/*

* Copyright (c) 2006 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:  This is the BT bearer plugin  notifier header file.

*

*/

#ifndef __BTPLUGINNOTIFIER_H__

#define __BTPLUGINNOTIFIER_H__

#include <e32base.h>

#include <btserversdkcrkeys.h>

#include <locodbearerpluginparams.h>      

#include <centralrepository.h>      

#include <locodbearer.h>

/**

 *  BT Plug in module for local connectivity daemon.

 *

 *  This active object checks BT state from central repository and start 

 *  watching BT ON/OFF state. If BT is ON, it connects to BTEngine server.

 *  It  continues to watch the key and when it has changed, it notifies 

 *  the daemon through its callback function.

 *

 *  @lib btbearer.lib

 *  @since S60 v3.2

 */

NONSHARABLE_CLASS( CBTPluginNotifier ) : public CActive

    {

public:

    /**  Enumeration of CenRep key types */

    enum TCenRepKeyType

        {

        EKeyInt,

        EKeyReal,

        EKeyBinary,

        EKeyString

        };

    /**

     * Two-phase constructor

     *

     * @param aObserver Reference to the callback class.

     * @param aUid The UID that identifies the repository.

     * @param aKeyType Key type.

     * @param aId The ID of the key.

     * @return CBTPluginNotifier Initialized object.

     */

	static CBTPluginNotifier* NewL( MLocodBearerPluginObserver& aObserver, 

	                                TUid aUid, TCenRepKeyType aKeyType, 

	                                TUint32 aId );

    /**

     * Destructor

     */

	virtual ~CBTPluginNotifier();

private:

    /**

     * C++ default constructor

     */

    CBTPluginNotifier( MLocodBearerPluginObserver& Param, TUid aUid, 

	                   TCenRepKeyType aKeyType, TUint32 aId );

    /**

     * Symbian 2nd-phase constructor

     */

    void ConstructL();

    /**

     * Subscribes to the change of central repository keys

     *

     * @since S60 v3.2

     */

    void SubscribeL();

    /**

     * Handles service load/unload when BT power changes.

     */

    void HandleBtPowerChanged( TBTPowerStateValue aPower );

// from base class CActive

    /**

     * From CActive.

     * Called by the active scheduler when our subscription 

     * to the setting has been cancelled.

     *

     * @since S60 v3.2

     */

    void DoCancel();

    /**

     * From CActive.

     * Called by the active scheduler when the status has changed.

     *

     * @since S60 v3.2

     */

    void RunL();

    /**

     * From CActive

     * Called by the active scheduler when RunL() leaves, aError contains the leave code.

     * 

     * @since S60 5.0

     */

    int RunError(TInt aError);

private: // data

    /**

     * The UID that identifies the setting category.

     */

    TUid iUid;

    /**

     * ID for BT power state in the central repository

     */

    TUint32 iId;

    /**

     * Central repository key type

     */

    TCenRepKeyType iKeyType;

    /**

     * Reference to the observer.

     */

    MLocodBearerPluginObserver& iHandler;

    /**

     * Session with the central repository.

     * Own.

     */

    CRepository* iSession;

    };

#endif  // __BTPLUGINNOTIFIER_H__