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 .= wfMsgForContent( 'colon-separator' ) . $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, '', $this->mFile );
 641                         // Check if user is allowed to see this file
 642                         if ( !$file->exists() ) {
 643                                 $wgOut->addWikiMsg( 'filedelete-nofile', $this->mFile );
 644                                 return;
 645                         } else if( !$file->userCan( File::DELETED_FILE ) ) {
 646                                 if( $file->isDeleted( File::DELETED_RESTRICTED ) ) {
 647                                         $wgOut->permissionRequired( 'suppressrevision' );
 648                                 } else {
 649                                         $wgOut->permissionRequired( 'deletedtext' );
 650                                 }
 651                                 return false;
 652                         } elseif ( !$wgUser->matchEditToken( $this->mToken, $this->mFile ) ) {
 653                                 $this->showFileConfirmationForm( $this->mFile );
 654                                 return false;
 655                         } else {
 656                                 return $this->showFile( $this->mFile );
 657                         }
 658                 }
 659                 if( $this->mRestore && $this->mAction == "submit" ) {
 660                         global $wgUploadMaintenance;
 661                         if( $wgUploadMaintenance && $this->mTargetObj && $this->mTargetObj->getNamespace() == NS_FILE ) {
 662                                 $wgOut->wrapWikiMsg( "<div class='error'>\n$1</div>\n", array( 'filedelete-maintenance' ) );
 663                                 return;
 664                         }
 665                         return $this->undelete();
 666                 }
 667                 if( $this->mInvert && $this->mAction == "submit" ) {
 668                         return $this->showHistory( );
 669                 }
 670                 return $this->showHistory();
 671         }
 672
 673         function showSearchForm() {
 674                 global $wgOut, $wgScript;
 675                 $wgOut->addWikiMsg( 'undelete-header' );
 676
 677                 $wgOut->addHTML(
 678                         Xml::openElement( 'form', array(
 679                                 'method' => 'get',
 680                                 'action' => $wgScript ) ) .
 681                         Xml::fieldset( wfMsg( 'undelete-search-box' ) ) .
 682                         Xml::hidden( 'title',
 683                                 SpecialPage::getTitleFor( 'Undelete' )->getPrefixedDbKey() ) .
 684                         Xml::inputLabel( wfMsg( 'undelete-search-prefix' ),
 685                                 'prefix', 'prefix', 20,
 686                                 $this->mSearchPrefix ) . ' ' .
 687                         Xml::submitButton( wfMsg( 'undelete-search-submit' ) ) .
 688                         Xml::closeElement( 'fieldset' ) .
 689                         Xml::closeElement( 'form' )
 690                 );
 691         }
 692
 693         // Generic list of deleted pages
 694         private function showList( $result ) {
 695                 global $wgLang, $wgContLang, $wgUser, $wgOut;
 696
 697                 if( $result->numRows() == 0 ) {
 698                         $wgOut->addWikiMsg( 'undelete-no-results' );
 699                         return;
 700                 }
 701
 702                 $wgOut->addWikiMsg( 'undeletepagetext', $wgLang->formatNum( $result->numRows() ) );
 703
 704                 $sk = $wgUser->getSkin();
 705                 $undelete = SpecialPage::getTitleFor( 'Undelete' );
 706                 $wgOut->addHTML( "<ul>\n" );
 707                 while( $row = $result->fetchObject() ) {
 708                         $title = Title::makeTitleSafe( $row->ar_namespace, $row->ar_title );
 709                         $link = $sk->linkKnown(
 710                                 $undelete,
 711                                 htmlspecialchars( $title->getPrefixedText() ),
 712                                 array(),
 713                                 array( 'target' => $title->getPrefixedText() )
 714                         );
 715                         $revs = wfMsgExt( 'undeleterevisions',
 716                                 array( 'parseinline' ),
 717                                 $wgLang->formatNum( $row->count ) );
 718                         $wgOut->addHTML( "<li>{$link} ({$revs})</li>\n" );
 719                 }
 720                 $result->free();
 721                 $wgOut->addHTML( "</ul>\n" );
 722
 723                 return true;
 724         }
 725
 726         private function showRevision( $timestamp ) {
 727                 global $wgLang, $wgUser, $wgOut;
 728                 $self = SpecialPage::getTitleFor( 'Undelete' );
 729                 $skin = $wgUser->getSkin();
 730
 731                 if(!preg_match("/[0-9]{14}/",$timestamp)) return 0;
 732
 733                 $archive = new PageArchive( $this->mTargetObj );
 734                 $rev = $archive->getRevision( $timestamp );
 735
 736                 if( !$rev ) {
 737                         $wgOut->addWikiMsg( 'undeleterevision-missing' );
 738                         return;
 739                 }
 740
 741                 if( $rev->isDeleted(Revision::DELETED_TEXT) ) {
 742                         if( !$rev->userCan(Revision::DELETED_TEXT) ) {
 743                                 $wgOut->wrapWikiMsg( "<div class='mw-warning plainlinks'>\n$1</div>\n", 'rev-deleted-text-permission' );
 744                                 return;
 745                         } else {
 746                                 $wgOut->wrapWikiMsg( "<div class='mw-warning plainlinks'>\n$1</div>\n", 'rev-deleted-text-view' );
 747                                 $wgOut->addHTML( '<br />' );
 748                                 // and we are allowed to see...
 749                         }
 750                 }
 751
 752                 $wgOut->setPageTitle( wfMsg( 'undeletepage' ) );
 753
 754                 $link = $skin->linkKnown(
 755                         SpecialPage::getTitleFor( 'Undelete', $this->mTargetObj->getPrefixedDBkey() ),
 756                         htmlspecialchars( $this->mTargetObj->getPrefixedText() )
 757                 );
 758
 759                 if( $this->mDiff ) {
 760                         $previousRev = $archive->getPreviousRevision( $timestamp );
 761                         if( $previousRev ) {
 762                                 $this->showDiff( $previousRev, $rev );
 763                                 if( $wgUser->getOption( 'diffonly' ) ) {
 764                                         return;
 765                                 } else {
 766                                         $wgOut->addHTML( '<hr />' );
 767                                 }
 768                         } else {
 769                                 $wgOut->addWikiMsg( 'undelete-nodiff' );
 770                         }
 771                 }
 772
 773                 // date and time are separate parameters to facilitate localisation.
 774                 // $time is kept for backward compat reasons.
 775                 $time = htmlspecialchars( $wgLang->timeAndDate( $timestamp, true ) );
 776                 $d = htmlspecialchars( $wgLang->date( $timestamp, true ) );
 777                 $t = htmlspecialchars( $wgLang->time( $timestamp, true ) );
 778                 $user = $skin->revUserTools( $rev );
 779
 780                 if( $this->mPreview ) {
 781                         $openDiv = '<div id="mw-undelete-revision" class="mw-warning">';
 782                 } else {
 783                         $openDiv = '<div id="mw-undelete-revision">';
 784                 }
 785
 786                 // Revision delete links
 787                 $canHide = $wgUser->isAllowed( 'deleterevision' );
 788                 if( $this->mDiff ) {
 789                         $revdlink = ''; // diffs already have revision delete links
 790                 } else if( $canHide || ($rev->getVisibility() && $wgUser->isAllowed('deletedhistory')) ) {
 791                         if( !$rev->userCan(Revision::DELETED_RESTRICTED ) ) {
 792                                 $revdlink = $skin->revDeleteLinkDisabled( $canHide ); // revision was hidden from sysops
 793                         } else {
 794                                 $query = array(
 795                                         'type'   => 'archive',
 796                                         'target' => $this->mTargetObj->getPrefixedDBkey(),
 797                                         'ids'    => $rev->getTimestamp()
 798                                 );
 799                                 $revdlink = $skin->revDeleteLink( $query,
 800                                         $rev->isDeleted( File::DELETED_RESTRICTED ), $canHide );
 801                         }
 802                 } else {
 803                         $revdlink = '';
 804                 }
 805
 806                 $wgOut->addHTML( $openDiv . $revdlink . wfMsgWikiHtml( 'undelete-revision', $link, $time, $user, $d, $t ) . '</div>' );
 807                 wfRunHooks( 'UndeleteShowRevision', array( $this->mTargetObj, $rev ) );
 808
 809                 if( $this->mPreview ) {
 810                         //Hide [edit]s
 811                         $popts = $wgOut->parserOptions();
 812                         $popts->setEditSection( false );
 813                         $wgOut->parserOptions( $popts );
 814                         $wgOut->addWikiTextTitleTidy( $rev->getText( Revision::FOR_THIS_USER ), $this->mTargetObj, true );
 815                 }
 816
 817                 $wgOut->addHTML(
 818                         Xml::element( 'textarea', array(
 819                                         'readonly' => 'readonly',
 820                                         'cols' => intval( $wgUser->getOption( 'cols' ) ),
 821                                         'rows' => intval( $wgUser->getOption( 'rows' ) ) ),
 822                                 $rev->getText( Revision::FOR_THIS_USER ) . "\n" ) .
 823                         Xml::openElement( 'div' ) .
 824                         Xml::openElement( 'form', array(
 825                                 'method' => 'post',
 826                                 'action' => $self->getLocalURL( array( 'action' => 'submit' ) ) ) ) .
 827                         Xml::element( 'input', array(
 828                                 'type' => 'hidden',
 829                                 'name' => 'target',
 830                                 'value' => $this->mTargetObj->getPrefixedDbKey() ) ) .
 831                         Xml::element( 'input', array(
 832                                 'type' => 'hidden',
 833                                 'name' => 'timestamp',
 834                                 'value' => $timestamp ) ) .
 835                         Xml::element( 'input', array(
 836                                 'type' => 'hidden',
 837                                 'name' => 'wpEditToken',
 838                                 'value' => $wgUser->editToken() ) ) .
 839                         Xml::element( 'input', array(
 840                                 'type' => 'submit',
 841                                 'name' => 'preview',
 842                                 'value' => wfMsg( 'showpreview' ) ) ) .
 843                         Xml::element( 'input', array(
 844                                 'name' => 'diff',
 845                                 'type' => 'submit',
 846                                 'value' => wfMsg( 'showdiff' ) ) ) .
 847                         Xml::closeElement( 'form' ) .
 848                         Xml::closeElement( 'div' ) );
 849         }
 850
 851         /**
 852          * Build a diff display between this and the previous either deleted
 853          * or non-deleted edit.
 854          * @param Revision $previousRev
 855          * @param Revision $currentRev
 856          * @return string HTML
 857          */
 858         function showDiff( $previousRev, $currentRev ) {
 859                 global $wgOut;
 860
 861                 $diffEngine = new DifferenceEngine();
 862                 $diffEngine->showDiffStyle();
 863                 $wgOut->addHTML(
 864                         "<div>" .
 865                         "<table border='0' width='98%' cellpadding='0' cellspacing='4' class='diff'>" .
 866                         "<col class='diff-marker' />" .
 867                         "<col class='diff-content' />" .
 868                         "<col class='diff-marker' />" .
 869                         "<col class='diff-content' />" .
 870                         "<tr>" .
 871                                 "<td colspan='2' width='50%' align='center' class='diff-otitle'>" .
 872                                 $this->diffHeader( $previousRev, 'o' ) .
 873                                 "</td>\n" .
 874                                 "<td colspan='2' width='50%' align='center' class='diff-ntitle'>" .
 875                                 $this->diffHeader( $currentRev, 'n' ) .
 876                                 "</td>\n" .
 877                         "</tr>" .
 878                         $diffEngine->generateDiffBody(
 879                                 $previousRev->getText(), $currentRev->getText() ) .
 880                         "</table>" .
 881                         "</div>\n"
 882                 );
 883         }
 884
 885         private function diffHeader( $rev, $prefix ) {
 886                 global $wgUser, $wgLang;
 887                 $sk = $wgUser->getSkin();
 888                 $isDeleted = !( $rev->getId() && $rev->getTitle() );
 889                 if( $isDeleted ) {
 890                         /// @todo Fixme: $rev->getTitle() is null for deleted revs...?
 891                         $targetPage = SpecialPage::getTitleFor( 'Undelete' );
 892                         $targetQuery = array(
 893                                 'target' => $this->mTargetObj->getPrefixedText(),
 894                                 'timestamp' => wfTimestamp( TS_MW, $rev->getTimestamp() )
 895                         );
 896                 } else {
 897                         /// @todo Fixme getId() may return non-zero for deleted revs...
 898                         $targetPage = $rev->getTitle();
 899                         $targetQuery = array( 'oldid' => $rev->getId() );
 900                 }
 901                 // Add show/hide deletion links if available
 902                 $canHide = $wgUser->isAllowed( 'deleterevision' );
 903                 if( $canHide || ($rev->getVisibility() && $wgUser->isAllowed('deletedhistory')) ) {
 904                         $del = ' ';
 905                         if( !$rev->userCan( Revision::DELETED_RESTRICTED ) ) {
 906                                 $del .= $sk->revDeleteLinkDisabled( $canHide ); // revision was hidden from sysops
 907                         } else {
 908                                 $query = array(
 909                                         'type'   => 'archive',
 910                                         'target' => $this->mTargetObj->getPrefixedDbkey(),
 911                                         'ids'    => $rev->getTimestamp()
 912                                 );
 913                                 $del .= $sk->revDeleteLink( $query,
 914                                         $rev->isDeleted( Revision::DELETED_RESTRICTED ), $canHide );
 915                         }
 916                 } else {
 917                         $del = '';
 918                 }
 919                 return
 920                         '<div id="mw-diff-'.$prefix.'title1"><strong>' .
 921                                 $sk->link(
 922                                         $targetPage,
 923                                         wfMsgHtml(
 924                                                 'revisionasof',
 925                                                 htmlspecialchars( $wgLang->timeanddate( $rev->getTimestamp(), true ) ),
 926                                                 htmlspecialchars( $wgLang->date( $rev->getTimestamp(), true ) ),
 927                                                 htmlspecialchars( $wgLang->time( $rev->getTimestamp(), true ) )
 928                                         ),
 929                                         array(),
 930                                         $targetQuery
 931                                 ) .
 932                         '</strong></div>' .
 933                         '<div id="mw-diff-'.$prefix.'title2">' .
 934                                 $sk->revUserTools( $rev ) . '<br />' .
 935                         '</div>' .
 936                         '<div id="mw-diff-'.$prefix.'title3">' .
 937                                 $sk->revComment( $rev ) . $del . '<br />' .
 938                         '</div>';
 939         }
 940
 941         /**
 942          * Show a form confirming whether a tokenless user really wants to see a file
 943          */
 944         private function showFileConfirmationForm( $key ) {
 945                 global $wgOut, $wgUser, $wgLang;
 946                 $file = new ArchivedFile( $this->mTargetObj, '', $this->mFile );
 947                 $wgOut->addWikiMsg( 'undelete-show-file-confirm',
 948                         $this->mTargetObj->getText(),
 949                         $wgLang->date( $file->getTimestamp() ),
 950                         $wgLang->time( $file->getTimestamp() ) );
 951                 $wgOut->addHTML(
 952                         Xml::openElement( 'form', array(
 953                                 'method' => 'POST',
 954                                 'action' => SpecialPage::getTitleFor( 'Undelete' )->getLocalUrl(
 955                                         'target=' . urlencode( $this->mTarget ) .
 956                                         '&file=' . urlencode( $key ) .
 957                                         '&token=' . urlencode( $wgUser->editToken( $key ) ) )
 958                                 )
 959                         ) .
 960                         Xml::submitButton( wfMsg( 'undelete-show-file-submit' ) ) .
 961                         '</form>'
 962                 );
 963         }
 964
 965         /**
 966          * Show a deleted file version requested by the visitor.
 967          */
 968         private function showFile( $key ) {
 969                 global $wgOut, $wgRequest;
 970                 $wgOut->disable();
 971
 972                 # We mustn't allow the output to be Squid cached, otherwise
 973                 # if an admin previews a deleted image, and it's cached, then
 974                 # a user without appropriate permissions can toddle off and
 975                 # nab the image, and Squid will serve it
 976                 $wgRequest->response()->header( 'Expires: ' . gmdate( 'D, d M Y H:i:s', 0 ) . ' GMT' );
 977                 $wgRequest->response()->header( 'Cache-Control: no-cache, no-store, max-age=0, must-revalidate' );
 978                 $wgRequest->response()->header( 'Pragma: no-cache' );
 979
 980                 global $IP;
 981                 require_once( "$IP/includes/StreamFile.php" );
 982                 $repo = RepoGroup::singleton()->getLocalRepo();
 983                 $path = $repo->getZonePath( 'deleted' ) . '/' . $repo->getDeletedHashPath( $key ) . $key;
 984                 wfStreamFile( $path );
 985         }
 986
 987         private function showHistory( ) {
 988                 global $wgLang, $wgUser, $wgOut;
 989
 990                 $sk = $wgUser->getSkin();
 991                 if( $this->mAllowed ) {
 992                         $wgOut->setPagetitle( wfMsg( "undeletepage" ) );
 993                 } else {
 994                         $wgOut->setPagetitle( wfMsg( 'viewdeletedpage' ) );
 995                 }
 996
 997                 $wgOut->wrapWikiMsg(  "<div class='mw-undelete-pagetitle'>\n$1</div>\n", array ( 'undeletepagetitle', $this->mTargetObj->getPrefixedText() ) );
 998
 999                 $archive = new PageArchive( $this->mTargetObj );
1000                 /*
1001                 $text = $archive->getLastRevisionText();
1002                 if( is_null( $text ) ) {
1003                         $wgOut->addWikiMsg( "nohistory" );
1004                         return;
1005                 }
1006                 */
1007                 $wgOut->addHTML( '<div class="mw-undelete-history">' );
1008                 if ( $this->mAllowed ) {
1009                         $wgOut->addWikiMsg( "undeletehistory" );
1010                         $wgOut->addWikiMsg( "undeleterevdel" );
1011                 } else {
1012                         $wgOut->addWikiMsg( "undeletehistorynoadmin" );
1013                 }
1014                 $wgOut->addHTML( '</div>' );
1015
1016                 # List all stored revisions
1017                 $revisions = $archive->listRevisions();
1018                 $files = $archive->listFiles();
1019
1020                 $haveRevisions = $revisions && $revisions->numRows() > 0;
1021                 $haveFiles = $files && $files->numRows() > 0;
1022
1023                 # Batch existence check on user and talk pages
1024                 if( $haveRevisions ) {
1025                         $batch = new LinkBatch();
1026                         while( $row = $revisions->fetchObject() ) {
1027                                 $batch->addObj( Title::makeTitleSafe( NS_USER, $row->ar_user_text ) );
1028                                 $batch->addObj( Title::makeTitleSafe( NS_USER_TALK, $row->ar_user_text ) );
1029                         }
1030                         $batch->execute();
1031                         $revisions->seek( 0 );
1032                 }
1033                 if( $haveFiles ) {
1034                         $batch = new LinkBatch();
1035                         while( $row = $files->fetchObject() ) {
1036                                 $batch->addObj( Title::makeTitleSafe( NS_USER, $row->fa_user_text ) );
1037                                 $batch->addObj( Title::makeTitleSafe( NS_USER_TALK, $row->fa_user_text ) );
1038                         }
1039                         $batch->execute();
1040                         $files->seek( 0 );
1041                 }
1042
1043                 if ( $this->mAllowed ) {
1044                         $titleObj = SpecialPage::getTitleFor( "Undelete" );
1045                         $action = $titleObj->getLocalURL( array( 'action' => 'submit' ) );
1046                         # Start the form here
1047                         $top = Xml::openElement( 'form', array( 'method' => 'post', 'action' => $action, 'id' => 'undelete' ) );
1048                         $wgOut->addHTML( $top );
1049                 }
1050
1051                 # Show relevant lines from the deletion log:
1052                 $wgOut->addHTML( Xml::element( 'h2', null, LogPage::logName( 'delete' ) ) . "\n" );
1053                 LogEventsList::showLogExtract( $wgOut, 'delete', $this->mTargetObj->getPrefixedText() );
1054                 # Show relevant lines from the suppression log:
1055                 if( $wgUser->isAllowed( 'suppressionlog' ) ) {
1056                         $wgOut->addHTML( Xml::element( 'h2', null, LogPage::logName( 'suppress' ) ) . "\n" );
1057                         LogEventsList::showLogExtract( $wgOut, 'suppress', $this->mTargetObj->getPrefixedText() );
1058                 }
1059
1060                 if( $this->mAllowed && ( $haveRevisions || $haveFiles ) ) {
1061                         # Format the user-visible controls (comment field, submission button)
1062                         # in a nice little table
1063                         if( $wgUser->isAllowed( 'suppressrevision' ) ) {
1064                                 $unsuppressBox =
1065                                         "<tr>
1066                                                 <td>&nbsp;</td>
1067                                                 <td class='mw-input'>" .
1068                                                         Xml::checkLabel( wfMsg('revdelete-unsuppress'), 'wpUnsuppress',
1069                                                                 'mw-undelete-unsuppress', $this->mUnsuppress ).
1070                                                 "</td>
1071                                         </tr>";
1072                         } else {
1073                                 $unsuppressBox = "";
1074                         }
1075                         $table =
1076                                 Xml::fieldset( wfMsg( 'undelete-fieldset-title' ) ) .
1077                                 Xml::openElement( 'table', array( 'id' => 'mw-undelete-table' ) ) .
1078                                         "<tr>
1079                                                 <td colspan='2' class='mw-undelete-extrahelp'>" .
1080                                                         wfMsgWikiHtml( 'undeleteextrahelp' ) .
1081                                                 "</td>
1082                                         </tr>
1083                                         <tr>
1084                                                 <td class='mw-label'>" .
1085                                                         Xml::label( wfMsg( 'undeletecomment' ), 'wpComment' ) .
1086                                                 "</td>
1087                                                 <td class='mw-input'>" .
1088                                                         Xml::input( 'wpComment', 50, $this->mComment, array( 'id' =>  'wpComment' ) ) .
1089                                                 "</td>
1090                                         </tr>
1091                                         <tr>
1092                                                 <td>&nbsp;</td>
1093                                                 <td class='mw-submit'>" .
1094                                                         Xml::submitButton( wfMsg( 'undeletebtn' ), array( 'name' => 'restore', 'id' => 'mw-undelete-submit' ) ) . ' ' .
1095                                                         Xml::element( 'input', array( 'type' => 'reset', 'value' => wfMsg( 'undeletereset' ), 'id' => 'mw-undelete-reset' ) ) . ' ' .
1096                                                         Xml::submitButton( wfMsg( 'undeleteinvert' ), array( 'name' => 'invert', 'id' => 'mw-undelete-invert' ) ) .
1097                                                 "</td>
1098                                         </tr>" .
1099                                         $unsuppressBox .
1100                                 Xml::closeElement( 'table' ) .
1101                                 Xml::closeElement( 'fieldset' );
1102
1103                         $wgOut->addHTML( $table );
1104                 }
1105
1106                 $wgOut->addHTML( Xml::element( 'h2', null, wfMsg( 'history' ) ) . "\n" );
1107
1108                 if( $haveRevisions ) {
1109                         # The page's stored (deleted) history:
1110                         $wgOut->addHTML("<ul>");
1111                         $target = urlencode( $this->mTarget );
1112                         $remaining = $revisions->numRows();
1113                         $earliestLiveTime = $this->mTargetObj->getEarliestRevTime();
1114
1115                         while( $row = $revisions->fetchObject() ) {
1116                                 $remaining--;
1117                                 $wgOut->addHTML( $this->formatRevisionRow( $row, $earliestLiveTime, $remaining, $sk ) );
1118                         }
1119                         $revisions->free();
1120                         $wgOut->addHTML("</ul>");
1121                 } else {
1122                         $wgOut->addWikiMsg( "nohistory" );
1123                 }
1124
1125                 if( $haveFiles ) {
1126                         $wgOut->addHTML( Xml::element( 'h2', null, wfMsg( 'filehist' ) ) . "\n" );
1127                         $wgOut->addHTML( "<ul>" );
1128                         while( $row = $files->fetchObject() ) {
1129                                 $wgOut->addHTML( $this->formatFileRow( $row, $sk ) );
1130                         }
1131                         $files->free();
1132                         $wgOut->addHTML( "</ul>" );
1133                 }
1134
1135                 if ( $this->mAllowed ) {
1136                         # Slip in the hidden controls here
1137                         $misc  = Xml::hidden( 'target', $this->mTarget );
1138                         $misc .= Xml::hidden( 'wpEditToken', $wgUser->editToken() );
1139                         $misc .= Xml::closeElement( 'form' );
1140                         $wgOut->addHTML( $misc );
1141                 }
1142
1143                 return true;
1144         }
1145
1146         private function formatRevisionRow( $row, $earliestLiveTime, $remaining, $sk ) {
1147                 global $wgUser, $wgLang;
1148
1149                 $rev = Revision::newFromArchiveRow( $row,
1150                         array( 'page' => $this->mTargetObj->getArticleId() ) );
1151                 $stxt = '';
1152                 $ts = wfTimestamp( TS_MW, $row->ar_timestamp );
1153                 // Build checkboxen...
1154                 if( $this->mAllowed ) {
1155                         if( $this->mInvert ) {
1156                                 if( in_array( $ts, $this->mTargetTimestamp ) ) {
1157                                         $checkBox = Xml::check( "ts$ts");
1158                                 } else {
1159                                         $checkBox = Xml::check( "ts$ts", true );
1160                                 }
1161                         } else {
1162                                 $checkBox = Xml::check( "ts$ts" );
1163                         }
1164                 } else {
1165                         $checkBox = '';
1166                 }
1167                 // Build page & diff links...
1168                 if( $this->mCanView ) {
1169                         $titleObj = SpecialPage::getTitleFor( "Undelete" );
1170                         # Last link
1171                         if( !$rev->userCan( Revision::DELETED_TEXT ) ) {
1172                                 $pageLink = htmlspecialchars( $wgLang->timeanddate( $ts, true ) );
1173                                 $last = wfMsgHtml('diff');
1174                         } else if( $remaining > 0 || ($earliestLiveTime && $ts > $earliestLiveTime) ) {
1175                                 $pageLink = $this->getPageLink( $rev, $titleObj, $ts, $sk );
1176                                 $last = $sk->linkKnown(
1177                                         $titleObj,
1178                                         wfMsgHtml('diff'),
1179                                         array(),
1180                                         array(
1181                                                 'target' => $this->mTargetObj->getPrefixedText(),
1182                                                 'timestamp' => $ts,
1183                                                 'diff' => 'prev'
1184                                         )
1185                                 );
1186                         } else {
1187                                 $pageLink = $this->getPageLink( $rev, $titleObj, $ts, $sk );
1188                                 $last = wfMsgHtml('diff');
1189                         }
1190                 } else {
1191                         $pageLink = htmlspecialchars( $wgLang->timeanddate( $ts, true ) );
1192                         $last = wfMsgHtml('diff');
1193                 }
1194                 // User links
1195                 $userLink = $sk->revUserTools( $rev );
1196                 // Revision text size
1197                 if( !is_null($size = $row->ar_len) ) {
1198                         $stxt = $sk->formatRevisionSize( $size );
1199                 }
1200                 // Edit summary
1201                 $comment = $sk->revComment( $rev );
1202                 // Revision delete links
1203                 $canHide = $wgUser->isAllowed( 'deleterevision' );
1204                 if( $canHide || ($rev->getVisibility() && $wgUser->isAllowed('deletedhistory')) ) {
1205                         if( !$rev->userCan( Revision::DELETED_RESTRICTED ) ) {
1206                                 $revdlink = $sk->revDeleteLinkDisabled( $canHide ); // revision was hidden from sysops
1207                         } else {
1208                                 $query = array(
1209                                         'type'   => 'archive',
1210                                         'target' => $this->mTargetObj->getPrefixedDBkey(),
1211                                         'ids'    => $ts
1212                                 );
1213                                 $revdlink = $sk->revDeleteLink( $query,
1214                                         $rev->isDeleted( Revision::DELETED_RESTRICTED ), $canHide );
1215                         }
1216                 } else {
1217                         $revdlink = '';
1218                 }
1219                 return "<li>$checkBox $revdlink ($last) $pageLink . . $userLink $stxt $comment</li>";
1220         }
1221
1222         private function formatFileRow( $row, $sk ) {
1223                 global $wgUser, $wgLang;
1224
1225                 $file = ArchivedFile::newFromRow( $row );
1226
1227                 $ts = wfTimestamp( TS_MW, $row->fa_timestamp );
1228                 if( $this->mAllowed && $row->fa_storage_key ) {
1229                         $checkBox = Xml::check( "fileid" . $row->fa_id );
1230                         $key = urlencode( $row->fa_storage_key );
1231                         $target = urlencode( $this->mTarget );
1232                         $titleObj = SpecialPage::getTitleFor( "Undelete" );
1233                         $pageLink = $this->getFileLink( $file, $titleObj, $ts, $key, $sk );
1234                 } else {
1235                         $checkBox = '';
1236                         $pageLink = $wgLang->timeanddate( $ts, true );
1237                 }
1238                 $userLink = $this->getFileUser( $file, $sk );
1239                 $data =
1240                         wfMsg( 'widthheight',
1241                                 $wgLang->formatNum( $row->fa_width ),
1242                                 $wgLang->formatNum( $row->fa_height ) ) .
1243                         ' (' .
1244                         wfMsg( 'nbytes', $wgLang->formatNum( $row->fa_size ) ) .
1245                         ')';
1246                 $data = htmlspecialchars( $data );
1247                 $comment = $this->getFileComment( $file, $sk );
1248                 // Add show/hide deletion links if available
1249                 $canHide = $wgUser->isAllowed( 'deleterevision' );
1250                 if( $canHide || ($file->getVisibility() && $wgUser->isAllowed('deletedhistory')) ) {
1251                         if( !$file->userCan(File::DELETED_RESTRICTED ) ) {
1252                                 $revdlink = $sk->revDeleteLinkDisabled( $canHide ); // revision was hidden from sysops
1253                         } else {
1254                                 $query = array(
1255                                         'type' => 'filearchive',
1256                                         'target' => $this->mTargetObj->getPrefixedDBkey(),
1257                                         'ids' => $row->fa_id
1258                                 );
1259                                 $revdlink = $sk->revDeleteLink( $query,
1260                                         $file->isDeleted( File::DELETED_RESTRICTED ), $canHide );
1261                         }
1262                 } else {
1263                         $revdlink = '';
1264                 }
1265                 return "<li>$checkBox $revdlink $pageLink . . $userLink $data $comment</li>\n";
1266         }
1267
1268         /**
1269          * Fetch revision text link if it's available to all users
1270          * @return string
1271          */
1272         function getPageLink( $rev, $titleObj, $ts, $sk ) {
1273                 global $wgLang;
1274
1275                 $time = htmlspecialchars( $wgLang->timeanddate( $ts, true ) );
1276
1277                 if( !$rev->userCan(Revision::DELETED_TEXT) ) {
1278                         return '<span class="history-deleted">' . $time . '</span>';
1279                 } else {
1280                         $link = $sk->linkKnown(
1281                                 $titleObj,
1282                                 $time,
1283                                 array(),
1284                                 array(
1285                                         'target' => $this->mTargetObj->getPrefixedText(),
1286                                         'timestamp' => $ts
1287                                 )
1288                         );
1289                         if( $rev->isDeleted(Revision::DELETED_TEXT) )
1290                                 $link = '<span class="history-deleted">' . $link . '</span>';
1291                         return $link;
1292                 }
1293         }
1294
1295         /**
1296          * Fetch image view link if it's available to all users
1297          * @return string
1298          */
1299         function getFileLink( $file, $titleObj, $ts, $key, $sk ) {
1300                 global $wgLang, $wgUser;
1301
1302                 if( !$file->userCan(File::DELETED_FILE) ) {
1303                         return '<span class="history-deleted">' . $wgLang->timeanddate( $ts, true ) . '</span>';
1304                 } else {
1305                         $link = $sk->linkKnown(
1306                                 $titleObj,
1307                                 $wgLang->timeanddate( $ts, true ),
1308                                 array(),
1309                                 array(
1310                                         'target' => $this->mTargetObj->getPrefixedText(),
1311                                         'file' => $key,
1312                                         'token' => $wgUser->editToken( $key )
1313                                 )
1314                         );
1315                         if( $file->isDeleted(File::DELETED_FILE) )
1316                                 $link = '<span class="history-deleted">' . $link . '</span>';
1317                         return $link;
1318                 }
1319         }
1320
1321         /**
1322          * Fetch file's user id if it's available to this user
1323          * @return string
1324          */
1325         function getFileUser( $file, $sk ) {
1326                 if( !$file->userCan(File::DELETED_USER) ) {
1327                         return '<span class="history-deleted">' . wfMsgHtml( 'rev-deleted-user' ) . '</span>';
1328                 } else {
1329                         $link = $sk->userLink( $file->getRawUser(), $file->getRawUserText() ) .
1330                                 $sk->userToolLinks( $file->getRawUser(), $file->getRawUserText() );
1331                         if( $file->isDeleted(File::DELETED_USER) )
1332                                 $link = '<span class="history-deleted">' . $link . '</span>';
1333                         return $link;
1334                 }
1335         }
1336
1337         /**
1338          * Fetch file upload comment if it's available to this user
1339          * @return string
1340          */
1341         function getFileComment( $file, $sk ) {
1342                 if( !$file->userCan(File::DELETED_COMMENT) ) {
1343                         return '<span class="history-deleted"><span class="comment">' . wfMsgHtml( 'rev-deleted-comment' ) . '</span></span>';
1344                 } else {
1345                         $link = $sk->commentBlock( $file->getRawDescription() );
1346                         if( $file->isDeleted(File::DELETED_COMMENT) )
1347                                 $link = '<span class="history-deleted">' . $link . '</span>';
1348                         return $link;
1349                 }
1350         }
1351
1352         function undelete() {
1353                 global $wgOut, $wgUser;
1354                 if ( wfReadOnly() ) {
1355                         $wgOut->readOnlyPage();
1356                         return;
1357                 }
1358                 if( !is_null( $this->mTargetObj ) ) {
1359                         $archive = new PageArchive( $this->mTargetObj );
1360                         $ok = $archive->undelete(
1361                                 $this->mTargetTimestamp,
1362                                 $this->mComment,
1363                                 $this->mFileVersions,
1364                                 $this->mUnsuppress );
1365
1366                         if( is_array($ok) ) {
1367                                 if ( $ok[1] ) // Undeleted file count
1368                                         wfRunHooks( 'FileUndeleteComplete', array(
1369                                                 $this->mTargetObj, $this->mFileVersions,
1370                                                 $wgUser, $this->mComment) );
1371
1372                                 $skin = $wgUser->getSkin();
1373                                 $link = $skin->linkKnown( $this->mTargetObj );
1374                                 $wgOut->addHTML( wfMsgWikiHtml( 'undeletedpage', $link ) );
1375                         } else {
1376                                 $wgOut->showFatalError( wfMsg( "cannotundelete" ) );
1377                                 $wgOut->addHTML( '<p>' . wfMsgHtml( "undeleterevdel" ) . '</p>' );
1378                         }
1379
1380                         // Show file deletion warnings and errors
1381                         $status = $archive->getFileStatus();
1382                         if( $status && !$status->isGood() ) {
1383                                 $wgOut->addWikiText( $status->getWikiText( 'undelete-error-short', 'undelete-error-long' ) );
1384                         }
1385                 } else {
1386                         $wgOut->showFatalError( wfMsg( "cannotundelete" ) );
1387                 }
1388                 return false;
1389         }
1390 }