includes/SpecialUndelete.php

   1 <?php
   2
   3 /**
   4  * Special page allowing users with the appropriate permissions to view
   5  * and restore deleted content
   6  *
   7  * @package MediaWiki
   8  * @subpackage Special pages
   9  */
  10
  11 /**
  12  *
  13  */
  14 function wfSpecialUndelete( $par ) {
  15     global $wgRequest;
  16
  17         $form = new UndeleteForm( $wgRequest, $par );
  18         $form->execute();
  19 }
  20
  21 /**
  22  *
  23  * @package MediaWiki
  24  * @subpackage SpecialPage
  25  */
  26 class PageArchive {
  27         var $title;
  28
  29         function PageArchive( &$title ) {
  30                 if( is_null( $title ) ) {
  31                         throw new MWException( 'Archiver() given a null title.');
  32                 }
  33                 $this->title =& $title;
  34         }
  35
  36         /**
  37          * List all deleted pages recorded in the archive table. Returns result
  38          * wrapper with (ar_namespace, ar_title, count) fields, ordered by page
  39          * namespace/title. Can be called staticaly.
  40          *
  41          * @return ResultWrapper
  42          */
  43         /* static */ function listAllPages() {
  44                 $dbr =& wfGetDB( DB_SLAVE );
  45                 $archive = $dbr->tableName( 'archive' );
  46
  47                 $sql = "SELECT ar_namespace,ar_title, COUNT(*) AS count FROM $archive " .
  48                   "GROUP BY ar_namespace,ar_title ORDER BY ar_namespace,ar_title";
  49
  50                 return $dbr->resultObject( $dbr->query( $sql, 'PageArchive::listAllPages' ) );
  51         }
  52
  53         /**
  54          * List the revisions of the given page. Returns result wrapper with
  55          * (ar_minor_edit, ar_timestamp, ar_user, ar_user_text, ar_comment) fields.
  56          *
  57          * @return ResultWrapper
  58          */
  59         function listRevisions() {
  60                 $dbr =& wfGetDB( DB_SLAVE );
  61                 $res = $dbr->select( 'archive',
  62                         array( 'ar_minor_edit', 'ar_timestamp', 'ar_user', 'ar_user_text', 'ar_comment' ),
  63                         array( 'ar_namespace' => $this->title->getNamespace(),
  64                                'ar_title' => $this->title->getDBkey() ),
  65                         'PageArchive::listRevisions',
  66                         array( 'ORDER BY' => 'ar_timestamp DESC' ) );
  67                 $ret = $dbr->resultObject( $res );
  68                 return $ret;
  69         }
  70
  71         /**
  72          * List the deleted file revisions for this page, if it's a file page.
  73          * Returns a result wrapper with various filearchive fields, or null
  74          * if not a file page.
  75          *
  76          * @return ResultWrapper
  77          * @fixme Does this belong in Image for fuller encapsulation?
  78          */
  79         function listFiles() {
  80                 if( $this->title->getNamespace() == NS_IMAGE ) {
  81                         $dbr =& wfGetDB( DB_SLAVE );
  82                         $res = $dbr->select( 'filearchive',
  83                                 array(
  84                                         'fa_id',
  85                                         'fa_name',
  86                                         'fa_storage_key',
  87                                         'fa_size',
  88                                         'fa_width',
  89                                         'fa_height',
  90                                         'fa_description',
  91                                         'fa_user',
  92                                         'fa_user_text',
  93                                         'fa_timestamp' ),
  94                                 array( 'fa_name' => $this->title->getDbKey() ),
  95                                 __METHOD__,
  96                                 array( 'ORDER BY' => 'fa_timestamp DESC' ) );
  97                         $ret = $dbr->resultObject( $res );
  98                         return $ret;
  99                 }
 100                 return null;
 101         }
 102
 103         /**
 104          * Fetch (and decompress if necessary) the stored text for the deleted
 105          * revision of the page with the given timestamp.
 106          *
 107          * @return string
 108          */
 109         function getRevisionText( $timestamp ) {
 110                 $dbr =& wfGetDB( DB_SLAVE );
 111                 $row = $dbr->selectRow( 'archive',
 112                         array( 'ar_text', 'ar_flags', 'ar_text_id' ),
 113                         array( 'ar_namespace' => $this->title->getNamespace(),
 114                                'ar_title' => $this->title->getDbkey(),
 115                                'ar_timestamp' => $dbr->timestamp( $timestamp ) ),
 116                         __METHOD__ );
 117                 if( $row ) {
 118                         return $this->getTextFromRow( $row );
 119                 } else {
 120                         return null;
 121                 }
 122         }
 123
 124         /**
 125          * Get the text from an archive row containing ar_text, ar_flags and ar_text_id
 126          */
 127         function getTextFromRow( $row ) {
 128                 if( is_null( $row->ar_text_id ) ) {
 129                         // An old row from MediaWiki 1.4 or previous.
 130                         // Text is embedded in this row in classic compression format.
 131                         return Revision::getRevisionText( $row, "ar_" );
 132                 } else {
 133                         // New-style: keyed to the text storage backend.
 134                         $dbr =& wfGetDB( DB_SLAVE );
 135                         $text = $dbr->selectRow( 'text',
 136                                 array( 'old_text', 'old_flags' ),
 137                                 array( 'old_id' => $row->ar_text_id ),
 138                                 __METHOD__ );
 139                         return Revision::getRevisionText( $text );
 140                 }
 141         }
 142
 143
 144         /**
 145          * Fetch (and decompress if necessary) the stored text of the most
 146          * recently edited deleted revision of the page.
 147          *
 148          * If there are no archived revisions for the page, returns NULL.
 149          *
 150          * @return string
 151          */
 152         function getLastRevisionText() {
 153                 $dbr =& wfGetDB( DB_SLAVE );
 154                 $row = $dbr->selectRow( 'archive',
 155                         array( 'ar_text', 'ar_flags', 'ar_text_id' ),
 156                         array( 'ar_namespace' => $this->title->getNamespace(),
 157                                'ar_title' => $this->title->getDBkey() ),
 158                         'PageArchive::getLastRevisionText',
 159                         array( 'ORDER BY' => 'ar_timestamp DESC' ) );
 160                 if( $row ) {
 161                         return $this->getTextFromRow( $row );
 162                 } else {
 163                         return NULL;
 164                 }
 165         }
 166
 167         /**
 168          * Quick check if any archived revisions are present for the page.
 169          * @return bool
 170          */
 171         function isDeleted() {
 172                 $dbr =& wfGetDB( DB_SLAVE );
 173                 $n = $dbr->selectField( 'archive', 'COUNT(ar_title)',
 174                         array( 'ar_namespace' => $this->title->getNamespace(),
 175                                'ar_title' => $this->title->getDBkey() ) );
 176                 return ($n > 0);
 177         }
 178
 179         /**
 180          * Restore the given (or all) text and file revisions for the page.
 181          * Once restored, the items will be removed from the archive tables.
 182          * The deletion log will be updated with an undeletion notice.
 183          *
 184          * @param array $timestamps Pass an empty array to restore all revisions, otherwise list the ones to undelete.
 185          * @param string $comment
 186          * @param array $fileVersions
 187          *
 188          * @return true on success.
 189          */
 190         function undelete( $timestamps, $comment = '', $fileVersions = array() ) {
 191                 // If both the set of text revisions and file revisions are empty,
 192                 // restore everything. Otherwise, just restore the requested items.
 193                 $restoreAll = empty( $timestamps ) && empty( $fileVersions );
 194
 195                 $restoreText = $restoreAll || !empty( $timestamps );
 196                 $restoreFiles = $restoreAll || !empty( $fileVersions );
 197
 198                 if( $restoreFiles && $this->title->getNamespace() == NS_IMAGE ) {
 199                         $img = new Image( $this->title );
 200                         $filesRestored = $img->restore( $fileVersions );
 201                 } else {
 202                         $filesRestored = 0;
 203                 }
 204
 205                 if( $restoreText ) {
 206                         $textRestored = $this->undeleteRevisions( $timestamps );
 207                 } else {
 208                         $textRestored = 0;
 209                 }
 210
 211                 // Touch the log!
 212                 global $wgContLang;
 213                 $log = new LogPage( 'delete' );
 214
 215                 if( $textRestored && $filesRestored ) {
 216                         $reason = wfMsgForContent( 'undeletedrevisions-files',
 217                                 $wgContLang->formatNum( $textRestored ),
 218                                 $wgContLang->formatNum( $filesRestored ) );
 219                 } elseif( $textRestored ) {
 220                         $reason = wfMsgForContent( 'undeletedrevisions',
 221                                 $wgContLang->formatNum( $textRestored ) );
 222                 } elseif( $filesRestored ) {
 223                         $reason = wfMsgForContent( 'undeletedfiles',
 224                                 $wgContLang->formatNum( $filesRestored ) );
 225                 } else {
 226                         wfDebug( "Undelete: nothing undeleted...\n" );
 227                         return false;
 228                 }
 229
 230                 if( trim( $comment ) != '' )
 231                         $reason .= ": {$comment}";
 232                 $log->addEntry( 'restore', $this->title, $reason );
 233
 234                 return true;
 235         }
 236
 237         /**
 238          * This is the meaty bit -- restores archived revisions of the given page
 239          * to the cur/old tables. If the page currently exists, all revisions will
 240          * be stuffed into old, otherwise the most recent will go into cur.
 241          *
 242          * @param array $timestamps Pass an empty array to restore all revisions, otherwise list the ones to undelete.
 243          * @param string $comment
 244          * @param array $fileVersions
 245          *
 246          * @return int number of revisions restored
 247          */
 248         private function undeleteRevisions( $timestamps ) {
 249                 global $wgParser, $wgDBtype;
 250
 251                 $restoreAll = empty( $timestamps );
 252
 253                 $dbw =& wfGetDB( DB_MASTER );
 254                 extract( $dbw->tableNames( 'page', 'archive' ) );
 255
 256                 # Does this page already exist? We'll have to update it...
 257                 $article = new Article( $this->title );
 258                 $options = ( $wgDBtype == 'postgres' )
 259                         ? '' // pg doesn't support this?
 260                         : 'FOR UPDATE';
 261                 $page = $dbw->selectRow( 'page',
 262                         array( 'page_id', 'page_latest' ),
 263                         array( 'page_namespace' => $this->title->getNamespace(),
 264                                'page_title'     => $this->title->getDBkey() ),
 265                         __METHOD__,
 266                         $options );
 267                 if( $page ) {
 268                         # Page already exists. Import the history, and if necessary
 269                         # we'll update the latest revision field in the record.
 270                         $newid             = 0;
 271                         $pageId            = $page->page_id;
 272                         $previousRevId     = $page->page_latest;
 273                 } else {
 274                         # Have to create a new article...
 275                         $newid  = $article->insertOn( $dbw );
 276                         $pageId = $newid;
 277                         $previousRevId = 0;
 278                 }
 279
 280                 if( $restoreAll ) {
 281                         $oldones = '1 = 1'; # All revisions...
 282                 } else {
 283                         $oldts = implode( ',',
 284                                 array_map( array( &$dbw, 'addQuotes' ),
 285                                         array_map( array( &$dbw, 'timestamp' ),
 286                                                 $timestamps ) ) );
 287
 288                         $oldones = "ar_timestamp IN ( {$oldts} )";
 289                 }
 290
 291                 /**
 292                  * Restore each revision...
 293                  */
 294                 $result = $dbw->select( 'archive',
 295                         /* fields */ array(
 296                                 'ar_rev_id',
 297                                 'ar_text',
 298                                 'ar_comment',
 299                                 'ar_user',
 300                                 'ar_user_text',
 301                                 'ar_timestamp',
 302                                 'ar_minor_edit',
 303                                 'ar_flags',
 304                                 'ar_text_id' ),
 305                         /* WHERE */ array(
 306                                 'ar_namespace' => $this->title->getNamespace(),
 307                                 'ar_title'     => $this->title->getDBkey(),
 308                                 $oldones ),
 309                         __METHOD__,
 310                         /* options */ array(
 311                                 'ORDER BY' => 'ar_timestamp' )
 312                         );
 313                 if( $dbw->numRows( $result ) < count( $timestamps ) ) {
 314                         wfDebug( __METHOD__.": couldn't find all requested rows\n" );
 315                         return false;
 316                 }
 317
 318                 $revision = null;
 319                 $newRevId = $previousRevId;
 320                 $restored = 0;
 321
 322                 while( $row = $dbw->fetchObject( $result ) ) {
 323                         if( $row->ar_text_id ) {
 324                                 // Revision was deleted in 1.5+; text is in
 325                                 // the regular text table, use the reference.
 326                                 // Specify null here so the so the text is
 327                                 // dereferenced for page length info if needed.
 328                                 $revText = null;
 329                         } else {
 330                                 // Revision was deleted in 1.4 or earlier.
 331                                 // Text is squashed into the archive row, and
 332                                 // a new text table entry will be created for it.
 333                                 $revText = Revision::getRevisionText( $row, 'ar_' );
 334                         }
 335                         $revision = new Revision( array(
 336                                 'page'       => $pageId,
 337                                 'id'         => $row->ar_rev_id,
 338                                 'text'       => $revText,
 339                                 'comment'    => $row->ar_comment,
 340                                 'user'       => $row->ar_user,
 341                                 'user_text'  => $row->ar_user_text,
 342                                 'timestamp'  => $row->ar_timestamp,
 343                                 'minor_edit' => $row->ar_minor_edit,
 344                                 'text_id'    => $row->ar_text_id,
 345                                 ) );
 346                         $newRevId = $revision->insertOn( $dbw );
 347                         $restored++;
 348                 }
 349
 350                 if( $revision ) {
 351                         # FIXME: Update latest if newer as well...
 352                         if( $newid ) {
 353                                 // Attach the latest revision to the page...
 354                                 $article->updateRevisionOn( $dbw, $revision, $previousRevId );
 355
 356                                 // Update site stats, link tables, etc
 357                                 $article->createUpdates( $revision );
 358                         }
 359
 360                         if( $newid ) {
 361                                 Article::onArticleCreate( $this->title );
 362                         } else {
 363                                 Article::onArticleEdit( $this->title );
 364                         }
 365                 } else {
 366                         # Something went terribly wrong!
 367                 }
 368
 369                 # Now that it's safely stored, take it out of the archive
 370                 $dbw->delete( 'archive',
 371                         /* WHERE */ array(
 372                                 'ar_namespace' => $this->title->getNamespace(),
 373                                 'ar_title' => $this->title->getDBkey(),
 374                                 $oldones ),
 375                         __METHOD__ );
 376
 377                 return $restored;
 378         }
 379
 380 }
 381
 382 /**
 383  *
 384  * @package MediaWiki
 385  * @subpackage SpecialPage
 386  */
 387 class UndeleteForm {
 388         var $mAction, $mTarget, $mTimestamp, $mRestore, $mTargetObj;
 389         var $mTargetTimestamp, $mAllowed, $mComment;
 390
 391         function UndeleteForm( &$request, $par = "" ) {
 392                 global $wgUser;
 393                 $this->mAction = $request->getVal( 'action' );
 394                 $this->mTarget = $request->getVal( 'target' );
 395                 $time = $request->getVal( 'timestamp' );
 396                 $this->mTimestamp = $time ? wfTimestamp( TS_MW, $time ) : '';
 397                 $this->mFile = $request->getVal( 'file' );
 398
 399                 $posted = $request->wasPosted() &&
 400                         $wgUser->matchEditToken( $request->getVal( 'wpEditToken' ) );
 401                 $this->mRestore = $request->getCheck( 'restore' ) && $posted;
 402                 $this->mPreview = $request->getCheck( 'preview' ) && $posted;
 403                 $this->mComment = $request->getText( 'wpComment' );
 404
 405                 if( $par != "" ) {
 406                         $this->mTarget = $par;
 407                 }
 408                 if ( $wgUser->isAllowed( 'delete' ) && !$wgUser->isBlocked() ) {
 409                         $this->mAllowed = true;
 410                 } else {
 411                         $this->mAllowed = false;
 412                         $this->mTimestamp = '';
 413                         $this->mRestore = false;
 414                 }
 415                 if ( $this->mTarget !== "" ) {
 416                         $this->mTargetObj = Title::newFromURL( $this->mTarget );
 417                 } else {
 418                         $this->mTargetObj = NULL;
 419                 }
 420                 if( $this->mRestore ) {
 421                         $timestamps = array();
 422                         $this->mFileVersions = array();
 423                         foreach( $_REQUEST as $key => $val ) {
 424                                 if( preg_match( '/^ts(\d{14})$/', $key, $matches ) ) {
 425                                         array_push( $timestamps, $matches[1] );
 426                                 }
 427
 428                                 if( preg_match( '/^fileid(\d+)$/', $key, $matches ) ) {
 429                                         $this->mFileVersions[] = intval( $matches[1] );
 430                                 }
 431                         }
 432                         rsort( $timestamps );
 433                         $this->mTargetTimestamp = $timestamps;
 434                 }
 435         }
 436
 437         function execute() {
 438
 439                 if( is_null( $this->mTargetObj ) ) {
 440                         return $this->showList();
 441                 }
 442                 if( $this->mTimestamp !== '' ) {
 443                         return $this->showRevision( $this->mTimestamp );
 444                 }
 445                 if( $this->mFile !== null ) {
 446                         return $this->showFile( $this->mFile );
 447                 }
 448                 if( $this->mRestore && $this->mAction == "submit" ) {
 449                         return $this->undelete();
 450                 }
 451                 return $this->showHistory();
 452         }
 453
 454         /* private */ function showList() {
 455                 global $wgLang, $wgContLang, $wgUser, $wgOut;
 456
 457                 # List undeletable articles
 458                 $result = PageArchive::listAllPages();
 459
 460                 if ( $this->mAllowed ) {
 461                         $wgOut->setPagetitle( wfMsg( "undeletepage" ) );
 462                 } else {
 463                         $wgOut->setPagetitle( wfMsg( "viewdeletedpage" ) );
 464                 }
 465                 $wgOut->addWikiText( wfMsg( "undeletepagetext" ) );
 466
 467                 $sk = $wgUser->getSkin();
 468                 $undelete =& Title::makeTitle( NS_SPECIAL, 'Undelete' );
 469                 $wgOut->addHTML( "<ul>\n" );
 470                 while( $row = $result->fetchObject() ) {
 471                         $title = Title::makeTitleSafe( $row->ar_namespace, $row->ar_title );
 472                         $link = $sk->makeKnownLinkObj( $undelete, htmlspecialchars( $title->getPrefixedText() ), 'target=' . $title->getPrefixedUrl() );
 473                         $revs = wfMsgHtml( 'undeleterevisions', $wgLang->formatNum( $row->count ) );
 474                         $wgOut->addHtml( "<li>{$link} ({$revs})</li>\n" );
 475                 }
 476                 $result->free();
 477                 $wgOut->addHTML( "</ul>\n" );
 478
 479                 return true;
 480         }
 481
 482         /* private */ function showRevision( $timestamp ) {
 483                 global $wgLang, $wgUser, $wgOut;
 484
 485                 if(!preg_match("/[0-9]{14}/",$timestamp)) return 0;
 486
 487                 $archive = new PageArchive( $this->mTargetObj );
 488                 $text = $archive->getRevisionText( $timestamp );
 489
 490                 $wgOut->setPagetitle( wfMsg( "undeletepage" ) );
 491                 $wgOut->addWikiText( "(" . wfMsg( "undeleterevision",
 492                         $wgLang->date( $timestamp ) ) . ")\n" );
 493
 494                 if( $this->mPreview ) {
 495                         $wgOut->addHtml( "<hr />\n" );
 496                         $wgOut->addWikiText( $text );
 497                 }
 498
 499                 $self = Title::makeTitle( NS_SPECIAL, "Undelete" );
 500
 501                 $wgOut->addHtml(
 502                         wfElement( 'textarea', array(
 503                                         'readonly' => true,
 504                                         'cols' => intval( $wgUser->getOption( 'cols' ) ),
 505                                         'rows' => intval( $wgUser->getOption( 'rows' ) ) ),
 506                                 $text . "\n" ) .
 507                         wfOpenElement( 'div' ) .
 508                         wfOpenElement( 'form', array(
 509                                 'method' => 'post',
 510                                 'action' => $self->getLocalURL( "action=submit" ) ) ) .
 511                         wfElement( 'input', array(
 512                                 'type' => 'hidden',
 513                                 'name' => 'target',
 514                                 'value' => $this->mTargetObj->getPrefixedDbKey() ) ) .
 515                         wfElement( 'input', array(
 516                                 'type' => 'hidden',
 517                                 'name' => 'timestamp',
 518                                 'value' => $timestamp ) ) .
 519                         wfElement( 'input', array(
 520                                 'type' => 'hidden',
 521                                 'name' => 'wpEditToken',
 522                                 'value' => $wgUser->editToken() ) ) .
 523                         wfElement( 'input', array(
 524                                 'type' => 'hidden',
 525                                 'name' => 'preview',
 526                                 'value' => '1' ) ) .
 527                         wfElement( 'input', array(
 528                                 'type' => 'submit',
 529                                 'value' => wfMsg( 'showpreview' ) ) ) .
 530                         wfCloseElement( 'form' ) .
 531                         wfCloseElement( 'div' ) );
 532         }
 533
 534         /**
 535          * Show a deleted file version requested by the visitor.
 536          */
 537         function showFile( $key ) {
 538                 global $wgOut;
 539                 $wgOut->disable();
 540
 541                 $store = FileStore::get( 'deleted' );
 542                 $store->stream( $key );
 543         }
 544
 545         /* private */ function showHistory() {
 546                 global $wgLang, $wgUser, $wgOut;
 547
 548                 $sk = $wgUser->getSkin();
 549                 if ( $this->mAllowed ) {
 550                         $wgOut->setPagetitle( wfMsg( "undeletepage" ) );
 551                 } else {
 552                         $wgOut->setPagetitle( wfMsg( 'viewdeletedpage' ) );
 553                 }
 554
 555                 $archive = new PageArchive( $this->mTargetObj );
 556                 $text = $archive->getLastRevisionText();
 557                 /*
 558                 if( is_null( $text ) ) {
 559                         $wgOut->addWikiText( wfMsg( "nohistory" ) );
 560                         return;
 561                 }
 562                 */
 563                 if ( $this->mAllowed ) {
 564                         $wgOut->addWikiText( wfMsg( "undeletehistory" ) );
 565                 } else {
 566                         $wgOut->addWikiText( wfMsg( "undeletehistorynoadmin" ) );
 567                 }
 568
 569                 # List all stored revisions
 570                 $revisions = $archive->listRevisions();
 571                 $files = $archive->listFiles();
 572
 573                 $haveRevisions = $revisions && $revisions->numRows() > 0;
 574                 $haveFiles = $files && $files->numRows() > 0;
 575
 576                 # Batch existence check on user and talk pages
 577                 if( $haveRevisions ) {
 578                         $batch = new LinkBatch();
 579                         while( $row = $revisions->fetchObject() ) {
 580                                 $batch->addObj( Title::makeTitleSafe( NS_USER, $row->ar_user_text ) );
 581                                 $batch->addObj( Title::makeTitleSafe( NS_USER_TALK, $row->ar_user_text ) );
 582                         }
 583                         $batch->execute();
 584                         $revisions->seek( 0 );
 585                 }
 586                 if( $haveFiles ) {
 587                         $batch = new LinkBatch();
 588                         while( $row = $files->fetchObject() ) {
 589                                 $batch->addObj( Title::makeTitleSafe( NS_USER, $row->fa_user_text ) );
 590                                 $batch->addObj( Title::makeTitleSafe( NS_USER_TALK, $row->fa_user_text ) );
 591                         }
 592                         $batch->execute();
 593                         $files->seek( 0 );
 594                 }
 595
 596                 if ( $this->mAllowed ) {
 597                         $titleObj = Title::makeTitle( NS_SPECIAL, "Undelete" );
 598                         $action = $titleObj->getLocalURL( "action=submit" );
 599                         # Start the form here
 600                         $top = wfOpenElement( 'form', array( 'method' => 'post', 'action' => $action, 'id' => 'undelete' ) );
 601                         $wgOut->addHtml( $top );
 602                 }
 603
 604                 # Show relevant lines from the deletion log:
 605                 $wgOut->addHTML( "<h2>" . htmlspecialchars( LogPage::logName( 'delete' ) ) . "</h2>\n" );
 606                 $logViewer = new LogViewer(
 607                         new LogReader(
 608                                 new FauxRequest(
 609                                         array( 'page' => $this->mTargetObj->getPrefixedText(),
 610                                                    'type' => 'delete' ) ) ) );
 611                 $logViewer->showList( $wgOut );
 612
 613                 if( $this->mAllowed && ( $haveRevisions || $haveFiles ) ) {
 614                         # Format the user-visible controls (comment field, submission button)
 615                         # in a nice little table
 616                         $table = '<fieldset><table><tr>';
 617                         $table .= '<td colspan="2">' . wfMsgWikiHtml( 'undeleteextrahelp' ) . '</td></tr><tr>';
 618                         $table .= '<td align="right"><strong>' . wfMsgHtml( 'undeletecomment' ) . '</strong></td>';
 619                         $table .= '<td>' . wfInput( 'wpComment', 50, $this->mComment ) . '</td>';
 620                         $table .= '</tr><tr><td>&nbsp;</td><td>';
 621                         $table .= wfSubmitButton( wfMsg( 'undeletebtn' ), array( 'name' => 'restore' ) );
 622                         $table .= wfElement( 'input', array( 'type' => 'reset', 'value' => wfMsg( 'undeletereset' ) ) );
 623                         $table .= '</td></tr></table></fieldset>';
 624                         $wgOut->addHtml( $table );
 625                 }
 626
 627                 $wgOut->addHTML( "<h2>" . htmlspecialchars( wfMsg( "history" ) ) . "</h2>\n" );
 628
 629                 if( $haveRevisions ) {
 630                         # The page's stored (deleted) history:
 631                         $wgOut->addHTML("<ul>");
 632                         $target = urlencode( $this->mTarget );
 633                         while( $row = $revisions->fetchObject() ) {
 634                                 $ts = wfTimestamp( TS_MW, $row->ar_timestamp );
 635                                 if ( $this->mAllowed ) {
 636                                         $checkBox = wfCheck( "ts$ts" );
 637                                         $pageLink = $sk->makeKnownLinkObj( $titleObj,
 638                                                 $wgLang->timeanddate( $ts, true ),
 639                                                 "target=$target&timestamp=$ts" );
 640                                 } else {
 641                                         $checkBox = '';
 642                                         $pageLink = $wgLang->timeanddate( $ts, true );
 643                                 }
 644                                 $userLink = $sk->userLink( $row->ar_user, $row->ar_user_text ) . $sk->userToolLinks( $row->ar_user, $row->ar_user_text );
 645                                 $comment = $sk->commentBlock( $row->ar_comment );
 646                                 $wgOut->addHTML( "<li>$checkBox $pageLink . . $userLink $comment</li>\n" );
 647
 648                         }
 649                         $revisions->free();
 650                         $wgOut->addHTML("</ul>");
 651                 } else {
 652                         $wgOut->addWikiText( wfMsg( "nohistory" ) );
 653                 }
 654
 655
 656                 if( $haveFiles ) {
 657                         $wgOut->addHtml( "<h2>" . wfMsgHtml( 'imghistory' ) . "</h2>\n" );
 658                         $wgOut->addHtml( "<ul>" );
 659                         while( $row = $files->fetchObject() ) {
 660                                 $ts = wfTimestamp( TS_MW, $row->fa_timestamp );
 661                                 if ( $this->mAllowed && $row->fa_storage_key ) {
 662                                         $checkBox = wfCheck( "fileid" . $row->fa_id );
 663                                         $key = urlencode( $row->fa_storage_key );
 664                                         $target = urlencode( $this->mTarget );
 665                                         $pageLink = $sk->makeKnownLinkObj( $titleObj,
 666                                                 $wgLang->timeanddate( $ts, true ),
 667                                                 "target=$target&file=$key" );
 668                                 } else {
 669                                         $checkBox = '';
 670                                         $pageLink = $wgLang->timeanddate( $ts, true );
 671                                 }
 672                                 $userLink = $sk->userLink( $row->fa_user, $row->fa_user_text ) . $sk->userToolLinks( $row->fa_user, $row->fa_user_text );
 673                                 $data =
 674                                         wfMsgHtml( 'widthheight',
 675                                                 $wgLang->formatNum( $row->fa_width ),
 676                                                 $wgLang->formatNum( $row->fa_height ) ) .
 677                                         ' (' .
 678                                         wfMsgHtml( 'nbytes', $wgLang->formatNum( $row->fa_size ) ) .
 679                                         ')';
 680                                 $comment = $sk->commentBlock( $row->fa_description );
 681                                 $wgOut->addHTML( "<li>$checkBox $pageLink . . $userLink $data $comment</li>\n" );
 682                         }
 683                         $files->free();
 684                         $wgOut->addHTML( "</ul>" );
 685                 }
 686
 687                 if ( $this->mAllowed ) {
 688                         # Slip in the hidden controls here
 689                         $misc  = wfHidden( 'target', $this->mTarget );
 690                         $misc .= wfHidden( 'wpEditToken', $wgUser->editToken() );
 691                         $wgOut->addHtml( $misc . '</form>' );
 692                 }
 693
 694                 return true;
 695         }
 696
 697         function undelete() {
 698                 global $wgOut, $wgUser;
 699                 if( !is_null( $this->mTargetObj ) ) {
 700                         $archive = new PageArchive( $this->mTargetObj );
 701                         $ok = true;
 702
 703                         $ok = $archive->undelete(
 704                                 $this->mTargetTimestamp,
 705                                 $this->mComment,
 706                                 $this->mFileVersions );
 707
 708                         if( $ok ) {
 709                                 $skin =& $wgUser->getSkin();
 710                                 $link = $skin->makeKnownLinkObj( $this->mTargetObj );
 711                                 $wgOut->addHtml( wfMsgWikiHtml( 'undeletedpage', $link ) );
 712                                 return true;
 713                         }
 714                 }
 715                 $wgOut->showFatalError( wfMsg( "cannotundelete" ) );
 716                 return false;
 717         }
 718 }
 719
 720 ?>