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