/*

* Copyright (c) 2004 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:   Defines class CNcnPublishAndSubscribeObserver.

*

*/

#ifndef NCNPUBLISHANDSUBSCRIBEOBSERVER_H

#define NCNPUBLISHANDSUBSCRIBEOBSERVER_H

//  INCLUDES

#include <e32base.h>

#include <e32property.h>

#include "NcnSubscribeHandler.h"

// CLASS DECLARATION

class CNcnModelBase;

class CNcnSubscriber;

/**

* Listens to the Phone idle status and other Properties

* through the Publish and Subscribe session.

*/

class CNcnPublishAndSubscribeObserver : public CBase, public MNcnSubscribeHandler

    {

    public:  // Constructors and destructor

        /**

        * C++ default constructor.

        */

        CNcnPublishAndSubscribeObserver( CNcnModelBase* aModel );

        /**

        * Two-phased constructor.

        */

        static CNcnPublishAndSubscribeObserver* NewL( CNcnModelBase* aModel );

        /**

        * Destructor.

        */

        virtual ~CNcnPublishAndSubscribeObserver();

    public:

        /*

        * Through this Publish and Subscribe is notified about state changes.

        * @param aCategory Property category.

        * @param aVariable The Property to be set

		* @param aState The value to be set for the aVariable Property

        */

        void NotifyPublishAndSubscribe( const TUid& aCategory, TUint aVariable, const TInt aState );

	public: //from base classes

		 /**

        * Through this method the Property subscribers notify of Property changes

        * @param aCategory The category of the property to be observed

		* @param aKey The subkey of the property to be observed

		*/

        void HandlePropertyChangedL( const TUid& aCategory, TInt aKey );

    private:

        /**

        * By default Symbian OS constructor is private.

        */

        void ConstructL();

        // By default, prohibit copy constructor

        CNcnPublishAndSubscribeObserver( const CNcnPublishAndSubscribeObserver& );

        // Prohibit assigment operator

        CNcnPublishAndSubscribeObserver& operator= ( const CNcnPublishAndSubscribeObserver& );

		 /**

        *  Determine idle state.

        * Reads iAutolockStatus, iCurrentCallStatus and iPhoneIdleState and informs 

        * model about the idle status

		*/

        void DetermineIdleState();

    private:    // Data

        // Property subscribers

		CNcnSubscriber* iSimChangedSubscriber;

		CNcnSubscriber* iPhoneIdleSubscriber;

		CNcnSubscriber* iAutolockSubscriber;

		CNcnSubscriber* iCurrentCallSubscriber;

		CNcnSubscriber* iSimUsableSubscriber;

         // A pointer to the event monitor.

        CNcnModelBase* iModel;

        // Stores the phone idle state status

        TInt iPhoneIdleState;

        // Stores the autolock status

        TInt iAutolockStatus;

        // Stores the current call status

        TInt iCurrentCallStatus;

    };

#endif      // NCNPUBLISHANDSUBSCRIBEOBSERVER_H

// End of File