// 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 REMCONNOWPLAYINGTARGETBASE_H

#define REMCONNOWPLAYINGTARGETBASE_H

#include <e32base.h>

#include <remcon/remconinterfacebase.h>

#include <remcon/remconinterfaceif.h>

#include <remconmediabrowsetypes.h>

class CRemConInterfaceSelector;

class MRemConDatabaseAwareNowPlayingTargetObserver;

class MRemConDatabaseUnawareNowPlayingTargetObserver;

class TRemConMessageQueue;

/**

A parent class for CRemConDatabaseAwareNowPlayingTarget and 

CRemConDatabaseUnawareNowPlayingTarget.

This class is not intended for instantiation. Clients should instead use the

appropriate derived class - either CRemConDatabaseAwareNowPlayingTarget or

CRemConDatabaseUnawareNowPlayingTarget.

This class is only to be used by classes currently derived from it.

@see CRemConDatabaseAwareNowPlayingTarget

@see CRemConDatabaseUnawareNowPlayingTarget

*/

NONSHARABLE_CLASS(CRemConNowPlayingTargetBase) : public CRemConInterfaceBase,

	                                             public MRemConInterfaceIf2

	{

public:

	IMPORT_C void PlayItemResponse(TInt aErr);

	IMPORT_C void AddToNowPlayingResponse(TInt aErr);

	IMPORT_C void NowPlayingContentChanged();

protected:

	IMPORT_C virtual ~CRemConNowPlayingTargetBase();

	CRemConNowPlayingTargetBase(CRemConInterfaceSelector& aInterfaceSelector,

			MRemConDatabaseAwareNowPlayingTargetObserver& aObserver);

	CRemConNowPlayingTargetBase(CRemConInterfaceSelector& aInterfaceSelector,

			MRemConDatabaseUnawareNowPlayingTargetObserver& aObserver);

	virtual void BaseConstructL();

private: //From CRemConInterfaceBase

	TAny* GetInterfaceIf(TUid aUid);

private: //From MRemConInterfaceIf2

	void MrcibNewMessage(TUint aOperationId,

			const TDesC8& aData,

			TRemConMessageSubType aMsgSubType);

private: //Utility functions

	void SendResponse(TUint8 aStatus, TUint aOperationId);

	void SendError(TInt aError, TUint aOperationId);	

	void SendNotificationResponse(TRemConMessageSubType aMsgSubType);

	void ProcessGetStatus();

	void ProcessGetStatusAndBeginObserving();	

	void ProcessPlayItem(const TDesC8& aData);

	void ProcessAddToNowPlaying(const TDesC8& aData);

	TBool ProcessNowPlaying(const TDesC8& aData,

			TUint aOperationId,

			TUint64& aItem, 

			TRemConFolderScope& aScope, 

			TUint16& aMediaLibraryStateCookie);

	static TInt NextMessageCb(TAny* aThis);

	void DoNextMessage();

	void AddToOperationQueue(TInt aOperationId, const TDesC8& aData);

private: //Unowned

	MRemConDatabaseAwareNowPlayingTargetObserver*	iDaObserver;

	MRemConDatabaseUnawareNowPlayingTargetObserver*	iDuObserver;

	CRemConInterfaceSelector&                   	iInterfaceSelector;

private: //Owned

	TBool                                       iNotificationPending;

	RBuf8                                       iOutBuf;

    TBool                                       iInProgress;

    TRemConMessageQueue*                         iMsgQueue;

    CAsyncCallBack*                             iNextMessageCallBack;

	};

#endif //REMCONNOWPLAYINGTARGETBASE_H