// Copyright (c) 2002-2009 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 __LOGSERVVIEWCHANGEMANAGER_H__

#define __LOGSERVVIEWCHANGEMANAGER_H__

#include <logcli.h>

#include "LogChangeDefinition.h"

#include "LogCliServShared.h"

#include "LogServBackupObserver.h"

#include "LogServDatabaseChangeObserver.h"

// Classes referenced

class MLogServDatabaseChangeInterface;

/////////////////////////////////////////////////////////////////////////////////////////

// -----> CLogServViewBase (header)

/////////////////////////////////////////////////////////////////////////////////////////

/**

@internalComponent

*/

class CLogServViewChangeManager : public CBase

	{

public:

	static CLogServViewChangeManager* NewL(MLogServDatabaseChangeInterface& aChangeInterface);

	~CLogServViewChangeManager();

private:

	CLogServViewChangeManager(MLogServDatabaseChangeInterface& aChangeInterface);

	void ConstructL();

public: // CHANGE TRANSACTION

	/**

	 *

	 */

	void ChangeTransactionPrepare();

	/**

	 *

	 */

	void ChangeTransactionSubmitL(TLogId aId, TLogDatabaseChangeType aType, TInt aViewIndex);

	/**

	 *

	 */

	void ChangeTransactionCommitL();

public: // CHANGE DELIVERY

	/**

	 * Deliver the next available batch of changes. Panics if there

	 * aren't any.

	 */

	void DeliverChangesL(const RMessage2& aMessage);

public: // CHANGE REQUEST MANAGEMENT

	/**

	 * The client has requested change notifications

	 */

	void RequestChangeNotifications(const RMessage2& aMessage);

	/**

	 * The client has cancelled a previous change notification request

	 */

	void RequestChangeNotificationsCancel();

private:

	void NotifyClient();

	void CompleteClientChangeMessage(TInt aCompletionCode);

private:

	MLogServDatabaseChangeInterface& iChangeInterface;

	/**

	 * Completed when the view contents change

	 */

	RMessagePtr2 iClientSideChangeMessage;

	/**

	 * A buffer which contain the list of changed items

	 * for the current change transaction

	 */

	CLogChangeDefinition* iTransientChangeDefinition;

	/**

	 * All the change 'packages' which are outstanding for this client

	 */

	RPointerArray<CBufBase> iPendingChanges;

	};

#endif