/*

* Copyright (c) 2008 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:  Mediator service implementation

*

*/

// INCLUDE FILES

#include    "cvtengmediatorservice.h"

#include    "cvtenginternaloperation.h"

#include    "CVtEngStateManager.h"

#include    "CVtEngEventManager.h"

#include    "VtEngUtils.h"

#include    "CVtEngSettings.h"

#include    <cvtlogger.h>

#include    <MediatorCommandResponder.h>

#include    <videotelcontrolmediatorapi.h> 

#include    <videoteltophonecommandsapi.h>

#include    <vtinternalmediatorapi.h>

// CONSTANTS

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

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

// CVtEngMediatorService::StartLD

// Mediator service starter.

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

//

void CVtEngMediatorService::StartLD( 

        CMediatorCommandResponder& aResponder,

        CVtEngUtility& aUtils,

        const TUid aCategory,

        const TInt aCommand )

    {

    __VTPRINTENTER( "CVtEngMediatorService.StartLD" )

    CVtEngMediatorService* self = new ( ELeave ) CVtEngMediatorService(

        aResponder, aUtils, aCategory, aCommand );

    CleanupStack::PushL( self );

    self->ConstructAndDoServiceL();

    CleanupStack::Pop();

    __VTPRINTEXIT( "CVtEngMediatorService.StartLD" )

    }

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

// Destructor

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

//

CVtEngMediatorService::~CVtEngMediatorService()

    {

    // ensure this is removed

    __VTPRINTENTER( "CVtEngMediatorService::~CVtEngMediatorService" )

    iUtils.EventManager().RemoveObserver( this );

    // send response if destructed due to leave in ConstructAndDoServiceL

    SendMediatorResponseD( EFalse );

    __VTPRINTEXIT( "CVtEngMediatorService::~CVtEngMediatorService" )

    }

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

// CVtEngMediatorService::SetOperation

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

//

void CVtEngMediatorService::SetOperation( CVtEngOperation* /*aActiveOp*/ )

    {

    __VTPRINTENTER( "CVtEngMediatorService.SetOperation" )

    // no-op

    __VTPRINTEXIT( "CVtEngMediatorService.SetOperation" )

    }

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

// CVtEngMediatorService::CommandCompleteL

// callback to internal operation.

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

//

void CVtEngMediatorService::CommandCompleteL(

    const TVtEngCommandId /*aCommand*/,

    const TInt aResult )

    {

    __VTPRINTENTER( "CVtEngMediatorService.CommandCompleteL" )

    iServiceStatus = aResult;

    // Sends response to Telephony if not already sent by

    // HandleVtEventL -> SendMediatorResponseD

    SendMediatorResponseD( ETrue );

    __VTPRINTEXITR( "CVtEngMediatorService.CommandCompleteL %d", aResult )

    }

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

// CVtEngMediatorService::HandleVtEventL

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

//

void CVtEngMediatorService::HandleVtEventL( TInt aEvent )

    {

    __VTPRINTENTER( "CVtEngMediatorService.HandleVtEventL" )

    // This is registered event observer when shutdown mediator command was

    // received. Now send response if state precondition is met

    if ( aEvent == KVtEngSessionStateChanged &&

         IsShuttingDown() )

        {

        // no interest on events any more, task fulfilled

        iUtils.EventManager().RemoveObserver( this );

        // iServiceStatus used for mediator response

        iServiceStatus = KErrNone;

        SendMediatorResponseD( EFalse );

        }

    __VTPRINTEXIT( "CVtEngMediatorService.HandleVtEventL" )

    }

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

// CVtEngMediatorService::CVtEngMediatorService

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

//

CVtEngMediatorService::CVtEngMediatorService( 

    CMediatorCommandResponder& aResponder, 

    CVtEngUtility& aUtils,

    const TUid aCategory,

    const TInt aCommandId ) :

    iResponder( aResponder ), 

    iUtils( aUtils ),

    iCategory( aCategory ),

    iCommandId( aCommandId ),

    iServiceStatus( KErrNotReady )

    {

    __VTPRINTENTER( "CVtEngMediatorService.CVtEngMediatorService" )

    __VTPRINTEXIT( "CVtEngMediatorService.CVtEngMediatorService" )

    }

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

// CVtEngMediatorService::ConstructAndDoServiceL

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

//

void CVtEngMediatorService::ConstructAndDoServiceL()

    {

    __VTPRINTENTER( "CVtEngMediatorService.ConstructAndDoServiceL" )

    __VTPRINT2( DEBUG_GEN, " CVtEngMediatorService.ConstructAndDoServiceL command id=%d", iCommandId )

    // if starting of any operation below fails (StartOperationL leaves),

    // this object is deleted. Destructor sends mediator response.

    // non-supported command leads to leave+destructor also (see default case)

    if ( KCatVideotelInternalCommands == iCategory)

        {

        switch ( iCommandId )

            {

            case EVtMediatorReleaseDataport:

                if ( !IsShuttingDown()  )

                    {

                    // Mediator response is sent when state becomes appropriate, 

                    // indicated by call to HandleVtEventL, or

                    // when operation callback CommandCompleteL is called,

                    // which ever comes first. However, this object is deleted

                    // only after operation callback is received.

                    iUtils.EventManager().AddObserverL( this );

                    StartOperationL( KVtEngTerminateSession );

                    }     

                // if already shutting down this is no op (and self destructed)

                // if get this command because endactivecall from vt menu, do not do any op from here

                else 

                    {

                    SendMediatorResponseD(EFalse);

                    }

                break;

            default:

                // requested command that is not supported, issue "failed" response

                iServiceStatus = KErrNotSupported;            

                break;

            }

        }

    else

        {

        switch ( iCommandId )

            {

            case EVtCmdUnmute:

            case EVtCmdMute:

                {

                TVtEngCommandId engineCmd = ( iCommandId == 

                    EVtCmdUnmute ) ? KVtEngUnmuteOutgoingAudio : 

                    KVtEngMuteOutgoingAudio;

                if ( !IsShuttingDown()  )

                    {

                    StartOperationL( engineCmd );

                    }

                else

                    {

                    SendMediatorResponseD(EFalse);

                    }

                }

                break;

            default:

                // requested command that is not supported, issue "failed" response

                iServiceStatus = KErrNotSupported;            

                break;

            }     

        }

    if ( iServiceStatus != KRequestPending && !IsShuttingDown() )

        { // results in destruction of this object and sending of mediator 

          // response with error

        //__VTPRINT2( DEBUG_GEN, "CVtEngMediatorService.ConstructAndDoServiceL leave by iServiceStatus: %d", iServiceStatus )

        User::Leave( iServiceStatus );

        }

    __VTPRINTEXIT( "CVtEngMediatorService.ConstructAndDoServiceL" )

    }

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

// CVtEngMediatorService::IsShuttingDown

// Checks if shutdown is ongoing

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

//

TBool CVtEngMediatorService::IsShuttingDown() const

    {

    __VTPRINTENTER( "CVtEngMediatorService.IsShuttingDown" )

    const MVtEngSessionInfo::TSessionState state = 

        iUtils.StateManager()->SessionState();

    TBool isShuttingDown = EFalse;

    // consider shutdown true if clearing or idle

    if ( state == MVtEngSessionInfo::EClearing || 

         state == MVtEngSessionInfo::EIdle )

        {

        isShuttingDown = ETrue;            

        }

    __VTPRINTEXITR( "CVtEngMediatorService.IsShuttingDown %d",

        isShuttingDown )

    return isShuttingDown;

    }

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

// CVtEngMediatorService::StartOperationL

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

//

void CVtEngMediatorService::StartOperationL( const TVtEngCommandId aCommand )

    {

    __VTPRINTENTER( "CVtEngMediatorService.StartOperationL" )

    iOperation = CVtEngInternalOperation::NewL( 

        aCommand,

        iUtils.StateManager()->Handlers(),

        *this );        

    iOperation->ExecuteL();

    iServiceStatus = KRequestPending;

    __VTPRINTEXIT( "CVtEngMediatorService.StartOperationL" )

    }

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

// CVtEngMediatorService::SendMediatorResponseD

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

//

void CVtEngMediatorService::SendMediatorResponseD( const TBool aDeleteThis )

    {

    __VTPRINTENTER( "CVtEngMediatorService.SendMediatorResponseD" )

    __VTPRINT2( DEBUG_GEN, "CVtEngMediatorService.SendMediatorResponseD command: %d", iCommandId )

    if ( iCommandId != KErrNotFound )

        {

        if ( iCategory == KCatVideotelInternalCommands && iCommandId == EVtMediatorReleaseDataport )

            {

            iResponder.IssueResponse(

                KMediatorVideoTelephonyDomain,

                KCatVideotelInternalCommands,

                iCommandId,

                iServiceStatus,

                KNullDesC8() );

              }

        else

            {

            iResponder.IssueResponse(

                KMediatorVideoTelephonyDomain,

                KCatPhoneToVideotelCommands,

                iCommandId,

                iServiceStatus,

                KNullDesC8() );

            }

        // prevents further response because destructor also calls this method

        iCommandId = KErrNotFound;

        }

    if ( aDeleteThis )

        {

        // note! check above is mandatory because this method is called

        // also from destructor.

        delete this;

        }

    __VTPRINTEXIT( "CVtEngMediatorService.SendMediatorResponseD" )

    }

//  End of File