// Copyright (c) 2008-2009 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:
//



/**
 @file
 @publishedAll
 @released
*/

#ifndef REMCONDATABASEAWARENOWPLAYINGTARGETOBSERVER_H
#define REMCONDATABASEAWARENOWPLAYINGTARGETOBSERVER_H

#include <remconmediabrowsetypes.h>

/**
It is intended for the client which is database aware.
Clients must implement this interface in order to instantiate objects of type 
CRemConDatabaseAwareNowPlayingTarget. This interface passes incoming commands 
from RemCon to the client. 

@see CRemConDatabaseAwareNowPlayingTarget
*/
NONSHARABLE_CLASS(MRemConDatabaseAwareNowPlayingTargetObserver) 
	{
public:
	/**
	Requests to play an item.
	
	@param aItem The item requested to play. 
	     - If it does not refer to any valid item, the client must call 
	       CRemConNowPlayingTargetBase::PlayItemResponse() 
	       with the error KErrInvalidUid;	
	     - If it refers to a directory which can not be handled by this media 
	       player, the client must call 
	       CRemConNowPlayingTargetBase::PlayItemResponse() 
	       with the error KErrNowPlayingUidIsADirectory;
	     - If it is in use and can not be played, the client must call 
	       CRemConNowPlayingTargetBase::PlayItemResponse() 
	       with the error KErrNowPlayingMediaInUse;
	
	@param aScope The scope in which the item was requested to play. 
	
	@param aMediaLibraryStateCookie The cookie which the remote device 
	       believes refers to the current state of the media library. If this
	       does not match the current state according to the client then the 
	       client must call 
	       CRemConNowPlayingTargetBase::PlayItemResponse() 
	       with the error KErrInvalidMediaLibraryStateCookie.
	
    @see CRemConNowPlayingTargetBase::PlayItemResponse().
	*/
	virtual void MrcdanptoPlayItem(const TRemConItemUid& aItem, 
			TRemConFolderScope aScope, 
			TUint16 aMediaLibraryStateCookie) = 0;

	/**
	Requests to add an item to now playing list.
	
	@param aItem The item requested to play.
	     - If it does not refer to any valid item, the client must call 
	       CRemConNowPlayingTargetBase::AddToNowPlayingResponse() 
	       with the error KErrInvalidUid;
	     - If it refers to a directory which can not be handled by this media 
	       player, the client must call 
	       CRemConNowPlayingTargetBase::AddToNowPlayingResponse() 
	       with the error KErrNowPlayingUidIsADirectory;
	     - If it is in use and can not be added to now playing list, the 
	       client must call 
	       CRemConNowPlayingTargetBase::AddToNowPlayingResponse() 
	       with the error KErrNowPlayingMediaInUse;
	
	@param aScope The scope in which the item was requested to play. 
	
	@param aMediaLibraryStateCookie The cookie which the remote device 
	       believes refers to the current state of the media library. If this 
	       does not match the current state according to the client then the 
	       client must call 
	       CRemConNowPlayingTargetBase::PlayItemResponse()
	       with the error KErrInvalidMediaLibraryStateCookie.
	
    @see CRemConNowPlayingTargetBase::AddToNowPlayingResponse().
	*/
	virtual void MrcdanptoAddToNowPlaying(const TRemConItemUid& aItem, 
			TRemConFolderScope aScope, 
			TUint16 aMediaLibraryStateCookie) = 0;
	};


#endif //REMCONDATABASEAWARENOWPLAYINGTARGETOBSERVER_H