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/**
 *  kmacctcachedimap.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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
 *
 *  In addition, as a special exception, the copyright holders give
 *  permission to link the code of this program with any edition of
 *  the TQt library by Trolltech AS, Norway (or with modified versions
 *  of TQt that use the same license as TQt), 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
 *  TQt.  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 "kmacctcachedimap.h"
using KMail::SieveConfig;

#include "kmfoldertree.h"
#include "kmfoldermgr.h"
#include "kmfiltermgr.h"
#include "kmfoldercachedimap.h"
#include "kmmainwin.h"
#include "accountmanager.h"
using KMail::AccountManager;
#include "progressmanager.h"

#include <tdeio/passdlg.h>
#include <tdeio/scheduler.h>
#include <tdeio/slave.h>
#include <kdebug.h>
#include <kstandarddirs.h>
#include <tdeapplication.h>
#include <tdeconfig.h>

#include <tqstylesheet.h>

KMAcctCachedImap::KMAcctCachedImap( AccountManager* aOwner,
				    const TQString& aAccountName, uint id )
  : KMail::ImapAccountBase( aOwner, aAccountName, id ), mFolder( 0 ),
    mAnnotationCheckPassed(false),
    mGroupwareType( GroupwareKolab ),
    mSentCustomLoginCommand(false)
{
  // Never EVER set this for the cached IMAP account
  mAutoExpunge = false;
}


//-----------------------------------------------------------------------------
KMAcctCachedImap::~KMAcctCachedImap()
{
  killAllJobsInternal( true );
}


//-----------------------------------------------------------------------------
TQString KMAcctCachedImap::type() const
{
  return "cachedimap";
}

void KMAcctCachedImap::init() {
  ImapAccountBase::init();
}

//-----------------------------------------------------------------------------
void KMAcctCachedImap::pseudoAssign( const KMAccount * a ) {
  killAllJobs( true );
  if (mFolder)
  {
    mFolder->setContentState(KMFolderCachedImap::imapNoInformation);
    mFolder->setSubfolderState(KMFolderCachedImap::imapNoInformation);
  }
  ImapAccountBase::pseudoAssign( a );
}

//-----------------------------------------------------------------------------
void KMAcctCachedImap::setImapFolder(KMFolderCachedImap *aFolder)
{
  mFolder = aFolder;
  mFolder->setImapPath( "/" );
  mFolder->setAccount( this );
}


//-----------------------------------------------------------------------------
void KMAcctCachedImap::setAutoExpunge( bool /*aAutoExpunge*/ )
{
  // Never EVER set this for the cached IMAP account
  mAutoExpunge = false;
}

//-----------------------------------------------------------------------------
void KMAcctCachedImap::killAllJobs( bool disconnectSlave )
{
  //kdDebug(5006) << "killAllJobs: disconnectSlave=" << disconnectSlave << "  " << mapJobData.count() << " jobs in map." << endl;
  TQValueList<KMFolderCachedImap*> folderList = killAllJobsInternal( disconnectSlave );
  for( TQValueList<KMFolderCachedImap*>::Iterator it = folderList.begin(); it != folderList.end(); ++it ) {
    KMFolderCachedImap *fld = *it;
    fld->resetSyncState();
    fld->setContentState(KMFolderCachedImap::imapNoInformation);
    fld->setSubfolderState(KMFolderCachedImap::imapNoInformation);
    fld->sendFolderComplete(false);
  }
}

//-----------------------------------------------------------------------------
// Common between killAllJobs and the destructor - which shouldn't call sendFolderComplete
TQValueList<KMFolderCachedImap*> KMAcctCachedImap::killAllJobsInternal( bool disconnectSlave )
{
  // Make list of folders to reset. This must be done last, since folderComplete
  // can trigger the next queued mail check already.
  TQValueList<KMFolderCachedImap*> folderList;
  TQMap<TDEIO::Job*, jobData>::Iterator it = mapJobData.begin();
  for (; it != mapJobData.end(); ++it) {
    if ((*it).parent)
      folderList << static_cast<KMFolderCachedImap*>((*it).parent->storage());
    // Kill the job - except if it's the one that already died and is calling us
    if ( !it.key()->error() && mSlave ) {
      it.key()->kill();
      mSlave = 0; // killing a job, kills the slave
    }
  }
  mapJobData.clear();

  // Clear the joblist. Make SURE to stop the job emitting "finished"
  for( TQPtrListIterator<CachedImapJob> it( mJobList ); it.current(); ++it )
    it.current()->setPassiveDestructor( true );
  KMAccount::deleteFolderJobs();

  if ( disconnectSlave && mSlave ) {
    TDEIO::Scheduler::disconnectSlave( mSlave );
    mSlave = 0;
  }
  return folderList;
}

//-----------------------------------------------------------------------------
void KMAcctCachedImap::cancelMailCheck()
{
  // Make list of folders to reset, like in killAllJobs
  TQValueList<KMFolderCachedImap*> folderList;
  TQMap<TDEIO::Job*, jobData>::Iterator it = mapJobData.begin();
  for (; it != mapJobData.end(); ++it) {
    if ( (*it).cancellable && (*it).parent )
      folderList << static_cast<KMFolderCachedImap*>((*it).parent->storage());
  }
  // Kill jobs
  ImapAccountBase::cancelMailCheck();
  // Reset sync states and emit folderComplete, this is important for
  // KMAccount::checkingMail() to be reset, in case we restart checking mail later.
  for( TQValueList<KMFolderCachedImap*>::Iterator it = folderList.begin(); it != folderList.end(); ++it ) {
    KMFolderCachedImap *fld = *it;
    fld->resetSyncState();
    fld->setContentState(KMFolderCachedImap::imapNoInformation);
    fld->setSubfolderState(KMFolderCachedImap::imapNoInformation);
    fld->sendFolderComplete(false);
  }
}

// Reimplemented from ImapAccountBase because we only check one folder at a time
void KMAcctCachedImap::slotCheckQueuedFolders()
{
    mMailCheckFolders.clear();
    mMailCheckFolders.append( mFoldersQueuedForChecking.front() );
    mFoldersQueuedForChecking.pop_front();
    if ( mFoldersQueuedForChecking.isEmpty() )
      disconnect( this, TQT_SIGNAL( finishedCheck( bool, CheckStatus ) ),
                  this, TQT_SLOT( slotCheckQueuedFolders() ) );

    kmkernel->acctMgr()->singleCheckMail(this, true);
    mMailCheckFolders.clear();
}

void KMAcctCachedImap::processNewMail( bool /*interactive*/ )
{
  assert( mFolder );  // George says "better to crash then lose mail"

  if ( mMailCheckFolders.isEmpty() )
    processNewMail( mFolder, true );
  else {
    KMFolder* f = mMailCheckFolders.front();
    mMailCheckFolders.pop_front();

    // Only check mail if the folder really exists, it might have been removed by the sync in
    // the meantime.
    if ( f ) {
      processNewMail( static_cast<KMFolderCachedImap *>( f->storage() ), !checkingSingleFolder() );
    }
  }
}

void KMAcctCachedImap::processNewMail( KMFolderCachedImap* folder,
                                       bool recurse )
{
  assert( folder ); // George says "better to crash then lose mail"

  // This should never be set for a cached IMAP account
  mAutoExpunge = false;
  mCountLastUnread = 0;
  mUnreadBeforeCheck.clear();
  // stop sending noops during sync, that will keep the connection open
  mNoopTimer.stop();

  // reset namespace todo
  if ( folder == mFolder && !namespaces().isEmpty() ) {
    TQStringList nsToList = namespaces()[PersonalNS];
    TQStringList otherNSToCheck = namespaces()[OtherUsersNS];
    otherNSToCheck += namespaces()[SharedNS];
    for ( TQStringList::Iterator it = otherNSToCheck.begin();
          it != otherNSToCheck.end(); ++it ) {
      if ( (*it).isEmpty() ) {
        // empty namespaces are included in the "normal" listing
        // as the folders are created under the root folder
        nsToList += *it;
      }
    }
    folder->setNamespacesToList( nsToList );
  }

  Q_ASSERT( !mMailCheckProgressItem );
  mMailCheckProgressItem = KPIM::ProgressManager::createProgressItem(
    "MailCheck" + TQString::number( id() ),
    TQStyleSheet::escape( folder->label() ), // will be changed immediately in serverSync anyway
    TQString(),
    true, // can be cancelled
    useSSL() || useTLS() );
  connect( mMailCheckProgressItem, TQT_SIGNAL( progressItemCanceled( KPIM::ProgressItem* ) ),
           this, TQT_SLOT( slotProgressItemCanceled( KPIM::ProgressItem* ) ) );

  folder->setAccount(this);
  connect(folder, TQT_SIGNAL(folderComplete(KMFolderCachedImap*, bool)),
          this, TQT_SLOT(postProcessNewMail(KMFolderCachedImap*, bool)));
  folder->serverSync( recurse );
}

void KMAcctCachedImap::postProcessNewMail( KMFolderCachedImap* folder, bool )
{
  mNoopTimer.start( 60000 ); // send a noop every minute to avoid "connection broken" errors
  disconnect(folder, TQT_SIGNAL(folderComplete(KMFolderCachedImap*, bool)),
             this, TQT_SLOT(postProcessNewMail(KMFolderCachedImap*, bool)));
  mMailCheckProgressItem->setComplete();
  mMailCheckProgressItem = 0;

  if ( folder == mFolder ) {
    // We remove everything from the deleted folders list after a full sync.
    // Even if it fails (no permission), because on the next sync we want the folder to reappear,
    //  instead of the user being stuck with "can't delete" every time.
    // And we do it for _all_ deleted folders, even those that were deleted on the server in the first place (slotListResult).
    //  Otherwise this might have side effects much later (e.g. when regaining permissions to a folder we could see before)

#if 0 // this opens a race: delete a folder during a sync (after the sync checked that folder), and it'll be forgotten...
    mDeletedFolders.clear();
#endif
    mPreviouslyDeletedFolders.clear();
  }

  KMail::ImapAccountBase::postProcessNewMail();
}

void KMAcctCachedImap::addUnreadMsgCount( const KMFolderCachedImap *folder,
                                          int countUnread )
{
  if ( folder->imapPath() != "/INBOX/" ) {
    // new mail in INBOX is processed with KMAccount::processNewMsg() and
    // therefore doesn't need to be counted here
    const TQString folderId = folder->folder()->idString();
    int newInFolder = countUnread;
    if ( mUnreadBeforeCheck.find( folderId ) != mUnreadBeforeCheck.end() )
      newInFolder -= mUnreadBeforeCheck[folderId];
    if ( newInFolder > 0 )
      addToNewInFolder( folderId, newInFolder );
  }
  mCountUnread += countUnread;
}

void KMAcctCachedImap::addLastUnreadMsgCount( const KMFolderCachedImap *folder,
                                              int countLastUnread )
{
  mUnreadBeforeCheck[folder->folder()->idString()] = countLastUnread;
  mCountLastUnread += countLastUnread;
}

//
//
// read/write config
//
//

void KMAcctCachedImap::readConfig( /*const*/ TDEConfig/*Base*/ & config ) {
  ImapAccountBase::readConfig( config );
  // Apparently this method is only ever called once (from KMKernel::init) so this is ok
  mPreviouslyDeletedFolders = config.readListEntry( "deleted-folders" );
  mDeletedFolders.clear(); // but just in case...
  const TQStringList oldPaths = config.readListEntry( "renamed-folders-paths" );
  const TQStringList newNames = config.readListEntry( "renamed-folders-names" );
  TQStringList::const_iterator it = oldPaths.begin();
  TQStringList::const_iterator nameit = newNames.begin();
  for( ; it != oldPaths.end() && nameit != newNames.end(); ++it, ++nameit ) {
    addRenamedFolder( *it, TQString(), *nameit );
  }
  mGroupwareType = (GroupwareType)config.readNumEntry( "groupwareType", GroupwareKolab );
}

void KMAcctCachedImap::writeConfig( TDEConfig/*Base*/ & config ) /*const*/ {
  ImapAccountBase::writeConfig( config );
  config.writeEntry( "deleted-folders", mDeletedFolders + mPreviouslyDeletedFolders );
  config.writeEntry( "renamed-folders-paths", mRenamedFolders.keys() );
  const TQValueList<RenamedFolder> values = mRenamedFolders.values();
  TQStringList lstNames;
  TQValueList<RenamedFolder>::const_iterator it = values.begin();
  for ( ; it != values.end() ; ++it )
    lstNames.append( (*it).mNewName );
  config.writeEntry( "renamed-folders-names", lstNames );
  config.writeEntry( "groupwareType", mGroupwareType );
}

void KMAcctCachedImap::invalidateIMAPFolders()
{
  invalidateIMAPFolders( mFolder );
}

void KMAcctCachedImap::invalidateIMAPFolders( KMFolderCachedImap* folder )
{
  if( !folder || !folder->folder() )
    return;

  folder->setAccount(this);

  TQStringList strList;
  TQValueList<TQGuardedPtr<KMFolder> > folderList;
  kmkernel->dimapFolderMgr()->createFolderList( &strList, &folderList,
                                                folder->folder()->child(), TQString(),
                                                false );
  TQValueList<TQGuardedPtr<KMFolder> >::Iterator it;
  mCountLastUnread = 0;
  mUnreadBeforeCheck.clear();

  for( it = folderList.begin(); it != folderList.end(); ++it ) {
    KMFolder *f = *it;
    if( f && f->folderType() == KMFolderTypeCachedImap ) {
      KMFolderCachedImap *cfolder = static_cast<KMFolderCachedImap*>(f->storage());
      // This invalidates the folder completely
      cfolder->setUidValidity("INVALID");
      cfolder->writeUidCache();
    }
  }
  folder->setUidValidity("INVALID");
  folder->writeUidCache();

  processNewMailInFolder( folder->folder(), Recursive );
}

//-----------------------------------------------------------------------------
void KMAcctCachedImap::addDeletedFolder( KMFolder* folder )
{
  if ( !folder || folder->folderType() != KMFolderTypeCachedImap )
    return;
  KMFolderCachedImap* storage = static_cast<KMFolderCachedImap*>(folder->storage());
  addDeletedFolder( storage->imapPath() );
  kdDebug(5006) << k_funcinfo << storage->imapPath() << endl;

  // Add all child folders too
  if( folder->child() ) {
    KMFolderNode *node = folder->child()->first();
    while( node ) {
      if( !node->isDir() ) {
        addDeletedFolder( static_cast<KMFolder*>( node ) ); // recurse
      }
      node = folder->child()->next();
    }
  }
}

void KMAcctCachedImap::addDeletedFolder( const TQString& imapPath )
{
  mDeletedFolders << imapPath;
}

TQStringList KMAcctCachedImap::deletedFolderPaths( const TQString& subFolderPath ) const
{
  TQStringList lst;
  for ( TQStringList::const_iterator it = mDeletedFolders.begin(); it != mDeletedFolders.end(); ++it ) {
    if ( (*it).startsWith( subFolderPath ) )
      // We must reverse the order, so that sub sub sub folders are deleted first
      lst.prepend( *it );
  }
  for ( TQStringList::const_iterator it = mPreviouslyDeletedFolders.begin(); it != mPreviouslyDeletedFolders.end(); ++it ) {
    if ( (*it).startsWith( subFolderPath ) )
      lst.prepend( *it );
  }
  kdDebug(5006) << "KMAcctCachedImap::deletedFolderPaths for " << subFolderPath << " returning: " << lst << endl;
  Q_ASSERT( !lst.isEmpty() );
  return lst;
}

bool KMAcctCachedImap::isDeletedFolder( const TQString& subFolderPath ) const
{
  return mDeletedFolders.find( subFolderPath ) != mDeletedFolders.end();
}

bool KMAcctCachedImap::isPreviouslyDeletedFolder( const TQString& subFolderPath ) const
{
  return mPreviouslyDeletedFolders.find( subFolderPath ) != mPreviouslyDeletedFolders.end();
}

void KMAcctCachedImap::removeDeletedFolder( const TQString& subFolderPath )
{
  mDeletedFolders.remove( subFolderPath );
  mPreviouslyDeletedFolders.remove( subFolderPath );
}

void KMAcctCachedImap::addRenamedFolder( const TQString& subFolderPath, const TQString& oldLabel, const TQString& newName )
{
  mRenamedFolders.insert( subFolderPath, RenamedFolder( oldLabel, newName ) );
}

void KMAcctCachedImap::removeRenamedFolder( const TQString& subFolderPath )
{
  mRenamedFolders.remove( subFolderPath );
}

void KMAcctCachedImap::slotProgressItemCanceled( ProgressItem* )
{
  bool abortConnection = !mSlaveConnected;
  killAllJobs( abortConnection );
  if ( abortConnection ) {
    // If we were trying to connect, tell kmfoldercachedimap so that it moves on
    emit connectionResult( TDEIO::ERR_USER_CANCELED, TQString() );
  }
}

FolderStorage* KMAcctCachedImap::rootFolder() const
{
  return mFolder;
}


TQString KMAcctCachedImap::renamedFolder( const TQString& imapPath ) const
{
  TQMap<TQString, RenamedFolder>::ConstIterator renit = mRenamedFolders.find( imapPath );
  if ( renit != mRenamedFolders.end() )
    return (*renit).mNewName;
  return TQString();
}

#include "kmacctcachedimap.moc"