// Copyright (c) 1997-2009 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:

//

#include "debug.h"

#include <e32base.h>

#include "COMMANDP.H"

#include "ABSTRACT.H"

#include "GLOBAL.H"

CommandProcessor::CommandProcessor()

	{

	m_iCommands = 0;

	m_iMaxCommands = 20;

	for(TInt i=0;i<m_iMaxCommands;i++)

		{

		m_CommandQueue[i] = NULL;

		}

	}

CommandProcessor::~CommandProcessor()

	{

	for(TInt i=0;i<m_iMaxCommands;i++)

		{

		//if(m_CommandQueue[i]!=NULL)

		//	{

			delete m_CommandQueue[i]; // Get rid of old commands!

		//	}

		}

	}

/*

* Method description:	Called from SCEP with a new command to add into the outgoing queue

*

* Parameter:			a_oCommand - pointer to a command to send

*/

void CommandProcessor::Add(AbstractCommand* a_oCommand)

	{	

	SCEPPRINT(_L("CommandProcessor: Add Command\n"));

	m_CommandQueue[m_iCommands++] = a_oCommand;

	if(m_iCommands >= m_iMaxCommands)

		{

		m_iCommands = 0; // yeah, sorry. We do leak old stuff for now.

		}

	}

/*

* Method description:	Called from SCEP when the application "pumps" the module for incoming/outgoing data processing

*

*/

void CommandProcessor::DoCommand()

	{	

	if(m_CommandQueue[0] != NULL)

		{

		SCEPPRINT(_L("CommandProcessor: DoCommand\n"));

		m_CommandQueue[0]->DoIt(); // we always execute the first command in the queue!

		delete m_CommandQueue[0];

		m_CommandQueue[0] = NULL; // well, it gets a new value below .. but anyway

		ShiftQueue();

		}

	}

	/*

	* Method description:	Private method called to shift new commands to the beginning of the queue

	*

*/

void CommandProcessor::ShiftQueue()

	{

	for(TInt i=1;i<m_iCommands;i++)

		{

		m_CommandQueue[i-1] = m_CommandQueue[i];

		}

	m_CommandQueue[m_iCommands] = NULL; // obsolete pointer

	m_iCommands--;

	if(m_iCommands<0) // can this happen?

		{

		m_iCommands=0;

		}

	}