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  * @addtogroup SpecialPage
   8  */
   9
  10 /**
  11  * Constructor
  12  */
  13 function wfSpecialUndelete( $par ) {
  14         global $wgRequest;
  15
  16         $form = new UndeleteForm( $wgRequest, $par );
  17         $form->execute();
  18 }
  19
  20 /**
  21  * Used to show archived pages and eventually restore them.
  22  * @addtogroup SpecialPage
  23  */
  24 class PageArchive {
  25         protected $title;
  26
  27         function __construct( $title ) {
  28                 if( is_null( $title ) ) {
  29                         throw new MWException( 'Archiver() given a null title.');
  30                 }
  31                 $this->title = $title;
  32         }
  33
  34         /**
  35          * List all deleted pages recorded in the archive table. Returns result
  36          * wrapper with (ar_namespace, ar_title, count) fields, ordered by page
  37          * namespace/title.
  38          *
  39          * @return ResultWrapper
  40          */
  41         public static function listAllPages() {
  42                 $dbr = wfGetDB( DB_SLAVE );
  43                 return self::listPages( $dbr, '' );
  44         }
  45
  46         /**
  47          * List deleted pages recorded in the archive table matching the
  48          * given title prefix.
  49          * Returns result wrapper with (ar_namespace, ar_title, count) fields.
  50          *
  51          * @return ResultWrapper
  52          */
  53         public static function listPagesByPrefix( $prefix ) {
  54                 $dbr = wfGetDB( DB_SLAVE );
  55
  56                 $title = Title::newFromText( $prefix );
  57                 if( $title ) {
  58                         $ns = $title->getNamespace();
  59                         $encPrefix = $dbr->escapeLike( $title->getDbKey() );
  60                 } else {
  61                         // Prolly won't work too good
  62                         // @todo handle bare namespace names cleanly?
  63                         $ns = 0;
  64                         $encPrefix = $dbr->escapeLike( $prefix );
  65                 }
  66                 $conds = array(
  67                         'ar_namespace' => $ns,
  68                         "ar_title LIKE '$encPrefix%'",
  69                 );
  70                 return self::listPages( $dbr, $conds );
  71         }
  72
  73         protected static function listPages( $dbr, $condition ) {
  74                 return $dbr->resultObject(
  75                         $dbr->select(
  76                                 array( 'archive' ),
  77                                 array(
  78                                         'ar_namespace',
  79                                         'ar_title',
  80                                         'COUNT(*) AS count',
  81                                 ),
  82                                 $condition,
  83                                 __METHOD__,
  84                                 array(
  85                                         'GROUP BY' => 'ar_namespace,ar_title',
  86                                         'ORDER BY' => 'ar_namespace,ar_title',
  87                                         'LIMIT' => 100,
  88                                 )
  89                         )
  90                 );
  91         }
  92
  93         /**
  94          * List the revisions of the given page. Returns result wrapper with
  95          * (ar_minor_edit, ar_timestamp, ar_user, ar_user_text, ar_comment) fields.
  96          *
  97          * @return ResultWrapper
  98          */
  99         function listRevisions() {
 100                 $dbr = wfGetDB( DB_SLAVE );
 101                 $res = $dbr->select( 'archive',
 102                         array( 'ar_minor_edit', 'ar_timestamp', 'ar_user', 'ar_user_text', 'ar_comment', 'ar_len' ),
 103                         array( 'ar_namespace' => $this->title->getNamespace(),
 104                                'ar_title' => $this->title->getDBkey() ),
 105                         'PageArchive::listRevisions',
 106                         array( 'ORDER BY' => 'ar_timestamp DESC' ) );
 107                 $ret = $dbr->resultObject( $res );
 108                 return $ret;
 109         }
 110
 111         /**
 112          * List the deleted file revisions for this page, if it's a file page.
 113          * Returns a result wrapper with various filearchive fields, or null
 114          * if not a file page.
 115          *
 116          * @return ResultWrapper
 117          * @todo Does this belong in Image for fuller encapsulation?
 118          */
 119         function listFiles() {
 120                 if( $this->title->getNamespace() == NS_IMAGE ) {
 121                         $dbr = wfGetDB( DB_SLAVE );
 122                         $res = $dbr->select( 'filearchive',
 123                                 array(
 124                                         'fa_id',
 125                                         'fa_name',
 126                                         'fa_storage_key',
 127                                         'fa_size',
 128                                         'fa_width',
 129                                         'fa_height',
 130                                         'fa_description',
 131                                         'fa_user',
 132                                         'fa_user_text',
 133                                         'fa_timestamp' ),
 134                                 array( 'fa_name' => $this->title->getDbKey() ),
 135                                 __METHOD__,
 136                                 array( 'ORDER BY' => 'fa_timestamp DESC' ) );
 137                         $ret = $dbr->resultObject( $res );
 138                         return $ret;
 139                 }
 140                 return null;
 141         }
 142
 143         /**
 144          * Fetch (and decompress if necessary) the stored text for the deleted
 145          * revision of the page with the given timestamp.
 146          *
 147          * @return string
 148          * @deprecated Use getRevision() for more flexible information
 149          */
 150         function getRevisionText( $timestamp ) {
 151                 $rev = $this->getRevision( $timestamp );
 152                 return $rev ? $rev->getText() : null;
 153         }
 154
 155         /**
 156          * Return a Revision object containing data for the deleted revision.
 157          * Note that the result *may* or *may not* have a null page ID.
 158          * @param string $timestamp
 159          * @return Revision
 160          */
 161         function getRevision( $timestamp ) {
 162                 $dbr = wfGetDB( DB_SLAVE );
 163                 $row = $dbr->selectRow( 'archive',
 164                         array(
 165                                 'ar_rev_id',
 166                                 'ar_text',
 167                                 'ar_comment',
 168                                 'ar_user',
 169                                 'ar_user_text',
 170                                 'ar_timestamp',
 171                                 'ar_minor_edit',
 172                                 'ar_flags',
 173                                 'ar_text_id',
 174                                 'ar_len' ),
 175                         array( 'ar_namespace' => $this->title->getNamespace(),
 176                                'ar_title' => $this->title->getDbkey(),
 177                                'ar_timestamp' => $dbr->timestamp( $timestamp ) ),
 178                         __METHOD__ );
 179                 if( $row ) {
 180                         return new Revision( array(
 181                                 'page'       => $this->title->getArticleId(),
 182                                 'id'         => $row->ar_rev_id,
 183                                 'text'       => ($row->ar_text_id
 184                                         ? null
 185                                         : Revision::getRevisionText( $row, 'ar_' ) ),
 186                                 'comment'    => $row->ar_comment,
 187                                 'user'       => $row->ar_user,
 188                                 'user_text'  => $row->ar_user_text,
 189                                 'timestamp'  => $row->ar_timestamp,
 190                                 'minor_edit' => $row->ar_minor_edit,
 191                                 'text_id'    => $row->ar_text_id ) );
 192                 } else {
 193                         return null;
 194                 }
 195         }
 196
 197         /**
 198          * Get the text from an archive row containing ar_text, ar_flags and ar_text_id
 199          */
 200         function getTextFromRow( $row ) {
 201                 if( is_null( $row->ar_text_id ) ) {
 202                         // An old row from MediaWiki 1.4 or previous.
 203                         // Text is embedded in this row in classic compression format.
 204                         return Revision::getRevisionText( $row, "ar_" );
 205                 } else {
 206                         // New-style: keyed to the text storage backend.
 207                         $dbr = wfGetDB( DB_SLAVE );
 208                         $text = $dbr->selectRow( 'text',
 209                                 array( 'old_text', 'old_flags' ),
 210                                 array( 'old_id' => $row->ar_text_id ),
 211                                 __METHOD__ );
 212                         return Revision::getRevisionText( $text );
 213                 }
 214         }
 215
 216
 217         /**
 218          * Fetch (and decompress if necessary) the stored text of the most
 219          * recently edited deleted revision of the page.
 220          *
 221          * If there are no archived revisions for the page, returns NULL.
 222          *
 223          * @return string
 224          */
 225         function getLastRevisionText() {
 226                 $dbr = wfGetDB( DB_SLAVE );
 227                 $row = $dbr->selectRow( 'archive',
 228                         array( 'ar_text', 'ar_flags', 'ar_text_id' ),
 229                         array( 'ar_namespace' => $this->title->getNamespace(),
 230                                'ar_title' => $this->title->getDBkey() ),
 231                         'PageArchive::getLastRevisionText',
 232                         array( 'ORDER BY' => 'ar_timestamp DESC' ) );
 233                 if( $row ) {
 234                         return $this->getTextFromRow( $row );
 235                 } else {
 236                         return NULL;
 237                 }
 238         }
 239
 240         /**
 241          * Quick check if any archived revisions are present for the page.
 242          * @return bool
 243          */
 244         function isDeleted() {
 245                 $dbr = wfGetDB( DB_SLAVE );
 246                 $n = $dbr->selectField( 'archive', 'COUNT(ar_title)',
 247                         array( 'ar_namespace' => $this->title->getNamespace(),
 248                                'ar_title' => $this->title->getDBkey() ) );
 249                 return ($n > 0);
 250         }
 251
 252         /**
 253          * Restore the given (or all) text and file revisions for the page.
 254          * Once restored, the items will be removed from the archive tables.
 255          * The deletion log will be updated with an undeletion notice.
 256          *
 257          * @param array $timestamps Pass an empty array to restore all revisions, otherwise list the ones to undelete.
 258          * @param string $comment
 259          * @param array $fileVersions
 260          *
 261          * @return true on success.
 262          */
 263         function undelete( $timestamps, $comment = '', $fileVersions = array() ) {
 264                 // If both the set of text revisions and file revisions are empty,
 265                 // restore everything. Otherwise, just restore the requested items.
 266                 $restoreAll = empty( $timestamps ) && empty( $fileVersions );
 267
 268                 $restoreText = $restoreAll || !empty( $timestamps );
 269                 $restoreFiles = $restoreAll || !empty( $fileVersions );
 270
 271                 if( $restoreFiles && $this->title->getNamespace() == NS_IMAGE ) {
 272                         $img = new Image( $this->title );
 273                         $filesRestored = $img->restore( $fileVersions );
 274                 } else {
 275                         $filesRestored = 0;
 276                 }
 277
 278                 if( $restoreText ) {
 279                         $textRestored = $this->undeleteRevisions( $timestamps );
 280                 } else {
 281                         $textRestored = 0;
 282                 }
 283
 284                 // Touch the log!
 285                 global $wgContLang;
 286                 $log = new LogPage( 'delete' );
 287
 288                 if( $textRestored && $filesRestored ) {
 289                         $reason = wfMsgForContent( 'undeletedrevisions-files',
 290                                 $wgContLang->formatNum( $textRestored ),
 291                                 $wgContLang->formatNum( $filesRestored ) );
 292                 } elseif( $textRestored ) {
 293                         $reason = wfMsgForContent( 'undeletedrevisions',
 294                                 $wgContLang->formatNum( $textRestored ) );
 295                 } elseif( $filesRestored ) {
 296                         $reason = wfMsgForContent( 'undeletedfiles',
 297                                 $wgContLang->formatNum( $filesRestored ) );
 298                 } else {
 299                         wfDebug( "Undelete: nothing undeleted...\n" );
 300                         return false;
 301                 }
 302
 303                 if( trim( $comment ) != '' )
 304                         $reason .= ": {$comment}";
 305                 $log->addEntry( 'restore', $this->title, $reason );
 306
 307                 return true;
 308         }
 309
 310         /**
 311          * This is the meaty bit -- restores archived revisions of the given page
 312          * to the cur/old tables. If the page currently exists, all revisions will
 313          * be stuffed into old, otherwise the most recent will go into cur.
 314          *
 315          * @param array $timestamps Pass an empty array to restore all revisions, otherwise list the ones to undelete.
 316          * @param string $comment
 317          * @param array $fileVersions
 318          *
 319          * @return int number of revisions restored
 320          */
 321         private function undeleteRevisions( $timestamps ) {
 322                 $restoreAll = empty( $timestamps );
 323
 324                 $dbw = wfGetDB( DB_MASTER );
 325                 $page = $dbw->tableName( 'archive' );
 326
 327                 # Does this page already exist? We'll have to update it...
 328                 $article = new Article( $this->title );
 329                 $options = 'FOR UPDATE';
 330                 $page = $dbw->selectRow( 'page',
 331                         array( 'page_id', 'page_latest' ),
 332                         array( 'page_namespace' => $this->title->getNamespace(),
 333                                'page_title'     => $this->title->getDBkey() ),
 334                         __METHOD__,
 335                         $options );
 336                 if( $page ) {
 337                         # Page already exists. Import the history, and if necessary
 338                         # we'll update the latest revision field in the record.
 339                         $newid             = 0;
 340                         $pageId            = $page->page_id;
 341                         $previousRevId     = $page->page_latest;
 342                 } else {
 343                         # Have to create a new article...
 344                         $newid  = $article->insertOn( $dbw );
 345                         $pageId = $newid;
 346                         $previousRevId = 0;
 347                 }
 348
 349                 if( $restoreAll ) {
 350                         $oldones = '1 = 1'; # All revisions...
 351                 } else {
 352                         $oldts = implode( ',',
 353                                 array_map( array( &$dbw, 'addQuotes' ),
 354                                         array_map( array( &$dbw, 'timestamp' ),
 355                                                 $timestamps ) ) );
 356
 357                         $oldones = "ar_timestamp IN ( {$oldts} )";
 358                 }
 359
 360                 /**
 361                  * Restore each revision...
 362                  */
 363                 $result = $dbw->select( 'archive',
 364                         /* fields */ array(
 365                                 'ar_rev_id',
 366                                 'ar_text',
 367                                 'ar_comment',
 368                                 'ar_user',
 369                                 'ar_user_text',
 370                                 'ar_timestamp',
 371                                 'ar_minor_edit',
 372                                 'ar_flags',
 373                                 'ar_text_id',
 374                                 'ar_len' ),
 375                         /* WHERE */ array(
 376                                 'ar_namespace' => $this->title->getNamespace(),
 377                                 'ar_title'     => $this->title->getDBkey(),
 378                                 $oldones ),
 379                         __METHOD__,
 380                         /* options */ array(
 381                                 'ORDER BY' => 'ar_timestamp' )
 382                         );
 383                 if( $dbw->numRows( $result ) < count( $timestamps ) ) {
 384                         wfDebug( __METHOD__.": couldn't find all requested rows\n" );
 385                         return false;
 386                 }
 387
 388                 $revision = null;
 389                 $restored = 0;
 390
 391                 while( $row = $dbw->fetchObject( $result ) ) {
 392                         if( $row->ar_text_id ) {
 393                                 // Revision was deleted in 1.5+; text is in
 394                                 // the regular text table, use the reference.
 395                                 // Specify null here so the so the text is
 396                                 // dereferenced for page length info if needed.
 397                                 $revText = null;
 398                         } else {
 399                                 // Revision was deleted in 1.4 or earlier.
 400                                 // Text is squashed into the archive row, and
 401                                 // a new text table entry will be created for it.
 402                                 $revText = Revision::getRevisionText( $row, 'ar_' );
 403                         }
 404                         $revision = new Revision( array(
 405                                 'page'       => $pageId,
 406                                 'id'         => $row->ar_rev_id,
 407                                 'text'       => $revText,
 408                                 'comment'    => $row->ar_comment,
 409                                 'user'       => $row->ar_user,
 410                                 'user_text'  => $row->ar_user_text,
 411                                 'timestamp'  => $row->ar_timestamp,
 412                                 'minor_edit' => $row->ar_minor_edit,
 413                                 'text_id'    => $row->ar_text_id,
 414                                 'len'            => $row->ar_len
 415                                 ) );
 416                         $revision->insertOn( $dbw );
 417                         $restored++;
 418                 }
 419
 420                 if( $revision ) {
 421                         // Attach the latest revision to the page...
 422                         $wasnew = $article->updateIfNewerOn( $dbw, $revision, $previousRevId );
 423
 424                         if( $newid || $wasnew ) {
 425                                 // Update site stats, link tables, etc
 426                                 $article->createUpdates( $revision );
 427                         }
 428
 429                         if( $newid ) {
 430                                 wfRunHooks( 'ArticleUndelete', array( &$this->title, true ) );
 431                                 Article::onArticleCreate( $this->title );
 432                         } else {
 433                                 wfRunHooks( 'ArticleUndelete', array( &$this->title, false ) );
 434                                 Article::onArticleEdit( $this->title );
 435                         }
 436                 } else {
 437                         # Something went terribly wrong!
 438                 }
 439
 440                 # Now that it's safely stored, take it out of the archive
 441                 $dbw->delete( 'archive',
 442                         /* WHERE */ array(
 443                                 'ar_namespace' => $this->title->getNamespace(),
 444                                 'ar_title' => $this->title->getDBkey(),
 445                                 $oldones ),
 446                         __METHOD__ );
 447
 448                 return $restored;
 449         }
 450
 451 }
 452
 453 /**
 454  * The HTML form for Special:Undelete, which allows users with the appropriate
 455  * permissions to view and restore deleted content.
 456  * @addtogroup SpecialPage
 457  */
 458 class UndeleteForm {
 459         var $mAction, $mTarget, $mTimestamp, $mRestore, $mTargetObj;
 460         var $mTargetTimestamp, $mAllowed, $mComment;
 461
 462         function UndeleteForm( $request, $par = "" ) {
 463                 global $wgUser;
 464                 $this->mAction = $request->getVal( 'action' );
 465                 $this->mTarget = $request->getVal( 'target' );
 466                 $this->mSearchPrefix = $request->getText( 'prefix' );
 467                 $time = $request->getVal( 'timestamp' );
 468                 $this->mTimestamp = $time ? wfTimestamp( TS_MW, $time ) : '';
 469                 $this->mFile = $request->getVal( 'file' );
 470
 471                 $posted = $request->wasPosted() &&
 472                         $wgUser->matchEditToken( $request->getVal( 'wpEditToken' ) );
 473                 $this->mRestore = $request->getCheck( 'restore' ) && $posted;
 474                 $this->mPreview = $request->getCheck( 'preview' ) && $posted;
 475                 $this->mComment = $request->getText( 'wpComment' );
 476
 477                 if( $par != "" ) {
 478                         $this->mTarget = $par;
 479                 }
 480                 if ( $wgUser->isAllowed( 'delete' ) && !$wgUser->isBlocked() ) {
 481                         $this->mAllowed = true;
 482                 } else {
 483                         $this->mAllowed = false;
 484                         $this->mTimestamp = '';
 485                         $this->mRestore = false;
 486                 }
 487                 if ( $this->mTarget !== "" ) {
 488                         $this->mTargetObj = Title::newFromURL( $this->mTarget );
 489                 } else {
 490                         $this->mTargetObj = NULL;
 491                 }
 492                 if( $this->mRestore ) {
 493                         $timestamps = array();
 494                         $this->mFileVersions = array();
 495                         foreach( $_REQUEST as $key => $val ) {
 496                                 $matches = array();
 497                                 if( preg_match( '/^ts(\d{14})$/', $key, $matches ) ) {
 498                                         array_push( $timestamps, $matches[1] );
 499                                 }
 500
 501                                 if( preg_match( '/^fileid(\d+)$/', $key, $matches ) ) {
 502                                         $this->mFileVersions[] = intval( $matches[1] );
 503                                 }
 504                         }
 505                         rsort( $timestamps );
 506                         $this->mTargetTimestamp = $timestamps;
 507                 }
 508         }
 509
 510         function execute() {
 511                 global $wgOut;
 512                 if ( $this->mAllowed ) {
 513                         $wgOut->setPagetitle( wfMsg( "undeletepage" ) );
 514                 } else {
 515                         $wgOut->setPagetitle( wfMsg( "viewdeletedpage" ) );
 516                 }
 517
 518                 if( is_null( $this->mTargetObj ) ) {
 519                         $this->showSearchForm();
 520
 521                         # List undeletable articles
 522                         if( $this->mSearchPrefix ) {
 523                                 $result = PageArchive::listPagesByPrefix(
 524                                         $this->mSearchPrefix );
 525                                 $this->showList( $result );
 526                         }
 527                         return;
 528                 }
 529                 if( $this->mTimestamp !== '' ) {
 530                         return $this->showRevision( $this->mTimestamp );
 531                 }
 532                 if( $this->mFile !== null ) {
 533                         return $this->showFile( $this->mFile );
 534                 }
 535                 if( $this->mRestore && $this->mAction == "submit" ) {
 536                         return $this->undelete();
 537                 }
 538                 return $this->showHistory();
 539         }
 540
 541         function showSearchForm() {
 542                 global $wgOut, $wgScript;
 543                 $wgOut->addWikiText( wfMsg( 'undelete-header' ) );
 544
 545                 $wgOut->addHtml(
 546                         Xml::openElement( 'form', array(
 547                                 'method' => 'get',
 548                                 'action' => $wgScript ) ) .
 549                         '<fieldset>' .
 550                         Xml::element( 'legend', array(),
 551                                 wfMsg( 'undelete-search-box' ) ) .
 552                         Xml::hidden( 'title',
 553                                 SpecialPage::getTitleFor( 'Undelete' )->getPrefixedDbKey() ) .
 554                         Xml::inputLabel( wfMsg( 'undelete-search-prefix' ),
 555                                 'prefix', 'prefix', 20,
 556                                 $this->mSearchPrefix ) .
 557                         Xml::submitButton( wfMsg( 'undelete-search-submit' ) ) .
 558                         '</fieldset>' .
 559                         '</form>' );
 560         }
 561
 562         /* private */ function showList( $result ) {
 563                 global $wgLang, $wgContLang, $wgUser, $wgOut;
 564
 565                 if( $result->numRows() == 0 ) {
 566                         $wgOut->addWikiText( wfMsg( 'undelete-no-results' ) );
 567                         return;
 568                 }
 569
 570                 $wgOut->addWikiText( wfMsg( "undeletepagetext" ) );
 571
 572                 $sk = $wgUser->getSkin();
 573                 $undelete = SpecialPage::getTitleFor( 'Undelete' );
 574                 $wgOut->addHTML( "<ul>\n" );
 575                 while( $row = $result->fetchObject() ) {
 576                         $title = Title::makeTitleSafe( $row->ar_namespace, $row->ar_title );
 577                         $link = $sk->makeKnownLinkObj( $undelete, htmlspecialchars( $title->getPrefixedText() ), 'target=' . $title->getPrefixedUrl() );
 578                         #$revs = wfMsgHtml( 'undeleterevisions', $wgLang->formatNum( $row->count ) );
 579                         $revs = wfMsgExt( 'undeleterevisions',
 580                                 array( 'parseinline' ),
 581                                 $wgLang->formatNum( $row->count ) );
 582                         $wgOut->addHtml( "<li>{$link} ({$revs})</li>\n" );
 583                 }
 584                 $result->free();
 585                 $wgOut->addHTML( "</ul>\n" );
 586
 587                 return true;
 588         }
 589
 590         /* private */ function showRevision( $timestamp ) {
 591                 global $wgLang, $wgUser, $wgOut;
 592                 $self = SpecialPage::getTitleFor( 'Undelete' );
 593                 $skin = $wgUser->getSkin();
 594
 595                 if(!preg_match("/[0-9]{14}/",$timestamp)) return 0;
 596
 597                 $archive = new PageArchive( $this->mTargetObj );
 598                 $rev = $archive->getRevision( $timestamp );
 599
 600                 $wgOut->setPageTitle( wfMsg( 'undeletepage' ) );
 601                 $link = $skin->makeKnownLinkObj( $self, htmlspecialchars( $this->mTargetObj->getPrefixedText() ),
 602                                         'target=' . $this->mTargetObj->getPrefixedUrl() );
 603                 $wgOut->addHtml( '<p>' . wfMsgHtml( 'undelete-revision', $link,
 604                         htmlspecialchars( $wgLang->timeAndDate( $timestamp ) ) ) . '</p>' );
 605
 606                 if( !$rev ) {
 607                         $wgOut->addWikiText( wfMsg( 'undeleterevision-missing' ) );
 608                         return;
 609                 }
 610
 611                 wfRunHooks( 'UndeleteShowRevision', array( $this->mTargetObj, $rev ) );
 612
 613                 if( $this->mPreview ) {
 614                         $wgOut->addHtml( "<hr />\n" );
 615                         $wgOut->addWikiTextTitleTidy( $rev->getText(), $this->mTargetObj, false );
 616                 }
 617
 618                 $wgOut->addHtml(
 619                         wfElement( 'textarea', array(
 620                                         'readonly' => true,
 621                                         'cols' => intval( $wgUser->getOption( 'cols' ) ),
 622                                         'rows' => intval( $wgUser->getOption( 'rows' ) ) ),
 623                                 $rev->getText() . "\n" ) .
 624                         wfOpenElement( 'div' ) .
 625                         wfOpenElement( 'form', array(
 626                                 'method' => 'post',
 627                                 'action' => $self->getLocalURL( "action=submit" ) ) ) .
 628                         wfElement( 'input', array(
 629                                 'type' => 'hidden',
 630                                 'name' => 'target',
 631                                 'value' => $this->mTargetObj->getPrefixedDbKey() ) ) .
 632                         wfElement( 'input', array(
 633                                 'type' => 'hidden',
 634                                 'name' => 'timestamp',
 635                                 'value' => $timestamp ) ) .
 636                         wfElement( 'input', array(
 637                                 'type' => 'hidden',
 638                                 'name' => 'wpEditToken',
 639                                 'value' => $wgUser->editToken() ) ) .
 640                         wfElement( 'input', array(
 641                                 'type' => 'hidden',
 642                                 'name' => 'preview',
 643                                 'value' => '1' ) ) .
 644                         wfElement( 'input', array(
 645                                 'type' => 'submit',
 646                                 'value' => wfMsg( 'showpreview' ) ) ) .
 647                         wfCloseElement( 'form' ) .
 648                         wfCloseElement( 'div' ) );
 649         }
 650
 651         /**
 652          * Show a deleted file version requested by the visitor.
 653          */
 654         function showFile( $key ) {
 655                 global $wgOut, $wgRequest;
 656                 $wgOut->disable();
 657
 658                 # We mustn't allow the output to be Squid cached, otherwise
 659                 # if an admin previews a deleted image, and it's cached, then
 660                 # a user without appropriate permissions can toddle off and
 661                 # nab the image, and Squid will serve it
 662                 $wgRequest->response()->header( 'Expires: ' . gmdate( 'D, d M Y H:i:s', 0 ) . ' GMT' );
 663                 $wgRequest->response()->header( 'Cache-Control: no-cache, no-store, max-age=0, must-revalidate' );
 664                 $wgRequest->response()->header( 'Pragma: no-cache' );
 665
 666                 $store = FileStore::get( 'deleted' );
 667                 $store->stream( $key );
 668         }
 669
 670         /* private */ function showHistory() {
 671                 global $wgLang, $wgUser, $wgOut;
 672
 673                 $sk = $wgUser->getSkin();
 674                 if ( $this->mAllowed ) {
 675                         $wgOut->setPagetitle( wfMsg( "undeletepage" ) );
 676                 } else {
 677                         $wgOut->setPagetitle( wfMsg( 'viewdeletedpage' ) );
 678                 }
 679
 680                 $archive = new PageArchive( $this->mTargetObj );
 681                 /*
 682                 $text = $archive->getLastRevisionText();
 683                 if( is_null( $text ) ) {
 684                         $wgOut->addWikiText( wfMsg( "nohistory" ) );
 685                         return;
 686                 }
 687                 */
 688                 if ( $this->mAllowed ) {
 689                         $wgOut->addWikiText( wfMsg( "undeletehistory" ) );
 690                 } else {
 691                         $wgOut->addWikiText( wfMsg( "undeletehistorynoadmin" ) );
 692                 }
 693
 694                 # List all stored revisions
 695                 $revisions = $archive->listRevisions();
 696                 $files = $archive->listFiles();
 697
 698                 $haveRevisions = $revisions && $revisions->numRows() > 0;
 699                 $haveFiles = $files && $files->numRows() > 0;
 700
 701                 # Batch existence check on user and talk pages
 702                 if( $haveRevisions ) {
 703                         $batch = new LinkBatch();
 704                         while( $row = $revisions->fetchObject() ) {
 705                                 $batch->addObj( Title::makeTitleSafe( NS_USER, $row->ar_user_text ) );
 706                                 $batch->addObj( Title::makeTitleSafe( NS_USER_TALK, $row->ar_user_text ) );
 707                         }
 708                         $batch->execute();
 709                         $revisions->seek( 0 );
 710                 }
 711                 if( $haveFiles ) {
 712                         $batch = new LinkBatch();
 713                         while( $row = $files->fetchObject() ) {
 714                                 $batch->addObj( Title::makeTitleSafe( NS_USER, $row->fa_user_text ) );
 715                                 $batch->addObj( Title::makeTitleSafe( NS_USER_TALK, $row->fa_user_text ) );
 716                         }
 717                         $batch->execute();
 718                         $files->seek( 0 );
 719                 }
 720
 721                 if ( $this->mAllowed ) {
 722                         $titleObj = SpecialPage::getTitleFor( "Undelete" );
 723                         $action = $titleObj->getLocalURL( "action=submit" );
 724                         # Start the form here
 725                         $top = wfOpenElement( 'form', array( 'method' => 'post', 'action' => $action, 'id' => 'undelete' ) );
 726                         $wgOut->addHtml( $top );
 727                 }
 728
 729                 # Show relevant lines from the deletion log:
 730                 $wgOut->addHTML( "<h2>" . htmlspecialchars( LogPage::logName( 'delete' ) ) . "</h2>\n" );
 731                 $logViewer = new LogViewer(
 732                         new LogReader(
 733                                 new FauxRequest(
 734                                         array( 'page' => $this->mTargetObj->getPrefixedText(),
 735                                                    'type' => 'delete' ) ) ) );
 736                 $logViewer->showList( $wgOut );
 737
 738                 if( $this->mAllowed && ( $haveRevisions || $haveFiles ) ) {
 739                         # Format the user-visible controls (comment field, submission button)
 740                         # in a nice little table
 741                         $table = '<fieldset><table><tr>';
 742                         $table .= '<td colspan="2">' . wfMsgWikiHtml( 'undeleteextrahelp' ) . '</td></tr><tr>';
 743                         $table .= '<td align="right"><strong>' . wfMsgHtml( 'undeletecomment' ) . '</strong></td>';
 744                         $table .= '<td>' . wfInput( 'wpComment', 50, $this->mComment ) . '</td>';
 745                         $table .= '</tr><tr><td>&nbsp;</td><td>';
 746                         $table .= wfSubmitButton( wfMsg( 'undeletebtn' ), array( 'name' => 'restore' ) );
 747                         $table .= wfElement( 'input', array( 'type' => 'reset', 'value' => wfMsg( 'undeletereset' ) ) );
 748                         $table .= '</td></tr></table></fieldset>';
 749                         $wgOut->addHtml( $table );
 750                 }
 751
 752                 $wgOut->addHTML( "<h2>" . htmlspecialchars( wfMsg( "history" ) ) . "</h2>\n" );
 753
 754                 if( $haveRevisions ) {
 755                         # The page's stored (deleted) history:
 756                         $wgOut->addHTML("<ul>");
 757                         $target = urlencode( $this->mTarget );
 758                         while( $row = $revisions->fetchObject() ) {
 759                                 $ts = wfTimestamp( TS_MW, $row->ar_timestamp );
 760                                 if ( $this->mAllowed ) {
 761                                         $checkBox = wfCheck( "ts$ts" );
 762                                         $pageLink = $sk->makeKnownLinkObj( $titleObj,
 763                                                 $wgLang->timeanddate( $ts, true ),
 764                                                 "target=$target&timestamp=$ts" );
 765                                 } else {
 766                                         $checkBox = '';
 767                                         $pageLink = $wgLang->timeanddate( $ts, true );
 768                                 }
 769                                 $userLink = $sk->userLink( $row->ar_user, $row->ar_user_text ) . $sk->userToolLinks( $row->ar_user, $row->ar_user_text );
 770                                 $stxt = '';
 771                                 if (!is_null($size = $row->ar_len)) {
 772                                         if ($size == 0) {
 773                                                 $stxt = wfMsgHtml('historyempty');
 774                                         } else {
 775                                                 $stxt = wfMsgHtml('historysize', $wgLang->formatNum( $size ) );
 776                                         }
 777                                 }
 778                                 $comment = $sk->commentBlock( $row->ar_comment );
 779                                 $wgOut->addHTML( "<li>$checkBox $pageLink . . $userLink $stxt $comment</li>\n" );
 780
 781                         }
 782                         $revisions->free();
 783                         $wgOut->addHTML("</ul>");
 784                 } else {
 785                         $wgOut->addWikiText( wfMsg( "nohistory" ) );
 786                 }
 787
 788
 789                 if( $haveFiles ) {
 790                         $wgOut->addHtml( "<h2>" . wfMsgHtml( 'imghistory' ) . "</h2>\n" );
 791                         $wgOut->addHtml( "<ul>" );
 792                         while( $row = $files->fetchObject() ) {
 793                                 $ts = wfTimestamp( TS_MW, $row->fa_timestamp );
 794                                 if ( $this->mAllowed && $row->fa_storage_key ) {
 795                                         $checkBox = wfCheck( "fileid" . $row->fa_id );
 796                                         $key = urlencode( $row->fa_storage_key );
 797                                         $target = urlencode( $this->mTarget );
 798                                         $pageLink = $sk->makeKnownLinkObj( $titleObj,
 799                                                 $wgLang->timeanddate( $ts, true ),
 800                                                 "target=$target&file=$key" );
 801                                 } else {
 802                                         $checkBox = '';
 803                                         $pageLink = $wgLang->timeanddate( $ts, true );
 804                                 }
 805                                 $userLink = $sk->userLink( $row->fa_user, $row->fa_user_text ) . $sk->userToolLinks( $row->fa_user, $row->fa_user_text );
 806                                 $data =
 807                                         wfMsgHtml( 'widthheight',
 808                                                 $wgLang->formatNum( $row->fa_width ),
 809                                                 $wgLang->formatNum( $row->fa_height ) ) .
 810                                         ' (' .
 811                                         wfMsgHtml( 'nbytes', $wgLang->formatNum( $row->fa_size ) ) .
 812                                         ')';
 813                                 $comment = $sk->commentBlock( $row->fa_description );
 814                                 $wgOut->addHTML( "<li>$checkBox $pageLink . . $userLink $data $comment</li>\n" );
 815                         }
 816                         $files->free();
 817                         $wgOut->addHTML( "</ul>" );
 818                 }
 819
 820                 if ( $this->mAllowed ) {
 821                         # Slip in the hidden controls here
 822                         $misc  = wfHidden( 'target', $this->mTarget );
 823                         $misc .= wfHidden( 'wpEditToken', $wgUser->editToken() );
 824                         $wgOut->addHtml( $misc . '</form>' );
 825                 }
 826
 827                 return true;
 828         }
 829
 830         function undelete() {
 831                 global $wgOut, $wgUser;
 832                 if( !is_null( $this->mTargetObj ) ) {
 833                         $archive = new PageArchive( $this->mTargetObj );
 834
 835                         $ok = $archive->undelete(
 836                                 $this->mTargetTimestamp,
 837                                 $this->mComment,
 838                                 $this->mFileVersions );
 839
 840                         if( $ok ) {
 841                                 $skin = $wgUser->getSkin();
 842                                 $link = $skin->makeKnownLinkObj( $this->mTargetObj );
 843                                 $wgOut->addHtml( wfMsgWikiHtml( 'undeletedpage', $link ) );
 844                                 return true;
 845                         }
 846                 }
 847                 $wgOut->showFatalError( wfMsg( "cannotundelete" ) );
 848                 return false;
 849         }
 850 }
 851
 852 ?>