/*

* Copyright (c) 2006-2007 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:  ?Description

*

*/

#ifndef IRACTIVEIDLEENG_H

#define IRACTIVEIDLEENG_H

#include "iractiveidleengpubsubnotifyhandler.h"

class CIRActiveIdleEngPubSub;

class MIRActiveIdleEngNotifyHandler;

/**

* Engine component for Internet Radio Active Idle plugin.

*

* This class is responsible for listening to relevant P&S keys and notifying the UI code whenever the listened keys change.

* The actual listening is done by multiple CIRActiveIdleStatusObserver objects.

*/

NONSHARABLE_CLASS(CIRActiveIdleEng) : public CBase, 

	public MIRActiveIdleEngPubSubNotifyHandler

    {

    public:

        /**

        * Static constructor.

        * @param    aObserver   The observer to be notified of the changes in the keys.

        * @return   The newly created CIRActiveIdleEng object.

        */

    IMPORT_C static CIRActiveIdleEng* NewL( 

    	MIRActiveIdleEngNotifyHandler& aObserver );

        /**

        * Destructor.

        */

        IMPORT_C ~CIRActiveIdleEng();

        /**

        * Construction finalizer.

        * Must be called after CIRActiveIdleEng::NewL. 

        */

        IMPORT_C void SecondConstructL();

    protected: // From MIRActiveIdleStatusObserver

        /**

    * Invoked when an error occurred while retrieving the new 

    * value of the key.

    * @param    aCategory   The category of the key that changed.

    * @param    aKey        The key that changed.

    * @param    aError      The error code.

        */

    void HandlePropertyChangeErrorL( const TUid& aCategory, TUint aKey, 

    	TInt aError );

        /**

    * Invoked when the listened key is changed.

    * @param    aCategory   The category of the key that changed.

    * @param    aKey        The key that changed.

    * @param    aText       The new value of the key.

        */

    void HandlePropertyChangeL( const TUid& aCategory, TUint aKey,

    	const TDesC8& aText );

        /**

    * Invoked when the listened key is changed.

    * @param    aCategory   The category of the key that changed.

    * @param    aKey        The key that changed.

    * @param    aValue      The new value of the key.

        */

    void HandlePropertyChangeL( const TUid& aCategory, TUint aKey, 

    	TInt aValue );

	private:

        /**

        * Constructor.

    * @param    aObserver   The observer to be notified of the changes 

    * in the keys.

        */

        CIRActiveIdleEng( MIRActiveIdleEngNotifyHandler& aObserver );

        /**

        * Second-phase constructor.

        */

        void ConstructL();        

    protected:

        /** The observer to be notified of the changes in the listened keys. */

        MIRActiveIdleEngNotifyHandler& iObserver;

        /** Array of status observers. */

        RPointerArray<CIRActiveIdleEngPubSub> iPropertyObserverArray;

        TInt		iVolume;

    };

#endif//IRACTIVEIDLEENG_H