/*

* Copyright (c) 2005 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 "mcestateconfirming.h"

#include "mcesipsession.h"

#include "mceactionset.h"

#include "mcefcactionset.h"

#include "mceclientserver.h"

#include "mcesipextensions.h"

#include "mcenatmacros.h"

#include <sipdialogassocbase.h>

#include <sipdialog.h>

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

// CMceStateConfirming::CMceStateConfirming

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

//

CMceStateConfirming::CMceStateConfirming()

    : CMceState( KMceStateConfirming )

	{

	}

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

// CMceStateConfirming::~CMceStateConfirming

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

//

CMceStateConfirming::~CMceStateConfirming()

	{

	}

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

// CMceStateConfirming::DoAcceptL

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

//

TBool CMceStateConfirming::DoAcceptL( TMceStateTransitionEvent& aEvent )

	{

	User::LeaveIfError( 	                 

       aEvent.Code() == EMceResponse ||

       aEvent.Code() == EMceProvisionalResponse ||

       aEvent.Code() == EMceRedirectionResponse ||

       aEvent.Code() == EMceErrorResponse ||

       aEvent.Code() == EMceItcCancel ||

       aEvent.Code() == EMceMediaUpdated ||      

       aEvent.Code() == EMceItcEnable ||

       aEvent.Code() == EMceItcDisable ||

       IsExtensionRequestEvent( aEvent )

       ? KErrNone : KErrTotalLossOfPrecision );

	return ETrue;

	}

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

// CMceStateConfirming::EntryL

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

//

void CMceStateConfirming::EntryL( TMceStateTransitionEvent& aEvent )

	{

	if ( IsExtensionRequestEvent( aEvent ))

		{

		HandleExtensionRequestEventL( aEvent );	

		}

	else

		{

		CMceSipSession& session = aEvent.Session();

	    switch ( aEvent.Code() )

	        {

	        case EMceResponse:

	            {

	            EntryResponseL( aEvent );

	            break;

	            }

	        case EMceProvisionalResponse:

	            {

	            EntryProvisionalResponseL( aEvent );

	            break;

	            }

	        case EMceRedirectionResponse:

	        case EMceErrorResponse:

	            {

	            EntryErrorResponseL( aEvent );

	            break;

	            }

	        case EMceItcCancel:

	            {

	            EntryCancelL( aEvent );

	            break;

	            }

	        case EMceMediaUpdated:

	            {

	            EntryMediaUpdatedL( aEvent );

	            break;

	            }

	        case EMceItcEnable:

	        case EMceItcDisable:

	            {

	            session.Actions().ControlMediaL( aEvent.ParamIDs(), 

	                                             (TMceItcFunctions)aEvent.Code() );

	            break;

	            }  

	        default:

	            {

	            // NOP

	            break;

	            }

	        }

		}

	}

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

// CMceStateConfirming::ExitL

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

//

void CMceStateConfirming::ExitL( TMceStateTransitionEvent& aEvent )

	{

	if ( IsExtensionRequestEvent( aEvent ))

		{

		//Do Nothing;

		}

	else

		{

	    CMceSipSession& session = aEvent.Session();

	    switch ( aEvent.Code() )

	        {

	        case EMceMediaUpdated:

	            {

	            ExitMediaUpdatedL( aEvent );

	            break;

	            }

	        case EMceItcCancel:

	            {

	            session.Actions().StateChanged( KMceStateCanceled );

	            session.Actions().ClientStateChanged( aEvent.ParamIDs(), 

	                                                  CMceSession::ECancelling );

	            break;

	            }

	        case EMceErrorResponse:

	        case EMceRedirectionResponse:

	            {

	            // session canceled

	            session.Actions().StateChanged( KMceStateCanceled );

	            session.Actions().ClientStateChangedL( CMceSession::ECancelling,

	                                                   session.Response() );

	            break;                                                   

	            }

	        default:

	            {

	            break;

	            }

	        }

		}

	}

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

// CMceStateConfirming::EntryResponseL

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

//

void CMceStateConfirming::EntryResponseL( TMceStateTransitionEvent& aEvent )

    {

    CMceSipSession& session = aEvent.Session();

    RStringF trx = session.Response().Type();

    TMceReturnStatus status = KMceReady;

    CSIPClientTransaction& response = session.Response(); 

    TBool hasContent = MceSip::HasContent( response );

    if ( trx == SIPStrings::StringF( SipStrConsts::EInvite ) )

        {

        // 2xx to INVITE already, send ACK

        session.Actions().SendACKL( response );

        if ( hasContent )

            {

            // since the answer is already received, 

            // seize resending UPDATE/PRACK

            TBool interrupted = session.Actions().InterruptConfirming();

            User::LeaveIfError( interrupted ? 

                KErrNone : KErrTotalLossOfPrecision );

            // there is SDP, treat it as answer

            User::LeaveIfError( session.Actions().CreateSDP( response ) );

            session.Actions().DecodeL();

            status = session.Actions().UpdateL();

            if ( status == KMceReady )

                {

                if ( MCE_NEED_TO_SEND( session, NULL ) )

                    {

                    // send re-INVITE

                    session.Actions().EncodeL();

                    session.Actions().SendInviteL();

                    }

                aEvent.Code() = EMceMediaUpdated;

                }

            else if ( MCE_IS_ERROR( status ) )

                {

                User::Leave( status );

                }

            else // KMceAsync

                {

                // NOP

                }                

            }

        else

            {

            // TODO: IF ( answerNeeded ) 

            //       THEN wait until the PRACK/UPDATE generates a response.

            //       ELSE consider session established

            }

        }

    else if ( trx == SIPStrings::StringF( SipStrConsts::EUpdate ) ||

              trx == SIPStrings::StringF( SipStrConsts::EPrack ) )

        {

        // 2xx to PRACK/UPDATE

        if ( hasContent )

            {

            NAT_WAIT_NO_EXEC( session, (status = session.Actions().CreateSDP( response )));

            if ( !MCE_IS_ERROR( status ) && MCE_NEED_TO_SEND( session, NULL ) )

                {

                if ( session.ActiveBody().SecureSession() )

                	{

                	session.ActiveBody().SecureSession()->iLSReadyToBind = ETrue;

                	}

                session.SetFirstOffer();

                status = session.Actions().DecodeL();

                if ( status == KMceSipPreconditionFailure )

                	{

                	User::Leave( status );

                	}

                else

                	{

                	status = session.Actions().UpdateL();

                	}

                }

            }

        if ( status == KMceReady )

            {

            if ( ( MCE_NEED_TO_SEND( session, NULL ) || 

               ( trx == SIPStrings::StringF( SipStrConsts::EPrack ) &&

                 session.Extensions().RemoteIMSRel5() )  )&&

                 session.ActiveBody().Modifier( KMceSecPreconditions )!=

                 	 KMcePreconditionsE2ESupported )

                {

                if (!hasContent)

                    {

                        // Do nothing.

                    }

                else

                    {

                    status = session.Actions().UpdateL();

                    __ASSERT_ALWAYS( status == KMceReady, User::Leave( KErrArgument ) );

                    if ( session.ActiveBody().SecureSession() )

                    	{

                    	session.ActiveBody().SecureSession()->iLSReadyToBind = ETrue;

                    	}

                    NAT_WAIT_NO_EXEC( session, session.Actions().EncodeL() );

                    session.Actions().SendUpdateRequestL();

                    }

                }

            aEvent.Code() = EMceMediaUpdated;

            }

        else if ( MCE_IS_ERROR( status ) )

            {

            User::Leave( status );

            }

        else // KMceAsync

            {

            // NOP

            }

        aEvent.ParamStatus() = status;

        }

    else

        {

        User::Leave( KErrTotalLossOfPrecision );

        }

    }

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

// CMceStateConfirming::EntryProvisionalResponseL

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

//

void CMceStateConfirming::EntryProvisionalResponseL( 

                                        TMceStateTransitionEvent& /*aEvent*/ )

    {

    // IF retransmission THEN ignore

    // ELSE IF sent reliably THEN send PRACK

    // 

    // IF 180 ringing THEN give to application

    // TBD: What if 180 Ringing comes here?

    }

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

// CMceStateConfirming::EntryErrorResponseL

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

//    

void CMceStateConfirming::EntryErrorResponseL( 

                                        TMceStateTransitionEvent& aEvent )

    {

    CMceSipSession& session = aEvent.Session();

    RStringF trx = session.Response().Type();

    TUint code = MceSip::ResponseCode( session.Response() );

    if ( trx == SIPStrings::StringF( SipStrConsts::EInvite ) )

        {

        if ( session.SubState() == CMceSipSession::EOffering )

            {

            session.Actions().StateChanged( KMceStateTerminated );

            session.Actions().ClientStateChangedL( CMceSession::ETerminated,

                                                   session.Response() );

            }

        else if ( session.SubState() == CMceSipSession::EUpdating ||

              session.SubState() == CMceSipSession::ERefreshing )

        	{

      		if ( code == KMceSipCallOrTransactionDoesNotExist ||

                 code == KMceSipRequestTimeout ) 

	            { 

    	        session.Actions().UpdateFailed();

	            session.Actions().SendBYEL();

                session.Actions().StopMedia();

                session.FCActions().ReleaseFC();

                session.Actions().StateChanged( KMceStateTerminated );

            	session.Actions().ClientStateChangedL( CMceSession::ETerminated,

                                               session.Response() );

                }

         	else

                {

    	        session.Actions().UpdateFailed(); 

  	        	session.Actions().StateChanged( KMceStateEstablished );

				session.Actions().ClientStateChangedL( CMceSession::EEstablished, 

                                               *session.Body(),

                                               session.Response(),

                                               KErrCancel );

                }

        	}

        }

    else if ( trx == SIPStrings::StringF( SipStrConsts::EUpdate ) ||

              trx == SIPStrings::StringF( SipStrConsts::EPrack ) )

        {

        EntryCancelL( aEvent );

        }

    else

        {

        User::Leave( KErrTotalLossOfPrecision );

        }

    }

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

// CMceStateConfirming::EntryCancelL

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

//    

void CMceStateConfirming::EntryCancelL( TMceStateTransitionEvent& aEvent )

    {

    CMceSipSession& session = aEvent.Session();

    CMceSipSession::TSubState subState = session.SubState();

    //(try) send CANCEL

    session.Actions().SendCancelL();

    if ( subState == CMceSipSession::EOffering )

        {

        session.Actions().StopMedia();

        session.FCActions().ReleaseFC();

        }

    else if ( subState == CMceSipSession::EUpdating )

        {

        session.Actions().UpdateFailed();

        }    

    }

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

// CMceStateConfirming::EntryMediaUpdatedL

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

//    

void CMceStateConfirming::EntryMediaUpdatedL( TMceStateTransitionEvent& aEvent )

    {

    CMceSipSession& session = aEvent.Session();

    if ( MCE_NEED_TO_SEND( session, NULL ) )

        {

        NAT_WAIT_NO_EXEC( session, session.Actions().EncodeL() );

        if ( session.Dialog()->Dialog().State() == CSIPDialog::EEarly )

            {

            session.Actions().SendUpdateRequestL();    

            }

        else

            {

            session.Actions().SendInviteL();

            }

        }    

    }

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

// CMceStateConfirming::ExitMediaUpdatedL

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

//    

void CMceStateConfirming::ExitMediaUpdatedL( TMceStateTransitionEvent& aEvent )

    {

    CMceSipSession& session = aEvent.Session();

    CSIPClientTransaction* update = session.PendingTransaction(

        SIPStrings::StringF( SipStrConsts::EUpdate ) );

    if ( update && !MceSip::TrxCompleted( *update ) )

        {

        // just sent UPDATE

        session.Actions().StateChanged( KMceStateConfirming );

        }

    else

        {

        CSIPClientTransaction* invite = session.PendingTransaction( 

                    SIPStrings::StringF( SipStrConsts::EInvite ) );

        User::LeaveIfError( invite ? KErrNone : 

            KErrTotalLossOfPrecision );

        if ( invite->StateL() == CSIPTransactionBase::ETerminated )

            {

            // Just go to established state

            session.Actions().ClientStateChangedL( 

                                    CMceSession::EEstablished,

                                    *session.Body(),

                                    session.Response() );

            session.Actions().StateChanged( KMceStateEstablished );

            }

        else

            {

            session.Actions().StateChanged( KMceStateOffering );

            }

        }    

    }

// End of file