includes/specials/SpecialRevisiondelete.php

   1 <?php
   2 /**
   3  * Special page allowing users with the appropriate permissions to view
   4  * and hide revisions. Log items can also be hidden.
   5  *
   6  * @file
   7  * @ingroup SpecialPage
   8  */
   9
  10 class SpecialRevisionDelete extends UnlistedSpecialPage {
  11
  12         public function __construct() {
  13                 parent::__construct( 'Revisiondelete', 'deleterevision' );
  14                 $this->includable( false ); // paranoia
  15         }
  16
  17         public function execute( $par ) {
  18                 global $wgOut, $wgUser, $wgRequest;
  19                 if( !$wgUser->isAllowed( 'deleterevision' ) ) {
  20                         return $wgOut->permissionRequired( 'deleterevision' );
  21                 } else if( wfReadOnly() ) {
  22                         return $wgOut->readOnlyPage();
  23                 }
  24                 $this->skin =& $wgUser->getSkin();
  25                 $this->setHeaders();
  26                 $this->outputHeader();
  27                 $this->wasPosted = $wgRequest->wasPosted();
  28                 # Set title and such
  29                 $this->target = $wgRequest->getText( 'target' );
  30                 # Handle our many different possible input types.
  31                 # Use CVS, since the cgi handling will break on arrays.
  32                 $this->oldids = explode( ',', $wgRequest->getVal('oldid') );
  33                 $this->oldids = array_unique( array_filter($this->oldids) );
  34                 $this->artimestamps = explode( ',', $wgRequest->getVal('artimestamp') );
  35                 $this->artimestamps = array_unique( array_filter($this->artimestamps) );
  36                 $this->logids = explode( ',', $wgRequest->getVal('logid') );
  37                 $this->logids = array_unique( array_filter($this->logids) );
  38                 $this->oldimgs = explode( ',', $wgRequest->getVal('oldimage') );
  39                 $this->oldimgs = array_unique( array_filter($this->oldimgs) );
  40                 $this->fileids = explode( ',', $wgRequest->getVal('fileid') );
  41                 $this->fileids = array_unique( array_filter($this->fileids) );
  42                 # For reviewing deleted files...
  43                 $this->file = $wgRequest->getVal( 'file' );
  44                 # Only one target set at a time please!
  45                 $types = (bool)$this->file + (bool)$this->oldids + (bool)$this->logids
  46                         + (bool)$this->artimestamps + (bool)$this->fileids + (bool)$this->oldimgs;
  47                 # No targets?
  48                 if( $types == 0 ) {
  49                         return $wgOut->showErrorPage( 'revdelete-nooldid-title', 'revdelete-nooldid-text' );
  50                 # Too many targets?
  51                 } else if( $types > 1 ) {
  52                         return $wgOut->showErrorPage( 'revdelete-toomanytargets-title', 'revdelete-toomanytargets-text' );
  53                 }
  54                 $this->page = Title::newFromUrl( $this->target );
  55                 $this->contextPage = Title::newFromUrl( $wgRequest->getText( 'page' ) );
  56                 # If we have revisions, get the title from the first one
  57                 # since they should all be from the same page. This allows
  58                 # for more flexibility with page moves...
  59                 if( count($this->oldids) > 0 ) {
  60                         $rev = Revision::newFromId( $this->oldids[0] );
  61                         $this->page = $rev ? $rev->getTitle() : $this->page;
  62                 }
  63                 # We need a target page!
  64                 if( is_null($this->page) ) {
  65                         return $wgOut->addWikiMsg( 'undelete-header' );
  66                 }
  67                 # For reviewing deleted files...show it now if allowed
  68                 if( $this->file ) {
  69                         return $this->tryShowFile( $this->file );
  70                 }
  71                 # Logs must have a type given
  72                 if( $this->logids && !strpos($this->page->getDBKey(),'/') ) {
  73                         return $wgOut->showErrorPage( 'revdelete-nologtype-title', 'revdelete-nologtype-text' );
  74                 }
  75                 # Give a link to the logs/hist for this page
  76                 $this->showConvenienceLinks();
  77                 # Lock the operation and the form context
  78                 $this->secureOperation();
  79                 # Either submit or create our form
  80                 if( $this->wasPosted ) {
  81                         $this->submit( $wgRequest );
  82                 } else if( $this->deleteKey == 'oldid' || $this->deleteKey == 'artimestamp' ) {
  83                         $this->showRevs();
  84                 } else if( $this->deleteKey == 'fileid' || $this->deleteKey == 'oldimage' ) {
  85                         $this->showImages();
  86                 } else if( $this->deleteKey == 'logid' ) {
  87                         $this->showLogItems();
  88                         return; // no logs for now
  89                 }
  90                 list($qc,$lim) = $this->getLogQueryCond();
  91                 # Show relevant lines from the deletion log
  92                 $wgOut->addHTML( "<h2>" . htmlspecialchars( LogPage::logName( 'delete' ) ) . "</h2>\n" );
  93                 LogEventsList::showLogExtract( $wgOut, 'delete', $this->page->getPrefixedText(), '', $lim, $qc );
  94                 # Show relevant lines from the suppression log
  95                 if( $wgUser->isAllowed( 'suppressionlog' ) ) {
  96                         $wgOut->addHTML( "<h2>" . htmlspecialchars( LogPage::logName( 'suppress' ) ) . "</h2>\n" );
  97                         LogEventsList::showLogExtract( $wgOut, 'suppress', $this->page->getPrefixedText(), '', $lim, $qc );
  98                 }
  99         }
 100
 101         private function showConvenienceLinks() {
 102                 global $wgOut, $wgUser;
 103                 # Give a link to the logs/hist for this page
 104                 if( !is_null($this->page) && $this->page->getNamespace() > -1 ) {
 105                         $links = array();
 106                         $logtitle = SpecialPage::getTitleFor( 'Log' );
 107                         $links[] = $this->skin->makeKnownLinkObj( $logtitle, wfMsgHtml( 'viewpagelogs' ),
 108                                 wfArrayToCGI( array( 'page' => $this->page->getPrefixedUrl() ) ) );
 109                         # Give a link to the page history
 110                         $links[] = $this->skin->makeKnownLinkObj( $this->page, wfMsgHtml( 'pagehist' ),
 111                                 wfArrayToCGI( array( 'action' => 'history' ) ) );
 112                         # Link to deleted edits
 113                         if( $wgUser->isAllowed('undelete') ) {
 114                                 $undelete = SpecialPage::getTitleFor( 'Undelete' );
 115                                 $links[] = $this->skin->makeKnownLinkObj( $undelete, wfMsgHtml( 'deletedhist' ),
 116                                         wfArrayToCGI( array( 'target' => $this->page->getPrefixedDBkey() ) ) );
 117                         }
 118                         # Logs themselves don't have histories or archived revisions
 119                         $wgOut->setSubtitle( '<p>'.implode($links,' / ').'</p>' );
 120                 }
 121         }
 122
 123         private function getLogQueryCond() {
 124                 $ids = $safeIds = array();
 125                 $limit = 25; // default
 126                 $conds = array( 'log_action' => 'revision' ); // revision delete logs
 127                 switch( $this->deleteKey ) {
 128                         case 'oldid':
 129                                 $ids = $this->oldids;
 130                                 break;
 131                         case 'artimestamp':
 132                                 $ids = $this->artimestamps;
 133                                 break;
 134                         case 'oldimage':
 135                                 $ids = $this->oldimgs;
 136                                 break;
 137                         case 'fileid':
 138                                 $ids = $this->fileids;
 139                                 break;
 140                         default: // bad type?
 141                                 return array($conds,$limit);
 142                 }
 143                 // Just get the whole log if there are a lot if items
 144                 if( count($ids) > $limit )
 145                         return array($conds,$limit);
 146                 // Digit chars only
 147                 foreach( $ids as $id ) {
 148                         if( preg_match( '/^\d+$/', $id, $m ) ) {
 149                                 $safeIds[] = $m[0];
 150                         }
 151                 }
 152                 // Format is <id1,id2,i3...>
 153                 if( count($safeIds) ) {
 154                         $conds[] = "log_params RLIKE '^{$this->deleteKey}.*(^|\n|,)(".implode('|',$safeIds).")(,|\n|$)'";
 155                 } else {
 156                         $conds = array('1=0');
 157                 }
 158                 return array($conds,$limit);
 159         }
 160
 161         private function secureOperation() {
 162                 global $wgUser;
 163                 $this->deleteKey = '';
 164                 // At this point, we should only have one of these
 165                 if( $this->oldids ) {
 166                         $this->revisions = $this->oldids;
 167                         $hide_content_name = array( 'revdelete-hide-text', 'wpHideText', Revision::DELETED_TEXT );
 168                         $this->deleteKey = 'oldid';
 169                 } else if( $this->artimestamps ) {
 170                         $this->archrevs = $this->artimestamps;
 171                         $hide_content_name = array( 'revdelete-hide-text', 'wpHideText', Revision::DELETED_TEXT );
 172                         $this->deleteKey = 'artimestamp';
 173                 } else if( $this->oldimgs ) {
 174                         $this->ofiles = $this->oldimgs;
 175                         $hide_content_name = array( 'revdelete-hide-image', 'wpHideImage', File::DELETED_FILE );
 176                         $this->deleteKey = 'oldimage';
 177                 } else if( $this->fileids ) {
 178                         $this->afiles = $this->fileids;
 179                         $hide_content_name = array( 'revdelete-hide-image', 'wpHideImage', File::DELETED_FILE );
 180                         $this->deleteKey = 'fileid';
 181                 } else if( $this->logids ) {
 182                         $this->events = $this->logids;
 183                         $hide_content_name = array( 'revdelete-hide-name', 'wpHideName', LogPage::DELETED_ACTION );
 184                         $this->deleteKey = 'logid';
 185                 }
 186                 // Our checkbox messages depends one what we are doing,
 187                 // e.g. we don't hide "text" for logs or images
 188                 $this->checks = array(
 189                         $hide_content_name,
 190                         array( 'revdelete-hide-comment', 'wpHideComment', Revision::DELETED_COMMENT ),
 191                         array( 'revdelete-hide-user', 'wpHideUser', Revision::DELETED_USER )
 192                 );
 193                 if( $wgUser->isAllowed('suppressrevision') ) {
 194                         $this->checks[] = array( 'revdelete-hide-restricted',
 195                                 'wpHideRestricted', Revision::DELETED_RESTRICTED );
 196                 }
 197         }
 198
 199         /**
 200          * Show a deleted file version requested by the visitor.
 201          */
 202         private function tryShowFile( $key ) {
 203                 global $wgOut, $wgRequest;
 204                 $oimage = RepoGroup::singleton()->getLocalRepo()->newFromArchiveName( $this->page, $key );
 205                 $oimage->load();
 206                 // Check if user is allowed to see this file
 207                 if( !$oimage->userCan(File::DELETED_FILE) ) {
 208                         $wgOut->permissionRequired( 'suppressrevision' );
 209                 } else {
 210                         $wgOut->disable();
 211                         # We mustn't allow the output to be Squid cached, otherwise
 212                         # if an admin previews a deleted image, and it's cached, then
 213                         # a user without appropriate permissions can toddle off and
 214                         # nab the image, and Squid will serve it
 215                         $wgRequest->response()->header( 'Expires: ' . gmdate( 'D, d M Y H:i:s', 0 ) . ' GMT' );
 216                         $wgRequest->response()->header( 'Cache-Control: no-cache, no-store, max-age=0, must-revalidate' );
 217                         $wgRequest->response()->header( 'Pragma: no-cache' );
 218                         # Stream the file to the client
 219                         $store = FileStore::get( 'deleted' );
 220                         $store->stream( $key );
 221                 }
 222         }
 223
 224         /**
 225          * This lets a user set restrictions for live and archived revisions
 226          */
 227         private function showRevs() {
 228                 global $wgOut, $wgUser;
 229                 $UserAllowed = true;
 230
 231                 $count = ($this->deleteKey == 'oldid') ?
 232                         count($this->revisions) : count($this->archrevs);
 233                 $wgOut->addWikiMsg( 'revdelete-selected', $this->page->getPrefixedText(), $count );
 234
 235                 $bitfields = 0;
 236                 $wgOut->addHTML( "<ul>" );
 237
 238                 $where = $revObjs = array();
 239                 $dbr = wfGetDB( DB_MASTER );
 240
 241                 $revisions = 0;
 242                 // Live revisions...
 243                 if( $this->deleteKey == 'oldid' ) {
 244                         // Run through and pull all our data in one query
 245                         foreach( $this->revisions as $revid ) {
 246                                 $where[] = intval($revid);
 247                         }
 248                         $result = $dbr->select( array('revision','page'), '*',
 249                                 array(
 250                                         'rev_page' => $this->page->getArticleID(),
 251                                         'rev_id'   => $where,
 252                                         'rev_page = page_id'
 253                                 ),
 254                                 __METHOD__
 255                         );
 256                         while( $row = $dbr->fetchObject( $result ) ) {
 257                                 $revObjs[$row->rev_id] = new Revision( $row );
 258                         }
 259                         foreach( $this->revisions as $revid ) {
 260                                 if( !isset($revObjs[$revid]) ) continue; // Must exist
 261                                 // Check if the revision was Oversighted
 262                                 if( !$revObjs[$revid]->userCan(Revision::DELETED_RESTRICTED) ) {
 263                                         if( !$this->wasPosted ) {
 264                                                 return $wgOut->permissionRequired( 'suppressrevision' );
 265                                         }
 266                                         $UserAllowed = false;
 267                                 }
 268                                 $revisions++;
 269                                 $wgOut->addHTML( $this->historyLine( $revObjs[$revid] ) );
 270                                 $bitfields |= $revObjs[$revid]->mDeleted;
 271                         }
 272                 // The archives...
 273                 } else {
 274                         // Run through and pull all our data in one query
 275                         foreach( $this->archrevs as $timestamp ) {
 276                                 $where[] = $dbr->timestamp( $timestamp );
 277                         }
 278                         $result = $dbr->select( 'archive', '*',
 279                                 array(
 280                                         'ar_namespace' => $this->page->getNamespace(),
 281                                         'ar_title'     => $this->page->getDBKey(),
 282                                         'ar_timestamp' => $where
 283                                 ),
 284                                 __METHOD__
 285                         );
 286                         while( $row = $dbr->fetchObject( $result ) ) {
 287                                 $timestamp = wfTimestamp( TS_MW, $row->ar_timestamp );
 288                                 $revObjs[$timestamp] = new Revision( array(
 289                                         'page'       => $this->page->getArticleId(),
 290                                         'id'         => $row->ar_rev_id,
 291                                         'text'       => $row->ar_text_id,
 292                                         'comment'    => $row->ar_comment,
 293                                         'user'       => $row->ar_user,
 294                                         'user_text'  => $row->ar_user_text,
 295                                         'timestamp'  => $timestamp,
 296                                         'minor_edit' => $row->ar_minor_edit,
 297                                         'text_id'    => $row->ar_text_id,
 298                                         'deleted'    => $row->ar_deleted,
 299                                         'len'        => $row->ar_len) );
 300                         }
 301                         foreach( $this->archrevs as $timestamp ) {
 302                                 if( !isset($revObjs[$timestamp]) ) {
 303                                         continue;
 304                                 } else if( !$revObjs[$timestamp]->userCan(Revision::DELETED_RESTRICTED) ) {
 305                                 // If a rev is hidden from sysops
 306                                         if( !$this->wasPosted ) {
 307                                                 return $wgOut->permissionRequired( 'suppressrevision' );
 308                                         }
 309                                         $UserAllowed = false;
 310                                 }
 311                                 $revisions++;
 312                                 $wgOut->addHTML( $this->historyLine( $revObjs[$timestamp] ) );
 313                                 $bitfields |= $revObjs[$timestamp]->mDeleted;
 314                         }
 315                 }
 316                 if( !$revisions ) {
 317                         return $wgOut->showErrorPage( 'revdelete-nooldid-title', 'revdelete-nooldid-text' );
 318                 }
 319
 320                 $wgOut->addHTML( "</ul>" );
 321                 // Explanation text
 322                 $this->addUsageText();
 323
 324                 // Normal sysops can always see what they did, but can't always change it
 325                 if( !$UserAllowed ) return;
 326
 327                 $items = array(
 328                         Xml::inputLabel( wfMsg( 'revdelete-log' ), 'wpReason', 'wpReason', 60 ),
 329                         Xml::submitButton( wfMsg( 'revdelete-submit' ) )
 330                 );
 331                 $hidden = array(
 332                         Xml::hidden( 'wpEditToken', $wgUser->editToken() ),
 333                         Xml::hidden( 'target', $this->page->getPrefixedText() ),
 334                         Xml::hidden( 'type', $this->deleteKey )
 335                 );
 336                 if( $this->deleteKey == 'oldid' ) {
 337                         $hidden[] = Xml::hidden( 'oldid', implode(',',$this->oldids) );
 338                 } else {
 339                         $hidden[] = Xml::hidden( 'artimestamp', implode(',',$this->artimestamps) );
 340                 }
 341                 $wgOut->addHTML(
 342                         Xml::openElement( 'form', array( 'method' => 'post',
 343                                 'action' => $this->getTitle()->getLocalUrl( 'action=submit' ),
 344                                 'id' => 'mw-revdel-form-revisions' ) ) .
 345                         Xml::openElement( 'fieldset' ) .
 346                         xml::element( 'legend', null,  wfMsg( 'revdelete-legend' ) )
 347                 );
 348
 349                 $wgOut->addHTML( $this->buildCheckBoxes( $bitfields ) );
 350                 foreach( $items as $item ) {
 351                         $wgOut->addHTML( Xml::tags( 'p', null, $item ) );
 352                 }
 353                 foreach( $hidden as $item ) {
 354                         $wgOut->addHTML( $item );
 355                 }
 356                 $wgOut->addHTML(
 357                         Xml::closeElement( 'fieldset' ) .
 358                         Xml::closeElement( 'form' ) . "\n"
 359                 );
 360         }
 361
 362         /**
 363          * This lets a user set restrictions for archived images
 364          */
 365         private function showImages() {
 366                 global $wgOut, $wgUser, $wgLang;
 367                 $UserAllowed = true;
 368
 369                 $count = ($this->deleteKey == 'oldimage') ? count($this->ofiles) : count($this->afiles);
 370                 $wgOut->addWikiMsg( 'revdelete-selected', $this->page->getPrefixedText(),
 371                         $wgLang->formatNum($count) );
 372
 373                 $bitfields = 0;
 374                 $wgOut->addHTML( "<ul>" );
 375
 376                 $where = $filesObjs = array();
 377                 $dbr = wfGetDB( DB_MASTER );
 378                 // Live old revisions...
 379                 $revisions = 0;
 380                 if( $this->deleteKey == 'oldimage' ) {
 381                         // Run through and pull all our data in one query
 382                         foreach( $this->ofiles as $timestamp ) {
 383                                 $where[] = $timestamp.'!'.$this->page->getDBKey();
 384                         }
 385                         $result = $dbr->select( 'oldimage', '*',
 386                                 array(
 387                                         'oi_name'         => $this->page->getDBKey(),
 388                                         'oi_archive_name' => $where
 389                                 ),
 390                                 __METHOD__
 391                         );
 392                         while( $row = $dbr->fetchObject( $result ) ) {
 393                                 $filesObjs[$row->oi_archive_name] = RepoGroup::singleton()->getLocalRepo()->newFileFromRow( $row );
 394                                 $filesObjs[$row->oi_archive_name]->user = $row->oi_user;
 395                                 $filesObjs[$row->oi_archive_name]->user_text = $row->oi_user_text;
 396                         }
 397                         // Check through our images
 398                         foreach( $this->ofiles as $timestamp ) {
 399                                 $archivename = $timestamp.'!'.$this->page->getDBKey();
 400                                 if( !isset($filesObjs[$archivename]) ) {
 401                                         continue;
 402                                 } else if( !$filesObjs[$archivename]->userCan(File::DELETED_RESTRICTED) ) {
 403                                         // If a rev is hidden from sysops
 404                                         if( !$this->wasPosted ) {
 405                                                 return $wgOut->permissionRequired( 'suppressrevision' );
 406                                         }
 407                                         $UserAllowed = false;
 408                                 }
 409                                 $revisions++;
 410                                 // Inject history info
 411                                 $wgOut->addHTML( $this->fileLine( $filesObjs[$archivename] ) );
 412                                 $bitfields |= $filesObjs[$archivename]->deleted;
 413                         }
 414                 // Archived files...
 415                 } else {
 416                         // Run through and pull all our data in one query
 417                         foreach( $this->afiles as $id ) {
 418                                 $where[] = intval($id);
 419                         }
 420                         $result = $dbr->select( 'filearchive', '*',
 421                                 array(
 422                                         'fa_name' => $this->page->getDBKey(),
 423                                         'fa_id'   => $where
 424                                 ),
 425                                 __METHOD__
 426                         );
 427                         while( $row = $dbr->fetchObject( $result ) ) {
 428                                 $filesObjs[$row->fa_id] = ArchivedFile::newFromRow( $row );
 429                         }
 430
 431                         foreach( $this->afiles as $fileid ) {
 432                                 if( !isset($filesObjs[$fileid]) ) {
 433                                         continue;
 434                                 } else if( !$filesObjs[$fileid]->userCan(File::DELETED_RESTRICTED) ) {
 435                                         // If a rev is hidden from sysops
 436                                         if( !$this->wasPosted ) {
 437                                                 return $wgOut->permissionRequired( 'suppressrevision' );
 438                                         }
 439                                         $UserAllowed = false;
 440                                 }
 441                                 $revisions++;
 442                                 // Inject history info
 443                                 $wgOut->addHTML( $this->archivedfileLine( $filesObjs[$fileid] ) );
 444                                 $bitfields |= $filesObjs[$fileid]->deleted;
 445                         }
 446                 }
 447                 if( !$revisions ) {
 448                         return $wgOut->showErrorPage( 'revdelete-nooldid-title','revdelete-nooldid-text' );
 449                 }
 450
 451                 $wgOut->addHTML( "</ul>" );
 452                 // Explanation text
 453                 $this->addUsageText();
 454                 // Normal sysops can always see what they did, but can't always change it
 455                 if( !$UserAllowed ) return;
 456
 457                 $items = array(
 458                         Xml::inputLabel( wfMsg( 'revdelete-log' ), 'wpReason', 'wpReason', 60 ),
 459                         Xml::submitButton( wfMsg( 'revdelete-submit' ) )
 460                 );
 461                 $hidden = array(
 462                         Xml::hidden( 'wpEditToken', $wgUser->editToken() ),
 463                         Xml::hidden( 'target', $this->page->getPrefixedText() ),
 464                         Xml::hidden( 'type', $this->deleteKey )
 465                 );
 466                 if( $this->deleteKey == 'oldimage' ) {
 467                         $hidden[] = Xml::hidden( 'oldimage', implode(',',$this->oldimgs) );
 468                 } else {
 469                         $hidden[] = Xml::hidden( 'fileid', implode(',',$this->fileids) );
 470                 }
 471                 $wgOut->addHTML(
 472                         Xml::openElement( 'form', array( 'method' => 'post',
 473                                 'action' => $this->getTitle()->getLocalUrl( 'action=submit' ),
 474                                 'id' => 'mw-revdel-form-filerevisions' )
 475                         ) .
 476                         Xml::fieldset( wfMsg( 'revdelete-legend' ) )
 477                 );
 478
 479                 $wgOut->addHTML( $this->buildCheckBoxes( $bitfields ) );
 480                 foreach( $items as $item ) {
 481                         $wgOut->addHTML( "<p>$item</p>" );
 482                 }
 483                 foreach( $hidden as $item ) {
 484                         $wgOut->addHTML( $item );
 485                 }
 486
 487                 $wgOut->addHTML(
 488                         Xml::closeElement( 'fieldset' ) .
 489                         Xml::closeElement( 'form' ) . "\n"
 490                 );
 491         }
 492
 493         /**
 494          * This lets a user set restrictions for log items
 495          */
 496         private function showLogItems() {
 497                 global $wgOut, $wgUser, $wgMessageCache, $wgLang;
 498                 $UserAllowed = true;
 499
 500                 $wgOut->addWikiMsg( 'logdelete-selected', $wgLang->formatNum( count($this->events) ) );
 501
 502                 $bitfields = 0;
 503                 $wgOut->addHTML( "<ul>" );
 504
 505                 $where = $logRows = array();
 506                 $dbr = wfGetDB( DB_MASTER );
 507                 // Run through and pull all our data in one query
 508                 $logItems = 0;
 509                 foreach( $this->events as $logid ) {
 510                         $where[] = intval($logid);
 511                 }
 512                 list($log,$logtype) = explode( '/',$this->page->getDBKey(), 2 );
 513                 $result = $dbr->select( 'logging', '*',
 514                         array( 'log_type' => $logtype, 'log_id' => $where ),
 515                         __METHOD__
 516                 );
 517                 while( $row = $dbr->fetchObject( $result ) ) {
 518                         $logRows[$row->log_id] = $row;
 519                 }
 520                 $wgMessageCache->loadAllMessages();
 521                 foreach( $this->events as $logid ) {
 522                         // Don't hide from oversight log!!!
 523                         if( !isset( $logRows[$logid] ) || $logRows[$logid]->log_type=='suppress' ) {
 524                                 continue;
 525                         } else if( !LogEventsList::userCan( $logRows[$logid],Revision::DELETED_RESTRICTED) ) {
 526                         // If an event is hidden from sysops
 527                                 if( !$this->wasPosted ) {
 528                                         return $wgOut->permissionRequired( 'suppressrevision' );
 529                                 }
 530                                 $UserAllowed = false;
 531                         }
 532                         $logItems++;
 533                         $wgOut->addHTML( $this->logLine( $logRows[$logid] ) );
 534                         $bitfields |= $logRows[$logid]->log_deleted;
 535                 }
 536                 if( !$logItems ) {
 537                         return $wgOut->showErrorPage( 'revdelete-nologid-title', 'revdelete-nologid-text' );
 538                 }
 539
 540                 $wgOut->addHTML( "</ul>" );
 541                 // Explanation text
 542                 $this->addUsageText();
 543                 // Normal sysops can always see what they did, but can't always change it
 544                 if( !$UserAllowed ) return;
 545
 546                 $items = array(
 547                         Xml::inputLabel( wfMsg( 'revdelete-log' ), 'wpReason', 'wpReason', 60 ),
 548                         Xml::submitButton( wfMsg( 'revdelete-submit' ) ) );
 549                 $hidden = array(
 550                         Xml::hidden( 'wpEditToken', $wgUser->editToken() ),
 551                         Xml::hidden( 'target', $this->page->getPrefixedDBKey() ),
 552                         Xml::hidden( 'page', $this->contextPage ? $this->contextPage->getPrefixedDBKey() : '' ),
 553                         Xml::hidden( 'type', $this->deleteKey ),
 554                         Xml::hidden( 'logid', implode(',',$this->logids) )
 555                 );
 556
 557                 $wgOut->addHTML(
 558                         Xml::openElement( 'form', array( 'method' => 'post',
 559                                 'action' => $this->getTitle()->getLocalUrl( 'action=submit' ), 'id' => 'mw-revdel-form-logs' ) ) .
 560                         Xml::fieldset( wfMsg( 'revdelete-legend' ) )
 561                 );
 562
 563                 $wgOut->addHTML( $this->buildCheckBoxes( $bitfields ) );
 564                 foreach( $items as $item ) {
 565                         $wgOut->addHTML( "<p>$item</p>" );
 566                 }
 567                 foreach( $hidden as $item ) {
 568                         $wgOut->addHTML( $item );
 569                 }
 570
 571                 $wgOut->addHTML(
 572                         Xml::closeElement( 'fieldset' ) .
 573                         Xml::closeElement( 'form' ) . "\n"
 574                 );
 575         }
 576
 577         private function addUsageText() {
 578                 global $wgOut, $wgUser;
 579                 $wgOut->addWikiMsg( 'revdelete-text' );
 580                 if( $wgUser->isAllowed( 'suppressrevision' ) ) {
 581                         $wgOut->addWikiMsg( 'revdelete-suppress-text' );
 582                 }
 583         }
 584
 585         /**
 586         * @param int $bitfields, aggregate bitfield of all the bitfields
 587         * @returns string HTML
 588         */
 589         private function buildCheckBoxes( $bitfields ) {
 590                 $html = '';
 591                 // FIXME: all items checked for just one rev are checked, even if not set for the others
 592                 foreach( $this->checks as $item ) {
 593                         list( $message, $name, $field ) = $item;
 594                         $line = Xml::tags( 'div', null, Xml::checkLabel( wfMsg($message), $name, $name,
 595                                 $bitfields & $field ) );
 596                         if( $field == Revision::DELETED_RESTRICTED ) $line = "<b>$line</b>";
 597                         $html .= $line;
 598                 }
 599                 return $html;
 600         }
 601
 602         /**
 603          * @param Revision $rev
 604          * @returns string
 605          */
 606         private function historyLine( $rev ) {
 607                 global $wgLang, $wgUser;
 608
 609                 $date = $wgLang->timeanddate( $rev->getTimestamp() );
 610                 $difflink = $del = '';
 611                 // Live revisions
 612                 if( $this->deleteKey == 'oldid' ) {
 613                         $tokenParams = '&unhide=1&token='.urlencode( $wgUser->editToken( $rev->getId() ) );
 614                         $revlink = $this->skin->makeLinkObj( $this->page, $date, 'oldid='.$rev->getId() . $tokenParams );
 615                         $difflink = '(' . $this->skin->makeKnownLinkObj( $this->page, wfMsgHtml('diff'),
 616                                 'diff=' . $rev->getId() . '&oldid=prev' . $tokenParams ) . ')';
 617                 // Archived revisions
 618                 } else {
 619                         $undelete = SpecialPage::getTitleFor( 'Undelete' );
 620                         $target = $this->page->getPrefixedText();
 621                         $revlink = $this->skin->makeLinkObj( $undelete, $date,
 622                                 "target=$target&timestamp=" . $rev->getTimestamp() );
 623                         $difflink = '(' . $this->skin->makeKnownLinkObj( $undelete, wfMsgHtml('diff'),
 624                                 "target=$target&diff=prev&timestamp=" . $rev->getTimestamp() ) . ')';
 625                 }
 626                 // Check permissions; items may be "suppressed"
 627                 if( $rev->isDeleted(Revision::DELETED_TEXT) ) {
 628                         $revlink = '<span class="history-deleted">'.$revlink.'</span>';
 629                         $del = ' <tt>' . wfMsgHtml( 'deletedrev' ) . '</tt>';
 630                         if( !$rev->userCan(Revision::DELETED_TEXT) ) {
 631                                 $revlink = '<span class="history-deleted">'.$date.'</span>';
 632                                 $difflink = '(' . wfMsgHtml('diff') . ')';
 633                         }
 634                 }
 635                 $userlink = $this->skin->revUserLink( $rev );
 636                 $comment = $this->skin->revComment( $rev );
 637
 638                 return "<li>$difflink $revlink $userlink $comment{$del}</li>";
 639         }
 640
 641         /**
 642          * @param File $file
 643          * @returns string
 644          */
 645         private function fileLine( $file ) {
 646                 global $wgLang;
 647
 648                 $target = $this->page->getPrefixedText();
 649                 $date = $wgLang->timeanddate( $file->getTimestamp(), true  );
 650
 651                 $del = '';
 652                 # Hidden files...
 653                 if( $file->isDeleted(File::DELETED_FILE) ) {
 654                         $del = ' <tt>' . wfMsgHtml( 'deletedrev' ) . '</tt>';
 655                         if( !$file->userCan(File::DELETED_FILE) ) {
 656                                 $pageLink = $date;
 657                         } else {
 658                                 $pageLink = $this->skin->makeKnownLinkObj( $this->getTitle(), $date,
 659                                         "target=$target&file=$file->sha1.".$file->getExtension() );
 660                         }
 661                         $pageLink = '<span class="history-deleted">' . $pageLink . '</span>';
 662                 # Regular files...
 663                 } else {
 664                         $url = $file->getUrlRel();
 665                         $pageLink = "<a href=\"{$url}\">{$date}</a>";
 666                 }
 667
 668                 $data = wfMsg( 'widthheight', $wgLang->formatNum( $file->getWidth() ),
 669                         $wgLang->formatNum( $file->getHeight() ) ) .
 670                         ' (' . wfMsgExt( 'nbytes', 'parsemag', $wgLang->formatNum( $file->getSize() ) ) . ')';
 671                 $data = htmlspecialchars( $data );
 672
 673                 return "<li>$pageLink ".$this->fileUserTools( $file )." $data ".
 674                         $this->fileComment( $file )."$del</li>";
 675         }
 676
 677         /**
 678          * @param ArchivedFile $file
 679          * @returns string
 680          */
 681         private function archivedfileLine( $file ) {
 682                 global $wgLang;
 683
 684                 $target = $this->page->getPrefixedText();
 685                 $date = $wgLang->timeanddate( $file->getTimestamp(), true  );
 686
 687                 $undelete = SpecialPage::getTitleFor( 'Undelete' );
 688                 $pageLink = $this->skin->makeKnownLinkObj( $undelete, $date,
 689                         "target=$target&file={$file->getKey()}" );
 690
 691                 $del = '';
 692                 if( $file->isDeleted(File::DELETED_FILE) ) {
 693                         $del = ' <tt>' . wfMsgHtml( 'deletedrev' ) . '</tt>';
 694                 }
 695
 696                 $data = wfMsg( 'widthheight', $wgLang->formatNum( $file->getWidth() ),
 697                         $wgLang->formatNum( $file->getHeight() ) ) .
 698                         ' (' . wfMsgExt( 'nbytes', 'parsemag', $wgLang->formatNum( $file->getSize() ) ) . ')';
 699                 $data = htmlspecialchars( $data );
 700
 701                 return "<li>$pageLink ".$this->fileUserTools( $file )." $data ".
 702                         $this->fileComment( $file )."$del</li>";
 703         }
 704
 705         /**
 706          * @param Array $row row
 707          * @returns string
 708          */
 709         private function logLine( $row ) {
 710                 global $wgLang;
 711
 712                 $date = $wgLang->timeanddate( $row->log_timestamp );
 713                 $paramArray = LogPage::extractParams( $row->log_params );
 714                 $title = Title::makeTitle( $row->log_namespace, $row->log_title );
 715
 716                 $logtitle = SpecialPage::getTitleFor( 'Log' );
 717                 $loglink = $this->skin->makeKnownLinkObj( $logtitle, wfMsgHtml( 'log' ),
 718                         wfArrayToCGI( array( 'page' => $title->getPrefixedUrl() ) ) );
 719                 // Action text
 720                 if( !LogEventsList::userCan($row,LogPage::DELETED_ACTION) ) {
 721                         $action = '<span class="history-deleted">' . wfMsgHtml('rev-deleted-event') . '</span>';
 722                 } else {
 723                         $action = LogPage::actionText( $row->log_type, $row->log_action, $title,
 724                                 $this->skin, $paramArray, true, true );
 725                         if( $row->log_deleted & LogPage::DELETED_ACTION )
 726                                 $action = '<span class="history-deleted">' . $action . '</span>';
 727                 }
 728                 // User links
 729                 $userLink = $this->skin->userLink( $row->log_user, User::WhoIs($row->log_user) );
 730                 if( LogEventsList::isDeleted($row,LogPage::DELETED_USER) ) {
 731                         $userLink = '<span class="history-deleted">' . $userLink . '</span>';
 732                 }
 733                 // Comment
 734                 $comment = $wgLang->getDirMark() . $this->skin->commentBlock( $row->log_comment );
 735                 if( LogEventsList::isDeleted($row,LogPage::DELETED_COMMENT) ) {
 736                         $comment = '<span class="history-deleted">' . $comment . '</span>';
 737                 }
 738                 return "<li>($loglink) $date $userLink $action $comment</li>";
 739         }
 740
 741         /**
 742          * Generate a user tool link cluster if the current user is allowed to view it
 743          * @param ArchivedFile $file
 744          * @return string HTML
 745          */
 746         private function fileUserTools( $file ) {
 747                 if( $file->userCan( Revision::DELETED_USER ) ) {
 748                         $link = $this->skin->userLink( $file->user, $file->user_text ) .
 749                                 $this->skin->userToolLinks( $file->user, $file->user_text );
 750                 } else {
 751                         $link = wfMsgHtml( 'rev-deleted-user' );
 752                 }
 753                 if( $file->isDeleted( Revision::DELETED_USER ) ) {
 754                         return '<span class="history-deleted">' . $link . '</span>';
 755                 }
 756                 return $link;
 757         }
 758
 759         /**
 760          * Wrap and format the given file's comment block, if the current
 761          * user is allowed to view it.
 762          *
 763          * @param ArchivedFile $file
 764          * @return string HTML
 765          */
 766         private function fileComment( $file ) {
 767                 if( $file->userCan( File::DELETED_COMMENT ) ) {
 768                         $block = $this->skin->commentBlock( $file->description );
 769                 } else {
 770                         $block = ' ' . wfMsgHtml( 'rev-deleted-comment' );
 771                 }
 772                 if( $file->isDeleted( File::DELETED_COMMENT ) ) {
 773                         return "<span class=\"history-deleted\">$block</span>";
 774                 }
 775                 return $block;
 776         }
 777
 778         /**
 779          * @param WebRequest $request
 780          */
 781         private function submit( $request ) {
 782                 global $wgUser, $wgOut;
 783                 # Check edit token on submission
 784                 if( $this->wasPosted && !$wgUser->matchEditToken( $request->getVal('wpEditToken') ) ) {
 785                         $wgOut->addWikiMsg( 'sessionfailure' );
 786                         return false;
 787                 }
 788                 $bitfield = $this->extractBitfield( $request );
 789                 $comment = $request->getText( 'wpReason' );
 790                 # Can the user set this field?
 791                 if( $bitfield & Revision::DELETED_RESTRICTED && !$wgUser->isAllowed('suppressrevision') ) {
 792                         $wgOut->permissionRequired( 'suppressrevision' );
 793                         return false;
 794                 }
 795                 # If the save went through, go to success message...
 796                 if( $this->save( $bitfield, $comment, $this->page ) ) {
 797                         $this->success();
 798                         return true;
 799                 # ...otherwise, bounce back to form...
 800                 } else {
 801                         $this->failure();
 802                 }
 803                 return false;
 804         }
 805
 806         private function success() {
 807                 global $wgOut;
 808                 $wgOut->setPagetitle( wfMsg( 'actioncomplete' ) );
 809                 $wrap = '<span class="success">$1</span>';
 810                 if( $this->deleteKey == 'logid' ) {
 811                         $wgOut->wrapWikiMsg( $wrap, 'logdelete-success' );
 812                         $this->showLogItems();
 813                 } else if( $this->deleteKey == 'oldid' || $this->deleteKey == 'artimestamp' ) {
 814                         $wgOut->wrapWikiMsg( $wrap, 'revdelete-success' );
 815                         $this->showRevs();
 816                 } else if( $this->deleteKey == 'fileid' ) {
 817                         $wgOut->wrapWikiMsg( $wrap, 'revdelete-success' );
 818                         $this->showImages();
 819                 } else if( $this->deleteKey == 'oldimage' ) {
 820                         $wgOut->wrapWikiMsg( $wrap, 'revdelete-success' );
 821                         $this->showImages();
 822                 }
 823         }
 824
 825         private function failure() {
 826                 global $wgOut;
 827                 $wgOut->setPagetitle( wfMsg( 'actioncomplete' ) );
 828                 $wrap = '<span class="error">$1</span>';
 829                 if( $this->deleteKey == 'logid' ) {
 830                         $this->showLogItems();
 831                 } else if( $this->deleteKey == 'oldid' || $this->deleteKey == 'artimestamp' ) {
 832                         $wgOut->wrapWikiMsg( $wrap, 'revdelete-failure' );
 833                         $this->showRevs();
 834                 } else if( $this->deleteKey == 'fileid' ) {
 835                         $wgOut->wrapWikiMsg( $wrap, 'revdelete-failure' );
 836                         $this->showImages();
 837                 } else if( $this->deleteKey == 'oldimage' ) {
 838                         $wgOut->wrapWikiMsg( $wrap, 'revdelete-failure' );
 839                         $this->showImages();
 840                 }
 841         }
 842
 843         /**
 844          * Put together a rev_deleted bitfield from the submitted checkboxes
 845          * @param WebRequest $request
 846          * @return int
 847          */
 848         private function extractBitfield( $request ) {
 849                 $bitfield = 0;
 850                 foreach( $this->checks as $item ) {
 851                         list( /* message */ , $name, $field ) = $item;
 852                         if( $request->getCheck( $name ) ) {
 853                                 $bitfield |= $field;
 854                         }
 855                 }
 856                 return $bitfield;
 857         }
 858
 859         private function save( $bitfield, $reason, $title ) {
 860                 $dbw = wfGetDB( DB_MASTER );
 861                 // Don't allow simply locking the interface for no reason
 862                 if( $bitfield == Revision::DELETED_RESTRICTED ) {
 863                         $bitfield = 0;
 864                 }
 865                 $deleter = new RevisionDeleter( $dbw );
 866                 // By this point, only one of the below should be set
 867                 if( isset($this->revisions) ) {
 868                         return $deleter->setRevVisibility( $title, $this->revisions, $bitfield, $reason );
 869                 } else if( isset($this->archrevs) ) {
 870                         return $deleter->setArchiveVisibility( $title, $this->archrevs, $bitfield, $reason );
 871                 } else if( isset($this->ofiles) ) {
 872                         return $deleter->setOldImgVisibility( $title, $this->ofiles, $bitfield, $reason );
 873                 } else if( isset($this->afiles) ) {
 874                         return $deleter->setArchFileVisibility( $title, $this->afiles, $bitfield, $reason );
 875                 } else if( isset($this->events) ) {
 876                         return $deleter->setEventVisibility( $title, $this->events, $bitfield, $reason );
 877                 }
 878                 return false;
 879         }
 880 }
 881
 882 /**
 883  * Implements the actions for Revision Deletion.
 884  * @ingroup SpecialPage
 885  */
 886 class RevisionDeleter {
 887         function __construct( $db ) {
 888                 $this->dbw = $db;
 889         }
 890
 891         /**
 892          * @param $title, the page these events apply to
 893          * @param array $items list of revision ID numbers
 894          * @param int $bitfield new rev_deleted value
 895          * @param string $comment Comment for log records
 896          */
 897         function setRevVisibility( $title, $items, $bitfield, $comment ) {
 898                 global $wgOut;
 899
 900                 $userAllowedAll = $success = true;
 901                 $revIDs = array();
 902                 $revCount = 0;
 903                 // Run through and pull all our data in one query
 904                 foreach( $items as $revid ) {
 905                         $where[] = intval($revid);
 906                 }
 907                 $result = $this->dbw->select( array('revision','page'), '*',
 908                         array( 'rev_page' => $title->getArticleID(),
 909                                 'rev_id' => $where, 'rev_page = page_id' ),
 910                         __METHOD__
 911                 );
 912                 while( $row = $this->dbw->fetchObject( $result ) ) {
 913                         $revObjs[$row->rev_id] = new Revision( $row );
 914                 }
 915                 // To work!
 916                 foreach( $items as $revid ) {
 917                         if( !isset($revObjs[$revid]) ) {
 918                                 $success = false;
 919                                 continue; // Must exist
 920                         } else if( $revObjs[$revid]->isCurrent() && ($bitfield & Revision::DELETED_TEXT) ) {
 921                                 $success = false;
 922                                 continue; // Cannot hide current version text
 923                         } else if( !$revObjs[$revid]->userCan(Revision::DELETED_RESTRICTED) ) {
 924                         $userAllowedAll = false;
 925                                 continue;
 926                         }
 927                         // For logging, maintain a count of revisions
 928                         if( $revObjs[$revid]->mDeleted != $bitfield ) {
 929                                 $revIDs[] = $revid;
 930                                 $this->updateRevision( $revObjs[$revid], $bitfield );
 931                                 $this->updateRecentChangesEdits( $revObjs[$revid], $bitfield, false );
 932                                 $revCount++;
 933                         }
 934                 }
 935                 // Clear caches...
 936                 // Don't log or touch if nothing changed
 937                 if( $revCount > 0 ) {
 938                         $this->updateLog( $title, $revCount, $bitfield, $revObjs[$revid]->mDeleted,
 939                                 $comment, $title, 'oldid', $revIDs );
 940                         $this->updatePage( $title );
 941                 }
 942                 // Where all revs allowed to be set?
 943                 if( !$userAllowedAll ) {
 944                         //FIXME: still might be confusing???
 945                         $wgOut->permissionRequired( 'suppressrevision' );
 946                         return false;
 947                 }
 948
 949                 return $success;
 950         }
 951
 952          /**
 953          * @param $title, the page these events apply to
 954          * @param array $items list of revision ID numbers
 955          * @param int $bitfield new rev_deleted value
 956          * @param string $comment Comment for log records
 957          */
 958         function setArchiveVisibility( $title, $items, $bitfield, $comment ) {
 959                 global $wgOut;
 960
 961                 $userAllowedAll = $success = true;
 962                 $count = 0;
 963                 $Id_set = array();
 964                 // Run through and pull all our data in one query
 965                 foreach( $items as $timestamp ) {
 966                         $where[] = $this->dbw->timestamp( $timestamp );
 967                 }
 968                 $result = $this->dbw->select( 'archive', '*',
 969                         array(
 970                                 'ar_namespace' => $title->getNamespace(),
 971                                 'ar_title' => $title->getDBKey(),
 972                                 'ar_timestamp' => $where
 973                         ), __METHOD__
 974                 );
 975                 while( $row = $this->dbw->fetchObject( $result ) ) {
 976                         $timestamp = wfTimestamp( TS_MW, $row->ar_timestamp );
 977                         $revObjs[$timestamp] = new Revision( array(
 978                                 'page'       => $title->getArticleId(),
 979                                 'id'         => $row->ar_rev_id,
 980                                 'text'       => $row->ar_text_id,
 981                                 'comment'    => $row->ar_comment,
 982                                 'user'       => $row->ar_user,
 983                                 'user_text'  => $row->ar_user_text,
 984                                 'timestamp'  => $timestamp,
 985                                 'minor_edit' => $row->ar_minor_edit,
 986                                 'text_id'    => $row->ar_text_id,
 987                                 'deleted'    => $row->ar_deleted,
 988                                 'len'        => $row->ar_len) );
 989                 }
 990                 // To work!
 991                 foreach( $items as $timestamp ) {
 992                         // This will only select the first revision with this timestamp.
 993                         // Since they are all selected/deleted at once, we can just check the
 994                         // permissions of one. UPDATE is done via timestamp, so all revs are set.
 995                         if( !is_object($revObjs[$timestamp]) ) {
 996                                 $success = false;
 997                                 continue; // Must exist
 998                         } else if( !$revObjs[$timestamp]->userCan(Revision::DELETED_RESTRICTED) ) {
 999                         $userAllowedAll=false;
1000                                 continue;
1001                         }
1002                         // Which revisions did we change anything about?
1003                         if( $revObjs[$timestamp]->mDeleted != $bitfield ) {
1004                                 $Id_set[] = $timestamp;
1005                                 $this->updateArchive( $revObjs[$timestamp], $title, $bitfield );
1006                             $count++;
1007                         }
1008                 }
1009                 // For logging, maintain a count of revisions
1010                 if( $count > 0 ) {
1011                         $this->updateLog( $title, $count, $bitfield, $revObjs[$timestamp]->mDeleted,
1012                                 $comment, $title, 'artimestamp', $Id_set );
1013                 }
1014                 // Where all revs allowed to be set?
1015                 if( !$userAllowedAll ) {
1016                         $wgOut->permissionRequired( 'suppressrevision' );
1017                         return false;
1018                 }
1019
1020                 return $success;
1021         }
1022
1023          /**
1024          * @param $title, the page these events apply to
1025          * @param array $items list of revision ID numbers
1026          * @param int $bitfield new rev_deleted value
1027          * @param string $comment Comment for log records
1028          */
1029         function setOldImgVisibility( $title, $items, $bitfield, $comment ) {
1030                 global $wgOut;
1031
1032                 $userAllowedAll = $success = true;
1033                 $count = 0;
1034                 $set = array();
1035                 // Run through and pull all our data in one query
1036                 foreach( $items as $timestamp ) {
1037                         $where[] = $timestamp.'!'.$title->getDBKey();
1038                 }
1039                 $result = $this->dbw->select( 'oldimage', '*',
1040                         array( 'oi_name' => $title->getDBKey(), 'oi_archive_name' => $where ),
1041                         __METHOD__
1042                 );
1043                 while( $row = $this->dbw->fetchObject( $result ) ) {
1044                         $filesObjs[$row->oi_archive_name] = RepoGroup::singleton()->getLocalRepo()->newFileFromRow( $row );
1045                         $filesObjs[$row->oi_archive_name]->user = $row->oi_user;
1046                         $filesObjs[$row->oi_archive_name]->user_text = $row->oi_user_text;
1047                 }
1048                 // To work!
1049                 foreach( $items as $timestamp ) {
1050                         $archivename = $timestamp.'!'.$title->getDBKey();
1051                         if( !isset($filesObjs[$archivename]) ) {
1052                                 $success = false;
1053                                 continue; // Must exist
1054                         } else if( !$filesObjs[$archivename]->userCan(File::DELETED_RESTRICTED) ) {
1055                         $userAllowedAll=false;
1056                                 continue;
1057                         }
1058
1059                         $transaction = true;
1060                         // Which revisions did we change anything about?
1061                         if( $filesObjs[$archivename]->deleted != $bitfield ) {
1062                                 $count++;
1063
1064                                 $this->dbw->begin();
1065                                 $this->updateOldFiles( $filesObjs[$archivename], $bitfield );
1066                                 // If this image is currently hidden...
1067                                 if( $filesObjs[$archivename]->deleted & File::DELETED_FILE ) {
1068                                         if( $bitfield & File::DELETED_FILE ) {
1069                                                 # Leave it alone if we are not changing this...
1070                                                 $set[]=$timestamp;
1071                                                 $transaction = true;
1072                                         } else {
1073                                                 # We are moving this out
1074                                                 $transaction = $this->makeOldImagePublic( $filesObjs[$archivename] );
1075                                                 $set[]=$transaction;
1076                                         }
1077                                 // Is it just now becoming hidden?
1078                                 } else if( $bitfield & File::DELETED_FILE ) {
1079                                         $transaction = $this->makeOldImagePrivate( $filesObjs[$archivename] );
1080                                         $set[]=$transaction;
1081                                 } else {
1082                                         $set[]=$timestamp;
1083                                 }
1084                                 // If our file operations fail, then revert back the db
1085                                 if( $transaction==false ) {
1086                                         $this->dbw->rollback();
1087                                         return false;
1088                                 }
1089                                 $this->dbw->commit();
1090                         }
1091                 }
1092
1093                 // Log if something was changed
1094                 if( $count > 0 ) {
1095                         $this->updateLog( $title, $count, $bitfield, $filesObjs[$archivename]->deleted,
1096                                 $comment, $title, 'oldimage', $set );
1097                         # Purge page/history
1098                         $file = wfLocalFile( $title );
1099                         $file->purgeCache();
1100                         $file->purgeHistory();
1101                         # Invalidate cache for all pages using this file
1102                         $update = new HTMLCacheUpdate( $title, 'imagelinks' );
1103                         $update->doUpdate();
1104                 }
1105                 // Where all revs allowed to be set?
1106                 if( !$userAllowedAll ) {
1107                         $wgOut->permissionRequired( 'suppressrevision' );
1108                         return false;
1109                 }
1110
1111                 return $success;
1112         }
1113
1114          /**
1115          * @param $title, the page these events apply to
1116          * @param array $items list of revision ID numbers
1117          * @param int $bitfield new rev_deleted value
1118          * @param string $comment Comment for log records
1119          */
1120         function setArchFileVisibility( $title, $items, $bitfield, $comment ) {
1121                 global $wgOut;
1122
1123                 $userAllowedAll = $success = true;
1124                 $count = 0;
1125                 $Id_set = array();
1126
1127                 // Run through and pull all our data in one query
1128                 foreach( $items as $id ) {
1129                         $where[] = intval($id);
1130                 }
1131                 $result = $this->dbw->select( 'filearchive', '*',
1132                         array( 'fa_name' => $title->getDBKey(),
1133                                 'fa_id' => $where ),
1134                         __METHOD__ );
1135                 while( $row = $this->dbw->fetchObject( $result ) ) {
1136                         $filesObjs[$row->fa_id] = ArchivedFile::newFromRow( $row );
1137                 }
1138                 // To work!
1139                 foreach( $items as $fileid ) {
1140                         if( !isset($filesObjs[$fileid]) ) {
1141                                 $success = false;
1142                                 continue; // Must exist
1143                         } else if( !$filesObjs[$fileid]->userCan(File::DELETED_RESTRICTED) ) {
1144                         $userAllowedAll=false;
1145                                 continue;
1146                         }
1147                         // Which revisions did we change anything about?
1148                         if( $filesObjs[$fileid]->deleted != $bitfield ) {
1149                            $Id_set[]=$fileid;
1150                            $count++;
1151
1152                            $this->updateArchFiles( $filesObjs[$fileid], $bitfield );
1153                         }
1154                 }
1155                 // Log if something was changed
1156                 if( $count > 0 ) {
1157                         $this->updateLog( $title, $count, $bitfield, $comment,
1158                                 $filesObjs[$fileid]->deleted, $title, 'fileid', $Id_set );
1159                 }
1160                 // Where all revs allowed to be set?
1161                 if( !$userAllowedAll ) {
1162                         $wgOut->permissionRequired( 'suppressrevision' );
1163                         return false;
1164                 }
1165
1166                 return $success;
1167         }
1168
1169         /**
1170          * @param $title, the log page these events apply to
1171          * @param array $items list of log ID numbers
1172          * @param int $bitfield new log_deleted value
1173          * @param string $comment Comment for log records
1174          */
1175         function setEventVisibility( $title, $items, $bitfield, $comment ) {
1176                 global $wgOut;
1177
1178                 $userAllowedAll = $success = true;
1179                 $count = 0;
1180                 $log_Ids = array();
1181
1182                 // Run through and pull all our data in one query
1183                 foreach( $items as $logid ) {
1184                         $where[] = intval($logid);
1185                 }
1186                 list($log,$logtype) = explode( '/',$title->getDBKey(), 2 );
1187                 $result = $this->dbw->select( 'logging', '*',
1188                         array( 'log_type' => $logtype, 'log_id' => $where ),
1189                         __METHOD__
1190                 );
1191                 while( $row = $this->dbw->fetchObject( $result ) ) {
1192                         $logRows[$row->log_id] = $row;
1193                 }
1194                 // To work!
1195                 foreach( $items as $logid ) {
1196                         if( !isset($logRows[$logid]) ) {
1197                                 $success = false;
1198                                 continue; // Must exist
1199                         } else if( !LogEventsList::userCan($logRows[$logid], LogPage::DELETED_RESTRICTED)
1200                                 || $logRows[$logid]->log_type == 'suppress' )
1201                         {
1202                         $userAllowedAll=false; // Don't hide from oversight log!!!
1203                         continue;
1204                         }
1205                         // Which logs did we change anything about?
1206                         if( $logRows[$logid]->log_deleted != $bitfield ) {
1207                                 $log_Ids[] = $logid;
1208                                 $this->updateLogs( $logRows[$logid], $bitfield );
1209                                 $this->updateRecentChangesLog( $logRows[$logid], $bitfield );
1210                                 $count++;
1211                         }
1212                 }
1213                 // Don't log or touch if nothing changed
1214                 if( $count > 0 ) {
1215                         $this->updateLog( $title, $count, $bitfield, $logRows[$logid]->log_deleted,
1216                                 $comment, $title, 'logid', $log_Ids );
1217                 }
1218                 // Were all revs allowed to be set?
1219                 if( !$userAllowedAll ) {
1220                         $wgOut->permissionRequired( 'suppressrevision' );
1221                         return false;
1222                 }
1223
1224                 return $success;
1225         }
1226
1227         /**
1228          * Moves an image to a safe private location
1229          * Caller is responsible for clearing caches
1230          * @param File $oimage
1231          * @returns mixed, timestamp string on success, false on failure
1232          */
1233         function makeOldImagePrivate( $oimage ) {
1234                 $transaction = new FSTransaction();
1235                 if( !FileStore::lock() ) {
1236                         wfDebug( __METHOD__.": failed to acquire file store lock, aborting\n" );
1237                         return false;
1238                 }
1239                 $oldpath = $oimage->getArchivePath() . DIRECTORY_SEPARATOR . $oimage->archive_name;
1240                 // Dupe the file into the file store
1241                 if( file_exists( $oldpath ) ) {
1242                         // Is our directory configured?
1243                         if( $store = FileStore::get( 'deleted' ) ) {
1244                                 if( !$oimage->sha1 ) {
1245                                         $oimage->upgradeRow(); // sha1 may be missing
1246                                 }
1247                                 $key = $oimage->sha1 . '.' . $oimage->getExtension();
1248                                 $transaction->add( $store->insert( $key, $oldpath, FileStore::DELETE_ORIGINAL ) );
1249                         } else {
1250                                 $group = null;
1251                                 $key = null;
1252                                 $transaction = false; // Return an error and do nothing
1253                         }
1254                 } else {
1255                         wfDebug( __METHOD__." deleting already-missing '$oldpath'; moving on to database\n" );
1256                         $group = null;
1257                         $key = '';
1258                         $transaction = new FSTransaction(); // empty
1259                 }
1260
1261                 if( $transaction === false ) {
1262                         // Fail to restore?
1263                         wfDebug( __METHOD__.": import to file store failed, aborting\n" );
1264                         throw new MWException( "Could not archive and delete file $oldpath" );
1265                         return false;
1266                 }
1267
1268                 wfDebug( __METHOD__.": set db items, applying file transactions\n" );
1269                 $transaction->commit();
1270                 FileStore::unlock();
1271
1272                 $m = explode('!',$oimage->archive_name,2);
1273                 $timestamp = $m[0];
1274
1275                 return $timestamp;
1276         }
1277
1278         /**
1279          * Moves an image from a safe private location
1280          * Caller is responsible for clearing caches
1281          * @param File $oimage
1282          * @returns mixed, string timestamp on success, false on failure
1283          */
1284         function makeOldImagePublic( $oimage ) {
1285                 $transaction = new FSTransaction();
1286                 if( !FileStore::lock() ) {
1287                         wfDebug( __METHOD__." could not acquire filestore lock\n" );
1288                         return false;
1289                 }
1290
1291                 $store = FileStore::get( 'deleted' );
1292                 if( !$store ) {
1293                         wfDebug( __METHOD__.": skipping row with no file.\n" );
1294                         return false;
1295                 }
1296
1297                 $key = $oimage->sha1.'.'.$oimage->getExtension();
1298                 $destDir = $oimage->getArchivePath();
1299                 if( !is_dir( $destDir ) ) {
1300                         wfMkdirParents( $destDir );
1301                 }
1302                 $destPath = $destDir . DIRECTORY_SEPARATOR . $oimage->archive_name;
1303                 // Check if any other stored revisions use this file;
1304                 // if so, we shouldn't remove the file from the hidden
1305                 // archives so they will still work. Check hidden files first.
1306                 $useCount = $this->dbw->selectField( 'oldimage', '1',
1307                         array( 'oi_sha1' => $oimage->sha1,
1308                                 'oi_deleted & '.File::DELETED_FILE => File::DELETED_FILE ),
1309                         __METHOD__, array( 'FOR UPDATE' ) );
1310                 // Check the rest of the deleted archives too.
1311                 // (these are the ones that don't show in the image history)
1312                 if( !$useCount ) {
1313                         $useCount = $this->dbw->selectField( 'filearchive', '1',
1314                                 array( 'fa_storage_group' => 'deleted', 'fa_storage_key' => $key ),
1315                                 __METHOD__, array( 'FOR UPDATE' ) );
1316                 }
1317
1318                 if( $useCount == 0 ) {
1319                         wfDebug( __METHOD__.": nothing else using {$oimage->sha1}, will deleting after\n" );
1320                         $flags = FileStore::DELETE_ORIGINAL;
1321                 } else {
1322                         $flags = 0;
1323                 }
1324                 $transaction->add( $store->export( $key, $destPath, $flags ) );
1325
1326                 wfDebug( __METHOD__.": set db items, applying file transactions\n" );
1327                 $transaction->commit();
1328                 FileStore::unlock();
1329
1330                 $m = explode('!',$oimage->archive_name,2);
1331                 $timestamp = $m[0];
1332
1333                 return $timestamp;
1334         }
1335
1336         /**
1337          * Update the revision's rev_deleted field
1338          * @param Revision $rev
1339          * @param int $bitfield new rev_deleted bitfield value
1340          */
1341         function updateRevision( $rev, $bitfield ) {
1342                 $this->dbw->update( 'revision',
1343                         array( 'rev_deleted' => $bitfield ),
1344                         array( 'rev_id' => $rev->getId(), 'rev_page' => $rev->getPage() ),
1345                         __METHOD__
1346                 );
1347         }
1348
1349         /**
1350          * Update the revision's rev_deleted field
1351          * @param Revision $rev
1352          * @param Title $title
1353          * @param int $bitfield new rev_deleted bitfield value
1354          */
1355         function updateArchive( $rev, $title, $bitfield ) {
1356                 $this->dbw->update( 'archive',
1357                         array( 'ar_deleted' => $bitfield ),
1358                         array( 'ar_namespace' => $title->getNamespace(),
1359                                 'ar_title'     => $title->getDBKey(),
1360                                 // use timestamp for index
1361                                 'ar_timestamp' => $this->dbw->timestamp( $rev->getTimestamp() ),
1362                                 'ar_rev_id'    => $rev->getId()
1363                         ),
1364                         __METHOD__ );
1365         }
1366
1367         /**
1368          * Update the images's oi_deleted field
1369          * @param File $file
1370          * @param int $bitfield new rev_deleted bitfield value
1371          */
1372         function updateOldFiles( $file, $bitfield ) {
1373                 $this->dbw->update( 'oldimage',
1374                         array( 'oi_deleted' => $bitfield ),
1375                         array( 'oi_name' => $file->getName(),
1376                                 'oi_timestamp' => $this->dbw->timestamp( $file->getTimestamp() ) ),
1377                         __METHOD__
1378                 );
1379         }
1380
1381         /**
1382          * Update the images's fa_deleted field
1383          * @param ArchivedFile $file
1384          * @param int $bitfield new rev_deleted bitfield value
1385          */
1386         function updateArchFiles( $file, $bitfield ) {
1387                 $this->dbw->update( 'filearchive',
1388                         array( 'fa_deleted' => $bitfield ),
1389                         array( 'fa_id' => $file->getId() ),
1390                         __METHOD__
1391                 );
1392         }
1393
1394         /**
1395          * Update the logging log_deleted field
1396          * @param Row $row
1397          * @param int $bitfield new rev_deleted bitfield value
1398          */
1399         function updateLogs( $row, $bitfield ) {
1400                 $this->dbw->update( 'logging',
1401                         array( 'log_deleted' => $bitfield ),
1402                         array( 'log_id' => $row->log_id ),
1403                         __METHOD__
1404                 );
1405         }
1406
1407         /**
1408          * Update the revision's recentchanges record if fields have been hidden
1409          * @param Revision $rev
1410          * @param int $bitfield new rev_deleted bitfield value
1411          */
1412         function updateRecentChangesEdits( $rev, $bitfield ) {
1413                 $this->dbw->update( 'recentchanges',
1414                         array( 'rc_deleted' => $bitfield,
1415                                    'rc_patrolled' => 1 ),
1416                         array( 'rc_this_oldid' => $rev->getId(),
1417                                 'rc_timestamp' => $this->dbw->timestamp( $rev->getTimestamp() ) ),
1418                         __METHOD__
1419                 );
1420         }
1421
1422         /**
1423          * Update the revision's recentchanges record if fields have been hidden
1424          * @param Row $row
1425          * @param int $bitfield new rev_deleted bitfield value
1426          */
1427         function updateRecentChangesLog( $row, $bitfield ) {
1428                 $this->dbw->update( 'recentchanges',
1429                         array( 'rc_deleted' => $bitfield,
1430                                    'rc_patrolled' => 1 ),
1431                         array( 'rc_logid' => $row->log_id,
1432                                 'rc_timestamp' => $row->log_timestamp ),
1433                         __METHOD__
1434                 );
1435         }
1436
1437         /**
1438          * Touch the page's cache invalidation timestamp; this forces cached
1439          * history views to refresh, so any newly hidden or shown fields will
1440          * update properly.
1441          * @param Title $title
1442          */
1443         function updatePage( $title ) {
1444                 $title->invalidateCache();
1445                 $this->dbw->commit(); // Commit the transaction before the purge is sent
1446                 $title->purgeSquid();
1447                 $title->touchLinks();
1448                 // Extensions that require referencing previous revisions may need this
1449                 wfRunHooks( 'ArticleRevisionVisiblitySet', array( &$title ) );
1450         }
1451
1452         /**
1453          * Checks for a change in the bitfield for a certain option and updates the
1454          * provided array accordingly.
1455          *
1456          * @param String $desc Description to add to the array if the option was
1457          * enabled / disabled.
1458          * @param int $field The bitmask describing the single option.
1459          * @param int $diff The xor of the old and new bitfields.
1460          * @param array $arr The array to update.
1461          */
1462         protected static function checkItem( $desc, $field, $diff, $new, &$arr ) {
1463                 if( $diff & $field ) {
1464                         $arr[ ( $new & $field ) ? 0 : 1 ][] = $desc;
1465                 }
1466         }
1467
1468         /**
1469          * Gets an array describing the changes made to the visibilit of the revision.
1470          * If the resulting array is $arr, then $arr[0] will contain an array of strings
1471          * describing the items that were hidden, $arr[2] will contain an array of strings
1472          * describing the items that were unhidden, and $arr[3] will contain an array with
1473          * a single string, which can be one of "applied restrictions to sysops",
1474          * "removed restrictions from sysops", or null.
1475          *
1476          * @param int $n The new bitfield.
1477          * @param int $o The old bitfield.
1478          * @return An array as described above.
1479          */
1480         protected static function getChanges( $n, $o ) {
1481                 $diff = $n ^ $o;
1482                 $ret = array( 0 => array(), 1 => array(), 2 => array() );
1483                 // Build bitfield changes in language
1484                 self::checkItem( wfMsgForContent( 'revdelete-content' ),
1485                         Revision::DELETED_TEXT, $diff, $n, $ret );
1486                 self::checkItem( wfMsgForContent( 'revdelete-summary' ),
1487                         Revision::DELETED_COMMENT, $diff, $n, $ret );
1488                 self::checkItem( wfMsgForContent( 'revdelete-uname' ),
1489                         Revision::DELETED_USER, $diff, $n, $ret );
1490                 // Restriction application to sysops
1491                 if( $diff & Revision::DELETED_RESTRICTED ) {
1492                         if( $n & Revision::DELETED_RESTRICTED )
1493                                 $ret[2][] = wfMsgForContent( 'revdelete-restricted' );
1494                         else
1495                                 $ret[2][] = wfMsgForContent( 'revdelete-unrestricted' );
1496                 }
1497                 return $ret;
1498         }
1499
1500         /**
1501          * Gets a log message to describe the given revision visibility change. This
1502          * message will be of the form "[hid {content, edit summary, username}];
1503          * [unhid {...}][applied restrictions to sysops] for $count revisions: $comment".
1504          *
1505          * @param int $count The number of effected revisions.
1506          * @param int $nbitfield The new bitfield for the revision.
1507          * @param int $obitfield The old bitfield for the revision.
1508          * @param bool $isForLog
1509          */
1510         public static function getLogMessage( $count, $nbitfield, $obitfield, $isForLog = false ) {
1511                 global $wgLang;
1512                 $s = '';
1513                 $changes = self::getChanges( $nbitfield, $obitfield );
1514                 if( count( $changes[0] ) ) {
1515                         $s .= wfMsgForContent( 'revdelete-hid', implode( ', ', $changes[0] ) );
1516                 }
1517                 if( count( $changes[1] ) ) {
1518                         if ($s) $s .= '; ';
1519                         $s .= wfMsgForContent( 'revdelete-unhid', implode( ', ', $changes[1] ) );
1520                 }
1521                 if( count( $changes[2] ) ) {
1522                         $s .= $s ? ' (' . $changes[2][0] . ')' : $changes[2][0];
1523                 }
1524                 $msg = $isForLog ? 'logdelete-log-message' : 'revdelete-log-message';
1525                 return wfMsgExt( $msg, array( 'parsemag', 'content' ), $s, $wgLang->formatNum($count) );
1526
1527         }
1528
1529         /**
1530          * Record a log entry on the action
1531          * @param Title $title, page where item was removed from
1532          * @param int $count the number of revisions altered for this page
1533          * @param int $nbitfield the new _deleted value
1534          * @param int $obitfield the old _deleted value
1535          * @param string $comment
1536          * @param Title $target, the relevant page
1537          * @param string $param, URL param
1538          * @param Array $items
1539          */
1540         function updateLog( $title, $count, $nbitfield, $obitfield, $comment, $target,
1541                 $param, $items = array() )
1542         {
1543                 // Put things hidden from sysops in the oversight log
1544                 $logtype = ( ($nbitfield | $obitfield) & Revision::DELETED_RESTRICTED ) ?
1545                         'suppress' : 'delete';
1546                 $log = new LogPage( $logtype );
1547                 $itemCSV = implode(',',$items);
1548
1549                 if( $param == 'logid' ) {
1550                         $params = array( $itemCSV, "ofield={$obitfield}", "nfield={$nbitfield}" );
1551                         $log->addEntry( 'event', $title, $comment, $params );
1552                 } else {
1553                         // Add params for effected page and ids
1554                         $params = array( $param, $itemCSV, "ofield={$obitfield}", "nfield={$nbitfield}" );
1555                         $log->addEntry( 'revision', $title, $comment, $params );
1556                 }
1557         }
1558 }