// Copyright (c) 2006-2009 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:

// locationrequesthandler.h

// Definition of location request handler sub-component of agps manager

// 

//

/**

 @file

 @internalTechnology

*/

#ifndef LBSLOCREQHANDLER_H

#define LBSLOCREQHANDLER_H

#include <e32base.h>

#include "LbsInternalInterface.h"

#include "lbstimer.h"

#include <lbs/lbslocdatasourcegpsbase.h>

class MLocationRequestHandlerObserver

	{

public:

	enum TRequestStateChangeReason

		{

		EReasonNone,

		EReasonRequest,

		EReasonCancel,

		EReasonTimeout

		};

	virtual void OnLocationRequestStateChanged(const RLbsPositionUpdateRequests::TChannelIdentifer& aChannel,const TRequestStateChangeReason& aReason) = 0;

	virtual void OnSystemStatusAdvice(const RLbsPositionUpdateRequests::TChannelIdentifer& aChannel, TBool aTracking) = 0;

	virtual void OnPowerModeAdvice(const RLbsPositionUpdateRequests::TChannelIdentifer& aChannel, CLbsLocationSourceGpsBase::TPowerMode& aPowerMode) = 0;

	};

class CLocationRequestHandler :	public CActive, private MLbsCallbackTimerObserver

	{

public:

	enum TRequestState

		{

		EIdle,

		EActive,

		EActiveRestartOnTargetTime

		};

	static CLocationRequestHandler* NewL(MLocationRequestHandlerObserver& aObserver, const RLbsPositionUpdateRequests::TChannelIdentifer& aChannel);

	~CLocationRequestHandler();

	TBool IsAccuracyRequirementMet(TReal32 aHorizontalAccuracy, TReal32 aVerticalAccuracy);

	void RestartOnTargetTime();

	TBool IsRequestActive() const;

	void InvalidateRequest();

	//void RestartOnTargetTime();

	void CancelRestartOnTargetTime();

	TTime GetStartTime() const ;

	TTime GetTimeActivated() const;

	TLbsLocRequestQualityInt GetQuality() const ;

	TBool GetNewClient() const ;

	TPositionModuleInfo::TTechnologyType GetTechnologyTypeFromRequest(TInt aIndex) const;

	TBool GpsTimingOfCellFramesRequested() const;

private:

	CLocationRequestHandler(MLocationRequestHandlerObserver& aObserver,	const RLbsPositionUpdateRequests::TChannelIdentifer& aChannel); 

	void ConstructL(const RLbsPositionUpdateRequests::TChannelIdentifer& aChannel);

	// From CActive

	virtual void RunL();

	virtual void DoCancel();

	virtual TInt RunError(TInt aError);

	// From MLbsCallbackTimerObserver

	void OnTimerEventL(TInt aTimerId);

	TInt OnTimerError(TInt aTimerId, TInt aError);

	// Helpers

	void ActivateRequest();

	void CompleteSelf(TInt aReason);

	void ProcessAnyOutstandingRequestL();

	void ProcessSystemStatusAdvice(TLbsPositionUpdateRequestBase& aRequest);

	void ProcessPowerModeAdvice(TLbsPositionUpdateRequestBase::TPowerAdvice aMode);

private:

	MLocationRequestHandlerObserver& iObserver;

	RLbsPositionUpdateRequests iposUpdateReq;

	RLbsPositionUpdateRequests::TChannelIdentifer iChannel;

	TLbsPositionUpdateRequest iRequest;

	TRequestState iRequestState;

	CLbsCallbackTimer*	iTimer;

	// Stores the actual start time for immediate reqs

	// Needed when calculating max fix time for a combined request

	TTime	iRequestActivationTime;

	TBool iLastRequestWasCancel;

	};

#endif // LBSLOCREQHANDLER_H