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kmfoldercachedimap.cpp

/**
 *  kmfoldercachedimap.cpp
 *
 *  Copyright (c) 2002-2004 Bo Thorsen <bo@sonofthor.dk>
 *  Copyright (c) 2002-2003 Steffen Hansen <steffen@klaralvdalens-datakonsult.se>
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; version 2 of the License
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program; if not, write to the Free Software
 *  Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 *
 *  In addition, as a special exception, the copyright holders give
 *  permission to link the code of this program with any edition of
 *  the Qt library by Trolltech AS, Norway (or with modified versions
 *  of Qt that use the same license as Qt), and distribute linked
 *  combinations including the two.  You must obey the GNU General
 *  Public License in all respects for all of the code used other than
 *  Qt.  If you modify this file, you may extend this exception to
 *  your version of the file, but you are not obligated to do so.  If
 *  you do not wish to do so, delete this exception statement from
 *  your version.
 */

#ifdef HAVE_CONFIG_H
#include <config.h>
#endif

#include <errno.h>

#include "kmkernel.h"
#include "kmfoldercachedimap.h"
#include "undostack.h"
#include "kmfoldermgr.h"
#include "kmmessage.h"
#include "kmacctcachedimap.h"
#include "kmacctmgr.h"
#include "kmailicalifaceimpl.h"
#include "kmfolder.h"
#include "kmdict.h"
#include "acljobs.h"
#include "broadcaststatus.h"
using KPIM::BroadcastStatus;
#include "progressmanager.h"

using KMail::CachedImapJob;
using KMail::ImapAccountBase;
#include "listjob.h"
using KMail::ListJob;

#include <kapplication.h>
#include <kmessagebox.h>
#include <klocale.h>
#include <kdebug.h>
#include <kconfig.h>
#include <kio/global.h>
#include <kio/scheduler.h>
#include <qbuffer.h>
#include <qfile.h>
#include <qlabel.h>
#include <qlayout.h>
#include <qvaluelist.h>

#define UIDCACHE_VERSION 1


DImapTroubleShootDialog::DImapTroubleShootDialog( QWidget* parent,
                                                  const char* name )
  : KDialogBase( Plain, i18n( "Troubleshooting IMAP Cache" ),
                 Cancel | User1 | User2, Cancel, parent, name, true ),
    rc( Cancel )
{
  QFrame* page = plainPage();
  QVBoxLayout *topLayout = new QVBoxLayout( page, 0 );
  QString txt = i18n( "<p><b>Troubleshooting the IMAP cache.</b></p>"
                      "<p>If you have problems with synchronizing an IMAP "
                      "folder, you should first try rebuilding the index "
                      "file. This will take some time to rebuild, but will "
                      "not cause any problems.</p><p>If that is not enough, "
                      "you can try refreshing the IMAP cache. If you do this, "
                      "you will loose all your local changes for this folder "
                      "and all it's subfolders.</p>" );
  topLayout->addWidget( new QLabel( txt, page ) );
  enableButtonSeparator( true );

  setButtonText( User1, i18n( "Refresh &Cache" ) );
  setButtonText( User2, i18n( "Rebuild &Index" ) );

  connect( this, SIGNAL( user1Clicked () ), this, SLOT( slotRebuildCache() ) );
  connect( this, SIGNAL( user2Clicked () ), this, SLOT( slotRebuildIndex() ) );
}

int DImapTroubleShootDialog::run()
{
  DImapTroubleShootDialog d;
  d.exec();
  return d.rc;
}

void DImapTroubleShootDialog::slotRebuildCache()
{
  rc = User1;
  done( User1 );
}

void DImapTroubleShootDialog::slotRebuildIndex()
{
  rc = User2;
  done( User2 );
}


KMFolderCachedImap::KMFolderCachedImap( KMFolder* folder, const char* aName )
  : KMFolderMaildir( folder, aName ),
    mSyncState( SYNC_STATE_INITIAL ), mContentState( imapNoInformation ),
    mSubfolderState( imapNoInformation ), mIsSelected( false ),
    mCheckFlags( true ), mAccount( NULL ), uidMapDirty( true ),
    uidWriteTimer( -1 ), mLastUid( 0 ), mTentativeHighestUid( 0 ),
    mUserRights( 0 ), mFolderRemoved( false ),
    /*mHoldSyncs( false ),*/ mRecurse( true ),
    mContentsTypeChanged( false ), mStatusChangedLocally( false )
{
  setUidValidity("");
  readUidCache();

  mProgress = 0;
}

KMFolderCachedImap::~KMFolderCachedImap()
{
  if( !mFolderRemoved ) {
    // Only write configuration when the folder haven't been deleted
    KConfig* config = KMKernel::config();
    KConfigGroupSaver saver( config, "Folder-" + folder()->idString() );
    config->writeEntry( "ImapPath", mImapPath );
    config->writeEntry( "NoContent", mNoContent );
    config->writeEntry( "ReadOnly", mReadOnly );
    config->writeEntry( "StatusChangedLocally", mStatusChangedLocally );

    writeUidCache();
  }

  if (kmkernel->undoStack()) kmkernel->undoStack()->folderDestroyed( folder() );
}

void KMFolderCachedImap::initializeFrom( KMFolderCachedImap* parent )
{
  setAccount( parent->account() );
  // Now that we have an account, tell it that this folder was created:
  // if this folder was just removed, then we don't really want to remove it from the server.
  mAccount->removeDeletedFolder( imapPath() );
  setUserRights( parent->userRights() );
}

void KMFolderCachedImap::readConfig()
{
  KConfig* config = KMKernel::config();
  KConfigGroupSaver saver( config, "Folder-" + folder()->idString() );
  if( mImapPath.isEmpty() ) mImapPath = config->readEntry( "ImapPath" );
  if( QString( name() ).upper() == "INBOX" && mImapPath == "/INBOX/" )
  {
    folder()->setLabel( i18n( "inbox" ) );
    // for the icon
    folder()->setSystemFolder( true );
  }
  mNoContent = config->readBoolEntry( "NoContent", false );
  mReadOnly = config->readBoolEntry( "ReadOnly", false );

  KMFolderMaildir::readConfig();
  mContentsTypeChanged = false;
  mStatusChangedLocally =
    config->readBoolEntry( "StatusChangedLocally", false );
}

void KMFolderCachedImap::remove()
{
  mFolderRemoved = true;

  QString part1 = folder()->path() + "/." + dotEscape(name());
  QString uidCacheFile = part1 + ".uidcache";
  // This is the account folder of an account that was just removed
  // When this happens, be sure to delete all traces of the cache
  if( QFile::exists(uidCacheFile) )
    unlink( QFile::encodeName( uidCacheFile ) );
  KIO::del( KURL::fromPathOrURL( part1 + ".directory" ) );

  FolderStorage::remove();
}

QString KMFolderCachedImap::uidCacheLocation() const
{
  QString sLocation(folder()->path());
  if (!sLocation.isEmpty()) sLocation += '/';
  return sLocation + '.' + dotEscape(fileName()) + ".uidcache";
}

int KMFolderCachedImap::readUidCache()
{
  QFile uidcache( uidCacheLocation() );
  if( uidcache.open( IO_ReadOnly ) ) {
    char buf[1024];
    int len = uidcache.readLine( buf, sizeof(buf) );
    if( len > 0 ) {
      int cacheVersion;
      sscanf( buf, "# KMail-UidCache V%d\n",  &cacheVersion );
      if( cacheVersion == UIDCACHE_VERSION ) {
        len = uidcache.readLine( buf, sizeof(buf) );
        if( len > 0 ) {
          setUidValidity( QString::fromLocal8Bit( buf).stripWhiteSpace() );
          len = uidcache.readLine( buf, sizeof(buf) );
          if( len > 0 ) {
            // load the last known highest uid from the on disk cache
            setLastUid( QString::fromLocal8Bit( buf).stripWhiteSpace().toULong() );
            return 0;
          }
        }
      }
    }
  }
  return -1;
}

int KMFolderCachedImap::writeUidCache()
{
  if( uidValidity().isEmpty() || uidValidity() == "INVALID" ) {
    // No info from the server yet, remove the file.
    if( QFile::exists( uidCacheLocation() ) )
      unlink( QFile::encodeName( uidCacheLocation() ) );
    return 0;
  }

  QFile uidcache( uidCacheLocation() );
  if( uidcache.open( IO_WriteOnly ) ) {
    QTextStream str( &uidcache );
    str << "# KMail-UidCache V" << UIDCACHE_VERSION << endl;
    str << uidValidity() << endl;
    str << lastUid() << endl;
    uidcache.flush();
    fsync( uidcache.handle() ); /* this is probably overkill */
    uidcache.close();
    return 0;
  } else {
    return errno; /* does QFile set errno? */
  }
}

void KMFolderCachedImap::reloadUidMap()
{
  uidMap.clear();
  open();
  for( int i = 0; i < count(); ++i ) {
    KMMsgBase *msg = getMsgBase( i );
    if( !msg ) continue;
    ulong uid = msg->UID();
    uidMap.insert( uid, i );
  }
  close();
  uidMapDirty = false;
}

/* Reimplemented from KMFolderMaildir */
KMMessage* KMFolderCachedImap::take(int idx)
{
  uidMapDirty = true;
  return KMFolderMaildir::take(idx);
}

// Add a message without clearing it's X-UID field.
int KMFolderCachedImap::addMsgInternal( KMMessage* msg, bool newMail,
                                        int* index_return )
{
  // Possible optimization: Only dirty if not filtered below
  ulong uid = msg->UID();
  if( uid != 0 ) {
    uidMapDirty = true;
  }

  // Add the message
  int rc = KMFolderMaildir::addMsg(msg, index_return);

  if( newMail && imapPath() == "/INBOX/" )
    // This is a new message. Filter it
    mAccount->processNewMsg( msg );

  return rc;
}

/* Reimplemented from KMFolderMaildir */
int KMFolderCachedImap::addMsg(KMMessage* msg, int* index_return)
{
  // Strip the IMAP UID
  msg->removeHeaderField( "X-UID" );
  msg->setUID( 0 );

  // Add it to storage
  return addMsgInternal( msg, false, index_return );
}


/* Reimplemented from KMFolderMaildir */
void KMFolderCachedImap::removeMsg(int idx, bool imapQuiet)
{
  uidMapDirty = true;
  // Remove it from disk
  KMFolderMaildir::removeMsg(idx,imapQuiet);
}

bool KMFolderCachedImap::canRemoveFolder() const {
  // If this has subfolders it can't be removed
  if( folder() && folder()->child() && folder()->child()->count() > 0 )
    return false;

#if 0
  // No special condition here, so let base class decide
  return KMFolderMaildir::canRemoveFolder();
#endif
  return true;
}

/* Reimplemented from KMFolderDir */
int KMFolderCachedImap::rename( const QString& aName,
                                KMFolderDir* /*aParent*/ )
{
  if ( aName == name() )
    // Stupid user trying to rename it to it's old name :)
    return 0;

  if( account() == 0 || imapPath().isEmpty() ) { // I don't think any of this can happen anymore
    QString err = i18n("You must synchronize with the server before renaming IMAP folders.");
    KMessageBox::error( 0, err );
    return -1;
  }

  // Make the change appear to the user with setLabel, but we'll do the change
  // on the server during the next sync.
  mAccount->addRenamedFolder( imapPath(), folder()->label(), aName );
  folder()->setLabel( aName );

  return 0;
}

KMFolder* KMFolderCachedImap::trashFolder() const
{
  QString trashStr = account()->trash();
  return kmkernel->dimapFolderMgr()->findIdString( trashStr );
}

void KMFolderCachedImap::setLastUid( ulong uid )
{
  mLastUid = uid;
  if( uidWriteTimer == -1 )
    // Write in one minute
    uidWriteTimer = startTimer( 60000 );
}

void KMFolderCachedImap::timerEvent( QTimerEvent* )
{
  killTimer( uidWriteTimer );
  uidWriteTimer = -1;
  writeUidCache();
}

ulong KMFolderCachedImap::lastUid()
{
  return mLastUid;
}

KMMsgBase* KMFolderCachedImap::findByUID( ulong uid )
{
  bool mapReloaded = false;
  if( uidMapDirty ) {
    reloadUidMap();
    mapReloaded = true;
  }

  QMap<ulong,int>::Iterator it = uidMap.find( uid );
  if( it != uidMap.end() ) {
    KMMsgBase *msg = getMsgBase( *it );
    if( msg && msg->UID() == uid )
      return msg;
  }
  // Not found by now
  if( mapReloaded )
    // Not here then
    return 0;
  // There could be a problem in the maps. Rebuild them and try again
  reloadUidMap();
  it = uidMap.find( uid );
  if( it != uidMap.end() )
    // Since the uid map is just rebuilt, no need for the sanity check
    return getMsg( *it );
  // Then it's not here
  return 0;
}

// This finds and sets the proper account for this folder if it has
// not been done
KMAcctCachedImap *KMFolderCachedImap::account() const
{
  if( (KMAcctCachedImap *)mAccount == 0 ) {
    // Find the account
    mAccount = static_cast<KMAcctCachedImap *>( kmkernel->acctMgr()->findByName( name() ) );
  }

  return mAccount;
}

void KMFolderCachedImap::slotTroubleshoot()
{
  const int rc = DImapTroubleShootDialog::run();

  if( rc == KDialogBase::User1 ) {
    // Refresh cache
    if( !account() ) {
      KMessageBox::sorry( 0, i18n("No account setup for this folder.\n"
                                  "Please try running a sync before this.") );
      return;
    }
    QString str = i18n("Are you sure you want to refresh the IMAP cache of "
                       "the folder %1 and all it's subfolders?\nThis will "
                       "remove all changes you have done locally to your "
                       "folders").arg( label() );
    QString s1 = i18n("Refresh IMAP Cache");
    QString s2 = i18n("&Refresh");
    if( KMessageBox::warningContinueCancel( 0, str, s1, s2 ) ==
        KMessageBox::Continue )
      account()->invalidateIMAPFolders( this );
  } else if( rc == KDialogBase::User2 ) {
    // Rebuild index file
    createIndexFromContents();
    KMessageBox::information( 0, i18n( "The index of this folder has been "
                                       "recreated." ) );
  }
}

void KMFolderCachedImap::serverSync( bool recurse )
{
  if( mSyncState != SYNC_STATE_INITIAL ) {
    if( KMessageBox::warningYesNo( 0, i18n("Folder %1 is not in initial sync state (state was %2). Do you want to reset it to initial sync state and sync anyway?" ).arg( imapPath() ).arg( mSyncState ) ) == KMessageBox::Yes ) {
      mSyncState = SYNC_STATE_INITIAL;
    } else return;
  }

  mRecurse = recurse;
  assert( account() );

  mAccount->mailCheckProgressItem()->reset();
  mAccount->mailCheckProgressItem()->setTotalItems( 100 );
  mProgress = 0;

#if 0
  if( mHoldSyncs ) {
    // All done for this folder.
    account()->mailCheckProgressItem()->setProgress( 100 );
    mProgress = 100; // all done
    newState( mProgress, i18n("Synchronization skipped"));
    mSyncState = SYNC_STATE_INITIAL;
    emit folderComplete( this, true );
    return;
  }
#endif
  mTentativeHighestUid = 0; // reset, last sync could have been canceled

  serverSyncInternal();
}

QString KMFolderCachedImap::state2String( int state ) const
{
  switch( state ) {
  case SYNC_STATE_INITIAL:           return "SYNC_STATE_INITIAL";
  case SYNC_STATE_PUT_MESSAGES:      return "SYNC_STATE_PUT_MESSAGES";
  case SYNC_STATE_UPLOAD_FLAGS:      return "SYNC_STATE_UPLOAD_FLAGS";
  case SYNC_STATE_CREATE_SUBFOLDERS: return "SYNC_STATE_CREATE_SUBFOLDERS";
  case SYNC_STATE_LIST_SUBFOLDERS:   return "SYNC_STATE_LIST_SUBFOLDERS";
  case SYNC_STATE_LIST_SUBFOLDERS2:  return "SYNC_STATE_LIST_SUBFOLDERS2";
  case SYNC_STATE_DELETE_SUBFOLDERS: return "SYNC_STATE_DELETE_SUBFOLDERS";
  case SYNC_STATE_LIST_MESSAGES:     return "SYNC_STATE_LIST_MESSAGES";
  case SYNC_STATE_DELETE_MESSAGES:   return "SYNC_STATE_DELETE_MESSAGES";
  case SYNC_STATE_GET_MESSAGES:      return "SYNC_STATE_GET_MESSAGES";
  case SYNC_STATE_EXPUNGE_MESSAGES:  return "SYNC_STATE_EXPUNGE_MESSAGES";
  case SYNC_STATE_HANDLE_INBOX:      return "SYNC_STATE_HANDLE_INBOX";
  case SYNC_STATE_GET_USERRIGHTS:    return "SYNC_STATE_GET_USERRIGHTS";
  case SYNC_STATE_GET_ACLS:          return "SYNC_STATE_GET_ACLS";
  case SYNC_STATE_SET_ACLS:          return "SYNC_STATE_SET_ACLS";
  case SYNC_STATE_FIND_SUBFOLDERS:   return "SYNC_STATE_FIND_SUBFOLDERS";
  case SYNC_STATE_SYNC_SUBFOLDERS:   return "SYNC_STATE_SYNC_SUBFOLDERS";
  case SYNC_STATE_CHECK_UIDVALIDITY: return "SYNC_STATE_CHECK_UIDVALIDITY";
  case SYNC_STATE_RENAME_FOLDER:     return "SYNC_STATE_RENAME_FOLDER";
  default:                           return "Unknown state";
  }
}

/*
  Progress calculation: each step is assigned a span. Initially the total is 100.
  But if we skip a step, don't increase the progress.
  This leaves more room for the step a with variable size (get_messages)
   connecting 5
   getuserrights 5
   rename 5
   check_uidvalidity 5
   create_subfolders 5
   put_messages 10 (but it can take a very long time, with many messages....)
   upload_flags 5
   list_subfolders 5
   list_subfolders2 0 (all local)
   delete_subfolders 5
   list_messages 10
   delete_messages 10
   expunge_messages 5
   get_messages variable (remaining-5) i.e. minimum 15.
   set_acls 0 (rare)
   get_acls 5

  noContent folders have only a few of the above steps
  (permissions, and all subfolder stuff), so its steps should be given more span

 */

// While the server synchronization is running, mSyncState will hold
// the state that should be executed next
void KMFolderCachedImap::serverSyncInternal()
{
  // This is used to stop processing when we're about to exit
  // and the current job wasn't cancellable.
  // For user-requested abort, we'll use signalAbortRequested instead.
  if( kmkernel->mailCheckAborted() ) {
    resetSyncState();
    emit folderComplete( this, false );
    return;
  }

  //kdDebug(5006) << label() << ": " << state2String( mSyncState ) << endl;
  switch( mSyncState ) {
  case SYNC_STATE_INITIAL:
  {
    mProgress = 0;
    newState( mProgress, i18n("Synchronizing"));

    open();
    if ( !noContent() )
        mAccount->addLastUnreadMsgCount( this, countUnread() );

    // Connect to the server (i.e. prepare the slave)
    ImapAccountBase::ConnectionState cs = mAccount->makeConnection();
    if ( cs == ImapAccountBase::Error ) {
      // Cancelled by user, or slave can't start
      // kdDebug(5006) << "makeConnection said Error, aborting." << endl;
      // We stop here. We're already in SYNC_STATE_INITIAL for the next time.
      newState( mProgress, i18n( "Error connecting to server %1" ).arg( mAccount->host() ) );
      close();
      emit folderComplete(this, FALSE);
      break;
    } else if ( cs == ImapAccountBase::Connecting ) {
      // kdDebug(5006) << "makeConnection said Connecting, waiting for signal." << endl;
      newState( mProgress, i18n("Connecting to %1").arg( mAccount->host() ) );
      // We'll wait for the connectionResult signal from the account.
      connect( mAccount, SIGNAL( connectionResult(int, const QString&) ),
               this, SLOT( slotConnectionResult(int, const QString&) ) );
      break;
    } else {
      // Connected
      // kdDebug(5006) << "makeConnection said Connected, proceeding." << endl;
      mSyncState = SYNC_STATE_GET_USERRIGHTS;
      // Fall through to next state
    }
  }

  case SYNC_STATE_GET_USERRIGHTS:
    mSyncState = SYNC_STATE_RENAME_FOLDER;

    if( !noContent() && mAccount->hasACLSupport() ) {
      // Check the user's own rights. We do this every time in case they changed.
      newState( mProgress, i18n("Checking permissions"));
      connect( mAccount, SIGNAL( receivedUserRights( KMFolder* ) ),
               this, SLOT( slotReceivedUserRights( KMFolder* ) ) );
      mAccount->getUserRights( folder(), imapPath() ); // after connecting, due to the INBOX case
      break;
    }

  case SYNC_STATE_RENAME_FOLDER:
  {
    mSyncState = SYNC_STATE_CHECK_UIDVALIDITY;
    // Returns the new name if the folder was renamed, empty otherwise.
    QString newName = mAccount->renamedFolder( imapPath() );
    if ( !newName.isEmpty() ) {
      newState( mProgress, i18n("Renaming folder") );
      CachedImapJob *job = new CachedImapJob( newName, CachedImapJob::tRenameFolder, this );
      connect( job, SIGNAL( result(KMail::FolderJob *) ), this, SLOT( slotIncreaseProgress() ) );
      connect( job, SIGNAL( finished() ), this, SLOT( serverSyncInternal() ) );
      job->start();
      break;
    }
  }

  case SYNC_STATE_CHECK_UIDVALIDITY:
    mSyncState = SYNC_STATE_CREATE_SUBFOLDERS;
    if( !noContent() ) {
      checkUidValidity();
      break;
    }
    // Else carry on

  case SYNC_STATE_CREATE_SUBFOLDERS:
    mSyncState = SYNC_STATE_PUT_MESSAGES;
    createNewFolders();
    break;

  case SYNC_STATE_PUT_MESSAGES:
    mSyncState = SYNC_STATE_UPLOAD_FLAGS;
    if( !noContent() ) {
      uploadNewMessages();
      break;
    }
    // Else carry on
  case SYNC_STATE_UPLOAD_FLAGS:
    mSyncState = SYNC_STATE_LIST_SUBFOLDERS;
    if( !noContent() ) {
       // We haven't downloaded messages yet, so we need to build the map.
       if( uidMapDirty )
         reloadUidMap();
       // Upload flags, unless we know from the ACL that we're not allowed
       // to do that or they did not change locally
       if ( mUserRights <= 0 || ( mUserRights & KMail::ACLJobs::WriteFlags ) ) {
         if ( mStatusChangedLocally ) {
           uploadFlags();
           break;
         } else {
           kdDebug(5006) << "Skipping flags upload, folder unchanged: " << label() << endl;
         }
       }
    }
    // Else carry on
  case SYNC_STATE_LIST_SUBFOLDERS:
    mSyncState = SYNC_STATE_LIST_SUBFOLDERS2;
    newState( mProgress, i18n("Retrieving folderlist"));
    if( !listDirectory() ) {
      mSyncState = SYNC_STATE_INITIAL;
      KMessageBox::error(0, i18n("Error while retrieving the folderlist"));
    }
    break;

  case SYNC_STATE_LIST_SUBFOLDERS2:
    mSyncState = SYNC_STATE_DELETE_SUBFOLDERS;
    mProgress += 10;
    newState( mProgress, i18n("Retrieving subfolders"));
    listDirectory2();
    break;

  case SYNC_STATE_DELETE_SUBFOLDERS:
    mSyncState = SYNC_STATE_LIST_MESSAGES;
    if( !foldersForDeletionOnServer.isEmpty() ) {
      newState( mProgress, i18n("Deleting folders from server"));
      CachedImapJob* job = new CachedImapJob( foldersForDeletionOnServer,
                                                  CachedImapJob::tDeleteFolders, this );
      connect( job, SIGNAL( result(KMail::FolderJob *) ), this, SLOT( slotIncreaseProgress() ) );
      connect( job, SIGNAL( finished() ), this, SLOT( serverSyncInternal() ) );
      job->start();
      break;
    }
    // Not needed, the next step emits newState very quick
    //newState( mProgress, i18n("No folders to delete from server"));
      // Carry on

  case SYNC_STATE_LIST_MESSAGES:
    mSyncState = SYNC_STATE_DELETE_MESSAGES;
    if( !noContent() ) {
      newState( mProgress, i18n("Retrieving message list"));
      listMessages();
      break;
    }
    // Else carry on

  case SYNC_STATE_DELETE_MESSAGES:
    mSyncState = SYNC_STATE_EXPUNGE_MESSAGES;
    if( !noContent() ) {
      if( deleteMessages() ) {
        // Fine, we will continue with the next state
      } else {
        // No messages to delete, skip to GET_MESSAGES
        newState( mProgress, i18n("No messages to delete..."));
        mSyncState = SYNC_STATE_GET_MESSAGES;
        serverSyncInternal();
      }
      break;
    }
    // Else carry on

  case SYNC_STATE_EXPUNGE_MESSAGES:
    mSyncState = SYNC_STATE_GET_MESSAGES;
    if( !noContent() ) {
      newState( mProgress, i18n("Expunging deleted messages"));
      CachedImapJob *job = new CachedImapJob( QString::null,
                                              CachedImapJob::tExpungeFolder, this );
      connect( job, SIGNAL( result(KMail::FolderJob *) ), this, SLOT( slotIncreaseProgress() ) );
      connect( job, SIGNAL( finished() ), this, SLOT( serverSyncInternal() ) );
      job->start();
      break;
    }
    // Else carry on

  case SYNC_STATE_GET_MESSAGES:
    mSyncState = SYNC_STATE_HANDLE_INBOX;
    if( !noContent() ) {
      if( !mMsgsForDownload.isEmpty() ) {
        newState( mProgress, i18n("Retrieving new messages"));
        CachedImapJob *job = new CachedImapJob( mMsgsForDownload,
                                                CachedImapJob::tGetMessage,
                                                this );
        connect( job, SIGNAL( progress(unsigned long, unsigned long) ),
                 this, SLOT( slotProgress(unsigned long, unsigned long) ) );
        connect( job, SIGNAL( finished() ), this, SLOT( slotUpdateLastUid() ) );
        connect( job, SIGNAL( finished() ), this, SLOT( serverSyncInternal() ) );
        job->start();
        mMsgsForDownload.clear();
        break;
      } else {
        newState( mProgress, i18n("No new messages from server"));
        /* There were no messages to download, but it could be that we uploaded some
           which we didn't need to download again because we already knew the uid.
           Now that we are sure there is nothing to download, and everything that had
           to be deleted on the server has been deleted, adjust our local notion of the
           highes uid seen thus far. */
        slotUpdateLastUid();
        if( mLastUid == 0 && uidWriteTimer == -1 )
          // This is probably a new and empty folder. Write the UID cache
          writeUidCache();
      }
    }

    // Else carry on

  case SYNC_STATE_HANDLE_INBOX:
    // Wrap up the 'download emails' stage. We always end up at 95 here.
    mProgress = 95;

    // Continue with the ACLs
    mSyncState = SYNC_STATE_SET_ACLS;

  case SYNC_STATE_SET_ACLS:
    mSyncState = SYNC_STATE_GET_ACLS;

    if( !noContent() && mAccount->hasACLSupport() ) {
      bool hasChangedACLs = false;
      ACLList::ConstIterator it = mACLList.begin();
      for ( ; it != mACLList.end() && !hasChangedACLs; ++it ) {
        hasChangedACLs = (*it).changed;
      }
      if ( hasChangedACLs ) {
        newState( mProgress, i18n("Setting permissions"));
        KURL url = mAccount->getUrl();
        url.setPath( imapPath() );
        KIO::Job* job = KMail::ACLJobs::multiSetACL( mAccount->slave(), url, mACLList );
        ImapAccountBase::jobData jd( url.url(), folder() );
        mAccount->insertJob(job, jd);

        connect(job, SIGNAL(result(KIO::Job *)),
                SLOT(slotMultiSetACLResult(KIO::Job *)));
        connect(job, SIGNAL(aclChanged( const QString&, int )),
                SLOT(slotACLChanged( const QString&, int )) );
        break;
      }
    }

  case SYNC_STATE_GET_ACLS:
    // Continue with the subfolders
    mSyncState = SYNC_STATE_FIND_SUBFOLDERS;

    if( !noContent() && mAccount->hasACLSupport() ) {
      newState( mProgress, i18n( "Retrieving permissions" ) );
      mAccount->getACL( folder(), mImapPath );
      connect( mAccount, SIGNAL(receivedACL( KMFolder*, KIO::Job*, const KMail::ACLList& )),
               this, SLOT(slotReceivedACL( KMFolder*, KIO::Job*, const KMail::ACLList& )) );
      break;
    }

  case SYNC_STATE_FIND_SUBFOLDERS:
    {
      mProgress = 98;
      newState( mProgress, i18n("Updating cache file"));

      mSyncState = SYNC_STATE_SYNC_SUBFOLDERS;
      mSubfoldersForSync.clear();
      mCurrentSubfolder = 0;
      if( folder() && folder()->child() ) {
        KMFolderNode *node = folder()->child()->first();
        while( node ) {
          if( !node->isDir() ) {
            KMFolderCachedImap* storage = static_cast<KMFolderCachedImap*>(static_cast<KMFolder*>(node)->storage());
            // Only sync folders that have been accepted by the server
            if ( !storage->imapPath().isEmpty()
                 // and that were not just deleted from it
                 && !foldersForDeletionOnServer.contains( storage->imapPath() ) )
              mSubfoldersForSync << storage;
          }
          node = folder()->child()->next();
        }
      }
    }

    // All done for this folder.
    mProgress = 100; // all done
    newState( mProgress, i18n("Synchronization done"));

    if ( !mRecurse ) // "check mail for this folder" only
      mSubfoldersForSync.clear();

    // Carry on
  case SYNC_STATE_SYNC_SUBFOLDERS:
    {
      if( mCurrentSubfolder ) {
        disconnect( mCurrentSubfolder, SIGNAL( folderComplete(KMFolderCachedImap*, bool) ),
                    this, SLOT( slotSubFolderComplete(KMFolderCachedImap*, bool) ) );
        mCurrentSubfolder = 0;
      }

      if( mSubfoldersForSync.isEmpty() ) {
        mSyncState = SYNC_STATE_INITIAL;
        mAccount->addUnreadMsgCount( this, countUnread() ); // before closing
        close();
        emit folderComplete( this, TRUE );
      } else {
        mCurrentSubfolder = mSubfoldersForSync.front();
        mSubfoldersForSync.pop_front();
        connect( mCurrentSubfolder, SIGNAL( folderComplete(KMFolderCachedImap*, bool) ),
                 this, SLOT( slotSubFolderComplete(KMFolderCachedImap*, bool) ) );

        // kdDebug(5006) << "Sync'ing subfolder " << mCurrentSubfolder->imapPath() << endl;
        assert( !mCurrentSubfolder->imapPath().isEmpty() );
        mCurrentSubfolder->setAccount( account() );
        mCurrentSubfolder->serverSync( mRecurse /*which is true*/ );
      }
    }
    break;

  default:
    kdDebug(5006) << "KMFolderCachedImap::serverSyncInternal() WARNING: no such state "
              << mSyncState << endl;
  }
}

/* Connected to the imap account's connectionResult signal.
   Emitted when the slave connected or failed to connect.
*/
void KMFolderCachedImap::slotConnectionResult( int errorCode, const QString& errorMsg )
{
  disconnect( mAccount, SIGNAL( connectionResult(int, const QString&) ),
              this, SLOT( slotConnectionResult(int, const QString&) ) );
  if ( !errorCode ) {
    // Success
    mSyncState = SYNC_STATE_GET_USERRIGHTS;
    mProgress += 5;
    serverSyncInternal();
  } else {
    // Error (error message already shown by the account)
    newState( mProgress, KIO::buildErrorString( errorCode, errorMsg ));
    emit folderComplete(this, FALSE);
  }
}

/* find new messages (messages without a UID) */
QValueList<unsigned long> KMFolderCachedImap::findNewMessages()
{
  QValueList<unsigned long> result;
  for( int i = 0; i < count(); ++i ) {
    KMMsgBase *msg = getMsgBase( i );
    if( !msg ) continue; /* what goes on if getMsg() returns 0? */
    if ( msg->UID() == 0 )
      result.append( msg->getMsgSerNum() );
  }
  return result;
}

/* Upload new messages to server */
void KMFolderCachedImap::uploadNewMessages()
{
  QValueList<unsigned long> newMsgs = findNewMessages();
  if( !newMsgs.isEmpty() ) {

    newState( mProgress, i18n("Uploading messages to server"));
    CachedImapJob *job = new CachedImapJob( newMsgs, CachedImapJob::tPutMessage, this );
    connect( job, SIGNAL( progress( unsigned long, unsigned long) ),
             this, SLOT( slotPutProgress(unsigned long, unsigned long) ) );
    connect( job, SIGNAL( finished() ), this, SLOT( serverSyncInternal() ) );
    job->start();
  } else {
    newState( mProgress, i18n("No messages to upload to server"));

    serverSyncInternal();
  }
}

/* Progress info during uploadNewMessages */
void KMFolderCachedImap::slotPutProgress( unsigned long done, unsigned long total )
{
  // (going from mProgress to mProgress+10)
  int progressSpan = 10;
  newState( mProgress + (progressSpan * done) / total, QString::null );
  if ( done == total ) // we're done
    mProgress += progressSpan;
}

/* Upload message flags to server */
void KMFolderCachedImap::uploadFlags()
{
  if ( !uidMap.isEmpty() ) {
    mStatusFlagsJobs = 0;
    newState( mProgress, i18n("Uploading status of messages to server"));

    // FIXME DUPLICATED FROM KMFOLDERIMAP
    QMap< QString, QStringList > groups;
    //open(); //already done
    for( int i = 0; i < count(); ++i ) {
      KMMsgBase* msg = getMsgBase( i );
      if( !msg || msg->UID() == 0 )
        // Either not a valid message or not one that is on the server yet
        continue;

      QString flags = KMFolderImap::statusToFlags(msg->status());
      // Collect uids for each typem of flags.
      QString uid;
      uid.setNum( msg->UID() );
      groups[flags].append(uid);
    }
    QMapIterator< QString, QStringList > dit;
    for( dit = groups.begin(); dit != groups.end(); ++dit ) {
      QCString flags = dit.key().latin1();
      QStringList sets = KMFolderImap::makeSets( (*dit), true );
      mStatusFlagsJobs += sets.count(); // ### that's not in kmfolderimap....
      // Send off a status setting job for each set.
      for( QStringList::Iterator slit = sets.begin(); slit != sets.end(); ++slit ) {
        QString imappath = imapPath() + ";UID=" + ( *slit );
        mAccount->setImapStatus(folder(), imappath, flags);
      }
    }
    // FIXME END DUPLICATED FROM KMFOLDERIMAP

    if ( mStatusFlagsJobs ) {
      connect( mAccount, SIGNAL( imapStatusChanged(KMFolder*, const QString&, bool) ),
               this, SLOT( slotImapStatusChanged(KMFolder*, const QString&, bool) ) );
      return;
    }
  }
  newState( mProgress, i18n("No messages to upload to server"));
  serverSyncInternal();
}

void KMFolderCachedImap::slotImapStatusChanged(KMFolder* folder, const QString&, bool cont)
{
  if ( folder->storage() == this ) {
    --mStatusFlagsJobs;
    if ( mStatusFlagsJobs == 0 || !cont ) // done or aborting
      disconnect( mAccount, SIGNAL( imapStatusChanged(KMFolder*, const QString&, bool) ),
                  this, SLOT( slotImapStatusChanged(KMFolder*, const QString&, bool) ) );
    if ( mStatusFlagsJobs == 0 && cont ) {
      mProgress += 5;
      serverSyncInternal();
    }
  }
}


void KMFolderCachedImap::setStatus(QValueList<int>& ids, KMMsgStatus status, bool toggle)
{
  KMFolderMaildir::setStatus(ids, status, toggle);
  // This is not perfect, what if the status didn't really change? Oh well ...
  mStatusChangedLocally = true;
}

/* Upload new folders to server */
void KMFolderCachedImap::createNewFolders()
{
  QValueList<KMFolderCachedImap*> newFolders = findNewFolders();
  //kdDebug(5006) << label() << " createNewFolders:" << newFolders.count() << " new folders." << endl;
  if( !newFolders.isEmpty() ) {
    newState( mProgress, i18n("Creating subfolders on server"));
    CachedImapJob *job = new CachedImapJob( newFolders, CachedImapJob::tAddSubfolders, this );
    connect( job, SIGNAL( result(KMail::FolderJob *) ), this, SLOT( slotIncreaseProgress() ) );
    connect( job, SIGNAL( finished() ), this, SLOT( serverSyncInternal() ) );
    job->start();
  } else {
    serverSyncInternal();
  }
}

QValueList<KMFolderCachedImap*> KMFolderCachedImap::findNewFolders()
{
  QValueList<KMFolderCachedImap*> newFolders;
  if( folder() && folder()->child() ) {
    KMFolderNode *node = folder()->child()->first();
    while( node ) {
      if( !node->isDir() ) {
        if( static_cast<KMFolder*>(node)->folderType() != KMFolderTypeCachedImap ) {
          kdError(5006) << "KMFolderCachedImap::findNewFolders(): ARGH!!! "
                        << node->name() << " is not an IMAP folder\n";
          node = folder()->child()->next();
          assert(0);
        }
        KMFolderCachedImap* folder = static_cast<KMFolderCachedImap*>(static_cast<KMFolder*>(node)->storage());
        if( folder->imapPath().isEmpty() ) newFolders << folder;
      }
      node = folder()->child()->next();
    }
  }
  return newFolders;
}

bool KMFolderCachedImap::deleteMessages()
{
  /* Delete messages from cache that are gone from the server */
  QPtrList<KMMessage> msgsForDeletion;

  // It is not possible to just go over all indices and remove
  // them one by one because the index list can get resized under
  // us. So use msg pointers instead

  QMap<ulong,int>::const_iterator it = uidMap.constBegin();
  for( ; it != uidMap.end(); it++ ) {
    ulong uid ( it.key() );
    if( uid!=0 && !uidsOnServer.find( uid ) )
      msgsForDeletion.append( getMsg( *it ) );
  }

  if( !msgsForDeletion.isEmpty() ) {
    removeMsg( msgsForDeletion );
  }

  /* Delete messages from the server that we dont have anymore */
  if( !uidsForDeletionOnServer.isEmpty() ) {
    newState( mProgress, i18n("Deleting removed messages from server"));
    QStringList sets = KMFolderImap::makeSets( uidsForDeletionOnServer, true );
    uidsForDeletionOnServer.clear();
    kdDebug(5006) << "Deleting " << sets.count() << " sets of messages from server folder " << imapPath() << endl;
    CachedImapJob *job = new CachedImapJob( sets, CachedImapJob::tDeleteMessage, this );
    connect( job, SIGNAL( result(KMail::FolderJob *) ),
             this, SLOT( slotDeleteMessagesResult(KMail::FolderJob *) ) );
    job->start();
    return true;
  } else {
    return false;
  }
}

void KMFolderCachedImap::slotDeleteMessagesResult( KMail::FolderJob* job )
{
  if ( job->error() ) {
    // Skip the EXPUNGE state if deleting didn't work, no need to show two error messages
    mSyncState = SYNC_STATE_GET_MESSAGES;
  }
  mProgress += 10;
  serverSyncInternal();
}

void KMFolderCachedImap::checkUidValidity() {
  // IMAP root folders don't seem to have a UID validity setting.
  // Also, don't try the uid validity on new folders
  if( imapPath().isEmpty() || imapPath() == "/" )
    // Just proceed
    serverSyncInternal();
  else {
    newState( mProgress, i18n("Checking folder validity"));
    CachedImapJob *job = new CachedImapJob( FolderJob::tCheckUidValidity, this );
    connect( job, SIGNAL( result( KMail::FolderJob* ) ),
             this, SLOT( slotCheckUidValidityResult( KMail::FolderJob* ) ) );
    job->start();
  }
}

void KMFolderCachedImap::slotCheckUidValidityResult( KMail::FolderJob* job )
{
  if ( job->error() ) { // there was an error and the user chose "continue"
    // We can't continue doing anything in the same folder though, it would delete all mails.
    // But we can continue to subfolders if any. Well we can also try annotation/acl stuff...
    mSyncState = SYNC_STATE_HANDLE_INBOX;
  }
  mProgress += 5;
  serverSyncInternal();
}

/* This will only list the messages in a folder.
   No directory listing done*/
void KMFolderCachedImap::listMessages() {
  if( imapPath() == "/" ) {
    // Don't list messages on the root folder
    serverSyncInternal();
    return;
  }

  if( !mAccount->slave() ) { // sync aborted
    resetSyncState();
    emit folderComplete( this, false );
    return;
  }
  uidsOnServer.clear();
  uidsOnServer.resize( count() * 2 );
  uidsForDeletionOnServer.clear();
  mMsgsForDownload.clear();
  mUidsForDownload.clear();

  CachedImapJob* job = new CachedImapJob( FolderJob::tListMessages, this );
  connect( job, SIGNAL( result(KMail::FolderJob *) ),
           this, SLOT( slotGetLastMessagesResult(KMail::FolderJob *) ) );
  job->start();
}

void KMFolderCachedImap::slotGetLastMessagesResult(KMail::FolderJob *job)
{
  getMessagesResult(job, true);
}

// Connected to the listMessages job in CachedImapJob
void KMFolderCachedImap::slotGetMessagesData(KIO::Job * job, const QByteArray & data)
{
  KMAcctCachedImap::JobIterator it = mAccount->findJob(job);
  if ( it == mAccount->jobsEnd() ) { // Shouldn't happen
    kdDebug(5006) << "could not find job!?!?!" << endl;
    serverSyncInternal(); /* HACK^W Fix: we should at least try to keep going */
    return;
  }
  (*it).cdata += QCString(data, data.size() + 1);
  int pos = (*it).cdata.find("\r\n--IMAPDIGEST");
  if (pos > 0) {
    int a = (*it).cdata.find("\r\nX-uidValidity:");
    if (a != -1) {
      int b = (*it).cdata.find("\r\n", a + 17);
      setUidValidity((*it).cdata.mid(a + 17, b - a - 17));
    }
    a = (*it).cdata.find("\r\nX-Access:");
    if (a != -1) {
      int b = (*it).cdata.find("\r\n", a + 12);
      QString access = (*it).cdata.mid(a + 12, b - a - 12);
      mReadOnly = access == "Read only";
    }
    (*it).cdata.remove(0, pos);
  }
  pos = (*it).cdata.find("\r\n--IMAPDIGEST", 1);
  // Start with something largish when rebuilding the cache
  if ( uidsOnServer.size() == 0 )
    uidsOnServer.resize( KMail::nextPrime( 2000 ) );
  int flags;
  const int v = 42;
  while (pos >= 0) {
    KMMessage msg;
    msg.fromString((*it).cdata.mid(16, pos - 16));
    flags = msg.headerField("X-Flags").toInt();
    bool deleted = ( flags & 8 );
    ulong uid = msg.UID();
    if ( !deleted ) {
      if( uid != 0 ) {
        if ( uidsOnServer.count() == uidsOnServer.size() ) {
          uidsOnServer.resize( KMail::nextPrime( uidsOnServer.size() * 2 ) );
          kdDebug( 5006 ) << "Resizing to: " << uidsOnServer.size() << endl;
        }
        uidsOnServer.insert( uid, &v );
      }
      if (  uid <= lastUid() ) {
       /*
        * If this message UID is not present locally, then it must
        * have been deleted by the user, so we delete it on the
        * server also.
        *
        * This relies heavily on lastUid() being correct at all times.
        */
        // kdDebug(5006) << "KMFolderCachedImap::slotGetMessagesData() : folder "<<label()<<" already has msg="<<msg->headerField("Subject") << ", UID="<<uid << ", lastUid = " << mLastUid << endl;
        KMMsgBase *existingMessage = findByUID(uid);
          // if this is a read only folder, ignore status updates from the server
          // since we can't write our status back our local version is what has to
          // be considered correct.
        if( !existingMessage ) {
          // kdDebug(5006) << "message with uid " << uid << " is gone from local cache. Must be deleted on server!!!" << endl;
          uidsForDeletionOnServer << uid;
        } else {
          if (!mReadOnly) {
            /* The message is OK, update flags */
            KMFolderImap::flagsToStatus( existingMessage, flags );
          }
        }
        // kdDebug(5006) << "message with uid " << uid << " found in the local cache. " << endl;
      } else {
        // The message is new since the last sync, but we might have just uploaded it, in which case
        // the uid map already contains it.
        if ( !uidMap.contains( uid ) ) {
          ulong size = msg.headerField("X-Length").toULong();
          mMsgsForDownload << KMail::CachedImapJob::MsgForDownload(uid, flags, size);
          if( imapPath() == "/INBOX/" )
            mUidsForDownload << uid;
        }
        // Remember the highest uid and once the download is completed, update mLastUid
        if ( uid > mTentativeHighestUid )
          mTentativeHighestUid = uid;
      }
    }
    (*it).cdata.remove(0, pos);
    (*it).done++;
    pos = (*it).cdata.find("\r\n--IMAPDIGEST", 1);
  }
}

void KMFolderCachedImap::getMessagesResult( KMail::FolderJob *job, bool lastSet )
{
  mProgress += 10;
  if( job->error() ) { // error listing messages but the user chose to continue
    mContentState = imapNoInformation;
  } else {
    if( lastSet ) { // always true here (this comes from online-imap...)
      mContentState = imapFinished;
      mStatusChangedLocally = false; // we are up to date again
    }
  }
  serverSyncInternal();
}

void KMFolderCachedImap::slotProgress(unsigned long done, unsigned long total)
{
  int progressSpan = 100 - 5 - mProgress;
  //kdDebug(5006) << "KMFolderCachedImap::slotProgress done=" << done << " total=" << total << "=> mProgress=" << mProgress + ( progressSpan * done ) / total << endl;
  // Progress info while retrieving new emails
  // (going from mProgress to mProgress+progressSpan)
  newState( mProgress + (progressSpan * done) / total, QString::null );
}


void KMFolderCachedImap::setAccount(KMAcctCachedImap *aAccount)
{
  assert( aAccount->isA("KMAcctCachedImap") );
  mAccount = aAccount;
  if( imapPath()=="/" ) aAccount->setFolder( folder() );

  // Folder was renamed in a previous session, and the user didn't sync yet
  QString newName = mAccount->renamedFolder( imapPath() );
  if ( !newName.isEmpty() )
    folder()->setLabel( newName );

  if( !folder() || !folder()->child() || !folder()->child()->count() ) return;
  for( KMFolderNode* node = folder()->child()->first(); node;
       node = folder()->child()->next() )
    if (!node->isDir())
      static_cast<KMFolderCachedImap*>(static_cast<KMFolder*>(node)->storage())->setAccount(aAccount);
}


// This lists the subfolders on the server
// and (in slotListResult) takes care of folders that have been removed on the server
bool KMFolderCachedImap::listDirectory(bool secondStep)
{
  mSubfolderState = imapInProgress;
  if( !mAccount->slave() ) { // sync aborted
    resetSyncState();
    emit folderComplete( this, false );
    return false;
  }
  // reset
  if ( this == mAccount->rootFolder() )
    mAccount->setHasInbox( false );

  // get the folders
  ImapAccountBase::ListType type = ImapAccountBase::List;
  if ( mAccount->onlySubscribedFolders() )
    type = ImapAccountBase::ListSubscribed;
  ListJob* job = new ListJob( this, mAccount, type, secondStep,
      false, mAccount->hasInbox() );
  connect( job, SIGNAL(receivedFolders(const QStringList&, const QStringList&,
          const QStringList&, const QStringList&, const ImapAccountBase::jobData&)),
      this, SLOT(slotListResult(const QStringList&, const QStringList&,
          const QStringList&, const QStringList&, const ImapAccountBase::jobData&)));
  job->start();

  return true;
}

void KMFolderCachedImap::slotListResult( const QStringList& folderNames,
                                         const QStringList& folderPaths,
                                         const QStringList& folderMimeTypes,
                                         const QStringList& folderAttributes,
                                         const ImapAccountBase::jobData& jobData )
{
  //kdDebug(5006) << label() << ": folderNames=" << folderNames << " folderPaths=" << folderPaths << " mimeTypes=" << folderMimeTypes << endl;
  mSubfolderNames = folderNames;
  mSubfolderPaths = folderPaths;
  mSubfolderMimeTypes = folderMimeTypes;
  mSubfolderAttributes = folderAttributes;

  mSubfolderState = imapFinished;
  bool it_inboxOnly = jobData.inboxOnly;
  // pass it to listDirectory2
  mCreateInbox = jobData.createInbox;

  if (it_inboxOnly) {
    // list again only for the INBOX
    listDirectory(TRUE);
    return;
  }

  if ( folder()->isSystemFolder() && mImapPath == "/INBOX/"
       && mAccount->prefix() == "/INBOX/" )
  {
    // do not create folders under INBOX
    mCreateInbox = false;
    mSubfolderNames.clear();
  }
  folder()->createChildFolder();
  // Find all subfolders present on disk but not on the server
  KMFolderNode *node = folder()->child()->first();
  QPtrList<KMFolder> toRemove;
  while (node) {
    if (!node->isDir() ) {
      KMFolderCachedImap *f = static_cast<KMFolderCachedImap*>(static_cast<KMFolder*>(node)->storage());
      if ( mSubfolderNames.findIndex(node->name()) == -1 &&
          (node->name().upper() != "INBOX" || !mCreateInbox) )
      {
        // This subfolder isn't present on the server
        if( !f->imapPath().isEmpty()  ) {
          // The folder has an imap path set, so it has been
          // on the server before. Delete it locally.
          toRemove.append( f->folder() );
          kdDebug(5006) << node->name() << " isn't on the server. It has an imapPath -> delete it locally" << endl;
        } else { // shouldn't happen
          kdDebug(5006) << node->name() << " isn't on the server, but has no imapPath. ERROR - why didn't createNewFolders create it?" << endl;
        }
      } else { // folder both local and on server
        //kdDebug(5006) << node->name() << " is on the server." << endl;
      }
    } else {
      //kdDebug(5006) << "skipping dir node:" << node->name() << endl;
    }
    node = folder()->child()->next();
  }

  for ( KMFolder* doomed=toRemove.first(); doomed; doomed = toRemove.next() )
    kmkernel->dimapFolderMgr()->remove( doomed );

  mProgress += 5;
  serverSyncInternal();
}

// This synchronizes the local folders as needed (creation/deletion). No network communication here.
void KMFolderCachedImap::listDirectory2() {
  foldersForDeletionOnServer.clear();
  QString path = folder()->path();
  KMFolderCachedImap *f = 0;
  kmkernel->dimapFolderMgr()->quiet(true);

  if (mCreateInbox)
  {
    KMFolderNode *node;
    // create the INBOX
    for (node = folder()->child()->first(); node; node = folder()->child()->next())
      if (!node->isDir() && node->name() == "INBOX") break;
    if (node)
      f = static_cast<KMFolderCachedImap*>(static_cast<KMFolder*>(node)->storage());
    else {
      KMFolder* newFolder = folder()->child()->createFolder("INBOX", true, KMFolderTypeCachedImap);
      if (newFolder)
        f = static_cast<KMFolderCachedImap*>(newFolder->storage());
    }
    f->setAccount(mAccount);
    f->setImapPath("/INBOX/");
    f->folder()->setLabel(i18n("inbox"));
    if (!node) {
      f->close();
      kmkernel->dimapFolderMgr()->contentsChanged();
    }
    // so we have an INBOX
    mAccount->setHasInbox( true );
  }

  // Find all subfolders present on server but not on disk
  for (uint i = 0; i < mSubfolderNames.count(); i++) {

    if (mSubfolderNames[i].upper() == "INBOX" &&
        mSubfolderPaths[i] == "/INBOX/" &&
        mAccount->hasInbox()) // do not create an additional inbox
      continue;

    // Find the subdir, if already present
    KMFolderNode *node;
    for (node = folder()->child()->first(); node;
         node = folder()->child()->next())
      if (!node->isDir() && node->name() == mSubfolderNames[i]) break;

    if (!node) {
      // This folder is not present here
      // Either it's new on the server, or we just deleted it.
      QString subfolderPath = mSubfolderPaths[i];
      // The code used to look at the uidcache to know if it was "just deleted".
      // But this breaks with noContent folders and with shared folders.
      // So instead we keep a list in the account.
      bool locallyDeleted = mAccount->isDeletedFolder( subfolderPath );
      // That list is saved/restored across sessions, but to avoid any mistake,
      // ask for confirmation if the folder was deleted in a previous session
      // (could be that the folder was deleted & recreated meanwhile from another client...)
      if ( !locallyDeleted && mAccount->isPreviouslyDeletedFolder( subfolderPath ) ) {
           locallyDeleted = KMessageBox::warningYesNo(
             0, i18n( "<qt><p>It seems that the folder <b>%1</b> was deleted. Do you want to delete it from the server?</p></qt>" ).arg( mSubfolderNames[i] ) ) == KMessageBox::Yes;
      }

      if ( locallyDeleted ) {
        kdDebug(5006) << subfolderPath << " was deleted locally => delete on server." << endl;
        foldersForDeletionOnServer << subfolderPath;
      } else {
        kdDebug(5006) << subfolderPath << " is a new folder on the server => create local cache" << endl;
        KMFolder* newFolder = folder()->child()->createFolder(mSubfolderNames[i], false, KMFolderTypeCachedImap);
        if (newFolder)
          f = static_cast<KMFolderCachedImap*>(newFolder->storage());
        if (f) {
          f->close();
          f->setAccount(mAccount);
          kmkernel->dimapFolderMgr()->contentsChanged();
        } else {
          kdDebug(5006) << "can't create folder " << mSubfolderNames[i] <<endl;
        }
      }
    } else { // Folder found locally
      if( static_cast<KMFolder*>(node)->folderType() == KMFolderTypeCachedImap )
        f = static_cast<KMFolderCachedImap*>(static_cast<KMFolder*>(node)->storage());
    }

    if( f ) {
      // kdDebug(5006) << "folder("<<f->name()<<")->imapPath()=" << f->imapPath()
      //               << "\nSetting imapPath " << mSubfolderPaths[i] << endl;
      // Write folder settings
      f->setAccount(mAccount);
      f->setNoContent(mSubfolderMimeTypes[i] == "inode/directory");
      f->setNoChildren(mSubfolderMimeTypes[i] == "message/digest");
      f->setImapPath(mSubfolderPaths[i]);
    }
  }
  kmkernel->dimapFolderMgr()->quiet(false);
  emit listComplete(this);
  serverSyncInternal();
}

void KMFolderCachedImap::slotSubFolderComplete(KMFolderCachedImap* sub, bool success)
{
  Q_UNUSED(sub);
  //kdDebug(5006) << label() << " slotSubFolderComplete: " << sub->label() << endl;
  if ( success ) {
    serverSyncInternal();
  }
  else
  {
    // success == false means the sync was aborted.
    if ( mCurrentSubfolder ) {
      Q_ASSERT( sub == mCurrentSubfolder );
      disconnect( mCurrentSubfolder, SIGNAL( folderComplete(KMFolderCachedImap*, bool) ),
                  this, SLOT( slotSubFolderComplete(KMFolderCachedImap*, bool) ) );
      mCurrentSubfolder = 0;
    }

    mSubfoldersForSync.clear();
    mSyncState = SYNC_STATE_INITIAL;
    close();
    emit folderComplete( this, false );
  }
}

void KMFolderCachedImap::slotSimpleData(KIO::Job * job, const QByteArray & data)
{
  KMAcctCachedImap::JobIterator it = mAccount->findJob(job);
  if (it == mAccount->jobsEnd()) return;
  QBuffer buff((*it).data);
  buff.open(IO_WriteOnly | IO_Append);
  buff.writeBlock(data.data(), data.size());
  buff.close();
}


FolderJob*
KMFolderCachedImap::doCreateJob( KMMessage *msg, FolderJob::JobType jt, KMFolder *folder,
                                 QString, const AttachmentStrategy* ) const
{
  QPtrList<KMMessage> msgList;
  msgList.append( msg );
  CachedImapJob *job = new CachedImapJob( msgList, jt, folder? static_cast<KMFolderCachedImap*>( folder->storage() ):0 );
  job->setParentFolder( this );
  return job;
}

FolderJob*
KMFolderCachedImap::doCreateJob( QPtrList<KMMessage>& msgList, const QString& sets,
                                 FolderJob::JobType jt, KMFolder *folder ) const
{
  //FIXME: how to handle sets here?
  Q_UNUSED( sets );
  CachedImapJob *job = new CachedImapJob( msgList, jt, folder? static_cast<KMFolderCachedImap*>( folder->storage() ):0 );
  job->setParentFolder( this );
  return job;
}

void
KMFolderCachedImap::setUserRights( unsigned int userRights )
{
  mUserRights = userRights;
}

void
KMFolderCachedImap::slotReceivedUserRights( KMFolder* folder )
{
  if ( folder->storage() == this ) {
    disconnect( mAccount, SIGNAL( receivedUserRights( KMFolder* ) ),
                this, SLOT( slotReceivedUserRights( KMFolder* ) ) );
    if ( mUserRights == 0 ) // didn't work
      mUserRights = -1; // error code (used in folderdia)
    else
      mReadOnly = ( mUserRights & KMail::ACLJobs::Insert ) == 0;
    mProgress += 5;
    serverSyncInternal();
  }
}

void
KMFolderCachedImap::slotReceivedACL( KMFolder* folder, KIO::Job*, const KMail::ACLList& aclList )
{
  if ( folder->storage() == this ) {
    disconnect( mAccount, SIGNAL(receivedACL( KMFolder*, KIO::Job*, const KMail::ACLList& )),
                this, SLOT(slotReceivedACL( KMFolder*, KIO::Job*, const KMail::ACLList& )) );
    mACLList = aclList;
    serverSyncInternal();
  }
}

void
KMFolderCachedImap::setACLList( const ACLList& arr )
{
  mACLList = arr;
}

void
KMFolderCachedImap::slotMultiSetACLResult(KIO::Job *job)
{
  KMAcctCachedImap::JobIterator it = mAccount->findJob(job);
  if ( it == mAccount->jobsEnd() ) return; // Shouldn't happen
  if ( (*it).parent != folder() ) return; // Shouldn't happen

  if ( job->error() )
    // Display error but don't abort the sync just for this
    // PENDING(dfaure) reconsider using handleJobError now that it offers continue/cancel
    job->showErrorDialog();

  if (mAccount->slave()) mAccount->removeJob(job);
  serverSyncInternal();
}

void
KMFolderCachedImap::slotACLChanged( const QString& userId, int permissions )
{
  // The job indicates success in changing the permissions for this user
  // -> we note that it's been done.
  for( ACLList::Iterator it = mACLList.begin(); it != mACLList.end(); ++it ) {
    if ( (*it).userId == userId && (*it).permissions == permissions ) {
      if ( permissions == -1 ) // deleted
        mACLList.erase( it );
      else // added/modified
        (*it).changed = false;
      return;
    }
  }
}

// called by KMAcctCachedImap::killAllJobs
void KMFolderCachedImap::resetSyncState()
{
  mSubfoldersForSync.clear();
  mSyncState = SYNC_STATE_INITIAL;
  close();
  // Don't use newState here, it would revert to mProgress (which is < current value when listing messages)
  ProgressItem *progressItem = mAccount->mailCheckProgressItem();
  QString str = i18n("Aborted");
  if (progressItem)
     progressItem->setStatus( str );
  emit statusMsg( str );
}

void KMFolderCachedImap::slotIncreaseProgress()
{
  mProgress += 5;
}

void KMFolderCachedImap::newState( int progress, const QString& syncStatus )
{
  //kdDebug() << k_funcinfo << folder() << " " << mProgress << " " << syncStatus << endl;
  ProgressItem *progressItem = mAccount->mailCheckProgressItem();
  if( progressItem )
    progressItem->setCompletedItems( progress );
  if ( !syncStatus.isEmpty() ) {
    QString str;
    // For a subfolder, show the label. But for the main folder, it's already shown.
    if ( mAccount->imapFolder() == this )
      str = syncStatus;
    else
      str = QString( "%1: %2" ).arg( label() ).arg( syncStatus );
    if( progressItem )
      progressItem->setStatus( str );
    emit statusMsg( str );
  }
  if( progressItem )
    progressItem->updateProgress();
}

void KMFolderCachedImap::setSubfolderState( imapState state )
{
  mSubfolderState = state;
  if ( state == imapNoInformation && folder()->child() )
  {
    // pass through to childs
    KMFolderNode* node;
    QPtrListIterator<KMFolderNode> it( *folder()->child() );
    for ( ; (node = it.current()); )
    {
      ++it;
      if (node->isDir()) continue;
      KMFolder *folder = static_cast<KMFolder*>(node);
      static_cast<KMFolderCachedImap*>(folder->storage())->setSubfolderState( state );
    }
  }
}

void KMFolderCachedImap::setImapPath(const QString &path)
{
  mImapPath = path;
}

void KMFolderCachedImap::setContentsType( KMail::FolderContentsType type )
{
  if ( type != mContentsType ) {
    FolderStorage::setContentsType( type );
    mContentsTypeChanged = true;
  }
}

void KMFolderCachedImap::slotUpdateLastUid()
{
  if( mTentativeHighestUid != 0 )
    setLastUid( mTentativeHighestUid );
  mTentativeHighestUid = 0;
}

#include "kmfoldercachedimap.moc"

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