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         /** Skin object */
  12         var $skin;
  13
  14         /** True if the submit button was clicked, and the form was posted */
  15         var $submitClicked;
  16
  17         /** Target ID list */
  18         var $ids;
  19
  20         /** Archive name, for reviewing deleted files */
  21         var $archiveName;
  22
  23         /** Edit token for securing image views against XSS */
  24         var $token;
  25
  26         /** Title object for target parameter */
  27         var $targetObj;
  28
  29         /** Deletion type, may be revision, archive, oldimage, filearchive, logging. */
  30         var $typeName;
  31
  32         /** Array of checkbox specs (message, name, deletion bits) */
  33         var $checks;
  34
  35         /** Information about the current type */
  36         var $typeInfo;
  37
  38         /** The RevDel_List object, storing the list of items to be deleted/undeleted */
  39         var $list;
  40
  41         /**
  42          * Assorted information about each type, needed by the special page.
  43          * TODO Move some of this to the list class
  44          */
  45         static $allowedTypes = array(
  46                 'revision' => array(
  47                         'check-label' => 'revdelete-hide-text',
  48                         'deletion-bits' => Revision::DELETED_TEXT,
  49                         'success' => 'revdelete-success',
  50                         'failure' => 'revdelete-failure',
  51                         'list-class' => 'RevDel_RevisionList',
  52                 ),
  53                 'archive' => array(
  54                         'check-label' => 'revdelete-hide-text',
  55                         'deletion-bits' => Revision::DELETED_TEXT,
  56                         'success' => 'revdelete-success',
  57                         'failure' => 'revdelete-failure',
  58                         'list-class' => 'RevDel_ArchiveList',
  59                 ),
  60                 'oldimage'=> array(
  61                         'check-label' => 'revdelete-hide-image',
  62                         'deletion-bits' => File::DELETED_FILE,
  63                         'success' => 'revdelete-success',
  64                         'failure' => 'revdelete-failure',
  65                         'list-class' => 'RevDel_FileList',
  66                 ),
  67                 'filearchive' => array(
  68                         'check-label' => 'revdelete-hide-image',
  69                         'deletion-bits' => File::DELETED_FILE,
  70                         'success' => 'revdelete-success',
  71                         'failure' => 'revdelete-failure',
  72                         'list-class' => 'RevDel_ArchivedFileList',
  73                 ),
  74                 'logging' => array(
  75                         'check-label' => 'revdelete-hide-name',
  76                         'deletion-bits' => LogPage::DELETED_ACTION,
  77                         'success' => 'logdelete-success',
  78                         'failure' => 'logdelete-failure',
  79                         'list-class' => 'RevDel_LogList',
  80                 ),
  81         );
  82
  83         /** Type map to support old log entries */
  84         static $deprecatedTypeMap = array(
  85                 'oldid' => 'revision',
  86                 'artimestamp' => 'archive',
  87                 'oldimage' => 'oldimage',
  88                 'fileid' => 'filearchive',
  89                 'logid' => 'logging',
  90         );
  91
  92         public function __construct() {
  93                 parent::__construct( 'Revisiondelete', 'deleterevision' );
  94         }
  95
  96         public function execute( $par ) {
  97                 global $wgOut, $wgUser, $wgRequest;
  98                 if( !$wgUser->isAllowed( 'deleterevision' ) ) {
  99                         $wgOut->permissionRequired( 'deleterevision' );
 100                         return;
 101                 } else if( wfReadOnly() ) {
 102                         $wgOut->readOnlyPage();
 103                         return;
 104                 }
 105                 $this->skin = $wgUser->getSkin();
 106                 $this->setHeaders();
 107                 $this->outputHeader();
 108                 $this->submitClicked = $wgRequest->wasPosted() && $wgRequest->getBool( 'wpSubmit' );
 109                 # Handle our many different possible input types.
 110                 # Use CSV, since the cgi handling will break on arrays.
 111                 $this->ids = explode( ',', $wgRequest->getVal('ids') );
 112                 $this->ids = array_unique( array_filter( $this->ids ) );
 113                 $this->targetObj = Title::newFromText( $wgRequest->getText( 'target' ) );
 114
 115                 # For reviewing deleted files...
 116                 $this->archiveName = $wgRequest->getVal( 'file' );
 117                 $this->token = $wgRequest->getVal( 'token' );
 118                 if ( $this->archiveName && $this->targetObj ) {
 119                         $this->tryShowFile( $this->archiveName );
 120                         return;
 121                 }
 122
 123                 $this->typeName = $wgRequest->getVal( 'type' );
 124                 if ( isset( self::$deprecatedTypeMap[$this->typeName] ) ) {
 125                         $this->typeName = self::$deprecatedTypeMap[$this->typeName];
 126                 }
 127
 128                 # No targets?
 129                 if( !isset( self::$allowedTypes[$this->typeName] ) || count( $this->ids ) == 0 ) {
 130                         $wgOut->showErrorPage( 'revdelete-nooldid-title', 'revdelete-nooldid-text' );
 131                         return;
 132                 }
 133                 $this->typeInfo = self::$allowedTypes[$this->typeName];
 134
 135                 # If we have revisions, get the title from the first one
 136                 # since they should all be from the same page. This allows
 137                 # for more flexibility with page moves...
 138                 if( $this->typeName == 'revision' ) {
 139                         $rev = Revision::newFromId( $this->ids[0] );
 140                         $this->targetObj = $rev ? $rev->getTitle() : $this->targetObj;
 141                 }
 142                 # We need a target page!
 143                 if( is_null($this->targetObj) ) {
 144                         $wgOut->addWikiMsg( 'undelete-header' );
 145                         return;
 146                 }
 147                 # Give a link to the logs/hist for this page
 148                 $this->showConvenienceLinks();
 149
 150                 # Initialise checkboxes
 151                 $this->checks = array(
 152                         array( $this->typeInfo['check-label'], 'wpHidePrimary', $this->typeInfo['deletion-bits'] ),
 153                         array( 'revdelete-hide-comment', 'wpHideComment', Revision::DELETED_COMMENT ),
 154                         array( 'revdelete-hide-user', 'wpHideUser', Revision::DELETED_USER )
 155                 );
 156                 if( $wgUser->isAllowed('suppressrevision') ) {
 157                         $this->checks[] = array( 'revdelete-hide-restricted',
 158                                 'wpHideRestricted', Revision::DELETED_RESTRICTED );
 159                 }
 160
 161                 # Either submit or create our form
 162                 if( $this->submitClicked ) {
 163                         $this->submit( $wgRequest );
 164                 } else {
 165                         $this->showForm();
 166                 }
 167                 $qc = $this->getLogQueryCond();
 168                 # Show relevant lines from the deletion log
 169                 $wgOut->addHTML( "<h2>" . htmlspecialchars( LogPage::logName( 'delete' ) ) . "</h2>\n" );
 170                 LogEventsList::showLogExtract( $wgOut, 'delete',
 171                         $this->targetObj->getPrefixedText(), '', 25, $qc );
 172                 # Show relevant lines from the suppression log
 173                 if( $wgUser->isAllowed( 'suppressionlog' ) ) {
 174                         $wgOut->addHTML( "<h2>" . htmlspecialchars( LogPage::logName( 'suppress' ) ) . "</h2>\n" );
 175                         LogEventsList::showLogExtract( $wgOut, 'suppress',
 176                                 $this->targetObj->getPrefixedText(), '', 25, $qc );
 177                 }
 178         }
 179
 180         /**
 181          * Show some useful links in the subtitle
 182          */
 183         protected function showConvenienceLinks() {
 184                 global $wgOut, $wgUser;
 185                 # Give a link to the logs/hist for this page
 186                 if( $this->targetObj ) {
 187                         $links = array();
 188                         $logtitle = SpecialPage::getTitleFor( 'Log' );
 189                         $links[] = $this->skin->linkKnown(
 190                                 $logtitle,
 191                                 wfMsgHtml( 'viewpagelogs' ),
 192                                 array(),
 193                                 array( 'page' => $this->targetObj->getPrefixedUrl() )
 194                         );
 195                         # Give a link to the page history
 196                         $links[] = $this->skin->linkKnown(
 197                                 $this->targetObj,
 198                                 wfMsgHtml( 'pagehist' ),
 199                                 array(),
 200                                 array( 'action' => 'history' )
 201                         );
 202                         # Link to deleted edits
 203                         if( $wgUser->isAllowed('undelete') ) {
 204                                 $undelete = SpecialPage::getTitleFor( 'Undelete' );
 205                                 $links[] = $this->skin->linkKnown(
 206                                         $undelete,
 207                                         wfMsgHtml( 'deletedhist' ),
 208                                         array(),
 209                                         array( 'target' => $this->targetObj->getPrefixedDBkey() )
 210                                 );
 211                         }
 212                         # Logs themselves don't have histories or archived revisions
 213                         $wgOut->setSubtitle( '<p>'.implode($links,' / ').'</p>' );
 214                 }
 215         }
 216
 217         /**
 218          * Get the condition used for fetching log snippets
 219          */
 220         protected function getLogQueryCond() {
 221                 $conds = array();
 222                 // Revision delete logs for these item
 223                 $conds['log_type'] = array('delete','suppress');
 224                 $conds['log_action'] = $this->getList()->getLogAction();
 225                 $conds['ls_field'] = RevisionDeleter::getRelationType( $this->typeName );
 226                 $conds['ls_value'] = $this->ids;
 227                 return $conds;
 228         }
 229
 230         /**
 231          * Show a deleted file version requested by the visitor.
 232          * TODO Mostly copied from Special:Undelete. Refactor.
 233          */
 234         protected function tryShowFile( $archiveName ) {
 235                 global $wgOut, $wgRequest, $wgUser, $wgLang;
 236
 237                 $repo = RepoGroup::singleton()->getLocalRepo();
 238                 $oimage = $repo->newFromArchiveName( $this->targetObj, $archiveName );
 239                 $oimage->load();
 240                 // Check if user is allowed to see this file
 241                 if ( !$oimage->exists() ) {
 242                         $wgOut->addWikiMsg( 'revdelete-no-file' );
 243                         return;
 244                 }
 245                 if( !$oimage->userCan(File::DELETED_FILE) ) {
 246                         $wgOut->permissionRequired( 'suppressrevision' );
 247                         return;
 248                 }
 249                 if ( !$wgUser->matchEditToken( $this->token, $archiveName ) ) {
 250                         $wgOut->addWikiMsg( 'revdelete-show-file-confirm',
 251                                 $this->targetObj->getText(),
 252                                 $wgLang->date( $oimage->getTimestamp() ),
 253                                 $wgLang->time( $oimage->getTimestamp() ) );
 254                         $wgOut->addHTML(
 255                                 Xml::openElement( 'form', array(
 256                                         'method' => 'POST',
 257                                         'action' => $this->getTitle()->getLocalUrl(
 258                                                 'target=' . urlencode( $oimage->getName() ) .
 259                                                 '&file=' . urlencode( $archiveName ) .
 260                                                 '&token=' . urlencode( $wgUser->editToken( $archiveName ) ) )
 261                                         )
 262                                 ) .
 263                                 Xml::submitButton( wfMsg( 'revdelete-show-file-submit' ) ) .
 264                                 '</form>'
 265                         );
 266                         return;
 267                 }
 268                 $wgOut->disable();
 269                 # We mustn't allow the output to be Squid cached, otherwise
 270                 # if an admin previews a deleted image, and it's cached, then
 271                 # a user without appropriate permissions can toddle off and
 272                 # nab the image, and Squid will serve it
 273                 $wgRequest->response()->header( 'Expires: ' . gmdate( 'D, d M Y H:i:s', 0 ) . ' GMT' );
 274                 $wgRequest->response()->header( 'Cache-Control: no-cache, no-store, max-age=0, must-revalidate' );
 275                 $wgRequest->response()->header( 'Pragma: no-cache' );
 276
 277                 # Stream the file to the client
 278                 global $IP;
 279                 require_once( "$IP/includes/StreamFile.php" );
 280                 $key = $oimage->getStorageKey();
 281                 $path = $repo->getZonePath( 'deleted' ) . '/' . $repo->getDeletedHashPath( $key ) . $key;
 282                 wfStreamFile( $path );
 283         }
 284
 285         /**
 286          * Get the list object for this request
 287          */
 288         protected function getList() {
 289                 if ( is_null( $this->list ) ) {
 290                         $class = $this->typeInfo['list-class'];
 291                         $this->list = new $class( $this, $this->targetObj, $this->ids );
 292                 }
 293                 return $this->list;
 294         }
 295
 296         /**
 297          * Show a list of items that we will operate on, and show a form with checkboxes
 298          * which will allow the user to choose new visibility settings.
 299          */
 300         protected function showForm() {
 301                 global $wgOut, $wgUser, $wgLang;
 302                 $UserAllowed = true;
 303
 304                 if ( $this->typeName == 'logging' ) {
 305                         $wgOut->addWikiMsg( 'logdelete-selected', $wgLang->formatNum( count($this->ids) ) );
 306                 } else {
 307                         $wgOut->addWikiMsg( 'revdelete-selected',
 308                                 $this->targetObj->getPrefixedText(), count( $this->ids ) );
 309                 }
 310
 311                 $bitfields = 0;
 312                 $wgOut->addHTML( "<ul>" );
 313
 314                 $where = $revObjs = array();
 315
 316                 $numRevisions = 0;
 317                 // Live revisions...
 318                 $list = $this->getList();
 319                 for ( $list->reset(); $list->current(); $list->next() ) {
 320                         $item = $list->current();
 321                         if ( !$item->canView() ) {
 322                                 if( !$this->submitClicked ) {
 323                                         $wgOut->permissionRequired( 'suppressrevision' );
 324                                         return;
 325                                 }
 326                                 $UserAllowed = false;
 327                         }
 328                         $numRevisions++;
 329                         $bitfields |= $item->getBits();
 330                         $wgOut->addHTML( $item->getHTML() );
 331                 }
 332
 333                 if( !$numRevisions ) {
 334                         $wgOut->showErrorPage( 'revdelete-nooldid-title', 'revdelete-nooldid-text' );
 335                         return;
 336                 }
 337
 338                 $wgOut->addHTML( "</ul>" );
 339                 // Explanation text
 340                 $this->addUsageText();
 341
 342                 // Normal sysops can always see what they did, but can't always change it
 343                 if( !$UserAllowed ) return;
 344
 345                 $wgOut->addHTML(
 346                         Xml::openElement( 'form', array( 'method' => 'post',
 347                                 'action' => $this->getTitle()->getLocalUrl( array( 'action' => 'submit' ) ),
 348                                 'id' => 'mw-revdel-form-revisions' ) ) .
 349                         Xml::openElement( 'fieldset' ) .
 350                         Xml::element( 'legend', null,  wfMsg( 'revdelete-legend' ) ) .
 351                         $this->buildCheckBoxes( $bitfields ) .
 352                         '<p>' . Xml::inputLabel( wfMsg( 'revdelete-log' ), 'wpReason', 'wpReason', 60 ) . '</p>' .
 353                         '<p>' . Xml::submitButton( wfMsg( 'revdelete-submit' ),
 354                                 array( 'name' => 'wpSubmit' ) ) . '</p>' .
 355                         Xml::hidden( 'wpEditToken', $wgUser->editToken() ) .
 356                         Xml::hidden( 'target', $this->targetObj->getPrefixedText() ) .
 357                         Xml::hidden( 'type', $this->typeName ) .
 358                         Xml::hidden( 'ids', implode( ',', $this->ids ) ) .
 359                         Xml::closeElement( 'fieldset' ) .
 360                         Xml::closeElement( 'form' ) . "\n"
 361                 );
 362         }
 363
 364         /**
 365          * Show some introductory text
 366          * FIXME Wikimedia-specific policy text
 367          */
 368         protected function addUsageText() {
 369                 global $wgOut, $wgUser;
 370                 $wgOut->addWikiMsg( 'revdelete-text' );
 371                 if( $wgUser->isAllowed( 'suppressrevision' ) ) {
 372                         $wgOut->addWikiMsg( 'revdelete-suppress-text' );
 373                 }
 374         }
 375
 376         /**
 377         * @param $bitfields Interger: aggregate bitfield of all the bitfields
 378         * @return String: HTML
 379         */
 380         protected function buildCheckBoxes( $bitfields ) {
 381                 $html = '';
 382                 // FIXME: all items checked for just one rev are checked, even if not set for the others
 383                 foreach( $this->checks as $item ) {
 384                         list( $message, $name, $field ) = $item;
 385                         $line = Xml::tags( 'div', null, Xml::checkLabel( wfMsg($message), $name, $name,
 386                                 $bitfields & $field ) );
 387                         if( $field == Revision::DELETED_RESTRICTED ) $line = "<b>$line</b>";
 388                         $html .= $line;
 389                 }
 390                 return $html;
 391         }
 392
 393         /**
 394          * UI entry point for form submission.
 395          * @param $request WebRequest
 396          */
 397         protected function submit( $request ) {
 398                 global $wgUser, $wgOut;
 399                 # Check edit token on submission
 400                 if( $this->submitClicked && !$wgUser->matchEditToken( $request->getVal('wpEditToken') ) ) {
 401                         $wgOut->addWikiMsg( 'sessionfailure' );
 402                         return false;
 403                 }
 404                 $bitfield = $this->extractBitfield( $request );
 405                 $comment = $request->getText( 'wpReason' );
 406                 # Can the user set this field?
 407                 if( $bitfield & Revision::DELETED_RESTRICTED && !$wgUser->isAllowed('suppressrevision') ) {
 408                         $wgOut->permissionRequired( 'suppressrevision' );
 409                         return false;
 410                 }
 411                 # If the save went through, go to success message...
 412                 $status = $this->save( $bitfield, $comment, $this->targetObj );
 413                 if ( $status->isGood() ) {
 414                         $this->success();
 415                         return true;
 416                 # ...otherwise, bounce back to form...
 417                 } else {
 418                         $this->failure( $status );
 419                 }
 420                 return false;
 421         }
 422
 423         /**
 424          * Report that the submit operation succeeded
 425          */
 426         protected function success() {
 427                 global $wgOut;
 428                 $wgOut->setPagetitle( wfMsg( 'actioncomplete' ) );
 429                 $wgOut->wrapWikiMsg( '<span class="success">$1</span>', $this->typeInfo['success'] );
 430                 $this->list->reloadFromMaster();
 431                 $this->showForm();
 432         }
 433
 434         /**
 435          * Report that the submit operation failed
 436          */
 437         protected function failure( $status ) {
 438                 global $wgOut;
 439                 $wgOut->setPagetitle( wfMsg( 'actionfailed' ) );
 440                 $wgOut->addWikiText( $status->getWikiText( $this->typeInfo['failure'] ) );
 441                 $this->showForm();
 442         }
 443
 444         /**
 445          * Put together a rev_deleted bitfield from the submitted checkboxes
 446          * @param $request WebRequest
 447          * @return Integer
 448          */
 449         protected function extractBitfield( $request ) {
 450                 $bitfield = 0;
 451                 foreach( $this->checks as $item ) {
 452                         list( /* message */ , $name, $field ) = $item;
 453                         if( $request->getCheck( $name ) ) {
 454                                 $bitfield |= $field;
 455                         }
 456                 }
 457                 return $bitfield;
 458         }
 459
 460         /**
 461          * Do the write operations. Simple wrapper for RevDel_*List::setVisibility().
 462          */
 463         protected function save( $bitfield, $reason, $title ) {
 464                 // Don't allow simply locking the interface for no reason
 465                 if( $bitfield == Revision::DELETED_RESTRICTED ) {
 466                         return Status::newFatal( 'revdelete-only-restricted' );
 467                 }
 468                 return $this->getList()->setVisibility( array(
 469                         'value' => $bitfield,
 470                         'comment' => $reason ) );
 471         }
 472 }
 473
 474 /**
 475  * Temporary b/c interface, collection of static functions.
 476  * @ingroup SpecialPage
 477  */
 478 class RevisionDeleter {
 479         /**
 480          * Checks for a change in the bitfield for a certain option and updates the
 481          * provided array accordingly.
 482          *
 483          * @param $desc String: description to add to the array if the option was
 484          * enabled / disabled.
 485          * @param $field Integer: the bitmask describing the single option.
 486          * @param $diff Integer: the xor of the old and new bitfields.
 487          * @param $new Integer: the new bitfield
 488          * @param $arr Array: the array to update.
 489          */
 490         protected static function checkItem( $desc, $field, $diff, $new, &$arr ) {
 491                 if( $diff & $field ) {
 492                         $arr[ ( $new & $field ) ? 0 : 1 ][] = $desc;
 493                 }
 494         }
 495
 496         /**
 497          * Gets an array describing the changes made to the visibilit of the revision.
 498          * If the resulting array is $arr, then $arr[0] will contain an array of strings
 499          * describing the items that were hidden, $arr[2] will contain an array of strings
 500          * describing the items that were unhidden, and $arr[3] will contain an array with
 501          * a single string, which can be one of "applied restrictions to sysops",
 502          * "removed restrictions from sysops", or null.
 503          *
 504          * @param $n Integer: the new bitfield.
 505          * @param $o Integer: the old bitfield.
 506          * @return An array as described above.
 507          */
 508         protected static function getChanges( $n, $o ) {
 509                 $diff = $n ^ $o;
 510                 $ret = array( 0 => array(), 1 => array(), 2 => array() );
 511                 // Build bitfield changes in language
 512                 self::checkItem( wfMsgForContent( 'revdelete-content' ),
 513                         Revision::DELETED_TEXT, $diff, $n, $ret );
 514                 self::checkItem( wfMsgForContent( 'revdelete-summary' ),
 515                         Revision::DELETED_COMMENT, $diff, $n, $ret );
 516                 self::checkItem( wfMsgForContent( 'revdelete-uname' ),
 517                         Revision::DELETED_USER, $diff, $n, $ret );
 518                 // Restriction application to sysops
 519                 if( $diff & Revision::DELETED_RESTRICTED ) {
 520                         if( $n & Revision::DELETED_RESTRICTED )
 521                                 $ret[2][] = wfMsgForContent( 'revdelete-restricted' );
 522                         else
 523                                 $ret[2][] = wfMsgForContent( 'revdelete-unrestricted' );
 524                 }
 525                 return $ret;
 526         }
 527
 528         /**
 529          * Gets a log message to describe the given revision visibility change. This
 530          * message will be of the form "[hid {content, edit summary, username}];
 531          * [unhid {...}][applied restrictions to sysops] for $count revisions: $comment".
 532          *
 533          * @param $count Integer: The number of effected revisions.
 534          * @param $nbitfield Integer: The new bitfield for the revision.
 535          * @param $obitfield Integer: The old bitfield for the revision.
 536          * @param $isForLog Boolean
 537          */
 538         public static function getLogMessage( $count, $nbitfield, $obitfield, $isForLog = false ) {
 539                 global $wgLang;
 540                 $s = '';
 541                 $changes = self::getChanges( $nbitfield, $obitfield );
 542                 if( count( $changes[0] ) ) {
 543                         $s .= wfMsgForContent( 'revdelete-hid', implode( ', ', $changes[0] ) );
 544                 }
 545                 if( count( $changes[1] ) ) {
 546                         if ($s) $s .= '; ';
 547                         $s .= wfMsgForContent( 'revdelete-unhid', implode( ', ', $changes[1] ) );
 548                 }
 549                 if( count( $changes[2] ) ) {
 550                         $s .= $s ? ' (' . $changes[2][0] . ')' : $changes[2][0];
 551                 }
 552                 $msg = $isForLog ? 'logdelete-log-message' : 'revdelete-log-message';
 553                 return wfMsgExt( $msg, array( 'parsemag', 'content' ), $s, $wgLang->formatNum($count) );
 554
 555         }
 556
 557         // Get DB field name for URL param...
 558         // Future code for other things may also track
 559         // other types of revision-specific changes.
 560         public static function getRelationType( $typeName ) {
 561                 if ( isset( SpecialRevisionDelete::$deprecatedTypeMap[$typeName] ) ) {
 562                         $typeName = SpecialRevisionDelete::$deprecatedTypeMap[$typeName];
 563                 }
 564                 if ( isset( SpecialRevisionDelete::$allowedTypes[$typeName] ) ) {
 565                         $class = SpecialRevisionDelete::$allowedTypes[$typeName]['list-class'];
 566                         $list = new $class( null, null, null );
 567                         return $list->getIdField();
 568                 } else {
 569                         return null;
 570                 }
 571         }
 572 }
 573
 574 /**
 575  * Abstract base class for a list of deletable items
 576  */
 577 abstract class RevDel_List {
 578         var $special, $title, $ids, $res, $current;
 579         var $type = null; // override this
 580         var $idField = null; // override this
 581         var $dateField = false; // override this
 582
 583         /**
 584          * @param $special The parent SpecialPage
 585          * @param $title The target title
 586          * @param $ids Array of IDs
 587          */
 588         public function __construct( $special, $title, $ids ) {
 589                 $this->special = $special;
 590                 $this->title = $title;
 591                 $this->ids = $ids;
 592         }
 593
 594         /**
 595          * Get the internal type name of this list. Equal to the table name.
 596          */
 597         public function getType() {
 598                 return $this->type;
 599         }
 600
 601         /**
 602          * Get the DB field name associated with the ID list/
 603          */
 604         public function getIdField() {
 605                 return $this->idField;
 606         }
 607
 608         /**
 609          * Get the DB field name storing timestamps
 610          */
 611         public function getTimestampField() {
 612                 return $this->dateField;
 613         }
 614
 615         /**
 616          * Set the visibility for the revisions in this list. Logging and
 617          * transactions are done here.
 618          *
 619          * @param $params Associative array of parameters. Members are:
 620          *     value:       The integer value to set the visibility to
 621          *     comment:     The log comment.
 622          * @return Status
 623          */
 624         public function setVisibility( $params ) {
 625                 $newBits = $params['value'];
 626                 $comment = $params['comment'];
 627
 628                 $this->res = false;
 629                 $dbw = wfGetDB( DB_MASTER );
 630                 $this->doQuery( $dbw );
 631                 $dbw->begin();
 632                 $status = Status::newGood();
 633                 $missing = array_flip( $this->ids );
 634                 $this->clearFileOps();
 635                 $idsForLog = array();
 636
 637                 for ( $this->reset(); $this->current(); $this->next() ) {
 638                         $item = $this->current();
 639                         unset( $missing[ $item->getId() ] );
 640
 641                         // Make error messages less vague
 642                         $oldBits = $item->getBits();
 643                         if ( $oldBits == $newBits ) {
 644                                 $status->warning( 'revdelete-no-change', $item->formatDate(), $item->formatTime() );
 645                                 $status->failCount++;
 646                                 continue;
 647                         } elseif ( $oldBits == 0 && $newBits != 0 ) {
 648                                 $opType = 'hide';
 649                         } elseif ( $oldBits != 0 && $newBits == 0 ) {
 650                                 $opType = 'show';
 651                         } else {
 652                                 $opType = 'modify';
 653                         }
 654
 655                         if ( $item->isHideCurrentOp( $newBits ) ) {
 656                                 // Cannot hide current version text
 657                                 $status->error( 'revdelete-hide-current', $item->formatDate(), $item->formatTime() );
 658                                 $status->failCount++;
 659                                 continue;
 660                         }
 661                         if ( !$item->canView() ) {
 662                                 // Cannot access this revision
 663                                 $msg = $opType == 'show' ? 'revdelete-show-no-access' : 'revdelete-modify-no-access';
 664                                 $status->error( $msg, $item->formatDate(), $item->formatTime() );
 665                                 $status->failCount++;
 666                                 continue;
 667                         }
 668
 669                         // Update the revision
 670                         $ok = $item->setBits( $newBits );
 671
 672                         if ( $ok ) {
 673                                 $idsForLog[] = $item->getId();
 674                                 $status->successCount++;
 675                         } else {
 676                                 $status->error( 'revdelete-concurrent-change', $item->formatDate(), $item->formatTime() );
 677                                 $status->failCount++;
 678                         }
 679                 }
 680
 681                 // Handle missing revisions
 682                 foreach ( $missing as $id => $unused ) {
 683                         $status->error( 'revdelete-modify-missing', $id );
 684                         $status->failCount++;
 685                 }
 686
 687                 if ( $status->successCount == 0 ) {
 688                         $status->ok = false;
 689                         $dbw->rollback();
 690                         return $status;
 691                 }
 692
 693                 // Save success count
 694                 $successCount = $status->successCount;
 695
 696                 // Move files, if there are any
 697                 $status->merge( $this->doPreCommitUpdates() );
 698                 if ( !$status->isOK() ) {
 699                         // Fatal error, such as no configured archive directory
 700                         $dbw->rollback();
 701                         return $status;
 702                 }
 703
 704                 // Log it
 705                 $this->updateLog( array(
 706                         'title' => $this->title,
 707                         'count' => $successCount,
 708                         'newBits' => $newBits,
 709                         'oldBits' => $oldBits,
 710                         'comment' => $comment,
 711                         'ids' => $idsForLog,
 712                 ) );
 713                 $dbw->commit();
 714
 715                 // Clear caches
 716                 $status->merge( $this->doPostCommitUpdates() );
 717                 return $status;
 718         }
 719
 720         /**
 721          * Reload the list data from the master DB. This can be done after setVisibility()
 722          * to allow $item->getHTML() to show the new data.
 723          */
 724         function reloadFromMaster() {
 725                 $dbw = wfGetDB( DB_MASTER );
 726                 $this->res = $this->doQuery( $dbw );
 727         }
 728
 729         /**
 730          * Record a log entry on the action
 731          * @param $params Associative array of parameters:
 732          *     newBits:         The new value of the *_deleted bitfield
 733          *     oldBits:         The old value of the *_deleted bitfield.
 734          *     title:           The target title
 735          *     ids:             The ID list
 736          *     comment:         The log comment
 737          */
 738         protected function updateLog( $params ) {
 739                 // Get the URL param's corresponding DB field
 740                 $field = RevisionDeleter::getRelationType( $this->getType() );
 741                 if( !$field ) {
 742                         throw new MWException( "Bad log URL param type!" );
 743                 }
 744                 // Put things hidden from sysops in the oversight log
 745                 if ( ( $params['newBits'] | $params['oldBits'] ) & $this->getSuppressBit() ) {
 746                         $logType = 'suppress';
 747                 } else {
 748                         $logType = 'delete';
 749                 }
 750                 // Add params for effected page and ids
 751                 $logParams = $this->getLogParams( $params );
 752                 // Actually add the deletion log entry
 753                 $log = new LogPage( $logType );
 754                 $logid = $log->addEntry( $this->getLogAction(), $params['title'],
 755                         $params['comment'], $logParams );
 756                 // Allow for easy searching of deletion log items for revision/log items
 757                 $log->addRelations( $field, $params['ids'], $logid );
 758         }
 759
 760         /**
 761          * Get the log action for this list type
 762          */
 763         public function getLogAction() {
 764                 return 'revision';
 765         }
 766
 767         /**
 768          * Get log parameter array.
 769          * @param $params Associative array of log parameters, same as updateLog()
 770          * @return array
 771          */
 772         public function getLogParams( $params ) {
 773                 return array(
 774                         $this->getType(),
 775                         implode( ',', $params['ids'] ),
 776                         "ofield={$params['oldBits']}",
 777                         "nfield={$params['newBits']}"
 778                 );
 779         }
 780
 781         /**
 782          * Initialise the current iteration pointer
 783          */
 784         protected function initCurrent() {
 785                 $row = $this->res->current();
 786                 if ( $row ) {
 787                         $this->current = $this->newItem( $row );
 788                 } else {
 789                         $this->current = false;
 790                 }
 791         }
 792
 793         /**
 794          * Start iteration. This must be called before current() or next().
 795          * @return First list item
 796          */
 797         public function reset() {
 798                 if ( !$this->res ) {
 799                         $this->res = $this->doQuery( wfGetDB( DB_SLAVE ) );
 800                 } else {
 801                         $this->res->rewind();
 802                 }
 803                 $this->initCurrent();
 804                 return $this->current;
 805         }
 806
 807         /**
 808          * Get the current list item, or false if we are at the end
 809          */
 810         public function current() {
 811                 return $this->current;
 812         }
 813
 814         /**
 815          * Move the iteration pointer to the next list item, and return it.
 816          */
 817         public function next() {
 818                 $this->res->next();
 819                 $this->initCurrent();
 820                 return $this->current;
 821         }
 822
 823         /**
 824          * Clear any data structures needed for doPreCommitUpdates() and doPostCommitUpdates()
 825          * STUB
 826          */
 827         public function clearFileOps() {
 828         }
 829
 830         /**
 831          * A hook for setVisibility(): do batch updates pre-commit.
 832          * STUB
 833          * @return Status
 834          */
 835         public function doPreCommitUpdates() {
 836                 return Status::newGood();
 837         }
 838
 839         /**
 840          * A hook for setVisibility(): do any necessary updates post-commit.
 841          * STUB
 842          * @return Status
 843          */
 844         public function doPostCommitUpdates() {
 845                 return Status::newGood();
 846         }
 847
 848         /**
 849          * Create an item object from a DB result row
 850          * @param $row stdclass
 851          */
 852         abstract public function newItem( $row );
 853
 854         /**
 855          * Do the DB query to iterate through the objects.
 856          * @param $db Database object to use for the query
 857          */
 858         abstract public function doQuery( $db );
 859
 860         /**
 861          * Get the integer value of the flag used for suppression
 862          */
 863         abstract public function getSuppressBit();
 864 }
 865
 866 /**
 867  * Abstract base class for deletable items
 868  */
 869 abstract class RevDel_Item {
 870         /** The parent SpecialPage */
 871         var $special;
 872
 873         /** The parent RevDel_List */
 874         var $list;
 875
 876         /** The DB result row */
 877         var $row;
 878
 879         /**
 880          * @param $list RevDel_List
 881          * @param $row DB result row
 882          */
 883         public function __construct( $list, $row ) {
 884                 $this->special = $list->special;
 885                 $this->list = $list;
 886                 $this->row = $row;
 887         }
 888
 889         /**
 890          * Get the ID, as it would appear in the ids URL parameter
 891          */
 892         public function getId() {
 893                 $field = $this->list->getIdField();
 894                 return $this->row->$field;
 895         }
 896
 897         /**
 898          * Get the date, formatted with $wgLang
 899          */
 900         public function formatDate() {
 901                 global $wgLang;
 902                 return $wgLang->date( $this->getTimestamp() );
 903         }
 904
 905         /**
 906          * Get the time, formatted with $wgLang
 907          */
 908         public function formatTime() {
 909                 global $wgLang;
 910                 return $wgLang->time( $this->getTimestamp() );
 911         }
 912
 913         /**
 914          * Get the timestamp in MW 14-char form
 915          */
 916         public function getTimestamp() {
 917                 $field = $this->list->getTimestampField();
 918                 return wfTimestamp( TS_MW, $this->row->$field );
 919         }
 920
 921         /**
 922          * Returns true if the item is "current", and the operation to set the given
 923          * bits can't be executed for that reason
 924          * STUB
 925          */
 926         public function isHideCurrentOp( $newBits ) {
 927                 return false;
 928         }
 929
 930         /**
 931          * Returns true if the current user can view the item
 932          */
 933         abstract public function canView();
 934
 935         /**
 936          * Get the current deletion bitfield value
 937          */
 938         abstract public function getBits();
 939
 940         /**
 941          * Get the HTML of the list item. Should be include <li></li> tags.
 942          * This is used to show the list in HTML form, by the special page.
 943          */
 944         abstract public function getHTML();
 945
 946         /**
 947          * Set the visibility of the item. This should do any necessary DB queries.
 948          *
 949          * The DB update query should have a condition which forces it to only update
 950          * if the value in the DB matches the value fetched earlier with the SELECT.
 951          * If the update fails because it did not match, the function should return
 952          * false. This prevents concurrency problems.
 953          *
 954          * @return boolean success
 955          */
 956         abstract public function setBits( $newBits );
 957 }
 958
 959 /**
 960  * List for revision table items
 961  */
 962 class RevDel_RevisionList extends RevDel_List {
 963         var $currentRevId;
 964         var $type = 'revision';
 965         var $idField = 'rev_id';
 966         var $dateField = 'rev_timestamp';
 967
 968         public function doQuery( $db ) {
 969                 $ids = array_map( 'intval', $this->ids );
 970                 return $db->select( array('revision','page'), '*',
 971                         array(
 972                                 'rev_page' => $this->title->getArticleID(),
 973                                 'rev_id'   => $ids,
 974                                 'rev_page = page_id'
 975                         ),
 976                         __METHOD__
 977                 );
 978         }
 979
 980         public function newItem( $row ) {
 981                 return new RevDel_RevisionItem( $this, $row );
 982         }
 983
 984         public function getCurrent() {
 985                 if ( is_null( $this->currentRevId ) ) {
 986                         $dbw = wfGetDB( DB_MASTER );
 987                         $this->currentRevId = $dbw->selectField(
 988                                 'page', 'page_latest', $this->title->pageCond(), __METHOD__ );
 989                 }
 990                 return $this->currentRevId;
 991         }
 992
 993         public function getSuppressBit() {
 994                 return Revision::DELETED_RESTRICTED;
 995         }
 996
 997         public function doPreCommitUpdates() {
 998                 $this->title->invalidateCache();
 999                 return Status::newGood();
1000         }
1001
1002         public function doPostCommitUpdates() {
1003                 $this->title->purgeSquid();
1004                 // Extensions that require referencing previous revisions may need this
1005                 wfRunHooks( 'ArticleRevisionVisiblitySet', array( &$this->title ) );
1006                 return Status::newGood();
1007         }
1008 }
1009
1010 /**
1011  * Item class for a revision table row
1012  */
1013 class RevDel_RevisionItem extends RevDel_Item {
1014         var $revision;
1015
1016         public function __construct( $list, $row ) {
1017                 parent::__construct( $list, $row );
1018                 $this->revision = new Revision( $row );
1019         }
1020
1021         public function canView() {
1022                 return $this->revision->userCan( Revision::DELETED_RESTRICTED );
1023         }
1024
1025         public function getBits() {
1026                 return $this->revision->mDeleted;
1027         }
1028
1029         public function setBits( $bits ) {
1030                 $dbw = wfGetDB( DB_MASTER );
1031                 // Update revision table
1032                 $dbw->update( 'revision',
1033                         array( 'rev_deleted' => $bits ),
1034                         array(
1035                                 'rev_id' => $this->revision->getId(),
1036                                 'rev_page' => $this->revision->getPage(),
1037                                 'rev_deleted' => $this->getBits()
1038                         ),
1039                         __METHOD__
1040                 );
1041                 if ( !$dbw->affectedRows() ) {
1042                         // Concurrent fail!
1043                         return false;
1044                 }
1045                 // Update recentchanges table
1046                 $dbw->update( 'recentchanges',
1047                         array(
1048                                 'rc_deleted' => $bits,
1049                                 'rc_patrolled' => 1
1050                         ),
1051                         array(
1052                                 'rc_this_oldid' => $this->revision->getId(), // condition
1053                                 // non-unique timestamp index
1054                                 'rc_timestamp' => $dbw->timestamp( $this->revision->getTimestamp() ),
1055                         ),
1056                         __METHOD__
1057                 );
1058                 return true;
1059         }
1060
1061         public function isDeleted() {
1062                 return $this->revision->isDeleted( Revision::DELETED_TEXT );
1063         }
1064
1065         public function isHideCurrentOp( $newBits ) {
1066                 return ( $newBits & Revision::DELETED_TEXT )
1067                         && $this->list->getCurrent() == $this->getId();
1068         }
1069
1070         /**
1071          * Get the HTML link to the revision text.
1072          * Overridden by RevDel_ArchiveItem.
1073          */
1074         protected function getRevisionLink() {
1075                 global $wgLang;
1076                 $date = $wgLang->timeanddate( $this->revision->getTimestamp() );
1077                 if ( $this->isDeleted() && !$this->canView() ) {
1078                         return $date;
1079                 }
1080                 return $this->special->skin->link(
1081                         $this->list->title,
1082                         $date,
1083                         array(),
1084                         array(
1085                                 'oldid' => $this->revision->getId(),
1086                                 'unhide' => 1
1087                         )
1088                 );
1089         }
1090
1091         /**
1092          * Get the HTML link to the diff.
1093          * Overridden by RevDel_ArchiveItem
1094          */
1095         protected function getDiffLink() {
1096                 if ( $this->isDeleted() && !$this->canView() ) {
1097                         return wfMsgHtml('diff');
1098                 } else {
1099                         return
1100                                 $this->special->skin->link(
1101                                         $this->list->title,
1102                                         wfMsgHtml('diff'),
1103                                         array(),
1104                                         array(
1105                                                 'diff' => $this->revision->getId(),
1106                                                 'oldid' => 'prev',
1107                                                 'unhide' => 1
1108                                         ),
1109                                         array(
1110                                                 'known',
1111                                                 'noclasses'
1112                                         )
1113                                 );
1114                 }
1115         }
1116
1117         public function getHTML() {
1118                 $difflink = $this->getDiffLink();
1119                 $revlink = $this->getRevisionLink();
1120                 $userlink = $this->special->skin->revUserLink( $this->revision );
1121                 $comment = $this->special->skin->revComment( $this->revision );
1122                 if ( $this->isDeleted() ) {
1123                         $revlink = "<span class=\"history-deleted\">$revlink</span>";
1124                 }
1125                 return "<li>($difflink) $revlink $userlink $comment</li>";
1126         }
1127 }
1128
1129 /**
1130  * List for archive table items, i.e. revisions deleted via action=delete
1131  */
1132 class RevDel_ArchiveList extends RevDel_RevisionList {
1133         var $type = 'archive';
1134         var $idField = 'ar_timestamp';
1135         var $dateField = 'ar_timestamp';
1136
1137         public function doQuery( $db ) {
1138                 $timestamps = array();
1139                 foreach ( $this->ids as $id ) {
1140                         $timestamps[] = $db->timestamp( $id );
1141                 }
1142                 return $db->select( 'archive', '*',
1143                                 array(
1144                                         'ar_namespace' => $this->title->getNamespace(),
1145                                         'ar_title'     => $this->title->getDBkey(),
1146                                         'ar_timestamp' => $timestamps
1147                                 ),
1148                                 __METHOD__
1149                         );
1150         }
1151
1152         public function newItem( $row ) {
1153                 return new RevDel_ArchiveItem( $this, $row );
1154         }
1155
1156         public function doPreCommitUpdates() {
1157                 return Status::newGood();
1158         }
1159
1160         public function doPostCommitUpdates() {
1161                 return Status::newGood();
1162         }
1163 }
1164
1165 /**
1166  * Item class for a archive table row
1167  */
1168 class RevDel_ArchiveItem extends RevDel_RevisionItem {
1169         public function __construct( $list, $row ) {
1170                 RevDel_Item::__construct( $list, $row );
1171                 $this->revision = Revision::newFromArchiveRow( $row,
1172                         array( 'page' => $this->list->title->getArticleId() ) );
1173         }
1174
1175         public function getId() {
1176                 # Convert DB timestamp to MW timestamp
1177                 return $this->revision->getTimestamp();
1178         }
1179
1180         public function setBits( $bits ) {
1181                 $dbw = wfGetDB( DB_MASTER );
1182                 $dbw->update( 'archive',
1183                         array( 'ar_deleted' => $bits ),
1184                         array( 'ar_namespace' => $this->list->title->getNamespace(),
1185                                 'ar_title'     => $this->list->title->getDBkey(),
1186                                 // use timestamp for index
1187                                 'ar_timestamp' => $this->row->ar_timestamp,
1188                                 'ar_rev_id'    => $this->row->ar_rev_id,
1189                                 'ar_deleted' => $this->getBits()
1190                         ),
1191                         __METHOD__ );
1192                 return (bool)$dbw->affectedRows();
1193         }
1194
1195         protected function getRevisionLink() {
1196                 global $wgLang;
1197                 $undelete = SpecialPage::getTitleFor( 'Undelete' );
1198                 $date = $wgLang->timeanddate( $this->revision->getTimestamp() );
1199                 if ( $this->isDeleted() && !$this->canView() ) {
1200                         return $date;
1201                 }
1202                 return $this->special->skin->link( $undelete, $date, array(),
1203                         array(
1204                                 'target' => $this->list->title->getPrefixedText(),
1205                                 'timestamp' => $this->revision->getTimestamp()
1206                         ) );
1207         }
1208
1209         protected function getDiffLink() {
1210                 if ( $this->isDeleted() && !$this->canView() ) {
1211                         return wfMsgHtml( 'diff' );
1212                 }
1213                 $undelete = SpecialPage::getTitleFor( 'Undelete' );
1214                 return $this->special->skin->link( $undelete, wfMsgHtml('diff'), array(),
1215                         array(
1216                                 'target' => $this->list->title->getPrefixedText(),
1217                                 'diff' => 'prev',
1218                                 'timestamp' => $this->revision->getTimestamp()
1219                         ) );
1220         }
1221 }
1222
1223 /**
1224  * List for oldimage table items
1225  */
1226 class RevDel_FileList extends RevDel_List {
1227         var $type = 'oldimage';
1228         var $idField = 'oi_archive_name';
1229         var $dateField = 'oi_timestamp';
1230         var $storeBatch, $deleteBatch, $cleanupBatch;
1231
1232         public function doQuery( $db ) {
1233                 $archiveName = array();
1234                 foreach( $this->ids as $timestamp ) {
1235                         $archiveNames[] = $timestamp . '!' . $this->title->getDBkey();
1236                 }
1237                 return $db->select( 'oldimage', '*',
1238                         array(
1239                                 'oi_name'         => $this->title->getDBkey(),
1240                                 'oi_archive_name' => $archiveNames
1241                         ),
1242                         __METHOD__
1243                 );
1244         }
1245
1246         public function newItem( $row ) {
1247                 return new RevDel_FileItem( $this, $row );
1248         }
1249
1250         public function clearFileOps() {
1251                 $this->deleteBatch = array();
1252                 $this->storeBatch = array();
1253                 $this->cleanupBatch = array();
1254         }
1255
1256         public function doPreCommitUpdates() {
1257                 $status = Status::newGood();
1258                 $repo = RepoGroup::singleton()->getLocalRepo();
1259                 if ( $this->storeBatch ) {
1260                         $status->merge( $repo->storeBatch( $this->storeBatch, FileRepo::OVERWRITE_SAME ) );
1261                 }
1262                 if ( !$status->isOK() ) {
1263                         return $status;
1264                 }
1265                 if ( $this->deleteBatch ) {
1266                         $status->merge( $repo->deleteBatch( $this->deleteBatch ) );
1267                 }
1268                 if ( !$status->isOK() ) {
1269                         // Running cleanupDeletedBatch() after a failed storeBatch() with the DB already
1270                         // modified (but destined for rollback) causes data loss
1271                         return $status;
1272                 }
1273                 if ( $this->cleanupBatch ) {
1274                         $status->merge( $repo->cleanupDeletedBatch( $this->cleanupBatch ) );
1275                 }
1276                 return $status;
1277         }
1278
1279         public function doPostCommitUpdates() {
1280                 $file = wfLocalFile( $this->title );
1281                 $file->purgeCache();
1282                 $file->purgeDescription();
1283                 return Status::newGood();
1284         }
1285
1286         public function getSuppressBit() {
1287                 return File::DELETED_RESTRICTED;
1288         }
1289 }
1290
1291 /**
1292  * Item class for an oldimage table row
1293  */
1294 class RevDel_FileItem extends RevDel_Item {
1295         var $file;
1296
1297         public function __construct( $list, $row ) {
1298                 parent::__construct( $list, $row );
1299                 $this->file = RepoGroup::singleton()->getLocalRepo()->newFileFromRow( $row );
1300         }
1301
1302         public function getId() {
1303                 $parts = explode( '!', $this->row->oi_archive_name );
1304                 return $parts[0];
1305         }
1306
1307         public function canView() {
1308                 return $this->file->userCan( File::DELETED_RESTRICTED );
1309         }
1310
1311         public function getBits() {
1312                 /** FIXME: use accessor */
1313                 return $this->file->deleted;
1314         }
1315
1316         public function setBits( $bits ) {
1317                 # Queue the file op
1318                 # FIXME: move to LocalFile.php
1319                 if ( $this->isDeleted() ) {
1320                         if ( $bits & File::DELETED_FILE ) {
1321                                 # Still deleted
1322                         } else {
1323                                 # Newly undeleted
1324                                 $key = $this->file->getStorageKey();
1325                                 $srcRel = $this->file->repo->getDeletedHashPath( $key ) . $key;
1326                                 $this->list->storeBatch[] = array(
1327                                         $this->file->repo->getVirtualUrl( 'deleted' ) . '/' . $srcRel,
1328                                         'public',
1329                                         $this->file->getRel()
1330                                 );
1331                                 $this->list->cleanupBatch[] = $key;
1332                         }
1333                 } elseif ( $bits & File::DELETED_FILE ) {
1334                         # Newly deleted
1335                         $key = $this->file->getStorageKey();
1336                         $dstRel = $this->file->repo->getDeletedHashPath( $key ) . $key;
1337                         $this->list->deleteBatch[] = array( $this->file->getRel(), $dstRel );
1338                 }
1339
1340                 # Do the database operations
1341                 $dbw = wfGetDB( DB_MASTER );
1342                 $dbw->update( 'oldimage',
1343                         array( 'oi_deleted' => $bits ),
1344                         array(
1345                                 'oi_name' => $this->row->oi_name,
1346                                 'oi_timestamp' => $this->row->oi_timestamp,
1347                                 'oi_deleted' => $this->getBits()
1348                         ),
1349                         __METHOD__
1350                 );
1351                 return (bool)$dbw->affectedRows();
1352         }
1353
1354         public function isDeleted() {
1355                 return $this->file->isDeleted( File::DELETED_FILE );
1356         }
1357
1358         /**
1359          * Get the link to the file.
1360          * Overridden by RevDel_ArchivedFileItem.
1361          */
1362         protected function getLink() {
1363                 global $wgLang;
1364                 $date = $wgLang->timeanddate( $this->file->getTimestamp(), true  );
1365                 if ( $this->isDeleted() ) {
1366                         # Hidden files...
1367                         if ( !$this->canView() ) {
1368                                 return $date;
1369                         } else {
1370                                 return $this->special->skin->link(
1371                                         $this->special->getTitle(),
1372                                         $date, array(),
1373                                         array(
1374                                                 'target' => $this->list->title->getPrefixedText(),
1375                                                 'file' => $this->file->sha1 . '.' . $this->file->getExtension()
1376                                         )
1377                                 );
1378                         }
1379                 } else {
1380                         # Regular files...
1381                         $url = $this->file->getUrl();
1382                         return Xml::element( 'a', array( 'href' => $this->file->getUrl() ), $date );
1383                 }
1384         }
1385         /**
1386          * Generate a user tool link cluster if the current user is allowed to view it
1387          * @return string HTML
1388          */
1389         protected function getUserTools() {
1390                 if( $this->file->userCan( Revision::DELETED_USER ) ) {
1391                         $link = $this->special->skin->userLink( $this->file->user, $this->file->user_text ) .
1392                                 $this->special->skin->userToolLinks( $this->file->user, $this->file->user_text );
1393                 } else {
1394                         $link = wfMsgHtml( 'rev-deleted-user' );
1395                 }
1396                 if( $this->file->isDeleted( Revision::DELETED_USER ) ) {
1397                         return '<span class="history-deleted">' . $link . '</span>';
1398                 }
1399                 return $link;
1400         }
1401
1402         /**
1403          * Wrap and format the file's comment block, if the current
1404          * user is allowed to view it.
1405          *
1406          * @return string HTML
1407          */
1408         protected function getComment() {
1409                 if( $this->file->userCan( File::DELETED_COMMENT ) ) {
1410                         $block = $this->special->skin->commentBlock( $this->file->description );
1411                 } else {
1412                         $block = ' ' . wfMsgHtml( 'rev-deleted-comment' );
1413                 }
1414                 if( $this->file->isDeleted( File::DELETED_COMMENT ) ) {
1415                         return "<span class=\"history-deleted\">$block</span>";
1416                 }
1417                 return $block;
1418         }
1419
1420         public function getHTML() {
1421                 global $wgLang;
1422                 $data =
1423                         wfMsg(
1424                                 'widthheight',
1425                                 $wgLang->formatNum( $this->file->getWidth() ),
1426                                 $wgLang->formatNum( $this->file->getHeight() )
1427                         ) .
1428                         ' (' .
1429                         wfMsgExt( 'nbytes', 'parsemag', $wgLang->formatNum( $this->file->getSize() ) ) .
1430                         ')';
1431                 $pageLink = $this->getLink();
1432
1433                 return '<li>' . $this->getLink() . ' ' . $this->getUserTools() . ' ' .
1434                         $data . ' ' . $this->getComment(). '</li>';
1435         }
1436 }
1437
1438 /**
1439  * List for filearchive table items
1440  */
1441 class RevDel_ArchivedFileList extends RevDel_FileList {
1442         var $type = 'filearchive';
1443         var $idField = 'fa_id';
1444         var $dateField = 'fa_timestamp';
1445
1446         public function doQuery( $db ) {
1447                 $ids = array_map( 'intval', $this->ids );
1448                 return $db->select( 'filearchive', '*',
1449                         array(
1450                                 'fa_name' => $this->title->getDBkey(),
1451                                 'fa_id'   => $ids
1452                         ),
1453                         __METHOD__
1454                 );
1455         }
1456
1457         public function newItem( $row ) {
1458                 return new RevDel_ArchivedFileItem( $this, $row );
1459         }
1460 }
1461
1462 /**
1463  * Item class for a filearchive table row
1464  */
1465 class RevDel_ArchivedFileItem extends RevDel_FileItem {
1466         public function __construct( $list, $row ) {
1467                 RevDel_Item::__construct( $list, $row );
1468                 $this->file = ArchivedFile::newFromRow( $row );
1469         }
1470
1471         public function getId() {
1472                 return $this->row->fa_id;
1473         }
1474
1475         public function setBits( $bits ) {
1476                 $dbw = wfGetDB( DB_MASTER );
1477                 $dbw->update( 'filearchive',
1478                         array( 'fa_deleted' => $bits ),
1479                         array(
1480                                 'fa_id' => $this->row->fa_id,
1481                                 'fa_deleted' => $this->getBits(),
1482                         ),
1483                         __METHOD__
1484                 );
1485                 return (bool)$dbw->affectedRows();
1486         }
1487
1488         protected function getLink() {
1489                 global $wgLang, $wgUser;
1490                 $date = $wgLang->timeanddate( $this->file->getTimestamp(), true  );
1491                 $undelete = SpecialPage::getTitleFor( 'Undelete' );
1492                 $key = $this->file->getKey();
1493                 return $this->special->skin->link( $undelete, $date, array(),
1494                         array(
1495                                 'target' => $this->list->title->getPrefixedText(),
1496                                 'file' => $key,
1497                                 'token' => $wgUser->editToken( $key )
1498                         ) );
1499         }
1500 }
1501
1502 /**
1503  * List for logging table items
1504  */
1505 class RevDel_LogList extends RevDel_List {
1506         var $type = 'logging';
1507         var $idField = 'log_id';
1508         var $dateField = 'log_timestamp';
1509
1510         public function doQuery( $db ) {
1511                 global $wgMessageCache;
1512                 $wgMessageCache->loadAllMessages();
1513                 $ids = array_map( 'intval', $this->ids );
1514                 return $db->select( 'logging', '*',
1515                         array( 'log_id' => $ids ),
1516                         __METHOD__
1517                 );
1518         }
1519
1520         public function newItem( $row ) {
1521                 return new RevDel_LogItem( $this, $row );
1522         }
1523
1524         public function getSuppressBit() {
1525                 return Revision::DELETED_RESTRICTED;
1526         }
1527
1528         public function getLogAction() {
1529                 return 'event';
1530         }
1531
1532         public function getLogParams( $params ) {
1533                 return array(
1534                         implode( ',', $params['ids'] ),
1535                         "ofield={$params['oldBits']}",
1536                         "nfield={$params['newBits']}"
1537                 );
1538         }
1539 }
1540
1541 /**
1542  * Item class for a logging table row
1543  */
1544 class RevDel_LogItem extends RevDel_Item {
1545         public function canView() {
1546                 return LogEventsList::userCan( $this->row, Revision::DELETED_RESTRICTED );
1547         }
1548
1549         public function getBits() {
1550                 return $this->row->log_deleted;
1551         }
1552
1553         public function setBits( $bits ) {
1554                 $dbw = wfGetDB( DB_MASTER );
1555                 $dbw->update( 'recentchanges',
1556                         array(
1557                                 'rc_deleted' => $bits,
1558                                 'rc_patrolled' => 1
1559                         ),
1560                         array(
1561                                 'rc_logid' => $this->row->log_id,
1562                                 'rc_timestamp' => $this->row->log_timestamp
1563                         ),
1564                         __METHOD__
1565                 );
1566                 $dbw->update( 'logging',
1567                         array( 'log_deleted' => $bits ),
1568                         array(
1569                                 'log_id' => $this->row->log_id,
1570                                 'log_deleted' => $this->getBits()
1571                         ),
1572                         __METHOD__
1573                 );
1574                 return (bool)$dbw->affectedRows();
1575         }
1576
1577         public function getHTML() {
1578                 global $wgLang;
1579
1580                 $date = htmlspecialchars( $wgLang->timeanddate( $this->row->log_timestamp ) );
1581                 $paramArray = LogPage::extractParams( $this->row->log_params );
1582                 $title = Title::makeTitle( $this->row->log_namespace, $this->row->log_title );
1583
1584                 $logtitle = SpecialPage::getTitleFor( 'Log' );
1585                 $loglink = $this->special->skin->link( $logtitle, wfMsgHtml( 'log' ), array(),
1586                         array( 'page' => $title->getPrefixedUrl() ) );
1587                 // Action text
1588                 if( !$this->canView() ) {
1589                         $action = '<span class="history-deleted">' . wfMsgHtml('rev-deleted-event') . '</span>';
1590                 } else {
1591                         $action = LogPage::actionText( $this->row->log_type, $this->row->log_action, $title,
1592                                 $this->special->skin, $paramArray, true, true );
1593                         if( $this->row->log_deleted & LogPage::DELETED_ACTION )
1594                                 $action = '<span class="history-deleted">' . $action . '</span>';
1595                 }
1596                 // User links
1597                 $userLink = $this->special->skin->userLink(
1598                         $this->row->log_user, User::WhoIs( $this->row->log_user ) );
1599                 if( LogEventsList::isDeleted($this->row,LogPage::DELETED_USER) ) {
1600                         $userLink = '<span class="history-deleted">' . $userLink . '</span>';
1601                 }
1602                 // Comment
1603                 $comment = $wgLang->getDirMark() . $this->special->skin->commentBlock( $this->row->log_comment );
1604                 if( LogEventsList::isDeleted($this->row,LogPage::DELETED_COMMENT) ) {
1605                         $comment = '<span class="history-deleted">' . $comment . '</span>';
1606                 }
1607                 return "<li>($loglink) $date $userLink $action $comment</li>";
1608         }
1609 }