/*

* Copyright (c) 2008 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:  Provides service enabling implementation.

*

*/

#ifndef C_PESERVICEHANDLING_H

#define C_PESERVICEHANDLING_H

#include <e32base.h>

#include <cch.h>

#include "mpeservicehandling.h"

class  MPEPhoneModelInternal;

/**

 *  CPEServiceHandling implements the intefaces MPEServiceHandling and 

 *  thus provides the service enabling imlementation for Phone Engine.

 *  

 *  @lib peservicehandling.lib

 *  @since S60 v5.0

 */

NONSHARABLE_CLASS( CPEServiceHandling ): public CBase,

                                         public MCchServiceStatusObserver,

                                         public MPEServiceHandling

    {

	public: // Constructors and destructor

	    /**

	     * Two-phased constructor.

	     */

	    IMPORT_C static CPEServiceHandling* NewL( MPEPhoneModelInternal& aModel );

	    /**

	     * Two-phased constructor.

	     */

	    IMPORT_C static CPEServiceHandling* NewLC( MPEPhoneModelInternal& aModel );

	    /**

	     * Destructors.

	     */

	    IMPORT_C virtual ~CPEServiceHandling();

	public: // from MPEServiceHandling

        /**

         * From MPEServiceHandling.

         * Enables service defined by the given identifier.

         * This function does the service enabling and service status error checking.

         * If service is enabled successfully, send message 

         * (EPEMessageServiceEnabled) to PhoneEngine. 

         * 

         * @since   S60 5.0

         * @param   aServiceId      Identifier of the service.

         */	                                    

	    void EnableServiceL( TInt aServiceId );

        /**

         * From MPEServiceHandling.

         * Cancel current service.

         */ 

	    void CancelServiceEnabling() const;

        /**

         * From MPEServiceHandling.

         * Disable service.

         */ 

        void DisableService() const;

    public: // from MCchServiceStatusObserver

        /**

         * From MCchServiceStatusObserver.

         * Signaled when service status or error changes.

         *

         * @param   aServiceId      Identifier of the service.

         * @param   aType           Service type.

         * @param   aServiceStatus  Service status.

         */

        void ServiceStatusChanged( TInt aServiceId, 

                                   const TCCHSubserviceType aType,

                                   const TCchServiceStatus& aServiceStatus );

	private: // Constructors

        /**

         * C++ default constructor.

         */

        CPEServiceHandling( MPEPhoneModelInternal& aModel );

        /**

         * By default Symbian 2nd phase constructor is private.

         */

        void ConstructL();

    private: // functions

        /**

         * Enable service, if not already enabled.

         *

         * @param  aState       Service state.

         * @param  aService     Service.

         * @return Error code.

         */

        TInt EnableServiceIfNeeded( const TCCHSubserviceState& aState, 

                                    CCchService& aService );

        /**

        * Sends ServiceHandlingError message to PhoneEngine and saves 

        * errorcode to member variable.

        * 

        * @param  aErrorCode, Cch errorcode.

        */	    

        void SendErrorMessage( TInt aErrorCode );

	private: // data

	    /**

	     * CCH client.

	     * Own.

	     */

	    CCch* iCchClient;

	    /**

	     * PhoneModel.

	     * Not own.

	     */

	    MPEPhoneModelInternal& iModel;

	    /**

	     * Current service identifier.

	     */

	    TInt iCurrentServiceId;

    };

#endif // C_PESERVICEHANDLING_H