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                 $fname = __CLASS__ . '::' . __FUNCTION__;
  81                 if( $this->title->getNamespace() == NS_IMAGE ) {
  82                         $dbr =& wfGetDB( DB_SLAVE );
  83                         $res = $dbr->select( 'filearchive',
  84                                 array(
  85                                         'fa_id',
  86                                         'fa_name',
  87                                         'fa_storage_key',
  88                                         'fa_size',
  89                                         'fa_width',
  90                                         'fa_height',
  91                                         'fa_description',
  92                                         'fa_user',
  93                                         'fa_user_text',
  94                                         'fa_timestamp' ),
  95                                 array( 'fa_name' => $this->title->getDbKey() ),
  96                                 $fname,
  97                                 array( 'ORDER BY' => 'fa_timestamp DESC' ) );
  98                         $ret = $dbr->resultObject( $res );
  99                         return $ret;
 100                 }
 101                 return null;
 102         }
 103
 104         /**
 105          * Fetch (and decompress if necessary) the stored text for the deleted
 106          * revision of the page with the given timestamp.
 107          *
 108          * @return string
 109          */
 110         function getRevisionText( $timestamp ) {
 111                 $fname = 'PageArchive::getRevisionText';
 112                 $dbr =& wfGetDB( DB_SLAVE );
 113                 $row = $dbr->selectRow( 'archive',
 114                         array( 'ar_text', 'ar_flags', 'ar_text_id' ),
 115                         array( 'ar_namespace' => $this->title->getNamespace(),
 116                                'ar_title' => $this->title->getDbkey(),
 117                                'ar_timestamp' => $dbr->timestamp( $timestamp ) ),
 118                         $fname );
 119                 if( $row ) {
 120                         return $this->getTextFromRow( $row );
 121                 } else {
 122                         return null;
 123                 }
 124         }
 125
 126         /**
 127          * Get the text from an archive row containing ar_text, ar_flags and ar_text_id
 128          */
 129         function getTextFromRow( $row ) {
 130                 $fname = 'PageArchive::getTextFromRow';
 131
 132                 if( is_null( $row->ar_text_id ) ) {
 133                         // An old row from MediaWiki 1.4 or previous.
 134                         // Text is embedded in this row in classic compression format.
 135                         return Revision::getRevisionText( $row, "ar_" );
 136                 } else {
 137                         // New-style: keyed to the text storage backend.
 138                         $dbr =& wfGetDB( DB_SLAVE );
 139                         $text = $dbr->selectRow( 'text',
 140                                 array( 'old_text', 'old_flags' ),
 141                                 array( 'old_id' => $row->ar_text_id ),
 142                                 $fname );
 143                         return Revision::getRevisionText( $text );
 144                 }
 145         }
 146
 147
 148         /**
 149          * Fetch (and decompress if necessary) the stored text of the most
 150          * recently edited deleted revision of the page.
 151          *
 152          * If there are no archived revisions for the page, returns NULL.
 153          *
 154          * @return string
 155          */
 156         function getLastRevisionText() {
 157                 $dbr =& wfGetDB( DB_SLAVE );
 158                 $row = $dbr->selectRow( 'archive',
 159                         array( 'ar_text', 'ar_flags', 'ar_text_id' ),
 160                         array( 'ar_namespace' => $this->title->getNamespace(),
 161                                'ar_title' => $this->title->getDBkey() ),
 162                         'PageArchive::getLastRevisionText',
 163                         array( 'ORDER BY' => 'ar_timestamp DESC' ) );
 164                 if( $row ) {
 165                         return $this->getTextFromRow( $row );
 166                 } else {
 167                         return NULL;
 168                 }
 169         }
 170
 171         /**
 172          * Quick check if any archived revisions are present for the page.
 173          * @return bool
 174          */
 175         function isDeleted() {
 176                 $dbr =& wfGetDB( DB_SLAVE );
 177                 $n = $dbr->selectField( 'archive', 'COUNT(ar_title)',
 178                         array( 'ar_namespace' => $this->title->getNamespace(),
 179                                'ar_title' => $this->title->getDBkey() ) );
 180                 return ($n > 0);
 181         }
 182
 183         /**
 184          * Restore the given (or all) text and file revisions for the page.
 185          * Once restored, the items will be removed from the archive tables.
 186          * The deletion log will be updated with an undeletion notice.
 187          *
 188          * @param array $timestamps Pass an empty array to restore all revisions, otherwise list the ones to undelete.
 189          * @param string $comment
 190          * @param array $fileVersions
 191          *
 192          * @return true on success.
 193          */
 194         function undelete( $timestamps, $comment = '', $fileVersions = array() ) {
 195                 // If both the set of text revisions and file revisions are empty,
 196                 // restore everything. Otherwise, just restore the requested items.
 197                 $restoreAll = empty( $timestamps ) && empty( $fileVersions );
 198
 199                 $restoreText = $restoreAll || !empty( $timestamps );
 200                 $restoreFiles = $restoreAll || !empty( $fileVersions );
 201
 202                 if( $restoreFiles && $this->title->getNamespace() == NS_IMAGE ) {
 203                         $img = new Image( $this->title );
 204                         $filesRestored = $img->restore( $fileVersions );
 205                 } else {
 206                         $filesRestored = 0;
 207                 }
 208
 209                 if( $restoreText ) {
 210                         $textRestored = $this->undeleteRevisions( $timestamps );
 211                 } else {
 212                         $textRestored = 0;
 213                 }
 214
 215                 // Touch the log!
 216                 global $wgContLang;
 217                 $log = new LogPage( 'delete' );
 218
 219                 if( $textRestored && $filesRestored ) {
 220                         $reason = wfMsgForContent( 'undeletedrevisions-files',
 221                                 $wgContLang->formatNum( $textRestored ),
 222                                 $wgContLang->formatNum( $filesRestored ) );
 223                 } elseif( $textRestored ) {
 224                         $reason = wfMsgForContent( 'undeletedrevisions',
 225                                 $wgContLang->formatNum( $textRestored ) );
 226                 } elseif( $filesRestored ) {
 227                         $reason = wfMsgForContent( 'undeletedfiles',
 228                                 $wgContLang->formatNum( $filesRestored ) );
 229                 } else {
 230                         wfDebug( "Undelete: nothing undeleted...\n" );
 231                         return false;
 232                 }
 233
 234                 if( trim( $comment ) != '' )
 235                         $reason .= ": {$comment}";
 236                 $log->addEntry( 'restore', $this->title, $reason );
 237
 238                 return true;
 239         }
 240
 241         /**
 242          * This is the meaty bit -- restores archived revisions of the given page
 243          * to the cur/old tables. If the page currently exists, all revisions will
 244          * be stuffed into old, otherwise the most recent will go into cur.
 245          *
 246          * @param array $timestamps Pass an empty array to restore all revisions, otherwise list the ones to undelete.
 247          * @param string $comment
 248          * @param array $fileVersions
 249          *
 250          * @return int number of revisions restored
 251          */
 252         private function undeleteRevisions( $timestamps ) {
 253                 global $wgParser, $wgDBtype;
 254
 255                 $fname = __CLASS__ . '::' . __FUNCTION__;
 256                 $restoreAll = empty( $timestamps );
 257
 258                 $dbw =& wfGetDB( DB_MASTER );
 259                 extract( $dbw->tableNames( 'page', 'archive' ) );
 260
 261                 # Does this page already exist? We'll have to update it...
 262                 $article = new Article( $this->title );
 263                 $options = ( $wgDBtype == 'postgres' )
 264                         ? '' // pg doesn't support this?
 265                         : 'FOR UPDATE';
 266                 $page = $dbw->selectRow( 'page',
 267                         array( 'page_id', 'page_latest' ),
 268                         array( 'page_namespace' => $this->title->getNamespace(),
 269                                'page_title'     => $this->title->getDBkey() ),
 270                         $fname,
 271                         $options );
 272                 if( $page ) {
 273                         # Page already exists. Import the history, and if necessary
 274                         # we'll update the latest revision field in the record.
 275                         $newid             = 0;
 276                         $pageId            = $page->page_id;
 277                         $previousRevId     = $page->page_latest;
 278                 } else {
 279                         # Have to create a new article...
 280                         $newid  = $article->insertOn( $dbw );
 281                         $pageId = $newid;
 282                         $previousRevId = 0;
 283                 }
 284
 285                 if( $restoreAll ) {
 286                         $oldones = '1 = 1'; # All revisions...
 287                 } else {
 288                         $oldts = implode( ',',
 289                                 array_map( array( &$dbw, 'addQuotes' ),
 290                                         array_map( array( &$dbw, 'timestamp' ),
 291                                                 $timestamps ) ) );
 292
 293                         $oldones = "ar_timestamp IN ( {$oldts} )";
 294                 }
 295
 296                 /**
 297                  * Restore each revision...
 298                  */
 299                 $result = $dbw->select( 'archive',
 300                         /* fields */ array(
 301                                 'ar_rev_id',
 302                                 'ar_text',
 303                                 'ar_comment',
 304                                 'ar_user',
 305                                 'ar_user_text',
 306                                 'ar_timestamp',
 307                                 'ar_minor_edit',
 308                                 'ar_flags',
 309                                 'ar_text_id' ),
 310                         /* WHERE */ array(
 311                                 'ar_namespace' => $this->title->getNamespace(),
 312                                 'ar_title'     => $this->title->getDBkey(),
 313                                 $oldones ),
 314                         $fname,
 315                         /* options */ array(
 316                                 'ORDER BY' => 'ar_timestamp' )
 317                         );
 318                 if( $dbw->numRows( $result ) < count( $timestamps ) ) {
 319                         wfDebug( "$fname: couldn't find all requested rows\n" );
 320                         return false;
 321                 }
 322
 323                 $revision = null;
 324                 $newRevId = $previousRevId;
 325                 $restored = 0;
 326
 327                 while( $row = $dbw->fetchObject( $result ) ) {
 328                         if( $row->ar_text_id ) {
 329                                 // Revision was deleted in 1.5+; text is in
 330                                 // the regular text table, use the reference.
 331                                 // Specify null here so the so the text is
 332                                 // dereferenced for page length info if needed.
 333                                 $revText = null;
 334                         } else {
 335                                 // Revision was deleted in 1.4 or earlier.
 336                                 // Text is squashed into the archive row, and
 337                                 // a new text table entry will be created for it.
 338                                 $revText = Revision::getRevisionText( $row, 'ar_' );
 339                         }
 340                         $revision = new Revision( array(
 341                                 'page'       => $pageId,
 342                                 'id'         => $row->ar_rev_id,
 343                                 'text'       => $revText,
 344                                 'comment'    => $row->ar_comment,
 345                                 'user'       => $row->ar_user,
 346                                 'user_text'  => $row->ar_user_text,
 347                                 'timestamp'  => $row->ar_timestamp,
 348                                 'minor_edit' => $row->ar_minor_edit,
 349                                 'text_id'    => $row->ar_text_id,
 350                                 ) );
 351                         $newRevId = $revision->insertOn( $dbw );
 352                         $restored++;
 353                 }
 354
 355                 if( $revision ) {
 356                         # FIXME: Update latest if newer as well...
 357                         if( $newid ) {
 358                                 # FIXME: update article count if changed...
 359                                 $article->updateRevisionOn( $dbw, $revision, $previousRevId );
 360
 361                                 # Finally, clean up the link tables
 362                                 $options = new ParserOptions;
 363                                 $parserOutput = $wgParser->parse( $revision->getText(), $this->title, $options,
 364                                         true, true, $newRevId );
 365                                 $u = new LinksUpdate( $this->title, $parserOutput );
 366                                 $u->doUpdate();
 367
 368                                 #TODO: SearchUpdate, etc.
 369                         }
 370
 371                         if( $newid ) {
 372                                 Article::onArticleCreate( $this->title );
 373                         } else {
 374                                 Article::onArticleEdit( $this->title );
 375                         }
 376                 } else {
 377                         # Something went terribly wrong!
 378                 }
 379
 380                 # Now that it's safely stored, take it out of the archive
 381                 $dbw->delete( 'archive',
 382                         /* WHERE */ array(
 383                                 'ar_namespace' => $this->title->getNamespace(),
 384                                 'ar_title' => $this->title->getDBkey(),
 385                                 $oldones ),
 386                         $fname );
 387
 388                 return $restored;
 389         }
 390
 391 }
 392
 393 /**
 394  *
 395  * @package MediaWiki
 396  * @subpackage SpecialPage
 397  */
 398 class UndeleteForm {
 399         var $mAction, $mTarget, $mTimestamp, $mRestore, $mTargetObj;
 400         var $mTargetTimestamp, $mAllowed, $mComment;
 401
 402         function UndeleteForm( &$request, $par = "" ) {
 403                 global $wgUser;
 404                 $this->mAction = $request->getText( 'action' );
 405                 $this->mTarget = $request->getText( 'target' );
 406                 $this->mTimestamp = $request->getText( 'timestamp' );
 407                 $this->mFile = $request->getVal( 'file' );
 408
 409                 $posted = $request->wasPosted() &&
 410                         $wgUser->matchEditToken( $request->getVal( 'wpEditToken' ) );
 411                 $this->mRestore = $request->getCheck( 'restore' ) && $posted;
 412                 $this->mPreview = $request->getCheck( 'preview' ) && $posted;
 413                 $this->mComment = $request->getText( 'wpComment' );
 414
 415                 if( $par != "" ) {
 416                         $this->mTarget = $par;
 417                 }
 418                 if ( $wgUser->isAllowed( 'delete' ) && !$wgUser->isBlocked() ) {
 419                         $this->mAllowed = true;
 420                 } else {
 421                         $this->mAllowed = false;
 422                         $this->mTimestamp = '';
 423                         $this->mRestore = false;
 424                 }
 425                 if ( $this->mTarget !== "" ) {
 426                         $this->mTargetObj = Title::newFromURL( $this->mTarget );
 427                 } else {
 428                         $this->mTargetObj = NULL;
 429                 }
 430                 if( $this->mRestore ) {
 431                         $timestamps = array();
 432                         $this->mFileVersions = array();
 433                         foreach( $_REQUEST as $key => $val ) {
 434                                 if( preg_match( '/^ts(\d{14})$/', $key, $matches ) ) {
 435                                         array_push( $timestamps, $matches[1] );
 436                                 }
 437
 438                                 if( preg_match( '/^fileid(\d+)$/', $key, $matches ) ) {
 439                                         $this->mFileVersions[] = intval( $matches[1] );
 440                                 }
 441                         }
 442                         rsort( $timestamps );
 443                         $this->mTargetTimestamp = $timestamps;
 444                 }
 445         }
 446
 447         function execute() {
 448
 449                 if( is_null( $this->mTargetObj ) ) {
 450                         return $this->showList();
 451                 }
 452                 if( $this->mTimestamp !== '' ) {
 453                         return $this->showRevision( $this->mTimestamp );
 454                 }
 455                 if( $this->mFile !== null ) {
 456                         return $this->showFile( $this->mFile );
 457                 }
 458                 if( $this->mRestore && $this->mAction == "submit" ) {
 459                         return $this->undelete();
 460                 }
 461                 return $this->showHistory();
 462         }
 463
 464         /* private */ function showList() {
 465                 global $wgLang, $wgContLang, $wgUser, $wgOut;
 466                 $fname = "UndeleteForm::showList";
 467
 468                 # List undeletable articles
 469                 $result = PageArchive::listAllPages();
 470
 471                 if ( $this->mAllowed ) {
 472                         $wgOut->setPagetitle( wfMsg( "undeletepage" ) );
 473                 } else {
 474                         $wgOut->setPagetitle( wfMsg( "viewdeletedpage" ) );
 475                 }
 476                 $wgOut->addWikiText( wfMsg( "undeletepagetext" ) );
 477
 478                 $sk = $wgUser->getSkin();
 479                 $undelete =& Title::makeTitle( NS_SPECIAL, 'Undelete' );
 480                 $wgOut->addHTML( "<ul>\n" );
 481                 while( $row = $result->fetchObject() ) {
 482                         $n = ($row->ar_namespace ?
 483                                 ($wgContLang->getNsText( $row->ar_namespace ) . ":") : "").
 484                                 $row->ar_title;
 485                         $link = $sk->makeKnownLinkObj( $undelete,
 486                                 htmlspecialchars( $n ), "target=" . urlencode( $n ) );
 487                         $revisions = htmlspecialchars( wfMsg( "undeleterevisions",
 488                                 $wgLang->formatNum( $row->count ) ) );
 489                         $wgOut->addHTML( "<li>$link ($revisions)</li>\n" );
 490                 }
 491                 $result->free();
 492                 $wgOut->addHTML( "</ul>\n" );
 493
 494                 return true;
 495         }
 496
 497         /* private */ function showRevision( $timestamp ) {
 498                 global $wgLang, $wgUser, $wgOut;
 499                 $fname = "UndeleteForm::showRevision";
 500
 501                 if(!preg_match("/[0-9]{14}/",$timestamp)) return 0;
 502
 503                 $archive = new PageArchive( $this->mTargetObj );
 504                 $text = $archive->getRevisionText( $timestamp );
 505
 506                 $wgOut->setPagetitle( wfMsg( "undeletepage" ) );
 507                 $wgOut->addWikiText( "(" . wfMsg( "undeleterevision",
 508                         $wgLang->date( $timestamp ) ) . ")\n" );
 509
 510                 if( $this->mPreview ) {
 511                         $wgOut->addHtml( "<hr />\n" );
 512                         $wgOut->addWikiText( $text );
 513                 }
 514
 515                 $self = Title::makeTitle( NS_SPECIAL, "Undelete" );
 516
 517                 $wgOut->addHtml(
 518                         wfElement( 'textarea', array(
 519                                         'readonly' => true,
 520                                         'cols' => intval( $wgUser->getOption( 'cols' ) ),
 521                                         'rows' => intval( $wgUser->getOption( 'rows' ) ) ),
 522                                 $text . "\n" ) .
 523                         wfOpenElement( 'div' ) .
 524                         wfOpenElement( 'form', array(
 525                                 'method' => 'post',
 526                                 'action' => $self->getLocalURL( "action=submit" ) ) ) .
 527                         wfElement( 'input', array(
 528                                 'type' => 'hidden',
 529                                 'name' => 'target',
 530                                 'value' => $this->mTargetObj->getPrefixedDbKey() ) ) .
 531                         wfElement( 'input', array(
 532                                 'type' => 'hidden',
 533                                 'name' => 'timestamp',
 534                                 'value' => $timestamp ) ) .
 535                         wfElement( 'input', array(
 536                                 'type' => 'hidden',
 537                                 'name' => 'wpEditToken',
 538                                 'value' => $wgUser->editToken() ) ) .
 539                         wfElement( 'input', array(
 540                                 'type' => 'hidden',
 541                                 'name' => 'preview',
 542                                 'value' => '1' ) ) .
 543                         wfElement( 'input', array(
 544                                 'type' => 'submit',
 545                                 'value' => wfMsg( 'showpreview' ) ) ) .
 546                         wfCloseElement( 'form' ) .
 547                         wfCloseElement( 'div' ) );
 548         }
 549
 550         /**
 551          * Show a deleted file version requested by the visitor.
 552          */
 553         function showFile( $key ) {
 554                 global $wgOut;
 555                 $wgOut->disable();
 556
 557                 $store = FileStore::get( 'deleted' );
 558                 $store->stream( $key );
 559         }
 560
 561         /* private */ function showHistory() {
 562                 global $wgLang, $wgUser, $wgOut;
 563
 564                 $sk = $wgUser->getSkin();
 565                 if ( $this->mAllowed ) {
 566                         $wgOut->setPagetitle( wfMsg( "undeletepage" ) );
 567                 } else {
 568                         $wgOut->setPagetitle( wfMsg( 'viewdeletedpage' ) );
 569                 }
 570
 571                 $archive = new PageArchive( $this->mTargetObj );
 572                 $text = $archive->getLastRevisionText();
 573                 /*
 574                 if( is_null( $text ) ) {
 575                         $wgOut->addWikiText( wfMsg( "nohistory" ) );
 576                         return;
 577                 }
 578                 */
 579                 if ( $this->mAllowed ) {
 580                         $wgOut->addWikiText( wfMsg( "undeletehistory" ) );
 581                 } else {
 582                         $wgOut->addWikiText( wfMsg( "undeletehistorynoadmin" ) );
 583                 }
 584
 585                 # List all stored revisions
 586                 $revisions = $archive->listRevisions();
 587                 $files = $archive->listFiles();
 588
 589                 $haveRevisions = $revisions && $revisions->numRows() > 0;
 590                 $haveFiles = $files && $files->numRows() > 0;
 591
 592                 # Batch existence check on user and talk pages
 593                 if( $haveRevisions ) {
 594                         $batch = new LinkBatch();
 595                         while( $row = $revisions->fetchObject() ) {
 596                                 $batch->addObj( Title::makeTitleSafe( NS_USER, $row->ar_user_text ) );
 597                                 $batch->addObj( Title::makeTitleSafe( NS_USER_TALK, $row->ar_user_text ) );
 598                         }
 599                         $batch->execute();
 600                         $revisions->seek( 0 );
 601                 }
 602                 if( $haveFiles ) {
 603                         $batch = new LinkBatch();
 604                         while( $row = $files->fetchObject() ) {
 605                                 $batch->addObj( Title::makeTitleSafe( NS_USER, $row->fa_user_text ) );
 606                                 $batch->addObj( Title::makeTitleSafe( NS_USER_TALK, $row->fa_user_text ) );
 607                         }
 608                         $batch->execute();
 609                         $files->seek( 0 );
 610                 }
 611
 612                 if ( $this->mAllowed ) {
 613                         $titleObj = Title::makeTitle( NS_SPECIAL, "Undelete" );
 614                         $action = $titleObj->getLocalURL( "action=submit" );
 615                         # Start the form here
 616                         $top = wfOpenElement( 'form', array( 'method' => 'post', 'action' => $action, 'id' => 'undelete' ) );
 617                         $wgOut->addHtml( $top );
 618                 }
 619
 620                 # Show relevant lines from the deletion log:
 621                 $wgOut->addHTML( "<h2>" . htmlspecialchars( LogPage::logName( 'delete' ) ) . "</h2>\n" );
 622                 require_once( 'SpecialLog.php' );
 623                 $logViewer = new LogViewer(
 624                         new LogReader(
 625                                 new FauxRequest(
 626                                         array( 'page' => $this->mTargetObj->getPrefixedText(),
 627                                                    'type' => 'delete' ) ) ) );
 628                 $logViewer->showList( $wgOut );
 629
 630                 if( $this->mAllowed && ( $haveRevisions || $haveFiles ) ) {
 631                         # Format the user-visible controls (comment field, submission button)
 632                         # in a nice little table
 633                         $table = '<fieldset><table><tr>';
 634                         $table .= '<td colspan="2">' . wfMsgWikiHtml( 'undeleteextrahelp' ) . '</td></tr><tr>';
 635                         $table .= '<td align="right"><strong>' . wfMsgHtml( 'undeletecomment' ) . '</strong></td>';
 636                         $table .= '<td>' . wfInput( 'wpComment', 50, $this->mComment ) . '</td>';
 637                         $table .= '</tr><tr><td>&nbsp;</td><td>';
 638                         $table .= wfSubmitButton( wfMsg( 'undeletebtn' ), array( 'name' => 'restore' ) );
 639                         $table .= wfElement( 'input', array( 'type' => 'reset', 'value' => wfMsg( 'undeletereset' ) ) );
 640                         $table .= '</td></tr></table></fieldset>';
 641                         $wgOut->addHtml( $table );
 642                 }
 643
 644                 $wgOut->addHTML( "<h2>" . htmlspecialchars( wfMsg( "history" ) ) . "</h2>\n" );
 645
 646                 if( $haveRevisions ) {
 647                         # The page's stored (deleted) history:
 648                         $wgOut->addHTML("<ul>");
 649                         $target = urlencode( $this->mTarget );
 650                         while( $row = $revisions->fetchObject() ) {
 651                                 $ts = wfTimestamp( TS_MW, $row->ar_timestamp );
 652                                 if ( $this->mAllowed ) {
 653                                         $checkBox = wfCheck( "ts$ts" );
 654                                         $pageLink = $sk->makeKnownLinkObj( $titleObj,
 655                                                 $wgLang->timeanddate( $ts, true ),
 656                                                 "target=$target&timestamp=$ts" );
 657                                 } else {
 658                                         $checkBox = '';
 659                                         $pageLink = $wgLang->timeanddate( $ts, true );
 660                                 }
 661                                 $userLink = $sk->userLink( $row->ar_user, $row->ar_user_text ) . $sk->userToolLinks( $row->ar_user, $row->ar_user_text );
 662                                 $comment = $sk->commentBlock( $row->ar_comment );
 663                                 $wgOut->addHTML( "<li>$checkBox $pageLink . . $userLink $comment</li>\n" );
 664
 665                         }
 666                         $revisions->free();
 667                         $wgOut->addHTML("</ul>");
 668                 } else {
 669                         $wgOut->addWikiText( wfMsg( "nohistory" ) );
 670                 }
 671
 672
 673                 if( $haveFiles ) {
 674                         $wgOut->addHtml( "<h2>" . wfMsgHtml( 'imghistory' ) . "</h2>\n" );
 675                         $wgOut->addHtml( "<ul>" );
 676                         while( $row = $files->fetchObject() ) {
 677                                 $ts = wfTimestamp( TS_MW, $row->fa_timestamp );
 678                                 if ( $this->mAllowed && $row->fa_storage_key ) {
 679                                         $checkBox = wfCheck( "fileid" . $row->fa_id );
 680                                         $key = urlencode( $row->fa_storage_key );
 681                                         $target = urlencode( $this->mTarget );
 682                                         $pageLink = $sk->makeKnownLinkObj( $titleObj,
 683                                                 $wgLang->timeanddate( $ts, true ),
 684                                                 "target=$target&file=$key" );
 685                                 } else {
 686                                         $checkBox = '';
 687                                         $pageLink = $wgLang->timeanddate( $ts, true );
 688                                 }
 689                                 $userLink = $sk->userLink( $row->fa_user, $row->fa_user_text ) . $sk->userToolLinks( $row->fa_user, $row->fa_user_text );
 690                                 $data =
 691                                         wfMsgHtml( 'widthheight',
 692                                                 $wgLang->formatNum( $row->fa_width ),
 693                                                 $wgLang->formatNum( $row->fa_height ) ) .
 694                                         ' (' .
 695                                         wfMsgHtml( 'nbytes', $wgLang->formatNum( $row->fa_size ) ) .
 696                                         ')';
 697                                 $comment = $sk->commentBlock( $row->fa_description );
 698                                 $wgOut->addHTML( "<li>$checkBox $pageLink . . $userLink $data $comment</li>\n" );
 699                         }
 700                         $files->free();
 701                         $wgOut->addHTML( "</ul>" );
 702                 }
 703
 704                 if ( $this->mAllowed ) {
 705                         # Slip in the hidden controls here
 706                         $misc  = wfHidden( 'target', $this->mTarget );
 707                         $misc .= wfHidden( 'wpEditToken', $wgUser->editToken() );
 708                         $wgOut->addHtml( $misc . '</form>' );
 709                 }
 710
 711                 return true;
 712         }
 713
 714         function undelete() {
 715                 global $wgOut, $wgUser;
 716                 if( !is_null( $this->mTargetObj ) ) {
 717                         $archive = new PageArchive( $this->mTargetObj );
 718                         $ok = true;
 719
 720                         $ok = $archive->undelete(
 721                                 $this->mTargetTimestamp,
 722                                 $this->mComment,
 723                                 $this->mFileVersions );
 724
 725                         if( $ok ) {
 726                                 $skin =& $wgUser->getSkin();
 727                                 $link = $skin->makeKnownLinkObj( $this->mTargetObj );
 728                                 $wgOut->addHtml( wfMsgWikiHtml( 'undeletedpage', $link ) );
 729                                 return true;
 730                         }
 731                 }
 732                 $wgOut->showFatalError( wfMsg( "cannotundelete" ) );
 733                 return false;
 734         }
 735 }
 736
 737 ?>