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 = array_filter( explode( ',', $wgRequest->getVal('oldid') ) );
  33                 $this->artimestamps = array_filter( explode( ',', $wgRequest->getVal('artimestamp') ) );
  34                 $this->logids = array_filter( explode( ',', $wgRequest->getVal('logid') ) );
  35                 $this->oldimgs = array_filter( explode( ',', $wgRequest->getVal('oldimage') ) );
  36                 $this->fileids = array_filter( explode( ',', $wgRequest->getVal('fileid') ) );
  37                 # For reviewing deleted files...
  38                 $this->file = $wgRequest->getVal( 'file' );
  39                 # Only one target set at a time please!
  40                 $types = (bool)$this->file + (bool)$this->oldids + (bool)$this->logids
  41                         + (bool)$this->artimestamps + (bool)$this->fileids + (bool)$this->oldimgs;
  42                 # No targets?
  43                 if( $types == 0 ) {
  44                         $wgOut->showErrorPage( 'revdelete-nooldid-title', 'revdelete-nooldid-text' );
  45                         return;
  46                 # Too many targets?
  47                 } else if( $types > 1 ) {
  48                         $wgOut->showErrorPage( 'revdelete-toomanytargets-title', 'revdelete-toomanytargets-text' );
  49                         return;
  50                 }
  51                 $this->page = Title::newFromUrl( $this->target );
  52                 $this->contextPage = Title::newFromUrl( $wgRequest->getText( 'page' ) );
  53                 # If we have revisions, get the title from the first one
  54                 # since they should all be from the same page. This allows
  55                 # for more flexibility with page moves...
  56                 if( count($this->oldids) > 0 ) {
  57                         $rev = Revision::newFromId( $this->oldids[0] );
  58                         $this->page = $rev ? $rev->getTitle() : $this->page;
  59                 }
  60                 # We need a target page!
  61                 if( is_null($this->page) ) {
  62                         return $wgOut->addWikiMsg( 'undelete-header' );
  63                 }
  64                 # For reviewing deleted files...show it now if allowed
  65                 if( $this->file ) {
  66                         return $this->tryShowFile( $this->file );
  67                 }
  68                 # Logs must have a type given
  69                 if( $this->logids && !strpos($this->page->getDBKey(),'/') ) {
  70                         return $wgOut->showErrorPage( 'revdelete-nologtype-title', 'revdelete-nologtype-text' );
  71                 }
  72                 # Give a link to the logs/hist for this page
  73                 $this->showConvenienceLinks();
  74                 # Lock the operation and the form context
  75                 $this->secureOperation();
  76                 # Either submit or create our form
  77                 if( $this->wasPosted ) {
  78                         $this->submit( $wgRequest );
  79                 } else if( $this->deleteKey == 'oldid' || $this->deleteKey == 'artimestamp' ) {
  80                         $this->showRevs();
  81                 } else if( $this->deleteKey == 'fileid' || $this->deleteKey == 'oldimage' ) {
  82                         $this->showImages();
  83                 } else if( $this->deleteKey == 'logid' ) {
  84                         $this->showLogItems();
  85                 }
  86                 list($qc,$lim) = $this->getLogQueryCond();
  87                 # Show relevant lines from the deletion log
  88                 $wgOut->addHTML( "<h2>" . htmlspecialchars( LogPage::logName( 'delete' ) ) . "</h2>\n" );
  89                 LogEventsList::showLogExtract( $wgOut, 'delete', $this->page->getPrefixedText(), '', $lim, $qc );
  90                 # Show relevant lines from the suppression log
  91                 if( $wgUser->isAllowed( 'suppressionlog' ) ) {
  92                         $wgOut->addHTML( "<h2>" . htmlspecialchars( LogPage::logName( 'suppress' ) ) . "</h2>\n" );
  93                         LogEventsList::showLogExtract( $wgOut, 'suppress', $this->page->getPrefixedText(), '', $lim, $qc );
  94                 }
  95         }
  96
  97         private function showConvenienceLinks() {
  98                 global $wgOut, $wgUser;
  99                 # Give a link to the logs/hist for this page
 100                 if( !is_null($this->page) && $this->page->getNamespace() > -1 ) {
 101                         $links = array();
 102                         $logtitle = SpecialPage::getTitleFor( 'Log' );
 103                         $links[] = $this->skin->makeKnownLinkObj( $logtitle, wfMsgHtml( 'viewpagelogs' ),
 104                                 wfArrayToCGI( array( 'page' => $this->page->getPrefixedUrl() ) ) );
 105                         # Give a link to the page history
 106                         $links[] = $this->skin->makeKnownLinkObj( $this->page, wfMsgHtml( 'pagehist' ),
 107                                 wfArrayToCGI( array( 'action' => 'history' ) ) );
 108                         # Link to deleted edits
 109                         if( $wgUser->isAllowed('undelete') ) {
 110                                 $undelete = SpecialPage::getTitleFor( 'Undelete' );
 111                                 $links[] = $this->skin->makeKnownLinkObj( $undelete, wfMsgHtml( 'deletedhist' ),
 112                                         wfArrayToCGI( array( 'target' => $this->page->getPrefixedDBkey() ) ) );
 113                         }
 114                         # Logs themselves don't have histories or archived revisions
 115                         $wgOut->setSubtitle( '<p>'.implode($links,' / ').'</p>' );
 116                 }
 117         }
 118
 119         private function getLogQueryCond() {
 120                 $ids = $safeIds = array();
 121                 $action = 'revision';
 122                 $limit = 25; // default
 123                 switch( $this->deleteKey ) {
 124                         case 'oldid':
 125                                 $ids = $this->oldids;
 126                                 break;
 127                         case 'artimestamp':
 128                                 $ids = $this->artimestamps;
 129                                 break;
 130                         case 'oldimage':
 131                                 $ids = $this->oldimgs;
 132                                 break;
 133                         case 'fileid':
 134                                 $ids = $this->fileids;
 135                                 break;
 136                         case 'logid':
 137                                 $ids = $this->logids;
 138                                 $action = 'event';
 139                                 break;
 140                 }
 141                 // Revision delete logs
 142                 $conds = array( 'log_action' => $action );
 143                 // Just get the whole log if there are a lot if items
 144                 if( count($ids) > $limit )
 145                         return array($conds,$limit);
 146                 // Digit chars only
 147                 foreach( $ids as $id ) {
 148                         if( preg_match( '/^\d+$/', $id, $m ) ) {
 149                                 $safeIds[] = $m[0];
 150                         }
 151                 }
 152                 // Optimization for logs
 153                 if( $action == 'event' ) {
 154                         $dbr = wfGetDB( DB_SLAVE );
 155                         # Get the timestamp of the first item
 156                         $first = $dbr->selectField( 'logging', 'log_timestamp',
 157                                 array('log_id' => $safeIds), __METHOD__, array('ORDER BY' => 'log_id') );
 158                         # If there are no items, then stop here
 159                         if( $first == false ) {
 160                                 $conds = array('1=0');
 161                                 return array($conds,$limit);
 162                         }
 163                         # The event was be hidden after it was made
 164                         $conds[] = 'log_timestamp > '.$dbr->addQuotes($first); // type,time index
 165                 }
 166                 // Format is <id1,id2,i3...>
 167                 if( count($safeIds) ) {
 168                         $conds[] = "log_params RLIKE '(^|\n|,)(".implode('|',$safeIds).")(,|$)'";
 169                 }
 170                 return array($conds,$limit);
 171         }
 172
 173         private function secureOperation() {
 174                 global $wgUser;
 175                 $this->deleteKey = '';
 176                 // At this point, we should only have one of these
 177                 if( $this->oldids ) {
 178                         $this->revisions = $this->oldids;
 179                         $hide_content_name = array( 'revdelete-hide-text', 'wpHideText', Revision::DELETED_TEXT );
 180                         $this->deleteKey = 'oldid';
 181                 } else if( $this->artimestamps ) {
 182                         $this->archrevs = $this->artimestamps;
 183                         $hide_content_name = array( 'revdelete-hide-text', 'wpHideText', Revision::DELETED_TEXT );
 184                         $this->deleteKey = 'artimestamp';
 185                 } else if( $this->oldimgs ) {
 186                         $this->ofiles = $this->oldimgs;
 187                         $hide_content_name = array( 'revdelete-hide-image', 'wpHideImage', File::DELETED_FILE );
 188                         $this->deleteKey = 'oldimage';
 189                 } else if( $this->fileids ) {
 190                         $this->afiles = $this->fileids;
 191                         $hide_content_name = array( 'revdelete-hide-image', 'wpHideImage', File::DELETED_FILE );
 192                         $this->deleteKey = 'fileid';
 193                 } else if( $this->logids ) {
 194                         $this->events = $this->logids;
 195                         $hide_content_name = array( 'revdelete-hide-name', 'wpHideName', LogPage::DELETED_ACTION );
 196                         $this->deleteKey = 'logid';
 197                 }
 198                 // Our checkbox messages depends one what we are doing,
 199                 // e.g. we don't hide "text" for logs or images
 200                 $this->checks = array(
 201                         $hide_content_name,
 202                         array( 'revdelete-hide-comment', 'wpHideComment', Revision::DELETED_COMMENT ),
 203                         array( 'revdelete-hide-user', 'wpHideUser', Revision::DELETED_USER )
 204                 );
 205                 if( $wgUser->isAllowed('suppressrevision') ) {
 206                         $this->checks[] = array( 'revdelete-hide-restricted',
 207                                 'wpHideRestricted', Revision::DELETED_RESTRICTED );
 208                 }
 209         }
 210
 211         /**
 212          * Show a deleted file version requested by the visitor.
 213          */
 214         private function tryShowFile( $key ) {
 215                 global $wgOut, $wgRequest;
 216                 $oimage = RepoGroup::singleton()->getLocalRepo()->newFromArchiveName( $this->page, $key );
 217                 $oimage->load();
 218                 // Check if user is allowed to see this file
 219                 if( !$oimage->userCan(File::DELETED_FILE) ) {
 220                         $wgOut->permissionRequired( 'suppressrevision' );
 221                 } else {
 222                         $wgOut->disable();
 223                         # We mustn't allow the output to be Squid cached, otherwise
 224                         # if an admin previews a deleted image, and it's cached, then
 225                         # a user without appropriate permissions can toddle off and
 226                         # nab the image, and Squid will serve it
 227                         $wgRequest->response()->header( 'Expires: ' . gmdate( 'D, d M Y H:i:s', 0 ) . ' GMT' );
 228                         $wgRequest->response()->header( 'Cache-Control: no-cache, no-store, max-age=0, must-revalidate' );
 229                         $wgRequest->response()->header( 'Pragma: no-cache' );
 230                         # Stream the file to the client
 231                         $store = FileStore::get( 'deleted' );
 232                         $store->stream( $key );
 233                 }
 234         }
 235
 236         /**
 237          * This lets a user set restrictions for live and archived revisions
 238          */
 239         private function showRevs() {
 240                 global $wgOut, $wgUser;
 241                 $UserAllowed = true;
 242
 243                 $count = ($this->deleteKey == 'oldid') ?
 244                         count($this->revisions) : count($this->archrevs);
 245                 $wgOut->addWikiMsg( 'revdelete-selected', $this->page->getPrefixedText(), $count );
 246
 247                 $bitfields = 0;
 248                 $wgOut->addHTML( "<ul>" );
 249
 250                 $where = $revObjs = array();
 251                 $dbr = wfGetDB( DB_MASTER );
 252
 253                 $revisions = 0;
 254                 // Live revisions...
 255                 if( $this->deleteKey == 'oldid' ) {
 256                         // Run through and pull all our data in one query
 257                         foreach( $this->revisions as $revid ) {
 258                                 $where[] = intval($revid);
 259                         }
 260                         $result = $dbr->select( array('revision','page'), '*',
 261                                 array(
 262                                         'rev_page' => $this->page->getArticleID(),
 263                                         'rev_id' => $where,
 264                                         'rev_page = page_id' ),
 265                                 __METHOD__ );
 266                         while( $row = $dbr->fetchObject( $result ) ) {
 267                                 $revObjs[$row->rev_id] = new Revision( $row );
 268                         }
 269                         foreach( $this->revisions as $revid ) {
 270                                 // Hiding top revisison is bad
 271                                 if( !isset($revObjs[$revid]) || $revObjs[$revid]->isCurrent() ) {
 272                                         continue;
 273                                 } else if( !$revObjs[$revid]->userCan(Revision::DELETED_RESTRICTED) ) {
 274                                 // If a rev is hidden from sysops
 275                                         if( !$this->wasPosted ) {
 276                                                 $wgOut->permissionRequired( 'suppressrevision' );
 277                                                 return;
 278                                         }
 279                                         $UserAllowed = false;
 280                                 }
 281                                 $revisions++;
 282                                 $wgOut->addHTML( $this->historyLine( $revObjs[$revid] ) );
 283                                 $bitfields |= $revObjs[$revid]->mDeleted;
 284                         }
 285                 // The archives...
 286                 } else {
 287                         // Run through and pull all our data in one query
 288                         foreach( $this->archrevs as $timestamp ) {
 289                                 $where[] = $dbr->timestamp( $timestamp );
 290                         }
 291                         $result = $dbr->select( 'archive', '*',
 292                                 array(
 293                                         'ar_namespace' => $this->page->getNamespace(),
 294                                         'ar_title' => $this->page->getDBKey(),
 295                                         'ar_timestamp' => $where ),
 296                                 __METHOD__ );
 297                         while( $row = $dbr->fetchObject( $result ) ) {
 298                                 $timestamp = wfTimestamp( TS_MW, $row->ar_timestamp );
 299                                 $revObjs[$timestamp] = new Revision( array(
 300                                         'page'       => $this->page->getArticleId(),
 301                                         'id'         => $row->ar_rev_id,
 302                                         'text'       => $row->ar_text_id,
 303                                         'comment'    => $row->ar_comment,
 304                                         'user'       => $row->ar_user,
 305                                         'user_text'  => $row->ar_user_text,
 306                                         'timestamp'  => $timestamp,
 307                                         'minor_edit' => $row->ar_minor_edit,
 308                                         'text_id'    => $row->ar_text_id,
 309                                         'deleted'    => $row->ar_deleted,
 310                                         'len'        => $row->ar_len) );
 311                         }
 312                         foreach( $this->archrevs as $timestamp ) {
 313                                 if( !isset($revObjs[$timestamp]) ) {
 314                                         continue;
 315                                 } else if( !$revObjs[$timestamp]->userCan(Revision::DELETED_RESTRICTED) ) {
 316                                 // If a rev is hidden from sysops
 317                                         if( !$this->wasPosted ) {
 318                                                 $wgOut->permissionRequired( 'suppressrevision' );
 319                                                 return;
 320                                         }
 321                                         $UserAllowed = false;
 322                                 }
 323                                 $revisions++;
 324                                 $wgOut->addHTML( $this->historyLine( $revObjs[$timestamp] ) );
 325                                 $bitfields |= $revObjs[$timestamp]->mDeleted;
 326                         }
 327                 }
 328                 if( !$revisions ) {
 329                         $wgOut->showErrorPage( 'revdelete-nooldid-title', 'revdelete-nooldid-text' );
 330                         return;
 331                 }
 332
 333                 $wgOut->addHTML( "</ul>" );
 334                 // Explanation text
 335                 $this->addUsageText();
 336
 337                 // Normal sysops can always see what they did, but can't always change it
 338                 if( !$UserAllowed ) return;
 339
 340                 $items = array(
 341                         Xml::inputLabel( wfMsg( 'revdelete-log' ), 'wpReason', 'wpReason', 60 ),
 342                         Xml::submitButton( wfMsg( 'revdelete-submit' ) )
 343                 );
 344                 $hidden = array(
 345                         Xml::hidden( 'wpEditToken', $wgUser->editToken() ),
 346                         Xml::hidden( 'target', $this->page->getPrefixedText() ),
 347                         Xml::hidden( 'type', $this->deleteKey )
 348                 );
 349                 if( $this->deleteKey == 'oldid' ) {
 350                         $hidden[] = Xml::hidden( 'oldid', implode(',',$this->oldids) );
 351                 } else {
 352                         $hidden[] = Xml::hidden( 'artimestamp', implode(',',$this->artimestamps) );
 353                 }
 354                 $special = SpecialPage::getTitleFor( 'Revisiondelete' );
 355                 $wgOut->addHTML(
 356                         Xml::openElement( 'form', array( 'method' => 'post',
 357                                 'action' => $special->getLocalUrl( 'action=submit' ),
 358                                 'id' => 'mw-revdel-form-revisions' ) ) .
 359                         Xml::openElement( 'fieldset' ) .
 360                         xml::element( 'legend', null,  wfMsg( 'revdelete-legend' ) )
 361                 );
 362
 363                 $wgOut->addHTML( $this->buildCheckBoxes( $bitfields ) );
 364                 foreach( $items as $item ) {
 365                         $wgOut->addHTML( Xml::tags( 'p', null, $item ) );
 366                 }
 367                 foreach( $hidden as $item ) {
 368                         $wgOut->addHTML( $item );
 369                 }
 370                 $wgOut->addHTML(
 371                         Xml::closeElement( 'fieldset' ) .
 372                         Xml::closeElement( 'form' ) . "\n"
 373                 );
 374         }
 375
 376         /**
 377          * This lets a user set restrictions for archived images
 378          */
 379         private function showImages() {
 380                 global $wgOut, $wgUser, $wgLang;
 381                 $UserAllowed = true;
 382
 383                 $count = ($this->deleteKey == 'oldimage') ? count($this->ofiles) : count($this->afiles);
 384                 $wgOut->addWikiMsg( 'revdelete-selected', $this->page->getPrefixedText(),
 385                         $wgLang->formatNum($count) );
 386
 387                 $bitfields = 0;
 388                 $wgOut->addHTML( "<ul>" );
 389
 390                 $where = $filesObjs = array();
 391                 $dbr = wfGetDB( DB_MASTER );
 392                 // Live old revisions...
 393                 $revisions = 0;
 394                 if( $this->deleteKey == 'oldimage' ) {
 395                         // Run through and pull all our data in one query
 396                         foreach( $this->ofiles as $timestamp ) {
 397                                 $where[] = $timestamp.'!'.$this->page->getDBKey();
 398                         }
 399                         $result = $dbr->select( 'oldimage', '*',
 400                                 array(
 401                                         'oi_name' => $this->page->getDBKey(),
 402                                         'oi_archive_name' => $where ),
 403                                 __METHOD__ );
 404                         while( $row = $dbr->fetchObject( $result ) ) {
 405                                 $filesObjs[$row->oi_archive_name] = RepoGroup::singleton()->getLocalRepo()->newFileFromRow( $row );
 406                                 $filesObjs[$row->oi_archive_name]->user = $row->oi_user;
 407                                 $filesObjs[$row->oi_archive_name]->user_text = $row->oi_user_text;
 408                         }
 409                         // Check through our images
 410                         foreach( $this->ofiles as $timestamp ) {
 411                                 $archivename = $timestamp.'!'.$this->page->getDBKey();
 412                                 if( !isset($filesObjs[$archivename]) ) {
 413                                         continue;
 414                                 } else if( !$filesObjs[$archivename]->userCan(File::DELETED_RESTRICTED) ) {
 415                                         // If a rev is hidden from sysops
 416                                         if( !$this->wasPosted ) {
 417                                                 $wgOut->permissionRequired( 'suppressrevision' );
 418                                                 return;
 419                                         }
 420                                         $UserAllowed = false;
 421                                 }
 422                                 $revisions++;
 423                                 // Inject history info
 424                                 $wgOut->addHTML( $this->fileLine( $filesObjs[$archivename] ) );
 425                                 $bitfields |= $filesObjs[$archivename]->deleted;
 426                         }
 427                 // Archived files...
 428                 } else {
 429                         // Run through and pull all our data in one query
 430                         foreach( $this->afiles as $id ) {
 431                                 $where[] = intval($id);
 432                         }
 433                         $result = $dbr->select( 'filearchive', '*',
 434                                 array(
 435                                         'fa_name' => $this->page->getDBKey(),
 436                                         'fa_id' => $where ),
 437                                 __METHOD__ );
 438                         while( $row = $dbr->fetchObject( $result ) ) {
 439                                 $filesObjs[$row->fa_id] = ArchivedFile::newFromRow( $row );
 440                         }
 441
 442                         foreach( $this->afiles as $fileid ) {
 443                                 if( !isset($filesObjs[$fileid]) ) {
 444                                         continue;
 445                                 } else if( !$filesObjs[$fileid]->userCan(File::DELETED_RESTRICTED) ) {
 446                                         // If a rev is hidden from sysops
 447                                         if( !$this->wasPosted ) {
 448                                                 $wgOut->permissionRequired( 'suppressrevision' );
 449                                                 return;
 450                                         }
 451                                         $UserAllowed = false;
 452                                 }
 453                                 $revisions++;
 454                                 // Inject history info
 455                                 $wgOut->addHTML( $this->archivedfileLine( $filesObjs[$fileid] ) );
 456                                 $bitfields |= $filesObjs[$fileid]->deleted;
 457                         }
 458                 }
 459                 if( !$revisions ) {
 460                         $wgOut->showErrorPage( 'revdelete-nooldid-title', 'revdelete-nooldid-text' );
 461                         return;
 462                 }
 463
 464                 $wgOut->addHTML( "</ul>" );
 465                 // Explanation text
 466                 $this->addUsageText();
 467                 // Normal sysops can always see what they did, but can't always change it
 468                 if( !$UserAllowed ) return;
 469
 470                 $items = array(
 471                         Xml::inputLabel( wfMsg( 'revdelete-log' ), 'wpReason', 'wpReason', 60 ),
 472                         Xml::submitButton( wfMsg( 'revdelete-submit' ) )
 473                 );
 474                 $hidden = array(
 475                         Xml::hidden( 'wpEditToken', $wgUser->editToken() ),
 476                         Xml::hidden( 'target', $this->page->getPrefixedText() ),
 477                         Xml::hidden( 'type', $this->deleteKey )
 478                 );
 479                 if( $this->deleteKey == 'oldimage' ) {
 480                         $hidden[] = Xml::hidden( 'oldimage', implode(',',$this->oldimgs) );
 481                 } else {
 482                         $hidden[] = Xml::hidden( 'fileid', implode(',',$this->fileids) );
 483                 }
 484                 $special = SpecialPage::getTitleFor( 'Revisiondelete' );
 485                 $wgOut->addHTML(
 486                         Xml::openElement( 'form', array( 'method' => 'post',
 487                                 'action' => $special->getLocalUrl( 'action=submit' ),
 488                                 'id' => 'mw-revdel-form-filerevisions' )
 489                         ) .
 490                         Xml::fieldset( wfMsg( 'revdelete-legend' ) )
 491                 );
 492
 493                 $wgOut->addHTML( $this->buildCheckBoxes( $bitfields ) );
 494                 foreach( $items as $item ) {
 495                         $wgOut->addHTML( "<p>$item</p>" );
 496                 }
 497                 foreach( $hidden as $item ) {
 498                         $wgOut->addHTML( $item );
 499                 }
 500
 501                 $wgOut->addHTML(
 502                         Xml::closeElement( 'fieldset' ) .
 503                         Xml::closeElement( 'form' ) . "\n"
 504                 );
 505         }
 506
 507         /**
 508          * This lets a user set restrictions for log items
 509          */
 510         private function showLogItems() {
 511                 global $wgOut, $wgUser, $wgMessageCache, $wgLang;
 512                 $UserAllowed = true;
 513
 514                 $wgOut->addWikiMsg( 'logdelete-selected', $wgLang->formatNum( count($this->events) ) );
 515
 516                 $bitfields = 0;
 517                 $wgOut->addHTML( "<ul>" );
 518
 519                 $where = $logRows = array();
 520                 $dbr = wfGetDB( DB_MASTER );
 521                 // Run through and pull all our data in one query
 522                 $logItems = 0;
 523                 foreach( $this->events as $logid ) {
 524                         $where[] = intval($logid);
 525                 }
 526                 list($log,$logtype) = explode( '/',$this->page->getDBKey(), 2 );
 527                 $result = $dbr->select( 'logging', '*',
 528                         array(
 529                                 'log_type' => $logtype,
 530                                 'log_id' => $where ),
 531                         __METHOD__ );
 532                 while( $row = $dbr->fetchObject( $result ) ) {
 533                         $logRows[$row->log_id] = $row;
 534                 }
 535                 $wgMessageCache->loadAllMessages();
 536                 foreach( $this->events as $logid ) {
 537                         // Don't hide from oversight log!!!
 538                         if( !isset( $logRows[$logid] ) || $logRows[$logid]->log_type=='suppress' ) {
 539                                 continue;
 540                         } else if( !LogEventsList::userCan( $logRows[$logid],Revision::DELETED_RESTRICTED) ) {
 541                         // If an event is hidden from sysops
 542                                 if( !$this->wasPosted ) {
 543                                         $wgOut->permissionRequired( 'suppressrevision' );
 544                                         return;
 545                                 }
 546                                 $UserAllowed = false;
 547                         }
 548                         $logItems++;
 549                         $wgOut->addHTML( $this->logLine( $logRows[$logid] ) );
 550                         $bitfields |= $logRows[$logid]->log_deleted;
 551                 }
 552                 if( !$logItems ) {
 553                         $wgOut->showErrorPage( 'revdelete-nologid-title', 'revdelete-nologid-text' );
 554                         return;
 555                 }
 556
 557                 $wgOut->addHTML( "</ul>" );
 558                 // Explanation text
 559                 $this->addUsageText();
 560                 // Normal sysops can always see what they did, but can't always change it
 561                 if( !$UserAllowed ) return;
 562
 563                 $items = array(
 564                         Xml::inputLabel( wfMsg( 'revdelete-log' ), 'wpReason', 'wpReason', 60 ),
 565                         Xml::submitButton( wfMsg( 'revdelete-submit' ) ) );
 566                 $hidden = array(
 567                         Xml::hidden( 'wpEditToken', $wgUser->editToken() ),
 568                         Xml::hidden( 'target', $this->page->getPrefixedDBKey() ),
 569                         Xml::hidden( 'page', $this->contextPage ? $this->contextPage->getPrefixedDBKey() : '' ),
 570                         Xml::hidden( 'type', $this->deleteKey ),
 571                         Xml::hidden( 'logid', implode(',',$this->logids) )
 572                 );
 573
 574                 $special = SpecialPage::getTitleFor( 'Revisiondelete' );
 575                 $wgOut->addHTML(
 576                         Xml::openElement( 'form', array( 'method' => 'post',
 577                                 'action' => $special->getLocalUrl( 'action=submit' ), 'id' => 'mw-revdel-form-logs' ) ) .
 578                         Xml::fieldset( wfMsg( 'revdelete-legend' ) )
 579                 );
 580
 581                 $wgOut->addHTML( $this->buildCheckBoxes( $bitfields ) );
 582                 foreach( $items as $item ) {
 583                         $wgOut->addHTML( "<p>$item</p>" );
 584                 }
 585                 foreach( $hidden as $item ) {
 586                         $wgOut->addHTML( $item );
 587                 }
 588
 589                 $wgOut->addHTML(
 590                         Xml::closeElement( 'fieldset' ) .
 591                         Xml::closeElement( 'form' ) . "\n"
 592                 );
 593         }
 594
 595         private function addUsageText() {
 596                 global $wgOut, $wgUser;
 597                 $wgOut->addWikiMsg( 'revdelete-text' );
 598                 if( $wgUser->isAllowed( 'suppressrevision' ) ) {
 599                         $wgOut->addWikiMsg( 'revdelete-suppress-text' );
 600                 }
 601         }
 602
 603         /**
 604         * @param int $bitfields, aggregate bitfield of all the bitfields
 605         * @returns string HTML
 606         */
 607         private function buildCheckBoxes( $bitfields ) {
 608                 $html = '';
 609                 // FIXME: all items checked for just one rev are checked, even if not set for the others
 610                 foreach( $this->checks as $item ) {
 611                         list( $message, $name, $field ) = $item;
 612                         $line = Xml::tags( 'div', null, Xml::checkLabel( wfMsg($message), $name, $name,
 613                                 $bitfields & $field ) );
 614                         if( $field == Revision::DELETED_RESTRICTED ) $line = "<b>$line</b>";
 615                         $html .= $line;
 616                 }
 617                 return $html;
 618         }
 619
 620         /**
 621          * @param Revision $rev
 622          * @returns string
 623          */
 624         private function historyLine( $rev ) {
 625                 global $wgLang, $wgUser;
 626
 627                 $date = $wgLang->timeanddate( $rev->getTimestamp() );
 628                 $difflink = $del = '';
 629                 // Live revisions
 630                 if( $this->deleteKey == 'oldid' ) {
 631                         $tokenParams = '&unhide=1&token='.urlencode( $wgUser->editToken( $rev->getId() ) );
 632                         $revlink = $this->skin->makeLinkObj( $this->page, $date, 'oldid='.$rev->getId() . $tokenParams );
 633                         $difflink = '(' . $this->skin->makeKnownLinkObj( $this->page, wfMsgHtml('diff'),
 634                                 'diff=' . $rev->getId() . '&oldid=prev' . $tokenParams ) . ')';
 635                 // Archived revisions
 636                 } else {
 637                         $undelete = SpecialPage::getTitleFor( 'Undelete' );
 638                         $target = $this->page->getPrefixedText();
 639                         $revlink = $this->skin->makeLinkObj( $undelete, $date,
 640                                 "target=$target&timestamp=" . $rev->getTimestamp() );
 641                         $difflink = '(' . $this->skin->makeKnownLinkObj( $undelete, wfMsgHtml('diff'),
 642                                 "target=$target&diff=prev&timestamp=" . $rev->getTimestamp() ) . ')';
 643                 }
 644                 // Check permissions; items may be "suppressed"
 645                 if( $rev->isDeleted(Revision::DELETED_TEXT) ) {
 646                         $revlink = '<span class="history-deleted">'.$revlink.'</span>';
 647                         $del = ' <tt>' . wfMsgHtml( 'deletedrev' ) . '</tt>';
 648                         if( !$rev->userCan(Revision::DELETED_TEXT) ) {
 649                                 $revlink = '<span class="history-deleted">'.$date.'</span>';
 650                                 $difflink = '(' . wfMsgHtml('diff') . ')';
 651                         }
 652                 }
 653                 $userlink = $this->skin->revUserLink( $rev );
 654                 $comment = $this->skin->revComment( $rev );
 655
 656                 return "<li>$difflink $revlink $userlink $comment{$del}</li>";
 657         }
 658
 659         /**
 660          * @param File $file
 661          * @returns string
 662          */
 663         private function fileLine( $file ) {
 664                 global $wgLang, $wgTitle;
 665
 666                 $target = $this->page->getPrefixedText();
 667                 $date = $wgLang->timeanddate( $file->getTimestamp(), true  );
 668
 669                 $del = '';
 670                 # Hidden files...
 671                 if( $file->isDeleted(File::DELETED_FILE) ) {
 672                         $del = ' <tt>' . wfMsgHtml( 'deletedrev' ) . '</tt>';
 673                         if( !$file->userCan(File::DELETED_FILE) ) {
 674                                 $pageLink = $date;
 675                         } else {
 676                                 $pageLink = $this->skin->makeKnownLinkObj( $wgTitle, $date,
 677                                         "target=$target&file=$file->sha1.".$file->getExtension() );
 678                         }
 679                         $pageLink = '<span class="history-deleted">' . $pageLink . '</span>';
 680                 # Regular files...
 681                 } else {
 682                         $url = $file->getUrlRel();
 683                         $pageLink = "<a href=\"{$url}\">{$date}</a>";
 684                 }
 685
 686                 $data = wfMsg( 'widthheight',
 687                                         $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 ArchivedFile $file
 698          * @returns string
 699          */
 700         private function archivedfileLine( $file ) {
 701                 global $wgLang;
 702
 703                 $target = $this->page->getPrefixedText();
 704                 $date = $wgLang->timeanddate( $file->getTimestamp(), true  );
 705
 706                 $undelete = SpecialPage::getTitleFor( 'Undelete' );
 707                 $pageLink = $this->skin->makeKnownLinkObj( $undelete, $date,
 708                         "target=$target&file={$file->getKey()}" );
 709
 710                 $del = '';
 711                 if( $file->isDeleted(File::DELETED_FILE) ) {
 712                         $del = ' <tt>' . wfMsgHtml( 'deletedrev' ) . '</tt>';
 713                 }
 714
 715                 $data = wfMsg( 'widthheight',
 716                                         $wgLang->formatNum( $file->getWidth() ),
 717                                         $wgLang->formatNum( $file->getHeight() ) ) .
 718                         ' (' . wfMsgExt( 'nbytes', 'parsemag', $wgLang->formatNum( $file->getSize() ) ) . ')';
 719                 $data = htmlspecialchars( $data );
 720
 721                 return "<li>$pageLink ".$this->fileUserTools( $file )." $data ".
 722                         $this->fileComment( $file )."$del</li>";
 723         }
 724
 725         /**
 726          * @param Array $row row
 727          * @returns string
 728          */
 729         private function logLine( $row ) {
 730                 global $wgLang;
 731
 732                 $date = $wgLang->timeanddate( $row->log_timestamp );
 733                 $paramArray = LogPage::extractParams( $row->log_params );
 734                 $title = Title::makeTitle( $row->log_namespace, $row->log_title );
 735
 736                 $logtitle = SpecialPage::getTitleFor( 'Log' );
 737                 $loglink = $this->skin->makeKnownLinkObj( $logtitle, wfMsgHtml( 'log' ),
 738                         wfArrayToCGI( array( 'page' => $title->getPrefixedUrl() ) ) );
 739                 // Action text
 740                 if( !LogEventsList::userCan($row,LogPage::DELETED_ACTION) ) {
 741                         $action = '<span class="history-deleted">' . wfMsgHtml('rev-deleted-event') . '</span>';
 742                 } else {
 743                         $action = LogPage::actionText( $row->log_type, $row->log_action, $title,
 744                                 $this->skin, $paramArray, true, true );
 745                         if( $row->log_deleted & LogPage::DELETED_ACTION )
 746                                 $action = '<span class="history-deleted">' . $action . '</span>';
 747                 }
 748                 // User links
 749                 $userLink = $this->skin->userLink( $row->log_user, User::WhoIs($row->log_user) );
 750                 if( LogEventsList::isDeleted($row,LogPage::DELETED_USER) ) {
 751                         $userLink = '<span class="history-deleted">' . $userLink . '</span>';
 752                 }
 753                 // Comment
 754                 $comment = $wgLang->getDirMark() . $this->skin->commentBlock( $row->log_comment );
 755                 if( LogEventsList::isDeleted($row,LogPage::DELETED_COMMENT) ) {
 756                         $comment = '<span class="history-deleted">' . $comment . '</span>';
 757                 }
 758                 return "<li>($loglink) $date $userLink $action $comment</li>";
 759         }
 760
 761         /**
 762          * Generate a user tool link cluster if the current user is allowed to view it
 763          * @param ArchivedFile $file
 764          * @return string HTML
 765          */
 766         private function fileUserTools( $file ) {
 767                 if( $file->userCan( Revision::DELETED_USER ) ) {
 768                         $link = $this->skin->userLink( $file->user, $file->user_text ) .
 769                                 $this->skin->userToolLinks( $file->user, $file->user_text );
 770                 } else {
 771                         $link = wfMsgHtml( 'rev-deleted-user' );
 772                 }
 773                 if( $file->isDeleted( Revision::DELETED_USER ) ) {
 774                         return '<span class="history-deleted">' . $link . '</span>';
 775                 }
 776                 return $link;
 777         }
 778
 779         /**
 780          * Wrap and format the given file's comment block, if the current
 781          * user is allowed to view it.
 782          *
 783          * @param ArchivedFile $file
 784          * @return string HTML
 785          */
 786         private function fileComment( $file ) {
 787                 if( $file->userCan( File::DELETED_COMMENT ) ) {
 788                         $block = $this->skin->commentBlock( $file->description );
 789                 } else {
 790                         $block = ' ' . wfMsgHtml( 'rev-deleted-comment' );
 791                 }
 792                 if( $file->isDeleted( File::DELETED_COMMENT ) ) {
 793                         return "<span class=\"history-deleted\">$block</span>";
 794                 }
 795                 return $block;
 796         }
 797
 798         /**
 799          * @param WebRequest $request
 800          */
 801         private function submit( $request ) {
 802                 global $wgUser, $wgOut;
 803                 # Check edit token on submission
 804                 if( $this->wasPosted && !$wgUser->matchEditToken( $request->getVal('wpEditToken') ) ) {
 805                         $wgOut->addWikiMsg( 'sessionfailure' );
 806                         return false;
 807                 }
 808                 $bitfield = $this->extractBitfield( $request );
 809                 $comment = $request->getText( 'wpReason' );
 810                 # Can the user set this field?
 811                 if( $bitfield & Revision::DELETED_RESTRICTED && !$wgUser->isAllowed('suppressrevision') ) {
 812                         $wgOut->permissionRequired( 'suppressrevision' );
 813                         return false;
 814                 }
 815                 # If the save went through, go to success message. Otherwise
 816                 # bounce back to form...
 817                 if( $this->save( $bitfield, $comment, $this->page ) ) {
 818                         $this->success();
 819                 } else if( $request->getCheck( 'oldid' ) || $request->getCheck( 'artimestamp' ) ) {
 820                         return $this->showRevs();
 821                 } else if( $request->getCheck( 'logid' ) ) {
 822                         return $this->showLogs();
 823                 } else if( $request->getCheck( 'oldimage' ) || $request->getCheck( 'fileid' ) ) {
 824                         return $this->showImages();
 825                 }
 826         }
 827
 828         private function success() {
 829                 global $wgOut;
 830
 831                 $wgOut->setPagetitle( wfMsg( 'actioncomplete' ) );
 832
 833                 $wrap = '<span class="success">$1</span>';
 834
 835                 if( $this->deleteKey == 'logid' ) {
 836                         $wgOut->wrapWikiMsg( $wrap, 'logdelete-success' );
 837                         $this->showLogItems();
 838                 } else if( $this->deleteKey == 'oldid' || $this->deleteKey == 'artimestamp' ) {
 839                                 $wgOut->wrapWikiMsg( $wrap, 'revdelete-success' );
 840                         $this->showRevs();
 841                 } else if( $this->deleteKey == 'fileid' ) {
 842                         $wgOut->wrapWikiMsg( $wrap, 'revdelete-success' );
 843                         $this->showImages();
 844                 } else if( $this->deleteKey == 'oldimage' ) {
 845                         $wgOut->wrapWikiMsg( $wrap, 'revdelete-success' );
 846                         $this->showImages();
 847                 }
 848         }
 849
 850         /**
 851          * Put together a rev_deleted bitfield from the submitted checkboxes
 852          * @param WebRequest $request
 853          * @return int
 854          */
 855         private function extractBitfield( $request ) {
 856                 $bitfield = 0;
 857                 foreach( $this->checks as $item ) {
 858                         list( /* message */ , $name, $field ) = $item;
 859                         if( $request->getCheck( $name ) ) {
 860                                 $bitfield |= $field;
 861                         }
 862                 }
 863                 return $bitfield;
 864         }
 865
 866         private function save( $bitfield, $reason, $title ) {
 867                 $dbw = wfGetDB( DB_MASTER );
 868                 // Don't allow simply locking the interface for no reason
 869                 if( $bitfield == Revision::DELETED_RESTRICTED ) {
 870                         $bitfield = 0;
 871                 }
 872                 $deleter = new RevisionDeleter( $dbw );
 873                 // By this point, only one of the below should be set
 874                 if( isset($this->revisions) ) {
 875                         return $deleter->setRevVisibility( $title, $this->revisions, $bitfield, $reason );
 876                 } else if( isset($this->archrevs) ) {
 877                         return $deleter->setArchiveVisibility( $title, $this->archrevs, $bitfield, $reason );
 878                 } else if( isset($this->ofiles) ) {
 879                         return $deleter->setOldImgVisibility( $title, $this->ofiles, $bitfield, $reason );
 880                 } else if( isset($this->afiles) ) {
 881                         return $deleter->setArchFileVisibility( $title, $this->afiles, $bitfield, $reason );
 882                 } else if( isset($this->events) ) {
 883                         return $deleter->setEventVisibility( $title, $this->events, $bitfield, $reason );
 884                 }
 885         }
 886 }
 887
 888 /**
 889  * Implements the actions for Revision Deletion.
 890  * @ingroup SpecialPage
 891  */
 892 class RevisionDeleter {
 893         function __construct( $db ) {
 894                 $this->dbw = $db;
 895         }
 896
 897         /**
 898          * @param $title, the page these events apply to
 899          * @param array $items list of revision ID numbers
 900          * @param int $bitfield new rev_deleted value
 901          * @param string $comment Comment for log records
 902          */
 903         function setRevVisibility( $title, $items, $bitfield, $comment ) {
 904                 global $wgOut;
 905
 906                 $userAllowedAll = $success = true;
 907                 $revIDs = array();
 908                 $revCount = 0;
 909                 // Run through and pull all our data in one query
 910                 foreach( $items as $revid ) {
 911                         $where[] = intval($revid);
 912                 }
 913                 $result = $this->dbw->select( 'revision', '*',
 914                         array(
 915                                 'rev_page' => $title->getArticleID(),
 916                                 'rev_id' => $where ),
 917                         __METHOD__ );
 918                 while( $row = $this->dbw->fetchObject( $result ) ) {
 919                         $revObjs[$row->rev_id] = new Revision( $row );
 920                 }
 921                 // To work!
 922                 foreach( $items as $revid ) {
 923                         if( !isset($revObjs[$revid]) || $revObjs[$revid]->isCurrent() ) {
 924                                 $success = false;
 925                                 continue; // Must exist
 926                         } else if( !$revObjs[$revid]->userCan(Revision::DELETED_RESTRICTED) ) {
 927                         $userAllowedAll=false;
 928                                 continue;
 929                         }
 930                         // For logging, maintain a count of revisions
 931                         if( $revObjs[$revid]->mDeleted != $bitfield ) {
 932                                 $revCount++;
 933                                 $revIDs[]=$revid;
 934
 935                                 $this->updateRevision( $revObjs[$revid], $bitfield );
 936                                 $this->updateRecentChangesEdits( $revObjs[$revid], $bitfield, false );
 937                         }
 938                 }
 939                 // Clear caches...
 940                 // Don't log or touch if nothing changed
 941                 if( $revCount > 0 ) {
 942                         $this->updateLog( $title, $revCount, $bitfield, $revObjs[$revid]->mDeleted,
 943                                 $comment, $title, 'oldid', $revIDs );
 944                         $this->updatePage( $title );
 945                 }
 946                 // Where all revs allowed to be set?
 947                 if( !$userAllowedAll ) {
 948                         //FIXME: still might be confusing???
 949                         $wgOut->permissionRequired( 'suppressrevision' );
 950                         return false;
 951                 }
 952
 953                 return $success;
 954         }
 955
 956          /**
 957          * @param $title, the page these events apply to
 958          * @param array $items list of revision ID numbers
 959          * @param int $bitfield new rev_deleted value
 960          * @param string $comment Comment for log records
 961          */
 962         function setArchiveVisibility( $title, $items, $bitfield, $comment ) {
 963                 global $wgOut;
 964
 965                 $userAllowedAll = $success = true;
 966                 $count = 0;
 967                 $Id_set = array();
 968                 // Run through and pull all our data in one query
 969                 foreach( $items as $timestamp ) {
 970                         $where[] = $this->dbw->timestamp( $timestamp );
 971                 }
 972                 $result = $this->dbw->select( 'archive', '*',
 973                         array(
 974                                 'ar_namespace' => $title->getNamespace(),
 975                                 'ar_title' => $title->getDBKey(),
 976                                 'ar_timestamp' => $where ),
 977                         __METHOD__ );
 978                 while( $row = $this->dbw->fetchObject( $result ) ) {
 979                         $timestamp = wfTimestamp( TS_MW, $row->ar_timestamp );
 980                         $revObjs[$timestamp] = new Revision( array(
 981                                 'page'       => $title->getArticleId(),
 982                                 'id'         => $row->ar_rev_id,
 983                                 'text'       => $row->ar_text_id,
 984                                 'comment'    => $row->ar_comment,
 985                                 'user'       => $row->ar_user,
 986                                 'user_text'  => $row->ar_user_text,
 987                                 'timestamp'  => $timestamp,
 988                                 'minor_edit' => $row->ar_minor_edit,
 989                                 'text_id'    => $row->ar_text_id,
 990                                 'deleted'    => $row->ar_deleted,
 991                                 'len'        => $row->ar_len) );
 992                 }
 993                 // To work!
 994                 foreach( $items as $timestamp ) {
 995                         // This will only select the first revision with this timestamp.
 996                         // Since they are all selected/deleted at once, we can just check the
 997                         // permissions of one. UPDATE is done via timestamp, so all revs are set.
 998                         if( !is_object($revObjs[$timestamp]) ) {
 999                                 $success = false;
1000                                 continue; // Must exist
1001                         } else if( !$revObjs[$timestamp]->userCan(Revision::DELETED_RESTRICTED) ) {
1002                         $userAllowedAll=false;
1003                                 continue;
1004                         }
1005                         // Which revisions did we change anything about?
1006                         if( $revObjs[$timestamp]->mDeleted != $bitfield ) {
1007                            $Id_set[]=$timestamp;
1008                            $count++;
1009
1010                            $this->updateArchive( $revObjs[$timestamp], $title, $bitfield );
1011                         }
1012                 }
1013                 // For logging, maintain a count of revisions
1014                 if( $count > 0 ) {
1015                         $this->updateLog( $title, $count, $bitfield, $revObjs[$timestamp]->mDeleted,
1016                                 $comment, $title, 'artimestamp', $Id_set );
1017                 }
1018                 // Where all revs allowed to be set?
1019                 if( !$userAllowedAll ) {
1020                         $wgOut->permissionRequired( 'suppressrevision' );
1021                         return false;
1022                 }
1023
1024                 return $success;
1025         }
1026
1027          /**
1028          * @param $title, the page these events apply to
1029          * @param array $items list of revision ID numbers
1030          * @param int $bitfield new rev_deleted value
1031          * @param string $comment Comment for log records
1032          */
1033         function setOldImgVisibility( $title, $items, $bitfield, $comment ) {
1034                 global $wgOut;
1035
1036                 $userAllowedAll = $success = true;
1037                 $count = 0;
1038                 $set = array();
1039                 // Run through and pull all our data in one query
1040                 foreach( $items as $timestamp ) {
1041                         $where[] = $timestamp.'!'.$title->getDBKey();
1042                 }
1043                 $result = $this->dbw->select( 'oldimage', '*',
1044                         array(
1045                                 'oi_name' => $title->getDBKey(),
1046                                 'oi_archive_name' => $where ),
1047                         __METHOD__ );
1048                 while( $row = $this->dbw->fetchObject( $result ) ) {
1049                         $filesObjs[$row->oi_archive_name] = RepoGroup::singleton()->getLocalRepo()->newFileFromRow( $row );
1050                         $filesObjs[$row->oi_archive_name]->user = $row->oi_user;
1051                         $filesObjs[$row->oi_archive_name]->user_text = $row->oi_user_text;
1052                 }
1053                 // To work!
1054                 foreach( $items as $timestamp ) {
1055                         $archivename = $timestamp.'!'.$title->getDBKey();
1056                         if( !isset($filesObjs[$archivename]) ) {
1057                                 $success = false;
1058                                 continue; // Must exist
1059                         } else if( !$filesObjs[$archivename]->userCan(File::DELETED_RESTRICTED) ) {
1060                         $userAllowedAll=false;
1061                                 continue;
1062                         }
1063
1064                         $transaction = true;
1065                         // Which revisions did we change anything about?
1066                         if( $filesObjs[$archivename]->deleted != $bitfield ) {
1067                                 $count++;
1068
1069                                 $this->dbw->begin();
1070                                 $this->updateOldFiles( $filesObjs[$archivename], $bitfield );
1071                                 // If this image is currently hidden...
1072                                 if( $filesObjs[$archivename]->deleted & File::DELETED_FILE ) {
1073                                         if( $bitfield & File::DELETED_FILE ) {
1074                                                 # Leave it alone if we are not changing this...
1075                                                 $set[]=$timestamp;
1076                                                 $transaction = true;
1077                                         } else {
1078                                                 # We are moving this out
1079                                                 $transaction = $this->makeOldImagePublic( $filesObjs[$archivename] );
1080                                                 $set[]=$transaction;
1081                                         }
1082                                 // Is it just now becoming hidden?
1083                                 } else if( $bitfield & File::DELETED_FILE ) {
1084                                         $transaction = $this->makeOldImagePrivate( $filesObjs[$archivename] );
1085                                         $set[]=$transaction;
1086                                 } else {
1087                                         $set[]=$timestamp;
1088                                 }
1089                                 // If our file operations fail, then revert back the db
1090                                 if( $transaction==false ) {
1091                                         $this->dbw->rollback();
1092                                         return false;
1093                                 }
1094                                 $this->dbw->commit();
1095                         }
1096                 }
1097
1098                 // Log if something was changed
1099                 if( $count > 0 ) {
1100                         $this->updateLog( $title, $count, $bitfield, $filesObjs[$archivename]->deleted,
1101                                 $comment, $title, 'oldimage', $set );
1102                         # Purge page/history
1103                         $file = wfLocalFile( $title );
1104                         $file->purgeCache();
1105                         $file->purgeHistory();
1106                         # Invalidate cache for all pages using this file
1107                         $update = new HTMLCacheUpdate( $title, 'imagelinks' );
1108                         $update->doUpdate();
1109                 }
1110                 // Where all revs allowed to be set?
1111                 if( !$userAllowedAll ) {
1112                         $wgOut->permissionRequired( 'suppressrevision' );
1113                         return false;
1114                 }
1115
1116                 return $success;
1117         }
1118
1119          /**
1120          * @param $title, the page these events apply to
1121          * @param array $items list of revision ID numbers
1122          * @param int $bitfield new rev_deleted value
1123          * @param string $comment Comment for log records
1124          */
1125         function setArchFileVisibility( $title, $items, $bitfield, $comment ) {
1126                 global $wgOut;
1127
1128                 $userAllowedAll = $success = true;
1129                 $count = 0;
1130                 $Id_set = array();
1131
1132                 // Run through and pull all our data in one query
1133                 foreach( $items as $id ) {
1134                         $where[] = intval($id);
1135                 }
1136                 $result = $this->dbw->select( 'filearchive', '*',
1137                         array( 'fa_name' => $title->getDBKey(),
1138                                 'fa_id' => $where ),
1139                         __METHOD__ );
1140                 while( $row = $this->dbw->fetchObject( $result ) ) {
1141                         $filesObjs[$row->fa_id] = ArchivedFile::newFromRow( $row );
1142                 }
1143                 // To work!
1144                 foreach( $items as $fileid ) {
1145                         if( !isset($filesObjs[$fileid]) ) {
1146                                 $success = false;
1147                                 continue; // Must exist
1148                         } else if( !$filesObjs[$fileid]->userCan(File::DELETED_RESTRICTED) ) {
1149                         $userAllowedAll=false;
1150                                 continue;
1151                         }
1152                         // Which revisions did we change anything about?
1153                         if( $filesObjs[$fileid]->deleted != $bitfield ) {
1154                            $Id_set[]=$fileid;
1155                            $count++;
1156
1157                            $this->updateArchFiles( $filesObjs[$fileid], $bitfield );
1158                         }
1159                 }
1160                 // Log if something was changed
1161                 if( $count > 0 ) {
1162                         $this->updateLog( $title, $count, $bitfield, $comment,
1163                                 $filesObjs[$fileid]->deleted, $title, 'fileid', $Id_set );
1164                 }
1165                 // Where all revs allowed to be set?
1166                 if( !$userAllowedAll ) {
1167                         $wgOut->permissionRequired( 'suppressrevision' );
1168                         return false;
1169                 }
1170
1171                 return $success;
1172         }
1173
1174         /**
1175          * @param $title, the log page these events apply to
1176          * @param array $items list of log ID numbers
1177          * @param int $bitfield new log_deleted value
1178          * @param string $comment Comment for log records
1179          */
1180         function setEventVisibility( $title, $items, $bitfield, $comment ) {
1181                 global $wgOut;
1182
1183                 $userAllowedAll = $success = true;
1184                 $count = 0;
1185                 $log_Ids = array();
1186
1187                 // Run through and pull all our data in one query
1188                 foreach( $items as $logid ) {
1189                         $where[] = intval($logid);
1190                 }
1191                 list($log,$logtype) = explode( '/',$title->getDBKey(), 2 );
1192                 $result = $this->dbw->select( 'logging', '*',
1193                         array( 'log_type' => $logtype, 'log_id' => $where ),
1194                         __METHOD__
1195                 );
1196                 while( $row = $this->dbw->fetchObject( $result ) ) {
1197                         $logRows[$row->log_id] = $row;
1198                 }
1199                 // To work!
1200                 foreach( $items as $logid ) {
1201                         if( !isset($logRows[$logid]) ) {
1202                                 $success = false;
1203                                 continue; // Must exist
1204                         } else if( !LogEventsList::userCan($logRows[$logid], LogPage::DELETED_RESTRICTED)
1205                                 || $logRows[$logid]->log_type == 'suppress' )
1206                         {
1207                         $userAllowedAll=false; // Don't hide from oversight log!!!
1208                         continue;
1209                         }
1210                         // Which logs did we change anything about?
1211                         if( $logRows[$logid]->log_deleted != $bitfield ) {
1212                                 $log_Ids[] = $logid;
1213                                 $this->updateLogs( $logRows[$logid], $bitfield );
1214                                 $this->updateRecentChangesLog( $logRows[$logid], $bitfield );
1215                                 $count++;
1216                         }
1217                 }
1218                 // Don't log or touch if nothing changed
1219                 if( $count > 0 ) {
1220                         $this->updateLog( $title, $count, $bitfield, $logRows[$logid]->log_deleted,
1221                                 $comment, $title, 'logid', $log_Ids );
1222                 }
1223                 // Were all revs allowed to be set?
1224                 if( !$userAllowedAll ) {
1225                         $wgOut->permissionRequired( 'suppressrevision' );
1226                         return false;
1227                 }
1228
1229                 return $success;
1230         }
1231
1232         /**
1233          * Moves an image to a safe private location
1234          * Caller is responsible for clearing caches
1235          * @param File $oimage
1236          * @returns mixed, timestamp string on success, false on failure
1237          */
1238         function makeOldImagePrivate( $oimage ) {
1239                 $transaction = new FSTransaction();
1240                 if( !FileStore::lock() ) {
1241                         wfDebug( __METHOD__.": failed to acquire file store lock, aborting\n" );
1242                         return false;
1243                 }
1244                 $oldpath = $oimage->getArchivePath() . DIRECTORY_SEPARATOR . $oimage->archive_name;
1245                 // Dupe the file into the file store
1246                 if( file_exists( $oldpath ) ) {
1247                         // Is our directory configured?
1248                         if( $store = FileStore::get( 'deleted' ) ) {
1249                                 if( !$oimage->sha1 ) {
1250                                         $oimage->upgradeRow(); // sha1 may be missing
1251                                 }
1252                                 $key = $oimage->sha1 . '.' . $oimage->getExtension();
1253                                 $transaction->add( $store->insert( $key, $oldpath, FileStore::DELETE_ORIGINAL ) );
1254                         } else {
1255                                 $group = null;
1256                                 $key = null;
1257                                 $transaction = false; // Return an error and do nothing
1258                         }
1259                 } else {
1260                         wfDebug( __METHOD__." deleting already-missing '$oldpath'; moving on to database\n" );
1261                         $group = null;
1262                         $key = '';
1263                         $transaction = new FSTransaction(); // empty
1264                 }
1265
1266                 if( $transaction === false ) {
1267                         // Fail to restore?
1268                         wfDebug( __METHOD__.": import to file store failed, aborting\n" );
1269                         throw new MWException( "Could not archive and delete file $oldpath" );
1270                         return false;
1271                 }
1272
1273                 wfDebug( __METHOD__.": set db items, applying file transactions\n" );
1274                 $transaction->commit();
1275                 FileStore::unlock();
1276
1277                 $m = explode('!',$oimage->archive_name,2);
1278                 $timestamp = $m[0];
1279
1280                 return $timestamp;
1281         }
1282
1283         /**
1284          * Moves an image from a safe private location
1285          * Caller is responsible for clearing caches
1286          * @param File $oimage
1287          * @returns mixed, string timestamp on success, false on failure
1288          */
1289         function makeOldImagePublic( $oimage ) {
1290                 $transaction = new FSTransaction();
1291                 if( !FileStore::lock() ) {
1292                         wfDebug( __METHOD__." could not acquire filestore lock\n" );
1293                         return false;
1294                 }
1295
1296                 $store = FileStore::get( 'deleted' );
1297                 if( !$store ) {
1298                         wfDebug( __METHOD__.": skipping row with no file.\n" );
1299                         return false;
1300                 }
1301
1302                 $key = $oimage->sha1.'.'.$oimage->getExtension();
1303                 $destDir = $oimage->getArchivePath();
1304                 if( !is_dir( $destDir ) ) {
1305                         wfMkdirParents( $destDir );
1306                 }
1307                 $destPath = $destDir . DIRECTORY_SEPARATOR . $oimage->archive_name;
1308                 // Check if any other stored revisions use this file;
1309                 // if so, we shouldn't remove the file from the hidden
1310                 // archives so they will still work. Check hidden files first.
1311                 $useCount = $this->dbw->selectField( 'oldimage', '1',
1312                         array( 'oi_sha1' => $oimage->sha1,
1313                                 'oi_deleted & '.File::DELETED_FILE => File::DELETED_FILE ),
1314                         __METHOD__, array( 'FOR UPDATE' ) );
1315                 // Check the rest of the deleted archives too.
1316                 // (these are the ones that don't show in the image history)
1317                 if( !$useCount ) {
1318                         $useCount = $this->dbw->selectField( 'filearchive', '1',
1319                                 array( 'fa_storage_group' => 'deleted', 'fa_storage_key' => $key ),
1320                                 __METHOD__, array( 'FOR UPDATE' ) );
1321                 }
1322
1323                 if( $useCount == 0 ) {
1324                         wfDebug( __METHOD__.": nothing else using {$oimage->sha1}, will deleting after\n" );
1325                         $flags = FileStore::DELETE_ORIGINAL;
1326                 } else {
1327                         $flags = 0;
1328                 }
1329                 $transaction->add( $store->export( $key, $destPath, $flags ) );
1330
1331                 wfDebug( __METHOD__.": set db items, applying file transactions\n" );
1332                 $transaction->commit();
1333                 FileStore::unlock();
1334
1335                 $m = explode('!',$oimage->archive_name,2);
1336                 $timestamp = $m[0];
1337
1338                 return $timestamp;
1339         }
1340
1341         /**
1342          * Update the revision's rev_deleted field
1343          * @param Revision $rev
1344          * @param int $bitfield new rev_deleted bitfield value
1345          */
1346         function updateRevision( $rev, $bitfield ) {
1347                 $this->dbw->update( 'revision',
1348                         array( 'rev_deleted' => $bitfield ),
1349                         array( 'rev_id' => $rev->getId(),
1350                                 'rev_page' => $rev->getPage() ),
1351                         __METHOD__ );
1352         }
1353
1354         /**
1355          * Update the revision's rev_deleted field
1356          * @param Revision $rev
1357          * @param Title $title
1358          * @param int $bitfield new rev_deleted bitfield value
1359          */
1360         function updateArchive( $rev, $title, $bitfield ) {
1361                 $this->dbw->update( 'archive',
1362                         array( 'ar_deleted' => $bitfield ),
1363                         array( 'ar_namespace' => $title->getNamespace(),
1364                                 'ar_title'     => $title->getDBKey(),
1365                                 'ar_timestamp' => $this->dbw->timestamp( $rev->getTimestamp() ),
1366                                 'ar_rev_id' => $rev->getId() ),
1367                         __METHOD__ );
1368         }
1369
1370         /**
1371          * Update the images's oi_deleted field
1372          * @param File $file
1373          * @param int $bitfield new rev_deleted bitfield value
1374          */
1375         function updateOldFiles( $file, $bitfield ) {
1376                 $this->dbw->update( 'oldimage',
1377                         array( 'oi_deleted' => $bitfield ),
1378                         array( 'oi_name' => $file->getName(),
1379                                 'oi_timestamp' => $this->dbw->timestamp( $file->getTimestamp() ) ),
1380                         __METHOD__ );
1381         }
1382
1383         /**
1384          * Update the images's fa_deleted field
1385          * @param ArchivedFile $file
1386          * @param int $bitfield new rev_deleted bitfield value
1387          */
1388         function updateArchFiles( $file, $bitfield ) {
1389                 $this->dbw->update( 'filearchive',
1390                         array( 'fa_deleted' => $bitfield ),
1391                         array( 'fa_id' => $file->getId() ),
1392                         __METHOD__ );
1393         }
1394
1395         /**
1396          * Update the logging log_deleted field
1397          * @param Row $row
1398          * @param int $bitfield new rev_deleted bitfield value
1399          */
1400         function updateLogs( $row, $bitfield ) {
1401                 $this->dbw->update( 'logging',
1402                         array( 'log_deleted' => $bitfield ),
1403                         array( 'log_id' => $row->log_id ),
1404                         __METHOD__ );
1405         }
1406
1407         /**
1408          * Update the revision's recentchanges record if fields have been hidden
1409          * @param Revision $rev
1410          * @param int $bitfield new rev_deleted bitfield value
1411          */
1412         function updateRecentChangesEdits( $rev, $bitfield ) {
1413                 $this->dbw->update( 'recentchanges',
1414                         array( 'rc_deleted' => $bitfield,
1415                                    'rc_patrolled' => 1 ),
1416                         array( 'rc_this_oldid' => $rev->getId(),
1417                                 'rc_timestamp' => $this->dbw->timestamp( $rev->getTimestamp() ) ),
1418                         __METHOD__ );
1419         }
1420
1421         /**
1422          * Update the revision's recentchanges record if fields have been hidden
1423          * @param Row $row
1424          * @param int $bitfield new rev_deleted bitfield value
1425          */
1426         function updateRecentChangesLog( $row, $bitfield ) {
1427                 $this->dbw->update( 'recentchanges',
1428                         array( 'rc_deleted' => $bitfield,
1429                                    'rc_patrolled' => 1 ),
1430                         array( 'rc_logid' => $row->log_id,
1431                                 'rc_timestamp' => $row->log_timestamp ),
1432                         __METHOD__ );
1433         }
1434
1435         /**
1436          * Touch the page's cache invalidation timestamp; this forces cached
1437          * history views to refresh, so any newly hidden or shown fields will
1438          * update properly.
1439          * @param Title $title
1440          */
1441         function updatePage( $title ) {
1442                 $title->invalidateCache();
1443                 $title->purgeSquid();
1444                 $title->touchLinks();
1445                 // Extensions that require referencing previous revisions may need this
1446                 wfRunHooks( 'ArticleRevisionVisiblitySet', array( &$title ) );
1447         }
1448
1449         /**
1450          * Checks for a change in the bitfield for a certain option and updates the
1451          * provided array accordingly.
1452          *
1453          * @param String $desc Description to add to the array if the option was
1454          * enabled / disabled.
1455          * @param int $field The bitmask describing the single option.
1456          * @param int $diff The xor of the old and new bitfields.
1457          * @param array $arr The array to update.
1458          */
1459         function checkItem( $desc, $field, $diff, $new, &$arr ) {
1460                 if( $diff & $field ) {
1461                         $arr[ ( $new & $field ) ? 0 : 1 ][] = $desc;
1462                 }
1463         }
1464
1465         /**
1466          * Gets an array describing the changes made to the visibilit of the revision.
1467          * If the resulting array is $arr, then $arr[0] will contain an array of strings
1468          * describing the items that were hidden, $arr[2] will contain an array of strings
1469          * describing the items that were unhidden, and $arr[3] will contain an array with
1470          * a single string, which can be one of "applied restrictions to sysops",
1471          * "removed restrictions from sysops", or null.
1472          *
1473          * @param int $n The new bitfield.
1474          * @param int $o The old bitfield.
1475          * @return An array as described above.
1476          */
1477         function getChanges( $n, $o ) {
1478                 $diff = $n ^ $o;
1479                 $ret = array( 0 => array(), 1 => array(), 2 => array() );
1480                 // Build bitfield changes in language
1481                 $this->checkItem( wfMsgForContent( 'revdelete-content' ),
1482                         Revision::DELETED_TEXT, $diff, $n, $ret );
1483                 $this->checkItem( wfMsgForContent( 'revdelete-summary' ),
1484                         Revision::DELETED_COMMENT, $diff, $n, $ret );
1485                 $this->checkItem( wfMsgForContent( 'revdelete-uname' ),
1486                         Revision::DELETED_USER, $diff, $n, $ret );
1487                 // Restriction application to sysops
1488                 if( $diff & Revision::DELETED_RESTRICTED ) {
1489                         if( $n & Revision::DELETED_RESTRICTED )
1490                                 $ret[2][] = wfMsgForContent( 'revdelete-restricted' );
1491                         else
1492                                 $ret[2][] = wfMsgForContent( 'revdelete-unrestricted' );
1493                 }
1494                 return $ret;
1495         }
1496
1497         /**
1498          * Gets a log message to describe the given revision visibility change. This
1499          * message will be of the form "[hid {content, edit summary, username}];
1500          * [unhid {...}][applied restrictions to sysops] for $count revisions: $comment".
1501          *
1502          * @param int $count The number of effected revisions.
1503          * @param int $nbitfield The new bitfield for the revision.
1504          * @param int $obitfield The old bitfield for the revision.
1505          * @param string $comment The comment associated with the change.
1506          * @param bool $isForLog
1507          */
1508         function getLogMessage( $count, $nbitfield, $obitfield, $comment, $isForLog = false ) {
1509                 global $wgContLang;
1510
1511                 $s = '';
1512                 $changes = $this->getChanges( $nbitfield, $obitfield );
1513
1514                 if( count( $changes[0] ) ) {
1515                         $s .= wfMsgForContent ( 'revdelete-hid', implode ( ', ', $changes[0] ) );
1516                 }
1517                 if( count( $changes[1] ) ) {
1518                         if ($s) $s .= '; ';
1519                         $s .= wfMsgForContent ( 'revdelete-unhid', implode ( ', ', $changes[1] ) );
1520                 }
1521                 if( count( $changes[2] ) ) {
1522                         $s .= $s ? ' (' . $changes[2][0] . ')' : $changes[2][0];
1523                 }
1524
1525                 $msg = $isForLog ? 'logdelete-log-message' : 'revdelete-log-message';
1526                 $ret = wfMsgExt ( $msg, array( 'parsemag', 'content' ),
1527                         $s, $wgContLang->formatNum( $count ) );
1528
1529                 if( $comment ) $ret .= ": $comment";
1530
1531                 return $ret;
1532
1533         }
1534
1535         /**
1536          * Record a log entry on the action
1537          * @param Title $title, page where item was removed from
1538          * @param int $count the number of revisions altered for this page
1539          * @param int $nbitfield the new _deleted value
1540          * @param int $obitfield the old _deleted value
1541          * @param string $comment
1542          * @param Title $target, the relevant page
1543          * @param string $param, URL param
1544          * @param Array $items
1545          */
1546         function updateLog( $title, $count, $nbitfield, $obitfield, $comment, $target,
1547                 $param, $items = array() )
1548         {
1549                 // Put things hidden from sysops in the oversight log
1550                 $logtype = ( ($nbitfield | $obitfield) & Revision::DELETED_RESTRICTED ) ?
1551                         'suppress' : 'delete';
1552                 $log = new LogPage( $logtype );
1553
1554                 $reason = $this->getLogMessage( $count, $nbitfield, $obitfield, $comment, $param == 'logid' );
1555
1556                 if( $param == 'logid' ) {
1557                         $params = array( implode( ',', $items) );
1558                         $log->addEntry( 'event', $title, $reason, $params );
1559                 } else {
1560                         // Add params for effected page and ids
1561                         $params = array( $param, implode( ',', $items) );
1562                         $log->addEntry( 'revision', $title, $reason, $params );
1563                 }
1564         }
1565 }