// Copyright (c) 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: bifchangeobserver.h

// 

// Author	

// Date		 

//

/**

 * @file 

 * Callback interface implementation for BIF files changes.

 *

 * @publishedPartner

 * @released

 */

#ifndef __BIFCHANGEOBSERVER_H__

#define __BIFCHANGEOBSERVER_H__

class CBIODatabase;

/** Callback interface implemented by classes to receive notifications of BIF files 

changes from CBifChangeObserver. 

@publishedPartner

@released

*/

class MBifChangeObserver 

	{

public:

	/** BIF change events. */

	enum TBifChangeEvent

		{

		/** Unknown change. */

		EBifChangeUnknown = 0,

		/** BIF added. */

		EBifAdded,

		/** BIF deleted. */

		EBifDeleted,

		/** BIF changed. */

		EBifChanged

		};

public: 

	/** Called when a BIF change occurs.

	@param aEvent Change event type

	@param aBioID BIO message type of changed BIF */

	virtual void HandleBifChangeL(TBifChangeEvent aEvent, TUid aBioID)=0;

	};

/** Active object that watches for changes made to the installed BIF files. 

@publishedPartner

@released

*/

class CBifChangeObserver : public CActive

	{

public: 

	IMPORT_C static CBifChangeObserver* NewL(MBifChangeObserver& aObserver, RFs& aFs);

	IMPORT_C void Start();

	~CBifChangeObserver();

	static void CleanupBifArray(TAny* aBifArray);

private:

	// from CActive

	virtual void RunL();

	virtual void DoCancel();

private:

	CBifChangeObserver(MBifChangeObserver& aObserver, RFs& aFs);

	void ConstructL();

	void NotifyObserverL();

	void WaitForFileNotification();

	void DoRunL();

	void CopyEntriesL(const CDir& aDir, CArrayFixFlat<TEntry>& aEntries);

	TBool CompareReaders(const CBioInfoFileReader& aReader1, const CBioInfoFileReader& aReader2) const;

	TInt FindEntry(const CBifEntry& aBifEntry, const RPointerArray<CBifEntry>& aEntries, TInt& aIndex) const;

private:

	MBifChangeObserver&	iChangeObserver;

	RFs&			iFs;

	RPointerArray<CBifEntry> iEntries;

	CBIODatabase*	iBioDB;

	RTimer	iTimer;

	TInt iRetryCount;

	};

#endif // __BIFCHANGEOBSERVER_H__