/** @file

* Copyright (c) 2005-2006 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:  State handler

*

*/

#ifndef C_CUPNPSTATEHANDLER_H

#define C_CUPNPSTATEHANDLER_H

//  INCLUDES

#include "e32base.h"

class TUpnpContainerUpdateId;

class CUpnpContentDirectory;

class CUpnpStateHandler :

        public CBase              

    {

    public: // Constructor and destructor

        /**

        * Two-phased constructor.

        */

        CUpnpStateHandler (  );

        /**

        * Destructor.

        */

        ~CUpnpStateHandler ();  

    public: // New functions

        static CUpnpStateHandler* NewL(CUpnpContentDirectory* aCd);         

        void  ConstructL(CUpnpContentDirectory* aCd);        

        /**

        * This fuction increases a value of SystemUpdateID. 

        * @since Series 60 2.6

        * @return a new value of SystemUpdateID 

        */

        TInt IncreaseSystemUpdateIdL();

        /**

        * This fuctions increases a container update ID.

        * @since Series 60 2.6

        * @param aContainerID a ID of the container whichs updateID is increased

        */

        void IncreaseContainerUpdateIdL( const TDesC8& aContainerID );

        RArray<TUpnpContainerUpdateId>& ContainerUpdateIds( );

        TInt ContainerUpdateId( const TDesC8& aContainerID );

        /**

        * This function is for informing service from evented statevariables.

        * @since Series 60 2.6

        * @param aVariableName Name of the evented statevariable.

        */

        void StateVariableEvented(const TDesC8& aVariableName);

        TBool IsEnable();

    private:        

        //array for containerUpdateId elements

        RArray<TUpnpContainerUpdateId>  iContainerUpdateIds;

        // This must be changed everytime when content changes.

        TUint iSystemUpdateId;

        // iContainerUpdateIds subarray. 

        //It contains info about some containers' changes,

        // collected before sending next NOTIFY event.             

        RArray<TUpnpContainerUpdateId>  iCurrentContainerUpdateIds;

        // this tells if statevariable is evented after last modification

        TBool iContainerUpdateIdsEvented;

        CUpnpContentDirectory* iCd;

    };

#endif      // C_CUPNPSTATEHANDLER_H

// End of File