// Copyright (c) 2008-2009 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:

// Name          : sipalrsnapmonitor.cpp

// Part of       : SIP / SIP ALR Monitor

// Version       : SIP/6.0 

//

//  INCLUDES

#include "sipalrobserver.h"

#include "sipalrsnapmonitor.h"

#include "../../Profile/Inc/SipProfileLog.h"

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

// CSipAlrSnapMonitor::NewLC

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

//

CSipAlrSnapMonitor* CSipAlrSnapMonitor::NewLC(

    MSipAlrObserver& aObserver,

    RSocketServ& aSocketServer,

	{

  	CSipAlrSnapMonitor* self = 

  	    new ( ELeave ) CSipAlrSnapMonitor( 

    CleanupStack::PushL( self );

    self->ConstructL( aObserver );

    return self;	

	}

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

// CSipAlrSnapMonitor::CSipAlrSnapMonitor

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

//	

CSipAlrSnapMonitor::CSipAlrSnapMonitor( 

    RSocketServ& aSocketServer,

    CActive ( CActive::EPriorityStandard ),

    iSocketServer( aSocketServer ),

	{

	CActiveScheduler::Add( this );

	}

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

// CSipAlrSnapMonitor::ConstructL

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

//

void CSipAlrSnapMonitor::ConstructL( MSipAlrObserver& aObserver )

	{

	PROFILE_DEBUG1( "CSipAlrSnapMonitor::ConstructL entered" )

	iSystemStateMonitor.StartMonitoringL( 

  	AddObserverL( aObserver );

	PROFILE_DEBUG1( "CSipAlrSnapMonitor::ConstructL returns" )

	}

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

// CSipAlrSnapMonitor::~CSipAlrSnapMonitor

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

//

CSipAlrSnapMonitor::~CSipAlrSnapMonitor()

	{

	PROFILE_DEBUG1( "CSipAlrSnapMonitor::~CSipAlrSnapMonitor entered" )

    // MMobilityProtocolResp::Error is called from ~CActiveCommsMobilityApiExt.

    // Flag to prevent starting the RConnection.

	iDying = ETrue;

	ResetState();

	iObservers.Close();

	iSystemStateMonitor.StopMonitoring( 

	PROFILE_DEBUG1( "CSipAlrSnapMonitor::~CSipAlrSnapMonitor returns" )

	}

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

// CSipAlrSnapMonitor::RunL

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

// 

void CSipAlrSnapMonitor::RunL()

    {

    PROFILE_DEBUG3( "CSipAlrSnapMonitor::RunL, status:", iStatus.Int() )

    TInt err = iStatus.Int();

    if ( err == KErrNone )

        {

        iConnectionActive = ETrue;

        CreateMobilityAoL();

        // Generate initial IAP availability event

        TUint32 iap( 0 );

        iConnection.GetIntSetting( _L("IAP\\Id"), iap );

        NotifyObservers( iap ); // Gives only IAP available event

        if ( !iFirstStartHasSucceeded || iMigrationAllowedByClient )

            {

            // Don't wait for migration permission when the SNAP is started for

            // the very first time or when the whole SNAP has been unavailable.

            NotifyInitializedObservers( iap, MSipAlrObserver::EIapActive );

            iFirstStartHasSucceeded = ETrue;

            }

        }

	else if ( err == KErrCancel )

		{

		for ( TInt i = iObservers.Count() - 1; i >= 0; --i )

			{

			iObservers[i].iObserver->AlrEvent(

			}

		}

    else

        {

        ResetState();

        if ( err != KErrNotFound )

            {

            // Do not start SNAP again here if the error is KErrNotFound.

            // This error could indicate that the only IAP available is invalid 

            // and there would be an infinite loop until another valid IAP

            // becomes available.

            StartSnap();

            }

        }

    }

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

// CSipAlrSnapMonitor::DoCancel

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

// 	

void CSipAlrSnapMonitor::DoCancel()

    {

    iConnection.Close();

    }

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

// CSipAlrSnapMonitor::RunError

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

// 		

TInt CSipAlrSnapMonitor::RunError( TInt /*aError*/ )

    {    

    ResetState();

    return KErrNone;

    }

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

// CSipAlrSnapMonitor::PreferredCarrierAvailable

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

// 

void CSipAlrSnapMonitor::PreferredCarrierAvailable(

    TAccessPointInfo /*aOldAP*/, 

    TAccessPointInfo aNewAP, 

    TBool /*aIsUpgrade*/, 

    TBool /*aIsSeamless*/ )

    {

    PROFILE_DEBUG1( "CSipAlrSnapMonitor::PreferredCarrierAvailable" )

    iPreferredCarrierAvailableCalled = ETrue;

    NotifyObservers( aNewAP.AccessPoint() );

    }

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

// CSipAlrSnapMonitor::NewCarrierActive

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

//    	    

void CSipAlrSnapMonitor::NewCarrierActive(

    TAccessPointInfo aNewAP, 

    TBool /*aIsSeamless*/ )

    {

    NotifyInitializedObservers( aNewAP.AccessPoint(), 

                                MSipAlrObserver::EIapActive );

    }

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

// CSipAlrSnapMonitor::Error

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

// 	    

void CSipAlrSnapMonitor::Error( TInt aError )

    {

    PROFILE_DEBUG3( "CSipSnapAlrMonitor::Error aError=", aError )

    if ( !iCommsMobilityAO )

    	{

    	PROFILE_DEBUG1( "CSipSnapAlrMonitor::Error iCommsMobilityAO==NULL")

    	return;

    	}

	    {

	    NotifyInitializedObservers( KNoIap,

	    							MSipAlrObserver::ENoNewIapAvailable );

	    }

    // MMobilityProtocolResp::Error is called from ~CActiveCommsMobilityApiExt.

    // Flag iDying prevents starting the RConnection if not needed.

    if ( !iDying )

        {

        ResetState();

        StartSnap();

        }

    }

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

// CSipAlrSnapMonitor::SystemVariableUpdated

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

//

void CSipAlrSnapMonitor::SystemVariableUpdated( 

    CSipSystemStateMonitor::TSystemVariable aVariable,

    TInt aObjectId,

    TInt aValue )

    {

    PROFILE_DEBUG4( "CSipAlrSnapMonitor::SystemVariableUpdated, snap, value",

                    aObjectId, aValue )

    if ( !IsActive() &&

         aVariable == CSipSystemStateMonitor::ESnapAvailability &&

        {

        if ( aValue == CSipSystemStateMonitor::ESnapAvailable )

            {

            if ( StartSnap() != KErrNone )

                {

                ResetState();

                }

            }

        else

            {

            ResetState();

            }

        }

    }

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

// CSipAlrSnapMonitor::SnapId

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

//		

TUint32 CSipAlrSnapMonitor::SnapId() const

	{

	}

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

// CSipAlrSnapMonitor::AddObserverL

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

//

void CSipAlrSnapMonitor::AddObserverL( MSipAlrObserver& aObserver )

	{

	PROFILE_DEBUG1( "CSipAlrSnapMonitor::AddObserverL" )

	TSipAlrSnapObserverInfo newObserver;

	newObserver.iObserver = &aObserver;

	newObserver.iInitialEventDone = EFalse;

	iObservers.AppendL( newObserver );

	}

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

// CSipAlrSnapMonitor::DetachObserver

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

//

TBool CSipAlrSnapMonitor::DetachObserver( MSipAlrObserver& aObserver )

	{

	PROFILE_DEBUG1( "CSipAlrSnapMonitor::DetachObserver" )

	for ( TInt i = iObservers.Count() - 1; i >= 0; i-- )

		{

		if ( iObservers[i].iObserver == &aObserver )

			{

			iObservers.Remove( i );	

			}

		}

	return iObservers.Count() == 0;

	}

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

// CSipAlrSnapMonitor::RefreshL

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

//

void CSipAlrSnapMonitor::RefreshL()

	{

	PROFILE_DEBUG1( "CSipAlrSnapMonitor::RefreshL entered" )

    if ( iConnectionActive )

        {

		DestroyMobilityAo();

		PROFILE_DEBUG1( "CSipAlrSnapMonitor::RefreshL old ApiExt deleted" )

		// Earlier a new iCommsMobilityAO instance was created before deleting

		// old iCommsMobilityAO, but since it causes jam, now new instance is

		// created after deleting the old one.

		// If NewL fails, this CSipAlrSnapMonitor is useless and won't get

		// PreferredCarrierAvailable. If would let NewL leave here, then would

		// have to TRAP it from each place leading here.

		TRAPD( err, iCommsMobilityAO =

			   CActiveCommsMobilityApiExt::NewL( iConnection, *this ) );

		if ( err != KErrNone )

			{

			// Notify observers starting from the end of the array as it causes

			// entries to remove themselves from the array. This also leads to

			// CSipAlrMonitor::FreeResources, deleting this CSipAlrSnapMonitor.

			// So after last AlrEvent(), don't access this object's data.

			PROFILE_DEBUG3( "CSipAlrSnapMonitor::RefreshL error", err )

			for ( TInt i = iObservers.Count() - 1; i >= 0; --i )

				{

				iObservers[i].iObserver->AlrEvent(

				}

			}

        }

    PROFILE_DEBUG1( "CSipAlrSnapMonitor::Refresh returns" )

	}

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

// CSipAlrSnapMonitor::AllowMigration

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

//

void CSipAlrSnapMonitor::AllowMigration()

    {

    PROFILE_DEBUG1( "CSipAlrSnapMonitor::AllowMigration" )

    iMigrationAllowedByClient = ETrue;

    if ( iPreferredCarrierAvailableCalled && iCommsMobilityAO )

        {

        PROFILE_DEBUG1( "CSipAlrSnapMonitor::AllowMigration: migrating" )

        iCommsMobilityAO->MigrateToPreferredCarrier();

        }

    }

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

// CSipAlrSnapMonitor::DisallowMigration

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

//

void CSipAlrSnapMonitor::DisallowMigration()

    {

    PROFILE_DEBUG1( "CSipAlrSnapMonitor::DisallowMigration" )

    iMigrationAllowedByClient = EFalse;

    if ( iPreferredCarrierAvailableCalled && iCommsMobilityAO )

        {

        PROFILE_DEBUG1( "CSipAlrSnapMonitor::DisallowMigration: ignoring" )

        iCommsMobilityAO->IgnorePreferredCarrier();   

        }

    }

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

// CSipAlrMonitor::NewIapAccepted

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

//    

void CSipAlrSnapMonitor::NewIapAccepted()    

    {

    PROFILE_DEBUG1( "CSipAlrSnapMonitor::NewIapAccepted" )

    if ( iPreferredCarrierAvailableCalled && iCommsMobilityAO )

        {

        PROFILE_DEBUG1( "CSipAlrSnapMonitor::NewIapAccepted: accepting" )

        iCommsMobilityAO->NewCarrierAccepted();  

        }

    }

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

// CSipAlrMonitor::NewIapRejected

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

//  

void CSipAlrSnapMonitor::NewIapRejected()

    {

    PROFILE_DEBUG1( "CSipAlrSnapMonitor::NewCarrierRejected" )

    if ( iCommsMobilityAO )

        {

        PROFILE_DEBUG1( "CSipAlrSnapMonitor::NewCarrierRejected: rejecting" )

        iCommsMobilityAO->NewCarrierRejected();

        }

    }

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

// CSipAlrSnapMonitor::StartSnap

// Start SNAP if it is available.

// Otherwise just keep on waiting for the SNAP to become available.

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

//

TInt CSipAlrSnapMonitor::StartSnap()

    {

    PROFILE_DEBUG1( "CSipAlrSnapMonitor::StartSnap entered" )

    TInt err = KErrNone;

    if ( !IsActive() && IsSnapAvailable() )

        {

        PROFILE_DEBUG1( "CSipAlrSnapMonitor::StartSnap SNAP is available" )

    	err = iConnection.Open( iSocketServer );

		PROFILE_DEBUG3( "CSipAlrSnapMonitor::StartSnap Open done, err=", err )

    	if ( err == KErrNone )

    	    {

    	    }

        }

	PROFILE_DEBUG3( "CSipAlrSnapMonitor::StartSnap returns", err )

    return err;

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

// CSipAlrSnapMonitor::CreateMobilityAoL

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

//	

void CSipAlrSnapMonitor::CreateMobilityAoL()

    {

    PROFILE_DEBUG1( "CSipAlrSnapMonitor::CreateMobilityAoL entered" )

    CActiveCommsMobilityApiExt* newAo = 

        CActiveCommsMobilityApiExt::NewL( iConnection, *this );

    DestroyMobilityAo();

    iCommsMobilityAO = newAo;

    PROFILE_DEBUG1( "CSipAlrSnapMonitor::CreateMobilityAoL returns" )

    }

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

// CSipAlrSnapMonitor::ResetState

// Delete all the existing objects and wait for the SNAP become available.

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

//

void CSipAlrSnapMonitor::ResetState()

    {

    PROFILE_DEBUG1( "CSipAlrSnapMonitor::ResetState entered" )

    DestroyMobilityAo();

    Cancel();

    iMigrationAllowedByClient = EFalse;

    iConnectionActive = EFalse;

    iPreferredCarrierAvailableCalled = EFalse;

    PROFILE_DEBUG1( "CSipAlrSnapMonitor::ResetState returns" )

    }

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

// CSipAlrSnapMonitor::DestroyMobilityAo

// MMobilityProtocolResp::Error is called from ~CActiveCommsMobilityApiExt.

// To prevent an infinite loop, set iCommsMobilityAO to NULL before deleting it.

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

//

void CSipAlrSnapMonitor::DestroyMobilityAo()

    {

    CActiveCommsMobilityApiExt* tmp = iCommsMobilityAO;

    iCommsMobilityAO = NULL;

    delete tmp;

    }

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

// CSipAlrSnapMonitor::NotifyObservers

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

//

void CSipAlrSnapMonitor::NotifyObservers( TUint aIapId )

	{

	PROFILE_DEBUG4( "CSipSnapAlrMonitor::NotifyObservers SNAP, IAP",

	NotifyInitializedObservers( aIapId, MSipAlrObserver::EIapAvailable );

	NotifyNewObservers( aIapId );

	}

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

// CSipAlrSnapMonitor::NotifyInitializedObservers

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

//

void CSipAlrSnapMonitor::NotifyInitializedObservers( 

    TUint32 aIapId,

    MSipAlrObserver::TEvent aEvent )

	{	

	for (TInt i = iObservers.Count() - 1; i >= 0; --i) 

		{

		if ( iObservers[i].iInitialEventDone )

			{

			PROFILE_DEBUG3( "CSipAlrSnapMonitor::NotifyIntitializedObservers",

			}

		}

	}

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

// CSipAlrSnapMonitor::NotifyNewObservers

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

//

void CSipAlrSnapMonitor::NotifyNewObservers( TUint32 aIapId )

	{

	for ( TInt i = iObservers.Count() - 1; i >= 0; --i )

		{

		if ( !iObservers[i].iInitialEventDone )

			{

			iObservers[i].iObserver->AlrEvent(

			iObservers[i].iInitialEventDone = ETrue;

			}

		}

	}