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          * @deprecated Use getRevision() for more flexible information
 109          */
 110         function getRevisionText( $timestamp ) {
 111                 $rev = $this->getRevision( $timestamp );
 112                 return $rev ? $rev->getText() : null;
 113         }
 114
 115         /**
 116          * Return a Revision object containing data for the deleted revision.
 117          * Note that the result *may* or *may not* have a null page ID.
 118          * @param string $timestamp
 119          * @return Revision
 120          */
 121         function getRevision( $timestamp ) {
 122                 $dbr =& wfGetDB( DB_SLAVE );
 123                 $row = $dbr->selectRow( 'archive',
 124                         array(
 125                                 'ar_rev_id',
 126                                 'ar_text',
 127                                 'ar_comment',
 128                                 'ar_user',
 129                                 'ar_user_text',
 130                                 'ar_timestamp',
 131                                 'ar_minor_edit',
 132                                 'ar_flags',
 133                                 'ar_text_id' ),
 134                         array( 'ar_namespace' => $this->title->getNamespace(),
 135                                'ar_title' => $this->title->getDbkey(),
 136                                'ar_timestamp' => $dbr->timestamp( $timestamp ) ),
 137                         __METHOD__ );
 138                 if( $row ) {
 139                         return new Revision( array(
 140                                 'page'       => $this->title->getArticleId(),
 141                                 'id'         => $row->ar_rev_id,
 142                                 'text'       => ($row->ar_text_id
 143                                         ? null
 144                                         : Revision::getRevisionText( $row, 'ar_' ) ),
 145                                 'comment'    => $row->ar_comment,
 146                                 'user'       => $row->ar_user,
 147                                 'user_text'  => $row->ar_user_text,
 148                                 'timestamp'  => $row->ar_timestamp,
 149                                 'minor_edit' => $row->ar_minor_edit,
 150                                 'text_id'    => $row->ar_text_id ) );
 151                 } else {
 152                         return null;
 153                 }
 154         }
 155
 156         /**
 157          * Get the text from an archive row containing ar_text, ar_flags and ar_text_id
 158          */
 159         function getTextFromRow( $row ) {
 160                 if( is_null( $row->ar_text_id ) ) {
 161                         // An old row from MediaWiki 1.4 or previous.
 162                         // Text is embedded in this row in classic compression format.
 163                         return Revision::getRevisionText( $row, "ar_" );
 164                 } else {
 165                         // New-style: keyed to the text storage backend.
 166                         $dbr =& wfGetDB( DB_SLAVE );
 167                         $text = $dbr->selectRow( 'text',
 168                                 array( 'old_text', 'old_flags' ),
 169                                 array( 'old_id' => $row->ar_text_id ),
 170                                 __METHOD__ );
 171                         return Revision::getRevisionText( $text );
 172                 }
 173         }
 174
 175
 176         /**
 177          * Fetch (and decompress if necessary) the stored text of the most
 178          * recently edited deleted revision of the page.
 179          *
 180          * If there are no archived revisions for the page, returns NULL.
 181          *
 182          * @return string
 183          */
 184         function getLastRevisionText() {
 185                 $dbr =& wfGetDB( DB_SLAVE );
 186                 $row = $dbr->selectRow( 'archive',
 187                         array( 'ar_text', 'ar_flags', 'ar_text_id' ),
 188                         array( 'ar_namespace' => $this->title->getNamespace(),
 189                                'ar_title' => $this->title->getDBkey() ),
 190                         'PageArchive::getLastRevisionText',
 191                         array( 'ORDER BY' => 'ar_timestamp DESC' ) );
 192                 if( $row ) {
 193                         return $this->getTextFromRow( $row );
 194                 } else {
 195                         return NULL;
 196                 }
 197         }
 198
 199         /**
 200          * Quick check if any archived revisions are present for the page.
 201          * @return bool
 202          */
 203         function isDeleted() {
 204                 $dbr =& wfGetDB( DB_SLAVE );
 205                 $n = $dbr->selectField( 'archive', 'COUNT(ar_title)',
 206                         array( 'ar_namespace' => $this->title->getNamespace(),
 207                                'ar_title' => $this->title->getDBkey() ) );
 208                 return ($n > 0);
 209         }
 210
 211         /**
 212          * Restore the given (or all) text and file revisions for the page.
 213          * Once restored, the items will be removed from the archive tables.
 214          * The deletion log will be updated with an undeletion notice.
 215          *
 216          * @param array $timestamps Pass an empty array to restore all revisions, otherwise list the ones to undelete.
 217          * @param string $comment
 218          * @param array $fileVersions
 219          *
 220          * @return true on success.
 221          */
 222         function undelete( $timestamps, $comment = '', $fileVersions = array() ) {
 223                 // If both the set of text revisions and file revisions are empty,
 224                 // restore everything. Otherwise, just restore the requested items.
 225                 $restoreAll = empty( $timestamps ) && empty( $fileVersions );
 226
 227                 $restoreText = $restoreAll || !empty( $timestamps );
 228                 $restoreFiles = $restoreAll || !empty( $fileVersions );
 229
 230                 if( $restoreFiles && $this->title->getNamespace() == NS_IMAGE ) {
 231                         $img = new Image( $this->title );
 232                         $filesRestored = $img->restore( $fileVersions );
 233                 } else {
 234                         $filesRestored = 0;
 235                 }
 236
 237                 if( $restoreText ) {
 238                         $textRestored = $this->undeleteRevisions( $timestamps );
 239                 } else {
 240                         $textRestored = 0;
 241                 }
 242
 243                 // Touch the log!
 244                 global $wgContLang;
 245                 $log = new LogPage( 'delete' );
 246
 247                 if( $textRestored && $filesRestored ) {
 248                         $reason = wfMsgForContent( 'undeletedrevisions-files',
 249                                 $wgContLang->formatNum( $textRestored ),
 250                                 $wgContLang->formatNum( $filesRestored ) );
 251                 } elseif( $textRestored ) {
 252                         $reason = wfMsgForContent( 'undeletedrevisions',
 253                                 $wgContLang->formatNum( $textRestored ) );
 254                 } elseif( $filesRestored ) {
 255                         $reason = wfMsgForContent( 'undeletedfiles',
 256                                 $wgContLang->formatNum( $filesRestored ) );
 257                 } else {
 258                         wfDebug( "Undelete: nothing undeleted...\n" );
 259                         return false;
 260                 }
 261
 262                 if( trim( $comment ) != '' )
 263                         $reason .= ": {$comment}";
 264                 $log->addEntry( 'restore', $this->title, $reason );
 265
 266                 return true;
 267         }
 268
 269         /**
 270          * This is the meaty bit -- restores archived revisions of the given page
 271          * to the cur/old tables. If the page currently exists, all revisions will
 272          * be stuffed into old, otherwise the most recent will go into cur.
 273          *
 274          * @param array $timestamps Pass an empty array to restore all revisions, otherwise list the ones to undelete.
 275          * @param string $comment
 276          * @param array $fileVersions
 277          *
 278          * @return int number of revisions restored
 279          */
 280         private function undeleteRevisions( $timestamps ) {
 281                 global $wgDBtype;
 282
 283                 $restoreAll = empty( $timestamps );
 284
 285                 $dbw =& wfGetDB( DB_MASTER );
 286                 $page = $dbw->tableName( 'archive' );
 287
 288                 # Does this page already exist? We'll have to update it...
 289                 $article = new Article( $this->title );
 290                 $options = ( $wgDBtype == 'postgres' )
 291                         ? '' // pg doesn't support this?
 292                         : 'FOR UPDATE';
 293                 $page = $dbw->selectRow( 'page',
 294                         array( 'page_id', 'page_latest' ),
 295                         array( 'page_namespace' => $this->title->getNamespace(),
 296                                'page_title'     => $this->title->getDBkey() ),
 297                         __METHOD__,
 298                         $options );
 299                 if( $page ) {
 300                         # Page already exists. Import the history, and if necessary
 301                         # we'll update the latest revision field in the record.
 302                         $newid             = 0;
 303                         $pageId            = $page->page_id;
 304                         $previousRevId     = $page->page_latest;
 305                 } else {
 306                         # Have to create a new article...
 307                         $newid  = $article->insertOn( $dbw );
 308                         $pageId = $newid;
 309                         $previousRevId = 0;
 310                 }
 311
 312                 if( $restoreAll ) {
 313                         $oldones = '1 = 1'; # All revisions...
 314                 } else {
 315                         $oldts = implode( ',',
 316                                 array_map( array( &$dbw, 'addQuotes' ),
 317                                         array_map( array( &$dbw, 'timestamp' ),
 318                                                 $timestamps ) ) );
 319
 320                         $oldones = "ar_timestamp IN ( {$oldts} )";
 321                 }
 322
 323                 /**
 324                  * Restore each revision...
 325                  */
 326                 $result = $dbw->select( 'archive',
 327                         /* fields */ array(
 328                                 'ar_rev_id',
 329                                 'ar_text',
 330                                 'ar_comment',
 331                                 'ar_user',
 332                                 'ar_user_text',
 333                                 'ar_timestamp',
 334                                 'ar_minor_edit',
 335                                 'ar_flags',
 336                                 'ar_text_id' ),
 337                         /* WHERE */ array(
 338                                 'ar_namespace' => $this->title->getNamespace(),
 339                                 'ar_title'     => $this->title->getDBkey(),
 340                                 $oldones ),
 341                         __METHOD__,
 342                         /* options */ array(
 343                                 'ORDER BY' => 'ar_timestamp' )
 344                         );
 345                 if( $dbw->numRows( $result ) < count( $timestamps ) ) {
 346                         wfDebug( __METHOD__.": couldn't find all requested rows\n" );
 347                         return false;
 348                 }
 349
 350                 $revision = null;
 351                 $restored = 0;
 352
 353                 while( $row = $dbw->fetchObject( $result ) ) {
 354                         if( $row->ar_text_id ) {
 355                                 // Revision was deleted in 1.5+; text is in
 356                                 // the regular text table, use the reference.
 357                                 // Specify null here so the so the text is
 358                                 // dereferenced for page length info if needed.
 359                                 $revText = null;
 360                         } else {
 361                                 // Revision was deleted in 1.4 or earlier.
 362                                 // Text is squashed into the archive row, and
 363                                 // a new text table entry will be created for it.
 364                                 $revText = Revision::getRevisionText( $row, 'ar_' );
 365                         }
 366                         $revision = new Revision( array(
 367                                 'page'       => $pageId,
 368                                 'id'         => $row->ar_rev_id,
 369                                 'text'       => $revText,
 370                                 'comment'    => $row->ar_comment,
 371                                 'user'       => $row->ar_user,
 372                                 'user_text'  => $row->ar_user_text,
 373                                 'timestamp'  => $row->ar_timestamp,
 374                                 'minor_edit' => $row->ar_minor_edit,
 375                                 'text_id'    => $row->ar_text_id,
 376                                 ) );
 377                         $revision->insertOn( $dbw );
 378                         $restored++;
 379                 }
 380
 381                 if( $revision ) {
 382                         # FIXME: Update latest if newer as well...
 383                         if( $newid ) {
 384                                 // Attach the latest revision to the page...
 385                                 $article->updateRevisionOn( $dbw, $revision, $previousRevId );
 386
 387                                 // Update site stats, link tables, etc
 388                                 $article->createUpdates( $revision );
 389                         }
 390
 391                         if( $newid ) {
 392                                 Article::onArticleCreate( $this->title );
 393                         } else {
 394                                 Article::onArticleEdit( $this->title );
 395                         }
 396                 } else {
 397                         # Something went terribly wrong!
 398                 }
 399
 400                 # Now that it's safely stored, take it out of the archive
 401                 $dbw->delete( 'archive',
 402                         /* WHERE */ array(
 403                                 'ar_namespace' => $this->title->getNamespace(),
 404                                 'ar_title' => $this->title->getDBkey(),
 405                                 $oldones ),
 406                         __METHOD__ );
 407
 408                 return $restored;
 409         }
 410
 411 }
 412
 413 /**
 414  *
 415  * @package MediaWiki
 416  * @subpackage SpecialPage
 417  */
 418 class UndeleteForm {
 419         var $mAction, $mTarget, $mTimestamp, $mRestore, $mTargetObj;
 420         var $mTargetTimestamp, $mAllowed, $mComment;
 421
 422         function UndeleteForm( &$request, $par = "" ) {
 423                 global $wgUser;
 424                 $this->mAction = $request->getVal( 'action' );
 425                 $this->mTarget = $request->getVal( 'target' );
 426                 $time = $request->getVal( 'timestamp' );
 427                 $this->mTimestamp = $time ? wfTimestamp( TS_MW, $time ) : '';
 428                 $this->mFile = $request->getVal( 'file' );
 429
 430                 $posted = $request->wasPosted() &&
 431                         $wgUser->matchEditToken( $request->getVal( 'wpEditToken' ) );
 432                 $this->mRestore = $request->getCheck( 'restore' ) && $posted;
 433                 $this->mPreview = $request->getCheck( 'preview' ) && $posted;
 434                 $this->mComment = $request->getText( 'wpComment' );
 435
 436                 if( $par != "" ) {
 437                         $this->mTarget = $par;
 438                 }
 439                 if ( $wgUser->isAllowed( 'delete' ) && !$wgUser->isBlocked() ) {
 440                         $this->mAllowed = true;
 441                 } else {
 442                         $this->mAllowed = false;
 443                         $this->mTimestamp = '';
 444                         $this->mRestore = false;
 445                 }
 446                 if ( $this->mTarget !== "" ) {
 447                         $this->mTargetObj = Title::newFromURL( $this->mTarget );
 448                 } else {
 449                         $this->mTargetObj = NULL;
 450                 }
 451                 if( $this->mRestore ) {
 452                         $timestamps = array();
 453                         $this->mFileVersions = array();
 454                         foreach( $_REQUEST as $key => $val ) {
 455                                 $matches = array();
 456                                 if( preg_match( '/^ts(\d{14})$/', $key, $matches ) ) {
 457                                         array_push( $timestamps, $matches[1] );
 458                                 }
 459
 460                                 if( preg_match( '/^fileid(\d+)$/', $key, $matches ) ) {
 461                                         $this->mFileVersions[] = intval( $matches[1] );
 462                                 }
 463                         }
 464                         rsort( $timestamps );
 465                         $this->mTargetTimestamp = $timestamps;
 466                 }
 467         }
 468
 469         function execute() {
 470
 471                 if( is_null( $this->mTargetObj ) ) {
 472                         return $this->showList();
 473                 }
 474                 if( $this->mTimestamp !== '' ) {
 475                         return $this->showRevision( $this->mTimestamp );
 476                 }
 477                 if( $this->mFile !== null ) {
 478                         return $this->showFile( $this->mFile );
 479                 }
 480                 if( $this->mRestore && $this->mAction == "submit" ) {
 481                         return $this->undelete();
 482                 }
 483                 return $this->showHistory();
 484         }
 485
 486         /* private */ function showList() {
 487                 global $wgLang, $wgContLang, $wgUser, $wgOut;
 488
 489                 # List undeletable articles
 490                 $result = PageArchive::listAllPages();
 491
 492                 if ( $this->mAllowed ) {
 493                         $wgOut->setPagetitle( wfMsg( "undeletepage" ) );
 494                 } else {
 495                         $wgOut->setPagetitle( wfMsg( "viewdeletedpage" ) );
 496                 }
 497                 $wgOut->addWikiText( wfMsg( "undeletepagetext" ) );
 498
 499                 $sk = $wgUser->getSkin();
 500                 $undelete = SpecialPage::getTitleFor( 'Undelete' );
 501                 $wgOut->addHTML( "<ul>\n" );
 502                 while( $row = $result->fetchObject() ) {
 503                         $title = Title::makeTitleSafe( $row->ar_namespace, $row->ar_title );
 504                         $link = $sk->makeKnownLinkObj( $undelete, htmlspecialchars( $title->getPrefixedText() ), 'target=' . $title->getPrefixedUrl() );
 505                         $revs = wfMsgHtml( 'undeleterevisions', $wgLang->formatNum( $row->count ) );
 506                         $wgOut->addHtml( "<li>{$link} ({$revs})</li>\n" );
 507                 }
 508                 $result->free();
 509                 $wgOut->addHTML( "</ul>\n" );
 510
 511                 return true;
 512         }
 513
 514         /* private */ function showRevision( $timestamp ) {
 515                 global $wgLang, $wgUser, $wgOut;
 516
 517                 if(!preg_match("/[0-9]{14}/",$timestamp)) return 0;
 518
 519                 $archive = new PageArchive( $this->mTargetObj );
 520                 $rev = $archive->getRevision( $timestamp );
 521
 522                 $wgOut->setPagetitle( wfMsg( "undeletepage" ) );
 523                 $wgOut->addWikiText( "(" . wfMsg( "undeleterevision",
 524                         $wgLang->date( $timestamp ) ) . ")\n" );
 525
 526                 if( !$rev ) {
 527                         $wgOut->addWikiText( wfMsg( 'undeleterevision-missing' ) );
 528                         return;
 529                 }
 530
 531                 wfRunHooks( 'UndeleteShowRevision', array( $this->mTargetObj, $rev ) );
 532
 533                 if( $this->mPreview ) {
 534                         $wgOut->addHtml( "<hr />\n" );
 535                         $article = new Article ( $archive->title );  # OutputPage wants an Article obj
 536                         $wgOut->addPrimaryWikiText( $rev->getText(), $article, false );
 537                 }
 538
 539                 $self = SpecialPage::getTitleFor( "Undelete" );
 540
 541                 $wgOut->addHtml(
 542                         wfElement( 'textarea', array(
 543                                         'readonly' => true,
 544                                         'cols' => intval( $wgUser->getOption( 'cols' ) ),
 545                                         'rows' => intval( $wgUser->getOption( 'rows' ) ) ),
 546                                 $rev->getText() . "\n" ) .
 547                         wfOpenElement( 'div' ) .
 548                         wfOpenElement( 'form', array(
 549                                 'method' => 'post',
 550                                 'action' => $self->getLocalURL( "action=submit" ) ) ) .
 551                         wfElement( 'input', array(
 552                                 'type' => 'hidden',
 553                                 'name' => 'target',
 554                                 'value' => $this->mTargetObj->getPrefixedDbKey() ) ) .
 555                         wfElement( 'input', array(
 556                                 'type' => 'hidden',
 557                                 'name' => 'timestamp',
 558                                 'value' => $timestamp ) ) .
 559                         wfElement( 'input', array(
 560                                 'type' => 'hidden',
 561                                 'name' => 'wpEditToken',
 562                                 'value' => $wgUser->editToken() ) ) .
 563                         wfElement( 'input', array(
 564                                 'type' => 'hidden',
 565                                 'name' => 'preview',
 566                                 'value' => '1' ) ) .
 567                         wfElement( 'input', array(
 568                                 'type' => 'submit',
 569                                 'value' => wfMsg( 'showpreview' ) ) ) .
 570                         wfCloseElement( 'form' ) .
 571                         wfCloseElement( 'div' ) );
 572         }
 573
 574         /**
 575          * Show a deleted file version requested by the visitor.
 576          */
 577         function showFile( $key ) {
 578                 global $wgOut;
 579                 $wgOut->disable();
 580
 581                 $store = FileStore::get( 'deleted' );
 582                 $store->stream( $key );
 583         }
 584
 585         /* private */ function showHistory() {
 586                 global $wgLang, $wgUser, $wgOut;
 587
 588                 $sk = $wgUser->getSkin();
 589                 if ( $this->mAllowed ) {
 590                         $wgOut->setPagetitle( wfMsg( "undeletepage" ) );
 591                 } else {
 592                         $wgOut->setPagetitle( wfMsg( 'viewdeletedpage' ) );
 593                 }
 594
 595                 $archive = new PageArchive( $this->mTargetObj );
 596                 /*
 597                 $text = $archive->getLastRevisionText();
 598                 if( is_null( $text ) ) {
 599                         $wgOut->addWikiText( wfMsg( "nohistory" ) );
 600                         return;
 601                 }
 602                 */
 603                 if ( $this->mAllowed ) {
 604                         $wgOut->addWikiText( wfMsg( "undeletehistory" ) );
 605                 } else {
 606                         $wgOut->addWikiText( wfMsg( "undeletehistorynoadmin" ) );
 607                 }
 608
 609                 # List all stored revisions
 610                 $revisions = $archive->listRevisions();
 611                 $files = $archive->listFiles();
 612
 613                 $haveRevisions = $revisions && $revisions->numRows() > 0;
 614                 $haveFiles = $files && $files->numRows() > 0;
 615
 616                 # Batch existence check on user and talk pages
 617                 if( $haveRevisions ) {
 618                         $batch = new LinkBatch();
 619                         while( $row = $revisions->fetchObject() ) {
 620                                 $batch->addObj( Title::makeTitleSafe( NS_USER, $row->ar_user_text ) );
 621                                 $batch->addObj( Title::makeTitleSafe( NS_USER_TALK, $row->ar_user_text ) );
 622                         }
 623                         $batch->execute();
 624                         $revisions->seek( 0 );
 625                 }
 626                 if( $haveFiles ) {
 627                         $batch = new LinkBatch();
 628                         while( $row = $files->fetchObject() ) {
 629                                 $batch->addObj( Title::makeTitleSafe( NS_USER, $row->fa_user_text ) );
 630                                 $batch->addObj( Title::makeTitleSafe( NS_USER_TALK, $row->fa_user_text ) );
 631                         }
 632                         $batch->execute();
 633                         $files->seek( 0 );
 634                 }
 635
 636                 if ( $this->mAllowed ) {
 637                         $titleObj = SpecialPage::getTitleFor( "Undelete" );
 638                         $action = $titleObj->getLocalURL( "action=submit" );
 639                         # Start the form here
 640                         $top = wfOpenElement( 'form', array( 'method' => 'post', 'action' => $action, 'id' => 'undelete' ) );
 641                         $wgOut->addHtml( $top );
 642                 }
 643
 644                 # Show relevant lines from the deletion log:
 645                 $wgOut->addHTML( "<h2>" . htmlspecialchars( LogPage::logName( 'delete' ) ) . "</h2>\n" );
 646                 $logViewer = new LogViewer(
 647                         new LogReader(
 648                                 new FauxRequest(
 649                                         array( 'page' => $this->mTargetObj->getPrefixedText(),
 650                                                    'type' => 'delete' ) ) ) );
 651                 $logViewer->showList( $wgOut );
 652
 653                 if( $this->mAllowed && ( $haveRevisions || $haveFiles ) ) {
 654                         # Format the user-visible controls (comment field, submission button)
 655                         # in a nice little table
 656                         $table = '<fieldset><table><tr>';
 657                         $table .= '<td colspan="2">' . wfMsgWikiHtml( 'undeleteextrahelp' ) . '</td></tr><tr>';
 658                         $table .= '<td align="right"><strong>' . wfMsgHtml( 'undeletecomment' ) . '</strong></td>';
 659                         $table .= '<td>' . wfInput( 'wpComment', 50, $this->mComment ) . '</td>';
 660                         $table .= '</tr><tr><td>&nbsp;</td><td>';
 661                         $table .= wfSubmitButton( wfMsg( 'undeletebtn' ), array( 'name' => 'restore' ) );
 662                         $table .= wfElement( 'input', array( 'type' => 'reset', 'value' => wfMsg( 'undeletereset' ) ) );
 663                         $table .= '</td></tr></table></fieldset>';
 664                         $wgOut->addHtml( $table );
 665                 }
 666
 667                 $wgOut->addHTML( "<h2>" . htmlspecialchars( wfMsg( "history" ) ) . "</h2>\n" );
 668
 669                 if( $haveRevisions ) {
 670                         # The page's stored (deleted) history:
 671                         $wgOut->addHTML("<ul>");
 672                         $target = urlencode( $this->mTarget );
 673                         while( $row = $revisions->fetchObject() ) {
 674                                 $ts = wfTimestamp( TS_MW, $row->ar_timestamp );
 675                                 if ( $this->mAllowed ) {
 676                                         $checkBox = wfCheck( "ts$ts" );
 677                                         $pageLink = $sk->makeKnownLinkObj( $titleObj,
 678                                                 $wgLang->timeanddate( $ts, true ),
 679                                                 "target=$target&timestamp=$ts" );
 680                                 } else {
 681                                         $checkBox = '';
 682                                         $pageLink = $wgLang->timeanddate( $ts, true );
 683                                 }
 684                                 $userLink = $sk->userLink( $row->ar_user, $row->ar_user_text ) . $sk->userToolLinks( $row->ar_user, $row->ar_user_text );
 685                                 $comment = $sk->commentBlock( $row->ar_comment );
 686                                 $wgOut->addHTML( "<li>$checkBox $pageLink . . $userLink $comment</li>\n" );
 687
 688                         }
 689                         $revisions->free();
 690                         $wgOut->addHTML("</ul>");
 691                 } else {
 692                         $wgOut->addWikiText( wfMsg( "nohistory" ) );
 693                 }
 694
 695
 696                 if( $haveFiles ) {
 697                         $wgOut->addHtml( "<h2>" . wfMsgHtml( 'imghistory' ) . "</h2>\n" );
 698                         $wgOut->addHtml( "<ul>" );
 699                         while( $row = $files->fetchObject() ) {
 700                                 $ts = wfTimestamp( TS_MW, $row->fa_timestamp );
 701                                 if ( $this->mAllowed && $row->fa_storage_key ) {
 702                                         $checkBox = wfCheck( "fileid" . $row->fa_id );
 703                                         $key = urlencode( $row->fa_storage_key );
 704                                         $target = urlencode( $this->mTarget );
 705                                         $pageLink = $sk->makeKnownLinkObj( $titleObj,
 706                                                 $wgLang->timeanddate( $ts, true ),
 707                                                 "target=$target&file=$key" );
 708                                 } else {
 709                                         $checkBox = '';
 710                                         $pageLink = $wgLang->timeanddate( $ts, true );
 711                                 }
 712                                 $userLink = $sk->userLink( $row->fa_user, $row->fa_user_text ) . $sk->userToolLinks( $row->fa_user, $row->fa_user_text );
 713                                 $data =
 714                                         wfMsgHtml( 'widthheight',
 715                                                 $wgLang->formatNum( $row->fa_width ),
 716                                                 $wgLang->formatNum( $row->fa_height ) ) .
 717                                         ' (' .
 718                                         wfMsgHtml( 'nbytes', $wgLang->formatNum( $row->fa_size ) ) .
 719                                         ')';
 720                                 $comment = $sk->commentBlock( $row->fa_description );
 721                                 $wgOut->addHTML( "<li>$checkBox $pageLink . . $userLink $data $comment</li>\n" );
 722                         }
 723                         $files->free();
 724                         $wgOut->addHTML( "</ul>" );
 725                 }
 726
 727                 if ( $this->mAllowed ) {
 728                         # Slip in the hidden controls here
 729                         $misc  = wfHidden( 'target', $this->mTarget );
 730                         $misc .= wfHidden( 'wpEditToken', $wgUser->editToken() );
 731                         $wgOut->addHtml( $misc . '</form>' );
 732                 }
 733
 734                 return true;
 735         }
 736
 737         function undelete() {
 738                 global $wgOut, $wgUser;
 739                 if( !is_null( $this->mTargetObj ) ) {
 740                         $archive = new PageArchive( $this->mTargetObj );
 741
 742                         $ok = $archive->undelete(
 743                                 $this->mTargetTimestamp,
 744                                 $this->mComment,
 745                                 $this->mFileVersions );
 746
 747                         if( $ok ) {
 748                                 $skin =& $wgUser->getSkin();
 749                                 $link = $skin->makeKnownLinkObj( $this->mTargetObj );
 750                                 $wgOut->addHtml( wfMsgWikiHtml( 'undeletedpage', $link ) );
 751                                 return true;
 752                         }
 753                 }
 754                 $wgOut->showFatalError( wfMsg( "cannotundelete" ) );
 755                 return false;
 756         }
 757 }
 758
 759 ?>