/*

* Copyright (c) 2004-2006 Nokia Corporation and/or its subsidiary(-ies). 

* All rights reserved.

* This component and the accompanying materials are made available

* under the terms of "Eclipse Public License v1.0"

* which accompanies this distribution, and is available

* at the URL "http://www.eclipse.org/legal/epl-v10.html".

*

* Initial Contributors:

* Nokia Corporation - initial contribution.

*

* Contributors:

*

* Description:  Watcher for the PC-Suite data sync state

*

*/

#ifndef NSSCHBACKUPOBSERVER_H

#define NSSCHBACKUPOBSERVER_H

//  INCLUDES

#include <e32base.h>

#include "nssvasccontacthandlerimpl.h"

// Publish & Subscribe of the contact handler activity

#include <e32property.h>  

// CONSTANTS

// MACROS

// FORWARD DECLARATIONS

// CLASS DECLARATION

/**

 @todo generalize the common parts of this class and CNssVasBackupObserver from VAS API

       At the moment the code is copy-pasted and duplicated

*/

/**

* RProperty based data sync watcher implementation

*/

NONSHARABLE_CLASS( CNssChBackupObserver ) : public CActive

    {

    public:

        /** 

        *  Factory construction

        *  @param aDb Database 

        *  @return Constructed and already started observer

        */

        static CNssChBackupObserver* NewL( CNssContactHandlerImplementation& aHost );

        /** 

        * Destructor 

        */

        ~CNssChBackupObserver();

        /**

        * @return ETrue if some backup/restore action is in progress

        *         EFalse otherwise

        */

        TBool InProgress();

    private:

        /**

        * C++ constructor 

        */

        CNssChBackupObserver( CNssContactHandlerImplementation& aHost );

        /**

        * Symbian second phase constructor 

        */

        void ConstructL();

        /**

        * is called when data sync property changed 

        */

        void RunL();

        /**

        * Is called when system wants immediate cancelling of the watching 

        */

        void DoCancel();

    private:

        // Publish & Subscribe property about backup/restore 

        RProperty   iProperty;

        // Object to be notified about the backup/restore

        CNssContactHandlerImplementation& iHost;

        // ETrue if some backup/restore action is in progress

        TBool iInProgress;

    };

#endif // NSSCHBACKUPOBSERVER_H

// End of File