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                 }
  89                 $qc = $this->getLogQueryCond();
  90                 # Show relevant lines from the deletion log
  91                 $wgOut->addHTML( "<h2>" . htmlspecialchars( LogPage::logName( 'delete' ) ) . "</h2>\n" );
  92                 LogEventsList::showLogExtract( $wgOut, 'delete', $this->page->getPrefixedText(), '', 25, $qc );
  93                 # Show relevant lines from the suppression log
  94                 if( $wgUser->isAllowed( 'suppressionlog' ) ) {
  95                         $wgOut->addHTML( "<h2>" . htmlspecialchars( LogPage::logName( 'suppress' ) ) . "</h2>\n" );
  96                         LogEventsList::showLogExtract( $wgOut, 'suppress', $this->page->getPrefixedText(), '', 25, $qc );
  97                 }
  98         }
  99
 100         private function showConvenienceLinks() {
 101                 global $wgOut, $wgUser;
 102                 # Give a link to the logs/hist for this page
 103                 if( !is_null($this->page) && $this->page->getNamespace() > -1 ) {
 104                         $links = array();
 105                         $logtitle = SpecialPage::getTitleFor( 'Log' );
 106                         $links[] = $this->skin->makeKnownLinkObj( $logtitle, wfMsgHtml( 'viewpagelogs' ),
 107                                 wfArrayToCGI( array( 'page' => $this->page->getPrefixedUrl() ) ) );
 108                         # Give a link to the page history
 109                         $links[] = $this->skin->makeKnownLinkObj( $this->page, wfMsgHtml( 'pagehist' ),
 110                                 wfArrayToCGI( array( 'action' => 'history' ) ) );
 111                         # Link to deleted edits
 112                         if( $wgUser->isAllowed('undelete') ) {
 113                                 $undelete = SpecialPage::getTitleFor( 'Undelete' );
 114                                 $links[] = $this->skin->makeKnownLinkObj( $undelete, wfMsgHtml( 'deletedhist' ),
 115                                         wfArrayToCGI( array( 'target' => $this->page->getPrefixedDBkey() ) ) );
 116                         }
 117                         # Logs themselves don't have histories or archived revisions
 118                         $wgOut->setSubtitle( '<p>'.implode($links,' / ').'</p>' );
 119                 }
 120         }
 121
 122         private function getLogQueryCond() {
 123                 $conds = array();
 124                 $logAction = 'revision';
 125                 switch( $this->deleteKey ) {
 126                         case 'oldid':
 127                                 $ids = $this->oldids;
 128                                 break;
 129                         case 'artimestamp':
 130                                 $ids = $this->artimestamps;
 131                                 break;
 132                         case 'oldimage':
 133                                 $ids = $this->oldimgs;
 134                                 break;
 135                         case 'fileid':
 136                                 $ids = $this->fileids;
 137                                 break;
 138                         case 'logid':
 139                                 $ids = $this->logids;
 140                                 $logAction = 'event';
 141                                 break;
 142                         default: // bad type?
 143                                 return array();
 144                 }
 145                 // Revision delete logs for these item
 146                 $conds['log_type'] = array('delete','suppress');
 147                 $conds['log_action'] = $logAction;
 148                 $conds['ls_field'] = RevisionDeleter::getRelationType( $this->deleteKey );
 149                 $conds['ls_value'] = $ids;
 150                 return $conds;
 151         }
 152
 153         private function secureOperation() {
 154                 global $wgUser;
 155                 $this->deleteKey = '';
 156                 // At this point, we should only have one of these
 157                 if( $this->oldids ) {
 158                         $this->revisions = $this->oldids;
 159                         $hide_content_name = array( 'revdelete-hide-text', 'wpHideText', Revision::DELETED_TEXT );
 160                         $this->deleteKey = 'oldid';
 161                 } else if( $this->artimestamps ) {
 162                         $this->archrevs = $this->artimestamps;
 163                         $hide_content_name = array( 'revdelete-hide-text', 'wpHideText', Revision::DELETED_TEXT );
 164                         $this->deleteKey = 'artimestamp';
 165                 } else if( $this->oldimgs ) {
 166                         $this->ofiles = $this->oldimgs;
 167                         $hide_content_name = array( 'revdelete-hide-image', 'wpHideImage', File::DELETED_FILE );
 168                         $this->deleteKey = 'oldimage';
 169                 } else if( $this->fileids ) {
 170                         $this->afiles = $this->fileids;
 171                         $hide_content_name = array( 'revdelete-hide-image', 'wpHideImage', File::DELETED_FILE );
 172                         $this->deleteKey = 'fileid';
 173                 } else if( $this->logids ) {
 174                         $this->events = $this->logids;
 175                         $hide_content_name = array( 'revdelete-hide-name', 'wpHideName', LogPage::DELETED_ACTION );
 176                         $this->deleteKey = 'logid';
 177                 }
 178                 // Our checkbox messages depends one what we are doing,
 179                 // e.g. we don't hide "text" for logs or images
 180                 $this->checks = array(
 181                         $hide_content_name,
 182                         array( 'revdelete-hide-comment', 'wpHideComment', Revision::DELETED_COMMENT ),
 183                         array( 'revdelete-hide-user', 'wpHideUser', Revision::DELETED_USER )
 184                 );
 185                 if( $wgUser->isAllowed('suppressrevision') ) {
 186                         $this->checks[] = array( 'revdelete-hide-restricted',
 187                                 'wpHideRestricted', Revision::DELETED_RESTRICTED );
 188                 }
 189         }
 190
 191         /**
 192          * Show a deleted file version requested by the visitor.
 193          */
 194         private function tryShowFile( $key ) {
 195                 global $wgOut, $wgRequest;
 196                 $oimage = RepoGroup::singleton()->getLocalRepo()->newFromArchiveName( $this->page, $key );
 197                 $oimage->load();
 198                 // Check if user is allowed to see this file
 199                 if( !$oimage->userCan(File::DELETED_FILE) ) {
 200                         $wgOut->permissionRequired( 'suppressrevision' );
 201                 } else {
 202                         $wgOut->disable();
 203                         # We mustn't allow the output to be Squid cached, otherwise
 204                         # if an admin previews a deleted image, and it's cached, then
 205                         # a user without appropriate permissions can toddle off and
 206                         # nab the image, and Squid will serve it
 207                         $wgRequest->response()->header( 'Expires: ' . gmdate( 'D, d M Y H:i:s', 0 ) . ' GMT' );
 208                         $wgRequest->response()->header( 'Cache-Control: no-cache, no-store, max-age=0, must-revalidate' );
 209                         $wgRequest->response()->header( 'Pragma: no-cache' );
 210                         # Stream the file to the client
 211                         $store = FileStore::get( 'deleted' );
 212                         $store->stream( $key );
 213                 }
 214         }
 215
 216         /**
 217          * This lets a user set restrictions for live and archived revisions
 218          */
 219         private function showRevs() {
 220                 global $wgOut, $wgUser;
 221                 $UserAllowed = true;
 222
 223                 $count = ($this->deleteKey == 'oldid') ?
 224                         count($this->revisions) : count($this->archrevs);
 225                 $wgOut->addWikiMsg( 'revdelete-selected', $this->page->getPrefixedText(), $count );
 226
 227                 $bitfields = 0;
 228                 $wgOut->addHTML( "<ul>" );
 229
 230                 $where = $revObjs = array();
 231                 $dbr = wfGetDB( DB_MASTER );
 232
 233                 $revisions = 0;
 234                 // Live revisions...
 235                 if( $this->deleteKey == 'oldid' ) {
 236                         // Run through and pull all our data in one query
 237                         foreach( $this->revisions as $revid ) {
 238                                 $where[] = intval($revid);
 239                         }
 240                         $result = $dbr->select( array('revision','page'), '*',
 241                                 array(
 242                                         'rev_page' => $this->page->getArticleID(),
 243                                         'rev_id'   => $where,
 244                                         'rev_page = page_id'
 245                                 ),
 246                                 __METHOD__
 247                         );
 248                         while( $row = $dbr->fetchObject( $result ) ) {
 249                                 $revObjs[$row->rev_id] = new Revision( $row );
 250                         }
 251                         foreach( $this->revisions as $revid ) {
 252                                 if( !isset($revObjs[$revid]) ) continue; // Must exist
 253                                 // Check if the revision was Oversighted
 254                                 if( !$revObjs[$revid]->userCan(Revision::DELETED_RESTRICTED) ) {
 255                                         if( !$this->wasPosted ) {
 256                                                 return $wgOut->permissionRequired( 'suppressrevision' );
 257                                         }
 258                                         $UserAllowed = false;
 259                                 }
 260                                 $revisions++;
 261                                 $wgOut->addHTML( $this->historyLine( $revObjs[$revid] ) );
 262                                 $bitfields |= $revObjs[$revid]->mDeleted;
 263                         }
 264                 // The archives...
 265                 } else {
 266                         // Run through and pull all our data in one query
 267                         foreach( $this->archrevs as $timestamp ) {
 268                                 $where[] = $dbr->timestamp( $timestamp );
 269                         }
 270                         $result = $dbr->select( 'archive', '*',
 271                                 array(
 272                                         'ar_namespace' => $this->page->getNamespace(),
 273                                         'ar_title'     => $this->page->getDBKey(),
 274                                         'ar_timestamp' => $where
 275                                 ),
 276                                 __METHOD__
 277                         );
 278                         while( $row = $dbr->fetchObject( $result ) ) {
 279                                 $timestamp = wfTimestamp( TS_MW, $row->ar_timestamp );
 280                                 $revObjs[$timestamp] = new Revision( array(
 281                                         'page'       => $this->page->getArticleId(),
 282                                         'id'         => $row->ar_rev_id,
 283                                         'text'       => $row->ar_text_id,
 284                                         'comment'    => $row->ar_comment,
 285                                         'user'       => $row->ar_user,
 286                                         'user_text'  => $row->ar_user_text,
 287                                         'timestamp'  => $timestamp,
 288                                         'minor_edit' => $row->ar_minor_edit,
 289                                         'text_id'    => $row->ar_text_id,
 290                                         'deleted'    => $row->ar_deleted,
 291                                         'len'        => $row->ar_len) );
 292                         }
 293                         foreach( $this->archrevs as $timestamp ) {
 294                                 if( !isset($revObjs[$timestamp]) ) {
 295                                         continue;
 296                                 } else if( !$revObjs[$timestamp]->userCan(Revision::DELETED_RESTRICTED) ) {
 297                                 // If a rev is hidden from sysops
 298                                         if( !$this->wasPosted ) {
 299                                                 return $wgOut->permissionRequired( 'suppressrevision' );
 300                                         }
 301                                         $UserAllowed = false;
 302                                 }
 303                                 $revisions++;
 304                                 $wgOut->addHTML( $this->historyLine( $revObjs[$timestamp] ) );
 305                                 $bitfields |= $revObjs[$timestamp]->mDeleted;
 306                         }
 307                 }
 308                 if( !$revisions ) {
 309                         return $wgOut->showErrorPage( 'revdelete-nooldid-title', 'revdelete-nooldid-text' );
 310                 }
 311
 312                 $wgOut->addHTML( "</ul>" );
 313                 // Explanation text
 314                 $this->addUsageText();
 315
 316                 // Normal sysops can always see what they did, but can't always change it
 317                 if( !$UserAllowed ) return;
 318
 319                 $items = array(
 320                         Xml::inputLabel( wfMsg( 'revdelete-log' ), 'wpReason', 'wpReason', 60 ),
 321                         Xml::submitButton( wfMsg( 'revdelete-submit' ) )
 322                 );
 323                 $hidden = array(
 324                         Xml::hidden( 'wpEditToken', $wgUser->editToken() ),
 325                         Xml::hidden( 'target', $this->page->getPrefixedText() ),
 326                         Xml::hidden( 'type', $this->deleteKey )
 327                 );
 328                 if( $this->deleteKey == 'oldid' ) {
 329                         $hidden[] = Xml::hidden( 'oldid', implode(',',$this->oldids) );
 330                 } else {
 331                         $hidden[] = Xml::hidden( 'artimestamp', implode(',',$this->artimestamps) );
 332                 }
 333                 $wgOut->addHTML(
 334                         Xml::openElement( 'form', array( 'method' => 'post',
 335                                 'action' => $this->getTitle()->getLocalUrl( 'action=submit' ),
 336                                 'id' => 'mw-revdel-form-revisions' ) ) .
 337                         Xml::openElement( 'fieldset' ) .
 338                         xml::element( 'legend', null,  wfMsg( 'revdelete-legend' ) )
 339                 );
 340
 341                 $wgOut->addHTML( $this->buildCheckBoxes( $bitfields ) );
 342                 foreach( $items as $item ) {
 343                         $wgOut->addHTML( Xml::tags( 'p', null, $item ) );
 344                 }
 345                 foreach( $hidden as $item ) {
 346                         $wgOut->addHTML( $item );
 347                 }
 348                 $wgOut->addHTML(
 349                         Xml::closeElement( 'fieldset' ) .
 350                         Xml::closeElement( 'form' ) . "\n"
 351                 );
 352         }
 353
 354         /**
 355          * This lets a user set restrictions for archived images
 356          */
 357         private function showImages() {
 358                 global $wgOut, $wgUser, $wgLang;
 359                 $UserAllowed = true;
 360
 361                 $count = ($this->deleteKey == 'oldimage') ? count($this->ofiles) : count($this->afiles);
 362                 $wgOut->addWikiMsg( 'revdelete-selected', $this->page->getPrefixedText(),
 363                         $wgLang->formatNum($count) );
 364
 365                 $bitfields = 0;
 366                 $wgOut->addHTML( "<ul>" );
 367
 368                 $where = $filesObjs = array();
 369                 $dbr = wfGetDB( DB_MASTER );
 370                 // Live old revisions...
 371                 $revisions = 0;
 372                 if( $this->deleteKey == 'oldimage' ) {
 373                         // Run through and pull all our data in one query
 374                         foreach( $this->ofiles as $timestamp ) {
 375                                 $where[] = $timestamp.'!'.$this->page->getDBKey();
 376                         }
 377                         $result = $dbr->select( 'oldimage', '*',
 378                                 array(
 379                                         'oi_name'         => $this->page->getDBKey(),
 380                                         'oi_archive_name' => $where
 381                                 ),
 382                                 __METHOD__
 383                         );
 384                         while( $row = $dbr->fetchObject( $result ) ) {
 385                                 $filesObjs[$row->oi_archive_name] = RepoGroup::singleton()->getLocalRepo()->newFileFromRow( $row );
 386                                 $filesObjs[$row->oi_archive_name]->user = $row->oi_user;
 387                                 $filesObjs[$row->oi_archive_name]->user_text = $row->oi_user_text;
 388                         }
 389                         // Check through our images
 390                         foreach( $this->ofiles as $timestamp ) {
 391                                 $archivename = $timestamp.'!'.$this->page->getDBKey();
 392                                 if( !isset($filesObjs[$archivename]) ) {
 393                                         continue;
 394                                 } else if( !$filesObjs[$archivename]->userCan(File::DELETED_RESTRICTED) ) {
 395                                         // If a rev is hidden from sysops
 396                                         if( !$this->wasPosted ) {
 397                                                 return $wgOut->permissionRequired( 'suppressrevision' );
 398                                         }
 399                                         $UserAllowed = false;
 400                                 }
 401                                 $revisions++;
 402                                 // Inject history info
 403                                 $wgOut->addHTML( $this->fileLine( $filesObjs[$archivename] ) );
 404                                 $bitfields |= $filesObjs[$archivename]->deleted;
 405                         }
 406                 // Archived files...
 407                 } else {
 408                         // Run through and pull all our data in one query
 409                         foreach( $this->afiles as $id ) {
 410                                 $where[] = intval($id);
 411                         }
 412                         $result = $dbr->select( 'filearchive', '*',
 413                                 array(
 414                                         'fa_name' => $this->page->getDBKey(),
 415                                         'fa_id'   => $where
 416                                 ),
 417                                 __METHOD__
 418                         );
 419                         while( $row = $dbr->fetchObject( $result ) ) {
 420                                 $filesObjs[$row->fa_id] = ArchivedFile::newFromRow( $row );
 421                         }
 422
 423                         foreach( $this->afiles as $fileid ) {
 424                                 if( !isset($filesObjs[$fileid]) ) {
 425                                         continue;
 426                                 } else if( !$filesObjs[$fileid]->userCan(File::DELETED_RESTRICTED) ) {
 427                                         // If a rev is hidden from sysops
 428                                         if( !$this->wasPosted ) {
 429                                                 return $wgOut->permissionRequired( 'suppressrevision' );
 430                                         }
 431                                         $UserAllowed = false;
 432                                 }
 433                                 $revisions++;
 434                                 // Inject history info
 435                                 $wgOut->addHTML( $this->archivedfileLine( $filesObjs[$fileid] ) );
 436                                 $bitfields |= $filesObjs[$fileid]->deleted;
 437                         }
 438                 }
 439                 if( !$revisions ) {
 440                         return $wgOut->showErrorPage( 'revdelete-nooldid-title','revdelete-nooldid-text' );
 441                 }
 442
 443                 $wgOut->addHTML( "</ul>" );
 444                 // Explanation text
 445                 $this->addUsageText();
 446                 // Normal sysops can always see what they did, but can't always change it
 447                 if( !$UserAllowed ) return;
 448
 449                 $items = array(
 450                         Xml::inputLabel( wfMsg( 'revdelete-log' ), 'wpReason', 'wpReason', 60 ),
 451                         Xml::submitButton( wfMsg( 'revdelete-submit' ) )
 452                 );
 453                 $hidden = array(
 454                         Xml::hidden( 'wpEditToken', $wgUser->editToken() ),
 455                         Xml::hidden( 'target', $this->page->getPrefixedText() ),
 456                         Xml::hidden( 'type', $this->deleteKey )
 457                 );
 458                 if( $this->deleteKey == 'oldimage' ) {
 459                         $hidden[] = Xml::hidden( 'oldimage', implode(',',$this->oldimgs) );
 460                 } else {
 461                         $hidden[] = Xml::hidden( 'fileid', implode(',',$this->fileids) );
 462                 }
 463                 $wgOut->addHTML(
 464                         Xml::openElement( 'form', array( 'method' => 'post',
 465                                 'action' => $this->getTitle()->getLocalUrl( 'action=submit' ),
 466                                 'id' => 'mw-revdel-form-filerevisions' )
 467                         ) .
 468                         Xml::fieldset( wfMsg( 'revdelete-legend' ) )
 469                 );
 470
 471                 $wgOut->addHTML( $this->buildCheckBoxes( $bitfields ) );
 472                 foreach( $items as $item ) {
 473                         $wgOut->addHTML( "<p>$item</p>" );
 474                 }
 475                 foreach( $hidden as $item ) {
 476                         $wgOut->addHTML( $item );
 477                 }
 478
 479                 $wgOut->addHTML(
 480                         Xml::closeElement( 'fieldset' ) .
 481                         Xml::closeElement( 'form' ) . "\n"
 482                 );
 483         }
 484
 485         /**
 486          * This lets a user set restrictions for log items
 487          */
 488         private function showLogItems() {
 489                 global $wgOut, $wgUser, $wgMessageCache, $wgLang;
 490                 $UserAllowed = true;
 491
 492                 $wgOut->addWikiMsg( 'logdelete-selected', $wgLang->formatNum( count($this->events) ) );
 493
 494                 $bitfields = 0;
 495                 $wgOut->addHTML( "<ul>" );
 496
 497                 $where = $logRows = array();
 498                 $dbr = wfGetDB( DB_MASTER );
 499                 // Run through and pull all our data in one query
 500                 $logItems = 0;
 501                 foreach( $this->events as $logid ) {
 502                         $where[] = intval($logid);
 503                 }
 504                 list($log,$logtype) = explode( '/',$this->page->getDBKey(), 2 );
 505                 $result = $dbr->select( 'logging', '*',
 506                         array( 'log_type' => $logtype, 'log_id' => $where ),
 507                         __METHOD__
 508                 );
 509                 while( $row = $dbr->fetchObject( $result ) ) {
 510                         $logRows[$row->log_id] = $row;
 511                 }
 512                 $wgMessageCache->loadAllMessages();
 513                 foreach( $this->events as $logid ) {
 514                         // Don't hide from oversight log!!!
 515                         if( !isset( $logRows[$logid] ) || $logRows[$logid]->log_type=='suppress' ) {
 516                                 continue;
 517                         } else if( !LogEventsList::userCan( $logRows[$logid],Revision::DELETED_RESTRICTED) ) {
 518                         // If an event is hidden from sysops
 519                                 if( !$this->wasPosted ) {
 520                                         return $wgOut->permissionRequired( 'suppressrevision' );
 521                                 }
 522                                 $UserAllowed = false;
 523                         }
 524                         $logItems++;
 525                         $wgOut->addHTML( $this->logLine( $logRows[$logid] ) );
 526                         $bitfields |= $logRows[$logid]->log_deleted;
 527                 }
 528                 if( !$logItems ) {
 529                         return $wgOut->showErrorPage( 'revdelete-nologid-title', 'revdelete-nologid-text' );
 530                 }
 531
 532                 $wgOut->addHTML( "</ul>" );
 533                 // Explanation text
 534                 $this->addUsageText();
 535                 // Normal sysops can always see what they did, but can't always change it
 536                 if( !$UserAllowed ) return;
 537
 538                 $items = array(
 539                         Xml::inputLabel( wfMsg( 'revdelete-log' ), 'wpReason', 'wpReason', 60 ),
 540                         Xml::submitButton( wfMsg( 'revdelete-submit' ) ) );
 541                 $hidden = array(
 542                         Xml::hidden( 'wpEditToken', $wgUser->editToken() ),
 543                         Xml::hidden( 'target', $this->page->getPrefixedDBKey() ),
 544                         Xml::hidden( 'page', $this->contextPage ? $this->contextPage->getPrefixedDBKey() : '' ),
 545                         Xml::hidden( 'type', $this->deleteKey ),
 546                         Xml::hidden( 'logid', implode(',',$this->logids) )
 547                 );
 548
 549                 $wgOut->addHTML(
 550                         Xml::openElement( 'form', array( 'method' => 'post',
 551                                 'action' => $this->getTitle()->getLocalUrl( 'action=submit' ), 'id' => 'mw-revdel-form-logs' ) ) .
 552                         Xml::fieldset( wfMsg( 'revdelete-legend' ) )
 553                 );
 554
 555                 $wgOut->addHTML( $this->buildCheckBoxes( $bitfields ) );
 556                 foreach( $items as $item ) {
 557                         $wgOut->addHTML( "<p>$item</p>" );
 558                 }
 559                 foreach( $hidden as $item ) {
 560                         $wgOut->addHTML( $item );
 561                 }
 562
 563                 $wgOut->addHTML(
 564                         Xml::closeElement( 'fieldset' ) .
 565                         Xml::closeElement( 'form' ) . "\n"
 566                 );
 567         }
 568
 569         private function addUsageText() {
 570                 global $wgOut, $wgUser;
 571                 $wgOut->addWikiMsg( 'revdelete-text' );
 572                 if( $wgUser->isAllowed( 'suppressrevision' ) ) {
 573                         $wgOut->addWikiMsg( 'revdelete-suppress-text' );
 574                 }
 575         }
 576
 577         /**
 578         * @param int $bitfields, aggregate bitfield of all the bitfields
 579         * @returns string HTML
 580         */
 581         private function buildCheckBoxes( $bitfields ) {
 582                 $html = '';
 583                 // FIXME: all items checked for just one rev are checked, even if not set for the others
 584                 foreach( $this->checks as $item ) {
 585                         list( $message, $name, $field ) = $item;
 586                         $line = Xml::tags( 'div', null, Xml::checkLabel( wfMsg($message), $name, $name,
 587                                 $bitfields & $field ) );
 588                         if( $field == Revision::DELETED_RESTRICTED ) $line = "<b>$line</b>";
 589                         $html .= $line;
 590                 }
 591                 return $html;
 592         }
 593
 594         /**
 595          * @param Revision $rev
 596          * @returns string
 597          */
 598         private function historyLine( $rev ) {
 599                 global $wgLang, $wgUser;
 600
 601                 $date = $wgLang->timeanddate( $rev->getTimestamp() );
 602                 $difflink = $del = '';
 603                 // Live revisions
 604                 if( $this->deleteKey == 'oldid' ) {
 605                         $tokenParams = '&unhide=1&token='.urlencode( $wgUser->editToken( $rev->getId() ) );
 606                         $revlink = $this->skin->makeLinkObj( $this->page, $date, 'oldid='.$rev->getId() . $tokenParams );
 607                         $difflink = '(' . $this->skin->makeKnownLinkObj( $this->page, wfMsgHtml('diff'),
 608                                 'diff=' . $rev->getId() . '&oldid=prev' . $tokenParams ) . ')';
 609                 // Archived revisions
 610                 } else {
 611                         $undelete = SpecialPage::getTitleFor( 'Undelete' );
 612                         $target = $this->page->getPrefixedText();
 613                         $revlink = $this->skin->makeLinkObj( $undelete, $date,
 614                                 "target=$target&timestamp=" . $rev->getTimestamp() );
 615                         $difflink = '(' . $this->skin->makeKnownLinkObj( $undelete, wfMsgHtml('diff'),
 616                                 "target=$target&diff=prev&timestamp=" . $rev->getTimestamp() ) . ')';
 617                 }
 618                 // Check permissions; items may be "suppressed"
 619                 if( $rev->isDeleted(Revision::DELETED_TEXT) ) {
 620                         $revlink = '<span class="history-deleted">'.$revlink.'</span>';
 621                         $del = ' <tt>' . wfMsgHtml( 'deletedrev' ) . '</tt>';
 622                         if( !$rev->userCan(Revision::DELETED_TEXT) ) {
 623                                 $revlink = '<span class="history-deleted">'.$date.'</span>';
 624                                 $difflink = '(' . wfMsgHtml('diff') . ')';
 625                         }
 626                 }
 627                 $userlink = $this->skin->revUserLink( $rev );
 628                 $comment = $this->skin->revComment( $rev );
 629
 630                 return "<li>$difflink $revlink $userlink $comment{$del}</li>";
 631         }
 632
 633         /**
 634          * @param File $file
 635          * @returns string
 636          */
 637         private function fileLine( $file ) {
 638                 global $wgLang;
 639
 640                 $target = $this->page->getPrefixedText();
 641                 $date = $wgLang->timeanddate( $file->getTimestamp(), true  );
 642
 643                 $del = '';
 644                 # Hidden files...
 645                 if( $file->isDeleted(File::DELETED_FILE) ) {
 646                         $del = ' <tt>' . wfMsgHtml( 'deletedrev' ) . '</tt>';
 647                         if( !$file->userCan(File::DELETED_FILE) ) {
 648                                 $pageLink = $date;
 649                         } else {
 650                                 $pageLink = $this->skin->makeKnownLinkObj( $this->getTitle(), $date,
 651                                         "target=$target&file=$file->sha1.".$file->getExtension() );
 652                         }
 653                         $pageLink = '<span class="history-deleted">' . $pageLink . '</span>';
 654                 # Regular files...
 655                 } else {
 656                         $url = $file->getUrlRel();
 657                         $pageLink = "<a href=\"{$url}\">{$date}</a>";
 658                 }
 659
 660                 $data = wfMsg( 'widthheight', $wgLang->formatNum( $file->getWidth() ),
 661                         $wgLang->formatNum( $file->getHeight() ) ) .
 662                         ' (' . wfMsgExt( 'nbytes', 'parsemag', $wgLang->formatNum( $file->getSize() ) ) . ')';
 663                 $data = htmlspecialchars( $data );
 664
 665                 return "<li>$pageLink ".$this->fileUserTools( $file )." $data ".
 666                         $this->fileComment( $file )."$del</li>";
 667         }
 668
 669         /**
 670          * @param ArchivedFile $file
 671          * @returns string
 672          */
 673         private function archivedfileLine( $file ) {
 674                 global $wgLang;
 675
 676                 $target = $this->page->getPrefixedText();
 677                 $date = $wgLang->timeanddate( $file->getTimestamp(), true  );
 678
 679                 $undelete = SpecialPage::getTitleFor( 'Undelete' );
 680                 $pageLink = $this->skin->makeKnownLinkObj( $undelete, $date,
 681                         "target=$target&file={$file->getKey()}" );
 682
 683                 $del = '';
 684                 if( $file->isDeleted(File::DELETED_FILE) ) {
 685                         $del = ' <tt>' . wfMsgHtml( 'deletedrev' ) . '</tt>';
 686                 }
 687
 688                 $data = wfMsg( 'widthheight', $wgLang->formatNum( $file->getWidth() ),
 689                         $wgLang->formatNum( $file->getHeight() ) ) .
 690                         ' (' . wfMsgExt( 'nbytes', 'parsemag', $wgLang->formatNum( $file->getSize() ) ) . ')';
 691                 $data = htmlspecialchars( $data );
 692
 693                 return "<li>$pageLink ".$this->fileUserTools( $file )." $data ".
 694                         $this->fileComment( $file )."$del</li>";
 695         }
 696
 697         /**
 698          * @param Array $row row
 699          * @returns string
 700          */
 701         private function logLine( $row ) {
 702                 global $wgLang;
 703
 704                 $date = htmlspecialchars( $wgLang->timeanddate( $row->log_timestamp ) );
 705                 $paramArray = LogPage::extractParams( $row->log_params );
 706                 $title = Title::makeTitle( $row->log_namespace, $row->log_title );
 707
 708                 $logtitle = SpecialPage::getTitleFor( 'Log' );
 709                 $loglink = $this->skin->makeKnownLinkObj( $logtitle, wfMsgHtml( 'log' ),
 710                         wfArrayToCGI( array( 'page' => $title->getPrefixedUrl() ) ) );
 711                 // Action text
 712                 if( !LogEventsList::userCan($row,LogPage::DELETED_ACTION) ) {
 713                         $action = '<span class="history-deleted">' . wfMsgHtml('rev-deleted-event') . '</span>';
 714                 } else {
 715                         $action = LogPage::actionText( $row->log_type, $row->log_action, $title,
 716                                 $this->skin, $paramArray, true, true );
 717                         if( $row->log_deleted & LogPage::DELETED_ACTION )
 718                                 $action = '<span class="history-deleted">' . $action . '</span>';
 719                 }
 720                 // User links
 721                 $userLink = $this->skin->userLink( $row->log_user, User::WhoIs($row->log_user) );
 722                 if( LogEventsList::isDeleted($row,LogPage::DELETED_USER) ) {
 723                         $userLink = '<span class="history-deleted">' . $userLink . '</span>';
 724                 }
 725                 // Comment
 726                 $comment = $wgLang->getDirMark() . $this->skin->commentBlock( $row->log_comment );
 727                 if( LogEventsList::isDeleted($row,LogPage::DELETED_COMMENT) ) {
 728                         $comment = '<span class="history-deleted">' . $comment . '</span>';
 729                 }
 730                 return "<li>($loglink) $date $userLink $action $comment</li>";
 731         }
 732
 733         /**
 734          * Generate a user tool link cluster if the current user is allowed to view it
 735          * @param ArchivedFile $file
 736          * @return string HTML
 737          */
 738         private function fileUserTools( $file ) {
 739                 if( $file->userCan( Revision::DELETED_USER ) ) {
 740                         $link = $this->skin->userLink( $file->user, $file->user_text ) .
 741                                 $this->skin->userToolLinks( $file->user, $file->user_text );
 742                 } else {
 743                         $link = wfMsgHtml( 'rev-deleted-user' );
 744                 }
 745                 if( $file->isDeleted( Revision::DELETED_USER ) ) {
 746                         return '<span class="history-deleted">' . $link . '</span>';
 747                 }
 748                 return $link;
 749         }
 750
 751         /**
 752          * Wrap and format the given file's comment block, if the current
 753          * user is allowed to view it.
 754          *
 755          * @param ArchivedFile $file
 756          * @return string HTML
 757          */
 758         private function fileComment( $file ) {
 759                 if( $file->userCan( File::DELETED_COMMENT ) ) {
 760                         $block = $this->skin->commentBlock( $file->description );
 761                 } else {
 762                         $block = ' ' . wfMsgHtml( 'rev-deleted-comment' );
 763                 }
 764                 if( $file->isDeleted( File::DELETED_COMMENT ) ) {
 765                         return "<span class=\"history-deleted\">$block</span>";
 766                 }
 767                 return $block;
 768         }
 769
 770         /**
 771          * @param WebRequest $request
 772          */
 773         private function submit( $request ) {
 774                 global $wgUser, $wgOut;
 775                 # Check edit token on submission
 776                 if( $this->wasPosted && !$wgUser->matchEditToken( $request->getVal('wpEditToken') ) ) {
 777                         $wgOut->addWikiMsg( 'sessionfailure' );
 778                         return false;
 779                 }
 780                 $bitfield = $this->extractBitfield( $request );
 781                 $comment = $request->getText( 'wpReason' );
 782                 # Can the user set this field?
 783                 if( $bitfield & Revision::DELETED_RESTRICTED && !$wgUser->isAllowed('suppressrevision') ) {
 784                         $wgOut->permissionRequired( 'suppressrevision' );
 785                         return false;
 786                 }
 787                 # If the save went through, go to success message...
 788                 if( $this->save( $bitfield, $comment, $this->page ) ) {
 789                         $this->success();
 790                         return true;
 791                 # ...otherwise, bounce back to form...
 792                 } else {
 793                         $this->failure();
 794                 }
 795                 return false;
 796         }
 797
 798         private function success() {
 799                 global $wgOut;
 800                 $wgOut->setPagetitle( wfMsg( 'actioncomplete' ) );
 801                 $wrap = '<span class="success">$1</span>';
 802                 if( $this->deleteKey == 'logid' ) {
 803                         $wgOut->wrapWikiMsg( $wrap, 'logdelete-success' );
 804                         $this->showLogItems();
 805                 } else if( $this->deleteKey == 'oldid' || $this->deleteKey == 'artimestamp' ) {
 806                         $wgOut->wrapWikiMsg( $wrap, 'revdelete-success' );
 807                         $this->showRevs();
 808                 } else if( $this->deleteKey == 'fileid' ) {
 809                         $wgOut->wrapWikiMsg( $wrap, 'revdelete-success' );
 810                         $this->showImages();
 811                 } else if( $this->deleteKey == 'oldimage' ) {
 812                         $wgOut->wrapWikiMsg( $wrap, 'revdelete-success' );
 813                         $this->showImages();
 814                 }
 815         }
 816
 817         private function failure() {
 818                 global $wgOut;
 819                 $wgOut->setPagetitle( wfMsg( 'actionfailed' ) );
 820                 $wrap = '<span class="error">$1</span>';
 821                 if( $this->deleteKey == 'logid' ) {
 822                         $this->showLogItems();
 823                 } else if( $this->deleteKey == 'oldid' || $this->deleteKey == 'artimestamp' ) {
 824                         $wgOut->wrapWikiMsg( $wrap, 'revdelete-failure' );
 825                         $this->showRevs();
 826                 } else if( $this->deleteKey == 'fileid' ) {
 827                         $wgOut->wrapWikiMsg( $wrap, 'revdelete-failure' );
 828                         $this->showImages();
 829                 } else if( $this->deleteKey == 'oldimage' ) {
 830                         $wgOut->wrapWikiMsg( $wrap, 'revdelete-failure' );
 831                         $this->showImages();
 832                 }
 833         }
 834
 835         /**
 836          * Put together a rev_deleted bitfield from the submitted checkboxes
 837          * @param WebRequest $request
 838          * @return int
 839          */
 840         private function extractBitfield( $request ) {
 841                 $bitfield = 0;
 842                 foreach( $this->checks as $item ) {
 843                         list( /* message */ , $name, $field ) = $item;
 844                         if( $request->getCheck( $name ) ) {
 845                                 $bitfield |= $field;
 846                         }
 847                 }
 848                 return $bitfield;
 849         }
 850
 851         private function save( $bitfield, $reason, $title ) {
 852                 $dbw = wfGetDB( DB_MASTER );
 853                 // Don't allow simply locking the interface for no reason
 854                 if( $bitfield == Revision::DELETED_RESTRICTED ) {
 855                         return false;
 856                 }
 857                 $deleter = new RevisionDeleter( $dbw );
 858                 // By this point, only one of the below should be set
 859                 if( isset($this->revisions) ) {
 860                         return $deleter->setRevVisibility( $title, $this->revisions, $bitfield, $reason );
 861                 } else if( isset($this->archrevs) ) {
 862                         return $deleter->setArchiveVisibility( $title, $this->archrevs, $bitfield, $reason );
 863                 } else if( isset($this->ofiles) ) {
 864                         return $deleter->setOldImgVisibility( $title, $this->ofiles, $bitfield, $reason );
 865                 } else if( isset($this->afiles) ) {
 866                         return $deleter->setArchFileVisibility( $title, $this->afiles, $bitfield, $reason );
 867                 } else if( isset($this->events) ) {
 868                         return $deleter->setEventVisibility( $title, $this->events, $bitfield, $reason );
 869                 }
 870                 return false;
 871         }
 872 }
 873
 874 /**
 875  * Implements the actions for Revision Deletion.
 876  * @ingroup SpecialPage
 877  */
 878 class RevisionDeleter {
 879         function __construct( $db ) {
 880                 $this->dbw = $db;
 881         }
 882
 883         /**
 884          * @param $title, the page these events apply to
 885          * @param array $items list of revision ID numbers
 886          * @param int $bitfield new rev_deleted value
 887          * @param string $comment Comment for log records
 888          */
 889         function setRevVisibility( $title, $items, $bitfield, $comment ) {
 890                 global $wgOut;
 891
 892                 $userAllowedAll = $success = true;
 893                 $revIDs = array();
 894                 $revCount = 0;
 895                 // Run through and pull all our data in one query
 896                 foreach( $items as $revid ) {
 897                         $where[] = intval($revid);
 898                 }
 899                 $result = $this->dbw->select( array('revision','page'), '*',
 900                         array( 'rev_page' => $title->getArticleID(),
 901                                 'rev_id' => $where, 'rev_page = page_id' ),
 902                         __METHOD__
 903                 );
 904                 while( $row = $this->dbw->fetchObject( $result ) ) {
 905                         $revObjs[$row->rev_id] = new Revision( $row );
 906                 }
 907                 // To work!
 908                 foreach( $items as $revid ) {
 909                         if( !isset($revObjs[$revid]) ) {
 910                                 $success = false;
 911                                 continue; // Must exist
 912                         } else if( $revObjs[$revid]->isCurrent() && ($bitfield & Revision::DELETED_TEXT) ) {
 913                                 $success = false;
 914                                 continue; // Cannot hide current version text
 915                         } else if( !$revObjs[$revid]->userCan(Revision::DELETED_RESTRICTED) ) {
 916                         $userAllowedAll = false;
 917                                 continue;
 918                         }
 919                         // For logging, maintain a count of revisions
 920                         if( $revObjs[$revid]->mDeleted != $bitfield ) {
 921                                 $revIDs[] = $revid;
 922                                 $this->updateRevision( $revObjs[$revid], $bitfield );
 923                                 $this->updateRecentChangesEdits( $revObjs[$revid], $bitfield, false );
 924                                 $revCount++;
 925                         }
 926                 }
 927                 // Clear caches...
 928                 // Don't log or touch if nothing changed
 929                 if( $revCount > 0 ) {
 930                         $this->updateLog( $title, $revCount, $bitfield, $revObjs[$revid]->mDeleted,
 931                                 $comment, $title, 'oldid', $revIDs );
 932                         $this->updatePage( $title );
 933                 }
 934                 // Where all revs allowed to be set?
 935                 if( !$userAllowedAll ) {
 936                         //FIXME: still might be confusing???
 937                         $wgOut->permissionRequired( 'suppressrevision' );
 938                         return false;
 939                 }
 940
 941                 return $success;
 942         }
 943
 944          /**
 945          * @param $title, the page these events apply to
 946          * @param array $items list of revision ID numbers
 947          * @param int $bitfield new rev_deleted value
 948          * @param string $comment Comment for log records
 949          */
 950         function setArchiveVisibility( $title, $items, $bitfield, $comment ) {
 951                 global $wgOut;
 952
 953                 $userAllowedAll = $success = true;
 954                 $count = 0;
 955                 $Id_set = array();
 956                 // Run through and pull all our data in one query
 957                 foreach( $items as $timestamp ) {
 958                         $where[] = $this->dbw->timestamp( $timestamp );
 959                 }
 960                 $result = $this->dbw->select( 'archive', '*',
 961                         array(
 962                                 'ar_namespace' => $title->getNamespace(),
 963                                 'ar_title' => $title->getDBKey(),
 964                                 'ar_timestamp' => $where
 965                         ), __METHOD__
 966                 );
 967                 while( $row = $this->dbw->fetchObject( $result ) ) {
 968                         $timestamp = wfTimestamp( TS_MW, $row->ar_timestamp );
 969                         $revObjs[$timestamp] = new Revision( array(
 970                                 'page'       => $title->getArticleId(),
 971                                 'id'         => $row->ar_rev_id,
 972                                 'text'       => $row->ar_text_id,
 973                                 'comment'    => $row->ar_comment,
 974                                 'user'       => $row->ar_user,
 975                                 'user_text'  => $row->ar_user_text,
 976                                 'timestamp'  => $timestamp,
 977                                 'minor_edit' => $row->ar_minor_edit,
 978                                 'text_id'    => $row->ar_text_id,
 979                                 'deleted'    => $row->ar_deleted,
 980                                 'len'        => $row->ar_len) );
 981                 }
 982                 // To work!
 983                 foreach( $items as $timestamp ) {
 984                         // This will only select the first revision with this timestamp.
 985                         // Since they are all selected/deleted at once, we can just check the
 986                         // permissions of one. UPDATE is done via timestamp, so all revs are set.
 987                         if( !is_object($revObjs[$timestamp]) ) {
 988                                 $success = false;
 989                                 continue; // Must exist
 990                         } else if( !$revObjs[$timestamp]->userCan(Revision::DELETED_RESTRICTED) ) {
 991                         $userAllowedAll=false;
 992                                 continue;
 993                         }
 994                         // Which revisions did we change anything about?
 995                         if( $revObjs[$timestamp]->mDeleted != $bitfield ) {
 996                                 $Id_set[] = $timestamp;
 997                                 $this->updateArchive( $revObjs[$timestamp], $title, $bitfield );
 998                             $count++;
 999                         }
1000                 }
1001                 // For logging, maintain a count of revisions
1002                 if( $count > 0 ) {
1003                         $this->updateLog( $title, $count, $bitfield, $revObjs[$timestamp]->mDeleted,
1004                                 $comment, $title, 'artimestamp', $Id_set );
1005                 }
1006                 // Where all revs allowed to be set?
1007                 if( !$userAllowedAll ) {
1008                         $wgOut->permissionRequired( 'suppressrevision' );
1009                         return false;
1010                 }
1011
1012                 return $success;
1013         }
1014
1015          /**
1016          * @param $title, the page these events apply to
1017          * @param array $items list of revision ID numbers
1018          * @param int $bitfield new rev_deleted value
1019          * @param string $comment Comment for log records
1020          */
1021         function setOldImgVisibility( $title, $items, $bitfield, $comment ) {
1022                 global $wgOut;
1023
1024                 $userAllowedAll = $success = true;
1025                 $count = 0;
1026                 $set = array();
1027                 // Run through and pull all our data in one query
1028                 foreach( $items as $timestamp ) {
1029                         $where[] = $timestamp.'!'.$title->getDBKey();
1030                 }
1031                 $result = $this->dbw->select( 'oldimage', '*',
1032                         array( 'oi_name' => $title->getDBKey(), 'oi_archive_name' => $where ),
1033                         __METHOD__
1034                 );
1035                 while( $row = $this->dbw->fetchObject( $result ) ) {
1036                         $filesObjs[$row->oi_archive_name] = RepoGroup::singleton()->getLocalRepo()->newFileFromRow( $row );
1037                         $filesObjs[$row->oi_archive_name]->user = $row->oi_user;
1038                         $filesObjs[$row->oi_archive_name]->user_text = $row->oi_user_text;
1039                 }
1040                 // To work!
1041                 foreach( $items as $timestamp ) {
1042                         $archivename = $timestamp.'!'.$title->getDBKey();
1043                         if( !isset($filesObjs[$archivename]) ) {
1044                                 $success = false;
1045                                 continue; // Must exist
1046                         } else if( !$filesObjs[$archivename]->userCan(File::DELETED_RESTRICTED) ) {
1047                         $userAllowedAll=false;
1048                                 continue;
1049                         }
1050
1051                         $transaction = true;
1052                         // Which revisions did we change anything about?
1053                         if( $filesObjs[$archivename]->deleted != $bitfield ) {
1054                                 $count++;
1055
1056                                 $this->dbw->begin();
1057                                 $this->updateOldFiles( $filesObjs[$archivename], $bitfield );
1058                                 // If this image is currently hidden...
1059                                 if( $filesObjs[$archivename]->deleted & File::DELETED_FILE ) {
1060                                         if( $bitfield & File::DELETED_FILE ) {
1061                                                 # Leave it alone if we are not changing this...
1062                                                 $set[]=$timestamp;
1063                                                 $transaction = true;
1064                                         } else {
1065                                                 # We are moving this out
1066                                                 $transaction = $this->makeOldImagePublic( $filesObjs[$archivename] );
1067                                                 $set[]=$transaction;
1068                                         }
1069                                 // Is it just now becoming hidden?
1070                                 } else if( $bitfield & File::DELETED_FILE ) {
1071                                         $transaction = $this->makeOldImagePrivate( $filesObjs[$archivename] );
1072                                         $set[]=$transaction;
1073                                 } else {
1074                                         $set[]=$timestamp;
1075                                 }
1076                                 // If our file operations fail, then revert back the db
1077                                 if( $transaction==false ) {
1078                                         $this->dbw->rollback();
1079                                         return false;
1080                                 }
1081                                 $this->dbw->commit();
1082                         }
1083                 }
1084
1085                 // Log if something was changed
1086                 if( $count > 0 ) {
1087                         $this->updateLog( $title, $count, $bitfield, $filesObjs[$archivename]->deleted,
1088                                 $comment, $title, 'oldimage', $set );
1089                         # Purge page/history
1090                         $file = wfLocalFile( $title );
1091                         $file->purgeCache();
1092                         $file->purgeHistory();
1093                         # Invalidate cache for all pages using this file
1094                         $update = new HTMLCacheUpdate( $title, 'imagelinks' );
1095                         $update->doUpdate();
1096                 }
1097                 // Where all revs allowed to be set?
1098                 if( !$userAllowedAll ) {
1099                         $wgOut->permissionRequired( 'suppressrevision' );
1100                         return false;
1101                 }
1102
1103                 return $success;
1104         }
1105
1106          /**
1107          * @param $title, the page these events apply to
1108          * @param array $items list of revision ID numbers
1109          * @param int $bitfield new rev_deleted value
1110          * @param string $comment Comment for log records
1111          */
1112         function setArchFileVisibility( $title, $items, $bitfield, $comment ) {
1113                 global $wgOut;
1114
1115                 $userAllowedAll = $success = true;
1116                 $count = 0;
1117                 $Id_set = array();
1118
1119                 // Run through and pull all our data in one query
1120                 foreach( $items as $id ) {
1121                         $where[] = intval($id);
1122                 }
1123                 $result = $this->dbw->select( 'filearchive', '*',
1124                         array( 'fa_name' => $title->getDBKey(),
1125                                 'fa_id' => $where ),
1126                         __METHOD__ );
1127                 while( $row = $this->dbw->fetchObject( $result ) ) {
1128                         $filesObjs[$row->fa_id] = ArchivedFile::newFromRow( $row );
1129                 }
1130                 // To work!
1131                 foreach( $items as $fileid ) {
1132                         if( !isset($filesObjs[$fileid]) ) {
1133                                 $success = false;
1134                                 continue; // Must exist
1135                         } else if( !$filesObjs[$fileid]->userCan(File::DELETED_RESTRICTED) ) {
1136                         $userAllowedAll=false;
1137                                 continue;
1138                         }
1139                         // Which revisions did we change anything about?
1140                         if( $filesObjs[$fileid]->deleted != $bitfield ) {
1141                            $Id_set[]=$fileid;
1142                            $count++;
1143
1144                            $this->updateArchFiles( $filesObjs[$fileid], $bitfield );
1145                         }
1146                 }
1147                 // Log if something was changed
1148                 if( $count > 0 ) {
1149                         $this->updateLog( $title, $count, $bitfield, $comment,
1150                                 $filesObjs[$fileid]->deleted, $title, 'fileid', $Id_set );
1151                 }
1152                 // Where all revs allowed to be set?
1153                 if( !$userAllowedAll ) {
1154                         $wgOut->permissionRequired( 'suppressrevision' );
1155                         return false;
1156                 }
1157
1158                 return $success;
1159         }
1160
1161         /**
1162          * @param $title, the log page these events apply to
1163          * @param array $items list of log ID numbers
1164          * @param int $bitfield new log_deleted value
1165          * @param string $comment Comment for log records
1166          */
1167         function setEventVisibility( $title, $items, $bitfield, $comment ) {
1168                 global $wgOut;
1169
1170                 $userAllowedAll = $success = true;
1171                 $count = 0;
1172                 $log_Ids = array();
1173
1174                 // Run through and pull all our data in one query
1175                 foreach( $items as $logid ) {
1176                         $where[] = intval($logid);
1177                 }
1178                 list($log,$logtype) = explode( '/',$title->getDBKey(), 2 );
1179                 $result = $this->dbw->select( 'logging', '*',
1180                         array( 'log_type' => $logtype, 'log_id' => $where ),
1181                         __METHOD__
1182                 );
1183                 while( $row = $this->dbw->fetchObject( $result ) ) {
1184                         $logRows[$row->log_id] = $row;
1185                 }
1186                 // To work!
1187                 foreach( $items as $logid ) {
1188                         if( !isset($logRows[$logid]) ) {
1189                                 $success = false;
1190                                 continue; // Must exist
1191                         } else if( !LogEventsList::userCan($logRows[$logid], LogPage::DELETED_RESTRICTED)
1192                                 || $logRows[$logid]->log_type == 'suppress' )
1193                         {
1194                         $userAllowedAll=false; // Don't hide from oversight log!!!
1195                         continue;
1196                         }
1197                         // Which logs did we change anything about?
1198                         if( $logRows[$logid]->log_deleted != $bitfield ) {
1199                                 $log_Ids[] = $logid;
1200                                 $this->updateLogs( $logRows[$logid], $bitfield );
1201                                 $this->updateRecentChangesLog( $logRows[$logid], $bitfield );
1202                                 $count++;
1203                         }
1204                 }
1205                 // Don't log or touch if nothing changed
1206                 if( $count > 0 ) {
1207                         $this->updateLog( $title, $count, $bitfield, $logRows[$logid]->log_deleted,
1208                                 $comment, $title, 'logid', $log_Ids );
1209                 }
1210                 // Were all revs allowed to be set?
1211                 if( !$userAllowedAll ) {
1212                         $wgOut->permissionRequired( 'suppressrevision' );
1213                         return false;
1214                 }
1215
1216                 return $success;
1217         }
1218
1219         /**
1220          * Moves an image to a safe private location
1221          * Caller is responsible for clearing caches
1222          * @param File $oimage
1223          * @returns mixed, timestamp string on success, false on failure
1224          */
1225         function makeOldImagePrivate( $oimage ) {
1226                 $transaction = new FSTransaction();
1227                 if( !FileStore::lock() ) {
1228                         wfDebug( __METHOD__.": failed to acquire file store lock, aborting\n" );
1229                         return false;
1230                 }
1231                 $oldpath = $oimage->getArchivePath() . DIRECTORY_SEPARATOR . $oimage->archive_name;
1232                 // Dupe the file into the file store
1233                 if( file_exists( $oldpath ) ) {
1234                         // Is our directory configured?
1235                         if( $store = FileStore::get( 'deleted' ) ) {
1236                                 if( !$oimage->sha1 ) {
1237                                         $oimage->upgradeRow(); // sha1 may be missing
1238                                 }
1239                                 $key = $oimage->sha1 . '.' . $oimage->getExtension();
1240                                 $transaction->add( $store->insert( $key, $oldpath, FileStore::DELETE_ORIGINAL ) );
1241                         } else {
1242                                 $group = null;
1243                                 $key = null;
1244                                 $transaction = false; // Return an error and do nothing
1245                         }
1246                 } else {
1247                         wfDebug( __METHOD__." deleting already-missing '$oldpath'; moving on to database\n" );
1248                         $group = null;
1249                         $key = '';
1250                         $transaction = new FSTransaction(); // empty
1251                 }
1252
1253                 if( $transaction === false ) {
1254                         // Fail to restore?
1255                         wfDebug( __METHOD__.": import to file store failed, aborting\n" );
1256                         throw new MWException( "Could not archive and delete file $oldpath" );
1257                         return false;
1258                 }
1259
1260                 wfDebug( __METHOD__.": set db items, applying file transactions\n" );
1261                 $transaction->commit();
1262                 FileStore::unlock();
1263
1264                 $m = explode('!',$oimage->archive_name,2);
1265                 $timestamp = $m[0];
1266
1267                 return $timestamp;
1268         }
1269
1270         /**
1271          * Moves an image from a safe private location
1272          * Caller is responsible for clearing caches
1273          * @param File $oimage
1274          * @returns mixed, string timestamp on success, false on failure
1275          */
1276         function makeOldImagePublic( $oimage ) {
1277                 $transaction = new FSTransaction();
1278                 if( !FileStore::lock() ) {
1279                         wfDebug( __METHOD__." could not acquire filestore lock\n" );
1280                         return false;
1281                 }
1282
1283                 $store = FileStore::get( 'deleted' );
1284                 if( !$store ) {
1285                         wfDebug( __METHOD__.": skipping row with no file.\n" );
1286                         return false;
1287                 }
1288
1289                 $key = $oimage->sha1.'.'.$oimage->getExtension();
1290                 $destDir = $oimage->getArchivePath();
1291                 if( !is_dir( $destDir ) ) {
1292                         wfMkdirParents( $destDir );
1293                 }
1294                 $destPath = $destDir . DIRECTORY_SEPARATOR . $oimage->archive_name;
1295                 // Check if any other stored revisions use this file;
1296                 // if so, we shouldn't remove the file from the hidden
1297                 // archives so they will still work. Check hidden files first.
1298                 $useCount = $this->dbw->selectField( 'oldimage', '1',
1299                         array( 'oi_sha1' => $oimage->sha1,
1300                                 'oi_deleted & '.File::DELETED_FILE => File::DELETED_FILE ),
1301                         __METHOD__, array( 'FOR UPDATE' ) );
1302                 // Check the rest of the deleted archives too.
1303                 // (these are the ones that don't show in the image history)
1304                 if( !$useCount ) {
1305                         $useCount = $this->dbw->selectField( 'filearchive', '1',
1306                                 array( 'fa_storage_group' => 'deleted', 'fa_storage_key' => $key ),
1307                                 __METHOD__, array( 'FOR UPDATE' ) );
1308                 }
1309
1310                 if( $useCount == 0 ) {
1311                         wfDebug( __METHOD__.": nothing else using {$oimage->sha1}, will deleting after\n" );
1312                         $flags = FileStore::DELETE_ORIGINAL;
1313                 } else {
1314                         $flags = 0;
1315                 }
1316                 $transaction->add( $store->export( $key, $destPath, $flags ) );
1317
1318                 wfDebug( __METHOD__.": set db items, applying file transactions\n" );
1319                 $transaction->commit();
1320                 FileStore::unlock();
1321
1322                 $m = explode('!',$oimage->archive_name,2);
1323                 $timestamp = $m[0];
1324
1325                 return $timestamp;
1326         }
1327
1328         /**
1329          * Update the revision's rev_deleted field
1330          * @param Revision $rev
1331          * @param int $bitfield new rev_deleted bitfield value
1332          */
1333         function updateRevision( $rev, $bitfield ) {
1334                 $this->dbw->update( 'revision',
1335                         array( 'rev_deleted' => $bitfield ),
1336                         array( 'rev_id' => $rev->getId(), 'rev_page' => $rev->getPage() ),
1337                         __METHOD__
1338                 );
1339         }
1340
1341         /**
1342          * Update the revision's rev_deleted field
1343          * @param Revision $rev
1344          * @param Title $title
1345          * @param int $bitfield new rev_deleted bitfield value
1346          */
1347         function updateArchive( $rev, $title, $bitfield ) {
1348                 $this->dbw->update( 'archive',
1349                         array( 'ar_deleted' => $bitfield ),
1350                         array( 'ar_namespace' => $title->getNamespace(),
1351                                 'ar_title'     => $title->getDBKey(),
1352                                 // use timestamp for index
1353                                 'ar_timestamp' => $this->dbw->timestamp( $rev->getTimestamp() ),
1354                                 'ar_rev_id'    => $rev->getId()
1355                         ),
1356                         __METHOD__ );
1357         }
1358
1359         /**
1360          * Update the images's oi_deleted field
1361          * @param File $file
1362          * @param int $bitfield new rev_deleted bitfield value
1363          */
1364         function updateOldFiles( $file, $bitfield ) {
1365                 $this->dbw->update( 'oldimage',
1366                         array( 'oi_deleted' => $bitfield ),
1367                         array( 'oi_name' => $file->getName(),
1368                                 'oi_timestamp' => $this->dbw->timestamp( $file->getTimestamp() ) ),
1369                         __METHOD__
1370                 );
1371         }
1372
1373         /**
1374          * Update the images's fa_deleted field
1375          * @param ArchivedFile $file
1376          * @param int $bitfield new rev_deleted bitfield value
1377          */
1378         function updateArchFiles( $file, $bitfield ) {
1379                 $this->dbw->update( 'filearchive',
1380                         array( 'fa_deleted' => $bitfield ),
1381                         array( 'fa_id' => $file->getId() ),
1382                         __METHOD__
1383                 );
1384         }
1385
1386         /**
1387          * Update the logging log_deleted field
1388          * @param Row $row
1389          * @param int $bitfield new rev_deleted bitfield value
1390          */
1391         function updateLogs( $row, $bitfield ) {
1392                 $this->dbw->update( 'logging',
1393                         array( 'log_deleted' => $bitfield ),
1394                         array( 'log_id' => $row->log_id ),
1395                         __METHOD__
1396                 );
1397         }
1398
1399         /**
1400          * Update the revision's recentchanges record if fields have been hidden
1401          * @param Revision $rev
1402          * @param int $bitfield new rev_deleted bitfield value
1403          */
1404         function updateRecentChangesEdits( $rev, $bitfield ) {
1405                 $this->dbw->update( 'recentchanges',
1406                         array( 'rc_deleted' => $bitfield,
1407                                    'rc_patrolled' => 1 ),
1408                         array( 'rc_this_oldid' => $rev->getId(),
1409                                 'rc_timestamp' => $this->dbw->timestamp( $rev->getTimestamp() ) ),
1410                         __METHOD__
1411                 );
1412         }
1413
1414         /**
1415          * Update the revision's recentchanges record if fields have been hidden
1416          * @param Row $row
1417          * @param int $bitfield new rev_deleted bitfield value
1418          */
1419         function updateRecentChangesLog( $row, $bitfield ) {
1420                 $this->dbw->update( 'recentchanges',
1421                         array( 'rc_deleted' => $bitfield,
1422                                    'rc_patrolled' => 1 ),
1423                         array( 'rc_logid' => $row->log_id,
1424                                 'rc_timestamp' => $row->log_timestamp ),
1425                         __METHOD__
1426                 );
1427         }
1428
1429         /**
1430          * Touch the page's cache invalidation timestamp; this forces cached
1431          * history views to refresh, so any newly hidden or shown fields will
1432          * update properly.
1433          * @param Title $title
1434          */
1435         function updatePage( $title ) {
1436                 $title->invalidateCache();
1437                 $this->dbw->commit(); // Commit the transaction before the purge is sent
1438                 $title->purgeSquid();
1439                 // Extensions that require referencing previous revisions may need this
1440                 wfRunHooks( 'ArticleRevisionVisiblitySet', array( &$title ) );
1441         }
1442
1443         /**
1444          * Checks for a change in the bitfield for a certain option and updates the
1445          * provided array accordingly.
1446          *
1447          * @param String $desc Description to add to the array if the option was
1448          * enabled / disabled.
1449          * @param int $field The bitmask describing the single option.
1450          * @param int $diff The xor of the old and new bitfields.
1451          * @param array $arr The array to update.
1452          */
1453         protected static function checkItem( $desc, $field, $diff, $new, &$arr ) {
1454                 if( $diff & $field ) {
1455                         $arr[ ( $new & $field ) ? 0 : 1 ][] = $desc;
1456                 }
1457         }
1458
1459         /**
1460          * Gets an array describing the changes made to the visibilit of the revision.
1461          * If the resulting array is $arr, then $arr[0] will contain an array of strings
1462          * describing the items that were hidden, $arr[2] will contain an array of strings
1463          * describing the items that were unhidden, and $arr[3] will contain an array with
1464          * a single string, which can be one of "applied restrictions to sysops",
1465          * "removed restrictions from sysops", or null.
1466          *
1467          * @param int $n The new bitfield.
1468          * @param int $o The old bitfield.
1469          * @return An array as described above.
1470          */
1471         protected static function getChanges( $n, $o ) {
1472                 $diff = $n ^ $o;
1473                 $ret = array( 0 => array(), 1 => array(), 2 => array() );
1474                 // Build bitfield changes in language
1475                 self::checkItem( wfMsgForContent( 'revdelete-content' ),
1476                         Revision::DELETED_TEXT, $diff, $n, $ret );
1477                 self::checkItem( wfMsgForContent( 'revdelete-summary' ),
1478                         Revision::DELETED_COMMENT, $diff, $n, $ret );
1479                 self::checkItem( wfMsgForContent( 'revdelete-uname' ),
1480                         Revision::DELETED_USER, $diff, $n, $ret );
1481                 // Restriction application to sysops
1482                 if( $diff & Revision::DELETED_RESTRICTED ) {
1483                         if( $n & Revision::DELETED_RESTRICTED )
1484                                 $ret[2][] = wfMsgForContent( 'revdelete-restricted' );
1485                         else
1486                                 $ret[2][] = wfMsgForContent( 'revdelete-unrestricted' );
1487                 }
1488                 return $ret;
1489         }
1490
1491         /**
1492          * Gets a log message to describe the given revision visibility change. This
1493          * message will be of the form "[hid {content, edit summary, username}];
1494          * [unhid {...}][applied restrictions to sysops] for $count revisions: $comment".
1495          *
1496          * @param int $count The number of effected revisions.
1497          * @param int $nbitfield The new bitfield for the revision.
1498          * @param int $obitfield The old bitfield for the revision.
1499          * @param bool $isForLog
1500          */
1501         public static function getLogMessage( $count, $nbitfield, $obitfield, $isForLog = false ) {
1502                 global $wgLang;
1503                 $s = '';
1504                 $changes = self::getChanges( $nbitfield, $obitfield );
1505                 if( count( $changes[0] ) ) {
1506                         $s .= wfMsgForContent( 'revdelete-hid', implode( ', ', $changes[0] ) );
1507                 }
1508                 if( count( $changes[1] ) ) {
1509                         if ($s) $s .= '; ';
1510                         $s .= wfMsgForContent( 'revdelete-unhid', implode( ', ', $changes[1] ) );
1511                 }
1512                 if( count( $changes[2] ) ) {
1513                         $s .= $s ? ' (' . $changes[2][0] . ')' : $changes[2][0];
1514                 }
1515                 $msg = $isForLog ? 'logdelete-log-message' : 'revdelete-log-message';
1516                 return wfMsgExt( $msg, array( 'parsemag', 'content' ), $s, $wgLang->formatNum($count) );
1517
1518         }
1519
1520         /**
1521          * Record a log entry on the action
1522          * @param Title $title, page where item was removed from
1523          * @param int $count the number of revisions altered for this page
1524          * @param int $nbitfield the new _deleted value
1525          * @param int $obitfield the old _deleted value
1526          * @param string $comment
1527          * @param Title $target, the relevant page
1528          * @param string $param, URL param
1529          * @param Array $items
1530          */
1531         protected function updateLog( $title, $count, $nbitfield, $obitfield, $comment, $target,
1532                 $param, $items = array() )
1533         {
1534                 // Get the URL param's corresponding DB field
1535                 if( !($field = self::getRelationType($param)) )
1536                         throw new MWException( "Bad log URL param type!" );
1537                 // Put things hidden from sysops in the oversight log
1538                 $logType = ( ($nbitfield | $obitfield) & Revision::DELETED_RESTRICTED ) ?
1539                         'suppress' : 'delete';
1540                 // Log deletions show with a difference action message
1541                 $logAction = ( $param == 'logid' ) ? 'event' : 'revision';
1542                 // Track what items changed here
1543                 $itemCSV = implode(',',$items);
1544                 // Add params for effected page and ids
1545                 if( $param == 'logid' ) {
1546                         $params = array( $itemCSV, "ofield={$obitfield}", "nfield={$nbitfield}" );
1547                 } else {
1548                         $params = array( $param, $itemCSV, "ofield={$obitfield}", "nfield={$nbitfield}" );
1549                 }
1550                 // Actually add the deletion log entry
1551                 $log = new LogPage( $logType );
1552                 $logid = $log->addEntry( $logAction, $title, $comment, $params );
1553                 // Allow for easy searching of deletion log items for revision/log items
1554                 $log->addRelations( $field, $items, $logid );
1555         }
1556
1557         // Get DB field name for URL param...
1558         // Future code for other things may also track
1559         // other types of revision-specific changes.
1560         public static function getRelationType( $param ) {
1561                 switch( $param ) {
1562                         case 'oldid':
1563                                 return 'rev_id';
1564                         case 'artimestamp':
1565                                 return 'rev_timestamp';
1566                         case 'oldimage':
1567                                 return 'oi_timestamp';
1568                         case 'fileid':
1569                                 return 'file_id';
1570                         case 'logid':
1571                                 return 'log_id';
1572                 }
1573                 return null; // bad URL type
1574         }
1575 }