includes/specials/SpecialUndelete.php

   1 <?php
   2
   3 /**
   4  * Used to show archived pages and eventually restore them.
   5  * @ingroup SpecialPage
   6  */
   7 class PageArchive {
   8         protected $title;
   9         var $fileStatus;
  10
  11         function __construct( $title ) {
  12                 if( is_null( $title ) ) {
  13                         throw new MWException( __METHOD__ . ' given a null title.' );
  14                 }
  15                 $this->title = $title;
  16         }
  17
  18         /**
  19          * List all deleted pages recorded in the archive table. Returns result
  20          * wrapper with (ar_namespace, ar_title, count) fields, ordered by page
  21          * namespace/title.
  22          *
  23          * @return ResultWrapper
  24          */
  25         public static function listAllPages() {
  26                 $dbr = wfGetDB( DB_SLAVE );
  27                 return self::listPages( $dbr, '' );
  28         }
  29
  30         /**
  31          * List deleted pages recorded in the archive table matching the
  32          * given title prefix.
  33          * Returns result wrapper with (ar_namespace, ar_title, count) fields.
  34          *
  35          * @param $prefix String: title prefix
  36          * @return ResultWrapper
  37          */
  38         public static function listPagesByPrefix( $prefix ) {
  39                 $dbr = wfGetDB( DB_SLAVE );
  40
  41                 $title = Title::newFromText( $prefix );
  42                 if( $title ) {
  43                         $ns = $title->getNamespace();
  44                         $prefix = $title->getDBkey();
  45                 } else {
  46                         // Prolly won't work too good
  47                         // @todo handle bare namespace names cleanly?
  48                         $ns = 0;
  49                 }
  50                 $conds = array(
  51                         'ar_namespace' => $ns,
  52                         'ar_title' . $dbr->buildLike( $prefix, $dbr->anyString() ),
  53                 );
  54                 return self::listPages( $dbr, $conds );
  55         }
  56
  57         protected static function listPages( $dbr, $condition ) {
  58                 return $dbr->resultObject(
  59                         $dbr->select(
  60                                 array( 'archive' ),
  61                                 array(
  62                                         'ar_namespace',
  63                                         'ar_title',
  64                                         'COUNT(*) AS count'
  65                                 ),
  66                                 $condition,
  67                                 __METHOD__,
  68                                 array(
  69                                         'GROUP BY' => 'ar_namespace,ar_title',
  70                                         'ORDER BY' => 'ar_namespace,ar_title',
  71                                         'LIMIT' => 100,
  72                                 )
  73                         )
  74                 );
  75         }
  76
  77         /**
  78          * List the revisions of the given page. Returns result wrapper with
  79          * (ar_minor_edit, ar_timestamp, ar_user, ar_user_text, ar_comment) fields.
  80          *
  81          * @return ResultWrapper
  82          */
  83         function listRevisions() {
  84                 $dbr = wfGetDB( DB_SLAVE );
  85                 $res = $dbr->select( 'archive',
  86                         array( 'ar_minor_edit', 'ar_timestamp', 'ar_user', 'ar_user_text', 'ar_comment', 'ar_len', 'ar_deleted' ),
  87                         array( 'ar_namespace' => $this->title->getNamespace(),
  88                                'ar_title' => $this->title->getDBkey() ),
  89                         'PageArchive::listRevisions',
  90                         array( 'ORDER BY' => 'ar_timestamp DESC' ) );
  91                 $ret = $dbr->resultObject( $res );
  92                 return $ret;
  93         }
  94
  95         /**
  96          * List the deleted file revisions for this page, if it's a file page.
  97          * Returns a result wrapper with various filearchive fields, or null
  98          * if not a file page.
  99          *
 100          * @return ResultWrapper
 101          * @todo Does this belong in Image for fuller encapsulation?
 102          */
 103         function listFiles() {
 104                 if( $this->title->getNamespace() == NS_FILE ) {
 105                         $dbr = wfGetDB( DB_SLAVE );
 106                         $res = $dbr->select( 'filearchive',
 107                                 array(
 108                                         'fa_id',
 109                                         'fa_name',
 110                                         'fa_archive_name',
 111                                         'fa_storage_key',
 112                                         'fa_storage_group',
 113                                         'fa_size',
 114                                         'fa_width',
 115                                         'fa_height',
 116                                         'fa_bits',
 117                                         'fa_metadata',
 118                                         'fa_media_type',
 119                                         'fa_major_mime',
 120                                         'fa_minor_mime',
 121                                         'fa_description',
 122                                         'fa_user',
 123                                         'fa_user_text',
 124                                         'fa_timestamp',
 125                                         'fa_deleted' ),
 126                                 array( 'fa_name' => $this->title->getDBkey() ),
 127                                 __METHOD__,
 128                                 array( 'ORDER BY' => 'fa_timestamp DESC' ) );
 129                         $ret = $dbr->resultObject( $res );
 130                         return $ret;
 131                 }
 132                 return null;
 133         }
 134
 135         /**
 136          * Fetch (and decompress if necessary) the stored text for the deleted
 137          * revision of the page with the given timestamp.
 138          *
 139          * @param $timestamp String
 140          * @return String
 141          * @deprecated Use getRevision() for more flexible information
 142          */
 143         function getRevisionText( $timestamp ) {
 144                 $rev = $this->getRevision( $timestamp );
 145                 return $rev ? $rev->getText() : null;
 146         }
 147
 148         /**
 149          * Return a Revision object containing data for the deleted revision.
 150          * Note that the result *may* or *may not* have a null page ID.
 151          *
 152          * @param $timestamp String
 153          * @return Revision
 154          */
 155         function getRevision( $timestamp ) {
 156                 $dbr = wfGetDB( DB_SLAVE );
 157                 $row = $dbr->selectRow( 'archive',
 158                         array(
 159                                 'ar_rev_id',
 160                                 'ar_text',
 161                                 'ar_comment',
 162                                 'ar_user',
 163                                 'ar_user_text',
 164                                 'ar_timestamp',
 165                                 'ar_minor_edit',
 166                                 'ar_flags',
 167                                 'ar_text_id',
 168                                 'ar_deleted',
 169                                 'ar_len' ),
 170                         array( 'ar_namespace' => $this->title->getNamespace(),
 171                                'ar_title' => $this->title->getDBkey(),
 172                                'ar_timestamp' => $dbr->timestamp( $timestamp ) ),
 173                         __METHOD__ );
 174                 if( $row ) {
 175                         return Revision::newFromArchiveRow( $row, array( 'page' => $this->title->getArticleId() ) );
 176                 } else {
 177                         return null;
 178                 }
 179         }
 180
 181         /**
 182          * Return the most-previous revision, either live or deleted, against
 183          * the deleted revision given by timestamp.
 184          *
 185          * May produce unexpected results in case of history merges or other
 186          * unusual time issues.
 187          *
 188          * @param $timestamp String
 189          * @return Revision or null
 190          */
 191         function getPreviousRevision( $timestamp ) {
 192                 $dbr = wfGetDB( DB_SLAVE );
 193
 194                 // Check the previous deleted revision...
 195                 $row = $dbr->selectRow( 'archive',
 196                         'ar_timestamp',
 197                         array( 'ar_namespace' => $this->title->getNamespace(),
 198                                'ar_title' => $this->title->getDBkey(),
 199                                'ar_timestamp < ' .
 200                                                 $dbr->addQuotes( $dbr->timestamp( $timestamp ) ) ),
 201                         __METHOD__,
 202                         array(
 203                                 'ORDER BY' => 'ar_timestamp DESC',
 204                                 'LIMIT' => 1 ) );
 205                 $prevDeleted = $row ? wfTimestamp( TS_MW, $row->ar_timestamp ) : false;
 206
 207                 $row = $dbr->selectRow( array( 'page', 'revision' ),
 208                         array( 'rev_id', 'rev_timestamp' ),
 209                         array(
 210                                 'page_namespace' => $this->title->getNamespace(),
 211                                 'page_title' => $this->title->getDBkey(),
 212                                 'page_id = rev_page',
 213                                 'rev_timestamp < ' .
 214                                                 $dbr->addQuotes( $dbr->timestamp( $timestamp ) ) ),
 215                         __METHOD__,
 216                         array(
 217                                 'ORDER BY' => 'rev_timestamp DESC',
 218                                 'LIMIT' => 1 ) );
 219                 $prevLive = $row ? wfTimestamp( TS_MW, $row->rev_timestamp ) : false;
 220                 $prevLiveId = $row ? intval( $row->rev_id ) : null;
 221
 222                 if( $prevLive && $prevLive > $prevDeleted ) {
 223                         // Most prior revision was live
 224                         return Revision::newFromId( $prevLiveId );
 225                 } elseif( $prevDeleted ) {
 226                         // Most prior revision was deleted
 227                         return $this->getRevision( $prevDeleted );
 228                 } else {
 229                         // No prior revision on this page.
 230                         return null;
 231                 }
 232         }
 233
 234         /**
 235          * Get the text from an archive row containing ar_text, ar_flags and ar_text_id
 236          *
 237          * @param $row Object: database row
 238          * @return Revision
 239          */
 240         function getTextFromRow( $row ) {
 241                 if( is_null( $row->ar_text_id ) ) {
 242                         // An old row from MediaWiki 1.4 or previous.
 243                         // Text is embedded in this row in classic compression format.
 244                         return Revision::getRevisionText( $row, "ar_" );
 245                 } else {
 246                         // New-style: keyed to the text storage backend.
 247                         $dbr = wfGetDB( DB_SLAVE );
 248                         $text = $dbr->selectRow( 'text',
 249                                 array( 'old_text', 'old_flags' ),
 250                                 array( 'old_id' => $row->ar_text_id ),
 251                                 __METHOD__ );
 252                         return Revision::getRevisionText( $text );
 253                 }
 254         }
 255
 256
 257         /**
 258          * Fetch (and decompress if necessary) the stored text of the most
 259          * recently edited deleted revision of the page.
 260          *
 261          * If there are no archived revisions for the page, returns NULL.
 262          *
 263          * @return String
 264          */
 265         function getLastRevisionText() {
 266                 $dbr = wfGetDB( DB_SLAVE );
 267                 $row = $dbr->selectRow( 'archive',
 268                         array( 'ar_text', 'ar_flags', 'ar_text_id' ),
 269                         array( 'ar_namespace' => $this->title->getNamespace(),
 270                                'ar_title' => $this->title->getDBkey() ),
 271                         __METHOD__,
 272                         array( 'ORDER BY' => 'ar_timestamp DESC' ) );
 273                 if( $row ) {
 274                         return $this->getTextFromRow( $row );
 275                 } else {
 276                         return null;
 277                 }
 278         }
 279
 280         /**
 281          * Quick check if any archived revisions are present for the page.
 282          *
 283          * @return Boolean
 284          */
 285         function isDeleted() {
 286                 $dbr = wfGetDB( DB_SLAVE );
 287                 $n = $dbr->selectField( 'archive', 'COUNT(ar_title)',
 288                         array( 'ar_namespace' => $this->title->getNamespace(),
 289                                'ar_title' => $this->title->getDBkey() ) );
 290                 return ($n > 0);
 291         }
 292
 293         /**
 294          * Restore the given (or all) text and file revisions for the page.
 295          * Once restored, the items will be removed from the archive tables.
 296          * The deletion log will be updated with an undeletion notice.
 297          *
 298          * @param $timestamps Array: pass an empty array to restore all revisions, otherwise list the ones to undelete.
 299          * @param $comment String
 300          * @param $fileVersions Array
 301          * @param $unsuppress Boolean
 302          *
 303          * @return array(number of file revisions restored, number of image revisions restored, log message)
 304          * on success, false on failure
 305          */
 306         function undelete( $timestamps, $comment = '', $fileVersions = array(), $unsuppress = false ) {
 307                 // If both the set of text revisions and file revisions are empty,
 308                 // restore everything. Otherwise, just restore the requested items.
 309                 $restoreAll = empty( $timestamps ) && empty( $fileVersions );
 310
 311                 $restoreText = $restoreAll || !empty( $timestamps );
 312                 $restoreFiles = $restoreAll || !empty( $fileVersions );
 313
 314                 if( $restoreFiles && $this->title->getNamespace() == NS_FILE ) {
 315                         $img = wfLocalFile( $this->title );
 316                         $this->fileStatus = $img->restore( $fileVersions, $unsuppress );
 317                         $filesRestored = $this->fileStatus->successCount;
 318                 } else {
 319                         $filesRestored = 0;
 320                 }
 321
 322                 if( $restoreText ) {
 323                         $textRestored = $this->undeleteRevisions( $timestamps, $unsuppress, $comment );
 324                         if($textRestored === false) // It must be one of UNDELETE_*
 325                                 return false;
 326                 } else {
 327                         $textRestored = 0;
 328                 }
 329
 330                 // Touch the log!
 331                 global $wgContLang;
 332                 $log = new LogPage( 'delete' );
 333
 334                 if( $textRestored && $filesRestored ) {
 335                         $reason = wfMsgExt( 'undeletedrevisions-files', array( 'content', 'parsemag' ),
 336                                 $wgContLang->formatNum( $textRestored ),
 337                                 $wgContLang->formatNum( $filesRestored ) );
 338                 } elseif( $textRestored ) {
 339                         $reason = wfMsgExt( 'undeletedrevisions', array( 'content', 'parsemag' ),
 340                                 $wgContLang->formatNum( $textRestored ) );
 341                 } elseif( $filesRestored ) {
 342                         $reason = wfMsgExt( 'undeletedfiles', array( 'content', 'parsemag' ),
 343                                 $wgContLang->formatNum( $filesRestored ) );
 344                 } else {
 345                         wfDebug( "Undelete: nothing undeleted...\n" );
 346                         return false;
 347                 }
 348
 349                 if( trim( $comment ) != '' )
 350                         $reason .= wfMsgForContent( 'colon-separator' ) . $comment;
 351                 $log->addEntry( 'restore', $this->title, $reason );
 352
 353                 return array($textRestored, $filesRestored, $reason);
 354         }
 355
 356         /**
 357          * This is the meaty bit -- restores archived revisions of the given page
 358          * to the cur/old tables. If the page currently exists, all revisions will
 359          * be stuffed into old, otherwise the most recent will go into cur.
 360          *
 361          * @param $timestamps Array: pass an empty array to restore all revisions, otherwise list the ones to undelete.
 362          * @param $comment String
 363          * @param $unsuppress Boolean: remove all ar_deleted/fa_deleted restrictions of seletected revs
 364          *
 365          * @return Mixed: number of revisions restored or false on failure
 366          */
 367         private function undeleteRevisions( $timestamps, $unsuppress = false, $comment = '' ) {
 368                 if ( wfReadOnly() )
 369                         return false;
 370                 $restoreAll = empty( $timestamps );
 371
 372                 $dbw = wfGetDB( DB_MASTER );
 373
 374                 # Does this page already exist? We'll have to update it...
 375                 $article = new Article( $this->title );
 376                 $options = 'FOR UPDATE'; // lock page
 377                 $page = $dbw->selectRow( 'page',
 378                         array( 'page_id', 'page_latest' ),
 379                         array( 'page_namespace' => $this->title->getNamespace(),
 380                                'page_title'     => $this->title->getDBkey() ),
 381                         __METHOD__,
 382                         $options
 383                 );
 384                 if( $page ) {
 385                         $makepage = false;
 386                         # Page already exists. Import the history, and if necessary
 387                         # we'll update the latest revision field in the record.
 388                         $newid             = 0;
 389                         $pageId            = $page->page_id;
 390                         $previousRevId    = $page->page_latest;
 391                         # Get the time span of this page
 392                         $previousTimestamp = $dbw->selectField( 'revision', 'rev_timestamp',
 393                                 array( 'rev_id' => $previousRevId ),
 394                                 __METHOD__ );
 395                         if( $previousTimestamp === false ) {
 396                                 wfDebug( __METHOD__.": existing page refers to a page_latest that does not exist\n" );
 397                                 return 0;
 398                         }
 399                 } else {
 400                         # Have to create a new article...
 401                         $makepage = true;
 402                         $previousRevId = 0;
 403                         $previousTimestamp = 0;
 404                 }
 405
 406                 if( $restoreAll ) {
 407                         $oldones = '1 = 1'; # All revisions...
 408                 } else {
 409                         $oldts = implode( ',',
 410                                 array_map( array( &$dbw, 'addQuotes' ),
 411                                         array_map( array( &$dbw, 'timestamp' ),
 412                                                 $timestamps ) ) );
 413
 414                         $oldones = "ar_timestamp IN ( {$oldts} )";
 415                 }
 416
 417                 /**
 418                  * Select each archived revision...
 419                  */
 420                 $result = $dbw->select( 'archive',
 421                         /* fields */ array(
 422                                 'ar_rev_id',
 423                                 'ar_text',
 424                                 'ar_comment',
 425                                 'ar_user',
 426                                 'ar_user_text',
 427                                 'ar_timestamp',
 428                                 'ar_minor_edit',
 429                                 'ar_flags',
 430                                 'ar_text_id',
 431                                 'ar_deleted',
 432                                 'ar_page_id',
 433                                 'ar_len' ),
 434                         /* WHERE */ array(
 435                                 'ar_namespace' => $this->title->getNamespace(),
 436                                 'ar_title'     => $this->title->getDBkey(),
 437                                 $oldones ),
 438                         __METHOD__,
 439                         /* options */ array( 'ORDER BY' => 'ar_timestamp' )
 440                 );
 441                 $ret = $dbw->resultObject( $result );
 442                 $rev_count = $dbw->numRows( $result );
 443                 if( !$rev_count ) {
 444                         wfDebug( __METHOD__.": no revisions to restore\n" );
 445                         return false; // ???
 446                 }
 447
 448                 $ret->seek( $rev_count - 1 ); // move to last
 449                 $row = $ret->fetchObject(); // get newest archived rev
 450                 $ret->seek( 0 ); // move back
 451
 452                 if( $makepage ) {
 453                         // Check the state of the newest to-be version...
 454                         if( !$unsuppress && ($row->ar_deleted & Revision::DELETED_TEXT) ) {
 455                                 return false; // we can't leave the current revision like this!
 456                         }
 457                         // Safe to insert now...
 458                         $newid  = $article->insertOn( $dbw );
 459                         $pageId = $newid;
 460                 } else {
 461                         // Check if a deleted revision will become the current revision...
 462                         if( $row->ar_timestamp > $previousTimestamp ) {
 463                                 // Check the state of the newest to-be version...
 464                                 if( !$unsuppress && ($row->ar_deleted & Revision::DELETED_TEXT) ) {
 465                                         return false; // we can't leave the current revision like this!
 466                                 }
 467                         }
 468                 }
 469
 470                 $revision = null;
 471                 $restored = 0;
 472
 473                 while( $row = $ret->fetchObject() ) {
 474                         // Check for key dupes due to shitty archive integrity.
 475                         if( $row->ar_rev_id ) {
 476                                 $exists = $dbw->selectField( 'revision', '1', array('rev_id' => $row->ar_rev_id), __METHOD__ );
 477                                 if( $exists ) continue; // don't throw DB errors
 478                         }
 479                         // Insert one revision at a time...maintaining deletion status
 480                         // unless we are specifically removing all restrictions...
 481                         $revision = Revision::newFromArchiveRow( $row,
 482                                 array(
 483                                         'page' => $pageId,
 484                                         'deleted' => $unsuppress ? 0 : $row->ar_deleted
 485                                 ) );
 486
 487                         $revision->insertOn( $dbw );
 488                         $restored++;
 489
 490                         wfRunHooks( 'ArticleRevisionUndeleted', array( &$this->title, $revision, $row->ar_page_id ) );
 491                 }
 492                 # Now that it's safely stored, take it out of the archive
 493                 $dbw->delete( 'archive',
 494                         /* WHERE */ array(
 495                                 'ar_namespace' => $this->title->getNamespace(),
 496                                 'ar_title' => $this->title->getDBkey(),
 497                                 $oldones ),
 498                         __METHOD__ );
 499
 500                 // Was anything restored at all?
 501                 if( $restored == 0 )
 502                         return 0;
 503
 504                 if( $revision ) {
 505                         // Attach the latest revision to the page...
 506                         $wasnew = $article->updateIfNewerOn( $dbw, $revision, $previousRevId );
 507                         if( $newid || $wasnew ) {
 508                                 // Update site stats, link tables, etc
 509                                 $article->createUpdates( $revision );
 510                         }
 511
 512                         if( $newid ) {
 513                                 wfRunHooks( 'ArticleUndelete', array( &$this->title, true, $comment ) );
 514                                 Article::onArticleCreate( $this->title );
 515                         } else {
 516                                 wfRunHooks( 'ArticleUndelete', array( &$this->title, false, $comment ) );
 517                                 Article::onArticleEdit( $this->title );
 518                         }
 519
 520                         if( $this->title->getNamespace() == NS_FILE ) {
 521                                 $update = new HTMLCacheUpdate( $this->title, 'imagelinks' );
 522                                 $update->doUpdate();
 523                         }
 524                 } else {
 525                         // Revision couldn't be created. This is very weird
 526                         return self::UNDELETE_UNKNOWNERR;
 527                 }
 528
 529                 return $restored;
 530         }
 531
 532         function getFileStatus() { return $this->fileStatus; }
 533 }
 534
 535 /**
 536  * Special page allowing users with the appropriate permissions to view
 537  * and restore deleted content.
 538  *
 539  * @ingroup SpecialPage
 540  */
 541 class UndeleteForm extends SpecialPage {
 542         var $mAction, $mTarget, $mTimestamp, $mRestore, $mInvert, $mTargetObj;
 543         var $mTargetTimestamp, $mAllowed, $mCanView, $mComment, $mToken, $mRequest;
 544
 545         function __construct( $request = null ) {
 546                 parent::__construct( 'Undelete', 'deletedhistory' );
 547
 548                 if ( $request === null ) {
 549                         global $wgRequest;
 550                         $this->mRequest = $wgRequest;
 551                 } else {
 552                         $this->mRequest = $request;
 553                 }
 554         }
 555
 556         function loadRequest() {
 557                 global $wgUser;
 558                 $this->mAction = $this->mRequest->getVal( 'action' );
 559                 $this->mTarget = $this->mRequest->getVal( 'target' );
 560                 $this->mSearchPrefix = $this->mRequest->getText( 'prefix' );
 561                 $time = $this->mRequest->getVal( 'timestamp' );
 562                 $this->mTimestamp = $time ? wfTimestamp( TS_MW, $time ) : '';
 563                 $this->mFile = $this->mRequest->getVal( 'file' );
 564
 565                 $posted = $this->mRequest->wasPosted() &&
 566                         $wgUser->matchEditToken( $this->mRequest->getVal( 'wpEditToken' ) );
 567                 $this->mRestore = $this->mRequest->getCheck( 'restore' ) && $posted;
 568                 $this->mInvert = $this->mRequest->getCheck( 'invert' ) && $posted;
 569                 $this->mPreview = $this->mRequest->getCheck( 'preview' ) && $posted;
 570                 $this->mDiff = $this->mRequest->getCheck( 'diff' );
 571                 $this->mComment = $this->mRequest->getText( 'wpComment' );
 572                 $this->mUnsuppress = $this->mRequest->getVal( 'wpUnsuppress' ) && $wgUser->isAllowed( 'suppressrevision' );
 573                 $this->mToken = $this->mRequest->getVal( 'token' );
 574
 575                 if ( $wgUser->isAllowed( 'undelete' ) && !$wgUser->isBlocked() ) {
 576                         $this->mAllowed = true; // user can restore
 577                         $this->mCanView = true; // user can view content
 578                 } elseif ( $wgUser->isAllowed( 'deletedtext' ) ) {
 579                         $this->mAllowed = false; // user cannot restore
 580                         $this->mCanView = true; // user can view content
 581                 }  else { // user can only view the list of revisions
 582                         $this->mAllowed = false;
 583                         $this->mCanView = false;
 584                         $this->mTimestamp = '';
 585                         $this->mRestore = false;
 586                 }
 587
 588                 if( $this->mRestore || $this->mInvert ) {
 589                         $timestamps = array();
 590                         $this->mFileVersions = array();
 591                         foreach( $_REQUEST as $key => $val ) {
 592                                 $matches = array();
 593                                 if( preg_match( '/^ts(\d{14})$/', $key, $matches ) ) {
 594                                         array_push( $timestamps, $matches[1] );
 595                                 }
 596
 597                                 if( preg_match( '/^fileid(\d+)$/', $key, $matches ) ) {
 598                                         $this->mFileVersions[] = intval( $matches[1] );
 599                                 }
 600                         }
 601                         rsort( $timestamps );
 602                         $this->mTargetTimestamp = $timestamps;
 603                 }
 604         }
 605
 606         function execute( $par ) {
 607                 global $wgOut, $wgUser;
 608
 609                 $this->setHeaders();
 610                 if ( !$this->userCanExecute( $wgUser ) ) {
 611                         $this->displayRestrictionError();
 612                         return;
 613                 }
 614                 $this->outputHeader();
 615
 616                 $this->loadRequest();
 617
 618                 if ( $this->mAllowed ) {
 619                         $wgOut->setPagetitle( wfMsg( "undeletepage" ) );
 620                 } else {
 621                         $wgOut->setPagetitle( wfMsg( "viewdeletedpage" ) );
 622                 }
 623
 624                 if( $par != '' ) {
 625                         $this->mTarget = $par;
 626                 }
 627                 if ( $this->mTarget !== '' ) {
 628                         $this->mTargetObj = Title::newFromURL( $this->mTarget );
 629                 } else {
 630                         $this->mTargetObj = null;
 631                 }
 632
 633                 if( is_null( $this->mTargetObj ) ) {
 634                 # Not all users can just browse every deleted page from the list
 635                         if( $wgUser->isAllowed( 'browsearchive' ) ) {
 636                                 $this->showSearchForm();
 637
 638                                 # List undeletable articles
 639                                 if( $this->mSearchPrefix ) {
 640                                         $result = PageArchive::listPagesByPrefix( $this->mSearchPrefix );
 641                                         $this->showList( $result );
 642                                 }
 643                         } else {
 644                                 $wgOut->addWikiMsg( 'undelete-header' );
 645                         }
 646                         return;
 647                 }
 648                 if( $this->mTimestamp !== '' ) {
 649                         return $this->showRevision( $this->mTimestamp );
 650                 }
 651                 if( $this->mFile !== null ) {
 652                         $file = new ArchivedFile( $this->mTargetObj, '', $this->mFile );
 653                         // Check if user is allowed to see this file
 654                         if ( !$file->exists() ) {
 655                                 $wgOut->addWikiMsg( 'filedelete-nofile', $this->mFile );
 656                                 return;
 657                         } else if( !$file->userCan( File::DELETED_FILE ) ) {
 658                                 if( $file->isDeleted( File::DELETED_RESTRICTED ) ) {
 659                                         $wgOut->permissionRequired( 'suppressrevision' );
 660                                 } else {
 661                                         $wgOut->permissionRequired( 'deletedtext' );
 662                                 }
 663                                 return false;
 664                         } elseif ( !$wgUser->matchEditToken( $this->mToken, $this->mFile ) ) {
 665                                 $this->showFileConfirmationForm( $this->mFile );
 666                                 return false;
 667                         } else {
 668                                 return $this->showFile( $this->mFile );
 669                         }
 670                 }
 671                 if( $this->mRestore && $this->mAction == "submit" ) {
 672                         global $wgUploadMaintenance;
 673                         if( $wgUploadMaintenance && $this->mTargetObj && $this->mTargetObj->getNamespace() == NS_FILE ) {
 674                                 $wgOut->wrapWikiMsg( "<div class='error'>\n$1\n</div>\n", array( 'filedelete-maintenance' ) );
 675                                 return;
 676                         }
 677                         return $this->undelete();
 678                 }
 679                 if( $this->mInvert && $this->mAction == "submit" ) {
 680                         return $this->showHistory( );
 681                 }
 682                 return $this->showHistory();
 683         }
 684
 685         function showSearchForm() {
 686                 global $wgOut, $wgScript;
 687                 $wgOut->addWikiMsg( 'undelete-header' );
 688
 689                 $wgOut->addHTML(
 690                         Xml::openElement( 'form', array(
 691                                 'method' => 'get',
 692                                 'action' => $wgScript ) ) .
 693                         Xml::fieldset( wfMsg( 'undelete-search-box' ) ) .
 694                         Xml::hidden( 'title',
 695                                 $this->getTitle()->getPrefixedDbKey() ) .
 696                         Xml::inputLabel( wfMsg( 'undelete-search-prefix' ),
 697                                 'prefix', 'prefix', 20,
 698                                 $this->mSearchPrefix ) . ' ' .
 699                         Xml::submitButton( wfMsg( 'undelete-search-submit' ) ) .
 700                         Xml::closeElement( 'fieldset' ) .
 701                         Xml::closeElement( 'form' )
 702                 );
 703         }
 704
 705         // Generic list of deleted pages
 706         private function showList( $result ) {
 707                 global $wgLang, $wgContLang, $wgUser, $wgOut;
 708
 709                 if( $result->numRows() == 0 ) {
 710                         $wgOut->addWikiMsg( 'undelete-no-results' );
 711                         return;
 712                 }
 713
 714                 $wgOut->addWikiMsg( 'undeletepagetext', $wgLang->formatNum( $result->numRows() ) );
 715
 716                 $sk = $wgUser->getSkin();
 717                 $undelete = $this->getTitle();
 718                 $wgOut->addHTML( "<ul>\n" );
 719                 while( $row = $result->fetchObject() ) {
 720                         $title = Title::makeTitleSafe( $row->ar_namespace, $row->ar_title );
 721                         $link = $sk->linkKnown(
 722                                 $undelete,
 723                                 htmlspecialchars( $title->getPrefixedText() ),
 724                                 array(),
 725                                 array( 'target' => $title->getPrefixedText() )
 726                         );
 727                         $revs = wfMsgExt( 'undeleterevisions',
 728                                 array( 'parseinline' ),
 729                                 $wgLang->formatNum( $row->count ) );
 730                         $wgOut->addHTML( "<li>{$link} ({$revs})</li>\n" );
 731                 }
 732                 $result->free();
 733                 $wgOut->addHTML( "</ul>\n" );
 734
 735                 return true;
 736         }
 737
 738         private function showRevision( $timestamp ) {
 739                 global $wgLang, $wgUser, $wgOut;
 740
 741                 $skin = $wgUser->getSkin();
 742
 743                 if(!preg_match("/[0-9]{14}/",$timestamp)) return 0;
 744
 745                 $archive = new PageArchive( $this->mTargetObj );
 746                 $rev = $archive->getRevision( $timestamp );
 747
 748                 if( !$rev ) {
 749                         $wgOut->addWikiMsg( 'undeleterevision-missing' );
 750                         return;
 751                 }
 752
 753                 if( $rev->isDeleted(Revision::DELETED_TEXT) ) {
 754                         if( !$rev->userCan(Revision::DELETED_TEXT) ) {
 755                                 $wgOut->wrapWikiMsg( "<div class='mw-warning plainlinks'>\n$1\n</div>\n", 'rev-deleted-text-permission' );
 756                                 return;
 757                         } else {
 758                                 $wgOut->wrapWikiMsg( "<div class='mw-warning plainlinks'>\n$1\n</div>\n", 'rev-deleted-text-view' );
 759                                 $wgOut->addHTML( '<br />' );
 760                                 // and we are allowed to see...
 761                         }
 762                 }
 763
 764                 $wgOut->setPageTitle( wfMsg( 'undeletepage' ) );
 765
 766                 $link = $skin->linkKnown(
 767                         $this->getTitle( $this->mTargetObj->getPrefixedDBkey() ),
 768                         htmlspecialchars( $this->mTargetObj->getPrefixedText() )
 769                 );
 770
 771                 if( $this->mDiff ) {
 772                         $previousRev = $archive->getPreviousRevision( $timestamp );
 773                         if( $previousRev ) {
 774                                 $this->showDiff( $previousRev, $rev );
 775                                 if( $wgUser->getOption( 'diffonly' ) ) {
 776                                         return;
 777                                 } else {
 778                                         $wgOut->addHTML( '<hr />' );
 779                                 }
 780                         } else {
 781                                 $wgOut->addWikiMsg( 'undelete-nodiff' );
 782                         }
 783                 }
 784
 785                 // date and time are separate parameters to facilitate localisation.
 786                 // $time is kept for backward compat reasons.
 787                 $time = htmlspecialchars( $wgLang->timeAndDate( $timestamp, true ) );
 788                 $d = htmlspecialchars( $wgLang->date( $timestamp, true ) );
 789                 $t = htmlspecialchars( $wgLang->time( $timestamp, true ) );
 790                 $user = $skin->revUserTools( $rev );
 791
 792                 if( $this->mPreview ) {
 793                         $openDiv = '<div id="mw-undelete-revision" class="mw-warning">';
 794                 } else {
 795                         $openDiv = '<div id="mw-undelete-revision">';
 796                 }
 797
 798                 // Revision delete links
 799                 $canHide = $wgUser->isAllowed( 'deleterevision' );
 800                 if( $this->mDiff ) {
 801                         $revdlink = ''; // diffs already have revision delete links
 802                 } else if( $canHide || ($rev->getVisibility() && $wgUser->isAllowed('deletedhistory')) ) {
 803                         if( !$rev->userCan(Revision::DELETED_RESTRICTED ) ) {
 804                                 $revdlink = $skin->revDeleteLinkDisabled( $canHide ); // revision was hidden from sysops
 805                         } else {
 806                                 $query = array(
 807                                         'type'   => 'archive',
 808                                         'target' => $this->mTargetObj->getPrefixedDBkey(),
 809                                         'ids'    => $rev->getTimestamp()
 810                                 );
 811                                 $revdlink = $skin->revDeleteLink( $query,
 812                                         $rev->isDeleted( File::DELETED_RESTRICTED ), $canHide );
 813                         }
 814                 } else {
 815                         $revdlink = '';
 816                 }
 817
 818                 $wgOut->addHTML( $openDiv . $revdlink . wfMsgWikiHtml( 'undelete-revision', $link, $time, $user, $d, $t ) . '</div>' );
 819                 wfRunHooks( 'UndeleteShowRevision', array( $this->mTargetObj, $rev ) );
 820
 821                 if( $this->mPreview ) {
 822                         //Hide [edit]s
 823                         $popts = $wgOut->parserOptions();
 824                         $popts->setEditSection( false );
 825                         $wgOut->parserOptions( $popts );
 826                         $wgOut->addWikiTextTitleTidy( $rev->getText( Revision::FOR_THIS_USER ), $this->mTargetObj, true );
 827                 }
 828
 829                 $wgOut->addHTML(
 830                         Xml::element( 'textarea', array(
 831                                         'readonly' => 'readonly',
 832                                         'cols' => intval( $wgUser->getOption( 'cols' ) ),
 833                                         'rows' => intval( $wgUser->getOption( 'rows' ) ) ),
 834                                 $rev->getText( Revision::FOR_THIS_USER ) . "\n" ) .
 835                         Xml::openElement( 'div' ) .
 836                         Xml::openElement( 'form', array(
 837                                 'method' => 'post',
 838                                 'action' => $this->getTitle()->getLocalURL( array( 'action' => 'submit' ) ) ) ) .
 839                         Xml::element( 'input', array(
 840                                 'type' => 'hidden',
 841                                 'name' => 'target',
 842                                 'value' => $this->mTargetObj->getPrefixedDbKey() ) ) .
 843                         Xml::element( 'input', array(
 844                                 'type' => 'hidden',
 845                                 'name' => 'timestamp',
 846                                 'value' => $timestamp ) ) .
 847                         Xml::element( 'input', array(
 848                                 'type' => 'hidden',
 849                                 'name' => 'wpEditToken',
 850                                 'value' => $wgUser->editToken() ) ) .
 851                         Xml::element( 'input', array(
 852                                 'type' => 'submit',
 853                                 'name' => 'preview',
 854                                 'value' => wfMsg( 'showpreview' ) ) ) .
 855                         Xml::element( 'input', array(
 856                                 'name' => 'diff',
 857                                 'type' => 'submit',
 858                                 'value' => wfMsg( 'showdiff' ) ) ) .
 859                         Xml::closeElement( 'form' ) .
 860                         Xml::closeElement( 'div' ) );
 861         }
 862
 863         /**
 864          * Build a diff display between this and the previous either deleted
 865          * or non-deleted edit.
 866          *
 867          * @param $previousRev Revision
 868          * @param $currentRev Revision
 869          * @return String: HTML
 870          */
 871         function showDiff( $previousRev, $currentRev ) {
 872                 global $wgOut;
 873
 874                 $diffEngine = new DifferenceEngine( $previousRev->getTitle() );
 875                 $diffEngine->showDiffStyle();
 876                 $wgOut->addHTML(
 877                         "<div>" .
 878                         "<table border='0' width='98%' cellpadding='0' cellspacing='4' class='diff'>" .
 879                         "<col class='diff-marker' />" .
 880                         "<col class='diff-content' />" .
 881                         "<col class='diff-marker' />" .
 882                         "<col class='diff-content' />" .
 883                         "<tr>" .
 884                                 "<td colspan='2' width='50%' align='center' class='diff-otitle'>" .
 885                                 $this->diffHeader( $previousRev, 'o' ) .
 886                                 "</td>\n" .
 887                                 "<td colspan='2' width='50%' align='center' class='diff-ntitle'>" .
 888                                 $this->diffHeader( $currentRev, 'n' ) .
 889                                 "</td>\n" .
 890                         "</tr>" .
 891                         $diffEngine->generateDiffBody(
 892                                 $previousRev->getText(), $currentRev->getText() ) .
 893                         "</table>" .
 894                         "</div>\n"
 895                 );
 896         }
 897
 898         private function diffHeader( $rev, $prefix ) {
 899                 global $wgUser, $wgLang;
 900                 $sk = $wgUser->getSkin();
 901                 $isDeleted = !( $rev->getId() && $rev->getTitle() );
 902                 if( $isDeleted ) {
 903                         /// @todo Fixme: $rev->getTitle() is null for deleted revs...?
 904                         $targetPage = $this->getTitle();
 905                         $targetQuery = array(
 906                                 'target' => $this->mTargetObj->getPrefixedText(),
 907                                 'timestamp' => wfTimestamp( TS_MW, $rev->getTimestamp() )
 908                         );
 909                 } else {
 910                         /// @todo Fixme getId() may return non-zero for deleted revs...
 911                         $targetPage = $rev->getTitle();
 912                         $targetQuery = array( 'oldid' => $rev->getId() );
 913                 }
 914                 // Add show/hide deletion links if available
 915                 $canHide = $wgUser->isAllowed( 'deleterevision' );
 916                 if( $canHide || ($rev->getVisibility() && $wgUser->isAllowed('deletedhistory')) ) {
 917                         $del = ' ';
 918                         if( !$rev->userCan( Revision::DELETED_RESTRICTED ) ) {
 919                                 $del .= $sk->revDeleteLinkDisabled( $canHide ); // revision was hidden from sysops
 920                         } else {
 921                                 $query = array(
 922                                         'type'   => 'archive',
 923                                         'target' => $this->mTargetObj->getPrefixedDbkey(),
 924                                         'ids'    => $rev->getTimestamp()
 925                                 );
 926                                 $del .= $sk->revDeleteLink( $query,
 927                                         $rev->isDeleted( Revision::DELETED_RESTRICTED ), $canHide );
 928                         }
 929                 } else {
 930                         $del = '';
 931                 }
 932                 return
 933                         '<div id="mw-diff-'.$prefix.'title1"><strong>' .
 934                                 $sk->link(
 935                                         $targetPage,
 936                                         wfMsgHtml(
 937                                                 'revisionasof',
 938                                                 htmlspecialchars( $wgLang->timeanddate( $rev->getTimestamp(), true ) ),
 939                                                 htmlspecialchars( $wgLang->date( $rev->getTimestamp(), true ) ),
 940                                                 htmlspecialchars( $wgLang->time( $rev->getTimestamp(), true ) )
 941                                         ),
 942                                         array(),
 943                                         $targetQuery
 944                                 ) .
 945                         '</strong></div>' .
 946                         '<div id="mw-diff-'.$prefix.'title2">' .
 947                                 $sk->revUserTools( $rev ) . '<br />' .
 948                         '</div>' .
 949                         '<div id="mw-diff-'.$prefix.'title3">' .
 950                                 $sk->revComment( $rev ) . $del . '<br />' .
 951                         '</div>';
 952         }
 953
 954         /**
 955          * Show a form confirming whether a tokenless user really wants to see a file
 956          */
 957         private function showFileConfirmationForm( $key ) {
 958                 global $wgOut, $wgUser, $wgLang;
 959                 $file = new ArchivedFile( $this->mTargetObj, '', $this->mFile );
 960                 $wgOut->addWikiMsg( 'undelete-show-file-confirm',
 961                         $this->mTargetObj->getText(),
 962                         $wgLang->date( $file->getTimestamp() ),
 963                         $wgLang->time( $file->getTimestamp() ) );
 964                 $wgOut->addHTML(
 965                         Xml::openElement( 'form', array(
 966                                 'method' => 'POST',
 967                                 'action' => $this->getTitle()->getLocalUrl(
 968                                         'target=' . urlencode( $this->mTarget ) .
 969                                         '&file=' . urlencode( $key ) .
 970                                         '&token=' . urlencode( $wgUser->editToken( $key ) ) )
 971                                 )
 972                         ) .
 973                         Xml::submitButton( wfMsg( 'undelete-show-file-submit' ) ) .
 974                         '</form>'
 975                 );
 976         }
 977
 978         /**
 979          * Show a deleted file version requested by the visitor.
 980          */
 981         private function showFile( $key ) {
 982                 global $wgOut, $wgRequest;
 983                 $wgOut->disable();
 984
 985                 # We mustn't allow the output to be Squid cached, otherwise
 986                 # if an admin previews a deleted image, and it's cached, then
 987                 # a user without appropriate permissions can toddle off and
 988                 # nab the image, and Squid will serve it
 989                 $wgRequest->response()->header( 'Expires: ' . gmdate( 'D, d M Y H:i:s', 0 ) . ' GMT' );
 990                 $wgRequest->response()->header( 'Cache-Control: no-cache, no-store, max-age=0, must-revalidate' );
 991                 $wgRequest->response()->header( 'Pragma: no-cache' );
 992
 993                 global $IP;
 994                 require_once( "$IP/includes/StreamFile.php" );
 995                 $repo = RepoGroup::singleton()->getLocalRepo();
 996                 $path = $repo->getZonePath( 'deleted' ) . '/' . $repo->getDeletedHashPath( $key ) . $key;
 997                 wfStreamFile( $path );
 998         }
 999
1000         private function showHistory( ) {
1001                 global $wgLang, $wgUser, $wgOut;
1002
1003                 $sk = $wgUser->getSkin();
1004                 if( $this->mAllowed ) {
1005                         $wgOut->setPagetitle( wfMsg( "undeletepage" ) );
1006                 } else {
1007                         $wgOut->setPagetitle( wfMsg( 'viewdeletedpage' ) );
1008                 }
1009
1010                 $wgOut->wrapWikiMsg(  "<div class='mw-undelete-pagetitle'>\n$1\n</div>\n", array ( 'undeletepagetitle', $this->mTargetObj->getPrefixedText() ) );
1011
1012                 $archive = new PageArchive( $this->mTargetObj );
1013                 /*
1014                 $text = $archive->getLastRevisionText();
1015                 if( is_null( $text ) ) {
1016                         $wgOut->addWikiMsg( "nohistory" );
1017                         return;
1018                 }
1019                 */
1020                 $wgOut->addHTML( '<div class="mw-undelete-history">' );
1021                 if ( $this->mAllowed ) {
1022                         $wgOut->addWikiMsg( "undeletehistory" );
1023                         $wgOut->addWikiMsg( "undeleterevdel" );
1024                 } else {
1025                         $wgOut->addWikiMsg( "undeletehistorynoadmin" );
1026                 }
1027                 $wgOut->addHTML( '</div>' );
1028
1029                 # List all stored revisions
1030                 $revisions = $archive->listRevisions();
1031                 $files = $archive->listFiles();
1032
1033                 $haveRevisions = $revisions && $revisions->numRows() > 0;
1034                 $haveFiles = $files && $files->numRows() > 0;
1035
1036                 # Batch existence check on user and talk pages
1037                 if( $haveRevisions ) {
1038                         $batch = new LinkBatch();
1039                         while( $row = $revisions->fetchObject() ) {
1040                                 $batch->addObj( Title::makeTitleSafe( NS_USER, $row->ar_user_text ) );
1041                                 $batch->addObj( Title::makeTitleSafe( NS_USER_TALK, $row->ar_user_text ) );
1042                         }
1043                         $batch->execute();
1044                         $revisions->seek( 0 );
1045                 }
1046                 if( $haveFiles ) {
1047                         $batch = new LinkBatch();
1048                         while( $row = $files->fetchObject() ) {
1049                                 $batch->addObj( Title::makeTitleSafe( NS_USER, $row->fa_user_text ) );
1050                                 $batch->addObj( Title::makeTitleSafe( NS_USER_TALK, $row->fa_user_text ) );
1051                         }
1052                         $batch->execute();
1053                         $files->seek( 0 );
1054                 }
1055
1056                 if ( $this->mAllowed ) {
1057                         $action = $this->getTitle()->getLocalURL( array( 'action' => 'submit' ) );
1058                         # Start the form here
1059                         $top = Xml::openElement( 'form', array( 'method' => 'post', 'action' => $action, 'id' => 'undelete' ) );
1060                         $wgOut->addHTML( $top );
1061                 }
1062
1063                 # Show relevant lines from the deletion log:
1064                 $wgOut->addHTML( Xml::element( 'h2', null, LogPage::logName( 'delete' ) ) . "\n" );
1065                 LogEventsList::showLogExtract( $wgOut, 'delete', $this->mTargetObj->getPrefixedText() );
1066                 # Show relevant lines from the suppression log:
1067                 if( $wgUser->isAllowed( 'suppressionlog' ) ) {
1068                         $wgOut->addHTML( Xml::element( 'h2', null, LogPage::logName( 'suppress' ) ) . "\n" );
1069                         LogEventsList::showLogExtract( $wgOut, 'suppress', $this->mTargetObj->getPrefixedText() );
1070                 }
1071
1072                 if( $this->mAllowed && ( $haveRevisions || $haveFiles ) ) {
1073                         # Format the user-visible controls (comment field, submission button)
1074                         # in a nice little table
1075                         if( $wgUser->isAllowed( 'suppressrevision' ) ) {
1076                                 $unsuppressBox =
1077                                         "<tr>
1078                                                 <td>&#160;</td>
1079                                                 <td class='mw-input'>" .
1080                                                         Xml::checkLabel( wfMsg('revdelete-unsuppress'), 'wpUnsuppress',
1081                                                                 'mw-undelete-unsuppress', $this->mUnsuppress ).
1082                                                 "</td>
1083                                         </tr>";
1084                         } else {
1085                                 $unsuppressBox = "";
1086                         }
1087                         $table =
1088                                 Xml::fieldset( wfMsg( 'undelete-fieldset-title' ) ) .
1089                                 Xml::openElement( 'table', array( 'id' => 'mw-undelete-table' ) ) .
1090                                         "<tr>
1091                                                 <td colspan='2' class='mw-undelete-extrahelp'>" .
1092                                                         wfMsgWikiHtml( 'undeleteextrahelp' ) .
1093                                                 "</td>
1094                                         </tr>
1095                                         <tr>
1096                                                 <td class='mw-label'>" .
1097                                                         Xml::label( wfMsg( 'undeletecomment' ), 'wpComment' ) .
1098                                                 "</td>
1099                                                 <td class='mw-input'>" .
1100                                                         Xml::input( 'wpComment', 50, $this->mComment, array( 'id' =>  'wpComment' ) ) .
1101                                                 "</td>
1102                                         </tr>
1103                                         <tr>
1104                                                 <td>&#160;</td>
1105                                                 <td class='mw-submit'>" .
1106                                                         Xml::submitButton( wfMsg( 'undeletebtn' ), array( 'name' => 'restore', 'id' => 'mw-undelete-submit' ) ) . ' ' .
1107                                                         Xml::element( 'input', array( 'type' => 'reset', 'value' => wfMsg( 'undeletereset' ), 'id' => 'mw-undelete-reset' ) ) . ' ' .
1108                                                         Xml::submitButton( wfMsg( 'undeleteinvert' ), array( 'name' => 'invert', 'id' => 'mw-undelete-invert' ) ) .
1109                                                 "</td>
1110                                         </tr>" .
1111                                         $unsuppressBox .
1112                                 Xml::closeElement( 'table' ) .
1113                                 Xml::closeElement( 'fieldset' );
1114
1115                         $wgOut->addHTML( $table );
1116                 }
1117
1118                 $wgOut->addHTML( Xml::element( 'h2', null, wfMsg( 'history' ) ) . "\n" );
1119
1120                 if( $haveRevisions ) {
1121                         # The page's stored (deleted) history:
1122                         $wgOut->addHTML("<ul>");
1123                         $target = urlencode( $this->mTarget );
1124                         $remaining = $revisions->numRows();
1125                         $earliestLiveTime = $this->mTargetObj->getEarliestRevTime();
1126
1127                         while( $row = $revisions->fetchObject() ) {
1128                                 $remaining--;
1129                                 $wgOut->addHTML( $this->formatRevisionRow( $row, $earliestLiveTime, $remaining, $sk ) );
1130                         }
1131                         $revisions->free();
1132                         $wgOut->addHTML("</ul>");
1133                 } else {
1134                         $wgOut->addWikiMsg( "nohistory" );
1135                 }
1136
1137                 if( $haveFiles ) {
1138                         $wgOut->addHTML( Xml::element( 'h2', null, wfMsg( 'filehist' ) ) . "\n" );
1139                         $wgOut->addHTML( "<ul>" );
1140                         while( $row = $files->fetchObject() ) {
1141                                 $wgOut->addHTML( $this->formatFileRow( $row, $sk ) );
1142                         }
1143                         $files->free();
1144                         $wgOut->addHTML( "</ul>" );
1145                 }
1146
1147                 if ( $this->mAllowed ) {
1148                         # Slip in the hidden controls here
1149                         $misc  = Xml::hidden( 'target', $this->mTarget );
1150                         $misc .= Xml::hidden( 'wpEditToken', $wgUser->editToken() );
1151                         $misc .= Xml::closeElement( 'form' );
1152                         $wgOut->addHTML( $misc );
1153                 }
1154
1155                 return true;
1156         }
1157
1158         private function formatRevisionRow( $row, $earliestLiveTime, $remaining, $sk ) {
1159                 global $wgUser, $wgLang;
1160
1161                 $rev = Revision::newFromArchiveRow( $row,
1162                         array( 'page' => $this->mTargetObj->getArticleId() ) );
1163                 $stxt = '';
1164                 $ts = wfTimestamp( TS_MW, $row->ar_timestamp );
1165                 // Build checkboxen...
1166                 if( $this->mAllowed ) {
1167                         if( $this->mInvert ) {
1168                                 if( in_array( $ts, $this->mTargetTimestamp ) ) {
1169                                         $checkBox = Xml::check( "ts$ts");
1170                                 } else {
1171                                         $checkBox = Xml::check( "ts$ts", true );
1172                                 }
1173                         } else {
1174                                 $checkBox = Xml::check( "ts$ts" );
1175                         }
1176                 } else {
1177                         $checkBox = '';
1178                 }
1179                 // Build page & diff links...
1180                 if( $this->mCanView ) {
1181                         $titleObj = $this->getTitle();
1182                         # Last link
1183                         if( !$rev->userCan( Revision::DELETED_TEXT ) ) {
1184                                 $pageLink = htmlspecialchars( $wgLang->timeanddate( $ts, true ) );
1185                                 $last = wfMsgHtml('diff');
1186                         } else if( $remaining > 0 || ($earliestLiveTime && $ts > $earliestLiveTime) ) {
1187                                 $pageLink = $this->getPageLink( $rev, $titleObj, $ts, $sk );
1188                                 $last = $sk->linkKnown(
1189                                         $titleObj,
1190                                         wfMsgHtml('diff'),
1191                                         array(),
1192                                         array(
1193                                                 'target' => $this->mTargetObj->getPrefixedText(),
1194                                                 'timestamp' => $ts,
1195                                                 'diff' => 'prev'
1196                                         )
1197                                 );
1198                         } else {
1199                                 $pageLink = $this->getPageLink( $rev, $titleObj, $ts, $sk );
1200                                 $last = wfMsgHtml('diff');
1201                         }
1202                 } else {
1203                         $pageLink = htmlspecialchars( $wgLang->timeanddate( $ts, true ) );
1204                         $last = wfMsgHtml('diff');
1205                 }
1206                 // User links
1207                 $userLink = $sk->revUserTools( $rev );
1208                 // Revision text size
1209                 if( !is_null($size = $row->ar_len) ) {
1210                         $stxt = $sk->formatRevisionSize( $size );
1211                 }
1212                 // Edit summary
1213                 $comment = $sk->revComment( $rev );
1214                 // Revision delete links
1215                 $canHide = $wgUser->isAllowed( 'deleterevision' );
1216                 if( $canHide || ($rev->getVisibility() && $wgUser->isAllowed('deletedhistory')) ) {
1217                         if( !$rev->userCan( Revision::DELETED_RESTRICTED ) ) {
1218                                 $revdlink = $sk->revDeleteLinkDisabled( $canHide ); // revision was hidden from sysops
1219                         } else {
1220                                 $query = array(
1221                                         'type'   => 'archive',
1222                                         'target' => $this->mTargetObj->getPrefixedDBkey(),
1223                                         'ids'    => $ts
1224                                 );
1225                                 $revdlink = $sk->revDeleteLink( $query,
1226                                         $rev->isDeleted( Revision::DELETED_RESTRICTED ), $canHide );
1227                         }
1228                 } else {
1229                         $revdlink = '';
1230                 }
1231                 return "<li>$checkBox $revdlink ($last) $pageLink . . $userLink $stxt $comment</li>";
1232         }
1233
1234         private function formatFileRow( $row, $sk ) {
1235                 global $wgUser, $wgLang;
1236
1237                 $file = ArchivedFile::newFromRow( $row );
1238
1239                 $ts = wfTimestamp( TS_MW, $row->fa_timestamp );
1240                 if( $this->mAllowed && $row->fa_storage_key ) {
1241                         $checkBox = Xml::check( "fileid" . $row->fa_id );
1242                         $key = urlencode( $row->fa_storage_key );
1243                         $target = urlencode( $this->mTarget );
1244                         $pageLink = $this->getFileLink( $file, $this->getTitle(), $ts, $key, $sk );
1245                 } else {
1246                         $checkBox = '';
1247                         $pageLink = $wgLang->timeanddate( $ts, true );
1248                 }
1249                 $userLink = $this->getFileUser( $file, $sk );
1250                 $data =
1251                         wfMsg( 'widthheight',
1252                                 $wgLang->formatNum( $row->fa_width ),
1253                                 $wgLang->formatNum( $row->fa_height ) ) .
1254                         ' (' .
1255                         wfMsg( 'nbytes', $wgLang->formatNum( $row->fa_size ) ) .
1256                         ')';
1257                 $data = htmlspecialchars( $data );
1258                 $comment = $this->getFileComment( $file, $sk );
1259                 // Add show/hide deletion links if available
1260                 $canHide = $wgUser->isAllowed( 'deleterevision' );
1261                 if( $canHide || ($file->getVisibility() && $wgUser->isAllowed('deletedhistory')) ) {
1262                         if( !$file->userCan(File::DELETED_RESTRICTED ) ) {
1263                                 $revdlink = $sk->revDeleteLinkDisabled( $canHide ); // revision was hidden from sysops
1264                         } else {
1265                                 $query = array(
1266                                         'type' => 'filearchive',
1267                                         'target' => $this->mTargetObj->getPrefixedDBkey(),
1268                                         'ids' => $row->fa_id
1269                                 );
1270                                 $revdlink = $sk->revDeleteLink( $query,
1271                                         $file->isDeleted( File::DELETED_RESTRICTED ), $canHide );
1272                         }
1273                 } else {
1274                         $revdlink = '';
1275                 }
1276                 return "<li>$checkBox $revdlink $pageLink . . $userLink $data $comment</li>\n";
1277         }
1278
1279         /**
1280          * Fetch revision text link if it's available to all users
1281          * @return string
1282          */
1283         function getPageLink( $rev, $titleObj, $ts, $sk ) {
1284                 global $wgLang;
1285
1286                 $time = htmlspecialchars( $wgLang->timeanddate( $ts, true ) );
1287
1288                 if( !$rev->userCan(Revision::DELETED_TEXT) ) {
1289                         return '<span class="history-deleted">' . $time . '</span>';
1290                 } else {
1291                         $link = $sk->linkKnown(
1292                                 $titleObj,
1293                                 $time,
1294                                 array(),
1295                                 array(
1296                                         'target' => $this->mTargetObj->getPrefixedText(),
1297                                         'timestamp' => $ts
1298                                 )
1299                         );
1300                         if( $rev->isDeleted(Revision::DELETED_TEXT) )
1301                                 $link = '<span class="history-deleted">' . $link . '</span>';
1302                         return $link;
1303                 }
1304         }
1305
1306         /**
1307          * Fetch image view link if it's available to all users
1308          *
1309          * @return String: HTML fragment
1310          */
1311         function getFileLink( $file, $titleObj, $ts, $key, $sk ) {
1312                 global $wgLang, $wgUser;
1313
1314                 if( !$file->userCan(File::DELETED_FILE) ) {
1315                         return '<span class="history-deleted">' . $wgLang->timeanddate( $ts, true ) . '</span>';
1316                 } else {
1317                         $link = $sk->linkKnown(
1318                                 $titleObj,
1319                                 $wgLang->timeanddate( $ts, true ),
1320                                 array(),
1321                                 array(
1322                                         'target' => $this->mTargetObj->getPrefixedText(),
1323                                         'file' => $key,
1324                                         'token' => $wgUser->editToken( $key )
1325                                 )
1326                         );
1327                         if( $file->isDeleted(File::DELETED_FILE) )
1328                                 $link = '<span class="history-deleted">' . $link . '</span>';
1329                         return $link;
1330                 }
1331         }
1332
1333         /**
1334          * Fetch file's user id if it's available to this user
1335          *
1336          * @return String: HTML fragment
1337          */
1338         function getFileUser( $file, $sk ) {
1339                 if( !$file->userCan(File::DELETED_USER) ) {
1340                         return '<span class="history-deleted">' . wfMsgHtml( 'rev-deleted-user' ) . '</span>';
1341                 } else {
1342                         $link = $sk->userLink( $file->getRawUser(), $file->getRawUserText() ) .
1343                                 $sk->userToolLinks( $file->getRawUser(), $file->getRawUserText() );
1344                         if( $file->isDeleted(File::DELETED_USER) )
1345                                 $link = '<span class="history-deleted">' . $link . '</span>';
1346                         return $link;
1347                 }
1348         }
1349
1350         /**
1351          * Fetch file upload comment if it's available to this user
1352          *
1353          * @return String: HTML fragment
1354          */
1355         function getFileComment( $file, $sk ) {
1356                 if( !$file->userCan(File::DELETED_COMMENT) ) {
1357                         return '<span class="history-deleted"><span class="comment">' . wfMsgHtml( 'rev-deleted-comment' ) . '</span></span>';
1358                 } else {
1359                         $link = $sk->commentBlock( $file->getRawDescription() );
1360                         if( $file->isDeleted(File::DELETED_COMMENT) )
1361                                 $link = '<span class="history-deleted">' . $link . '</span>';
1362                         return $link;
1363                 }
1364         }
1365
1366         function undelete() {
1367                 global $wgOut, $wgUser;
1368                 if ( wfReadOnly() ) {
1369                         $wgOut->readOnlyPage();
1370                         return;
1371                 }
1372                 if( !is_null( $this->mTargetObj ) ) {
1373                         $archive = new PageArchive( $this->mTargetObj );
1374                         $ok = $archive->undelete(
1375                                 $this->mTargetTimestamp,
1376                                 $this->mComment,
1377                                 $this->mFileVersions,
1378                                 $this->mUnsuppress );
1379
1380                         if( is_array($ok) ) {
1381                                 if ( $ok[1] ) // Undeleted file count
1382                                         wfRunHooks( 'FileUndeleteComplete', array(
1383                                                 $this->mTargetObj, $this->mFileVersions,
1384                                                 $wgUser, $this->mComment) );
1385
1386                                 $skin = $wgUser->getSkin();
1387                                 $link = $skin->linkKnown( $this->mTargetObj );
1388                                 $wgOut->addHTML( wfMsgWikiHtml( 'undeletedpage', $link ) );
1389                         } else {
1390                                 $wgOut->showFatalError( wfMsg( "cannotundelete" ) );
1391                                 $wgOut->addHTML( '<p>' . wfMsgHtml( "undeleterevdel" ) . '</p>' );
1392                         }
1393
1394                         // Show file deletion warnings and errors
1395                         $status = $archive->getFileStatus();
1396                         if( $status && !$status->isGood() ) {
1397                                 $wgOut->addWikiText( $status->getWikiText( 'undelete-error-short', 'undelete-error-long' ) );
1398                         }
1399                 } else {
1400                         $wgOut->showFatalError( wfMsg( "cannotundelete" ) );
1401                 }
1402                 return false;
1403         }
1404 }