// Copyright (c) 2007-2009 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

 @internalTechnology

*/

#ifndef MTPFILEENUMERATOR_H

#define MTPFILEENUMERATOR_H

#include <e32base.h>

#include <f32file.h>

#include "rmtpdpsingletons.h"

#include "mtpdebug.h"

#include "rmtpframework.h"

class MMTPDataProviderFramework;

class MMTPDataProviderFramework;

class MMTPObjectMgr;

class MMTPEnumerationCallback;

class CMTPObjectMetaData;

class CMTPFSExclusionMgr;

/** 

Defines file enumerator.  Enumerates all files/directories under a specified path or storage

@internalTechnology

*/

class CMTPFSEnumerator : public CActive

    {

public:

    IMPORT_C static CMTPFSEnumerator* NewL(MMTPDataProviderFramework& aFramework, CMTPFSExclusionMgr& aExclusionMgr, MMTPEnumerationCallback& aCallback, TInt aProcessLimit);

    IMPORT_C ~CMTPFSEnumerator();

	IMPORT_C void StartL(TUint32 aStorageId, TBool aScanAll = EFalse);	

private:

	//from CActive

	void DoCancel();

	void RunL();

	TInt RunError(TInt aError);

private:

	CMTPFSEnumerator(MMTPDataProviderFramework& aFramework, CMTPFSExclusionMgr& aExclusionMgr, MMTPEnumerationCallback& aCallback, TInt aProcessLimit);

	void ConstructL();

	void ScanDirL();

	void ScanStorageL(TUint32 aStorageId);

	void ScanNextL();

	void ScanNextStorageL();

	void ScanNextSubdirL();

	void ProcessEntriesL();

	void AddEntryL(const TDesC& aPath, TUint32 &aHandle, TMTPFormatCode format, TUint32 aDPId, const TEntry& aEntry, TUint32 aStorageId, TUint32 aParentHandle);

	void NotifyObjectAddToDP(const TUint32 aHandle,const TUint DpId);

private:

    static  const TUint KMTPMaxFullFileName = 259;

    class TStackItem

        {

        public:

            TStackItem(const TDesC& aPath, const TUint32 aHandle):iPath(aPath), iHandle(aHandle)

                {

                }

        public:

            TBuf<KMTPMaxFullFileName> iPath;

            TUint32                   iHandle;

        };

private: 

	// Owned

	MMTPDataProviderFramework&  iFramework;

	CMTPFSExclusionMgr& 		iExclusionMgr;

	MMTPEnumerationCallback& 	iCallback;

	RMTPDpSingletons			iDpSingletons;

	TUint32 					iParentHandle;

	TBuf<KMTPMaxFullFileName>	iCurrentPath;

	RDir						iDir;

	TEntryArray					iEntries;

	TInt						iFirstUnprocessed;

	RArray<TStackItem>			iDirStack;

	RArray<TUint>				iStorages;

	TUint32						iStorageId;

	// How many entries should be processed in one go

	TInt 						iProcessLimit;

	CMTPObjectMetaData* 		iObject;

	TUint						iDpID;

	RMTPFramework               iSingletons;

	TBool                       iSkipCurrentStorage;

	TBool                       iScanAll;

	TBool                       iAllRootScaned;

	TUint                       iScanPos;

	TInt                        iObjectNeedToScan;

	/**

    FLOGGER debug trace member variable.

    */

    __FLOG_DECLARATION_MEMBER_MUTABLE;

    };

#endif // MTPFILEENUMERATOR_H