/*

* Copyright (c) 1997-2009 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: 

*

*/

#include <cntdb.h>

EXPORT_C TContactIter::TContactIter(CContactDatabase &aDatabase) : iDatabase(aDatabase)

/** Constructs the object with a contact database.

@param aDatabase The contact database over which to iterate. */

	{

	Reset();

	}

EXPORT_C void TContactIter::Reset()

/** Resets the iterator to its initialised state, so that a subsequent call to 

NextL() goes to the first item. */

	{

	iCursorId=KNullContactId;

	}

EXPORT_C TContactItemId TContactIter::FirstL()

/** Moves to the first contact item in the database.

@return The ID of the first contact item. */

	{

	if (iDatabase.SortedItemsL()->Count()==0)

		iCursorId=KNullContactId;

	else

		GotoIndexL(0);

	return iCursorId;

	}

EXPORT_C TContactItemId TContactIter::NextL()

/** Moves to the next contact item in the database. 

On a newly initialised TContactIter, this function moves to the first item.

@return The ID of the next contact item. Has a value of KNullContactId if 

there are no more items. */

	{

	TInt pos=0;

	if (iCursorId!=KNullContactId)

		pos=iDatabase.ContactPosL(iCursorId)+1;

	if (pos==iDatabase.SortedItemsL()->Count())

		iCursorId=KNullContactId;

	else

		GotoIndexL(pos);

	return iCursorId;

	}

EXPORT_C TContactItemId TContactIter::PreviousL()

/** Moves to the previous contact item in the database.

Note: you must not call this function on a newly initialised database, otherwise 

the function raises a panic.

@return The ID of the previous contact item. Has a value of KNullContactId 

if there is no previous item. */

	{

	TInt pos=iDatabase.ContactPosL(iCursorId);

	if (pos==0)

		return KNullContactId;

	GotoIndexL(--pos);

	return iCursorId;

	}

EXPORT_C TContactItemId TContactIter::LastL()

/** Moves to the last contact item in the database.

@return The ID of the last contact item. */

	{

	GotoIndexL(iDatabase.SortedItemsL()->Count()-1);

	return iCursorId;

	}

EXPORT_C void TContactIter::GotoL(TContactItemId aContactId)

/** Moves to the specified contact item.

@param aContactId A contact item ID. Must not have a value of KNullContactId, 

or the function raises a panic. */

	{

	User::LeaveIfError(iDatabase.DoGotoL(aContactId));

	iCursorId=aContactId;

	}

void TContactIter::GotoIndexL(TInt aPos)

	{

	GotoL((*iDatabase.SortedItemsL())[aPos]);

	}