/*

* Copyright (c) 2002-2005 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:  Observer API for presence events

*

*/

#ifndef MCAPRESENCEOBSERVER_H

#define MCAPRESENCEOBSERVER_H

// INCLUDES

#include <e32std.h>

#include "MCAPresence.h"

// CLASS DECLARATION

/**

*  Class that wishes to receive events about changed presence flags

*  in friends-list.

*

*

*  @lib CAPresence.lib

*  @since 1.2

*/

class MCAPresenceObserver

    {

    public:

        /**

        * Gets called when presence state of a friend/friends

        * from friends-list changes. When client receives multiple updates

        * at once, this will still get called only once.

        */

        virtual void HandlePresenceChange() = 0;

        /**

        * Gets called when presence subscription failes. This is used when subscription

        * request has originated from somewhere else than UI itself.

        * @param aWVId UserID of failed subscription.

        */

        virtual void HandleSubscriptionError(

            const TDesC& aWVId,

            const TInt   aErrorCode ) = 0;

        /**

        * Gets called when own presence status changes

        */

        virtual void HandleOwnStatusChange( MCAPresence::TPresenceStatus aStatus ) = 0;

    protected:

        /**

        * Destructor.

        */

        virtual ~MCAPresenceObserver() {};

    };

#endif      // MCAPRESENCEOBSERVER_H

// End of File