/*

* Copyright (c) 2004 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:  Connection settings notifier implementation.

*

*/

// INCLUDE FILES

#include <E32std.h>

#include <impspresenceconnectionuiconstsng.h>

#include <MIMPSConnUiConnectionSettingsObserver.h>

#include "CIMPSConnUiConnectionSettingsNotifierImp.h"

#include "CnUiPanics.h"

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

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

// CIMPSConnUiConnectionSettingsNotifierImp::NewL()

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

//

CIMPSConnUiConnectionSettingsNotifierImp* CIMPSConnUiConnectionSettingsNotifierImp::NewL(

    CIMPSConnUiConnectionSettingsNotifier& aInterface,

    TIMPSConnectionClient aClient )

    {

    CIMPSConnUiConnectionSettingsNotifierImp* self =

        new ( ELeave ) CIMPSConnUiConnectionSettingsNotifierImp( aInterface,

                                                                 aClient );

    CleanupStack::PushL( self );

    self->ConstructL();

    CleanupStack::Pop( self ); //self

    return self;

    }

// Destructor

CIMPSConnUiConnectionSettingsNotifierImp::~CIMPSConnUiConnectionSettingsNotifierImp()

    {

    Dying();

    iObserverArray.Close();

    }

// C++ default constructor can NOT contain any code, that

// might leave.

//

CIMPSConnUiConnectionSettingsNotifierImp::CIMPSConnUiConnectionSettingsNotifierImp(

    CIMPSConnUiConnectionSettingsNotifier& aInterface,

    TIMPSConnectionClient aClient )

        : iInterface( aInterface ),

        iClient( aClient ),

        iStarted( EFalse ),

        iDying( EFalse )

    {

    }

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

// CIMPSConnUiConnectionSettingsNotifierImp::ConstructL()

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

//

void CIMPSConnUiConnectionSettingsNotifierImp::ConstructL()

    {

    }

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

// CIMPSConnUiConnectionSettingsNotifierImp::StartL()

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

//

void CIMPSConnUiConnectionSettingsNotifierImp::StartL()

    {

    //make here sanity checks to encapsulate

    //notifier behaviour

    if ( iDying )

        {

        //if dying, the notifier restart is silently ignored

        //notifier is evidently going down anyway

        return;

        }

    if ( iStarted )

        {

        User::Leave( KErrInUse );

        }

    if ( iObserverArray.Count() == 0 )

        {

        User::Leave( KErrNotReady );

        }

    TRAPD( err, DoStartL() );

    if ( err != KErrNone )

        {

        DoStop();

        User::Leave( err );

        }

    iStarted = ETrue;

    }

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

// CIMPSConnUiConnectionSettingsNotifierImp::Stop()

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

//

void CIMPSConnUiConnectionSettingsNotifierImp::Stop()

    {

    //notify observers from cancel

    StopAndNotifyObserversFromError( KErrCancel );

    }

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

// CIMPSConnUiConnectionSettingsNotifierImp::AddObserverL()

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

//

void CIMPSConnUiConnectionSettingsNotifierImp::AddObserverL(

    MIMPSConnUiConnectionSettingsObserver* aObserver )

    {

    __ASSERT_ALWAYS( aObserver,

                     CnUiPanicOrLeaveL( EIMPSConn_NULLPtr,

                                        KErrArgument ) );

    iObserverArray.AddObserverL( aObserver );

    }

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

// CIMPSConnUiConnectionSettingsNotifierImp::RemoveObserver()

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

//

TInt CIMPSConnUiConnectionSettingsNotifierImp::RemoveObserver(

    MIMPSConnUiConnectionSettingsObserver* aObserver )

    {

    return iObserverArray.RemoveObserver( aObserver );

    }

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

// CIMPSConnUiConnectionSettingsNotifierImp::ConnectionSettingByCategoryL()

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

//

TIMPSConnectionSettingsEvent

CIMPSConnUiConnectionSettingsNotifierImp::ConnectionSettingByCategoryL(

    TIMPSConnectionSettingsEvent /*aSettingsEventCateqory*/ )

    {

    return EIMPSCSEUnknown;

    }

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

// CIMPSConnUiConnectionSettingsNotifierImp::DoStartL()

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

//

void CIMPSConnUiConnectionSettingsNotifierImp::DoStartL()

    {

    }

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

// CIMPSConnUiConnectionSettingsNotifierImp::DoStop()

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

//

void CIMPSConnUiConnectionSettingsNotifierImp::DoStop()

    {

    }

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

// CIMPSConnUiConnectionSettingsNotifierImp::Dying()

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

//

void CIMPSConnUiConnectionSettingsNotifierImp::Dying()

    {

    iDying = ETrue;

    if ( iStarted )

        {

        iStarted = EFalse;

        DoStop();

        }

    }

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

// CIMPSConnUiConnectionSettingsNotifierImp::NotifyObserversFromEvent()

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

//

void CIMPSConnUiConnectionSettingsNotifierImp::NotifyObserversFromEvent(

    TIMPSConnectionSettingsEvent aEvent )

    {

    //if not running, don't notify the clients

    if ( !iStarted )

        {

        return;

        }

    iObserverArray.NotifyObservers( *this, aEvent );

    }

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

// CIMPSConnUiConnectionSettingsNotifierImp::StopAndNotifyObserversFromError()

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

//

void CIMPSConnUiConnectionSettingsNotifierImp::StopAndNotifyObserversFromError( TInt aError )

    {

    //if not running, don't notify the clients

    if ( !iStarted )

        {

        return;

        }

    //Error propagating from the underlying implementation

    //causes the notifier to stop. However, flag & actual

    //stopping must be done before notifying the clients

    //since some client may wan't to restart this notifier

    //in the notification callback...

    //Also the state must be set to "not started" before

    //actual stopping  since the stopping of some event

    //sources cause further KErrCancel events

    //(==>those will be filtered on !started check on above.)

    iStarted = EFalse;

    DoStop();

    //do the notify

    iObserverArray.NotifyObserversFromError( *this, aError );

    }

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

// CIMPSConnUiConnectionSettingsNotifierImp::MediateNotifyL()

// From MGenObserverNotifyMediator

// Forwards handling to pre-registered mediator function.

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

//

void CIMPSConnUiConnectionSettingsNotifierImp::MediateNotifyL(

    MIMPSConnUiConnectionSettingsObserver& aObserverToNotify,

    TIMPSConnectionSettingsEvent& aNotifyData )

    {

    aObserverToNotify.HandleConnectionSettingsEventL( &iInterface, aNotifyData );

    }

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

// CIMPSConnUiConnectionSettingsNotifierImp::MediateNotifyError()

// From MGenObserverNotifyMediator

// Forwards any error propagated from MediateNotifyL() to

// observer handle error.

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

//

void CIMPSConnUiConnectionSettingsNotifierImp::MediateNotifyError(

    MIMPSConnUiConnectionSettingsObserver& aObserverToNotify,

    TInt aLeaveError )

    {

    aObserverToNotify.HandleConnectionSettingsEventNotifyError( &iInterface, aLeaveError );

    }

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

// CIMPSConnUiConnectionSettingsNotifierImp::MediateError()

// From MGenObserverNotifyMediator

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

//

void CIMPSConnUiConnectionSettingsNotifierImp::MediateError(

    MIMPSConnUiConnectionSettingsObserver& aObserverToNotify,

    TInt aError )

    {

    aObserverToNotify.HandleConnectionSettingsEventNotifyError( &iInterface, aError );

    }

//  End of File