/*

* 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:  Class for command execution for Video Telephone application.

*

*/

#ifndef CLCVTCMDEXECUTOR_H_

#define CLCVTCMDEXECUTOR_H_

//  INCLUDES

#include    <e32base.h>

#include    <mvtengcommandobserver.h>

// FORWARD DECLARATIONS

class MVtEngCommandHandler;

class MLcVtEngineCommandManager;

// CLASS DECLARATION

/**

*  Class for command execution for Video Telephone application.

*

*  @since Series 60 2.6

*/

class CLcVtCmdExecutor

    : public CBase,

      private MVtEngCommandObserver

    {

    public: // Constructors and destructor

        /**

        * Constructor.

        *

        * @param aSelfPtr optional pointer to itself.

        * @param aCommandHandler command handler.

        * @param aCommandManager command manager.

        */

        CLcVtCmdExecutor(

            CLcVtCmdExecutor** aSelfPtr,

            MVtEngCommandHandler& aCommandHandler,

            MLcVtEngineCommandManager& aCommandManager );

        /**

        * Destructor.

        */

        ~CLcVtCmdExecutor();

    public: // New functions

        /**

        * Executes command.

        * @param aCommandId command identifier.

        * @param aParams parameters.

        * @param aRequest request status, optional.

        */

        void ExecuteCmdL(

            const TVtEngCommandId aCommandId,

            TDesC8* aParams,

            TRequestStatus* aRequest );

        /**

        * @see MVtEngCommandObserver::HandleVTCommandPerformedL.

        */

        virtual void HandleVTCommandPerformedL(

            TVtEngCommandId aCommand,

            const TInt aError );

    protected: // New functions

        /**

        * Completes dialog with error.

        * Note: this method will delete the dialog.

        * @param aError error code.

        */

        void Complete( const TInt aError );

    private:

        /**

        * Handles execution failure.

        * @param aResult error code.

        */

        void HandleExecuteFailed( TInt aResult );

    private:

        // Inner class.

        class CActiveCmd;

        // Friend.

        friend class CActiveCmd;

        //pointer to itself 

        CLcVtCmdExecutor** iSelfPtr;

        // Error code.

        TInt* iError;

        // Request status.

        TRequestStatus* iRequest;        

        // Ref to command handler.

        MVtEngCommandHandler& iCommandHandler;

        // Ref to command manager.

        MLcVtEngineCommandManager& iCommandManager;

        // Command to be executed.

        TVtEngCommandId iCommand;

        // Owned parameters.

        HBufC8* iCommandParams;

        // ETrue if command has been completed.

        TBool iCommandCompleted;

        // Owned active object to perform the command.

        CActiveCmd* iActiveCmd;        

        // ActiveSheduler Waiter inside CLcVtCmdExecutor

        CActiveSchedulerWait iWait;

    };

#endif /* CLCVTCMDEXECUTOR_H_ */