/*

* 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:  Interface class to notify database changes to SongHistoryView

*

*/

#ifndef IR_SONGHISTORYUINOTIFYHANDLER

#define IR_SONGHISTORYUINOTIFYHANDLER

#include <e32cmn.h>

/**

* Observer interface for CIRSongHistoryView.

* Notifies the view when new data is received.

*/

NONSHARABLE_CLASS(MSongHistoryUINotifyHandler)

    {

		public:

			/**

			* Invoked from CIRSongHistoryDbEng when new entry is added to the database.

			* @param    aSongName

			* @param    aArtistName

			* @param    aChannelName

			* Parameters yet to be decided.

			*/

				virtual void NextSongReceivedL( const TDesC& aSongName, const TDesC& aArtistName,

							 const TDesC& aChannelName, const TDesC& aChannelUrl ) = 0;

				virtual void ChannelChangedL( const TDesC& aSongName, const TDesC& aArtistName,

						 const TDesC& aChannelName, const TDesC& aChannelUrl ) = 0;

			/**

			* Invoked from CIRSongHistoryDbEng when new entry is added to the database which *would exceed 30 entries.

			* @param    aSongName

			* @param    aArtistName

			* @param    aChannelName

			*/

				virtual TInt RemoveSongEntry( const TDesC& aSongName, const TDesC& aArtistName,

						const TDesC& aChannelName, const TDesC& aChannelUrl ) = 0;

				virtual TInt RemoveChannelEntry( const TDesC& aSongName, const TDesC& aArtistName,

							const TDesC& aChannelName, const TDesC& aChannelUrl ) = 0;

			/**

			* Invoked when an error occurred while notifying to UI.

			* @param    aError      The error code.

			*/

				virtual void NotifyDataChangeToUIError( TInt aError ) = 0;

    };

#endif //IR_SONGHISTORYUINOTIFYHANDLER