/*

* 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:   Defines an abstract class CNcnMsvSessionObserverBase.

*

*/

#ifndef NCNMSVSESSIONOBSERVERBASE_H

#define NCNMSVSESSIONOBSERVERBASE_H

//  INCLUDES

#include    <msvapi.h>              // MsvSession class

#include    "MNcnMsvSessionHandlerObserver.h"

// CONSTANTS

const TUid KNcnSmsUid = { 0x1000102c }; 

// FORWARD DECLARATIONS

class CNcnModelBase;

class CMsvSession;

class CNcnHandlerAudio;

class TVwsViewId;

class CNcnNotifApiObserver;

class CNcnMsvSessionHandler;

class CVoiceMailManager;

// CLASS DECLARATION

/**

*  Receives and handles In-box events.

*/

class CNcnMsvSessionObserverBase : 

    public CBase, public MMsvEntryObserver,

    public MNcnMsvSessionHandlerObserver

    {

    public:  // Constructors and destructor

        /**

        * Class factory.

        */

        static CNcnMsvSessionObserverBase* NewL( 

            CNcnModelBase* aModel, CVoiceMailManager& aVMManager );

        /**

        * Destructor.

        */

        virtual ~CNcnMsvSessionObserverBase();

    public: // From MNcnMsvSessionHandlerObserver

        virtual void HandleMsvSessionReadyL( CMsvSession& aMsvSession );

        virtual void HandleMsvSessionClosedL();

    public: // Functions from base classes

        /**

        * From MMsvEntryObserver. Callback function. Handles global In-box 

        * events. This is a pure virtual function must be implemented in 

        * protocol specific subclasses.

        * @param aEvent An entry event.

        */

        virtual void HandleEntryEventL( 

            TMsvEntryEvent aEvent, 

            TAny* aArg1, 

            TAny* aArg2, 

            TAny* aArg3 ) = 0;

    protected:

        /**

        * C++ default constructor.

        */

        CNcnMsvSessionObserverBase(

            CNcnModelBase* aModel );

        /**

        * By default Symbian OS constructor is private.

        */

        virtual void ConstructL();

        /**

        * Checks the amount of unread messages in the global In-box.

        * This is a pure virtual function must be implemented in protocol specific subclasses.

        */

        virtual void CheckAmountOfUnreadMessagesInInboxL( TInt& aMsgCount, TInt& aAudioMsgCount ) = 0;         

    protected: //data

        // A pointer to the event monitor object.

        CNcnModelBase*  iModel;

        // In-box folder entry. Note that the entry is not owned by this class.

        CMsvEntry* iInboxFolder;

};

#endif      // NCNMSVSESSIONOBSERVERBASE_H

// End of File