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