/*

* Copyright (c) 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:  Handles extension commands

*

*/

#ifndef CCCEEXTENSION_H

#define CCCEEXTENSION_H

#include <e32base.h>

#include "mccpextensionobserver.h"

#include "mcceextensioninterface.h"

class CCCEPluginManager;

class CCCECallContainer;

class MCCPExtensionProvider;

class MCCEExtensionObserver;

class CConvergedCallProvider;

/**

 *  CCE Dtmf

 *

 *

 *

 *  @lib cce.dll

 *  @since S60 v3.2

 */

NONSHARABLE_CLASS(CCCEExtension): public CBase,

                             public MCCPExtensionObserver,

                             public MCCEExtensionInterface

    {

public:

    static CCCEExtension* NewL( CCCEPluginManager& aPluginManager );

    ~CCCEExtension();

    /**

    * Add observer to receive events 

    * @since S60 3.2

    * @param aObserver reference to observer

    * @return none

    */

    void AddObserverL( const MCCEExtensionObserver& aObserver );

    /**

    * Remove observer observer  

    * @since S60 3.2

    * @param aObserver reference to observer

    * @return System wide error code

    */

    TInt RemoveObserver( const MCCEExtensionObserver& aObserver );

public:

    // from base class MCCEExtensionInterface

    /** @see MCCEExtensionInterface::RequestCommand */

    TInt RequestCommand( TUint32 aServiceID, 

                        TDesC8& aData );

    /** @see MCCEExtensionInterface::CancelRequest */

    TInt CancelRequest( TUint32 aServiceID, 

    /** @see MCCEExtensionObserver::HandleExtensionEvents */

    void HandleExtensionEvents( TUint32 aServiceId,

private:

    void ConstructL();

    CCCEExtension( CCCEPluginManager& aPluginManager );

    CCCEPluginManager& iPluginManager;

    MCCEExtensionObserver* iMCCEExtensionObserver;

    };

#endif // CCCEEXTENSION_H