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 $revid ) {
 270                                 if( !isset($revObjs[$revid]) ) continue; // Must exist
 271                                 // Check if the revision was Oversighted
 272                                 if( !$revObjs[$revid]->userCan(Revision::DELETED_RESTRICTED) ) {
 273                                         if( !$this->wasPosted ) {
 274                                                 $wgOut->permissionRequired( 'suppressrevision' );
 275                                                 return;
 276                                         }
 277                                         $UserAllowed = false;
 278                                 }
 279                                 $revisions++;
 280                                 $wgOut->addHTML( $this->historyLine( $revObjs[$revid] ) );
 281                                 $bitfields |= $revObjs[$revid]->mDeleted;
 282                         }
 283                 // The archives...
 284                 } else {
 285                         // Run through and pull all our data in one query
 286                         foreach( $this->archrevs as $timestamp ) {
 287                                 $where[] = $dbr->timestamp( $timestamp );
 288                         }
 289                         $result = $dbr->select( 'archive', '*',
 290                                 array(
 291                                         'ar_namespace' => $this->page->getNamespace(),
 292                                         'ar_title' => $this->page->getDBKey(),
 293                                         'ar_timestamp' => $where ),
 294                                 __METHOD__ );
 295                         while( $row = $dbr->fetchObject( $result ) ) {
 296                                 $timestamp = wfTimestamp( TS_MW, $row->ar_timestamp );
 297                                 $revObjs[$timestamp] = new Revision( array(
 298                                         'page'       => $this->page->getArticleId(),
 299                                         'id'         => $row->ar_rev_id,
 300                                         'text'       => $row->ar_text_id,
 301                                         'comment'    => $row->ar_comment,
 302                                         'user'       => $row->ar_user,
 303                                         'user_text'  => $row->ar_user_text,
 304                                         'timestamp'  => $timestamp,
 305                                         'minor_edit' => $row->ar_minor_edit,
 306                                         'text_id'    => $row->ar_text_id,
 307                                         'deleted'    => $row->ar_deleted,
 308                                         'len'        => $row->ar_len) );
 309                         }
 310                         foreach( $this->archrevs as $timestamp ) {
 311                                 if( !isset($revObjs[$timestamp]) ) {
 312                                         continue;
 313                                 } else if( !$revObjs[$timestamp]->userCan(Revision::DELETED_RESTRICTED) ) {
 314                                 // If a rev is hidden from sysops
 315                                         if( !$this->wasPosted ) {
 316                                                 $wgOut->permissionRequired( 'suppressrevision' );
 317                                                 return;
 318                                         }
 319                                         $UserAllowed = false;
 320                                 }
 321                                 $revisions++;
 322                                 $wgOut->addHTML( $this->historyLine( $revObjs[$timestamp] ) );
 323                                 $bitfields |= $revObjs[$timestamp]->mDeleted;
 324                         }
 325                 }
 326                 if( !$revisions ) {
 327                         $wgOut->showErrorPage( 'revdelete-nooldid-title', 'revdelete-nooldid-text' );
 328                         return;
 329                 }
 330
 331                 $wgOut->addHTML( "</ul>" );
 332                 // Explanation text
 333                 $this->addUsageText();
 334
 335                 // Normal sysops can always see what they did, but can't always change it
 336                 if( !$UserAllowed ) return;
 337
 338                 $items = array(
 339                         Xml::inputLabel( wfMsg( 'revdelete-log' ), 'wpReason', 'wpReason', 60 ),
 340                         Xml::submitButton( wfMsg( 'revdelete-submit' ) )
 341                 );
 342                 $hidden = array(
 343                         Xml::hidden( 'wpEditToken', $wgUser->editToken() ),
 344                         Xml::hidden( 'target', $this->page->getPrefixedText() ),
 345                         Xml::hidden( 'type', $this->deleteKey )
 346                 );
 347                 if( $this->deleteKey == 'oldid' ) {
 348                         $hidden[] = Xml::hidden( 'oldid', implode(',',$this->oldids) );
 349                 } else {
 350                         $hidden[] = Xml::hidden( 'artimestamp', implode(',',$this->artimestamps) );
 351                 }
 352                 $special = SpecialPage::getTitleFor( 'Revisiondelete' );
 353                 $wgOut->addHTML(
 354                         Xml::openElement( 'form', array( 'method' => 'post',
 355                                 'action' => $special->getLocalUrl( 'action=submit' ),
 356                                 'id' => 'mw-revdel-form-revisions' ) ) .
 357                         Xml::openElement( 'fieldset' ) .
 358                         xml::element( 'legend', null,  wfMsg( 'revdelete-legend' ) )
 359                 );
 360
 361                 $wgOut->addHTML( $this->buildCheckBoxes( $bitfields ) );
 362                 foreach( $items as $item ) {
 363                         $wgOut->addHTML( Xml::tags( 'p', null, $item ) );
 364                 }
 365                 foreach( $hidden as $item ) {
 366                         $wgOut->addHTML( $item );
 367                 }
 368                 $wgOut->addHTML(
 369                         Xml::closeElement( 'fieldset' ) .
 370                         Xml::closeElement( 'form' ) . "\n"
 371                 );
 372         }
 373
 374         /**
 375          * This lets a user set restrictions for archived images
 376          */
 377         private function showImages() {
 378                 global $wgOut, $wgUser, $wgLang;
 379                 $UserAllowed = true;
 380
 381                 $count = ($this->deleteKey == 'oldimage') ? count($this->ofiles) : count($this->afiles);
 382                 $wgOut->addWikiMsg( 'revdelete-selected', $this->page->getPrefixedText(),
 383                         $wgLang->formatNum($count) );
 384
 385                 $bitfields = 0;
 386                 $wgOut->addHTML( "<ul>" );
 387
 388                 $where = $filesObjs = array();
 389                 $dbr = wfGetDB( DB_MASTER );
 390                 // Live old revisions...
 391                 $revisions = 0;
 392                 if( $this->deleteKey == 'oldimage' ) {
 393                         // Run through and pull all our data in one query
 394                         foreach( $this->ofiles as $timestamp ) {
 395                                 $where[] = $timestamp.'!'.$this->page->getDBKey();
 396                         }
 397                         $result = $dbr->select( 'oldimage', '*',
 398                                 array(
 399                                         'oi_name' => $this->page->getDBKey(),
 400                                         'oi_archive_name' => $where ),
 401                                 __METHOD__ );
 402                         while( $row = $dbr->fetchObject( $result ) ) {
 403                                 $filesObjs[$row->oi_archive_name] = RepoGroup::singleton()->getLocalRepo()->newFileFromRow( $row );
 404                                 $filesObjs[$row->oi_archive_name]->user = $row->oi_user;
 405                                 $filesObjs[$row->oi_archive_name]->user_text = $row->oi_user_text;
 406                         }
 407                         // Check through our images
 408                         foreach( $this->ofiles as $timestamp ) {
 409                                 $archivename = $timestamp.'!'.$this->page->getDBKey();
 410                                 if( !isset($filesObjs[$archivename]) ) {
 411                                         continue;
 412                                 } else if( !$filesObjs[$archivename]->userCan(File::DELETED_RESTRICTED) ) {
 413                                         // If a rev is hidden from sysops
 414                                         if( !$this->wasPosted ) {
 415                                                 $wgOut->permissionRequired( 'suppressrevision' );
 416                                                 return;
 417                                         }
 418                                         $UserAllowed = false;
 419                                 }
 420                                 $revisions++;
 421                                 // Inject history info
 422                                 $wgOut->addHTML( $this->fileLine( $filesObjs[$archivename] ) );
 423                                 $bitfields |= $filesObjs[$archivename]->deleted;
 424                         }
 425                 // Archived files...
 426                 } else {
 427                         // Run through and pull all our data in one query
 428                         foreach( $this->afiles as $id ) {
 429                                 $where[] = intval($id);
 430                         }
 431                         $result = $dbr->select( 'filearchive', '*',
 432                                 array(
 433                                         'fa_name' => $this->page->getDBKey(),
 434                                         'fa_id' => $where ),
 435                                 __METHOD__ );
 436                         while( $row = $dbr->fetchObject( $result ) ) {
 437                                 $filesObjs[$row->fa_id] = ArchivedFile::newFromRow( $row );
 438                         }
 439
 440                         foreach( $this->afiles as $fileid ) {
 441                                 if( !isset($filesObjs[$fileid]) ) {
 442                                         continue;
 443                                 } else if( !$filesObjs[$fileid]->userCan(File::DELETED_RESTRICTED) ) {
 444                                         // If a rev is hidden from sysops
 445                                         if( !$this->wasPosted ) {
 446                                                 $wgOut->permissionRequired( 'suppressrevision' );
 447                                                 return;
 448                                         }
 449                                         $UserAllowed = false;
 450                                 }
 451                                 $revisions++;
 452                                 // Inject history info
 453                                 $wgOut->addHTML( $this->archivedfileLine( $filesObjs[$fileid] ) );
 454                                 $bitfields |= $filesObjs[$fileid]->deleted;
 455                         }
 456                 }
 457                 if( !$revisions ) {
 458                         $wgOut->showErrorPage( 'revdelete-nooldid-title', 'revdelete-nooldid-text' );
 459                         return;
 460                 }
 461
 462                 $wgOut->addHTML( "</ul>" );
 463                 // Explanation text
 464                 $this->addUsageText();
 465                 // Normal sysops can always see what they did, but can't always change it
 466                 if( !$UserAllowed ) return;
 467
 468                 $items = array(
 469                         Xml::inputLabel( wfMsg( 'revdelete-log' ), 'wpReason', 'wpReason', 60 ),
 470                         Xml::submitButton( wfMsg( 'revdelete-submit' ) )
 471                 );
 472                 $hidden = array(
 473                         Xml::hidden( 'wpEditToken', $wgUser->editToken() ),
 474                         Xml::hidden( 'target', $this->page->getPrefixedText() ),
 475                         Xml::hidden( 'type', $this->deleteKey )
 476                 );
 477                 if( $this->deleteKey == 'oldimage' ) {
 478                         $hidden[] = Xml::hidden( 'oldimage', implode(',',$this->oldimgs) );
 479                 } else {
 480                         $hidden[] = Xml::hidden( 'fileid', implode(',',$this->fileids) );
 481                 }
 482                 $special = SpecialPage::getTitleFor( 'Revisiondelete' );
 483                 $wgOut->addHTML(
 484                         Xml::openElement( 'form', array( 'method' => 'post',
 485                                 'action' => $special->getLocalUrl( 'action=submit' ),
 486                                 'id' => 'mw-revdel-form-filerevisions' )
 487                         ) .
 488                         Xml::fieldset( wfMsg( 'revdelete-legend' ) )
 489                 );
 490
 491                 $wgOut->addHTML( $this->buildCheckBoxes( $bitfields ) );
 492                 foreach( $items as $item ) {
 493                         $wgOut->addHTML( "<p>$item</p>" );
 494                 }
 495                 foreach( $hidden as $item ) {
 496                         $wgOut->addHTML( $item );
 497                 }
 498
 499                 $wgOut->addHTML(
 500                         Xml::closeElement( 'fieldset' ) .
 501                         Xml::closeElement( 'form' ) . "\n"
 502                 );
 503         }
 504
 505         /**
 506          * This lets a user set restrictions for log items
 507          */
 508         private function showLogItems() {
 509                 global $wgOut, $wgUser, $wgMessageCache, $wgLang;
 510                 $UserAllowed = true;
 511
 512                 $wgOut->addWikiMsg( 'logdelete-selected', $wgLang->formatNum( count($this->events) ) );
 513
 514                 $bitfields = 0;
 515                 $wgOut->addHTML( "<ul>" );
 516
 517                 $where = $logRows = array();
 518                 $dbr = wfGetDB( DB_MASTER );
 519                 // Run through and pull all our data in one query
 520                 $logItems = 0;
 521                 foreach( $this->events as $logid ) {
 522                         $where[] = intval($logid);
 523                 }
 524                 list($log,$logtype) = explode( '/',$this->page->getDBKey(), 2 );
 525                 $result = $dbr->select( 'logging', '*',
 526                         array(
 527                                 'log_type' => $logtype,
 528                                 'log_id' => $where ),
 529                         __METHOD__ );
 530                 while( $row = $dbr->fetchObject( $result ) ) {
 531                         $logRows[$row->log_id] = $row;
 532                 }
 533                 $wgMessageCache->loadAllMessages();
 534                 foreach( $this->events as $logid ) {
 535                         // Don't hide from oversight log!!!
 536                         if( !isset( $logRows[$logid] ) || $logRows[$logid]->log_type=='suppress' ) {
 537                                 continue;
 538                         } else if( !LogEventsList::userCan( $logRows[$logid],Revision::DELETED_RESTRICTED) ) {
 539                         // If an event is hidden from sysops
 540                                 if( !$this->wasPosted ) {
 541                                         $wgOut->permissionRequired( 'suppressrevision' );
 542                                         return;
 543                                 }
 544                                 $UserAllowed = false;
 545                         }
 546                         $logItems++;
 547                         $wgOut->addHTML( $this->logLine( $logRows[$logid] ) );
 548                         $bitfields |= $logRows[$logid]->log_deleted;
 549                 }
 550                 if( !$logItems ) {
 551                         $wgOut->showErrorPage( 'revdelete-nologid-title', 'revdelete-nologid-text' );
 552                         return;
 553                 }
 554
 555                 $wgOut->addHTML( "</ul>" );
 556                 // Explanation text
 557                 $this->addUsageText();
 558                 // Normal sysops can always see what they did, but can't always change it
 559                 if( !$UserAllowed ) return;
 560
 561                 $items = array(
 562                         Xml::inputLabel( wfMsg( 'revdelete-log' ), 'wpReason', 'wpReason', 60 ),
 563                         Xml::submitButton( wfMsg( 'revdelete-submit' ) ) );
 564                 $hidden = array(
 565                         Xml::hidden( 'wpEditToken', $wgUser->editToken() ),
 566                         Xml::hidden( 'target', $this->page->getPrefixedDBKey() ),
 567                         Xml::hidden( 'page', $this->contextPage ? $this->contextPage->getPrefixedDBKey() : '' ),
 568                         Xml::hidden( 'type', $this->deleteKey ),
 569                         Xml::hidden( 'logid', implode(',',$this->logids) )
 570                 );
 571
 572                 $special = SpecialPage::getTitleFor( 'Revisiondelete' );
 573                 $wgOut->addHTML(
 574                         Xml::openElement( 'form', array( 'method' => 'post',
 575                                 'action' => $special->getLocalUrl( 'action=submit' ), 'id' => 'mw-revdel-form-logs' ) ) .
 576                         Xml::fieldset( wfMsg( 'revdelete-legend' ) )
 577                 );
 578
 579                 $wgOut->addHTML( $this->buildCheckBoxes( $bitfields ) );
 580                 foreach( $items as $item ) {
 581                         $wgOut->addHTML( "<p>$item</p>" );
 582                 }
 583                 foreach( $hidden as $item ) {
 584                         $wgOut->addHTML( $item );
 585                 }
 586
 587                 $wgOut->addHTML(
 588                         Xml::closeElement( 'fieldset' ) .
 589                         Xml::closeElement( 'form' ) . "\n"
 590                 );
 591         }
 592
 593         private function addUsageText() {
 594                 global $wgOut, $wgUser;
 595                 $wgOut->addWikiMsg( 'revdelete-text' );
 596                 if( $wgUser->isAllowed( 'suppressrevision' ) ) {
 597                         $wgOut->addWikiMsg( 'revdelete-suppress-text' );
 598                 }
 599         }
 600
 601         /**
 602         * @param int $bitfields, aggregate bitfield of all the bitfields
 603         * @returns string HTML
 604         */
 605         private function buildCheckBoxes( $bitfields ) {
 606                 $html = '';
 607                 // FIXME: all items checked for just one rev are checked, even if not set for the others
 608                 foreach( $this->checks as $item ) {
 609                         list( $message, $name, $field ) = $item;
 610                         $line = Xml::tags( 'div', null, Xml::checkLabel( wfMsg($message), $name, $name,
 611                                 $bitfields & $field ) );
 612                         if( $field == Revision::DELETED_RESTRICTED ) $line = "<b>$line</b>";
 613                         $html .= $line;
 614                 }
 615                 return $html;
 616         }
 617
 618         /**
 619          * @param Revision $rev
 620          * @returns string
 621          */
 622         private function historyLine( $rev ) {
 623                 global $wgLang, $wgUser;
 624
 625                 $date = $wgLang->timeanddate( $rev->getTimestamp() );
 626                 $difflink = $del = '';
 627                 // Live revisions
 628                 if( $this->deleteKey == 'oldid' ) {
 629                         $tokenParams = '&unhide=1&token='.urlencode( $wgUser->editToken( $rev->getId() ) );
 630                         $revlink = $this->skin->makeLinkObj( $this->page, $date, 'oldid='.$rev->getId() . $tokenParams );
 631                         $difflink = '(' . $this->skin->makeKnownLinkObj( $this->page, wfMsgHtml('diff'),
 632                                 'diff=' . $rev->getId() . '&oldid=prev' . $tokenParams ) . ')';
 633                 // Archived revisions
 634                 } else {
 635                         $undelete = SpecialPage::getTitleFor( 'Undelete' );
 636                         $target = $this->page->getPrefixedText();
 637                         $revlink = $this->skin->makeLinkObj( $undelete, $date,
 638                                 "target=$target&timestamp=" . $rev->getTimestamp() );
 639                         $difflink = '(' . $this->skin->makeKnownLinkObj( $undelete, wfMsgHtml('diff'),
 640                                 "target=$target&diff=prev&timestamp=" . $rev->getTimestamp() ) . ')';
 641                 }
 642                 // Check permissions; items may be "suppressed"
 643                 if( $rev->isDeleted(Revision::DELETED_TEXT) ) {
 644                         $revlink = '<span class="history-deleted">'.$revlink.'</span>';
 645                         $del = ' <tt>' . wfMsgHtml( 'deletedrev' ) . '</tt>';
 646                         if( !$rev->userCan(Revision::DELETED_TEXT) ) {
 647                                 $revlink = '<span class="history-deleted">'.$date.'</span>';
 648                                 $difflink = '(' . wfMsgHtml('diff') . ')';
 649                         }
 650                 }
 651                 $userlink = $this->skin->revUserLink( $rev );
 652                 $comment = $this->skin->revComment( $rev );
 653
 654                 return "<li>$difflink $revlink $userlink $comment{$del}</li>";
 655         }
 656
 657         /**
 658          * @param File $file
 659          * @returns string
 660          */
 661         private function fileLine( $file ) {
 662                 global $wgLang, $wgTitle;
 663
 664                 $target = $this->page->getPrefixedText();
 665                 $date = $wgLang->timeanddate( $file->getTimestamp(), true  );
 666
 667                 $del = '';
 668                 # Hidden files...
 669                 if( $file->isDeleted(File::DELETED_FILE) ) {
 670                         $del = ' <tt>' . wfMsgHtml( 'deletedrev' ) . '</tt>';
 671                         if( !$file->userCan(File::DELETED_FILE) ) {
 672                                 $pageLink = $date;
 673                         } else {
 674                                 $pageLink = $this->skin->makeKnownLinkObj( $wgTitle, $date,
 675                                         "target=$target&file=$file->sha1.".$file->getExtension() );
 676                         }
 677                         $pageLink = '<span class="history-deleted">' . $pageLink . '</span>';
 678                 # Regular files...
 679                 } else {
 680                         $url = $file->getUrlRel();
 681                         $pageLink = "<a href=\"{$url}\">{$date}</a>";
 682                 }
 683
 684                 $data = wfMsg( 'widthheight',
 685                                         $wgLang->formatNum( $file->getWidth() ),
 686                                         $wgLang->formatNum( $file->getHeight() ) ) .
 687                         ' (' . wfMsgExt( 'nbytes', 'parsemag', $wgLang->formatNum( $file->getSize() ) ) . ')';
 688                 $data = htmlspecialchars( $data );
 689
 690                 return "<li>$pageLink ".$this->fileUserTools( $file )." $data ".
 691                         $this->fileComment( $file )."$del</li>";
 692         }
 693
 694         /**
 695          * @param ArchivedFile $file
 696          * @returns string
 697          */
 698         private function archivedfileLine( $file ) {
 699                 global $wgLang;
 700
 701                 $target = $this->page->getPrefixedText();
 702                 $date = $wgLang->timeanddate( $file->getTimestamp(), true  );
 703
 704                 $undelete = SpecialPage::getTitleFor( 'Undelete' );
 705                 $pageLink = $this->skin->makeKnownLinkObj( $undelete, $date,
 706                         "target=$target&file={$file->getKey()}" );
 707
 708                 $del = '';
 709                 if( $file->isDeleted(File::DELETED_FILE) ) {
 710                         $del = ' <tt>' . wfMsgHtml( 'deletedrev' ) . '</tt>';
 711                 }
 712
 713                 $data = wfMsg( 'widthheight',
 714                                         $wgLang->formatNum( $file->getWidth() ),
 715                                         $wgLang->formatNum( $file->getHeight() ) ) .
 716                         ' (' . wfMsgExt( 'nbytes', 'parsemag', $wgLang->formatNum( $file->getSize() ) ) . ')';
 717                 $data = htmlspecialchars( $data );
 718
 719                 return "<li>$pageLink ".$this->fileUserTools( $file )." $data ".
 720                         $this->fileComment( $file )."$del</li>";
 721         }
 722
 723         /**
 724          * @param Array $row row
 725          * @returns string
 726          */
 727         private function logLine( $row ) {
 728                 global $wgLang;
 729
 730                 $date = $wgLang->timeanddate( $row->log_timestamp );
 731                 $paramArray = LogPage::extractParams( $row->log_params );
 732                 $title = Title::makeTitle( $row->log_namespace, $row->log_title );
 733
 734                 $logtitle = SpecialPage::getTitleFor( 'Log' );
 735                 $loglink = $this->skin->makeKnownLinkObj( $logtitle, wfMsgHtml( 'log' ),
 736                         wfArrayToCGI( array( 'page' => $title->getPrefixedUrl() ) ) );
 737                 // Action text
 738                 if( !LogEventsList::userCan($row,LogPage::DELETED_ACTION) ) {
 739                         $action = '<span class="history-deleted">' . wfMsgHtml('rev-deleted-event') . '</span>';
 740                 } else {
 741                         $action = LogPage::actionText( $row->log_type, $row->log_action, $title,
 742                                 $this->skin, $paramArray, true, true );
 743                         if( $row->log_deleted & LogPage::DELETED_ACTION )
 744                                 $action = '<span class="history-deleted">' . $action . '</span>';
 745                 }
 746                 // User links
 747                 $userLink = $this->skin->userLink( $row->log_user, User::WhoIs($row->log_user) );
 748                 if( LogEventsList::isDeleted($row,LogPage::DELETED_USER) ) {
 749                         $userLink = '<span class="history-deleted">' . $userLink . '</span>';
 750                 }
 751                 // Comment
 752                 $comment = $wgLang->getDirMark() . $this->skin->commentBlock( $row->log_comment );
 753                 if( LogEventsList::isDeleted($row,LogPage::DELETED_COMMENT) ) {
 754                         $comment = '<span class="history-deleted">' . $comment . '</span>';
 755                 }
 756                 return "<li>($loglink) $date $userLink $action $comment</li>";
 757         }
 758
 759         /**
 760          * Generate a user tool link cluster if the current user is allowed to view it
 761          * @param ArchivedFile $file
 762          * @return string HTML
 763          */
 764         private function fileUserTools( $file ) {
 765                 if( $file->userCan( Revision::DELETED_USER ) ) {
 766                         $link = $this->skin->userLink( $file->user, $file->user_text ) .
 767                                 $this->skin->userToolLinks( $file->user, $file->user_text );
 768                 } else {
 769                         $link = wfMsgHtml( 'rev-deleted-user' );
 770                 }
 771                 if( $file->isDeleted( Revision::DELETED_USER ) ) {
 772                         return '<span class="history-deleted">' . $link . '</span>';
 773                 }
 774                 return $link;
 775         }
 776
 777         /**
 778          * Wrap and format the given file's comment block, if the current
 779          * user is allowed to view it.
 780          *
 781          * @param ArchivedFile $file
 782          * @return string HTML
 783          */
 784         private function fileComment( $file ) {
 785                 if( $file->userCan( File::DELETED_COMMENT ) ) {
 786                         $block = $this->skin->commentBlock( $file->description );
 787                 } else {
 788                         $block = ' ' . wfMsgHtml( 'rev-deleted-comment' );
 789                 }
 790                 if( $file->isDeleted( File::DELETED_COMMENT ) ) {
 791                         return "<span class=\"history-deleted\">$block</span>";
 792                 }
 793                 return $block;
 794         }
 795
 796         /**
 797          * @param WebRequest $request
 798          */
 799         private function submit( $request ) {
 800                 global $wgUser, $wgOut;
 801                 # Check edit token on submission
 802                 if( $this->wasPosted && !$wgUser->matchEditToken( $request->getVal('wpEditToken') ) ) {
 803                         $wgOut->addWikiMsg( 'sessionfailure' );
 804                         return false;
 805                 }
 806                 $bitfield = $this->extractBitfield( $request );
 807                 $comment = $request->getText( 'wpReason' );
 808                 # Can the user set this field?
 809                 if( $bitfield & Revision::DELETED_RESTRICTED && !$wgUser->isAllowed('suppressrevision') ) {
 810                         $wgOut->permissionRequired( 'suppressrevision' );
 811                         return false;
 812                 }
 813                 # If the save went through, go to success message...
 814                 if( $this->save( $bitfield, $comment, $this->page ) ) {
 815                         $this->success();
 816                         return true;
 817                 # ...otherwise, bounce back to form...
 818                 } else {
 819                         $this->failure();
 820                 }
 821                 return false;
 822         }
 823
 824         private function success() {
 825                 global $wgOut;
 826                 $wgOut->setPagetitle( wfMsg( 'actioncomplete' ) );
 827                 $wrap = '<span class="success">$1</span>';
 828                 if( $this->deleteKey == 'logid' ) {
 829                         $wgOut->wrapWikiMsg( $wrap, 'logdelete-success' );
 830                         $this->showLogItems();
 831                 } else if( $this->deleteKey == 'oldid' || $this->deleteKey == 'artimestamp' ) {
 832                         $wgOut->wrapWikiMsg( $wrap, 'revdelete-success' );
 833                         $this->showRevs();
 834                 } else if( $this->deleteKey == 'fileid' ) {
 835                         $wgOut->wrapWikiMsg( $wrap, 'revdelete-success' );
 836                         $this->showImages();
 837                 } else if( $this->deleteKey == 'oldimage' ) {
 838                         $wgOut->wrapWikiMsg( $wrap, 'revdelete-success' );
 839                         $this->showImages();
 840                 }
 841         }
 842
 843         private function failure() {
 844                 global $wgOut;
 845                 $wgOut->setPagetitle( wfMsg( 'actioncomplete' ) );
 846                 $wrap = '<span class="error">$1</span>';
 847                 if( $this->deleteKey == 'logid' ) {
 848                         $this->showLogItems();
 849                 } else if( $this->deleteKey == 'oldid' || $this->deleteKey == 'artimestamp' ) {
 850                         $wgOut->wrapWikiMsg( $wrap, 'revdelete-failure' );
 851                         $this->showRevs();
 852                 } else if( $this->deleteKey == 'fileid' ) {
 853                         $wgOut->wrapWikiMsg( $wrap, 'revdelete-failure' );
 854                         $this->showImages();
 855                 } else if( $this->deleteKey == 'oldimage' ) {
 856                         $wgOut->wrapWikiMsg( $wrap, 'revdelete-failure' );
 857                         $this->showImages();
 858                 }
 859         }
 860
 861         /**
 862          * Put together a rev_deleted bitfield from the submitted checkboxes
 863          * @param WebRequest $request
 864          * @return int
 865          */
 866         private function extractBitfield( $request ) {
 867                 $bitfield = 0;
 868                 foreach( $this->checks as $item ) {
 869                         list( /* message */ , $name, $field ) = $item;
 870                         if( $request->getCheck( $name ) ) {
 871                                 $bitfield |= $field;
 872                         }
 873                 }
 874                 return $bitfield;
 875         }
 876
 877         private function save( $bitfield, $reason, $title ) {
 878                 $dbw = wfGetDB( DB_MASTER );
 879                 // Don't allow simply locking the interface for no reason
 880                 if( $bitfield == Revision::DELETED_RESTRICTED ) {
 881                         $bitfield = 0;
 882                 }
 883                 $deleter = new RevisionDeleter( $dbw );
 884                 // By this point, only one of the below should be set
 885                 if( isset($this->revisions) ) {
 886                         return $deleter->setRevVisibility( $title, $this->revisions, $bitfield, $reason );
 887                 } else if( isset($this->archrevs) ) {
 888                         return $deleter->setArchiveVisibility( $title, $this->archrevs, $bitfield, $reason );
 889                 } else if( isset($this->ofiles) ) {
 890                         return $deleter->setOldImgVisibility( $title, $this->ofiles, $bitfield, $reason );
 891                 } else if( isset($this->afiles) ) {
 892                         return $deleter->setArchFileVisibility( $title, $this->afiles, $bitfield, $reason );
 893                 } else if( isset($this->events) ) {
 894                         return $deleter->setEventVisibility( $title, $this->events, $bitfield, $reason );
 895                 }
 896                 return false;
 897         }
 898 }
 899
 900 /**
 901  * Implements the actions for Revision Deletion.
 902  * @ingroup SpecialPage
 903  */
 904 class RevisionDeleter {
 905         function __construct( $db ) {
 906                 $this->dbw = $db;
 907         }
 908
 909         /**
 910          * @param $title, the page these events apply to
 911          * @param array $items list of revision ID numbers
 912          * @param int $bitfield new rev_deleted value
 913          * @param string $comment Comment for log records
 914          */
 915         function setRevVisibility( $title, $items, $bitfield, $comment ) {
 916                 global $wgOut;
 917
 918                 $userAllowedAll = $success = true;
 919                 $revIDs = array();
 920                 $revCount = 0;
 921                 // Run through and pull all our data in one query
 922                 foreach( $items as $revid ) {
 923                         $where[] = intval($revid);
 924                 }
 925                 $result = $this->dbw->select( array('revision','page'), '*',
 926                         array( 'rev_page' => $title->getArticleID(),
 927                                 'rev_id' => $where, 'rev_page = page_id' ),
 928                         __METHOD__
 929                 );
 930                 while( $row = $this->dbw->fetchObject( $result ) ) {
 931                         $revObjs[$row->rev_id] = new Revision( $row );
 932                 }
 933                 // To work!
 934                 foreach( $items as $revid ) {
 935                         if( !isset($revObjs[$revid]) ) {
 936                                 $success = false;
 937                                 continue; // Must exist
 938                         } else if( $revObjs[$revid]->isCurrent() && ($bitfield & Revision::DELETED_TEXT) ) {
 939                                 $success = false;
 940                                 continue; // Cannot hide current version text
 941                         } else if( !$revObjs[$revid]->userCan(Revision::DELETED_RESTRICTED) ) {
 942                         $userAllowedAll = false;
 943                                 continue;
 944                         }
 945                         // For logging, maintain a count of revisions
 946                         if( $revObjs[$revid]->mDeleted != $bitfield ) {
 947                                 $revIDs[] = $revid;
 948                                 $this->updateRevision( $revObjs[$revid], $bitfield );
 949                                 $this->updateRecentChangesEdits( $revObjs[$revid], $bitfield, false );
 950                                 $revCount++;
 951                         }
 952                 }
 953                 // Clear caches...
 954                 // Don't log or touch if nothing changed
 955                 if( $revCount > 0 ) {
 956                         $this->updateLog( $title, $revCount, $bitfield, $revObjs[$revid]->mDeleted,
 957                                 $comment, $title, 'oldid', $revIDs );
 958                         $this->updatePage( $title );
 959                 }
 960                 // Where all revs allowed to be set?
 961                 if( !$userAllowedAll ) {
 962                         //FIXME: still might be confusing???
 963                         $wgOut->permissionRequired( 'suppressrevision' );
 964                         return false;
 965                 }
 966
 967                 return $success;
 968         }
 969
 970          /**
 971          * @param $title, the page these events apply to
 972          * @param array $items list of revision ID numbers
 973          * @param int $bitfield new rev_deleted value
 974          * @param string $comment Comment for log records
 975          */
 976         function setArchiveVisibility( $title, $items, $bitfield, $comment ) {
 977                 global $wgOut;
 978
 979                 $userAllowedAll = $success = true;
 980                 $count = 0;
 981                 $Id_set = array();
 982                 // Run through and pull all our data in one query
 983                 foreach( $items as $timestamp ) {
 984                         $where[] = $this->dbw->timestamp( $timestamp );
 985                 }
 986                 $result = $this->dbw->select( 'archive', '*',
 987                         array(
 988                                 'ar_namespace' => $title->getNamespace(),
 989                                 'ar_title' => $title->getDBKey(),
 990                                 'ar_timestamp' => $where ),
 991                         __METHOD__ );
 992                 while( $row = $this->dbw->fetchObject( $result ) ) {
 993                         $timestamp = wfTimestamp( TS_MW, $row->ar_timestamp );
 994                         $revObjs[$timestamp] = new Revision( array(
 995                                 'page'       => $title->getArticleId(),
 996                                 'id'         => $row->ar_rev_id,
 997                                 'text'       => $row->ar_text_id,
 998                                 'comment'    => $row->ar_comment,
 999                                 'user'       => $row->ar_user,
1000                                 'user_text'  => $row->ar_user_text,
1001                                 'timestamp'  => $timestamp,
1002                                 'minor_edit' => $row->ar_minor_edit,
1003                                 'text_id'    => $row->ar_text_id,
1004                                 'deleted'    => $row->ar_deleted,
1005                                 'len'        => $row->ar_len) );
1006                 }
1007                 // To work!
1008                 foreach( $items as $timestamp ) {
1009                         // This will only select the first revision with this timestamp.
1010                         // Since they are all selected/deleted at once, we can just check the
1011                         // permissions of one. UPDATE is done via timestamp, so all revs are set.
1012                         if( !is_object($revObjs[$timestamp]) ) {
1013                                 $success = false;
1014                                 continue; // Must exist
1015                         } else if( !$revObjs[$timestamp]->userCan(Revision::DELETED_RESTRICTED) ) {
1016                         $userAllowedAll=false;
1017                                 continue;
1018                         }
1019                         // Which revisions did we change anything about?
1020                         if( $revObjs[$timestamp]->mDeleted != $bitfield ) {
1021                            $Id_set[]=$timestamp;
1022                            $count++;
1023
1024                            $this->updateArchive( $revObjs[$timestamp], $title, $bitfield );
1025                         }
1026                 }
1027                 // For logging, maintain a count of revisions
1028                 if( $count > 0 ) {
1029                         $this->updateLog( $title, $count, $bitfield, $revObjs[$timestamp]->mDeleted,
1030                                 $comment, $title, 'artimestamp', $Id_set );
1031                 }
1032                 // Where all revs allowed to be set?
1033                 if( !$userAllowedAll ) {
1034                         $wgOut->permissionRequired( 'suppressrevision' );
1035                         return false;
1036                 }
1037
1038                 return $success;
1039         }
1040
1041          /**
1042          * @param $title, the page these events apply to
1043          * @param array $items list of revision ID numbers
1044          * @param int $bitfield new rev_deleted value
1045          * @param string $comment Comment for log records
1046          */
1047         function setOldImgVisibility( $title, $items, $bitfield, $comment ) {
1048                 global $wgOut;
1049
1050                 $userAllowedAll = $success = true;
1051                 $count = 0;
1052                 $set = array();
1053                 // Run through and pull all our data in one query
1054                 foreach( $items as $timestamp ) {
1055                         $where[] = $timestamp.'!'.$title->getDBKey();
1056                 }
1057                 $result = $this->dbw->select( 'oldimage', '*',
1058                         array(
1059                                 'oi_name' => $title->getDBKey(),
1060                                 'oi_archive_name' => $where ),
1061                         __METHOD__ );
1062                 while( $row = $this->dbw->fetchObject( $result ) ) {
1063                         $filesObjs[$row->oi_archive_name] = RepoGroup::singleton()->getLocalRepo()->newFileFromRow( $row );
1064                         $filesObjs[$row->oi_archive_name]->user = $row->oi_user;
1065                         $filesObjs[$row->oi_archive_name]->user_text = $row->oi_user_text;
1066                 }
1067                 // To work!
1068                 foreach( $items as $timestamp ) {
1069                         $archivename = $timestamp.'!'.$title->getDBKey();
1070                         if( !isset($filesObjs[$archivename]) ) {
1071                                 $success = false;
1072                                 continue; // Must exist
1073                         } else if( !$filesObjs[$archivename]->userCan(File::DELETED_RESTRICTED) ) {
1074                         $userAllowedAll=false;
1075                                 continue;
1076                         }
1077
1078                         $transaction = true;
1079                         // Which revisions did we change anything about?
1080                         if( $filesObjs[$archivename]->deleted != $bitfield ) {
1081                                 $count++;
1082
1083                                 $this->dbw->begin();
1084                                 $this->updateOldFiles( $filesObjs[$archivename], $bitfield );
1085                                 // If this image is currently hidden...
1086                                 if( $filesObjs[$archivename]->deleted & File::DELETED_FILE ) {
1087                                         if( $bitfield & File::DELETED_FILE ) {
1088                                                 # Leave it alone if we are not changing this...
1089                                                 $set[]=$timestamp;
1090                                                 $transaction = true;
1091                                         } else {
1092                                                 # We are moving this out
1093                                                 $transaction = $this->makeOldImagePublic( $filesObjs[$archivename] );
1094                                                 $set[]=$transaction;
1095                                         }
1096                                 // Is it just now becoming hidden?
1097                                 } else if( $bitfield & File::DELETED_FILE ) {
1098                                         $transaction = $this->makeOldImagePrivate( $filesObjs[$archivename] );
1099                                         $set[]=$transaction;
1100                                 } else {
1101                                         $set[]=$timestamp;
1102                                 }
1103                                 // If our file operations fail, then revert back the db
1104                                 if( $transaction==false ) {
1105                                         $this->dbw->rollback();
1106                                         return false;
1107                                 }
1108                                 $this->dbw->commit();
1109                         }
1110                 }
1111
1112                 // Log if something was changed
1113                 if( $count > 0 ) {
1114                         $this->updateLog( $title, $count, $bitfield, $filesObjs[$archivename]->deleted,
1115                                 $comment, $title, 'oldimage', $set );
1116                         # Purge page/history
1117                         $file = wfLocalFile( $title );
1118                         $file->purgeCache();
1119                         $file->purgeHistory();
1120                         # Invalidate cache for all pages using this file
1121                         $update = new HTMLCacheUpdate( $title, 'imagelinks' );
1122                         $update->doUpdate();
1123                 }
1124                 // Where all revs allowed to be set?
1125                 if( !$userAllowedAll ) {
1126                         $wgOut->permissionRequired( 'suppressrevision' );
1127                         return false;
1128                 }
1129
1130                 return $success;
1131         }
1132
1133          /**
1134          * @param $title, the page these events apply to
1135          * @param array $items list of revision ID numbers
1136          * @param int $bitfield new rev_deleted value
1137          * @param string $comment Comment for log records
1138          */
1139         function setArchFileVisibility( $title, $items, $bitfield, $comment ) {
1140                 global $wgOut;
1141
1142                 $userAllowedAll = $success = true;
1143                 $count = 0;
1144                 $Id_set = array();
1145
1146                 // Run through and pull all our data in one query
1147                 foreach( $items as $id ) {
1148                         $where[] = intval($id);
1149                 }
1150                 $result = $this->dbw->select( 'filearchive', '*',
1151                         array( 'fa_name' => $title->getDBKey(),
1152                                 'fa_id' => $where ),
1153                         __METHOD__ );
1154                 while( $row = $this->dbw->fetchObject( $result ) ) {
1155                         $filesObjs[$row->fa_id] = ArchivedFile::newFromRow( $row );
1156                 }
1157                 // To work!
1158                 foreach( $items as $fileid ) {
1159                         if( !isset($filesObjs[$fileid]) ) {
1160                                 $success = false;
1161                                 continue; // Must exist
1162                         } else if( !$filesObjs[$fileid]->userCan(File::DELETED_RESTRICTED) ) {
1163                         $userAllowedAll=false;
1164                                 continue;
1165                         }
1166                         // Which revisions did we change anything about?
1167                         if( $filesObjs[$fileid]->deleted != $bitfield ) {
1168                            $Id_set[]=$fileid;
1169                            $count++;
1170
1171                            $this->updateArchFiles( $filesObjs[$fileid], $bitfield );
1172                         }
1173                 }
1174                 // Log if something was changed
1175                 if( $count > 0 ) {
1176                         $this->updateLog( $title, $count, $bitfield, $comment,
1177                                 $filesObjs[$fileid]->deleted, $title, 'fileid', $Id_set );
1178                 }
1179                 // Where all revs allowed to be set?
1180                 if( !$userAllowedAll ) {
1181                         $wgOut->permissionRequired( 'suppressrevision' );
1182                         return false;
1183                 }
1184
1185                 return $success;
1186         }
1187
1188         /**
1189          * @param $title, the log page these events apply to
1190          * @param array $items list of log ID numbers
1191          * @param int $bitfield new log_deleted value
1192          * @param string $comment Comment for log records
1193          */
1194         function setEventVisibility( $title, $items, $bitfield, $comment ) {
1195                 global $wgOut;
1196
1197                 $userAllowedAll = $success = true;
1198                 $count = 0;
1199                 $log_Ids = array();
1200
1201                 // Run through and pull all our data in one query
1202                 foreach( $items as $logid ) {
1203                         $where[] = intval($logid);
1204                 }
1205                 list($log,$logtype) = explode( '/',$title->getDBKey(), 2 );
1206                 $result = $this->dbw->select( 'logging', '*',
1207                         array( 'log_type' => $logtype, 'log_id' => $where ),
1208                         __METHOD__
1209                 );
1210                 while( $row = $this->dbw->fetchObject( $result ) ) {
1211                         $logRows[$row->log_id] = $row;
1212                 }
1213                 // To work!
1214                 foreach( $items as $logid ) {
1215                         if( !isset($logRows[$logid]) ) {
1216                                 $success = false;
1217                                 continue; // Must exist
1218                         } else if( !LogEventsList::userCan($logRows[$logid], LogPage::DELETED_RESTRICTED)
1219                                 || $logRows[$logid]->log_type == 'suppress' )
1220                         {
1221                         $userAllowedAll=false; // Don't hide from oversight log!!!
1222                         continue;
1223                         }
1224                         // Which logs did we change anything about?
1225                         if( $logRows[$logid]->log_deleted != $bitfield ) {
1226                                 $log_Ids[] = $logid;
1227                                 $this->updateLogs( $logRows[$logid], $bitfield );
1228                                 $this->updateRecentChangesLog( $logRows[$logid], $bitfield );
1229                                 $count++;
1230                         }
1231                 }
1232                 // Don't log or touch if nothing changed
1233                 if( $count > 0 ) {
1234                         $this->updateLog( $title, $count, $bitfield, $logRows[$logid]->log_deleted,
1235                                 $comment, $title, 'logid', $log_Ids );
1236                 }
1237                 // Were all revs allowed to be set?
1238                 if( !$userAllowedAll ) {
1239                         $wgOut->permissionRequired( 'suppressrevision' );
1240                         return false;
1241                 }
1242
1243                 return $success;
1244         }
1245
1246         /**
1247          * Moves an image to a safe private location
1248          * Caller is responsible for clearing caches
1249          * @param File $oimage
1250          * @returns mixed, timestamp string on success, false on failure
1251          */
1252         function makeOldImagePrivate( $oimage ) {
1253                 $transaction = new FSTransaction();
1254                 if( !FileStore::lock() ) {
1255                         wfDebug( __METHOD__.": failed to acquire file store lock, aborting\n" );
1256                         return false;
1257                 }
1258                 $oldpath = $oimage->getArchivePath() . DIRECTORY_SEPARATOR . $oimage->archive_name;
1259                 // Dupe the file into the file store
1260                 if( file_exists( $oldpath ) ) {
1261                         // Is our directory configured?
1262                         if( $store = FileStore::get( 'deleted' ) ) {
1263                                 if( !$oimage->sha1 ) {
1264                                         $oimage->upgradeRow(); // sha1 may be missing
1265                                 }
1266                                 $key = $oimage->sha1 . '.' . $oimage->getExtension();
1267                                 $transaction->add( $store->insert( $key, $oldpath, FileStore::DELETE_ORIGINAL ) );
1268                         } else {
1269                                 $group = null;
1270                                 $key = null;
1271                                 $transaction = false; // Return an error and do nothing
1272                         }
1273                 } else {
1274                         wfDebug( __METHOD__." deleting already-missing '$oldpath'; moving on to database\n" );
1275                         $group = null;
1276                         $key = '';
1277                         $transaction = new FSTransaction(); // empty
1278                 }
1279
1280                 if( $transaction === false ) {
1281                         // Fail to restore?
1282                         wfDebug( __METHOD__.": import to file store failed, aborting\n" );
1283                         throw new MWException( "Could not archive and delete file $oldpath" );
1284                         return false;
1285                 }
1286
1287                 wfDebug( __METHOD__.": set db items, applying file transactions\n" );
1288                 $transaction->commit();
1289                 FileStore::unlock();
1290
1291                 $m = explode('!',$oimage->archive_name,2);
1292                 $timestamp = $m[0];
1293
1294                 return $timestamp;
1295         }
1296
1297         /**
1298          * Moves an image from a safe private location
1299          * Caller is responsible for clearing caches
1300          * @param File $oimage
1301          * @returns mixed, string timestamp on success, false on failure
1302          */
1303         function makeOldImagePublic( $oimage ) {
1304                 $transaction = new FSTransaction();
1305                 if( !FileStore::lock() ) {
1306                         wfDebug( __METHOD__." could not acquire filestore lock\n" );
1307                         return false;
1308                 }
1309
1310                 $store = FileStore::get( 'deleted' );
1311                 if( !$store ) {
1312                         wfDebug( __METHOD__.": skipping row with no file.\n" );
1313                         return false;
1314                 }
1315
1316                 $key = $oimage->sha1.'.'.$oimage->getExtension();
1317                 $destDir = $oimage->getArchivePath();
1318                 if( !is_dir( $destDir ) ) {
1319                         wfMkdirParents( $destDir );
1320                 }
1321                 $destPath = $destDir . DIRECTORY_SEPARATOR . $oimage->archive_name;
1322                 // Check if any other stored revisions use this file;
1323                 // if so, we shouldn't remove the file from the hidden
1324                 // archives so they will still work. Check hidden files first.
1325                 $useCount = $this->dbw->selectField( 'oldimage', '1',
1326                         array( 'oi_sha1' => $oimage->sha1,
1327                                 'oi_deleted & '.File::DELETED_FILE => File::DELETED_FILE ),
1328                         __METHOD__, array( 'FOR UPDATE' ) );
1329                 // Check the rest of the deleted archives too.
1330                 // (these are the ones that don't show in the image history)
1331                 if( !$useCount ) {
1332                         $useCount = $this->dbw->selectField( 'filearchive', '1',
1333                                 array( 'fa_storage_group' => 'deleted', 'fa_storage_key' => $key ),
1334                                 __METHOD__, array( 'FOR UPDATE' ) );
1335                 }
1336
1337                 if( $useCount == 0 ) {
1338                         wfDebug( __METHOD__.": nothing else using {$oimage->sha1}, will deleting after\n" );
1339                         $flags = FileStore::DELETE_ORIGINAL;
1340                 } else {
1341                         $flags = 0;
1342                 }
1343                 $transaction->add( $store->export( $key, $destPath, $flags ) );
1344
1345                 wfDebug( __METHOD__.": set db items, applying file transactions\n" );
1346                 $transaction->commit();
1347                 FileStore::unlock();
1348
1349                 $m = explode('!',$oimage->archive_name,2);
1350                 $timestamp = $m[0];
1351
1352                 return $timestamp;
1353         }
1354
1355         /**
1356          * Update the revision's rev_deleted field
1357          * @param Revision $rev
1358          * @param int $bitfield new rev_deleted bitfield value
1359          */
1360         function updateRevision( $rev, $bitfield ) {
1361                 $this->dbw->update( 'revision',
1362                         array( 'rev_deleted' => $bitfield ),
1363                         array( 'rev_id' => $rev->getId(),
1364                                 'rev_page' => $rev->getPage() ),
1365                         __METHOD__ );
1366         }
1367
1368         /**
1369          * Update the revision's rev_deleted field
1370          * @param Revision $rev
1371          * @param Title $title
1372          * @param int $bitfield new rev_deleted bitfield value
1373          */
1374         function updateArchive( $rev, $title, $bitfield ) {
1375                 $this->dbw->update( 'archive',
1376                         array( 'ar_deleted' => $bitfield ),
1377                         array( 'ar_namespace' => $title->getNamespace(),
1378                                 'ar_title'     => $title->getDBKey(),
1379                                 'ar_timestamp' => $this->dbw->timestamp( $rev->getTimestamp() ),
1380                                 'ar_rev_id' => $rev->getId() ),
1381                         __METHOD__ );
1382         }
1383
1384         /**
1385          * Update the images's oi_deleted field
1386          * @param File $file
1387          * @param int $bitfield new rev_deleted bitfield value
1388          */
1389         function updateOldFiles( $file, $bitfield ) {
1390                 $this->dbw->update( 'oldimage',
1391                         array( 'oi_deleted' => $bitfield ),
1392                         array( 'oi_name' => $file->getName(),
1393                                 'oi_timestamp' => $this->dbw->timestamp( $file->getTimestamp() ) ),
1394                         __METHOD__ );
1395         }
1396
1397         /**
1398          * Update the images's fa_deleted field
1399          * @param ArchivedFile $file
1400          * @param int $bitfield new rev_deleted bitfield value
1401          */
1402         function updateArchFiles( $file, $bitfield ) {
1403                 $this->dbw->update( 'filearchive',
1404                         array( 'fa_deleted' => $bitfield ),
1405                         array( 'fa_id' => $file->getId() ),
1406                         __METHOD__ );
1407         }
1408
1409         /**
1410          * Update the logging log_deleted field
1411          * @param Row $row
1412          * @param int $bitfield new rev_deleted bitfield value
1413          */
1414         function updateLogs( $row, $bitfield ) {
1415                 $this->dbw->update( 'logging',
1416                         array( 'log_deleted' => $bitfield ),
1417                         array( 'log_id' => $row->log_id ),
1418                         __METHOD__ );
1419         }
1420
1421         /**
1422          * Update the revision's recentchanges record if fields have been hidden
1423          * @param Revision $rev
1424          * @param int $bitfield new rev_deleted bitfield value
1425          */
1426         function updateRecentChangesEdits( $rev, $bitfield ) {
1427                 $this->dbw->update( 'recentchanges',
1428                         array( 'rc_deleted' => $bitfield,
1429                                    'rc_patrolled' => 1 ),
1430                         array( 'rc_this_oldid' => $rev->getId(),
1431                                 'rc_timestamp' => $this->dbw->timestamp( $rev->getTimestamp() ) ),
1432                         __METHOD__ );
1433         }
1434
1435         /**
1436          * Update the revision's recentchanges record if fields have been hidden
1437          * @param Row $row
1438          * @param int $bitfield new rev_deleted bitfield value
1439          */
1440         function updateRecentChangesLog( $row, $bitfield ) {
1441                 $this->dbw->update( 'recentchanges',
1442                         array( 'rc_deleted' => $bitfield,
1443                                    'rc_patrolled' => 1 ),
1444                         array( 'rc_logid' => $row->log_id,
1445                                 'rc_timestamp' => $row->log_timestamp ),
1446                         __METHOD__ );
1447         }
1448
1449         /**
1450          * Touch the page's cache invalidation timestamp; this forces cached
1451          * history views to refresh, so any newly hidden or shown fields will
1452          * update properly.
1453          * @param Title $title
1454          */
1455         function updatePage( $title ) {
1456                 $title->invalidateCache();
1457                 $title->purgeSquid();
1458                 $title->touchLinks();
1459                 // Extensions that require referencing previous revisions may need this
1460                 wfRunHooks( 'ArticleRevisionVisiblitySet', array( &$title ) );
1461         }
1462
1463         /**
1464          * Checks for a change in the bitfield for a certain option and updates the
1465          * provided array accordingly.
1466          *
1467          * @param String $desc Description to add to the array if the option was
1468          * enabled / disabled.
1469          * @param int $field The bitmask describing the single option.
1470          * @param int $diff The xor of the old and new bitfields.
1471          * @param array $arr The array to update.
1472          */
1473         function checkItem( $desc, $field, $diff, $new, &$arr ) {
1474                 if( $diff & $field ) {
1475                         $arr[ ( $new & $field ) ? 0 : 1 ][] = $desc;
1476                 }
1477         }
1478
1479         /**
1480          * Gets an array describing the changes made to the visibilit of the revision.
1481          * If the resulting array is $arr, then $arr[0] will contain an array of strings
1482          * describing the items that were hidden, $arr[2] will contain an array of strings
1483          * describing the items that were unhidden, and $arr[3] will contain an array with
1484          * a single string, which can be one of "applied restrictions to sysops",
1485          * "removed restrictions from sysops", or null.
1486          *
1487          * @param int $n The new bitfield.
1488          * @param int $o The old bitfield.
1489          * @return An array as described above.
1490          */
1491         function getChanges( $n, $o ) {
1492                 $diff = $n ^ $o;
1493                 $ret = array( 0 => array(), 1 => array(), 2 => array() );
1494                 // Build bitfield changes in language
1495                 $this->checkItem( wfMsgForContent( 'revdelete-content' ),
1496                         Revision::DELETED_TEXT, $diff, $n, $ret );
1497                 $this->checkItem( wfMsgForContent( 'revdelete-summary' ),
1498                         Revision::DELETED_COMMENT, $diff, $n, $ret );
1499                 $this->checkItem( wfMsgForContent( 'revdelete-uname' ),
1500                         Revision::DELETED_USER, $diff, $n, $ret );
1501                 // Restriction application to sysops
1502                 if( $diff & Revision::DELETED_RESTRICTED ) {
1503                         if( $n & Revision::DELETED_RESTRICTED )
1504                                 $ret[2][] = wfMsgForContent( 'revdelete-restricted' );
1505                         else
1506                                 $ret[2][] = wfMsgForContent( 'revdelete-unrestricted' );
1507                 }
1508                 return $ret;
1509         }
1510
1511         /**
1512          * Gets a log message to describe the given revision visibility change. This
1513          * message will be of the form "[hid {content, edit summary, username}];
1514          * [unhid {...}][applied restrictions to sysops] for $count revisions: $comment".
1515          *
1516          * @param int $count The number of effected revisions.
1517          * @param int $nbitfield The new bitfield for the revision.
1518          * @param int $obitfield The old bitfield for the revision.
1519          * @param string $comment The comment associated with the change.
1520          * @param bool $isForLog
1521          */
1522         function getLogMessage( $count, $nbitfield, $obitfield, $comment, $isForLog = false ) {
1523                 global $wgContLang;
1524
1525                 $s = '';
1526                 $changes = $this->getChanges( $nbitfield, $obitfield );
1527
1528                 if( count( $changes[0] ) ) {
1529                         $s .= wfMsgForContent ( 'revdelete-hid', implode ( ', ', $changes[0] ) );
1530                 }
1531                 if( count( $changes[1] ) ) {
1532                         if ($s) $s .= '; ';
1533                         $s .= wfMsgForContent ( 'revdelete-unhid', implode ( ', ', $changes[1] ) );
1534                 }
1535                 if( count( $changes[2] ) ) {
1536                         $s .= $s ? ' (' . $changes[2][0] . ')' : $changes[2][0];
1537                 }
1538
1539                 $msg = $isForLog ? 'logdelete-log-message' : 'revdelete-log-message';
1540                 $ret = wfMsgExt ( $msg, array( 'parsemag', 'content' ),
1541                         $s, $wgContLang->formatNum( $count ) );
1542
1543                 if( $comment ) $ret .= ": $comment";
1544
1545                 return $ret;
1546
1547         }
1548
1549         /**
1550          * Record a log entry on the action
1551          * @param Title $title, page where item was removed from
1552          * @param int $count the number of revisions altered for this page
1553          * @param int $nbitfield the new _deleted value
1554          * @param int $obitfield the old _deleted value
1555          * @param string $comment
1556          * @param Title $target, the relevant page
1557          * @param string $param, URL param
1558          * @param Array $items
1559          */
1560         function updateLog( $title, $count, $nbitfield, $obitfield, $comment, $target,
1561                 $param, $items = array() )
1562         {
1563                 // Put things hidden from sysops in the oversight log
1564                 $logtype = ( ($nbitfield | $obitfield) & Revision::DELETED_RESTRICTED ) ?
1565                         'suppress' : 'delete';
1566                 $log = new LogPage( $logtype );
1567
1568                 $reason = $this->getLogMessage( $count, $nbitfield, $obitfield, $comment, $param == 'logid' );
1569
1570                 if( $param == 'logid' ) {
1571                         $params = array( implode( ',', $items) );
1572                         $log->addEntry( 'event', $title, $reason, $params );
1573                 } else {
1574                         // Add params for effected page and ids
1575                         $params = array( $param, implode( ',', $items) );
1576                         $log->addEntry( 'revision', $title, $reason, $params );
1577                 }
1578         }
1579 }