includes/specials/SpecialRevisiondelete.php

   1 <?php
   2 /**
   3  * Special page allowing users with the appropriate permissions to view
   4  * and hide revisions. Log items can also be hidden.
   5  *
   6  * @file
   7  * @ingroup SpecialPage
   8  */
   9
  10 class SpecialRevisionDelete extends UnlistedSpecialPage {
  11
  12         public function __construct() {
  13                 parent::__construct( 'Revisiondelete', 'deleterevision' );
  14                 $this->includable( false );
  15         }
  16
  17         public function execute( $par ) {
  18                 global $wgOut, $wgUser, $wgRequest;
  19                 if( wfReadOnly() ) {
  20                         $wgOut->readOnlyPage();
  21                         return;
  22                 }
  23                 if( !$wgUser->isAllowed( 'deleterevision' ) ) {
  24                         $wgOut->permissionRequired( 'deleterevision' );
  25                         return;
  26                 }
  27                 $this->skin =& $wgUser->getSkin();
  28                 # Set title and such
  29                 $this->setHeaders();
  30                 $this->outputHeader();
  31                 $this->wasPosted = $wgRequest->wasPosted();
  32                 # Handle our many different possible input types
  33                 $this->target = $wgRequest->getText( 'target' );
  34                 $this->oldids = $wgRequest->getArray( 'oldid' );
  35                 $this->artimestamps = $wgRequest->getArray( 'artimestamp' );
  36                 $this->logids = $wgRequest->getArray( 'logid' );
  37                 $this->oldimgs = $wgRequest->getArray( 'oldimage' );
  38                 $this->fileids = $wgRequest->getArray( 'fileid' );
  39                 # For reviewing deleted files...
  40                 $this->file = $wgRequest->getVal( 'file' );
  41                 # Only one target set at a time please!
  42                 $i = (bool)$this->file + (bool)$this->oldids + (bool)$this->logids
  43                         + (bool)$this->artimestamps + (bool)$this->fileids + (bool)$this->oldimgs;
  44                 if( $i !== 1 ) {
  45                         $wgOut->showErrorPage( 'revdelete-toomanytargets-title', 'revdelete-toomanytargets-text' );
  46                         return;
  47                 }
  48                 $this->page = Title::newFromUrl( $this->target );
  49                 # If this is just one revision, get the title from it.
  50                 # This allows for more flexibility with page moves...
  51                 if( count($this->oldids) === 1 ) {
  52                         $rev = Revision::newFromId( $this->oldids[0] );
  53                         $this->page = $rev ? $rev->getTitle() : $this->page;
  54                 }
  55                 # We need a target page!
  56                 if( is_null($this->page) ) {
  57                         $wgOut->addWikiMsg( 'undelete-header' );
  58                         return;
  59                 }
  60                 # Logs must have a type given
  61                 if( $this->logids && !strpos($this->page->getDBKey(),'/') ) {
  62                         $wgOut->showErrorPage( 'revdelete-nologtype-title', 'revdelete-nologtype-text' );
  63                         return;
  64                 }
  65                 # Check edit token on submission
  66                 if( $this->wasPosted && !$wgUser->matchEditToken( $wgRequest->getVal('wpEditToken') ) ) {
  67                         $wgOut->addWikiMsg( 'sessionfailure' );
  68                         return;
  69                 }
  70                 # For reviewing deleted files...show it now if allowed
  71                 if( $this->file ) {
  72                         $oimage = RepoGroup::singleton()->getLocalRepo()->newFromArchiveName( $this->page, $this->file );
  73                         $oimage->load();
  74                         // Check if user is allowed to see this file
  75                         if( !$oimage->userCan(File::DELETED_FILE) ) {
  76                                 $wgOut->permissionRequired( 'suppressrevision' );
  77                         } else {
  78                                 $this->showFile( $this->file );
  79                         }
  80                         return;
  81                 }
  82                 # Give a link to the logs/hist for this page
  83                 if( !is_null($this->page) && $this->page->getNamespace() > -1 ) {
  84                         $links = array();
  85
  86                         $logtitle = SpecialPage::getTitleFor( 'Log' );
  87                         $links[] = $this->skin->makeKnownLinkObj( $logtitle, wfMsgHtml( 'viewpagelogs' ),
  88                                 wfArrayToCGI( array( 'page' => $this->page->getPrefixedUrl() ) ) );
  89                         # Give a link to the page history
  90                         $links[] = $this->skin->makeKnownLinkObj( $this->page, wfMsgHtml( 'pagehist' ),
  91                                 wfArrayToCGI( array( 'action' => 'history' ) ) );
  92                         # Link to deleted edits
  93                         if( $wgUser->isAllowed('undelete') ) {
  94                                 $undelete = SpecialPage::getTitleFor( 'Undelete' );
  95                                 $links[] = $this->skin->makeKnownLinkObj( $undelete, wfMsgHtml( 'deletedhist' ),
  96                                         wfArrayToCGI( array( 'target' => $this->page->getPrefixedDBkey() ) ) );
  97                         }
  98                         # Logs themselves don't have histories or archived revisions
  99                         $wgOut->setSubtitle( '<p>'.implode($links,' / ').'</p>' );
 100                 }
 101                 # Lock the operation and the form context
 102                 $this->secureOperation();
 103                 # Either submit or create our form
 104                 if( $this->wasPosted ) {
 105                         $this->submit( $wgRequest );
 106                 } else if( $this->deleteKey == 'oldid' || $this->deleteKey == 'artimestamp' ) {
 107                         $this->showRevs();
 108                 } else if( $this->deleteKey == 'fileid' || $this->deleteKey == 'oldimage' ) {
 109                         $this->showImages();
 110                 } else if( $this->deleteKey == 'logid' ) {
 111                         $this->showLogItems();
 112                 }
 113                 # Show relevant lines from the deletion log. This will show even if said ID
 114                 # does not exist...might be helpful
 115                 $wgOut->addHTML( "<h2>" . htmlspecialchars( LogPage::logName( 'delete' ) ) . "</h2>\n" );
 116                 LogEventsList::showLogExtract( $wgOut, 'delete', $this->page->getPrefixedText() );
 117                 if( $wgUser->isAllowed( 'suppressionlog' ) ){
 118                         $wgOut->addHTML( "<h2>" . htmlspecialchars( LogPage::logName( 'suppress' ) ) . "</h2>\n" );
 119                         LogEventsList::showLogExtract( $wgOut, 'suppress', $this->page->getPrefixedText() );
 120                 }
 121         }
 122
 123         private function secureOperation() {
 124                 global $wgUser;
 125                 $this->deleteKey = '';
 126                 // At this point, we should only have one of these
 127                 if( $this->oldids ) {
 128                         $this->revisions = $this->oldids;
 129                         $hide_content_name = array( 'revdelete-hide-text', 'wpHideText', Revision::DELETED_TEXT );
 130                         $this->deleteKey = 'oldid';
 131                 } else if( $this->artimestamps ) {
 132                         $this->archrevs = $this->artimestamps;
 133                         $hide_content_name = array( 'revdelete-hide-text', 'wpHideText', Revision::DELETED_TEXT );
 134                         $this->deleteKey = 'artimestamp';
 135                 } else if( $this->oldimgs ) {
 136                         $this->ofiles = $this->oldimgs;
 137                         $hide_content_name = array( 'revdelete-hide-image', 'wpHideImage', File::DELETED_FILE );
 138                         $this->deleteKey = 'oldimage';
 139                 } else if( $this->fileids ) {
 140                         $this->afiles = $this->fileids;
 141                         $hide_content_name = array( 'revdelete-hide-image', 'wpHideImage', File::DELETED_FILE );
 142                         $this->deleteKey = 'fileid';
 143                 } else if( $this->logids ) {
 144                         $this->events = $this->logids;
 145                         $hide_content_name = array( 'revdelete-hide-name', 'wpHideName', LogPage::DELETED_ACTION );
 146                         $this->deleteKey = 'logid';
 147                 }
 148                 // Our checkbox messages depends one what we are doing,
 149                 // e.g. we don't hide "text" for logs or images
 150                 $this->checks = array(
 151                         $hide_content_name,
 152                         array( 'revdelete-hide-comment', 'wpHideComment', Revision::DELETED_COMMENT ),
 153                         array( 'revdelete-hide-user', 'wpHideUser', Revision::DELETED_USER )
 154                 );
 155                 if( $wgUser->isAllowed('suppressrevision') ) {
 156                         $this->checks[] = array( 'revdelete-hide-restricted', 'wpHideRestricted', Revision::DELETED_RESTRICTED );
 157                 }
 158         }
 159
 160         /**
 161          * Show a deleted file version requested by the visitor.
 162          */
 163         private function showFile( $key ) {
 164                 global $wgOut, $wgRequest;
 165                 $wgOut->disable();
 166
 167                 # We mustn't allow the output to be Squid cached, otherwise
 168                 # if an admin previews a deleted image, and it's cached, then
 169                 # a user without appropriate permissions can toddle off and
 170                 # nab the image, and Squid will serve it
 171                 $wgRequest->response()->header( 'Expires: ' . gmdate( 'D, d M Y H:i:s', 0 ) . ' GMT' );
 172                 $wgRequest->response()->header( 'Cache-Control: no-cache, no-store, max-age=0, must-revalidate' );
 173                 $wgRequest->response()->header( 'Pragma: no-cache' );
 174
 175                 $store = FileStore::get( 'deleted' );
 176                 $store->stream( $key );
 177         }
 178
 179         /**
 180          * This lets a user set restrictions for live and archived revisions
 181          */
 182         private function showRevs() {
 183                 global $wgOut, $wgUser;
 184                 $UserAllowed = true;
 185
 186                 $count = ($this->deleteKey=='oldid') ?
 187                         count($this->revisions) : count($this->archrevs);
 188                 $wgOut->addWikiMsg( 'revdelete-selected', $this->page->getPrefixedText(), $count );
 189
 190                 $bitfields = 0;
 191                 $wgOut->addHTML( "<ul>" );
 192
 193                 $where = $revObjs = array();
 194                 $dbr = wfGetDB( DB_MASTER );
 195
 196                 $revisions = 0;
 197                 // Live revisions...
 198                 if( $this->deleteKey=='oldid' ) {
 199                         // Run through and pull all our data in one query
 200                         foreach( $this->revisions as $revid ) {
 201                                 $where[] = intval($revid);
 202                         }
 203                         $result = $dbr->select( array('revision','page'), '*',
 204                                 array(
 205                                         'rev_page' => $this->page->getArticleID(),
 206                                         'rev_id' => $where,
 207                                         'rev_page = page_id' ),
 208                                 __METHOD__ );
 209                         while( $row = $dbr->fetchObject( $result ) ) {
 210                                 $revObjs[$row->rev_id] = new Revision( $row );
 211                         }
 212                         foreach( $this->revisions as $revid ) {
 213                                 // Hiding top revisison is bad
 214                                 if( !isset($revObjs[$revid]) || $revObjs[$revid]->isCurrent() ) {
 215                                         continue;
 216                                 } else if( !$revObjs[$revid]->userCan(Revision::DELETED_RESTRICTED) ) {
 217                                 // If a rev is hidden from sysops
 218                                         if( !$this->wasPosted ) {
 219                                                 $wgOut->permissionRequired( 'suppressrevision' );
 220                                                 return;
 221                                         }
 222                                         $UserAllowed = false;
 223                                 }
 224                                 $revisions++;
 225                                 $wgOut->addHTML( $this->historyLine( $revObjs[$revid] ) );
 226                                 $bitfields |= $revObjs[$revid]->mDeleted;
 227                         }
 228                 // The archives...
 229                 } else {
 230                         // Run through and pull all our data in one query
 231                         foreach( $this->archrevs as $timestamp ) {
 232                                 $where[] = $dbr->timestamp( $timestamp );
 233                         }
 234                         $result = $dbr->select( 'archive', '*',
 235                                 array(
 236                                         'ar_namespace' => $this->page->getNamespace(),
 237                                         'ar_title' => $this->page->getDBKey(),
 238                                         'ar_timestamp' => $where ),
 239                                 __METHOD__ );
 240                         while( $row = $dbr->fetchObject( $result ) ) {
 241                                 $timestamp = wfTimestamp( TS_MW, $row->ar_timestamp );
 242                                 $revObjs[$timestamp] = new Revision( array(
 243                                         'page'       => $this->page->getArticleId(),
 244                                         'id'         => $row->ar_rev_id,
 245                                         'text'       => $row->ar_text_id,
 246                                         'comment'    => $row->ar_comment,
 247                                         'user'       => $row->ar_user,
 248                                         'user_text'  => $row->ar_user_text,
 249                                         'timestamp'  => $timestamp,
 250                                         'minor_edit' => $row->ar_minor_edit,
 251                                         'text_id'    => $row->ar_text_id,
 252                                         'deleted'    => $row->ar_deleted,
 253                                         'len'        => $row->ar_len) );
 254                         }
 255                         foreach( $this->archrevs as $timestamp ) {
 256                                 if( !isset($revObjs[$timestamp]) ) {
 257                                         continue;
 258                                 } else if( !$revObjs[$timestamp]->userCan(Revision::DELETED_RESTRICTED) ) {
 259                                 // If a rev is hidden from sysops
 260                                         if( !$this->wasPosted ) {
 261                                                 $wgOut->permissionRequired( 'suppressrevision' );
 262                                                 return;
 263                                         }
 264                                         $UserAllowed = false;
 265                                 }
 266                                 $revisions++;
 267                                 $wgOut->addHTML( $this->historyLine( $revObjs[$timestamp] ) );
 268                                 $bitfields |= $revObjs[$timestamp]->mDeleted;
 269                         }
 270                 }
 271                 if( !$revisions ) {
 272                         $wgOut->showErrorPage( 'revdelete-nooldid-title', 'revdelete-nooldid-text' );
 273                         return;
 274                 }
 275
 276                 $wgOut->addHTML( "</ul>" );
 277                 // Explanation text
 278                 $this->addUsageText();
 279
 280                 // Normal sysops can always see what they did, but can't always change it
 281                 if( !$UserAllowed ) return;
 282
 283                 $items = array(
 284                         Xml::inputLabel( wfMsg( 'revdelete-log' ), 'wpReason', 'wpReason', 60 ),
 285                         Xml::submitButton( wfMsg( 'revdelete-submit' ) )
 286                 );
 287                 $hidden = array(
 288                         Xml::hidden( 'wpEditToken', $wgUser->editToken() ),
 289                         Xml::hidden( 'target', $this->page->getPrefixedText() ),
 290                         Xml::hidden( 'type', $this->deleteKey )
 291                 );
 292                 if( $this->deleteKey=='oldid' ) {
 293                         foreach( $revObjs as $rev )
 294                                 $hidden[] = Xml::hidden( 'oldid[]', $rev->getId() );
 295                 } else {
 296                         foreach( $revObjs as $rev )
 297                                 $hidden[] = Xml::hidden( 'artimestamp[]', $rev->getTimestamp() );
 298                 }
 299                 $special = SpecialPage::getTitleFor( 'Revisiondelete' );
 300                 $wgOut->addHTML(
 301                         Xml::openElement( 'form', array( 'method' => 'post', 'action' => $special->getLocalUrl( 'action=submit' ),
 302                                 'id' => 'mw-revdel-form-revisions' ) ) .
 303                         Xml::openElement( 'fieldset' ) .
 304                         xml::element( 'legend', null,  wfMsg( 'revdelete-legend' ) )
 305                 );
 306
 307                 $wgOut->addHTML( $this->buildCheckBoxes( $bitfields ) );
 308                 foreach( $items as $item ) {
 309                         $wgOut->addHTML( Xml::tags( 'p', null, $item ) );
 310                 }
 311                 foreach( $hidden as $item ) {
 312                         $wgOut->addHTML( $item );
 313                 }
 314                 $wgOut->addHTML(
 315                         Xml::closeElement( 'fieldset' ) .
 316                         Xml::closeElement( 'form' ) . "\n"
 317                 );
 318         }
 319
 320         /**
 321          * This lets a user set restrictions for archived images
 322          */
 323         private function showImages() {
 324                 global $wgOut, $wgUser, $wgLang;
 325                 $UserAllowed = true;
 326
 327                 $count = ($this->deleteKey=='oldimage') ? count($this->ofiles) : count($this->afiles);
 328                 $wgOut->addWikiMsg( 'revdelete-selected', $this->page->getPrefixedText(),
 329                         $wgLang->formatNum($count) );
 330
 331                 $bitfields = 0;
 332                 $wgOut->addHTML( "<ul>" );
 333
 334                 $where = $filesObjs = array();
 335                 $dbr = wfGetDB( DB_MASTER );
 336                 // Live old revisions...
 337                 $revisions = 0;
 338                 if( $this->deleteKey=='oldimage' ) {
 339                         // Run through and pull all our data in one query
 340                         foreach( $this->ofiles as $timestamp ) {
 341                                 $where[] = $timestamp.'!'.$this->page->getDBKey();
 342                         }
 343                         $result = $dbr->select( 'oldimage', '*',
 344                                 array(
 345                                         'oi_name' => $this->page->getDBKey(),
 346                                         'oi_archive_name' => $where ),
 347                                 __METHOD__ );
 348                         while( $row = $dbr->fetchObject( $result ) ) {
 349                                 $filesObjs[$row->oi_archive_name] = RepoGroup::singleton()->getLocalRepo()->newFileFromRow( $row );
 350                                 $filesObjs[$row->oi_archive_name]->user = $row->oi_user;
 351                                 $filesObjs[$row->oi_archive_name]->user_text = $row->oi_user_text;
 352                         }
 353                         // Check through our images
 354                         foreach( $this->ofiles as $timestamp ) {
 355                                 $archivename = $timestamp.'!'.$this->page->getDBKey();
 356                                 if( !isset($filesObjs[$archivename]) ) {
 357                                         continue;
 358                                 } else if( !$filesObjs[$archivename]->userCan(File::DELETED_RESTRICTED) ) {
 359                                         // If a rev is hidden from sysops
 360                                         if( !$this->wasPosted ) {
 361                                                 $wgOut->permissionRequired( 'suppressrevision' );
 362                                                 return;
 363                                         }
 364                                         $UserAllowed = false;
 365                                 }
 366                                 $revisions++;
 367                                 // Inject history info
 368                                 $wgOut->addHTML( $this->fileLine( $filesObjs[$archivename] ) );
 369                                 $bitfields |= $filesObjs[$archivename]->deleted;
 370                         }
 371                 // Archived files...
 372                 } else {
 373                         // Run through and pull all our data in one query
 374                         foreach( $this->afiles as $id ) {
 375                                 $where[] = intval($id);
 376                         }
 377                         $result = $dbr->select( 'filearchive', '*',
 378                                 array(
 379                                         'fa_name' => $this->page->getDBKey(),
 380                                         'fa_id' => $where ),
 381                                 __METHOD__ );
 382                         while( $row = $dbr->fetchObject( $result ) ) {
 383                                 $filesObjs[$row->fa_id] = ArchivedFile::newFromRow( $row );
 384                         }
 385
 386                         foreach( $this->afiles as $fileid ) {
 387                                 if( !isset($filesObjs[$fileid]) ) {
 388                                         continue;
 389                                 } else if( !$filesObjs[$fileid]->userCan(File::DELETED_RESTRICTED) ) {
 390                                         // If a rev is hidden from sysops
 391                                         if( !$this->wasPosted ) {
 392                                                 $wgOut->permissionRequired( 'suppressrevision' );
 393                                                 return;
 394                                         }
 395                                         $UserAllowed = false;
 396                                 }
 397                                 $revisions++;
 398                                 // Inject history info
 399                                 $wgOut->addHTML( $this->archivedfileLine( $filesObjs[$fileid] ) );
 400                                 $bitfields |= $filesObjs[$fileid]->deleted;
 401                         }
 402                 }
 403                 if( !$revisions ) {
 404                         $wgOut->showErrorPage( 'revdelete-nooldid-title', 'revdelete-nooldid-text' );
 405                         return;
 406                 }
 407
 408                 $wgOut->addHTML( "</ul>" );
 409                 // Explanation text
 410                 $this->addUsageText();
 411                 // Normal sysops can always see what they did, but can't always change it
 412                 if( !$UserAllowed ) return;
 413
 414                 $items = array(
 415                         Xml::inputLabel( wfMsg( 'revdelete-log' ), 'wpReason', 'wpReason', 60 ),
 416                         Xml::submitButton( wfMsg( 'revdelete-submit' ) )
 417                 );
 418                 $hidden = array(
 419                         Xml::hidden( 'wpEditToken', $wgUser->editToken() ),
 420                         Xml::hidden( 'target', $this->page->getPrefixedText() ),
 421                         Xml::hidden( 'type', $this->deleteKey )
 422                 );
 423                 if( $this->deleteKey=='oldimage' ) {
 424                         foreach( $this->ofiles as $filename )
 425                                 $hidden[] = Xml::hidden( 'oldimage[]', $filename );
 426                 } else {
 427                         foreach( $this->afiles as $fileid )
 428                                 $hidden[] = Xml::hidden( 'fileid[]', $fileid );
 429                 }
 430                 $special = SpecialPage::getTitleFor( 'Revisiondelete' );
 431                 $wgOut->addHTML(
 432                         Xml::openElement( 'form', array( 'method' => 'post', 'action' => $special->getLocalUrl( 'action=submit' ),
 433                                 'id' => 'mw-revdel-form-filerevisions' ) ) .
 434                         Xml::fieldset( wfMsg( 'revdelete-legend' ) )
 435                 );
 436
 437                 $wgOut->addHTML( $this->buildCheckBoxes( $bitfields ) );
 438                 foreach( $items as $item ) {
 439                         $wgOut->addHTML( "<p>$item</p>" );
 440                 }
 441                 foreach( $hidden as $item ) {
 442                         $wgOut->addHTML( $item );
 443                 }
 444
 445                 $wgOut->addHTML(
 446                         Xml::closeElement( 'fieldset' ) .
 447                         Xml::closeElement( 'form' ) . "\n"
 448                 );
 449         }
 450
 451         /**
 452          * This lets a user set restrictions for log items
 453          */
 454         private function showLogItems() {
 455                 global $wgOut, $wgUser, $wgMessageCache, $wgLang;
 456                 $UserAllowed = true;
 457
 458                 $wgOut->addWikiMsg( 'logdelete-selected', $wgLang->formatNum( count($this->events) ) );
 459
 460                 $bitfields = 0;
 461                 $wgOut->addHTML( "<ul>" );
 462
 463                 $where = $logRows = array();
 464                 $dbr = wfGetDB( DB_MASTER );
 465                 // Run through and pull all our data in one query
 466                 $logItems = 0;
 467                 foreach( $this->events as $logid ) {
 468                         $where[] = intval($logid);
 469                 }
 470                 list($log,$logtype) = explode( '/',$this->page->getDBKey(), 2 );
 471                 $result = $dbr->select( 'logging', '*',
 472                         array(
 473                                 'log_type' => $logtype,
 474                                 'log_id' => $where ),
 475                         __METHOD__ );
 476                 while( $row = $dbr->fetchObject( $result ) ) {
 477                         $logRows[$row->log_id] = $row;
 478                 }
 479                 $wgMessageCache->loadAllMessages();
 480                 foreach( $this->events as $logid ) {
 481                         // Don't hide from oversight log!!!
 482                         if( !isset( $logRows[$logid] ) || $logRows[$logid]->log_type=='suppress' ) {
 483                                 continue;
 484                         } else if( !LogEventsList::userCan( $logRows[$logid],Revision::DELETED_RESTRICTED) ) {
 485                         // If an event is hidden from sysops
 486                                 if( !$this->wasPosted ) {
 487                                         $wgOut->permissionRequired( 'suppressrevision' );
 488                                         return;
 489                                 }
 490                                 $UserAllowed = false;
 491                         }
 492                         $logItems++;
 493                         $wgOut->addHTML( $this->logLine( $logRows[$logid] ) );
 494                         $bitfields |= $logRows[$logid]->log_deleted;
 495                 }
 496                 if( !$logItems ) {
 497                         $wgOut->showErrorPage( 'revdelete-nologid-title', 'revdelete-nologid-text' );
 498                         return;
 499                 }
 500
 501                 $wgOut->addHTML( "</ul>" );
 502                 // Explanation text
 503                 $this->addUsageText();
 504                 // Normal sysops can always see what they did, but can't always change it
 505                 if( !$UserAllowed ) return;
 506
 507                 $items = array(
 508                         Xml::inputLabel( wfMsg( 'revdelete-log' ), 'wpReason', 'wpReason', 60 ),
 509                         Xml::submitButton( wfMsg( 'revdelete-submit' ) ) );
 510                 $hidden = array(
 511                         Xml::hidden( 'wpEditToken', $wgUser->editToken() ),
 512                         Xml::hidden( 'target', $this->page->getPrefixedText() ),
 513                         Xml::hidden( 'type', $this->deleteKey ) );
 514                 foreach( $this->events as $logid ) {
 515                         $hidden[] = Xml::hidden( 'logid[]', $logid );
 516                 }
 517
 518                 $special = SpecialPage::getTitleFor( 'Revisiondelete' );
 519                 $wgOut->addHTML(
 520                         Xml::openElement( 'form', array( 'method' => 'post', 'action' => $special->getLocalUrl( 'action=submit' ),
 521                                 'id' => 'mw-revdel-form-logs' ) ) .
 522                         Xml::fieldset( wfMsg( 'revdelete-legend' ) )
 523                 );
 524
 525                 $wgOut->addHTML( $this->buildCheckBoxes( $bitfields ) );
 526                 foreach( $items as $item ) {
 527                         $wgOut->addHTML( "<p>$item</p>" );
 528                 }
 529                 foreach( $hidden as $item ) {
 530                         $wgOut->addHTML( $item );
 531                 }
 532
 533                 $wgOut->addHTML(
 534                         Xml::closeElement( 'fieldset' ) .
 535                         Xml::closeElement( 'form' ) . "\n"
 536                 );
 537         }
 538
 539         private function addUsageText() {
 540                 global $wgOut, $wgUser;
 541                 $wgOut->addWikiMsg( 'revdelete-text' );
 542                 if( $wgUser->isAllowed( 'suppressrevision' ) ) {
 543                         $wgOut->addWikiMsg( 'revdelete-suppress-text' );
 544                 }
 545         }
 546
 547         /**
 548         * @param int $bitfields, aggregate bitfield of all the bitfields
 549         * @returns string HTML
 550         */
 551         private function buildCheckBoxes( $bitfields ) {
 552                 $html = '';
 553                 // FIXME: all items checked for just one rev are checked, even if not set for the others
 554                 foreach( $this->checks as $item ) {
 555                         list( $message, $name, $field ) = $item;
 556                         $line = Xml::tags( 'div', null, Xml::checkLabel( wfMsg($message), $name, $name,
 557                                 $bitfields & $field ) );
 558                         if( $field == Revision::DELETED_RESTRICTED ) $line = "<b>$line</b>";
 559                         $html .= $line;
 560                 }
 561                 return $html;
 562         }
 563
 564         /**
 565          * @param Revision $rev
 566          * @returns string
 567          */
 568         private function historyLine( $rev ) {
 569                 global $wgLang, $wgUser;
 570
 571                 $date = $wgLang->timeanddate( $rev->getTimestamp() );
 572                 $difflink = $del = '';
 573                 // Live revisions
 574                 if( $this->deleteKey=='oldid' ) {
 575                         $tokenParams = '&unhide=1&token='.urlencode( $wgUser->editToken( $rev->getId() ) );
 576                         $revlink = $this->skin->makeLinkObj( $this->page, $date, 'oldid='.$rev->getId() . $tokenParams );
 577                         $difflink = '(' . $this->skin->makeKnownLinkObj( $this->page, wfMsgHtml('diff'),
 578                                 'diff=' . $rev->getId() . '&oldid=prev' . $tokenParams ) . ')';
 579                 // Archived revisions
 580                 } else {
 581                         $undelete = SpecialPage::getTitleFor( 'Undelete' );
 582                         $target = $this->page->getPrefixedText();
 583                         $revlink = $this->skin->makeLinkObj( $undelete, $date,
 584                                 "target=$target&timestamp=" . $rev->getTimestamp() );
 585                         $difflink = '(' . $this->skin->makeKnownLinkObj( $undelete, wfMsgHtml('diff'),
 586                                 "target=$target&diff=prev&timestamp=" . $rev->getTimestamp() ) . ')';
 587                 }
 588                 // Check permissions; items may be "suppressed"
 589                 if( $rev->isDeleted(Revision::DELETED_TEXT) ) {
 590                         $revlink = '<span class="history-deleted">'.$revlink.'</span>';
 591                         $del = ' <tt>' . wfMsgHtml( 'deletedrev' ) . '</tt>';
 592                         if( !$rev->userCan(Revision::DELETED_TEXT) ) {
 593                                 $revlink = '<span class="history-deleted">'.$date.'</span>';
 594                                 $difflink = '(' . wfMsgHtml('diff') . ')';
 595                         }
 596                 }
 597                 $userlink = $this->skin->revUserLink( $rev );
 598                 $comment = $this->skin->revComment( $rev );
 599
 600                 return "<li>$difflink $revlink $userlink $comment{$del}</li>";
 601         }
 602
 603         /**
 604          * @param File $file
 605          * @returns string
 606          */
 607         private function fileLine( $file ) {
 608                 global $wgLang, $wgTitle;
 609
 610                 $target = $this->page->getPrefixedText();
 611                 $date = $wgLang->timeanddate( $file->getTimestamp(), true  );
 612
 613                 $del = '';
 614                 # Hidden files...
 615                 if( $file->isDeleted(File::DELETED_FILE) ) {
 616                         $del = ' <tt>' . wfMsgHtml( 'deletedrev' ) . '</tt>';
 617                         if( !$file->userCan(File::DELETED_FILE) ) {
 618                                 $pageLink = $date;
 619                         } else {
 620                                 $pageLink = $this->skin->makeKnownLinkObj( $wgTitle, $date,
 621                                         "target=$target&file=$file->sha1.".$file->getExtension() );
 622                         }
 623                         $pageLink = '<span class="history-deleted">' . $pageLink . '</span>';
 624                 # Regular files...
 625                 } else {
 626                         $url = $file->getUrlRel();
 627                         $pageLink = "<a href=\"{$url}\">{$date}</a>";
 628                 }
 629
 630                 $data = wfMsg( 'widthheight',
 631                                         $wgLang->formatNum( $file->getWidth() ),
 632                                         $wgLang->formatNum( $file->getHeight() ) ) .
 633                         ' (' . wfMsgExt( 'nbytes', 'parsemag', $wgLang->formatNum( $file->getSize() ) ) . ')';
 634                 $data = htmlspecialchars( $data );
 635
 636                 return "<li>$pageLink ".$this->fileUserTools( $file )." $data ".$this->fileComment( $file )."$del</li>";
 637         }
 638
 639         /**
 640          * @param ArchivedFile $file
 641          * @returns string
 642          */
 643         private function archivedfileLine( $file ) {
 644                 global $wgLang;
 645
 646                 $target = $this->page->getPrefixedText();
 647                 $date = $wgLang->timeanddate( $file->getTimestamp(), true  );
 648
 649                 $undelete = SpecialPage::getTitleFor( 'Undelete' );
 650                 $pageLink = $this->skin->makeKnownLinkObj( $undelete, $date, "target=$target&file={$file->getKey()}" );
 651
 652                 $del = '';
 653                 if( $file->isDeleted(File::DELETED_FILE) ) {
 654                         $del = ' <tt>' . wfMsgHtml( 'deletedrev' ) . '</tt>';
 655                 }
 656
 657                 $data = wfMsg( 'widthheight',
 658                                         $wgLang->formatNum( $file->getWidth() ),
 659                                         $wgLang->formatNum( $file->getHeight() ) ) .
 660                         ' (' . wfMsgExt( 'nbytes', 'parsemag', $wgLang->formatNum( $file->getSize() ) ) . ')';
 661                 $data = htmlspecialchars( $data );
 662
 663                 return "<li> $pageLink ".$this->fileUserTools( $file )." $data ".$this->fileComment( $file )."$del</li>";
 664         }
 665
 666         /**
 667          * @param Array $row row
 668          * @returns string
 669          */
 670         private function logLine( $row ) {
 671                 global $wgLang;
 672
 673                 $date = $wgLang->timeanddate( $row->log_timestamp );
 674                 $paramArray = LogPage::extractParams( $row->log_params );
 675                 $title = Title::makeTitle( $row->log_namespace, $row->log_title );
 676
 677                 $logtitle = SpecialPage::getTitleFor( 'Log' );
 678                 $loglink = $this->skin->makeKnownLinkObj( $logtitle, wfMsgHtml( 'log' ),
 679                         wfArrayToCGI( array( 'page' => $title->getPrefixedUrl() ) ) );
 680                 // Action text
 681                 if( !LogEventsList::userCan($row,LogPage::DELETED_ACTION) ) {
 682                         $action = '<span class="history-deleted">' . wfMsgHtml('rev-deleted-event') . '</span>';
 683                 } else {
 684                         $action = LogPage::actionText( $row->log_type, $row->log_action, $title,
 685                                 $this->skin, $paramArray, true, true );
 686                         if( $row->log_deleted & LogPage::DELETED_ACTION )
 687                                 $action = '<span class="history-deleted">' . $action . '</span>';
 688                 }
 689                 // User links
 690                 $userLink = $this->skin->userLink( $row->log_user, User::WhoIs($row->log_user) );
 691                 if( LogEventsList::isDeleted($row,LogPage::DELETED_USER) ) {
 692                         $userLink = '<span class="history-deleted">' . $userLink . '</span>';
 693                 }
 694                 // Comment
 695                 $comment = $wgLang->getDirMark() . $this->skin->commentBlock( $row->log_comment );
 696                 if( LogEventsList::isDeleted($row,LogPage::DELETED_COMMENT) ) {
 697                         $comment = '<span class="history-deleted">' . $comment . '</span>';
 698                 }
 699                 return "<li>($loglink) $date $userLink $action $comment</li>";
 700         }
 701
 702         /**
 703          * Generate a user tool link cluster if the current user is allowed to view it
 704          * @param ArchivedFile $file
 705          * @return string HTML
 706          */
 707         private function fileUserTools( $file ) {
 708                 if( $file->userCan( Revision::DELETED_USER ) ) {
 709                         $link = $this->skin->userLink( $file->user, $file->user_text ) .
 710                                 $this->skin->userToolLinks( $file->user, $file->user_text );
 711                 } else {
 712                         $link = wfMsgHtml( 'rev-deleted-user' );
 713                 }
 714                 if( $file->isDeleted( Revision::DELETED_USER ) ) {
 715                         return '<span class="history-deleted">' . $link . '</span>';
 716                 }
 717                 return $link;
 718         }
 719
 720         /**
 721          * Wrap and format the given file's comment block, if the current
 722          * user is allowed to view it.
 723          *
 724          * @param ArchivedFile $file
 725          * @return string HTML
 726          */
 727         private function fileComment( $file ) {
 728                 if( $file->userCan( File::DELETED_COMMENT ) ) {
 729                         $block = $this->skin->commentBlock( $file->description );
 730                 } else {
 731                         $block = ' ' . wfMsgHtml( 'rev-deleted-comment' );
 732                 }
 733                 if( $file->isDeleted( File::DELETED_COMMENT ) ) {
 734                         return "<span class=\"history-deleted\">$block</span>";
 735                 }
 736                 return $block;
 737         }
 738
 739         /**
 740          * @param WebRequest $request
 741          */
 742         private function submit( $request ) {
 743                 global $wgUser, $wgOut;
 744
 745                 $bitfield = $this->extractBitfield( $request );
 746                 $comment = $request->getText( 'wpReason' );
 747                 # Can the user set this field?
 748                 if( $bitfield & Revision::DELETED_RESTRICTED && !$wgUser->isAllowed('suppressrevision') ) {
 749                         $wgOut->permissionRequired( 'suppressrevision' );
 750                         return false;
 751                 }
 752                 # If the save went through, go to success message. Otherwise
 753                 # bounce back to form...
 754                 if( $this->save( $bitfield, $comment, $this->page ) ) {
 755                         $this->success();
 756                 } else if( $request->getCheck( 'oldid' ) || $request->getCheck( 'artimestamp' ) ) {
 757                         return $this->showRevs();
 758                 } else if( $request->getCheck( 'logid' ) ) {
 759                         return $this->showLogs();
 760                 } else if( $request->getCheck( 'oldimage' ) || $request->getCheck( 'fileid' ) ) {
 761                         return $this->showImages();
 762                 }
 763         }
 764
 765         private function success() {
 766                 global $wgOut;
 767
 768                 $wgOut->setPagetitle( wfMsg( 'actioncomplete' ) );
 769
 770                 $wrap = '<span class="success">$1</span>';
 771
 772                 if( $this->deleteKey=='logid' ) {
 773                         $wgOut->wrapWikiMsg( $wrap, 'logdelete-success' );
 774                         $this->showLogItems();
 775                 } else if( $this->deleteKey=='oldid' || $this->deleteKey=='artimestamp' ) {
 776                                 $wgOut->wrapWikiMsg( $wrap, 'revdelete-success' );
 777                         $this->showRevs();
 778                 } else if( $this->deleteKey=='fileid' ) {
 779                         $wgOut->wrapWikiMsg( $wrap, 'revdelete-success' );
 780                         $this->showImages();
 781                 } else if( $this->deleteKey=='oldimage' ) {
 782                         $wgOut->wrapWikiMsg( $wrap, 'revdelete-success' );
 783                         $this->showImages();
 784                 }
 785         }
 786
 787         /**
 788          * Put together a rev_deleted bitfield from the submitted checkboxes
 789          * @param WebRequest $request
 790          * @return int
 791          */
 792         private function extractBitfield( $request ) {
 793                 $bitfield = 0;
 794                 foreach( $this->checks as $item ) {
 795                         list( /* message */ , $name, $field ) = $item;
 796                         if( $request->getCheck( $name ) ) {
 797                                 $bitfield |= $field;
 798                         }
 799                 }
 800                 return $bitfield;
 801         }
 802
 803         private function save( $bitfield, $reason, $title ) {
 804                 $dbw = wfGetDB( DB_MASTER );
 805                 // Don't allow simply locking the interface for no reason
 806                 if( $bitfield == Revision::DELETED_RESTRICTED ) {
 807                         $bitfield = 0;
 808                 }
 809                 $deleter = new RevisionDeleter( $dbw );
 810                 // By this point, only one of the below should be set
 811                 if( isset($this->revisions) ) {
 812                         return $deleter->setRevVisibility( $title, $this->revisions, $bitfield, $reason );
 813                 } else if( isset($this->archrevs) ) {
 814                         return $deleter->setArchiveVisibility( $title, $this->archrevs, $bitfield, $reason );
 815                 } else if( isset($this->ofiles) ) {
 816                         return $deleter->setOldImgVisibility( $title, $this->ofiles, $bitfield, $reason );
 817                 } else if( isset($this->afiles) ) {
 818                         return $deleter->setArchFileVisibility( $title, $this->afiles, $bitfield, $reason );
 819                 } else if( isset($this->events) ) {
 820                         return $deleter->setEventVisibility( $title, $this->events, $bitfield, $reason );
 821                 }
 822         }
 823 }
 824
 825 /**
 826  * Implements the actions for Revision Deletion.
 827  * @ingroup SpecialPage
 828  */
 829 class RevisionDeleter {
 830         function __construct( $db ) {
 831                 $this->dbw = $db;
 832         }
 833
 834         /**
 835          * @param $title, the page these events apply to
 836          * @param array $items list of revision ID numbers
 837          * @param int $bitfield new rev_deleted value
 838          * @param string $comment Comment for log records
 839          */
 840         function setRevVisibility( $title, $items, $bitfield, $comment ) {
 841                 global $wgOut;
 842
 843                 $userAllowedAll = $success = true;
 844                 $revIDs = array();
 845                 $revCount = 0;
 846                 // Run through and pull all our data in one query
 847                 foreach( $items as $revid ) {
 848                         $where[] = intval($revid);
 849                 }
 850                 $result = $this->dbw->select( 'revision', '*',
 851                         array(
 852                                 'rev_page' => $title->getArticleID(),
 853                                 'rev_id' => $where ),
 854                         __METHOD__ );
 855                 while( $row = $this->dbw->fetchObject( $result ) ) {
 856                         $revObjs[$row->rev_id] = new Revision( $row );
 857                 }
 858                 // To work!
 859                 foreach( $items as $revid ) {
 860                         if( !isset($revObjs[$revid]) || $revObjs[$revid]->isCurrent() ) {
 861                                 $success = false;
 862                                 continue; // Must exist
 863                         } else if( !$revObjs[$revid]->userCan(Revision::DELETED_RESTRICTED) ) {
 864                         $userAllowedAll=false;
 865                                 continue;
 866                         }
 867                         // For logging, maintain a count of revisions
 868                         if( $revObjs[$revid]->mDeleted != $bitfield ) {
 869                                 $revCount++;
 870                                 $revIDs[]=$revid;
 871
 872                                 $this->updateRevision( $revObjs[$revid], $bitfield );
 873                                 $this->updateRecentChangesEdits( $revObjs[$revid], $bitfield, false );
 874                         }
 875                 }
 876                 // Clear caches...
 877                 // Don't log or touch if nothing changed
 878                 if( $revCount > 0 ) {
 879                         $this->updateLog( $title, $revCount, $bitfield, $revObjs[$revid]->mDeleted,
 880                                 $comment, $title, 'oldid', $revIDs );
 881                         $this->updatePage( $title );
 882                 }
 883                 // Where all revs allowed to be set?
 884                 if( !$userAllowedAll ) {
 885                         //FIXME: still might be confusing???
 886                         $wgOut->permissionRequired( 'suppressrevision' );
 887                         return false;
 888                 }
 889
 890                 return $success;
 891         }
 892
 893          /**
 894          * @param $title, the page these events apply to
 895          * @param array $items list of revision ID numbers
 896          * @param int $bitfield new rev_deleted value
 897          * @param string $comment Comment for log records
 898          */
 899         function setArchiveVisibility( $title, $items, $bitfield, $comment ) {
 900                 global $wgOut;
 901
 902                 $userAllowedAll = $success = true;
 903                 $count = 0;
 904                 $Id_set = array();
 905                 // Run through and pull all our data in one query
 906                 foreach( $items as $timestamp ) {
 907                         $where[] = $this->dbw->timestamp( $timestamp );
 908                 }
 909                 $result = $this->dbw->select( 'archive', '*',
 910                         array(
 911                                 'ar_namespace' => $title->getNamespace(),
 912                                 'ar_title' => $title->getDBKey(),
 913                                 'ar_timestamp' => $where ),
 914                         __METHOD__ );
 915                 while( $row = $this->dbw->fetchObject( $result ) ) {
 916                         $timestamp = wfTimestamp( TS_MW, $row->ar_timestamp );
 917                         $revObjs[$timestamp] = new Revision( array(
 918                                 'page'       => $title->getArticleId(),
 919                                 'id'         => $row->ar_rev_id,
 920                                 'text'       => $row->ar_text_id,
 921                                 'comment'    => $row->ar_comment,
 922                                 'user'       => $row->ar_user,
 923                                 'user_text'  => $row->ar_user_text,
 924                                 'timestamp'  => $timestamp,
 925                                 'minor_edit' => $row->ar_minor_edit,
 926                                 'text_id'    => $row->ar_text_id,
 927                                 'deleted'    => $row->ar_deleted,
 928                                 'len'        => $row->ar_len) );
 929                 }
 930                 // To work!
 931                 foreach( $items as $timestamp ) {
 932                         // This will only select the first revision with this timestamp.
 933                         // Since they are all selected/deleted at once, we can just check the
 934                         // permissions of one. UPDATE is done via timestamp, so all revs are set.
 935                         if( !is_object($revObjs[$timestamp]) ) {
 936                                 $success = false;
 937                                 continue; // Must exist
 938                         } else if( !$revObjs[$timestamp]->userCan(Revision::DELETED_RESTRICTED) ) {
 939                         $userAllowedAll=false;
 940                                 continue;
 941                         }
 942                         // Which revisions did we change anything about?
 943                         if( $revObjs[$timestamp]->mDeleted != $bitfield ) {
 944                            $Id_set[]=$timestamp;
 945                            $count++;
 946
 947                            $this->updateArchive( $revObjs[$timestamp], $title, $bitfield );
 948                         }
 949                 }
 950                 // For logging, maintain a count of revisions
 951                 if( $count > 0 ) {
 952                         $this->updateLog( $title, $count, $bitfield, $revObjs[$timestamp]->mDeleted,
 953                                 $comment, $title, 'artimestamp', $Id_set );
 954                 }
 955                 // Where all revs allowed to be set?
 956                 if( !$userAllowedAll ) {
 957                         $wgOut->permissionRequired( 'suppressrevision' );
 958                         return false;
 959                 }
 960
 961                 return $success;
 962         }
 963
 964          /**
 965          * @param $title, the page these events apply to
 966          * @param array $items list of revision ID numbers
 967          * @param int $bitfield new rev_deleted value
 968          * @param string $comment Comment for log records
 969          */
 970         function setOldImgVisibility( $title, $items, $bitfield, $comment ) {
 971                 global $wgOut;
 972
 973                 $userAllowedAll = $success = true;
 974                 $count = 0;
 975                 $set = array();
 976                 // Run through and pull all our data in one query
 977                 foreach( $items as $timestamp ) {
 978                         $where[] = $timestamp.'!'.$title->getDBKey();
 979                 }
 980                 $result = $this->dbw->select( 'oldimage', '*',
 981                         array(
 982                                 'oi_name' => $title->getDBKey(),
 983                                 'oi_archive_name' => $where ),
 984                         __METHOD__ );
 985                 while( $row = $this->dbw->fetchObject( $result ) ) {
 986                         $filesObjs[$row->oi_archive_name] = RepoGroup::singleton()->getLocalRepo()->newFileFromRow( $row );
 987                         $filesObjs[$row->oi_archive_name]->user = $row->oi_user;
 988                         $filesObjs[$row->oi_archive_name]->user_text = $row->oi_user_text;
 989                 }
 990                 // To work!
 991                 foreach( $items as $timestamp ) {
 992                         $archivename = $timestamp.'!'.$title->getDBKey();
 993                         if( !isset($filesObjs[$archivename]) ) {
 994                                 $success = false;
 995                                 continue; // Must exist
 996                         } else if( !$filesObjs[$archivename]->userCan(File::DELETED_RESTRICTED) ) {
 997                         $userAllowedAll=false;
 998                                 continue;
 999                         }
1000
1001                         $transaction = true;
1002                         // Which revisions did we change anything about?
1003                         if( $filesObjs[$archivename]->deleted != $bitfield ) {
1004                                 $count++;
1005
1006                                 $this->dbw->begin();
1007                                 $this->updateOldFiles( $filesObjs[$archivename], $bitfield );
1008                                 // If this image is currently hidden...
1009                                 if( $filesObjs[$archivename]->deleted & File::DELETED_FILE ) {
1010                                         if( $bitfield & File::DELETED_FILE ) {
1011                                                 # Leave it alone if we are not changing this...
1012                                                 $set[]=$archivename;
1013                                                 $transaction = true;
1014                                         } else {
1015                                                 # We are moving this out
1016                                                 $transaction = $this->makeOldImagePublic( $filesObjs[$archivename] );
1017                                                 $set[]=$transaction;
1018                                         }
1019                                 // Is it just now becoming hidden?
1020                                 } else if( $bitfield & File::DELETED_FILE ) {
1021                                         $transaction = $this->makeOldImagePrivate( $filesObjs[$archivename] );
1022                                         $set[]=$transaction;
1023                                 } else {
1024                                         $set[]=$timestamp;
1025                                 }
1026                                 // If our file operations fail, then revert back the db
1027                                 if( $transaction==false ) {
1028                                         $this->dbw->rollback();
1029                                         return false;
1030                                 }
1031                                 $this->dbw->commit();
1032                         }
1033                 }
1034
1035                 // Log if something was changed
1036                 if( $count > 0 ) {
1037                         $this->updateLog( $title, $count, $bitfield, $filesObjs[$archivename]->deleted,
1038                                 $comment, $title, 'oldimage', $set );
1039                         # Purge page/history
1040                         $file = wfLocalFile( $title );
1041                         $file->purgeCache();
1042                         $file->purgeHistory();
1043                         # Invalidate cache for all pages using this file
1044                         $update = new HTMLCacheUpdate( $title, 'imagelinks' );
1045                         $update->doUpdate();
1046                 }
1047                 // Where all revs allowed to be set?
1048                 if( !$userAllowedAll ) {
1049                         $wgOut->permissionRequired( 'suppressrevision' );
1050                         return false;
1051                 }
1052
1053                 return $success;
1054         }
1055
1056          /**
1057          * @param $title, the page these events apply to
1058          * @param array $items list of revision ID numbers
1059          * @param int $bitfield new rev_deleted value
1060          * @param string $comment Comment for log records
1061          */
1062         function setArchFileVisibility( $title, $items, $bitfield, $comment ) {
1063                 global $wgOut;
1064
1065                 $userAllowedAll = $success = true;
1066                 $count = 0;
1067                 $Id_set = array();
1068
1069                 // Run through and pull all our data in one query
1070                 foreach( $items as $id ) {
1071                         $where[] = intval($id);
1072                 }
1073                 $result = $this->dbw->select( 'filearchive', '*',
1074                         array( 'fa_name' => $title->getDBKey(),
1075                                 'fa_id' => $where ),
1076                         __METHOD__ );
1077                 while( $row = $this->dbw->fetchObject( $result ) ) {
1078                         $filesObjs[$row->fa_id] = ArchivedFile::newFromRow( $row );
1079                 }
1080                 // To work!
1081                 foreach( $items as $fileid ) {
1082                         if( !isset($filesObjs[$fileid]) ) {
1083                                 $success = false;
1084                                 continue; // Must exist
1085                         } else if( !$filesObjs[$fileid]->userCan(File::DELETED_RESTRICTED) ) {
1086                         $userAllowedAll=false;
1087                                 continue;
1088                         }
1089                         // Which revisions did we change anything about?
1090                         if( $filesObjs[$fileid]->deleted != $bitfield ) {
1091                            $Id_set[]=$fileid;
1092                            $count++;
1093
1094                            $this->updateArchFiles( $filesObjs[$fileid], $bitfield );
1095                         }
1096                 }
1097                 // Log if something was changed
1098                 if( $count > 0 ) {
1099                         $this->updateLog( $title, $count, $bitfield, $comment,
1100                                 $filesObjs[$fileid]->deleted, $title, 'fileid', $Id_set );
1101                 }
1102                 // Where all revs allowed to be set?
1103                 if( !$userAllowedAll ) {
1104                         $wgOut->permissionRequired( 'suppressrevision' );
1105                         return false;
1106                 }
1107
1108                 return $success;
1109         }
1110
1111         /**
1112          * @param $title, the log page these events apply to
1113          * @param array $items list of log ID numbers
1114          * @param int $bitfield new log_deleted value
1115          * @param string $comment Comment for log records
1116          */
1117         function setEventVisibility( $title, $items, $bitfield, $comment ) {
1118                 global $wgOut;
1119
1120                 $userAllowedAll = $success = true;
1121                 $count = 0;
1122                 $log_Ids = array();
1123
1124                 // Run through and pull all our data in one query
1125                 foreach( $items as $logid ) {
1126                         $where[] = intval($logid);
1127                 }
1128                 list($log,$logtype) = explode( '/',$title->getDBKey(), 2 );
1129                 $result = $this->dbw->select( 'logging', '*',
1130                         array(
1131                                 'log_type' => $logtype,
1132                                 'log_id' => $where ),
1133                         __METHOD__ );
1134                 while( $row = $this->dbw->fetchObject( $result ) ) {
1135                         $logRows[$row->log_id] = $row;
1136                 }
1137                 // To work!
1138                 foreach( $items as $logid ) {
1139                         if( !isset($logRows[$logid]) ) {
1140                                 $success = false;
1141                                 continue; // Must exist
1142                         } else if( !LogEventsList::userCan($logRows[$logid], LogPage::DELETED_RESTRICTED)
1143                                  || $logRows[$logid]->log_type == 'suppress' ) {
1144                         // Don't hide from oversight log!!!
1145                         $userAllowedAll=false;
1146                         continue;
1147                         }
1148                         // Which logs did we change anything about?
1149                         if( $logRows[$logid]->log_deleted != $bitfield ) {
1150                                 $log_Ids[]=$logid;
1151                                 $count++;
1152
1153                                 $this->updateLogs( $logRows[$logid], $bitfield );
1154                                 $this->updateRecentChangesLog( $logRows[$logid], $bitfield, true );
1155                         }
1156                 }
1157                 // Don't log or touch if nothing changed
1158                 if( $count > 0 ) {
1159                         $this->updateLog( $title, $count, $bitfield, $logRows[$logid]->log_deleted,
1160                                 $comment, $title, 'logid', $log_Ids );
1161                 }
1162                 // Were all revs allowed to be set?
1163                 if( !$userAllowedAll ) {
1164                         $wgOut->permissionRequired( 'suppressrevision' );
1165                         return false;
1166                 }
1167
1168                 return $success;
1169         }
1170
1171         /**
1172          * Moves an image to a safe private location
1173          * Caller is responsible for clearing caches
1174          * @param File $oimage
1175          * @returns mixed, timestamp string on success, false on failure
1176          */
1177         function makeOldImagePrivate( $oimage ) {
1178                 $transaction = new FSTransaction();
1179                 if( !FileStore::lock() ) {
1180                         wfDebug( __METHOD__.": failed to acquire file store lock, aborting\n" );
1181                         return false;
1182                 }
1183                 $oldpath = $oimage->getArchivePath() . DIRECTORY_SEPARATOR . $oimage->archive_name;
1184                 // Dupe the file into the file store
1185                 if( file_exists( $oldpath ) ) {
1186                         // Is our directory configured?
1187                         if( $store = FileStore::get( 'deleted' ) ) {
1188                                 if( !$oimage->sha1 ) {
1189                                         $oimage->upgradeRow(); // sha1 may be missing
1190                                 }
1191                                 $key = $oimage->sha1 . '.' . $oimage->getExtension();
1192                                 $transaction->add( $store->insert( $key, $oldpath, FileStore::DELETE_ORIGINAL ) );
1193                         } else {
1194                                 $group = null;
1195                                 $key = null;
1196                                 $transaction = false; // Return an error and do nothing
1197                         }
1198                 } else {
1199                         wfDebug( __METHOD__." deleting already-missing '$oldpath'; moving on to database\n" );
1200                         $group = null;
1201                         $key = '';
1202                         $transaction = new FSTransaction(); // empty
1203                 }
1204
1205                 if( $transaction === false ) {
1206                         // Fail to restore?
1207                         wfDebug( __METHOD__.": import to file store failed, aborting\n" );
1208                         throw new MWException( "Could not archive and delete file $oldpath" );
1209                         return false;
1210                 }
1211
1212                 wfDebug( __METHOD__.": set db items, applying file transactions\n" );
1213                 $transaction->commit();
1214                 FileStore::unlock();
1215
1216                 $m = explode('!',$oimage->archive_name,2);
1217                 $timestamp = $m[0];
1218
1219                 return $timestamp;
1220         }
1221
1222         /**
1223          * Moves an image from a safe private location
1224          * Caller is responsible for clearing caches
1225          * @param File $oimage
1226          * @returns mixed, string timestamp on success, false on failure
1227          */
1228         function makeOldImagePublic( $oimage ) {
1229                 $transaction = new FSTransaction();
1230                 if( !FileStore::lock() ) {
1231                         wfDebug( __METHOD__." could not acquire filestore lock\n" );
1232                         return false;
1233                 }
1234
1235                 $store = FileStore::get( 'deleted' );
1236                 if( !$store ) {
1237                         wfDebug( __METHOD__.": skipping row with no file.\n" );
1238                         return false;
1239                 }
1240
1241                 $key = $oimage->sha1.'.'.$oimage->getExtension();
1242                 $destDir = $oimage->getArchivePath();
1243                 if( !is_dir( $destDir ) ) {
1244                         wfMkdirParents( $destDir );
1245                 }
1246                 $destPath = $destDir . DIRECTORY_SEPARATOR . $oimage->archive_name;
1247                 // Check if any other stored revisions use this file;
1248                 // if so, we shouldn't remove the file from the hidden
1249                 // archives so they will still work. Check hidden files first.
1250                 $useCount = $this->dbw->selectField( 'oldimage', '1',
1251                         array( 'oi_sha1' => $oimage->sha1,
1252                                 'oi_deleted & '.File::DELETED_FILE => File::DELETED_FILE ),
1253                         __METHOD__, array( 'FOR UPDATE' ) );
1254                 // Check the rest of the deleted archives too.
1255                 // (these are the ones that don't show in the image history)
1256                 if( !$useCount ) {
1257                         $useCount = $this->dbw->selectField( 'filearchive', '1',
1258                                 array( 'fa_storage_group' => 'deleted', 'fa_storage_key' => $key ),
1259                                 __METHOD__, array( 'FOR UPDATE' ) );
1260                 }
1261
1262                 if( $useCount == 0 ) {
1263                         wfDebug( __METHOD__.": nothing else using {$oimage->sha1}, will deleting after\n" );
1264                         $flags = FileStore::DELETE_ORIGINAL;
1265                 } else {
1266                         $flags = 0;
1267                 }
1268                 $transaction->add( $store->export( $key, $destPath, $flags ) );
1269
1270                 wfDebug( __METHOD__.": set db items, applying file transactions\n" );
1271                 $transaction->commit();
1272                 FileStore::unlock();
1273
1274                 $m = explode('!',$oimage->archive_name,2);
1275                 $timestamp = $m[0];
1276
1277                 return $timestamp;
1278         }
1279
1280         /**
1281          * Update the revision's rev_deleted field
1282          * @param Revision $rev
1283          * @param int $bitfield new rev_deleted bitfield value
1284          */
1285         function updateRevision( $rev, $bitfield ) {
1286                 $this->dbw->update( 'revision',
1287                         array( 'rev_deleted' => $bitfield ),
1288                         array( 'rev_id' => $rev->getId(),
1289                                 'rev_page' => $rev->getPage() ),
1290                         __METHOD__ );
1291         }
1292
1293         /**
1294          * Update the revision's rev_deleted field
1295          * @param Revision $rev
1296          * @param Title $title
1297          * @param int $bitfield new rev_deleted bitfield value
1298          */
1299         function updateArchive( $rev, $title, $bitfield ) {
1300                 $this->dbw->update( 'archive',
1301                         array( 'ar_deleted' => $bitfield ),
1302                         array( 'ar_namespace' => $title->getNamespace(),
1303                                 'ar_title'     => $title->getDBKey(),
1304                                 'ar_timestamp' => $this->dbw->timestamp( $rev->getTimestamp() ),
1305                                 'ar_rev_id' => $rev->getId() ),
1306                         __METHOD__ );
1307         }
1308
1309         /**
1310          * Update the images's oi_deleted field
1311          * @param File $file
1312          * @param int $bitfield new rev_deleted bitfield value
1313          */
1314         function updateOldFiles( $file, $bitfield ) {
1315                 $this->dbw->update( 'oldimage',
1316                         array( 'oi_deleted' => $bitfield ),
1317                         array( 'oi_name' => $file->getName(),
1318                                 'oi_timestamp' => $this->dbw->timestamp( $file->getTimestamp() ) ),
1319                         __METHOD__ );
1320         }
1321
1322         /**
1323          * Update the images's fa_deleted field
1324          * @param ArchivedFile $file
1325          * @param int $bitfield new rev_deleted bitfield value
1326          */
1327         function updateArchFiles( $file, $bitfield ) {
1328                 $this->dbw->update( 'filearchive',
1329                         array( 'fa_deleted' => $bitfield ),
1330                         array( 'fa_id' => $file->getId() ),
1331                         __METHOD__ );
1332         }
1333
1334         /**
1335          * Update the logging log_deleted field
1336          * @param Row $row
1337          * @param int $bitfield new rev_deleted bitfield value
1338          */
1339         function updateLogs( $row, $bitfield ) {
1340                 $this->dbw->update( 'logging',
1341                         array( 'log_deleted' => $bitfield ),
1342                         array( 'log_id' => $row->log_id ),
1343                         __METHOD__ );
1344         }
1345
1346         /**
1347          * Update the revision's recentchanges record if fields have been hidden
1348          * @param Revision $rev
1349          * @param int $bitfield new rev_deleted bitfield value
1350          */
1351         function updateRecentChangesEdits( $rev, $bitfield ) {
1352                 $this->dbw->update( 'recentchanges',
1353                         array( 'rc_deleted' => $bitfield,
1354                                    'rc_patrolled' => 1 ),
1355                         array( 'rc_this_oldid' => $rev->getId(),
1356                                 'rc_timestamp' => $this->dbw->timestamp( $rev->getTimestamp() ) ),
1357                         __METHOD__ );
1358         }
1359
1360         /**
1361          * Update the revision's recentchanges record if fields have been hidden
1362          * @param Row $row
1363          * @param int $bitfield new rev_deleted bitfield value
1364          */
1365         function updateRecentChangesLog( $row, $bitfield ) {
1366                 $this->dbw->update( 'recentchanges',
1367                         array( 'rc_deleted' => $bitfield,
1368                                    'rc_patrolled' => 1 ),
1369                         array( 'rc_logid' => $row->log_id,
1370                                 'rc_timestamp' => $row->log_timestamp ),
1371                         __METHOD__ );
1372         }
1373
1374         /**
1375          * Touch the page's cache invalidation timestamp; this forces cached
1376          * history views to refresh, so any newly hidden or shown fields will
1377          * update properly.
1378          * @param Title $title
1379          */
1380         function updatePage( $title ) {
1381                 $title->invalidateCache();
1382                 $title->purgeSquid();
1383                 $title->touchLinks();
1384                 // Extensions that require referencing previous revisions may need this
1385                 wfRunHooks( 'ArticleRevisionVisiblitySet', array( &$title ) );
1386         }
1387
1388         /**
1389          * Checks for a change in the bitfield for a certain option and updates the
1390          * provided array accordingly.
1391          *
1392          * @param String $desc Description to add to the array if the option was
1393          * enabled / disabled.
1394          * @param int $field The bitmask describing the single option.
1395          * @param int $diff The xor of the old and new bitfields.
1396          * @param array $arr The array to update.
1397          */
1398         function checkItem ( $desc, $field, $diff, $new, &$arr ) {
1399                 if ( $diff & $field ) {
1400                         $arr [ ( $new & $field ) ? 0 : 1 ][] = $desc;
1401                 }
1402         }
1403
1404         /**
1405          * Gets an array describing the changes made to the visibilit of the revision.
1406          * If the resulting array is $arr, then $arr[0] will contain an array of strings
1407          * describing the items that were hidden, $arr[2] will contain an array of strings
1408          * describing the items that were unhidden, and $arr[3] will contain an array with
1409          * a single string, which can be one of "applied restrictions to sysops",
1410          * "removed restrictions from sysops", or null.
1411          *
1412          * @param int $n The new bitfield.
1413          * @param int $o The old bitfield.
1414          * @return An array as described above.
1415          */
1416         function getChanges ( $n, $o ) {
1417                 $diff = $n ^ $o;
1418                 $ret = array ( 0 => array(), 1 => array(), 2 => array() );
1419
1420                 $this->checkItem ( wfMsgForContent ( 'revdelete-content' ),
1421                                 Revision::DELETED_TEXT, $diff, $n, $ret );
1422                 $this->checkItem ( wfMsgForContent ( 'revdelete-summary' ),
1423                                 Revision::DELETED_COMMENT, $diff, $n, $ret );
1424                 $this->checkItem ( wfMsgForContent ( 'revdelete-uname' ),
1425                                 Revision::DELETED_USER, $diff, $n, $ret );
1426
1427                 // Restriction application to sysops
1428                 if ( $diff & Revision::DELETED_RESTRICTED ) {
1429                         if ( $n & Revision::DELETED_RESTRICTED )
1430                                 $ret[2][] = wfMsgForContent ( 'revdelete-restricted' );
1431                         else
1432                                 $ret[2][] = wfMsgForContent ( 'revdelete-unrestricted' );
1433                 }
1434
1435                 return $ret;
1436         }
1437
1438         /**
1439          * Gets a log message to describe the given revision visibility change. This
1440          * message will be of the form "[hid {content, edit summary, username}];
1441          * [unhid {...}][applied restrictions to sysops] for $count revisions: $comment".
1442          *
1443          * @param int $count The number of effected revisions.
1444          * @param int $nbitfield The new bitfield for the revision.
1445          * @param int $obitfield The old bitfield for the revision.
1446          * @param string $comment The comment associated with the change.
1447          * @param bool $isForLog
1448          */
1449         function getLogMessage ( $count, $nbitfield, $obitfield, $comment, $isForLog = false ) {
1450                 global $wgContLang;
1451
1452                 $s = '';
1453                 $changes = $this->getChanges( $nbitfield, $obitfield );
1454
1455                 if ( count ( $changes[0] ) ) {
1456                         $s .= wfMsgForContent ( 'revdelete-hid', implode ( ', ', $changes[0] ) );
1457                 }
1458
1459                 if ( count ( $changes[1] ) ) {
1460                         if ($s) $s .= '; ';
1461
1462                         $s .= wfMsgForContent ( 'revdelete-unhid', implode ( ', ', $changes[1] ) );
1463                 }
1464
1465                 if ( count ( $changes[2] )) {
1466                         if ($s)
1467                                 $s .= ' (' . $changes[2][0] . ')';
1468                         else
1469                                 $s = $changes[2][0];
1470                 }
1471
1472                 $msg = $isForLog ? 'logdelete-log-message' : 'revdelete-log-message';
1473                 $ret = wfMsgExt ( $msg, array( 'parsemag', 'content' ),
1474                         $s, $wgContLang->formatNum( $count ) );
1475
1476                 if ( $comment )
1477                         $ret .= ": $comment";
1478
1479                 return $ret;
1480
1481         }
1482
1483         /**
1484          * Record a log entry on the action
1485          * @param Title $title, page where item was removed from
1486          * @param int $count the number of revisions altered for this page
1487          * @param int $nbitfield the new _deleted value
1488          * @param int $obitfield the old _deleted value
1489          * @param string $comment
1490          * @param Title $target, the relevant page
1491          * @param string $param, URL param
1492          * @param Array $items
1493          */
1494         function updateLog( $title, $count, $nbitfield, $obitfield, $comment, $target, $param, $items = array() ) {
1495                 // Put things hidden from sysops in the oversight log
1496                 $logtype = ( ($nbitfield | $obitfield) & Revision::DELETED_RESTRICTED ) ? 'suppress' : 'delete';
1497                 $log = new LogPage( $logtype );
1498
1499                 $reason = $this->getLogMessage ( $count, $nbitfield, $obitfield, $comment, $param == 'logid' );
1500
1501                 if( $param == 'logid' ) {
1502                         $params = array( implode( ',', $items) );
1503                         $log->addEntry( 'event', $title, $reason, $params );
1504                 } else {
1505                         // Add params for effected page and ids
1506                         $params = array( $param, implode( ',', $items) );
1507                         $log->addEntry( 'revision', $title, $reason, $params );
1508                 }
1509         }
1510 }