// Copyright (c) 2006-2009 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:

//

#ifndef PBAPPBHANDLECACHE_H

#define PBAPPBHANDLECACHE_H

#include <e32std.h>

#include <badesca.h>

#include <cntdef.h>

#include <cntdbobs.h>

//constants

const TInt KOwnCardHandle = 0;

//forward declarations

class CContactDatabase;

class CContactChangeNotifier;

class MPbHandleCacheObserver

	{

public:

	virtual void HandleCacheChanged()=0;

	};

class TPbHandleAndId

	{

public:

	inline TPbHandleAndId(TInt aHandle, TContactItemId aContactId) : iHandle(aHandle), iContactId(aContactId) {};

public:

	TInt iHandle;

	TContactItemId iContactId;

	};

class CPbapPbHandleCache : public CBase, public MContactDbObserver

	{

public:

	static CPbapPbHandleCache* NewL(CContactDatabase& aDatabase, MPbHandleCacheObserver& aObserver);

	~CPbapPbHandleCache();

public:

	TInt HandleAtL(TUint aIndex) const;

	TContactItemId ContactIdAtL(TUint aIndex) const;

	TInt FindHandle(TInt aHandle) const;

	TInt FindContactId(TContactItemId aContactId) const;	

	inline TInt Count() const;	

public:

	static TInt CompareHandles(const TPbHandleAndId& aFirst, const TPbHandleAndId& aSecond);

	static TBool MatchContactIds(const TPbHandleAndId& aFirst, const TPbHandleAndId& aSecond);

private:

	CPbapPbHandleCache(CContactDatabase& aDatabase, MPbHandleCacheObserver& aObserver);

	void ConstructL();

	void CreateHandleListL();

	void HandleContactAddedL(TContactItemId aContactId);

	void HandleContactDeleted(TContactItemId aContactId);

	void HandleOwnCardChangedL();

	void HandleOwnCardDeleted();

	TInt NextAvailableHandleL() const;

private: 

	//from MContactDbObserver	

	void HandleDatabaseEventL(TContactDbObserverEvent aEvent);

private:

	CContactDatabase& iDatabase;

	MPbHandleCacheObserver& iObserver;

	CContactChangeNotifier* iChangeNotifier;

	RArray<TPbHandleAndId> iHandleList;

	};

inline TInt CPbapPbHandleCache::Count() const

	{

	return iHandleList.Count();

	}

#endif // PBAPPBHANDLECACHE_H