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