/*

* 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:  NWSessionSlot notifier API implementation

*

*/

#ifndef CPENGNWSESSIONSLOTNOTIFIER2IMP_H

#define CPENGNWSESSIONSLOTNOTIFIER2IMP_H

//  INCLUDES

#include <E32Base.h>

#include <PEngPresenceEngineConsts2.h>

#include "RGenericObserverArray.h"

#include "MPEngGlobalEventObserver.h"

//FORWARD DECLARATIONS

class CPEngNWSessionSlotNotifier2;

class CPEngNWSessionSlotEvent2;

class CPEngNWSessionSlotEvent2Copy;

class CPEngNWSessionSlotID2;

class CPEngNWSessionSlotID2Imp;

class MPEngNWSessionSlotObserver2;

/**

 * NWSessionSlot notifier API implementation

 *

 * @since 3.0

 */

NONSHARABLE_CLASS( CPEngNWSessionSlotNotifier2Imp ) : public CBase,

        public MPEngGlobalEventObserver

    {

public: /* Construction */

    /**

     * Instantiates CPEngNWSessionSlotNotifier2Imp object.

     *

     * @return New CPEngNWSessionSlotNotifier2Imp instance.

     */

    static CPEngNWSessionSlotNotifier2Imp* NewL(

        CPEngNWSessionSlotNotifier2& aInterface,

        TInt aPriority );

    /**

     * Destructor.

     */

    ~CPEngNWSessionSlotNotifier2Imp();

protected:

    /**

     * C++ constructor.

     */

    CPEngNWSessionSlotNotifier2Imp( CPEngNWSessionSlotNotifier2& aInterface,

                                    TInt aPriority );

    /**

     * Symbian OS constructor.

     */

    void ConstructL();

public: /* Session slot notifier implementation */

    /**

     * Implementation.

     * @since 3.0

     */

    void StartL( const CPEngNWSessionSlotID2Imp* aSlotIdFilter,

                 const TArray<TPEngNWSessionSlotEvent>* aEventFilter );

    void Stop();

    TBool IsActive() const;

    TInt PushNWSessionSlotStateToObservers( const CPEngNWSessionSlotID2& aMatchPattern );

    TInt GetNWSessionSlotState( const CPEngNWSessionSlotID2& aNWSessionSlotID,

                                TPEngNWSessionSlotState& aState ) const;

    TInt AddObserver( MPEngNWSessionSlotObserver2& aObserver );

    TInt RemoveObserver( MPEngNWSessionSlotObserver2& aObserver );

private: //Implementation

    /**

     * From MPEngGlobalEventObserver.

     */

    void HandleNewSessionSlotEventL( const CPEngSessionSlotEvent& aSessionEvent );

    void HandleObserverError( TInt aError );

    /**

     * Helpers.

     */

    void DoNotifyNWSessionSlotStatesL(

        const CPEngNWSessionSlotID2Imp& aSlotIdMatcher );

    void DeleteFilters();

    TBool IsEventAccepted( const CPEngNWSessionSlotID2& aNWSessionSlotID,

                           TPEngNWSessionSlotEvent aEvent ) const;

    void MediateNotify( TInt aError, CPEngNWSessionSlotEvent2& aEvent );

private: //Data

    //REF: Implemented interface

    CPEngNWSessionSlotNotifier2& iInterface;

    //OWN: The notifier priority

    TInt    iCActivePriority;

    //OWN: Observer array

    RGenericObserverArray< MPEngNWSessionSlotObserver2 >   iObsArray;

    //OWN: Slot ID filter

    CPEngNWSessionSlotID2Imp*   iSlotIdFilter;

    //OWN: Event filter

    RArray<TPEngNWSessionSlotEvent>* iEventFilter;

    //OWN: Event entry for notifications

    CPEngNWSessionSlotEvent2Copy* iEventEntry;

    //OWN: Flags describing the notifier state

    //     Flag contents are either EFalse or ETrue

    TInt8   iStarted;

    TInt8   iDying;

    TInt8   iSynchNotifyRunning;

    TInt8   iReserved2;

    };

#endif  //CPENGNWSESSIONSLOTNOTIFIER2IMP_H

// End of File