/*

* 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:  Concrete client login status handler.

*

*/

// INCLUDE FILES

#include <e32std.h>

#include "CCnUiClientStatusHandler.h"

/**

* Channel value for no logged

* in clients. Logged in clients are

* logically orred channel value.

* @since 2.1

*/

const TInt KCnUiNoLoggedInClients = 0;

// ================= GLOBAL FUNCTIONS =======================

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

// CreateClientStatusHandlerLC()

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

//

GLREF_C MCnUiClientStatusHandler* CreateClientStatusHandlerLC()

    {

    return CCnUiClientStatusHandler::NewLC();

    }

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

// Two-phased constructor.

CCnUiClientStatusHandler* CCnUiClientStatusHandler::NewLC()

    {

    CCnUiClientStatusHandler* self = new ( ELeave ) CCnUiClientStatusHandler;

    CleanupStack::PushL( self );

    self->ConstructL();

    return self;

    }

// Destructor

CCnUiClientStatusHandler::~CCnUiClientStatusHandler()

    {

    delete iLoginStastusChannel;

    }

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

// might leave.

//

CCnUiClientStatusHandler::CCnUiClientStatusHandler()

    {

    }

// Symbian OS default constructor can leave.

void CCnUiClientStatusHandler::ConstructL()

    {

    iLoginStastusChannel = CCnUiGroupChannel::NewL( ECnUiGlobalGroup,

                                                    ECnUiClientLoginLogoutStateChannel,

                                                    EFalse ); //permanent data

    }

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

// CCnUiClientStatusHandler::AnyClientLoggedIn()

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

//

TBool CCnUiClientStatusHandler::AnyClientLoggedIn()

    {

    TInt statusWord = KCnUiNoLoggedInClients;

    iLoginStastusChannel->Read( statusWord );

    //any client logged in

    if ( statusWord != 0 )

        {

        return ETrue;

        }

    return EFalse;

    }

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

// CCnUiClientStatusHandler::ClientLoggedIn()

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

//

TBool CCnUiClientStatusHandler::ClientLoggedIn( TIMPSConnectionClient aClient )

    {

    TInt statusWord = KCnUiNoLoggedInClients;

    iLoginStastusChannel->Read( statusWord );

    //Is the asked client logged in

    if ( statusWord & ( TInt ) aClient )

        {

        return ETrue;

        }

    return EFalse;

    }

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

// CCnUiClientStatusHandler::SetNoClientsLoggedInL()

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

//

void CCnUiClientStatusHandler::SetNoClientsLoggedInL()

    {

    iLoginStastusChannel->WriteL( KCnUiNoLoggedInClients );

    }

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

// CCnUiClientStatusHandler::SetClientLoggedInL()

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

//

void CCnUiClientStatusHandler::SetClientLoggedInL( TIMPSConnectionClient aClient )

    {

    TInt existingClients = KCnUiNoLoggedInClients;

    iLoginStastusChannel->Read( existingClients );

    //this client is among the other ones

    TInt loggedInClients = existingClients | ( TInt ) aClient;

    iLoginStastusChannel->WriteL( loggedInClients );

    }

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

// CCnUiClientStatusHandler::SetClientLoggedOutL()

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

//

void CCnUiClientStatusHandler::SetClientLoggedOutL( TIMPSConnectionClient aClient )

    {

    TInt existingClients = KCnUiNoLoggedInClients;

    iLoginStastusChannel->Read( existingClients );

    TInt loggedInClients = existingClients & ~( TInt ) aClient;

    iLoginStastusChannel->WriteL( loggedInClients );

    }

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

// CCnUiClientStatusHandler::NotifyClientStatusChangesL()

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

//

void CCnUiClientStatusHandler::NotifyClientLoginStatusChangesL(

    MCnUiClientStatusObserver* aObserver,

    TIMPSConnectionClient aClientToNotify )

    {

    __ASSERT_ALWAYS( !iClntStatusObserver, User::Leave( KErrInUse ) );

    __ASSERT_ALWAYS( aObserver, User::Leave( KErrArgument ) );

    //start the notifier

    iLoginStastusChannel->ListenL( this );

    //store observer information

    iClntStatusObserver = aObserver;

    iObservedClient = aClientToNotify;

    }

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

// CCnUiClientStatusHandler::CancelClientStatusNotify()

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

//

void CCnUiClientStatusHandler::CancelClientStatusNotify()

    {

    iLoginStastusChannel->CancelListen();

    iClntStatusObserver = NULL;

    }

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

// CCnUiClientStatusHandler::HandleNotifyL()

// from MSharedDataNotifyHandler

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

//

void CCnUiClientStatusHandler::HandleChannelMsg( TInt /*aGroupId*/,

                                                 TGCChannelID /*aChannelId*/,

                                                 TInt aRetMsg )

    {

    TBool clientNowLoggedIn = EFalse;

    //Is the asked client logged in

    if ( aRetMsg & ( TInt ) iObservedClient )

        {

        clientNowLoggedIn = ETrue;

        }

    iClntStatusObserver->HandleClientLoginStatusChange( iObservedClient, clientNowLoggedIn );

    }

//  End of File