includes/specials/SpecialUndelete.php

   1 <?php
   2
   3 /**
   4  * Special page allowing users with the appropriate permissions to view
   5  * and restore deleted content
   6  *
   7  * @file
   8  * @ingroup SpecialPage
   9  */
  10
  11 /**
  12  * Constructor
  13  */
  14 function wfSpecialUndelete( $par ) {
  15         global $wgRequest;
  16
  17         $form = new UndeleteForm( $wgRequest, $par );
  18         $form->execute();
  19 }
  20
  21 /**
  22  * Used to show archived pages and eventually restore them.
  23  * @ingroup SpecialPage
  24  */
  25 class PageArchive {
  26         protected $title;
  27         var $fileStatus;
  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          * @param $prefix String: title prefix
  54          * @return ResultWrapper
  55          */
  56         public static function listPagesByPrefix( $prefix ) {
  57                 $dbr = wfGetDB( DB_SLAVE );
  58
  59                 $title = Title::newFromText( $prefix );
  60                 if( $title ) {
  61                         $ns = $title->getNamespace();
  62                         $prefix = $title->getDBkey();
  63                 } else {
  64                         // Prolly won't work too good
  65                         // @todo handle bare namespace names cleanly?
  66                         $ns = 0;
  67                 }
  68                 $conds = array(
  69                         'ar_namespace' => $ns,
  70                         'ar_title' . $dbr->buildLike( $prefix, $dbr->anyString() ),
  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', 'ar_len', 'ar_deleted' ),
 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          * @todo Does this belong in Image for fuller encapsulation?
 120          */
 121         function listFiles() {
 122                 if( $this->title->getNamespace() == NS_FILE ) {
 123                         $dbr = wfGetDB( DB_SLAVE );
 124                         $res = $dbr->select( 'filearchive',
 125                                 array(
 126                                         'fa_id',
 127                                         'fa_name',
 128                                         'fa_archive_name',
 129                                         'fa_storage_key',
 130                                         'fa_storage_group',
 131                                         'fa_size',
 132                                         'fa_width',
 133                                         'fa_height',
 134                                         'fa_bits',
 135                                         'fa_metadata',
 136                                         'fa_media_type',
 137                                         'fa_major_mime',
 138                                         'fa_minor_mime',
 139                                         'fa_description',
 140                                         'fa_user',
 141                                         'fa_user_text',
 142                                         'fa_timestamp',
 143                                         'fa_deleted' ),
 144                                 array( 'fa_name' => $this->title->getDBkey() ),
 145                                 __METHOD__,
 146                                 array( 'ORDER BY' => 'fa_timestamp DESC' ) );
 147                         $ret = $dbr->resultObject( $res );
 148                         return $ret;
 149                 }
 150                 return null;
 151         }
 152
 153         /**
 154          * Fetch (and decompress if necessary) the stored text for the deleted
 155          * revision of the page with the given timestamp.
 156          *
 157          * @param $timestamp String
 158          * @return String
 159          * @deprecated Use getRevision() for more flexible information
 160          */
 161         function getRevisionText( $timestamp ) {
 162                 $rev = $this->getRevision( $timestamp );
 163                 return $rev ? $rev->getText() : null;
 164         }
 165
 166         /**
 167          * Return a Revision object containing data for the deleted revision.
 168          * Note that the result *may* or *may not* have a null page ID.
 169          *
 170          * @param $timestamp String
 171          * @return Revision
 172          */
 173         function getRevision( $timestamp ) {
 174                 $dbr = wfGetDB( DB_SLAVE );
 175                 $row = $dbr->selectRow( 'archive',
 176                         array(
 177                                 'ar_rev_id',
 178                                 'ar_text',
 179                                 'ar_comment',
 180                                 'ar_user',
 181                                 'ar_user_text',
 182                                 'ar_timestamp',
 183                                 'ar_minor_edit',
 184                                 'ar_flags',
 185                                 'ar_text_id',
 186                                 'ar_deleted',
 187                                 'ar_len' ),
 188                         array( 'ar_namespace' => $this->title->getNamespace(),
 189                                'ar_title' => $this->title->getDBkey(),
 190                                'ar_timestamp' => $dbr->timestamp( $timestamp ) ),
 191                         __METHOD__ );
 192                 if( $row ) {
 193                         return Revision::newFromArchiveRow( $row, array( 'page' => $this->title->getArticleId() ) );
 194                 } else {
 195                         return null;
 196                 }
 197         }
 198
 199         /**
 200          * Return the most-previous revision, either live or deleted, against
 201          * the deleted revision given by timestamp.
 202          *
 203          * May produce unexpected results in case of history merges or other
 204          * unusual time issues.
 205          *
 206          * @param $timestamp String
 207          * @return Revision or null
 208          */
 209         function getPreviousRevision( $timestamp ) {
 210                 $dbr = wfGetDB( DB_SLAVE );
 211
 212                 // Check the previous deleted revision...
 213                 $row = $dbr->selectRow( 'archive',
 214                         'ar_timestamp',
 215                         array( 'ar_namespace' => $this->title->getNamespace(),
 216                                'ar_title' => $this->title->getDBkey(),
 217                                'ar_timestamp < ' .
 218                                                 $dbr->addQuotes( $dbr->timestamp( $timestamp ) ) ),
 219                         __METHOD__,
 220                         array(
 221                                 'ORDER BY' => 'ar_timestamp DESC',
 222                                 'LIMIT' => 1 ) );
 223                 $prevDeleted = $row ? wfTimestamp( TS_MW, $row->ar_timestamp ) : false;
 224
 225                 $row = $dbr->selectRow( array( 'page', 'revision' ),
 226                         array( 'rev_id', 'rev_timestamp' ),
 227                         array(
 228                                 'page_namespace' => $this->title->getNamespace(),
 229                                 'page_title' => $this->title->getDBkey(),
 230                                 'page_id = rev_page',
 231                                 'rev_timestamp < ' .
 232                                                 $dbr->addQuotes( $dbr->timestamp( $timestamp ) ) ),
 233                         __METHOD__,
 234                         array(
 235                                 'ORDER BY' => 'rev_timestamp DESC',
 236                                 'LIMIT' => 1 ) );
 237                 $prevLive = $row ? wfTimestamp( TS_MW, $row->rev_timestamp ) : false;
 238                 $prevLiveId = $row ? intval( $row->rev_id ) : null;
 239
 240                 if( $prevLive && $prevLive > $prevDeleted ) {
 241                         // Most prior revision was live
 242                         return Revision::newFromId( $prevLiveId );
 243                 } elseif( $prevDeleted ) {
 244                         // Most prior revision was deleted
 245                         return $this->getRevision( $prevDeleted );
 246                 } else {
 247                         // No prior revision on this page.
 248                         return null;
 249                 }
 250         }
 251
 252         /**
 253          * Get the text from an archive row containing ar_text, ar_flags and ar_text_id
 254          *
 255          * @param $row Object: database row
 256          * @return Revision
 257          */
 258         function getTextFromRow( $row ) {
 259                 if( is_null( $row->ar_text_id ) ) {
 260                         // An old row from MediaWiki 1.4 or previous.
 261                         // Text is embedded in this row in classic compression format.
 262                         return Revision::getRevisionText( $row, "ar_" );
 263                 } else {
 264                         // New-style: keyed to the text storage backend.
 265                         $dbr = wfGetDB( DB_SLAVE );
 266                         $text = $dbr->selectRow( 'text',
 267                                 array( 'old_text', 'old_flags' ),
 268                                 array( 'old_id' => $row->ar_text_id ),
 269                                 __METHOD__ );
 270                         return Revision::getRevisionText( $text );
 271                 }
 272         }
 273
 274
 275         /**
 276          * Fetch (and decompress if necessary) the stored text of the most
 277          * recently edited deleted revision of the page.
 278          *
 279          * If there are no archived revisions for the page, returns NULL.
 280          *
 281          * @return String
 282          */
 283         function getLastRevisionText() {
 284                 $dbr = wfGetDB( DB_SLAVE );
 285                 $row = $dbr->selectRow( 'archive',
 286                         array( 'ar_text', 'ar_flags', 'ar_text_id' ),
 287                         array( 'ar_namespace' => $this->title->getNamespace(),
 288                                'ar_title' => $this->title->getDBkey() ),
 289                         'PageArchive::getLastRevisionText',
 290                         array( 'ORDER BY' => 'ar_timestamp DESC' ) );
 291                 if( $row ) {
 292                         return $this->getTextFromRow( $row );
 293                 } else {
 294                         return null;
 295                 }
 296         }
 297
 298         /**
 299          * Quick check if any archived revisions are present for the page.
 300          *
 301          * @return Boolean
 302          */
 303         function isDeleted() {
 304                 $dbr = wfGetDB( DB_SLAVE );
 305                 $n = $dbr->selectField( 'archive', 'COUNT(ar_title)',
 306                         array( 'ar_namespace' => $this->title->getNamespace(),
 307                                'ar_title' => $this->title->getDBkey() ) );
 308                 return ($n > 0);
 309         }
 310
 311         /**
 312          * Restore the given (or all) text and file revisions for the page.
 313          * Once restored, the items will be removed from the archive tables.
 314          * The deletion log will be updated with an undeletion notice.
 315          *
 316          * @param $timestamps Array: pass an empty array to restore all revisions, otherwise list the ones to undelete.
 317          * @param $comment String
 318          * @param $fileVersions Array
 319          * @param $unsuppress Boolean
 320          *
 321          * @return array(number of file revisions restored, number of image revisions restored, log message)
 322          * on success, false on failure
 323          */
 324         function undelete( $timestamps, $comment = '', $fileVersions = array(), $unsuppress = false ) {
 325                 // If both the set of text revisions and file revisions are empty,
 326                 // restore everything. Otherwise, just restore the requested items.
 327                 $restoreAll = empty( $timestamps ) && empty( $fileVersions );
 328
 329                 $restoreText = $restoreAll || !empty( $timestamps );
 330                 $restoreFiles = $restoreAll || !empty( $fileVersions );
 331
 332                 if( $restoreFiles && $this->title->getNamespace() == NS_FILE ) {
 333                         $img = wfLocalFile( $this->title );
 334                         $this->fileStatus = $img->restore( $fileVersions, $unsuppress );
 335                         $filesRestored = $this->fileStatus->successCount;
 336                 } else {
 337                         $filesRestored = 0;
 338                 }
 339
 340                 if( $restoreText ) {
 341                         $textRestored = $this->undeleteRevisions( $timestamps, $unsuppress, $comment );
 342                         if($textRestored === false) // It must be one of UNDELETE_*
 343                                 return false;
 344                 } else {
 345                         $textRestored = 0;
 346                 }
 347
 348                 // Touch the log!
 349                 global $wgContLang;
 350                 $log = new LogPage( 'delete' );
 351
 352                 if( $textRestored && $filesRestored ) {
 353                         $reason = wfMsgExt( 'undeletedrevisions-files', array( 'content', 'parsemag' ),
 354                                 $wgContLang->formatNum( $textRestored ),
 355                                 $wgContLang->formatNum( $filesRestored ) );
 356                 } elseif( $textRestored ) {
 357                         $reason = wfMsgExt( 'undeletedrevisions', array( 'content', 'parsemag' ),
 358                                 $wgContLang->formatNum( $textRestored ) );
 359                 } elseif( $filesRestored ) {
 360                         $reason = wfMsgExt( 'undeletedfiles', array( 'content', 'parsemag' ),
 361                                 $wgContLang->formatNum( $filesRestored ) );
 362                 } else {
 363                         wfDebug( "Undelete: nothing undeleted...\n" );
 364                         return false;
 365                 }
 366
 367                 if( trim( $comment ) != '' )
 368                         $reason .= wfMsgForContent( 'colon-separator' ) . $comment;
 369                 $log->addEntry( 'restore', $this->title, $reason );
 370
 371                 return array($textRestored, $filesRestored, $reason);
 372         }
 373
 374         /**
 375          * This is the meaty bit -- restores archived revisions of the given page
 376          * to the cur/old tables. If the page currently exists, all revisions will
 377          * be stuffed into old, otherwise the most recent will go into cur.
 378          *
 379          * @param $timestamps Array: pass an empty array to restore all revisions, otherwise list the ones to undelete.
 380          * @param $comment String
 381          * @param $unsuppress Boolean: remove all ar_deleted/fa_deleted restrictions of seletected revs
 382          *
 383          * @return Mixed: number of revisions restored or false on failure
 384          */
 385         private function undeleteRevisions( $timestamps, $unsuppress = false, $comment = '' ) {
 386                 if ( wfReadOnly() )
 387                         return false;
 388                 $restoreAll = empty( $timestamps );
 389
 390                 $dbw = wfGetDB( DB_MASTER );
 391
 392                 # Does this page already exist? We'll have to update it...
 393                 $article = new Article( $this->title );
 394                 $options = 'FOR UPDATE'; // lock page
 395                 $page = $dbw->selectRow( 'page',
 396                         array( 'page_id', 'page_latest' ),
 397                         array( 'page_namespace' => $this->title->getNamespace(),
 398                                'page_title'     => $this->title->getDBkey() ),
 399                         __METHOD__,
 400                         $options
 401                 );
 402                 if( $page ) {
 403                         $makepage = false;
 404                         # Page already exists. Import the history, and if necessary
 405                         # we'll update the latest revision field in the record.
 406                         $newid             = 0;
 407                         $pageId            = $page->page_id;
 408                         $previousRevId    = $page->page_latest;
 409                         # Get the time span of this page
 410                         $previousTimestamp = $dbw->selectField( 'revision', 'rev_timestamp',
 411                                 array( 'rev_id' => $previousRevId ),
 412                                 __METHOD__ );
 413                         if( $previousTimestamp === false ) {
 414                                 wfDebug( __METHOD__.": existing page refers to a page_latest that does not exist\n" );
 415                                 return 0;
 416                         }
 417                 } else {
 418                         # Have to create a new article...
 419                         $makepage = true;
 420                         $previousRevId = 0;
 421                         $previousTimestamp = 0;
 422                 }
 423
 424                 if( $restoreAll ) {
 425                         $oldones = '1 = 1'; # All revisions...
 426                 } else {
 427                         $oldts = implode( ',',
 428                                 array_map( array( &$dbw, 'addQuotes' ),
 429                                         array_map( array( &$dbw, 'timestamp' ),
 430                                                 $timestamps ) ) );
 431
 432                         $oldones = "ar_timestamp IN ( {$oldts} )";
 433                 }
 434
 435                 /**
 436                  * Select each archived revision...
 437                  */
 438                 $result = $dbw->select( 'archive',
 439                         /* fields */ array(
 440                                 'ar_rev_id',
 441                                 'ar_text',
 442                                 'ar_comment',
 443                                 'ar_user',
 444                                 'ar_user_text',
 445                                 'ar_timestamp',
 446                                 'ar_minor_edit',
 447                                 'ar_flags',
 448                                 'ar_text_id',
 449                                 'ar_deleted',
 450                                 'ar_page_id',
 451                                 'ar_len' ),
 452                         /* WHERE */ array(
 453                                 'ar_namespace' => $this->title->getNamespace(),
 454                                 'ar_title'     => $this->title->getDBkey(),
 455                                 $oldones ),
 456                         __METHOD__,
 457                         /* options */ array( 'ORDER BY' => 'ar_timestamp' )
 458                 );
 459                 $ret = $dbw->resultObject( $result );
 460                 $rev_count = $dbw->numRows( $result );
 461                 if( !$rev_count ) {
 462                         wfDebug( __METHOD__.": no revisions to restore\n" );
 463                         return false; // ???
 464                 }
 465
 466                 $ret->seek( $rev_count - 1 ); // move to last
 467                 $row = $ret->fetchObject(); // get newest archived rev
 468                 $ret->seek( 0 ); // move back
 469
 470                 if( $makepage ) {
 471                         // Check the state of the newest to-be version...
 472                         if( !$unsuppress && ($row->ar_deleted & Revision::DELETED_TEXT) ) {
 473                                 return false; // we can't leave the current revision like this!
 474                         }
 475                         // Safe to insert now...
 476                         $newid  = $article->insertOn( $dbw );
 477                         $pageId = $newid;
 478                 } else {
 479                         // Check if a deleted revision will become the current revision...
 480                         if( $row->ar_timestamp > $previousTimestamp ) {
 481                                 // Check the state of the newest to-be version...
 482                                 if( !$unsuppress && ($row->ar_deleted & Revision::DELETED_TEXT) ) {
 483                                         return false; // we can't leave the current revision like this!
 484                                 }
 485                         }
 486                 }
 487
 488                 $revision = null;
 489                 $restored = 0;
 490
 491                 while( $row = $ret->fetchObject() ) {
 492                         // Check for key dupes due to shitty archive integrity.
 493                         if( $row->ar_rev_id ) {
 494                                 $exists = $dbw->selectField( 'revision', '1', array('rev_id' => $row->ar_rev_id), __METHOD__ );
 495                                 if( $exists ) continue; // don't throw DB errors
 496                         }
 497                         // Insert one revision at a time...maintaining deletion status
 498                         // unless we are specifically removing all restrictions...
 499                         $revision = Revision::newFromArchiveRow( $row,
 500                                 array(
 501                                         'page' => $pageId,
 502                                         'deleted' => $unsuppress ? 0 : $row->ar_deleted
 503                                 ) );
 504
 505                         $revision->insertOn( $dbw );
 506                         $restored++;
 507
 508                         wfRunHooks( 'ArticleRevisionUndeleted', array( &$this->title, $revision, $row->ar_page_id ) );
 509                 }
 510                 # Now that it's safely stored, take it out of the archive
 511                 $dbw->delete( 'archive',
 512                         /* WHERE */ array(
 513                                 'ar_namespace' => $this->title->getNamespace(),
 514                                 'ar_title' => $this->title->getDBkey(),
 515                                 $oldones ),
 516                         __METHOD__ );
 517
 518                 // Was anything restored at all?
 519                 if( $restored == 0 )
 520                         return 0;
 521
 522                 if( $revision ) {
 523                         // Attach the latest revision to the page...
 524                         $wasnew = $article->updateIfNewerOn( $dbw, $revision, $previousRevId );
 525                         if( $newid || $wasnew ) {
 526                                 // Update site stats, link tables, etc
 527                                 $article->createUpdates( $revision );
 528                         }
 529
 530                         if( $newid ) {
 531                                 wfRunHooks( 'ArticleUndelete', array( &$this->title, true, $comment ) );
 532                                 Article::onArticleCreate( $this->title );
 533                         } else {
 534                                 wfRunHooks( 'ArticleUndelete', array( &$this->title, false, $comment ) );
 535                                 Article::onArticleEdit( $this->title );
 536                         }
 537
 538                         if( $this->title->getNamespace() == NS_FILE ) {
 539                                 $update = new HTMLCacheUpdate( $this->title, 'imagelinks' );
 540                                 $update->doUpdate();
 541                         }
 542                 } else {
 543                         // Revision couldn't be created. This is very weird
 544                         return self::UNDELETE_UNKNOWNERR;
 545                 }
 546
 547                 return $restored;
 548         }
 549
 550         function getFileStatus() { return $this->fileStatus; }
 551 }
 552
 553 /**
 554  * The HTML form for Special:Undelete, which allows users with the appropriate
 555  * permissions to view and restore deleted content.
 556  * @ingroup SpecialPage
 557  */
 558 class UndeleteForm {
 559         var $mAction, $mTarget, $mTimestamp, $mRestore, $mInvert, $mTargetObj;
 560         var $mTargetTimestamp, $mAllowed, $mCanView, $mComment, $mToken;
 561
 562         function UndeleteForm( $request, $par = "" ) {
 563                 global $wgUser;
 564                 $this->mAction = $request->getVal( 'action' );
 565                 $this->mTarget = $request->getVal( 'target' );
 566                 $this->mSearchPrefix = $request->getText( 'prefix' );
 567                 $time = $request->getVal( 'timestamp' );
 568                 $this->mTimestamp = $time ? wfTimestamp( TS_MW, $time ) : '';
 569                 $this->mFile = $request->getVal( 'file' );
 570
 571                 $posted = $request->wasPosted() &&
 572                         $wgUser->matchEditToken( $request->getVal( 'wpEditToken' ) );
 573                 $this->mRestore = $request->getCheck( 'restore' ) && $posted;
 574                 $this->mInvert = $request->getCheck( 'invert' ) && $posted;
 575                 $this->mPreview = $request->getCheck( 'preview' ) && $posted;
 576                 $this->mDiff = $request->getCheck( 'diff' );
 577                 $this->mComment = $request->getText( 'wpComment' );
 578                 $this->mUnsuppress = $request->getVal( 'wpUnsuppress' ) && $wgUser->isAllowed( 'suppressrevision' );
 579                 $this->mToken = $request->getVal( 'token' );
 580
 581                 if( $par != "" ) {
 582                         $this->mTarget = $par;
 583                 }
 584                 if ( $wgUser->isAllowed( 'undelete' ) && !$wgUser->isBlocked() ) {
 585                         $this->mAllowed = true; // user can restore
 586                         $this->mCanView = true; // user can view content
 587                 } elseif ( $wgUser->isAllowed( 'deletedtext' ) ) {
 588                         $this->mAllowed = false; // user cannot restore
 589                         $this->mCanView = true; // user can view content
 590                 }  else { // user can only view the list of revisions
 591                         $this->mAllowed = false;
 592                         $this->mCanView = false;
 593                         $this->mTimestamp = '';
 594                         $this->mRestore = false;
 595                 }
 596                 if ( $this->mTarget !== "" ) {
 597                         $this->mTargetObj = Title::newFromURL( $this->mTarget );
 598                 } else {
 599                         $this->mTargetObj = null;
 600                 }
 601                 if( $this->mRestore || $this->mInvert ) {
 602                         $timestamps = array();
 603                         $this->mFileVersions = array();
 604                         foreach( $_REQUEST as $key => $val ) {
 605                                 $matches = array();
 606                                 if( preg_match( '/^ts(\d{14})$/', $key, $matches ) ) {
 607                                         array_push( $timestamps, $matches[1] );
 608                                 }
 609
 610                                 if( preg_match( '/^fileid(\d+)$/', $key, $matches ) ) {
 611                                         $this->mFileVersions[] = intval( $matches[1] );
 612                                 }
 613                         }
 614                         rsort( $timestamps );
 615                         $this->mTargetTimestamp = $timestamps;
 616                 }
 617         }
 618
 619         function execute() {
 620                 global $wgOut, $wgUser;
 621                 if ( $this->mAllowed ) {
 622                         $wgOut->setPagetitle( wfMsg( "undeletepage" ) );
 623                 } else {
 624                         $wgOut->setPagetitle( wfMsg( "viewdeletedpage" ) );
 625                 }
 626
 627                 if( is_null( $this->mTargetObj ) ) {
 628                 # Not all users can just browse every deleted page from the list
 629                         if( $wgUser->isAllowed( 'browsearchive' ) ) {
 630                                 $this->showSearchForm();
 631
 632                                 # List undeletable articles
 633                                 if( $this->mSearchPrefix ) {
 634                                         $result = PageArchive::listPagesByPrefix( $this->mSearchPrefix );
 635                                         $this->showList( $result );
 636                                 }
 637                         } else {
 638                                 $wgOut->addWikiMsg( 'undelete-header' );
 639                         }
 640                         return;
 641                 }
 642                 if( $this->mTimestamp !== '' ) {
 643                         return $this->showRevision( $this->mTimestamp );
 644                 }
 645                 if( $this->mFile !== null ) {
 646                         $file = new ArchivedFile( $this->mTargetObj, '', $this->mFile );
 647                         // Check if user is allowed to see this file
 648                         if ( !$file->exists() ) {
 649                                 $wgOut->addWikiMsg( 'filedelete-nofile', $this->mFile );
 650                                 return;
 651                         } else if( !$file->userCan( File::DELETED_FILE ) ) {
 652                                 if( $file->isDeleted( File::DELETED_RESTRICTED ) ) {
 653                                         $wgOut->permissionRequired( 'suppressrevision' );
 654                                 } else {
 655                                         $wgOut->permissionRequired( 'deletedtext' );
 656                                 }
 657                                 return false;
 658                         } elseif ( !$wgUser->matchEditToken( $this->mToken, $this->mFile ) ) {
 659                                 $this->showFileConfirmationForm( $this->mFile );
 660                                 return false;
 661                         } else {
 662                                 return $this->showFile( $this->mFile );
 663                         }
 664                 }
 665                 if( $this->mRestore && $this->mAction == "submit" ) {
 666                         global $wgUploadMaintenance;
 667                         if( $wgUploadMaintenance && $this->mTargetObj && $this->mTargetObj->getNamespace() == NS_FILE ) {
 668                                 $wgOut->wrapWikiMsg( "<div class='error'>\n$1\n</div>\n", array( 'filedelete-maintenance' ) );
 669                                 return;
 670                         }
 671                         return $this->undelete();
 672                 }
 673                 if( $this->mInvert && $this->mAction == "submit" ) {
 674                         return $this->showHistory( );
 675                 }
 676                 return $this->showHistory();
 677         }
 678
 679         function showSearchForm() {
 680                 global $wgOut, $wgScript;
 681                 $wgOut->addWikiMsg( 'undelete-header' );
 682
 683                 $wgOut->addHTML(
 684                         Xml::openElement( 'form', array(
 685                                 'method' => 'get',
 686                                 'action' => $wgScript ) ) .
 687                         Xml::fieldset( wfMsg( 'undelete-search-box' ) ) .
 688                         Xml::hidden( 'title',
 689                                 SpecialPage::getTitleFor( 'Undelete' )->getPrefixedDbKey() ) .
 690                         Xml::inputLabel( wfMsg( 'undelete-search-prefix' ),
 691                                 'prefix', 'prefix', 20,
 692                                 $this->mSearchPrefix ) . ' ' .
 693                         Xml::submitButton( wfMsg( 'undelete-search-submit' ) ) .
 694                         Xml::closeElement( 'fieldset' ) .
 695                         Xml::closeElement( 'form' )
 696                 );
 697         }
 698
 699         // Generic list of deleted pages
 700         private function showList( $result ) {
 701                 global $wgLang, $wgContLang, $wgUser, $wgOut;
 702
 703                 if( $result->numRows() == 0 ) {
 704                         $wgOut->addWikiMsg( 'undelete-no-results' );
 705                         return;
 706                 }
 707
 708                 $wgOut->addWikiMsg( 'undeletepagetext', $wgLang->formatNum( $result->numRows() ) );
 709
 710                 $sk = $wgUser->getSkin();
 711                 $undelete = SpecialPage::getTitleFor( 'Undelete' );
 712                 $wgOut->addHTML( "<ul>\n" );
 713                 while( $row = $result->fetchObject() ) {
 714                         $title = Title::makeTitleSafe( $row->ar_namespace, $row->ar_title );
 715                         $link = $sk->linkKnown(
 716                                 $undelete,
 717                                 htmlspecialchars( $title->getPrefixedText() ),
 718                                 array(),
 719                                 array( 'target' => $title->getPrefixedText() )
 720                         );
 721                         $revs = wfMsgExt( 'undeleterevisions',
 722                                 array( 'parseinline' ),
 723                                 $wgLang->formatNum( $row->count ) );
 724                         $wgOut->addHTML( "<li>{$link} ({$revs})</li>\n" );
 725                 }
 726                 $result->free();
 727                 $wgOut->addHTML( "</ul>\n" );
 728
 729                 return true;
 730         }
 731
 732         private function showRevision( $timestamp ) {
 733                 global $wgLang, $wgUser, $wgOut;
 734                 $self = SpecialPage::getTitleFor( 'Undelete' );
 735                 $skin = $wgUser->getSkin();
 736
 737                 if(!preg_match("/[0-9]{14}/",$timestamp)) return 0;
 738
 739                 $archive = new PageArchive( $this->mTargetObj );
 740                 $rev = $archive->getRevision( $timestamp );
 741
 742                 if( !$rev ) {
 743                         $wgOut->addWikiMsg( 'undeleterevision-missing' );
 744                         return;
 745                 }
 746
 747                 if( $rev->isDeleted(Revision::DELETED_TEXT) ) {
 748                         if( !$rev->userCan(Revision::DELETED_TEXT) ) {
 749                                 $wgOut->wrapWikiMsg( "<div class='mw-warning plainlinks'>\n$1\n</div>\n", 'rev-deleted-text-permission' );
 750                                 return;
 751                         } else {
 752                                 $wgOut->wrapWikiMsg( "<div class='mw-warning plainlinks'>\n$1\n</div>\n", 'rev-deleted-text-view' );
 753                                 $wgOut->addHTML( '<br />' );
 754                                 // and we are allowed to see...
 755                         }
 756                 }
 757
 758                 $wgOut->setPageTitle( wfMsg( 'undeletepage' ) );
 759
 760                 $link = $skin->linkKnown(
 761                         SpecialPage::getTitleFor( 'Undelete', $this->mTargetObj->getPrefixedDBkey() ),
 762                         htmlspecialchars( $this->mTargetObj->getPrefixedText() )
 763                 );
 764
 765                 if( $this->mDiff ) {
 766                         $previousRev = $archive->getPreviousRevision( $timestamp );
 767                         if( $previousRev ) {
 768                                 $this->showDiff( $previousRev, $rev );
 769                                 if( $wgUser->getOption( 'diffonly' ) ) {
 770                                         return;
 771                                 } else {
 772                                         $wgOut->addHTML( '<hr />' );
 773                                 }
 774                         } else {
 775                                 $wgOut->addWikiMsg( 'undelete-nodiff' );
 776                         }
 777                 }
 778
 779                 // date and time are separate parameters to facilitate localisation.
 780                 // $time is kept for backward compat reasons.
 781                 $time = htmlspecialchars( $wgLang->timeAndDate( $timestamp, true ) );
 782                 $d = htmlspecialchars( $wgLang->date( $timestamp, true ) );
 783                 $t = htmlspecialchars( $wgLang->time( $timestamp, true ) );
 784                 $user = $skin->revUserTools( $rev );
 785
 786                 if( $this->mPreview ) {
 787                         $openDiv = '<div id="mw-undelete-revision" class="mw-warning">';
 788                 } else {
 789                         $openDiv = '<div id="mw-undelete-revision">';
 790                 }
 791
 792                 // Revision delete links
 793                 $canHide = $wgUser->isAllowed( 'deleterevision' );
 794                 if( $this->mDiff ) {
 795                         $revdlink = ''; // diffs already have revision delete links
 796                 } else if( $canHide || ($rev->getVisibility() && $wgUser->isAllowed('deletedhistory')) ) {
 797                         if( !$rev->userCan(Revision::DELETED_RESTRICTED ) ) {
 798                                 $revdlink = $skin->revDeleteLinkDisabled( $canHide ); // revision was hidden from sysops
 799                         } else {
 800                                 $query = array(
 801                                         'type'   => 'archive',
 802                                         'target' => $this->mTargetObj->getPrefixedDBkey(),
 803                                         'ids'    => $rev->getTimestamp()
 804                                 );
 805                                 $revdlink = $skin->revDeleteLink( $query,
 806                                         $rev->isDeleted( File::DELETED_RESTRICTED ), $canHide );
 807                         }
 808                 } else {
 809                         $revdlink = '';
 810                 }
 811
 812                 $wgOut->addHTML( $openDiv . $revdlink . wfMsgWikiHtml( 'undelete-revision', $link, $time, $user, $d, $t ) . '</div>' );
 813                 wfRunHooks( 'UndeleteShowRevision', array( $this->mTargetObj, $rev ) );
 814
 815                 if( $this->mPreview ) {
 816                         //Hide [edit]s
 817                         $popts = $wgOut->parserOptions();
 818                         $popts->setEditSection( false );
 819                         $wgOut->parserOptions( $popts );
 820                         $wgOut->addWikiTextTitleTidy( $rev->getText( Revision::FOR_THIS_USER ), $this->mTargetObj, true );
 821                 }
 822
 823                 $wgOut->addHTML(
 824                         Xml::element( 'textarea', array(
 825                                         'readonly' => 'readonly',
 826                                         'cols' => intval( $wgUser->getOption( 'cols' ) ),
 827                                         'rows' => intval( $wgUser->getOption( 'rows' ) ) ),
 828                                 $rev->getText( Revision::FOR_THIS_USER ) . "\n" ) .
 829                         Xml::openElement( 'div' ) .
 830                         Xml::openElement( 'form', array(
 831                                 'method' => 'post',
 832                                 'action' => $self->getLocalURL( array( 'action' => 'submit' ) ) ) ) .
 833                         Xml::element( 'input', array(
 834                                 'type' => 'hidden',
 835                                 'name' => 'target',
 836                                 'value' => $this->mTargetObj->getPrefixedDbKey() ) ) .
 837                         Xml::element( 'input', array(
 838                                 'type' => 'hidden',
 839                                 'name' => 'timestamp',
 840                                 'value' => $timestamp ) ) .
 841                         Xml::element( 'input', array(
 842                                 'type' => 'hidden',
 843                                 'name' => 'wpEditToken',
 844                                 'value' => $wgUser->editToken() ) ) .
 845                         Xml::element( 'input', array(
 846                                 'type' => 'submit',
 847                                 'name' => 'preview',
 848                                 'value' => wfMsg( 'showpreview' ) ) ) .
 849                         Xml::element( 'input', array(
 850                                 'name' => 'diff',
 851                                 'type' => 'submit',
 852                                 'value' => wfMsg( 'showdiff' ) ) ) .
 853                         Xml::closeElement( 'form' ) .
 854                         Xml::closeElement( 'div' ) );
 855         }
 856
 857         /**
 858          * Build a diff display between this and the previous either deleted
 859          * or non-deleted edit.
 860          *
 861          * @param $previousRev Revision
 862          * @param $currentRev Revision
 863          * @return String: HTML
 864          */
 865         function showDiff( $previousRev, $currentRev ) {
 866                 global $wgOut;
 867
 868                 $diffEngine = new DifferenceEngine( $previousRev->getTitle() );
 869                 $diffEngine->showDiffStyle();
 870                 $wgOut->addHTML(
 871                         "<div>" .
 872                         "<table border='0' width='98%' cellpadding='0' cellspacing='4' class='diff'>" .
 873                         "<col class='diff-marker' />" .
 874                         "<col class='diff-content' />" .
 875                         "<col class='diff-marker' />" .
 876                         "<col class='diff-content' />" .
 877                         "<tr>" .
 878                                 "<td colspan='2' width='50%' align='center' class='diff-otitle'>" .
 879                                 $this->diffHeader( $previousRev, 'o' ) .
 880                                 "</td>\n" .
 881                                 "<td colspan='2' width='50%' align='center' class='diff-ntitle'>" .
 882                                 $this->diffHeader( $currentRev, 'n' ) .
 883                                 "</td>\n" .
 884                         "</tr>" .
 885                         $diffEngine->generateDiffBody(
 886                                 $previousRev->getText(), $currentRev->getText() ) .
 887                         "</table>" .
 888                         "</div>\n"
 889                 );
 890         }
 891
 892         private function diffHeader( $rev, $prefix ) {
 893                 global $wgUser, $wgLang;
 894                 $sk = $wgUser->getSkin();
 895                 $isDeleted = !( $rev->getId() && $rev->getTitle() );
 896                 if( $isDeleted ) {
 897                         /// @todo Fixme: $rev->getTitle() is null for deleted revs...?
 898                         $targetPage = SpecialPage::getTitleFor( 'Undelete' );
 899                         $targetQuery = array(
 900                                 'target' => $this->mTargetObj->getPrefixedText(),
 901                                 'timestamp' => wfTimestamp( TS_MW, $rev->getTimestamp() )
 902                         );
 903                 } else {
 904                         /// @todo Fixme getId() may return non-zero for deleted revs...
 905                         $targetPage = $rev->getTitle();
 906                         $targetQuery = array( 'oldid' => $rev->getId() );
 907                 }
 908                 // Add show/hide deletion links if available
 909                 $canHide = $wgUser->isAllowed( 'deleterevision' );
 910                 if( $canHide || ($rev->getVisibility() && $wgUser->isAllowed('deletedhistory')) ) {
 911                         $del = ' ';
 912                         if( !$rev->userCan( Revision::DELETED_RESTRICTED ) ) {
 913                                 $del .= $sk->revDeleteLinkDisabled( $canHide ); // revision was hidden from sysops
 914                         } else {
 915                                 $query = array(
 916                                         'type'   => 'archive',
 917                                         'target' => $this->mTargetObj->getPrefixedDbkey(),
 918                                         'ids'    => $rev->getTimestamp()
 919                                 );
 920                                 $del .= $sk->revDeleteLink( $query,
 921                                         $rev->isDeleted( Revision::DELETED_RESTRICTED ), $canHide );
 922                         }
 923                 } else {
 924                         $del = '';
 925                 }
 926                 return
 927                         '<div id="mw-diff-'.$prefix.'title1"><strong>' .
 928                                 $sk->link(
 929                                         $targetPage,
 930                                         wfMsgHtml(
 931                                                 'revisionasof',
 932                                                 htmlspecialchars( $wgLang->timeanddate( $rev->getTimestamp(), true ) ),
 933                                                 htmlspecialchars( $wgLang->date( $rev->getTimestamp(), true ) ),
 934                                                 htmlspecialchars( $wgLang->time( $rev->getTimestamp(), true ) )
 935                                         ),
 936                                         array(),
 937                                         $targetQuery
 938                                 ) .
 939                         '</strong></div>' .
 940                         '<div id="mw-diff-'.$prefix.'title2">' .
 941                                 $sk->revUserTools( $rev ) . '<br />' .
 942                         '</div>' .
 943                         '<div id="mw-diff-'.$prefix.'title3">' .
 944                                 $sk->revComment( $rev ) . $del . '<br />' .
 945                         '</div>';
 946         }
 947
 948         /**
 949          * Show a form confirming whether a tokenless user really wants to see a file
 950          */
 951         private function showFileConfirmationForm( $key ) {
 952                 global $wgOut, $wgUser, $wgLang;
 953                 $file = new ArchivedFile( $this->mTargetObj, '', $this->mFile );
 954                 $wgOut->addWikiMsg( 'undelete-show-file-confirm',
 955                         $this->mTargetObj->getText(),
 956                         $wgLang->date( $file->getTimestamp() ),
 957                         $wgLang->time( $file->getTimestamp() ) );
 958                 $wgOut->addHTML(
 959                         Xml::openElement( 'form', array(
 960                                 'method' => 'POST',
 961                                 'action' => SpecialPage::getTitleFor( 'Undelete' )->getLocalUrl(
 962                                         'target=' . urlencode( $this->mTarget ) .
 963                                         '&file=' . urlencode( $key ) .
 964                                         '&token=' . urlencode( $wgUser->editToken( $key ) ) )
 965                                 )
 966                         ) .
 967                         Xml::submitButton( wfMsg( 'undelete-show-file-submit' ) ) .
 968                         '</form>'
 969                 );
 970         }
 971
 972         /**
 973          * Show a deleted file version requested by the visitor.
 974          */
 975         private function showFile( $key ) {
 976                 global $wgOut, $wgRequest;
 977                 $wgOut->disable();
 978
 979                 # We mustn't allow the output to be Squid cached, otherwise
 980                 # if an admin previews a deleted image, and it's cached, then
 981                 # a user without appropriate permissions can toddle off and
 982                 # nab the image, and Squid will serve it
 983                 $wgRequest->response()->header( 'Expires: ' . gmdate( 'D, d M Y H:i:s', 0 ) . ' GMT' );
 984                 $wgRequest->response()->header( 'Cache-Control: no-cache, no-store, max-age=0, must-revalidate' );
 985                 $wgRequest->response()->header( 'Pragma: no-cache' );
 986
 987                 global $IP;
 988                 require_once( "$IP/includes/StreamFile.php" );
 989                 $repo = RepoGroup::singleton()->getLocalRepo();
 990                 $path = $repo->getZonePath( 'deleted' ) . '/' . $repo->getDeletedHashPath( $key ) . $key;
 991                 wfStreamFile( $path );
 992         }
 993
 994         private function showHistory( ) {
 995                 global $wgLang, $wgUser, $wgOut;
 996
 997                 $sk = $wgUser->getSkin();
 998                 if( $this->mAllowed ) {
 999                         $wgOut->setPagetitle( wfMsg( "undeletepage" ) );
1000                 } else {
1001                         $wgOut->setPagetitle( wfMsg( 'viewdeletedpage' ) );
1002                 }
1003
1004                 $wgOut->wrapWikiMsg(  "<div class='mw-undelete-pagetitle'>\n$1\n</div>\n", array ( 'undeletepagetitle', $this->mTargetObj->getPrefixedText() ) );
1005
1006                 $archive = new PageArchive( $this->mTargetObj );
1007                 /*
1008                 $text = $archive->getLastRevisionText();
1009                 if( is_null( $text ) ) {
1010                         $wgOut->addWikiMsg( "nohistory" );
1011                         return;
1012                 }
1013                 */
1014                 $wgOut->addHTML( '<div class="mw-undelete-history">' );
1015                 if ( $this->mAllowed ) {
1016                         $wgOut->addWikiMsg( "undeletehistory" );
1017                         $wgOut->addWikiMsg( "undeleterevdel" );
1018                 } else {
1019                         $wgOut->addWikiMsg( "undeletehistorynoadmin" );
1020                 }
1021                 $wgOut->addHTML( '</div>' );
1022
1023                 # List all stored revisions
1024                 $revisions = $archive->listRevisions();
1025                 $files = $archive->listFiles();
1026
1027                 $haveRevisions = $revisions && $revisions->numRows() > 0;
1028                 $haveFiles = $files && $files->numRows() > 0;
1029
1030                 # Batch existence check on user and talk pages
1031                 if( $haveRevisions ) {
1032                         $batch = new LinkBatch();
1033                         while( $row = $revisions->fetchObject() ) {
1034                                 $batch->addObj( Title::makeTitleSafe( NS_USER, $row->ar_user_text ) );
1035                                 $batch->addObj( Title::makeTitleSafe( NS_USER_TALK, $row->ar_user_text ) );
1036                         }
1037                         $batch->execute();
1038                         $revisions->seek( 0 );
1039                 }
1040                 if( $haveFiles ) {
1041                         $batch = new LinkBatch();
1042                         while( $row = $files->fetchObject() ) {
1043                                 $batch->addObj( Title::makeTitleSafe( NS_USER, $row->fa_user_text ) );
1044                                 $batch->addObj( Title::makeTitleSafe( NS_USER_TALK, $row->fa_user_text ) );
1045                         }
1046                         $batch->execute();
1047                         $files->seek( 0 );
1048                 }
1049
1050                 if ( $this->mAllowed ) {
1051                         $titleObj = SpecialPage::getTitleFor( "Undelete" );
1052                         $action = $titleObj->getLocalURL( array( 'action' => 'submit' ) );
1053                         # Start the form here
1054                         $top = Xml::openElement( 'form', array( 'method' => 'post', 'action' => $action, 'id' => 'undelete' ) );
1055                         $wgOut->addHTML( $top );
1056                 }
1057
1058                 # Show relevant lines from the deletion log:
1059                 $wgOut->addHTML( Xml::element( 'h2', null, LogPage::logName( 'delete' ) ) . "\n" );
1060                 LogEventsList::showLogExtract( $wgOut, 'delete', $this->mTargetObj->getPrefixedText() );
1061                 # Show relevant lines from the suppression log:
1062                 if( $wgUser->isAllowed( 'suppressionlog' ) ) {
1063                         $wgOut->addHTML( Xml::element( 'h2', null, LogPage::logName( 'suppress' ) ) . "\n" );
1064                         LogEventsList::showLogExtract( $wgOut, 'suppress', $this->mTargetObj->getPrefixedText() );
1065                 }
1066
1067                 if( $this->mAllowed && ( $haveRevisions || $haveFiles ) ) {
1068                         # Format the user-visible controls (comment field, submission button)
1069                         # in a nice little table
1070                         if( $wgUser->isAllowed( 'suppressrevision' ) ) {
1071                                 $unsuppressBox =
1072                                         "<tr>
1073                                                 <td>&#160;</td>
1074                                                 <td class='mw-input'>" .
1075                                                         Xml::checkLabel( wfMsg('revdelete-unsuppress'), 'wpUnsuppress',
1076                                                                 'mw-undelete-unsuppress', $this->mUnsuppress ).
1077                                                 "</td>
1078                                         </tr>";
1079                         } else {
1080                                 $unsuppressBox = "";
1081                         }
1082                         $table =
1083                                 Xml::fieldset( wfMsg( 'undelete-fieldset-title' ) ) .
1084                                 Xml::openElement( 'table', array( 'id' => 'mw-undelete-table' ) ) .
1085                                         "<tr>
1086                                                 <td colspan='2' class='mw-undelete-extrahelp'>" .
1087                                                         wfMsgWikiHtml( 'undeleteextrahelp' ) .
1088                                                 "</td>
1089                                         </tr>
1090                                         <tr>
1091                                                 <td class='mw-label'>" .
1092                                                         Xml::label( wfMsg( 'undeletecomment' ), 'wpComment' ) .
1093                                                 "</td>
1094                                                 <td class='mw-input'>" .
1095                                                         Xml::input( 'wpComment', 50, $this->mComment, array( 'id' =>  'wpComment' ) ) .
1096                                                 "</td>
1097                                         </tr>
1098                                         <tr>
1099                                                 <td>&#160;</td>
1100                                                 <td class='mw-submit'>" .
1101                                                         Xml::submitButton( wfMsg( 'undeletebtn' ), array( 'name' => 'restore', 'id' => 'mw-undelete-submit' ) ) . ' ' .
1102                                                         Xml::element( 'input', array( 'type' => 'reset', 'value' => wfMsg( 'undeletereset' ), 'id' => 'mw-undelete-reset' ) ) . ' ' .
1103                                                         Xml::submitButton( wfMsg( 'undeleteinvert' ), array( 'name' => 'invert', 'id' => 'mw-undelete-invert' ) ) .
1104                                                 "</td>
1105                                         </tr>" .
1106                                         $unsuppressBox .
1107                                 Xml::closeElement( 'table' ) .
1108                                 Xml::closeElement( 'fieldset' );
1109
1110                         $wgOut->addHTML( $table );
1111                 }
1112
1113                 $wgOut->addHTML( Xml::element( 'h2', null, wfMsg( 'history' ) ) . "\n" );
1114
1115                 if( $haveRevisions ) {
1116                         # The page's stored (deleted) history:
1117                         $wgOut->addHTML("<ul>");
1118                         $target = urlencode( $this->mTarget );
1119                         $remaining = $revisions->numRows();
1120                         $earliestLiveTime = $this->mTargetObj->getEarliestRevTime();
1121
1122                         while( $row = $revisions->fetchObject() ) {
1123                                 $remaining--;
1124                                 $wgOut->addHTML( $this->formatRevisionRow( $row, $earliestLiveTime, $remaining, $sk ) );
1125                         }
1126                         $revisions->free();
1127                         $wgOut->addHTML("</ul>");
1128                 } else {
1129                         $wgOut->addWikiMsg( "nohistory" );
1130                 }
1131
1132                 if( $haveFiles ) {
1133                         $wgOut->addHTML( Xml::element( 'h2', null, wfMsg( 'filehist' ) ) . "\n" );
1134                         $wgOut->addHTML( "<ul>" );
1135                         while( $row = $files->fetchObject() ) {
1136                                 $wgOut->addHTML( $this->formatFileRow( $row, $sk ) );
1137                         }
1138                         $files->free();
1139                         $wgOut->addHTML( "</ul>" );
1140                 }
1141
1142                 if ( $this->mAllowed ) {
1143                         # Slip in the hidden controls here
1144                         $misc  = Xml::hidden( 'target', $this->mTarget );
1145                         $misc .= Xml::hidden( 'wpEditToken', $wgUser->editToken() );
1146                         $misc .= Xml::closeElement( 'form' );
1147                         $wgOut->addHTML( $misc );
1148                 }
1149
1150                 return true;
1151         }
1152
1153         private function formatRevisionRow( $row, $earliestLiveTime, $remaining, $sk ) {
1154                 global $wgUser, $wgLang;
1155
1156                 $rev = Revision::newFromArchiveRow( $row,
1157                         array( 'page' => $this->mTargetObj->getArticleId() ) );
1158                 $stxt = '';
1159                 $ts = wfTimestamp( TS_MW, $row->ar_timestamp );
1160                 // Build checkboxen...
1161                 if( $this->mAllowed ) {
1162                         if( $this->mInvert ) {
1163                                 if( in_array( $ts, $this->mTargetTimestamp ) ) {
1164                                         $checkBox = Xml::check( "ts$ts");
1165                                 } else {
1166                                         $checkBox = Xml::check( "ts$ts", true );
1167                                 }
1168                         } else {
1169                                 $checkBox = Xml::check( "ts$ts" );
1170                         }
1171                 } else {
1172                         $checkBox = '';
1173                 }
1174                 // Build page & diff links...
1175                 if( $this->mCanView ) {
1176                         $titleObj = SpecialPage::getTitleFor( "Undelete" );
1177                         # Last link
1178                         if( !$rev->userCan( Revision::DELETED_TEXT ) ) {
1179                                 $pageLink = htmlspecialchars( $wgLang->timeanddate( $ts, true ) );
1180                                 $last = wfMsgHtml('diff');
1181                         } else if( $remaining > 0 || ($earliestLiveTime && $ts > $earliestLiveTime) ) {
1182                                 $pageLink = $this->getPageLink( $rev, $titleObj, $ts, $sk );
1183                                 $last = $sk->linkKnown(
1184                                         $titleObj,
1185                                         wfMsgHtml('diff'),
1186                                         array(),
1187                                         array(
1188                                                 'target' => $this->mTargetObj->getPrefixedText(),
1189                                                 'timestamp' => $ts,
1190                                                 'diff' => 'prev'
1191                                         )
1192                                 );
1193                         } else {
1194                                 $pageLink = $this->getPageLink( $rev, $titleObj, $ts, $sk );
1195                                 $last = wfMsgHtml('diff');
1196                         }
1197                 } else {
1198                         $pageLink = htmlspecialchars( $wgLang->timeanddate( $ts, true ) );
1199                         $last = wfMsgHtml('diff');
1200                 }
1201                 // User links
1202                 $userLink = $sk->revUserTools( $rev );
1203                 // Revision text size
1204                 if( !is_null($size = $row->ar_len) ) {
1205                         $stxt = $sk->formatRevisionSize( $size );
1206                 }
1207                 // Edit summary
1208                 $comment = $sk->revComment( $rev );
1209                 // Revision delete links
1210                 $canHide = $wgUser->isAllowed( 'deleterevision' );
1211                 if( $canHide || ($rev->getVisibility() && $wgUser->isAllowed('deletedhistory')) ) {
1212                         if( !$rev->userCan( Revision::DELETED_RESTRICTED ) ) {
1213                                 $revdlink = $sk->revDeleteLinkDisabled( $canHide ); // revision was hidden from sysops
1214                         } else {
1215                                 $query = array(
1216                                         'type'   => 'archive',
1217                                         'target' => $this->mTargetObj->getPrefixedDBkey(),
1218                                         'ids'    => $ts
1219                                 );
1220                                 $revdlink = $sk->revDeleteLink( $query,
1221                                         $rev->isDeleted( Revision::DELETED_RESTRICTED ), $canHide );
1222                         }
1223                 } else {
1224                         $revdlink = '';
1225                 }
1226                 return "<li>$checkBox $revdlink ($last) $pageLink . . $userLink $stxt $comment</li>";
1227         }
1228
1229         private function formatFileRow( $row, $sk ) {
1230                 global $wgUser, $wgLang;
1231
1232                 $file = ArchivedFile::newFromRow( $row );
1233
1234                 $ts = wfTimestamp( TS_MW, $row->fa_timestamp );
1235                 if( $this->mAllowed && $row->fa_storage_key ) {
1236                         $checkBox = Xml::check( "fileid" . $row->fa_id );
1237                         $key = urlencode( $row->fa_storage_key );
1238                         $target = urlencode( $this->mTarget );
1239                         $titleObj = SpecialPage::getTitleFor( "Undelete" );
1240                         $pageLink = $this->getFileLink( $file, $titleObj, $ts, $key, $sk );
1241                 } else {
1242                         $checkBox = '';
1243                         $pageLink = $wgLang->timeanddate( $ts, true );
1244                 }
1245                 $userLink = $this->getFileUser( $file, $sk );
1246                 $data =
1247                         wfMsg( 'widthheight',
1248                                 $wgLang->formatNum( $row->fa_width ),
1249                                 $wgLang->formatNum( $row->fa_height ) ) .
1250                         ' (' .
1251                         wfMsg( 'nbytes', $wgLang->formatNum( $row->fa_size ) ) .
1252                         ')';
1253                 $data = htmlspecialchars( $data );
1254                 $comment = $this->getFileComment( $file, $sk );
1255                 // Add show/hide deletion links if available
1256                 $canHide = $wgUser->isAllowed( 'deleterevision' );
1257                 if( $canHide || ($file->getVisibility() && $wgUser->isAllowed('deletedhistory')) ) {
1258                         if( !$file->userCan(File::DELETED_RESTRICTED ) ) {
1259                                 $revdlink = $sk->revDeleteLinkDisabled( $canHide ); // revision was hidden from sysops
1260                         } else {
1261                                 $query = array(
1262                                         'type' => 'filearchive',
1263                                         'target' => $this->mTargetObj->getPrefixedDBkey(),
1264                                         'ids' => $row->fa_id
1265                                 );
1266                                 $revdlink = $sk->revDeleteLink( $query,
1267                                         $file->isDeleted( File::DELETED_RESTRICTED ), $canHide );
1268                         }
1269                 } else {
1270                         $revdlink = '';
1271                 }
1272                 return "<li>$checkBox $revdlink $pageLink . . $userLink $data $comment</li>\n";
1273         }
1274
1275         /**
1276          * Fetch revision text link if it's available to all users
1277          * @return string
1278          */
1279         function getPageLink( $rev, $titleObj, $ts, $sk ) {
1280                 global $wgLang;
1281
1282                 $time = htmlspecialchars( $wgLang->timeanddate( $ts, true ) );
1283
1284                 if( !$rev->userCan(Revision::DELETED_TEXT) ) {
1285                         return '<span class="history-deleted">' . $time . '</span>';
1286                 } else {
1287                         $link = $sk->linkKnown(
1288                                 $titleObj,
1289                                 $time,
1290                                 array(),
1291                                 array(
1292                                         'target' => $this->mTargetObj->getPrefixedText(),
1293                                         'timestamp' => $ts
1294                                 )
1295                         );
1296                         if( $rev->isDeleted(Revision::DELETED_TEXT) )
1297                                 $link = '<span class="history-deleted">' . $link . '</span>';
1298                         return $link;
1299                 }
1300         }
1301
1302         /**
1303          * Fetch image view link if it's available to all users
1304          *
1305          * @return String: HTML fragment
1306          */
1307         function getFileLink( $file, $titleObj, $ts, $key, $sk ) {
1308                 global $wgLang, $wgUser;
1309
1310                 if( !$file->userCan(File::DELETED_FILE) ) {
1311                         return '<span class="history-deleted">' . $wgLang->timeanddate( $ts, true ) . '</span>';
1312                 } else {
1313                         $link = $sk->linkKnown(
1314                                 $titleObj,
1315                                 $wgLang->timeanddate( $ts, true ),
1316                                 array(),
1317                                 array(
1318                                         'target' => $this->mTargetObj->getPrefixedText(),
1319                                         'file' => $key,
1320                                         'token' => $wgUser->editToken( $key )
1321                                 )
1322                         );
1323                         if( $file->isDeleted(File::DELETED_FILE) )
1324                                 $link = '<span class="history-deleted">' . $link . '</span>';
1325                         return $link;
1326                 }
1327         }
1328
1329         /**
1330          * Fetch file's user id if it's available to this user
1331          *
1332          * @return String: HTML fragment
1333          */
1334         function getFileUser( $file, $sk ) {
1335                 if( !$file->userCan(File::DELETED_USER) ) {
1336                         return '<span class="history-deleted">' . wfMsgHtml( 'rev-deleted-user' ) . '</span>';
1337                 } else {
1338                         $link = $sk->userLink( $file->getRawUser(), $file->getRawUserText() ) .
1339                                 $sk->userToolLinks( $file->getRawUser(), $file->getRawUserText() );
1340                         if( $file->isDeleted(File::DELETED_USER) )
1341                                 $link = '<span class="history-deleted">' . $link . '</span>';
1342                         return $link;
1343                 }
1344         }
1345
1346         /**
1347          * Fetch file upload comment if it's available to this user
1348          *
1349          * @return String: HTML fragment
1350          */
1351         function getFileComment( $file, $sk ) {
1352                 if( !$file->userCan(File::DELETED_COMMENT) ) {
1353                         return '<span class="history-deleted"><span class="comment">' . wfMsgHtml( 'rev-deleted-comment' ) . '</span></span>';
1354                 } else {
1355                         $link = $sk->commentBlock( $file->getRawDescription() );
1356                         if( $file->isDeleted(File::DELETED_COMMENT) )
1357                                 $link = '<span class="history-deleted">' . $link . '</span>';
1358                         return $link;
1359                 }
1360         }
1361
1362         function undelete() {
1363                 global $wgOut, $wgUser;
1364                 if ( wfReadOnly() ) {
1365                         $wgOut->readOnlyPage();
1366                         return;
1367                 }
1368                 if( !is_null( $this->mTargetObj ) ) {
1369                         $archive = new PageArchive( $this->mTargetObj );
1370                         $ok = $archive->undelete(
1371                                 $this->mTargetTimestamp,
1372                                 $this->mComment,
1373                                 $this->mFileVersions,
1374                                 $this->mUnsuppress );
1375
1376                         if( is_array($ok) ) {
1377                                 if ( $ok[1] ) // Undeleted file count
1378                                         wfRunHooks( 'FileUndeleteComplete', array(
1379                                                 $this->mTargetObj, $this->mFileVersions,
1380                                                 $wgUser, $this->mComment) );
1381
1382                                 $skin = $wgUser->getSkin();
1383                                 $link = $skin->linkKnown( $this->mTargetObj );
1384                                 $wgOut->addHTML( wfMsgWikiHtml( 'undeletedpage', $link ) );
1385                         } else {
1386                                 $wgOut->showFatalError( wfMsg( "cannotundelete" ) );
1387                                 $wgOut->addHTML( '<p>' . wfMsgHtml( "undeleterevdel" ) . '</p>' );
1388                         }
1389
1390                         // Show file deletion warnings and errors
1391                         $status = $archive->getFileStatus();
1392                         if( $status && !$status->isGood() ) {
1393                                 $wgOut->addWikiText( $status->getWikiText( 'undelete-error-short', 'undelete-error-long' ) );
1394                         }
1395                 } else {
1396                         $wgOut->showFatalError( wfMsg( "cannotundelete" ) );
1397                 }
1398                 return false;
1399         }
1400 }