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