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         var $fileStatus;
  27
  28         function __construct( $title ) {
  29                 if( is_null( $title ) ) {
  30                         throw new MWException( 'Archiver() given a null title.');
  31                 }
  32                 $this->title = $title;
  33         }
  34
  35         /**
  36          * List all deleted pages recorded in the archive table. Returns result
  37          * wrapper with (ar_namespace, ar_title, count) fields, ordered by page
  38          * namespace/title.
  39          *
  40          * @return ResultWrapper
  41          */
  42         public static function listAllPages() {
  43                 $dbr = wfGetDB( DB_SLAVE );
  44                 return self::listPages( $dbr, '' );
  45         }
  46
  47         /**
  48          * List deleted pages recorded in the archive table matching the
  49          * given title prefix.
  50          * Returns result wrapper with (ar_namespace, ar_title, count) fields.
  51          *
  52          * @return ResultWrapper
  53          */
  54         public static function listPagesByPrefix( $prefix ) {
  55                 $dbr = wfGetDB( DB_SLAVE );
  56
  57                 $title = Title::newFromText( $prefix );
  58                 if( $title ) {
  59                         $ns = $title->getNamespace();
  60                         $encPrefix = $dbr->escapeLike( $title->getDbKey() );
  61                 } else {
  62                         // Prolly won't work too good
  63                         // @todo handle bare namespace names cleanly?
  64                         $ns = 0;
  65                         $encPrefix = $dbr->escapeLike( $prefix );
  66                 }
  67                 $conds = array(
  68                         'ar_namespace' => $ns,
  69                         "ar_title LIKE '$encPrefix%'",
  70                 );
  71                 return self::listPages( $dbr, $conds );
  72         }
  73
  74         protected static function listPages( $dbr, $condition ) {
  75                 return $dbr->resultObject(
  76                         $dbr->select(
  77                                 array( 'archive' ),
  78                                 array(
  79                                         'ar_namespace',
  80                                         'ar_title',
  81                                         'COUNT(*) AS count',
  82                                 ),
  83                                 $condition,
  84                                 __METHOD__,
  85                                 array(
  86                                         'GROUP BY' => 'ar_namespace,ar_title',
  87                                         'ORDER BY' => 'ar_namespace,ar_title',
  88                                         'LIMIT' => 100,
  89                                 )
  90                         )
  91                 );
  92         }
  93
  94         /**
  95          * List the revisions of the given page. Returns result wrapper with
  96          * (ar_minor_edit, ar_timestamp, ar_user, ar_user_text, ar_comment) fields.
  97          *
  98          * @return ResultWrapper
  99          */
 100         function listRevisions() {
 101                 $dbr = wfGetDB( DB_SLAVE );
 102                 $res = $dbr->select( 'archive',
 103                         array( 'ar_minor_edit', 'ar_timestamp', 'ar_user', 'ar_user_text', 'ar_comment', 'ar_len' ),
 104                         array( 'ar_namespace' => $this->title->getNamespace(),
 105                                'ar_title' => $this->title->getDBkey() ),
 106                         'PageArchive::listRevisions',
 107                         array( 'ORDER BY' => 'ar_timestamp DESC' ) );
 108                 $ret = $dbr->resultObject( $res );
 109                 return $ret;
 110         }
 111
 112         /**
 113          * List the deleted file revisions for this page, if it's a file page.
 114          * Returns a result wrapper with various filearchive fields, or null
 115          * if not a file page.
 116          *
 117          * @return ResultWrapper
 118          * @todo Does this belong in Image for fuller encapsulation?
 119          */
 120         function listFiles() {
 121                 if( $this->title->getNamespace() == NS_IMAGE ) {
 122                         $dbr = wfGetDB( DB_SLAVE );
 123                         $res = $dbr->select( 'filearchive',
 124                                 array(
 125                                         'fa_id',
 126                                         'fa_name',
 127                                         'fa_storage_key',
 128                                         'fa_size',
 129                                         'fa_width',
 130                                         'fa_height',
 131                                         'fa_description',
 132                                         'fa_user',
 133                                         'fa_user_text',
 134                                         'fa_timestamp' ),
 135                                 array( 'fa_name' => $this->title->getDbKey() ),
 136                                 __METHOD__,
 137                                 array( 'ORDER BY' => 'fa_timestamp DESC' ) );
 138                         $ret = $dbr->resultObject( $res );
 139                         return $ret;
 140                 }
 141                 return null;
 142         }
 143
 144         /**
 145          * Fetch (and decompress if necessary) the stored text for the deleted
 146          * revision of the page with the given timestamp.
 147          *
 148          * @return string
 149          * @deprecated Use getRevision() for more flexible information
 150          */
 151         function getRevisionText( $timestamp ) {
 152                 $rev = $this->getRevision( $timestamp );
 153                 return $rev ? $rev->getText() : null;
 154         }
 155
 156         /**
 157          * Return a Revision object containing data for the deleted revision.
 158          * Note that the result *may* or *may not* have a null page ID.
 159          * @param string $timestamp
 160          * @return Revision
 161          */
 162         function getRevision( $timestamp ) {
 163                 $dbr = wfGetDB( DB_SLAVE );
 164                 $row = $dbr->selectRow( 'archive',
 165                         array(
 166                                 'ar_rev_id',
 167                                 'ar_text',
 168                                 'ar_comment',
 169                                 'ar_user',
 170                                 'ar_user_text',
 171                                 'ar_timestamp',
 172                                 'ar_minor_edit',
 173                                 'ar_flags',
 174                                 'ar_text_id',
 175                                 'ar_len' ),
 176                         array( 'ar_namespace' => $this->title->getNamespace(),
 177                                'ar_title' => $this->title->getDbkey(),
 178                                'ar_timestamp' => $dbr->timestamp( $timestamp ) ),
 179                         __METHOD__ );
 180                 if( $row ) {
 181                         return new Revision( array(
 182                                 'page'       => $this->title->getArticleId(),
 183                                 'id'         => $row->ar_rev_id,
 184                                 'text'       => ($row->ar_text_id
 185                                         ? null
 186                                         : Revision::getRevisionText( $row, 'ar_' ) ),
 187                                 'comment'    => $row->ar_comment,
 188                                 'user'       => $row->ar_user,
 189                                 'user_text'  => $row->ar_user_text,
 190                                 'timestamp'  => $row->ar_timestamp,
 191                                 'minor_edit' => $row->ar_minor_edit,
 192                                 'text_id'    => $row->ar_text_id ) );
 193                 } else {
 194                         return null;
 195                 }
 196         }
 197
 198         /**
 199          * Get the text from an archive row containing ar_text, ar_flags and ar_text_id
 200          */
 201         function getTextFromRow( $row ) {
 202                 if( is_null( $row->ar_text_id ) ) {
 203                         // An old row from MediaWiki 1.4 or previous.
 204                         // Text is embedded in this row in classic compression format.
 205                         return Revision::getRevisionText( $row, "ar_" );
 206                 } else {
 207                         // New-style: keyed to the text storage backend.
 208                         $dbr = wfGetDB( DB_SLAVE );
 209                         $text = $dbr->selectRow( 'text',
 210                                 array( 'old_text', 'old_flags' ),
 211                                 array( 'old_id' => $row->ar_text_id ),
 212                                 __METHOD__ );
 213                         return Revision::getRevisionText( $text );
 214                 }
 215         }
 216
 217
 218         /**
 219          * Fetch (and decompress if necessary) the stored text of the most
 220          * recently edited deleted revision of the page.
 221          *
 222          * If there are no archived revisions for the page, returns NULL.
 223          *
 224          * @return string
 225          */
 226         function getLastRevisionText() {
 227                 $dbr = wfGetDB( DB_SLAVE );
 228                 $row = $dbr->selectRow( 'archive',
 229                         array( 'ar_text', 'ar_flags', 'ar_text_id' ),
 230                         array( 'ar_namespace' => $this->title->getNamespace(),
 231                                'ar_title' => $this->title->getDBkey() ),
 232                         'PageArchive::getLastRevisionText',
 233                         array( 'ORDER BY' => 'ar_timestamp DESC' ) );
 234                 if( $row ) {
 235                         return $this->getTextFromRow( $row );
 236                 } else {
 237                         return NULL;
 238                 }
 239         }
 240
 241         /**
 242          * Quick check if any archived revisions are present for the page.
 243          * @return bool
 244          */
 245         function isDeleted() {
 246                 $dbr = wfGetDB( DB_SLAVE );
 247                 $n = $dbr->selectField( 'archive', 'COUNT(ar_title)',
 248                         array( 'ar_namespace' => $this->title->getNamespace(),
 249                                'ar_title' => $this->title->getDBkey() ) );
 250                 return ($n > 0);
 251         }
 252
 253         /**
 254          * Restore the given (or all) text and file revisions for the page.
 255          * Once restored, the items will be removed from the archive tables.
 256          * The deletion log will be updated with an undeletion notice.
 257          *
 258          * @param array $timestamps Pass an empty array to restore all revisions, otherwise list the ones to undelete.
 259          * @param string $comment
 260          * @param array $fileVersions
 261          *
 262          * @return true on success.
 263          */
 264         function undelete( $timestamps, $comment = '', $fileVersions = array() ) {
 265                 // If both the set of text revisions and file revisions are empty,
 266                 // restore everything. Otherwise, just restore the requested items.
 267                 $restoreAll = empty( $timestamps ) && empty( $fileVersions );
 268
 269                 $restoreText = $restoreAll || !empty( $timestamps );
 270                 $restoreFiles = $restoreAll || !empty( $fileVersions );
 271
 272                 if( $restoreFiles && $this->title->getNamespace() == NS_IMAGE ) {
 273                         $img = wfLocalFile( $this->title );
 274                         $this->fileStatus = $img->restore( $fileVersions );
 275                         $filesRestored = $this->fileStatus->successCount;
 276                 } else {
 277                         $filesRestored = 0;
 278                 }
 279
 280                 if( $restoreText ) {
 281                         $textRestored = $this->undeleteRevisions( $timestamps );
 282                 } else {
 283                         $textRestored = 0;
 284                 }
 285
 286                 // Touch the log!
 287                 global $wgContLang;
 288                 $log = new LogPage( 'delete' );
 289
 290                 if( $textRestored && $filesRestored ) {
 291                         $reason = wfMsgForContent( 'undeletedrevisions-files',
 292                                 $wgContLang->formatNum( $textRestored ),
 293                                 $wgContLang->formatNum( $filesRestored ) );
 294                 } elseif( $textRestored ) {
 295                         $reason = wfMsgForContent( 'undeletedrevisions',
 296                                 $wgContLang->formatNum( $textRestored ) );
 297                 } elseif( $filesRestored ) {
 298                         $reason = wfMsgForContent( 'undeletedfiles',
 299                                 $wgContLang->formatNum( $filesRestored ) );
 300                 } else {
 301                         wfDebug( "Undelete: nothing undeleted...\n" );
 302                         return false;
 303                 }
 304
 305                 if( trim( $comment ) != '' )
 306                         $reason .= ": {$comment}";
 307                 $log->addEntry( 'restore', $this->title, $reason );
 308
 309                 if ( $this->fileStatus && !$this->fileStatus->ok ) {
 310                         return false;
 311                 } else {
 312                         return true;
 313                 }
 314         }
 315
 316         /**
 317          * This is the meaty bit -- restores archived revisions of the given page
 318          * to the cur/old tables. If the page currently exists, all revisions will
 319          * be stuffed into old, otherwise the most recent will go into cur.
 320          *
 321          * @param array $timestamps Pass an empty array to restore all revisions, otherwise list the ones to undelete.
 322          * @param string $comment
 323          * @param array $fileVersions
 324          *
 325          * @return int number of revisions restored
 326          */
 327         private function undeleteRevisions( $timestamps ) {
 328                 $restoreAll = empty( $timestamps );
 329
 330                 $dbw = wfGetDB( DB_MASTER );
 331
 332                 # Does this page already exist? We'll have to update it...
 333                 $article = new Article( $this->title );
 334                 $options = 'FOR UPDATE';
 335                 $page = $dbw->selectRow( 'page',
 336                         array( 'page_id', 'page_latest' ),
 337                         array( 'page_namespace' => $this->title->getNamespace(),
 338                                'page_title'     => $this->title->getDBkey() ),
 339                         __METHOD__,
 340                         $options );
 341                 if( $page ) {
 342                         # Page already exists. Import the history, and if necessary
 343                         # we'll update the latest revision field in the record.
 344                         $newid             = 0;
 345                         $pageId            = $page->page_id;
 346                         $previousRevId     = $page->page_latest;
 347                 } else {
 348                         # Have to create a new article...
 349                         $newid  = $article->insertOn( $dbw );
 350                         $pageId = $newid;
 351                         $previousRevId = 0;
 352                 }
 353
 354                 if( $restoreAll ) {
 355                         $oldones = '1 = 1'; # All revisions...
 356                 } else {
 357                         $oldts = implode( ',',
 358                                 array_map( array( &$dbw, 'addQuotes' ),
 359                                         array_map( array( &$dbw, 'timestamp' ),
 360                                                 $timestamps ) ) );
 361
 362                         $oldones = "ar_timestamp IN ( {$oldts} )";
 363                 }
 364
 365                 /**
 366                  * Restore each revision...
 367                  */
 368                 $result = $dbw->select( 'archive',
 369                         /* fields */ array(
 370                                 'ar_rev_id',
 371                                 'ar_text',
 372                                 'ar_comment',
 373                                 'ar_user',
 374                                 'ar_user_text',
 375                                 'ar_timestamp',
 376                                 'ar_minor_edit',
 377                                 'ar_flags',
 378                                 'ar_text_id',
 379                                 'ar_len' ),
 380                         /* WHERE */ array(
 381                                 'ar_namespace' => $this->title->getNamespace(),
 382                                 'ar_title'     => $this->title->getDBkey(),
 383                                 $oldones ),
 384                         __METHOD__,
 385                         /* options */ array(
 386                                 'ORDER BY' => 'ar_timestamp' )
 387                         );
 388                 if( $dbw->numRows( $result ) < count( $timestamps ) ) {
 389                         wfDebug( __METHOD__.": couldn't find all requested rows\n" );
 390                         return false;
 391                 }
 392
 393                 $revision = null;
 394                 $restored = 0;
 395
 396                 while( $row = $dbw->fetchObject( $result ) ) {
 397                         if( $row->ar_text_id ) {
 398                                 // Revision was deleted in 1.5+; text is in
 399                                 // the regular text table, use the reference.
 400                                 // Specify null here so the so the text is
 401                                 // dereferenced for page length info if needed.
 402                                 $revText = null;
 403                         } else {
 404                                 // Revision was deleted in 1.4 or earlier.
 405                                 // Text is squashed into the archive row, and
 406                                 // a new text table entry will be created for it.
 407                                 $revText = Revision::getRevisionText( $row, 'ar_' );
 408                         }
 409                         $revision = new Revision( array(
 410                                 'page'       => $pageId,
 411                                 'id'         => $row->ar_rev_id,
 412                                 'text'       => $revText,
 413                                 'comment'    => $row->ar_comment,
 414                                 'user'       => $row->ar_user,
 415                                 'user_text'  => $row->ar_user_text,
 416                                 'timestamp'  => $row->ar_timestamp,
 417                                 'minor_edit' => $row->ar_minor_edit,
 418                                 'text_id'    => $row->ar_text_id,
 419                                 'len'            => $row->ar_len
 420                                 ) );
 421                         $revision->insertOn( $dbw );
 422                         $restored++;
 423                 }
 424
 425                 if( $revision ) {
 426                         // Attach the latest revision to the page...
 427                         $wasnew = $article->updateIfNewerOn( $dbw, $revision, $previousRevId );
 428
 429                         if( $newid || $wasnew ) {
 430                                 // Update site stats, link tables, etc
 431                                 $article->createUpdates( $revision );
 432                         }
 433
 434                         if( $newid ) {
 435                                 wfRunHooks( 'ArticleUndelete', array( &$this->title, true ) );
 436                                 Article::onArticleCreate( $this->title );
 437                         } else {
 438                                 wfRunHooks( 'ArticleUndelete', array( &$this->title, false ) );
 439                                 Article::onArticleEdit( $this->title );
 440                         }
 441                 } else {
 442                         # Something went terribly wrong!
 443                 }
 444
 445                 # Now that it's safely stored, take it out of the archive
 446                 $dbw->delete( 'archive',
 447                         /* WHERE */ array(
 448                                 'ar_namespace' => $this->title->getNamespace(),
 449                                 'ar_title' => $this->title->getDBkey(),
 450                                 $oldones ),
 451                         __METHOD__ );
 452
 453                 return $restored;
 454         }
 455
 456         function getFileStatus() { return $this->fileStatus; }
 457 }
 458
 459 /**
 460  * The HTML form for Special:Undelete, which allows users with the appropriate
 461  * permissions to view and restore deleted content.
 462  * @addtogroup SpecialPage
 463  */
 464 class UndeleteForm {
 465         var $mAction, $mTarget, $mTimestamp, $mRestore, $mTargetObj;
 466         var $mTargetTimestamp, $mAllowed, $mComment;
 467
 468         function UndeleteForm( $request, $par = "" ) {
 469                 global $wgUser;
 470                 $this->mAction = $request->getVal( 'action' );
 471                 $this->mTarget = $request->getVal( 'target' );
 472                 $this->mSearchPrefix = $request->getText( 'prefix' );
 473                 $time = $request->getVal( 'timestamp' );
 474                 $this->mTimestamp = $time ? wfTimestamp( TS_MW, $time ) : '';
 475                 $this->mFile = $request->getVal( 'file' );
 476
 477                 $posted = $request->wasPosted() &&
 478                         $wgUser->matchEditToken( $request->getVal( 'wpEditToken' ) );
 479                 $this->mRestore = $request->getCheck( 'restore' ) && $posted;
 480                 $this->mPreview = $request->getCheck( 'preview' ) && $posted;
 481                 $this->mComment = $request->getText( 'wpComment' );
 482
 483                 if( $par != "" ) {
 484                         $this->mTarget = $par;
 485                 }
 486                 if ( $wgUser->isAllowed( 'delete' ) && !$wgUser->isBlocked() ) {
 487                         $this->mAllowed = true;
 488                 } else {
 489                         $this->mAllowed = false;
 490                         $this->mTimestamp = '';
 491                         $this->mRestore = false;
 492                 }
 493                 if ( $this->mTarget !== "" ) {
 494                         $this->mTargetObj = Title::newFromURL( $this->mTarget );
 495                 } else {
 496                         $this->mTargetObj = NULL;
 497                 }
 498                 if( $this->mRestore ) {
 499                         $timestamps = array();
 500                         $this->mFileVersions = array();
 501                         foreach( $_REQUEST as $key => $val ) {
 502                                 $matches = array();
 503                                 if( preg_match( '/^ts(\d{14})$/', $key, $matches ) ) {
 504                                         array_push( $timestamps, $matches[1] );
 505                                 }
 506
 507                                 if( preg_match( '/^fileid(\d+)$/', $key, $matches ) ) {
 508                                         $this->mFileVersions[] = intval( $matches[1] );
 509                                 }
 510                         }
 511                         rsort( $timestamps );
 512                         $this->mTargetTimestamp = $timestamps;
 513                 }
 514         }
 515
 516         function execute() {
 517                 global $wgOut;
 518                 if ( $this->mAllowed ) {
 519                         $wgOut->setPagetitle( wfMsg( "undeletepage" ) );
 520                 } else {
 521                         $wgOut->setPagetitle( wfMsg( "viewdeletedpage" ) );
 522                 }
 523
 524                 if( is_null( $this->mTargetObj ) ) {
 525                         $this->showSearchForm();
 526
 527                         # List undeletable articles
 528                         if( $this->mSearchPrefix ) {
 529                                 $result = PageArchive::listPagesByPrefix(
 530                                         $this->mSearchPrefix );
 531                                 $this->showList( $result );
 532                         }
 533                         return;
 534                 }
 535                 if( $this->mTimestamp !== '' ) {
 536                         return $this->showRevision( $this->mTimestamp );
 537                 }
 538                 if( $this->mFile !== null ) {
 539                         return $this->showFile( $this->mFile );
 540                 }
 541                 if( $this->mRestore && $this->mAction == "submit" ) {
 542                         return $this->undelete();
 543                 }
 544                 return $this->showHistory();
 545         }
 546
 547         function showSearchForm() {
 548                 global $wgOut, $wgScript;
 549                 $wgOut->addWikiText( wfMsg( 'undelete-header' ) );
 550
 551                 $wgOut->addHtml(
 552                         Xml::openElement( 'form', array(
 553                                 'method' => 'get',
 554                                 'action' => $wgScript ) ) .
 555                         '<fieldset>' .
 556                         Xml::element( 'legend', array(),
 557                                 wfMsg( 'undelete-search-box' ) ) .
 558                         Xml::hidden( 'title',
 559                                 SpecialPage::getTitleFor( 'Undelete' )->getPrefixedDbKey() ) .
 560                         Xml::inputLabel( wfMsg( 'undelete-search-prefix' ),
 561                                 'prefix', 'prefix', 20,
 562                                 $this->mSearchPrefix ) .
 563                         Xml::submitButton( wfMsg( 'undelete-search-submit' ) ) .
 564                         '</fieldset>' .
 565                         '</form>' );
 566         }
 567
 568         /* private */ function showList( $result ) {
 569                 global $wgLang, $wgContLang, $wgUser, $wgOut;
 570
 571                 if( $result->numRows() == 0 ) {
 572                         $wgOut->addWikiText( wfMsg( 'undelete-no-results' ) );
 573                         return;
 574                 }
 575
 576                 $wgOut->addWikiText( wfMsg( "undeletepagetext" ) );
 577
 578                 $sk = $wgUser->getSkin();
 579                 $undelete = SpecialPage::getTitleFor( 'Undelete' );
 580                 $wgOut->addHTML( "<ul>\n" );
 581                 while( $row = $result->fetchObject() ) {
 582                         $title = Title::makeTitleSafe( $row->ar_namespace, $row->ar_title );
 583                         $link = $sk->makeKnownLinkObj( $undelete, htmlspecialchars( $title->getPrefixedText() ), 'target=' . $title->getPrefixedUrl() );
 584                         #$revs = wfMsgHtml( 'undeleterevisions', $wgLang->formatNum( $row->count ) );
 585                         $revs = wfMsgExt( 'undeleterevisions',
 586                                 array( 'parseinline' ),
 587                                 $wgLang->formatNum( $row->count ) );
 588                         $wgOut->addHtml( "<li>{$link} ({$revs})</li>\n" );
 589                 }
 590                 $result->free();
 591                 $wgOut->addHTML( "</ul>\n" );
 592
 593                 return true;
 594         }
 595
 596         /* private */ function showRevision( $timestamp ) {
 597                 global $wgLang, $wgUser, $wgOut;
 598                 $self = SpecialPage::getTitleFor( 'Undelete' );
 599                 $skin = $wgUser->getSkin();
 600
 601                 if(!preg_match("/[0-9]{14}/",$timestamp)) return 0;
 602
 603                 $archive = new PageArchive( $this->mTargetObj );
 604                 $rev = $archive->getRevision( $timestamp );
 605
 606                 if( !$rev ) {
 607                         $wgOut->addWikiTexT( wfMsg( 'undeleterevision-missing' ) );
 608                         return;
 609                 }
 610
 611                 $wgOut->setPageTitle( wfMsg( 'undeletepage' ) );
 612
 613                 $link = $skin->makeKnownLinkObj(
 614                         $self,
 615                         htmlspecialchars( $this->mTargetObj->getPrefixedText() ),
 616                         'target=' . $this->mTargetObj->getPrefixedUrl()
 617                 );
 618                 $time = htmlspecialchars( $wgLang->timeAndDate( $timestamp ) );
 619                 $user = $skin->userLink( $rev->getUser(), $rev->getUserText() )
 620                         . $skin->userToolLinks( $rev->getUser(), $rev->getUserText() );
 621
 622                 $wgOut->addHtml( '<p>' . wfMsgHtml( 'undelete-revision', $link, $time, $user ) . '</p>' );
 623
 624                 wfRunHooks( 'UndeleteShowRevision', array( $this->mTargetObj, $rev ) );
 625
 626                 if( $this->mPreview ) {
 627                         $wgOut->addHtml( "<hr />\n" );
 628                         $wgOut->addWikiTextTitleTidy( $rev->getText(), $this->mTargetObj, false );
 629                 }
 630
 631                 $wgOut->addHtml(
 632                         wfElement( 'textarea', array(
 633                                         'readonly' => 'readonly',
 634                                         'cols' => intval( $wgUser->getOption( 'cols' ) ),
 635                                         'rows' => intval( $wgUser->getOption( 'rows' ) ) ),
 636                                 $rev->getText() . "\n" ) .
 637                         wfOpenElement( 'div' ) .
 638                         wfOpenElement( 'form', array(
 639                                 'method' => 'post',
 640                                 'action' => $self->getLocalURL( "action=submit" ) ) ) .
 641                         wfElement( 'input', array(
 642                                 'type' => 'hidden',
 643                                 'name' => 'target',
 644                                 'value' => $this->mTargetObj->getPrefixedDbKey() ) ) .
 645                         wfElement( 'input', array(
 646                                 'type' => 'hidden',
 647                                 'name' => 'timestamp',
 648                                 'value' => $timestamp ) ) .
 649                         wfElement( 'input', array(
 650                                 'type' => 'hidden',
 651                                 'name' => 'wpEditToken',
 652                                 'value' => $wgUser->editToken() ) ) .
 653                         wfElement( 'input', array(
 654                                 'type' => 'hidden',
 655                                 'name' => 'preview',
 656                                 'value' => '1' ) ) .
 657                         wfElement( 'input', array(
 658                                 'type' => 'submit',
 659                                 'value' => wfMsg( 'showpreview' ) ) ) .
 660                         wfCloseElement( 'form' ) .
 661                         wfCloseElement( 'div' ) );
 662         }
 663
 664         /**
 665          * Show a deleted file version requested by the visitor.
 666          */
 667         function showFile( $key ) {
 668                 global $wgOut, $wgRequest;
 669                 $wgOut->disable();
 670
 671                 # We mustn't allow the output to be Squid cached, otherwise
 672                 # if an admin previews a deleted image, and it's cached, then
 673                 # a user without appropriate permissions can toddle off and
 674                 # nab the image, and Squid will serve it
 675                 $wgRequest->response()->header( 'Expires: ' . gmdate( 'D, d M Y H:i:s', 0 ) . ' GMT' );
 676                 $wgRequest->response()->header( 'Cache-Control: no-cache, no-store, max-age=0, must-revalidate' );
 677                 $wgRequest->response()->header( 'Pragma: no-cache' );
 678
 679                 $store = FileStore::get( 'deleted' );
 680                 $store->stream( $key );
 681         }
 682
 683         /* private */ function showHistory() {
 684                 global $wgLang, $wgContLang, $wgUser, $wgOut;
 685
 686                 $sk = $wgUser->getSkin();
 687                 if ( $this->mAllowed ) {
 688                         $wgOut->setPagetitle( wfMsg( "undeletepage" ) );
 689                 } else {
 690                         $wgOut->setPagetitle( wfMsg( 'viewdeletedpage' ) );
 691                 }
 692
 693                 $archive = new PageArchive( $this->mTargetObj );
 694                 /*
 695                 $text = $archive->getLastRevisionText();
 696                 if( is_null( $text ) ) {
 697                         $wgOut->addWikiText( wfMsg( "nohistory" ) );
 698                         return;
 699                 }
 700                 */
 701                 if ( $this->mAllowed ) {
 702                         $wgOut->addWikiText( wfMsg( "undeletehistory" ) );
 703                 } else {
 704                         $wgOut->addWikiText( wfMsg( "undeletehistorynoadmin" ) );
 705                 }
 706
 707                 # List all stored revisions
 708                 $revisions = $archive->listRevisions();
 709                 $files = $archive->listFiles();
 710
 711                 $haveRevisions = $revisions && $revisions->numRows() > 0;
 712                 $haveFiles = $files && $files->numRows() > 0;
 713
 714                 # Batch existence check on user and talk pages
 715                 if( $haveRevisions ) {
 716                         $batch = new LinkBatch();
 717                         while( $row = $revisions->fetchObject() ) {
 718                                 $batch->addObj( Title::makeTitleSafe( NS_USER, $row->ar_user_text ) );
 719                                 $batch->addObj( Title::makeTitleSafe( NS_USER_TALK, $row->ar_user_text ) );
 720                         }
 721                         $batch->execute();
 722                         $revisions->seek( 0 );
 723                 }
 724                 if( $haveFiles ) {
 725                         $batch = new LinkBatch();
 726                         while( $row = $files->fetchObject() ) {
 727                                 $batch->addObj( Title::makeTitleSafe( NS_USER, $row->fa_user_text ) );
 728                                 $batch->addObj( Title::makeTitleSafe( NS_USER_TALK, $row->fa_user_text ) );
 729                         }
 730                         $batch->execute();
 731                         $files->seek( 0 );
 732                 }
 733
 734                 if ( $this->mAllowed ) {
 735                         $titleObj = SpecialPage::getTitleFor( "Undelete" );
 736                         $action = $titleObj->getLocalURL( "action=submit" );
 737                         # Start the form here
 738                         $top = Xml::openElement( 'form', array( 'method' => 'post', 'action' => $action, 'id' => 'undelete' ) );
 739                         $wgOut->addHtml( $top );
 740                 }
 741
 742                 # Show relevant lines from the deletion log:
 743                 $wgOut->addHTML( "<h2>" . htmlspecialchars( LogPage::logName( 'delete' ) ) . "</h2>\n" );
 744                 $logViewer = new LogViewer(
 745                         new LogReader(
 746                                 new FauxRequest(
 747                                         array(
 748                                                 'page' => $this->mTargetObj->getPrefixedText(),
 749                                                 'type' => 'delete'
 750                                         )
 751                                 )
 752                         ), LogViewer::NO_ACTION_LINK
 753                 );
 754                 $logViewer->showList( $wgOut );
 755
 756                 if( $this->mAllowed && ( $haveRevisions || $haveFiles ) ) {
 757                         # Format the user-visible controls (comment field, submission button)
 758                         # in a nice little table
 759                         $align = $wgContLang->isRtl() ? 'left' : 'right';
 760                         $table =
 761                                 Xml::openElement( 'fieldset' ) .
 762                                 Xml::openElement( 'table' ) .
 763                                         "<tr>
 764                                                 <td colspan='2'>" .
 765                                                         wfMsgWikiHtml( 'undeleteextrahelp' ) .
 766                                                 "</td>
 767                                         </tr>
 768                                         <tr>
 769                                                 <td align='$align'>" .
 770                                                         Xml::label( wfMsg( 'undeletecomment' ), 'wpComment' ) .
 771                                                 "</td>
 772                                                 <td>" .
 773                                                         Xml::input( 'wpComment', 50, $this->mComment ) .
 774                                                 "</td>
 775                                         </tr>
 776                                         <tr>
 777                                                 <td>&nbsp;</td>
 778                                                 <td>" .
 779                                                         Xml::submitButton( wfMsg( 'undeletebtn' ), array( 'name' => 'restore', 'id' => 'mw-undelete-submit' ) ) .
 780                                                         Xml::element( 'input', array( 'type' => 'reset', 'value' => wfMsg( 'undeletereset' ), 'id' => 'mw-undelete-reset' ) ) .
 781                                                 "</td>
 782                                         </tr>" .
 783                                 Xml::closeElement( 'table' ) .
 784                                 Xml::closeElement( 'fieldset' );
 785
 786                         $wgOut->addHtml( $table );
 787                 }
 788
 789                 $wgOut->addHTML( "<h2>" . htmlspecialchars( wfMsg( "history" ) ) . "</h2>\n" );
 790
 791                 if( $haveRevisions ) {
 792                         # The page's stored (deleted) history:
 793                         $wgOut->addHTML("<ul>");
 794                         $target = urlencode( $this->mTarget );
 795                         while( $row = $revisions->fetchObject() ) {
 796                                 $ts = wfTimestamp( TS_MW, $row->ar_timestamp );
 797                                 if ( $this->mAllowed ) {
 798                                         $checkBox = Xml::check( "ts$ts" );
 799                                         $pageLink = $sk->makeKnownLinkObj( $titleObj,
 800                                                 $wgLang->timeanddate( $ts, true ),
 801                                                 "target=$target&timestamp=$ts" );
 802                                 } else {
 803                                         $checkBox = '';
 804                                         $pageLink = $wgLang->timeanddate( $ts, true );
 805                                 }
 806                                 $userLink = $sk->userLink( $row->ar_user, $row->ar_user_text ) . $sk->userToolLinks( $row->ar_user, $row->ar_user_text );
 807                                 $stxt = '';
 808                                 if (!is_null($size = $row->ar_len)) {
 809                                         if ($size == 0) {
 810                                                 $stxt = wfMsgHtml('historyempty');
 811                                         } else {
 812                                                 $stxt = wfMsgHtml('historysize', $wgLang->formatNum( $size ) );
 813                                         }
 814                                 }
 815                                 $comment = $sk->commentBlock( $row->ar_comment );
 816                                 $wgOut->addHTML( "<li>$checkBox $pageLink . . $userLink $stxt $comment</li>\n" );
 817
 818                         }
 819                         $revisions->free();
 820                         $wgOut->addHTML("</ul>");
 821                 } else {
 822                         $wgOut->addWikiText( wfMsg( "nohistory" ) );
 823                 }
 824
 825                 if( $haveFiles ) {
 826                         $wgOut->addHtml( "<h2>" . wfMsgHtml( 'filehist' ) . "</h2>\n" );
 827                         $wgOut->addHtml( "<ul>" );
 828                         while( $row = $files->fetchObject() ) {
 829                                 $ts = wfTimestamp( TS_MW, $row->fa_timestamp );
 830                                 if ( $this->mAllowed && $row->fa_storage_key ) {
 831                                         $checkBox = Xml::check( "fileid" . $row->fa_id );
 832                                         $key = urlencode( $row->fa_storage_key );
 833                                         $target = urlencode( $this->mTarget );
 834                                         $pageLink = $sk->makeKnownLinkObj( $titleObj,
 835                                                 $wgLang->timeanddate( $ts, true ),
 836                                                 "target=$target&file=$key" );
 837                                 } else {
 838                                         $checkBox = '';
 839                                         $pageLink = $wgLang->timeanddate( $ts, true );
 840                                 }
 841                                 $userLink = $sk->userLink( $row->fa_user, $row->fa_user_text ) . $sk->userToolLinks( $row->fa_user, $row->fa_user_text );
 842                                 $data =
 843                                         wfMsgHtml( 'widthheight',
 844                                                 $wgLang->formatNum( $row->fa_width ),
 845                                                 $wgLang->formatNum( $row->fa_height ) ) .
 846                                         ' (' .
 847                                         wfMsgHtml( 'nbytes', $wgLang->formatNum( $row->fa_size ) ) .
 848                                         ')';
 849                                 $comment = $sk->commentBlock( $row->fa_description );
 850                                 $wgOut->addHTML( "<li>$checkBox $pageLink . . $userLink $data $comment</li>\n" );
 851                         }
 852                         $files->free();
 853                         $wgOut->addHTML( "</ul>" );
 854                 }
 855
 856                 if ( $this->mAllowed ) {
 857                         # Slip in the hidden controls here
 858                         $misc  = Xml::hidden( 'target', $this->mTarget );
 859                         $misc .= Xml::hidden( 'wpEditToken', $wgUser->editToken() );
 860                         $misc .= Xml::closeElement( 'form' );
 861                         $wgOut->addHtml( $misc );
 862                 }
 863
 864                 return true;
 865         }
 866
 867         function undelete() {
 868                 global $wgOut, $wgUser;
 869                 if( !is_null( $this->mTargetObj ) ) {
 870                         $archive = new PageArchive( $this->mTargetObj );
 871
 872                         $ok = $archive->undelete(
 873                                 $this->mTargetTimestamp,
 874                                 $this->mComment,
 875                                 $this->mFileVersions );
 876
 877                         if( $ok ) {
 878                                 $skin = $wgUser->getSkin();
 879                                 $link = $skin->makeKnownLinkObj( $this->mTargetObj );
 880                                 $wgOut->addHtml( wfMsgWikiHtml( 'undeletedpage', $link ) );
 881                         } else {
 882                                 $wgOut->showFatalError( wfMsg( "cannotundelete" ) );
 883                         }
 884
 885                         // Show file deletion warnings and errors
 886                         $status = $archive->getFileStatus();
 887                         if ( $status && !$status->isGood() ) {
 888                                 $wgOut->addWikiText( $status->getWikiText( 'undelete-error-short', 'undelete-error-long' ) );
 889                         }
 890                 } else {
 891                         $wgOut->showFatalError( wfMsg( "cannotundelete" ) );
 892                 }
 893                 return false;
 894         }
 895 }
 896
 897