instanceof TextContent );
 453
 454                 if ( $this->mPreview || $isText ) {
 455                         $openDiv = '<div id="mw-undelete-revision" class="mw-warning">';
 456                 } else {
 457                         $openDiv = '<div id="mw-undelete-revision">';
 458                 }
 459                 $out->addHTML( $openDiv );
 460
 461                 // Revision delete links
 462                 if ( !$this->mDiff ) {
 463                         $revdel = Linker::getRevDeleteLink( $user, $rev, $this->mTargetObj );
 464                         if ( $revdel ) {
 465                                 $out->addHTML( "$revdel " );
 466                         }
 467                 }
 468
 469                 $out->addWikiMsg(
 470                         'undelete-revision',
 471                         Message::rawParam( $link ), $time,
 472                         Message::rawParam( $userLink ), $d, $t
 473                 );
 474                 $out->addHTML( '</div>' );
 475
 476                 if ( !Hooks::run( 'UndeleteShowRevision', [ $this->mTargetObj, $rev ] ) ) {
 477                         return;
 478                 }
 479
 480                 if ( $this->mPreview || !$isText ) {
 481                         // NOTE: non-text content has no source view, so always use rendered preview
 482
 483                         $popts = $out->parserOptions();
 484                         $renderer = MediaWikiServices::getInstance()->getRevisionRenderer();
 485
 486                         $rendered = $renderer->getRenderedRevision(
 487                                 $rev->getRevisionRecord(),
 488                                 $popts,
 489                                 $user,
 490                                 [ 'audience' => RevisionRecord::FOR_THIS_USER ]
 491                         );
 492
 493                         // Fail hard if the audience check fails, since we already checked
 494                         // at the beginning of this method.
 495                         $pout = $rendered->getRevisionParserOutput();
 496
 497                         $out->addParserOutput( $pout, [
 498                                 'enableSectionEditLinks' => false,
 499                         ] );
 500                 }
 501
 502                 $out->enableOOUI();
 503                 $buttonFields = [];
 504
 505                 if ( $isText ) {
 506                         '@phan-var TextContent $content';
 507                         // TODO: MCR: make this work for multiple slots
 508                         // source view for textual content
 509                         $sourceView = Xml::element( 'textarea', [
 510                                 'readonly' => 'readonly',
 511                                 'cols' => 80,
 512                                 'rows' => 25
 513                         ], $content->getText() . "\n" );
 514
 515                         $buttonFields[] = new OOUI\ButtonInputWidget( [
 516                                 'type' => 'submit',
 517                                 'name' => 'preview',
 518                                 'label' => $this->msg( 'showpreview' )->text()
 519                         ] );
 520                 } else {
 521                         $sourceView = '';
 522                 }
 523
 524                 $buttonFields[] = new OOUI\ButtonInputWidget( [
 525                         'name' => 'diff',
 526                         'type' => 'submit',
 527                         'label' => $this->msg( 'showdiff' )->text()
 528                 ] );
 529
 530                 $out->addHTML(
 531                         $sourceView .
 532                                 Xml::openElement( 'div', [
 533                                         'style' => 'clear: both' ] ) .
 534                                 Xml::openElement( 'form', [
 535                                         'method' => 'post',
 536                                         'action' => $this->getPageTitle()->getLocalURL( [ 'action' => 'submit' ] ) ] ) .
 537                                 Xml::element( 'input', [
 538                                         'type' => 'hidden',
 539                                         'name' => 'target',
 540                                         'value' => $this->mTargetObj->getPrefixedDBkey() ] ) .
 541                                 Xml::element( 'input', [
 542                                         'type' => 'hidden',
 543                                         'name' => 'timestamp',
 544                                         'value' => $timestamp ] ) .
 545                                 Xml::element( 'input', [
 546                                         'type' => 'hidden',
 547                                         'name' => 'wpEditToken',
 548                                         'value' => $user->getEditToken() ] ) .
 549                                 new OOUI\FieldLayout(
 550                                         new OOUI\Widget( [
 551                                                 'content' => new OOUI\HorizontalLayout( [
 552                                                         'items' => $buttonFields
 553                                                 ] )
 554                                         ] )
 555                                 ) .
 556                                 Xml::closeElement( 'form' ) .
 557                                 Xml::closeElement( 'div' )
 558                 );
 559         }
 560
 561         /**
 562          * Build a diff display between this and the previous either deleted
 563          * or non-deleted edit.
 564          *
 565          * @param Revision $previousRev
 566          * @param Revision $currentRev
 567          */
 568         function showDiff( $previousRev, $currentRev ) {
 569                 $diffContext = clone $this->getContext();
 570                 $diffContext->setTitle( $currentRev->getTitle() );
 571                 $diffContext->setWikiPage( WikiPage::factory( $currentRev->getTitle() ) );
 572
 573                 $diffEngine = $currentRev->getContentHandler()->createDifferenceEngine( $diffContext );
 574                 $diffEngine->setRevisions( $previousRev->getRevisionRecord(), $currentRev->getRevisionRecord() );
 575                 $diffEngine->showDiffStyle();
 576                 $formattedDiff = $diffEngine->getDiff(
 577                         $this->diffHeader( $previousRev, 'o' ),
 578                         $this->diffHeader( $currentRev, 'n' )
 579                 );
 580
 581                 $this->getOutput()->addHTML( "<div>$formattedDiff</div>\n" );
 582         }
 583
 584         /**
 585          * @param Revision $rev
 586          * @param string $prefix
 587          * @return string
 588          */
 589         private function diffHeader( $rev, $prefix ) {
 590                 $isDeleted = !( $rev->getId() && $rev->getTitle() );
 591                 if ( $isDeleted ) {
 592                         /// @todo FIXME: $rev->getTitle() is null for deleted revs...?
 593                         $targetPage = $this->getPageTitle();
 594                         $targetQuery = [
 595                                 'target' => $this->mTargetObj->getPrefixedText(),
 596                                 'timestamp' => wfTimestamp( TS_MW, $rev->getTimestamp() )
 597                         ];
 598                 } else {
 599                         /// @todo FIXME: getId() may return non-zero for deleted revs...
 600                         $targetPage = $rev->getTitle();
 601                         $targetQuery = [ 'oldid' => $rev->getId() ];
 602                 }
 603
 604                 // Add show/hide deletion links if available
 605                 $user = $this->getUser();
 606                 $lang = $this->getLanguage();
 607                 $rdel = Linker::getRevDeleteLink( $user, $rev, $this->mTargetObj );
 608
 609                 if ( $rdel ) {
 610                         $rdel = " $rdel";
 611                 }
 612
 613                 $minor = $rev->isMinor() ? ChangesList::flag( 'minor' ) : '';
 614
 615                 $tagIds = wfGetDB( DB_REPLICA )->selectFieldValues(
 616                         'change_tag',
 617                         'ct_tag_id',
 618                         [ 'ct_rev_id' => $rev->getId() ],
 619                         __METHOD__
 620                 );
 621                 $tags = [];
 622                 $changeTagDefStore = MediaWikiServices::getInstance()->getChangeTagDefStore();
 623                 foreach ( $tagIds as $tagId ) {
 624                         try {
 625                                 $tags[] = $changeTagDefStore->getName( (int)$tagId );
 626                         } catch ( NameTableAccessException $exception ) {
 627                                 continue;
 628                         }
 629                 }
 630                 $tags = implode( ',', $tags );
 631                 $tagSummary = ChangeTags::formatSummaryRow( $tags, 'deleteddiff', $this->getContext() );
 632
 633                 // FIXME This is reimplementing DifferenceEngine#getRevisionHeader
 634                 // and partially #showDiffPage, but worse
 635                 return '<div id="mw-diff-' . $prefix . 'title1"><strong>' .
 636                         $this->getLinkRenderer()->makeLink(
 637                                 $targetPage,
 638                                 $this->msg(
 639                                         'revisionasof',
 640                                         $lang->userTimeAndDate( $rev->getTimestamp(), $user ),
 641                                         $lang->userDate( $rev->getTimestamp(), $user ),
 642                                         $lang->userTime( $rev->getTimestamp(), $user )
 643                                 )->text(),
 644                                 [],
 645                                 $targetQuery
 646                         ) .
 647                         '</strong></div>' .
 648                         '<div id="mw-diff-' . $prefix . 'title2">' .
 649                         Linker::revUserTools( $rev ) . '<br />' .
 650                         '</div>' .
 651                         '<div id="mw-diff-' . $prefix . 'title3">' .
 652                         $minor . Linker::revComment( $rev ) . $rdel . '<br />' .
 653                         '</div>' .
 654                         '<div id="mw-diff-' . $prefix . 'title5">' .
 655                         $tagSummary[0] . '<br />' .
 656                         '</div>';
 657         }
 658
 659         /**
 660          * Show a form confirming whether a tokenless user really wants to see a file
 661          * @param string $key
 662          */
 663         private function showFileConfirmationForm( $key ) {
 664                 $out = $this->getOutput();
 665                 $lang = $this->getLanguage();
 666                 $user = $this->getUser();
 667                 $file = new ArchivedFile( $this->mTargetObj, 0, $this->mFilename );
 668                 $out->addWikiMsg( 'undelete-show-file-confirm',
 669                         $this->mTargetObj->getText(),
 670                         $lang->userDate( $file->getTimestamp(), $user ),
 671                         $lang->userTime( $file->getTimestamp(), $user ) );
 672                 $out->addHTML(
 673                         Xml::openElement( 'form', [
 674                                         'method' => 'POST',
 675                                         'action' => $this->getPageTitle()->getLocalURL( [
 676                                                 'target' => $this->mTarget,
 677                                                 'file' => $key,
 678                                                 'token' => $user->getEditToken( $key ),
 679                                         ] ),
 680                                 ]
 681                         ) .
 682                                 Xml::submitButton( $this->msg( 'undelete-show-file-submit' )->text() ) .
 683                                 '</form>'
 684                 );
 685         }
 686
 687         /**
 688          * Show a deleted file version requested by the visitor.
 689          * @param string $key
 690          */
 691         private function showFile( $key ) {
 692                 $this->getOutput()->disable();
 693
 694                 # We mustn't allow the output to be CDN cached, otherwise
 695                 # if an admin previews a deleted image, and it's cached, then
 696                 # a user without appropriate permissions can toddle off and
 697                 # nab the image, and CDN will serve it
 698                 $response = $this->getRequest()->response();
 699                 $response->header( 'Expires: ' . gmdate( 'D, d M Y H:i:s', 0 ) . ' GMT' );
 700                 $response->header( 'Cache-Control: no-cache, no-store, max-age=0, must-revalidate' );
 701                 $response->header( 'Pragma: no-cache' );
 702
 703                 $repo = RepoGroup::singleton()->getLocalRepo();
 704                 $path = $repo->getZonePath( 'deleted' ) . '/' . $repo->getDeletedHashPath( $key ) . $key;
 705                 $repo->streamFileWithStatus( $path );
 706         }
 707
 708         protected function showHistory() {
 709                 $this->checkReadOnly();
 710
 711                 $out = $this->getOutput();
 712                 if ( $this->mAllowed ) {
 713                         $out->addModules( 'mediawiki.special.undelete' );
 714                 }
 715                 $out->wrapWikiMsg(
 716                         "<div class='mw-undelete-pagetitle'>\n$1\n</div>\n",
 717                         [ 'undeletepagetitle', wfEscapeWikiText( $this->mTargetObj->getPrefixedText() ) ]
 718                 );
 719
 720                 $archive = new PageArchive( $this->mTargetObj, $this->getConfig() );
 721                 Hooks::run( 'UndeleteForm::showHistory', [ &$archive, $this->mTargetObj ] );
 722
 723                 $out->addHTML( '<div class="mw-undelete-history">' );
 724                 if ( $this->mAllowed ) {
 725                         $out->addWikiMsg( 'undeletehistory' );
 726                         $out->addWikiMsg( 'undeleterevdel' );
 727                 } else {
 728                         $out->addWikiMsg( 'undeletehistorynoadmin' );
 729                 }
 730                 $out->addHTML( '</div>' );
 731
 732                 # List all stored revisions
 733                 $revisions = $archive->listRevisions();
 734                 $files = $archive->listFiles();
 735
 736                 $haveRevisions = $revisions && $revisions->numRows() > 0;
 737                 $haveFiles = $files && $files->numRows() > 0;
 738
 739                 # Batch existence check on user and talk pages
 740                 if ( $haveRevisions ) {
 741                         $batch = new LinkBatch();
 742                         foreach ( $revisions as $row ) {
 743                                 $batch->addObj( Title::makeTitleSafe( NS_USER, $row->ar_user_text ) );
 744                                 $batch->addObj( Title::makeTitleSafe( NS_USER_TALK, $row->ar_user_text ) );
 745                         }
 746                         $batch->execute();
 747                         $revisions->seek( 0 );
 748                 }
 749                 if ( $haveFiles ) {
 750                         $batch = new LinkBatch();
 751                         foreach ( $files as $row ) {
 752                                 $batch->addObj( Title::makeTitleSafe( NS_USER, $row->fa_user_text ) );
 753                                 $batch->addObj( Title::makeTitleSafe( NS_USER_TALK, $row->fa_user_text ) );
 754                         }
 755                         $batch->execute();
 756                         $files->seek( 0 );
 757                 }
 758
 759                 if ( $this->mAllowed ) {
 760                         $out->enableOOUI();
 761
 762                         $action = $this->getPageTitle()->getLocalURL( [ 'action' => 'submit' ] );
 763                         # Start the form here
 764                         $form = new OOUI\FormLayout( [
 765                                 'method' => 'post',
 766                                 'action' => $action,
 767                                 'id' => 'undelete',
 768                         ] );
 769                 }
 770
 771                 # Show relevant lines from the deletion log:
 772                 $deleteLogPage = new LogPage( 'delete' );
 773                 $out->addHTML( Xml::element( 'h2', null, $deleteLogPage->getName()->text() ) . "\n" );
 774                 LogEventsList::showLogExtract( $out, 'delete', $this->mTargetObj );
 775                 # Show relevant lines from the suppression log:
 776                 $suppressLogPage = new LogPage( 'suppress' );
 777                 if ( $this->getUser()->isAllowed( 'suppressionlog' ) ) {
 778                         $out->addHTML( Xml::element( 'h2', null, $suppressLogPage->getName()->text() ) . "\n" );
 779                         LogEventsList::showLogExtract( $out, 'suppress', $this->mTargetObj );
 780                 }
 781
 782                 if ( $this->mAllowed && ( $haveRevisions || $haveFiles ) ) {
 783                         $fields = [];
 784                         $fields[] = new OOUI\Layout( [
 785                                 'content' => new OOUI\HtmlSnippet( $this->msg( 'undeleteextrahelp' )->parseAsBlock() )
 786                         ] );
 787
 788                         $fields[] = new OOUI\FieldLayout(
 789                                 new OOUI\TextInputWidget( [
 790                                         'name' => 'wpComment',
 791                                         'inputId' => 'wpComment',
 792                                         'infusable' => true,
 793                                         'value' => $this->mComment,
 794                                         'autofocus' => true,
 795                                         // HTML maxlength uses "UTF-16 code units", which means that characters outside BMP
 796                                         // (e.g. emojis) count for two each. This limit is overridden in JS to instead count
 797                                         // Unicode codepoints.
 798                                         'maxLength' => CommentStore::COMMENT_CHARACTER_LIMIT,
 799                                 ] ),
 800                                 [
 801                                         'label' => $this->msg( 'undeletecomment' )->text(),
 802                                         'align' => 'top',
 803                                 ]
 804                         );
 805
 806                         $fields[] = new OOUI\FieldLayout(
 807                                 new OOUI\Widget( [
 808                                         'content' => new OOUI\HorizontalLayout( [
 809                                                 'items' => [
 810                                                         new OOUI\ButtonInputWidget( [
 811                                                                 'name' => 'restore',
 812                                                                 'inputId' => 'mw-undelete-submit',
 813                                                                 'value' => '1',
 814                                                                 'label' => $this->msg( 'undeletebtn' )->text(),
 815                                                                 'flags' => [ 'primary', 'progressive' ],
 816                                                                 'type' => 'submit',
 817                                                         ] ),
 818                                                         new OOUI\ButtonInputWidget( [
 819                                                                 'name' => 'invert',
 820                                                                 'inputId' => 'mw-undelete-invert',
 821                                                                 'value' => '1',
 822                                                                 'label' => $this->msg( 'undeleteinvert' )->text()
 823                                                         ] ),
 824                                                 ]
 825                                         ] )
 826                                 ] )
 827                         );
 828
 829                         if ( $this->getUser()->isAllowed( 'suppressrevision' ) ) {
 830                                 $fields[] = new OOUI\FieldLayout(
 831                                         new OOUI\CheckboxInputWidget( [
 832                                                 'name' => 'wpUnsuppress',
 833                                                 'inputId' => 'mw-undelete-unsuppress',
 834                                                 'value' => '1',
 835                                         ] ),
 836                                         [
 837                                                 'label' => $this->msg( 'revdelete-unsuppress' )->text(),
 838                                                 'align' => 'inline',
 839                                         ]
 840                                 );
 841                         }
 842
 843                         $fieldset = new OOUI\FieldsetLayout( [
 844                                 'label' => $this->msg( 'undelete-fieldset-title' )->text(),
 845                                 'id' => 'mw-undelete-table',
 846                                 'items' => $fields,
 847                         ] );
 848
 849                         $form->appendContent(
 850                                 new OOUI\PanelLayout( [
 851                                         'expanded' => false,
 852                                         'padded' => true,
 853                                         'framed' => true,
 854                                         'content' => $fieldset,
 855                                 ] ),
 856                                 new OOUI\HtmlSnippet(
 857                                         Html::hidden( 'target', $this->mTarget ) .
 858                                         Html::hidden( 'wpEditToken', $this->getUser()->getEditToken() )
 859                                 )
 860                         );
 861                 }
 862
 863                 $history = '';
 864                 $history .= Xml::element( 'h2', null, $this->msg( 'history' )->text() ) . "\n";
 865
 866                 if ( $haveRevisions ) {
 867                         # Show the page's stored (deleted) history
 868
 869                         if ( $this->getUser()->isAllowed( 'deleterevision' ) ) {
 870                                 $history .= Html::element(
 871                                         'button',
 872                                         [
 873                                                 'name' => 'revdel',
 874                                                 'type' => 'submit',
 875                                                 'class' => 'deleterevision-log-submit mw-log-deleterevision-button'
 876                                         ],
 877                                         $this->msg( 'showhideselectedversions' )->text()
 878                                 ) . "\n";
 879                         }
 880
 881                         $history .= '<ul class="mw-undelete-revlist">';
 882                         $remaining = $revisions->numRows();
 883                         $earliestLiveTime = $this->mTargetObj->getEarliestRevTime();
 884
 885                         foreach ( $revisions as $row ) {
 886                                 $remaining--;
 887                                 $history .= $this->formatRevisionRow( $row, $earliestLiveTime, $remaining );
 888                         }
 889                         $revisions->free();
 890                         $history .= '</ul>';
 891                 } else {
 892                         $out->addWikiMsg( 'nohistory' );
 893                 }
 894
 895                 if ( $haveFiles ) {
 896                         $history .= Xml::element( 'h2', null, $this->msg( 'filehist' )->text() ) . "\n";
 897                         $history .= '<ul class="mw-undelete-revlist">';
 898                         foreach ( $files as $row ) {
 899                                 $history .= $this->formatFileRow( $row );
 900                         }
 901                         $files->free();
 902                         $history .= '</ul>';
 903                 }
 904
 905                 if ( $this->mAllowed ) {
 906                         # Slip in the hidden controls here
 907                         $misc = Html::hidden( 'target', $this->mTarget );
 908                         $misc .= Html::hidden( 'wpEditToken', $this->getUser()->getEditToken() );
 909                         $history .= $misc;
 910
 911                         $form->appendContent( new OOUI\HtmlSnippet( $history ) );
 912                         $out->addHTML( $form );
 913                 } else {
 914                         $out->addHTML( $history );
 915                 }
 916
 917                 return true;
 918         }
 919
 920         protected function formatRevisionRow( $row, $earliestLiveTime, $remaining ) {
 921                 $rev = Revision::newFromArchiveRow( $row,
 922                         [
 923                                 'title' => $this->mTargetObj
 924                         ] );
 925
 926                 $revTextSize = '';
 927                 $ts = wfTimestamp( TS_MW, $row->ar_timestamp );
 928                 // Build checkboxen...
 929                 if ( $this->mAllowed ) {
 930                         if ( $this->mInvert ) {
 931                                 if ( in_array( $ts, $this->mTargetTimestamp ) ) {
 932                                         $checkBox = Xml::check( "ts$ts" );
 933                                 } else {
 934                                         $checkBox = Xml::check( "ts$ts", true );
 935                                 }
 936                         } else {
 937                                 $checkBox = Xml::check( "ts$ts" );
 938                         }
 939                 } else {
 940                         $checkBox = '';
 941                 }
 942
 943                 // Build page & diff links...
 944                 $user = $this->getUser();
 945                 if ( $this->mCanView ) {
 946                         $titleObj = $this->getPageTitle();
 947                         # Last link
 948                         if ( !$rev->userCan( RevisionRecord::DELETED_TEXT, $this->getUser() ) ) {
 949                                 $pageLink = htmlspecialchars( $this->getLanguage()->userTimeAndDate( $ts, $user ) );
 950                                 $last = $this->msg( 'diff' )->escaped();
 951                         } elseif ( $remaining > 0 || ( $earliestLiveTime && $ts > $earliestLiveTime ) ) {
 952                                 $pageLink = $this->getPageLink( $rev, $titleObj, $ts );
 953                                 $last = $this->getLinkRenderer()->makeKnownLink(
 954                                         $titleObj,
 955                                         $this->msg( 'diff' )->text(),
 956                                         [],
 957                                         [
 958                                                 'target' => $this->mTargetObj->getPrefixedText(),
 959                                                 'timestamp' => $ts,
 960                                                 'diff' => 'prev'
 961                                         ]
 962                                 );
 963                         } else {
 964                                 $pageLink = $this->getPageLink( $rev, $titleObj, $ts );
 965                                 $last = $this->msg( 'diff' )->escaped();
 966                         }
 967                 } else {
 968                         $pageLink = htmlspecialchars( $this->getLanguage()->userTimeAndDate( $ts, $user ) );
 969                         $last = $this->msg( 'diff' )->escaped();
 970                 }
 971
 972                 // User links
 973                 $userLink = Linker::revUserTools( $rev );
 974
 975                 // Minor edit
 976                 $minor = $rev->isMinor() ? ChangesList::flag( 'minor' ) : '';
 977
 978                 // Revision text size
 979                 $size = $row->ar_len;
 980                 if ( !is_null( $size ) ) {
 981                         $revTextSize = Linker::formatRevisionSize( $size );
 982                 }
 983
 984                 // Edit summary
 985                 $comment = Linker::revComment( $rev );
 986
 987                 // Tags
 988                 $attribs = [];
 989                 list( $tagSummary, $classes ) = ChangeTags::formatSummaryRow(
 990                         $row->ts_tags,
 991                         'deletedhistory',
 992                         $this->getContext()
 993                 );
 994                 if ( $classes ) {
 995                         $attribs['class'] = implode( ' ', $classes );
 996                 }
 997
 998                 $revisionRow = $this->msg( 'undelete-revision-row2' )
 999                         ->rawParams(
1000                                 $checkBox,
1001                                 $last,
1002                                 $pageLink,
1003                                 $userLink,
1004                                 $minor,
1005                                 $revTextSize,
1006                                 $comment,
1007                                 $tagSummary
1008                         )
1009                         ->escaped();
1010
1011                 return Xml::tags( 'li', $attribs, $revisionRow ) . "\n";
1012         }
1013
1014         private function formatFileRow( $row ) {
1015                 $file = ArchivedFile::newFromRow( $row );
1016                 $ts = wfTimestamp( TS_MW, $row->fa_timestamp );
1017                 $user = $this->getUser();
1018
1019                 $checkBox = '';
1020                 if ( $this->mCanView && $row->fa_storage_key ) {
1021                         if ( $this->mAllowed ) {
1022                                 $checkBox = Xml::check( 'fileid' . $row->fa_id );
1023                         }
1024                         $key = urlencode( $row->fa_storage_key );
1025                         $pageLink = $this->getFileLink( $file, $this->getPageTitle(), $ts, $key );
1026                 } else {
1027                         $pageLink = htmlspecialchars( $this->getLanguage()->userTimeAndDate( $ts, $user ) );
1028                 }
1029                 $userLink = $this->getFileUser( $file );
1030                 $data = $this->msg( 'widthheight' )->numParams( $row->fa_width, $row->fa_height )->text();
1031                 $bytes = $this->msg( 'parentheses' )
1032                         ->plaintextParams( $this->msg( 'nbytes' )->numParams( $row->fa_size )->text() )
1033                         ->plain();
1034                 $data = htmlspecialchars( $data . ' ' . $bytes );
1035                 $comment = $this->getFileComment( $file );
1036
1037                 // Add show/hide deletion links if available
1038                 $canHide = $this->isAllowed( 'deleterevision' );
1039                 if ( $canHide || ( $file->getVisibility() && $this->isAllowed( 'deletedhistory' ) ) ) {
1040                         if ( !$file->userCan( File::DELETED_RESTRICTED, $user ) ) {
1041                                 // Revision was hidden from sysops
1042                                 $revdlink = Linker::revDeleteLinkDisabled( $canHide );
1043                         } else {
1044                                 $query = [
1045                                         'type' => 'filearchive',
1046                                         'target' => $this->mTargetObj->getPrefixedDBkey(),
1047                                         'ids' => $row->fa_id
1048                                 ];
1049                                 $revdlink = Linker::revDeleteLink( $query,
1050                                         $file->isDeleted( File::DELETED_RESTRICTED ), $canHide );
1051                         }
1052                 } else {
1053                         $revdlink = '';
1054                 }
1055
1056                 return "<li>$checkBox $revdlink $pageLink . . $userLink $data $comment</li>\n";
1057         }
1058
1059         /**
1060          * Fetch revision text link if it's available to all users
1061          *
1062          * @param Revision $rev
1063          * @param Title $titleObj
1064          * @param string $ts Timestamp
1065          * @return string
1066          */
1067         function getPageLink( $rev, $titleObj, $ts ) {
1068                 $user = $this->getUser();
1069                 $time = $this->getLanguage()->userTimeAndDate( $ts, $user );
1070
1071                 if ( !$rev->userCan( RevisionRecord::DELETED_TEXT, $user ) ) {
1072                         return '<span class="history-deleted">' . $time . '</span>';
1073                 }
1074
1075                 $link = $this->getLinkRenderer()->makeKnownLink(
1076                         $titleObj,
1077                         $time,
1078                         [],
1079                         [
1080                                 'target' => $this->mTargetObj->getPrefixedText(),
1081                                 'timestamp' => $ts
1082                         ]
1083                 );
1084
1085                 if ( $rev->isDeleted( RevisionRecord::DELETED_TEXT ) ) {
1086                         $link = '<span class="history-deleted">' . $link . '</span>';
1087                 }
1088
1089                 return $link;
1090         }
1091
1092         /**
1093          * Fetch image view link if it's available to all users
1094          *
1095          * @param File|ArchivedFile $file
1096          * @param Title $titleObj
1097          * @param string $ts A timestamp
1098          * @param string $key A storage key
1099          *
1100          * @return string HTML fragment
1101          */
1102         function getFileLink( $file, $titleObj, $ts, $key ) {
1103                 $user = $this->getUser();
1104                 $time = $this->getLanguage()->userTimeAndDate( $ts, $user );
1105
1106                 if ( !$file->userCan( File::DELETED_FILE, $user ) ) {
1107                         return '<span class="history-deleted">' . htmlspecialchars( $time ) . '</span>';
1108                 }
1109
1110                 $link = $this->getLinkRenderer()->makeKnownLink(
1111                         $titleObj,
1112                         $time,
1113                         [],
1114                         [
1115                                 'target' => $this->mTargetObj->getPrefixedText(),
1116                                 'file' => $key,
1117                                 'token' => $user->getEditToken( $key )
1118                         ]
1119                 );
1120
1121                 if ( $file->isDeleted( File::DELETED_FILE ) ) {
1122                         $link = '<span class="history-deleted">' . $link . '</span>';
1123                 }
1124
1125                 return $link;
1126         }
1127
1128         /**
1129          * Fetch file's user id if it's available to this user
1130          *
1131          * @param File|ArchivedFile $file
1132          * @return string HTML fragment
1133          */
1134         function getFileUser( $file ) {
1135                 if ( !$file->userCan( File::DELETED_USER, $this->getUser() ) ) {
1136                         return '<span class="history-deleted">' .
1137                                 $this->msg( 'rev-deleted-user' )->escaped() .
1138                                 '</span>';
1139                 }
1140
1141                 $link = Linker::userLink( $file->getRawUser(), $file->getRawUserText() ) .
1142                         Linker::userToolLinks( $file->getRawUser(), $file->getRawUserText() );
1143
1144                 if ( $file->isDeleted( File::DELETED_USER ) ) {
1145                         $link = '<span class="history-deleted">' . $link . '</span>';
1146                 }
1147
1148                 return $link;
1149         }
1150
1151         /**
1152          * Fetch file upload comment if it's available to this user
1153          *
1154          * @param File|ArchivedFile $file
1155          * @return string HTML fragment
1156          */
1157         function getFileComment( $file ) {
1158                 if ( !$file->userCan( File::DELETED_COMMENT, $this->getUser() ) ) {
1159                         return '<span class="history-deleted"><span class="comment">' .
1160                                 $this->msg( 'rev-deleted-comment' )->escaped() . '</span></span>';
1161                 }
1162
1163                 $link = Linker::commentBlock( $file->getRawDescription() );
1164
1165                 if ( $file->isDeleted( File::DELETED_COMMENT ) ) {
1166                         $link = '<span class="history-deleted">' . $link . '</span>';
1167                 }
1168
1169                 return $link;
1170         }
1171
1172         function undelete() {
1173                 if ( $this->getConfig()->get( 'UploadMaintenance' )
1174                         && $this->mTargetObj->getNamespace() == NS_FILE
1175                 ) {
1176                         throw new ErrorPageError( 'undelete-error', 'filedelete-maintenance' );
1177                 }
1178
1179                 $this->checkReadOnly();
1180
1181                 $out = $this->getOutput();
1182                 $archive = new PageArchive( $this->mTargetObj, $this->getConfig() );
1183                 Hooks::run( 'UndeleteForm::undelete', [ &$archive, $this->mTargetObj ] );
1184                 $ok = $archive->undelete(
1185                         $this->mTargetTimestamp,
1186                         $this->mComment,
1187                         $this->mFileVersions,
1188                         $this->mUnsuppress,
1189                         $this->getUser()
1190                 );
1191
1192                 if ( is_array( $ok ) ) {
1193                         if ( $ok[1] ) { // Undeleted file count
1194                                 Hooks::run( 'FileUndeleteComplete', [
1195                                         $this->mTargetObj, $this->mFileVersions,
1196                                         $this->getUser(), $this->mComment ] );
1197                         }
1198
1199                         $link = $this->getLinkRenderer()->makeKnownLink( $this->mTargetObj );
1200                         $out->addWikiMsg( 'undeletedpage', Message::rawParam( $link ) );
1201                 } else {
1202                         $out->setPageTitle( $this->msg( 'undelete-error' ) );
1203                 }
1204
1205                 // Show revision undeletion warnings and errors
1206                 $status = $archive->getRevisionStatus();
1207                 if ( $status && !$status->isGood() ) {
1208                         $out->wrapWikiTextAsInterface(
1209                                 'error',
1210                                 '<div id="mw-error-cannotundelete">' .
1211                                 $status->getWikiText(
1212                                         'cannotundelete',
1213                                         'cannotundelete'
1214                                 ) . '</div>'
1215                         );
1216                 }
1217
1218                 // Show file undeletion warnings and errors
1219                 $status = $archive->getFileStatus();
1220                 if ( $status && !$status->isGood() ) {
1221                         $out->wrapWikiTextAsInterface(
1222                                 'error',
1223                                 $status->getWikiText(
1224                                         'undelete-error-short',
1225                                         'undelete-error-long'
1226                                 )
1227                         );
1228                 }
1229         }
1230
1231         /**
1232          * Return an array of subpages beginning with $search that this special page will accept.
1233          *
1234          * @param string $search Prefix to search for
1235          * @param int $limit Maximum number of results to return (usually 10)
1236          * @param int $offset Number of results to skip (usually 0)
1237          * @return string[] Matching subpages
1238          */
1239         public function prefixSearchSubpages( $search, $limit, $offset ) {
1240                 return $this->prefixSearchString( $search, $limit, $offset );
1241         }
1242
1243         protected function getGroupName() {
1244                 return 'pagetools';
1245         }
1246 }