// 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:

// mw/remoteconn/mtpfws/mtpfw/dataproviders/dputility/inc/cmtpknowledgehandler.h

/**

 @file

 @internalComponent

 */

#ifndef __CMTPKNOWLEDGEHANDLER_H__

#define __CMTPKNOWLEDGEHANDLER_H__

#include <mtp/cmtptypeserviceproplist.h>

#include <mtp/mtpprotocolconstants.h>

#include "mtpdebug.h"

#include "mtpsvcdpconst.h"

#include "mmtpsvcobjecthandler.h"

class CMTPTypeFile;

class CRepository;

/** 

Controls access to the knowledge object.

@internalComponent

*/

class CMTPKnowledgeHandler : public CBase, public MMTPSvcObjectHandler

	{

public:

	// Basic function

	IMPORT_C static CMTPKnowledgeHandler* NewL(MMTPDataProviderFramework& aFramework, TUint16 aFormatCode, CRepository& aReposotry, const TDesC& aKwgSuid);

	IMPORT_C ~CMTPKnowledgeHandler();

	IMPORT_C void SetStorageId(TUint32 aStorageId);

	IMPORT_C void GetObjectSuidL(TDes& aSuid) const;

protected:

	// MMTPSvcObjectHandler

	TMTPResponseCode SendObjectInfoL(const CMTPTypeObjectInfo& aObjectInfo, TUint32& aParentHandle, TDes& aSuid);

	TMTPResponseCode GetObjectInfoL(const CMTPObjectMetaData& aObjectMetaData, CMTPTypeObjectInfo& aObjectInfo);

	TMTPResponseCode SendObjectPropListL(TUint64 aObjectSize, const CMTPTypeObjectPropList& aObjectPropList, TUint32& aParentHandle, TDes& aSuid);

	TMTPResponseCode SetObjectPropertyL(const TDesC& aSuid, const CMTPTypeObjectPropListElement& aElement, TMTPOperationCode aOperationCode);

	TMTPResponseCode GetObjectPropertyL(const CMTPObjectMetaData& aObjectMetaData, TUint16 aPropertyCode, CMTPTypeObjectPropList& aPropList);

	TMTPResponseCode DeleteObjectPropertyL(const CMTPObjectMetaData& aObjectMetaData, const TUint16 aPropertyCode);

	TMTPResponseCode GetBufferForSendObjectL(const CMTPObjectMetaData& aObjectMetaData, MMTPType** aBuffer);

	TMTPResponseCode GetObjectL(const CMTPObjectMetaData& aObjectMetaData, MMTPType** aBuffer);

	TMTPResponseCode DeleteObjectL(const CMTPObjectMetaData& aObjectMetaData);

	TMTPResponseCode GetObjectSizeL(const TDesC& aSuid, TUint64& aObjectSize);

	TMTPResponseCode GetAllObjectPropCodeByGroupL(TUint32 aGroupId, RArray<TUint32>& aPropCodes);

	void CommitL();

	void CommitForNewObjectL(TDes& aSuid);

	void RollBack();

	void ReleaseObjectBuffer();	

	enum TCacheStatus

		{

		EOK,

		EDirty,

		EDeleted

		};

	//key of central repository

	enum TMTPKnowledgeStoreKeyNum

		{

		ESize = 0x10001, 

		EDateModified = 0x10002,

		EName = 0x10003,

		ELastAuthorProxyID = 0x10004

		};

	TMTPResponseCode SetColumnType128Value(TMTPKnowledgeStoreKeyNum aColumnNum, TMTPTypeUint128& aNewData);

private:

	CMTPKnowledgeHandler(MMTPDataProviderFramework& aFramework,TUint16 aFormatCode, CRepository& aReposotry, const TDesC& aKwgSuid);

	void ConstructL();

	/**

	Get the value from the central repository

	@leave One of the system wide error codes, if repository get value fail

	*/

	void LoadKnowledgeObjPropertiesL();

	/**

	Cleanup Item operation for drop all knowledge properties

	*/

	static void DropCacheWrapper(TAny* aObject);

	void DropKnowledgeObjPropertiesCache();

	/**

	Helper for GetObjectInfo request handling

	*/

	void BuildObjectInfoL(CMTPTypeObjectInfo& aObjectInfo) const;

	/**

	Delete knowledge object properties and content

	@leave One of the system wide error codes, if repository set value fail

	*/

	void DeleteAllObjectPropertiesL();

private:

	MMTPDataProviderFramework&  iFramework;

	CRepository&                iRepository;

	TUint32                     iStorageID;

	TUint16                     iKnowledgeFormatCode;

	TUint64                     iKnowledgeObjectSize; 

	HBufC*                      iDateModified;

	HBufC*                      iName;

	TMTPTypeUint128             iLastAuthorProxyID;

	TCacheStatus                iCacheStatus;

	TCacheStatus                iCacheStatusFlag;

	TFileName                   iKnowObjFileName;

	TFileName                   iKnowObjSwpFileName;

	// Knowledge object content file

	CMTPTypeFile*               iKnowledgeObj;

	// Knowledge object swap file

	CMTPTypeFile*               iKnowledgeSwpBuffer;

	const TDesC&               iSuid;

	/**

	FLOGGER debug trace member variable.

	*/

	__FLOG_DECLARATION_MEMBER_MUTABLE;

	};

#endif // __CMTPKNOWLEDGEHANDLER_H__