/*

* Copyright (c) 2005 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:  An implementation class for issuing Mediator Service commands.

*

*/

#ifndef MEDIATORCOMMANDINITIATORBODY_H

#define MEDIATORCOMMANDINITIATORBODY_H

// INCLUDES

#include <e32base.h>

#include "MediatorCommandInitiator.h"

#include "MediatorServerClient.h"

// CLASS DECLARATION

/**

*  A class used to issue Mediator Service commands.

*

*  @lib MediatorClient.lib

*  @since S60 3.1

*/

NONSHARABLE_CLASS(CMediatorCommandInitiatorBody) : public CActive

	{

    public:  // Constructors and destructor

        /**

        * Two-phased constructor.

        * 

        * @param aObserver  command response observer

        * @return a new MMediatorCommandResponseObserver instance.

        */

        static CMediatorCommandInitiatorBody* NewL(

            MMediatorCommandResponseObserver* aObserver );

        /**

        * Destructor.

        */

        virtual ~CMediatorCommandInitiatorBody();

    public: // Command initiating

        /**

        * Issue a Mediator Service command.

        * 

        * @since S60 3.1   

        * @param aDomain    The identifier of the domain     

        * @param aCategory  The identifier of the category.

        * @param aCommandId The identifier of the command.

        * @param aVersion   The version information for the command.

        * @param aData      The parameters of the command.

        * @return TInt      an error code

        */

        TInt IssueCommand( TUid aDomain, 

                           TUid aCategory, 

                           TInt aCommandId,

                           TVersion aVersion, 

                           const TDesC8& aData );

        /**

        * Cancel a Mediator Service command.

        * 

        * @since S60 3.1 

        * @param aDomain    The identifier of the domain         

        * @param aCategory  The identifier of the category.

        * @param aCommandId The identifier of the command.

        * @return None.

        */

        void CancelCommand( TUid aDomain, 

                            TUid aCategory, 

                            TInt aCommandId );

    protected:  // Functions from base classes

        /**

        * From CActive::RunL

        */

        void RunL();

        /**

        * From CActive::DoCancel()

        */

        void DoCancel();

    private:    // new functions

        /**

        * Start to wait command response asynchronously

        *

        * @since S60 3.1

        * @return None.

        */

        void WaitForCommandResponse();

        /**

        * Re-init return data buffer

        *

        * @since S60 3.1

        * @param aSize size of the buffer

        * @return None.

        */

        void ResetDataBufferL( TInt aSize );

    private:

        /**

        * C++ default constructor.

        *

        * @param aObserver  command response observer

        */

        CMediatorCommandInitiatorBody( 

                    MMediatorCommandResponseObserver* aObserver );

        /**

        * By default Symbian 2nd phase constructor is private.

        */

        void ConstructL();

    private: // Data

        // A session class to mediator server

        RMediatorServer     iMediatorServer;

        // Command response observer

        MMediatorCommandResponseObserver* iObserver;

        // Buffer for Command parameter data

        HBufC8*     iCommandData;

        TPtr8       iCommandDataPtr;

        // For category information 

        TMediatorCategory           iCategory;

        TMediatorCategoryRetBuffer  iCategoryBuffer;

        // For status information

        TInt                        iResponseStatus;

        TPckg<TInt>                 iStatusBuffer;

        // For command information

        MediatorService::TCommand   iCommand;

        TCommandRetBuffer           iCommandBuffer;

	};

#endif      // MEDIATORCOMMANDINITIATORBODY_H

// End of File