/*

* Copyright (c) 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:  	The base class that provides the common functionalities of 

*				all the requests to the Location Monitor. Specific request handlers

*				derive from this class.

*

*/

#ifndef CPOSLOCMONITORREQHANDLERBASE_H_

#define CPOSLOCMONITORREQHANDLERBASE_H_

//--------------------------------------------------------------------------------------

//  INCLUDES

#include <e32property.h>

#include <e32base.h>

#include <e32err.h> 						

#include <lbspositioninfo.h>

#include <lbserrors.h>

//--------------------------------------------------------------------------------------

// CLASS DECLARATION

/**

  The active object that that provides the common functionalities of 

  all the requests to the Location Monitor such as maintaining a queue of requests

  and completing all the requests on the queue when an update from location monitor arrives.

 */

class CPosLocMonitorReqHandlerBase : public CActive

	{

public:

	void NotifySessionClosed(const CSession2* aSessionPtr);

	void NotifyServerShutDown();

	void NotifySubSessionClosed(const RMessage2& aMessage);

	virtual ~CPosLocMonitorReqHandlerBase();  

public:

	enum TLocMonitorRequestType

		{

		EReqOnSession,

		EReqOnSubSession,

		};

protected:

	CPosLocMonitorReqHandlerBase();

	// Destructors

    void RequestComplete(const RMessage2& aMessage, TInt aCompleteCode);

    void QRequestsComplete(TInt aCompleteCode);

    void CheckAndAddReqToQueueL(TLocMonitorRequestType aRequestType, const RMessage2& aMessage);

    void CancelRequest(TLocMonitorRequestType aRequestType, const RMessage2& aMessage);

private:

	static TBool MatchSessionAndSubsession(const RMessage2& qClient, const RMessage2& newClient);

    static TBool MatchSession(const RMessage2& qClient, const RMessage2& newClient);

	TInt MatchRequestInQueue (TLocMonitorRequestType aRequestType, const RMessage2& aMessage);

	void FindRequestAndCancel(TLocMonitorRequestType aRequestType, const RMessage2& aMessage);

protected:

	// The queue of requests

	RArray<RMessage2> 				iLocMonitorReqQ;

private:

	// A pointer to the function that compares two RMessage2 entries

	// Utilised in the call to the "Find" method of RArray

	TIdentityRelation<RMessage2> 	iSubsessionIdentity;  

	TIdentityRelation<RMessage2> 	iSessionIdentity;

	};

#endif /*CPOSLOCMONITORREQHANDLERBASE_H_*/