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