// Copyright (c) 2005-2009 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 FILES

#include <e32base.h>

#include <s32mem.h>

#ifdef SYMBIAN_FEATURE_MANAGER

	#include <featdiscovery.h>

	#include <featureuids.h>

#endif

#include <lbs.h>

#include <lbs/lbsadmin.h>

#include "lbslocservermessageenums.h"

#include <lbs/epos_cposmodules.h>

#include <lbs/epos_mposmodulesobserver.h>

#include "epos_proxypositionerconstructparams.h"

#include "lbsdevloggermacros.h"

#include "epos_cposmodulessettings.h"

#include "EPos_Global.h"

#include "EPos_ServerPanic.h"

#include "EPos_CPositionRequest.h"

#include "EPos_CPosSubSession.h"

#include "EPos_CPosLocMonitorReqHandlerHub.h"

// CONSTANTS

#ifdef _DEBUG

_LIT(KTraceFileName, "EPos_CPosSubSession.cpp");

#endif

const TInt KParamRequestorType = 0;

const TInt KParamRequestorFormat = 1;

const TInt KParamRequestorData = 2;

const TInt KParamRequestorStack = 0;

const TInt KParamUpdateOptions = 0;

// ==================== LOCAL FUNCTIONS ====================

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

// ResetAndDestroy Used for cleanup.

// This function is passed to a TCleanupItem

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

//

void ResetAndDestroyRRequestorStack(TAny* aPtr)

    {

    (reinterpret_cast<RRequestorStack*> (aPtr))->ResetAndDestroy();

    }

// ================= MEMBER FUNCTIONS =======================

/**

 *  C++ default constructor

 */

CPosSubSession::CPosSubSession() : iRequestors()

    {

    }

/**

 *  Symbian default constructor

 */

void CPosSubSession::ConstructL(

        CPosModuleSettings& aModuleSettings,

        CPosLocMonitorReqHandlerHub& aLocMonitorReqHandlerHub,

        TPositionModuleId aImplementationUid,

        MPosStatusObserver* aStatusObserver,

        MPosModuleStatusManager* aModuleStatusManager,

        TBool aIsProxy)

    {

    TProxyPositionerConstructParams positionerParams;

    positionerParams.iImplementationUid = aImplementationUid;

    positionerParams.iStatusObserver = aStatusObserver;

    positionerParams.iParamObserver = this;

    positionerParams.iModuleSettingsManager = &aModuleSettings;

    positionerParams.iModuleStatusManager = aModuleStatusManager; 

	iPositionRequest = CPositionRequest::NewL(

        aModuleSettings,

        aLocMonitorReqHandlerHub,

        positionerParams, 

        aIsProxy);

	//Need to call it to propogate iPsyDefaultUpdateTimeOut in case  

	//SetPsyDefaultUpdateTimeOut was called in the CPositionRequest::NewL

	//See SetPsyDefaultUpdateTimeOut implementation

	SetPsyDefaultUpdateTimeOut(iPsyDefaultUpdateTimeOut);

	iLocMonitorReqHandlerHub = &aLocMonitorReqHandlerHub;

#ifdef SYMBIAN_FEATURE_MANAGER

	iLocationManagementSupported = CFeatureDiscovery::IsFeatureSupportedL(NFeature::KLocationManagement);

#else

	__ASSERT_ALWAYS(EFalse, User::Invariant());	// Would happen on older versions of symbian OS if this code ever backported

#endif    

	if(iLocationManagementSupported)

		{

		iAdmin = CLbsAdmin::NewL();

		// connect to network registration status interface

		iNetRegStatus.OpenL();

		}

    }

/**

 * Two-phased constructor.

 *

 * @param aLastPositionHandler Last position handler.

 * @param aModulesDb the position log database.

 * @param aImplementationUid the positioner implementation uid.

 * @param aIsProxy ETrue if aImplementationUid represents a proxy PSY,

 *                 EFalse otherwise.

 * @param aStatusObserver status observer to be used by positioner.

 * @param aLocMonSession Location Monitor session handle shared by all subsessions

 */

CPosSubSession* CPosSubSession::NewLC(

    CPosModuleSettings& aModuleSettings,

    CPosLocMonitorReqHandlerHub& aLocMonitorReqHandlerHub,

    TUid aImplementationUid,

    TBool aIsProxy,

    MPosStatusObserver* aStatusObserver,

    MPosModuleStatusManager* aModuleStatusManager)

    {

    CPosSubSession* self = new (ELeave) CPosSubSession();

    CleanupClosePushL(*self);

    self->ConstructL(

        aModuleSettings, 

        aLocMonitorReqHandlerHub, 

        aImplementationUid, 

        aStatusObserver, 

        aModuleStatusManager,

        aIsProxy);

    return self;

    }

/**

 * Destructor.

 */

CPosSubSession::~CPosSubSession()

    {

    if(iLocationManagementSupported)

    	{

    	delete iAdmin;

    	iNetRegStatus.Close();

    	}

    iRequestors.ResetAndDestroy();    

    delete iPositionRequest;

    }

/**

 * This function is responsible for handling the

 * servicing of client requests to the server.

 * It uses the message passed as an argument to

 * obtain the request opcode and to access client

 * addresses for reading and writing.

 *

 * @param aMessage The current message

 */

void CPosSubSession::ServiceL(const RMessage2& aMessage)

    {

    switch (aMessage.Function())

        {

	    case ELbsSetSingleRequestor:

		    HandleSetRequestorL(aMessage);

		    break;

	    case ELbsSetMultipleRequestors:

		    HandleSetRequestorStackL(aMessage);

		    break;

	    case ELbsSetUpdateOptions:

		    HandleSetUpdateOptionsL(aMessage);

		    break;

	    case ELbsGetUpdateOptions:

		    HandleGetUpdateOptionsL(aMessage);

		    break;

	    case ELbsGetLastKnownPosition:

			LBS_RDEBUG("Client", "LBS", "GetLastKnownPosition");

		    HandleGetLastKnownPositionL(aMessage);

		    break;

	    case ELbsGetLastKnownPositionArea:

	    	HandleGetLastKnownPositionAreaL(aMessage); 

	    	break;

	    case ELbsPosNotifyPositionUpdate:

			LBS_RDEBUG("Client", "LBS", "NotifyPositionUpdate");

		    HandleNotifyPositionUpdateL(aMessage);

		    break;

	    case ELbsPositionerCancelAsyncRequest:

			LBS_RDEBUG("Client", "LBS", "CancelAsyncRequest");

            HandleCancelAsyncRequestL(aMessage);

            break;

        default:

        	DEBUG_TRACE("default switch case subsession ", __LINE__)

            User::Leave(KErrNotSupported);

		    break;

        }

    }

/**

 * From MPosParameterObserver.

 *

 * Get the position quality requested by the client.

 *

 * @param aRequestedPosQuality The requested position quality.

 */

TInt CPosSubSession::GetRequiredPositionQuality(TPositionQuality& /*aRequestedPosQuality*/) const

    {

    DEBUG_TRACE("GetRequiredPositionQuality()", __LINE__)

    // Not implemented yet.

    return KErrNotFound;

    }

/**

 * From MPosParameterObserver.

 *

 * Get the earliest allowed time of an old position fix, based on the

 * current max age set by the client.

 *

 * The PSY may save the result from the latest position request and

 * return the same result in the next position request if the client

 * says it's ok. Max age tells the PSY how old the stored position is

 * allowed to be. If the stored position is too old or the PSY does not

 * support max age, a normal positioning should be performed.

 *

 * @param aMaxAge On return, will contain the earliest allowed time of 

 *   an old position fix. If no max age is defined aMaxAge will contain 

 *   a time set to zero.

 */

void CPosSubSession::GetMaxAge(TTime& aMaxAge) const

    {

    DEBUG_TRACE("GetMaxAge()", __LINE__)

    if (iMaxUpdateAge != TTimeIntervalMicroSeconds(0))

        {

        aMaxAge.UniversalTime();

        aMaxAge -= iMaxUpdateAge;

        }

    else

        {

        aMaxAge = TTime(0);

        }

    }

/**

 * From MPosParameterObserver.

 *

 * Checks if the client allows a partial position update.

 *

 * A partial update result does not need to contain all parameters. The

 * only mandatory parameters are latitude, longitude and time of fix.

 * Everything else is optional.

 *

 * If a partial update is returned to the client in a

 * NotifyPositionUpdate() call, the completion code must be set to

 * KPositionPartialUpdate.

 * 

 * @return ETrue if partial position updates are allowed, otherwise

 *   EFalse.

 */

TBool CPosSubSession::IsPartialUpdateAllowed() const

    {

    DEBUG_TRACE("IsPartialUpdateAllowed()", __LINE__)

    return iAcceptPartialUpdates;

    }

/**

 * Called when a change has occurred in location settings db.

 * @param aEvent Event information

 */

void CPosSubSession::HandleSettingsChangeL(TPosModulesEvent aEvent)

    {

    __ASSERT_DEBUG(iPositionRequest, DebugPanic(EPosServerPanicGeneralInconsistency));

    iPositionRequest->HandleSettingsChangeL(aEvent);

    }

/**

 * Called when the server class is shutting down.

 */

void CPosSubSession::NotifyServerShutdown()

    {

    DEBUG_TRACE("NotifyServerShutdown", __LINE__)

    iPositionRequest->NotifyServerShutdown();

    }

void CPosSubSession::HandleSetRequestorL(const RMessage2& aMessage)

	{

    DEBUG_TRACE("EPositionerSetSingleRequestor", __LINE__)

    // Destroy previously set requestors before any leaving code is called.

	// If this method leaves, the requestor array must be empty so any

	// subsequent call to NotifyPositionUpdate returns KErrAccessDenied.

	iRequestors.ResetAndDestroy();

	TPckgBuf<CRequestor::TRequestorType> requestorType;

    User::LeaveIfError(Global::Read(aMessage, KParamRequestorType, requestorType));

    // the requestor must be a service

    if (requestorType() != CRequestor::ERequestorService)

        {

        User::Leave(KErrArgument);

        }

	TPckgBuf<CRequestor::TRequestorFormat> requestorFormat;

    User::LeaveIfError(Global::Read(aMessage, KParamRequestorFormat, requestorFormat));

    HBufC* data = Global::CopyClientBufferLC(aMessage, KParamRequestorData);

    CRequestor* requestor = CRequestor::NewLC(requestorType(), requestorFormat(), *data);

    ValidateRequestorL(requestor);

    iRequestors.Append(requestor); // takes ownership

    CleanupStack::Pop(requestor);

    iPositionRequest->NewTrackingSessionIfTracking();

    RequestComplete(aMessage, KErrNone);

    CleanupStack::PopAndDestroy(data);

	}

void CPosSubSession::HandleSetRequestorStackL(const RMessage2& aMessage)

	{

    DEBUG_TRACE("EPositionerSetMultipleRequestors", __LINE__)

    // Destroy previously set requestors before any leaving code is called.

	iRequestors.ResetAndDestroy();

    HBufC8* buf = Global::CopyClientBuffer8LC(aMessage, KParamRequestorStack);

	RDesReadStream stream(*buf);

	iRequestors.InternalizeL(stream);

	CleanupStack::PopAndDestroy(buf);

	// If this method leaves, the requestor array must be empty so any

	// subsequent call to NotifyPositionUpdate returns KErrAccessDenied.

    TCleanupItem cleanup(ResetAndDestroyRRequestorStack, &iRequestors);

    CleanupStack::PushL(cleanup);

    // Last requestor must be a service

    if (iRequestors.Count() > 0)

        {

        CRequestor* last = iRequestors[iRequestors.Count() - 1];

        if (last->RequestorType() != CRequestor::ERequestorService)

            {

            User::Leave(KErrArgument);

            }

        }

    else

        {

        User::Leave(KErrArgument);

        }

    // validate them all

    for (TInt i = 0; i < iRequestors.Count(); i++)

        {

        ValidateRequestorL(iRequestors[i]);

        }

    CleanupStack::Pop(&iRequestors);

    iPositionRequest->NewTrackingSessionIfTracking();

	RequestComplete(aMessage, KErrNone);

	}

void CPosSubSession::HandleSetUpdateOptionsL(const RMessage2& aMessage)

    {

    DEBUG_TRACE("EPositionerSetUpdateOptions", __LINE__)

    HBufC8* optionsBuf = Global::CopyClientBuffer8LC(aMessage, KParamUpdateOptions);

    TUint bufferSize = optionsBuf->Size();

    TPositionUpdateOptionsBase& optionsBase = reinterpret_cast

        <TPositionUpdateOptionsBase&>(const_cast<TUint8&>(*optionsBuf->Ptr()));

    // Check update options. Leaves if not accepted values.

    Global::ValidatePositionClassBufferL(optionsBase, optionsBuf->Des());

    Global::ValidatePositionClassTypeL(optionsBase, EPositionUpdateOptionsClass);

    TPositionUpdateOptions& options = 

        static_cast<TPositionUpdateOptions&>(optionsBase);

    if ((optionsBase.UpdateTimeOut().Int64() > 0) &&

        (optionsBase.UpdateInterval() >= optionsBase.UpdateTimeOut()))

        {

        User::Leave(KErrArgument);

        }

    // Max age must be less than the update interval if both are set.

	if (optionsBase.MaxUpdateAge().Int64() != 0 &&

        optionsBase.UpdateInterval().Int64() != 0 &&

        optionsBase.MaxUpdateAge() >= optionsBase.UpdateInterval())

        {

        User::Leave(KErrArgument);

        }

    iTracking = (optionsBase.UpdateInterval().Int64() != 0);

    iMaxUpdateAge = optionsBase.MaxUpdateAge();

    iAcceptPartialUpdates = options.AcceptPartialUpdates();

    iUpdateTimeOut = optionsBase.UpdateTimeOut();

    if(iUpdateTimeOut==0 && iPsyDefaultUpdateTimeOut>0)

    	{

    	optionsBase.SetUpdateTimeOut(iPsyDefaultUpdateTimeOut);

    	}

    iPositionRequest->SetUpdateOptions(optionsBase);

    CleanupStack::PopAndDestroy(optionsBuf);

    RequestComplete(aMessage, KErrNone);

    }

void CPosSubSession::HandleGetUpdateOptionsL(const RMessage2& aMessage)

    {    

    DEBUG_TRACE("EPositionerGetUpdateOptions", __LINE__)

    HBufC8* optionsBuf = Global::CopyClientBuffer8LC(aMessage, KParamUpdateOptions);

    TUint bufferSize = optionsBuf->Size();

    TPositionUpdateOptionsBase& optionsBase = reinterpret_cast

        <TPositionUpdateOptionsBase&>(const_cast<TUint8&>(*optionsBuf->Ptr()));

    Global::ValidatePositionClassBufferL(optionsBase, optionsBuf->Des());

    Global::ValidatePositionClassTypeL(optionsBase, EPositionUpdateOptionsClass);

    TPositionUpdateOptions& options = static_cast<TPositionUpdateOptions&>(optionsBase);

    iPositionRequest->GetUpdateOptions(optionsBase);

    optionsBase.SetMaxUpdateAge(iMaxUpdateAge);

    options.SetAcceptPartialUpdates(iAcceptPartialUpdates);

    optionsBase.SetUpdateTimeOut(iUpdateTimeOut);

    User::LeaveIfError(Global::Write(aMessage, KParamUpdateOptions, *optionsBuf));

    CleanupStack::PopAndDestroy(optionsBuf);

    RequestComplete(aMessage, KErrNone);

    }

void CPosSubSession::HandleGetLastKnownPositionL(const RMessage2& aMessage)

    {

    DEBUG_TRACE("EPositionerGetLastKnownPosition", __LINE__)

    if (aMessage.Int1() != EPositionInfoClass)

    	{

    	User::Leave(KErrArgument);

    	}

    if ( aMessage.Int2() < sizeof(TPositionInfo) )

    	{

    	User::Leave(KErrArgument);

    	}

    // Request the last known postion area from the CPosLocMonitorReqHandlerHub

    iLocMonitorReqHandlerHub->GetLastKnownPosReqL(aMessage);

    }

/* Check that a Self-locate is allowed, given the current network roaming status

*/

TBool CPosSubSession::IsSelfLocateEnabled()

	{

	DEBUG_TRACE("CPositionerSubSession::IsSelfLocateEnabled", __LINE__);

	__ASSERT_DEBUG((iAdmin != NULL) && (iLocationManagementSupported != EFalse), DebugPanic(EPosServerPanicGeneralInconsistency));

	TBool selfLocateAllowed(EFalse);

	CLbsAdmin::TSelfLocateService serviceStatus(CLbsAdmin::ESelfLocateOff);	

	RLbsNetworkRegistrationStatus::TLbsNetworkRegistrationStatus netRegStatus(RLbsNetworkRegistrationStatus::ENetworkRegistrationUnknown);

	// Read the current network registration	 status

	TInt err = iNetRegStatus.GetNetworkRegistrationStatus(netRegStatus);

	if (err == KErrNone)

		{

		// Read the appropriate admin setting

		switch (netRegStatus)

			{

			case RLbsNetworkRegistrationStatus::ERegisteredHomeNetwork:

				{

				err = iAdmin->Get(KLbsSettingHomeSelfLocate, serviceStatus);

				break;

				}

			case RLbsNetworkRegistrationStatus::ERegisteredRoamingNetwork:

				{

				err = iAdmin->Get(KLbsSettingRoamingSelfLocate, serviceStatus);

				break;

				}		

			case RLbsNetworkRegistrationStatus::ENotRegistered:

				{

				err = iAdmin->Get(KLbsSettingRoamingSelfLocate, serviceStatus);

				if(!err && serviceStatus == CLbsAdmin::ESelfLocateOff)

					{

					// in the case of notregistered we allow selflocate if *either* home or roaming setting is on:

					err = iAdmin->Get(KLbsSettingHomeSelfLocate, serviceStatus);

					}

				}

				break;

			case RLbsNetworkRegistrationStatus::ENetworkRegistrationUnknown:

			default:

				{

				serviceStatus = CLbsAdmin::ESelfLocateOff;

				break;

				}

			}

		}

	// Check to see if Self Locate is allowed

	if (err == KErrNone

	    && serviceStatus == CLbsAdmin::ESelfLocateOn)