// Copyright (c) 1998-2009 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:

// IMAP Folder indexing

// 

//

#include "fldindex.h"

#include "impspan.h"

// Illegal UID we use for marker

const TUint KIllegalUID	= 0xffffffff;

CImImap4IndexEntry::CImImap4IndexEntry()

	{

	// Default values

	iUid=0;

	iMsvId=-1;

	}

CImImap4IndexEntry::CImImap4IndexEntry(CImImap4IndexEntry& aFrom)

	{

	// Copy entry

	iUid=aFrom.iUid;

	iMsvId=aFrom.iMsvId;

	}

CImImap4IndexEntry& CImImap4IndexEntry::operator=(CImImap4IndexEntry& aFrom)

	{

	// Copy entry

	iUid=aFrom.iUid;

	iMsvId=aFrom.iMsvId;

	return(*this);

	}

CImImap4FolderIndex::CImImap4FolderIndex()

	{

	__DECLARE_NAME(_S("CImImap4FolderIndex"));

	}

CImImap4FolderIndex::~CImImap4FolderIndex()

	{

	// Dispose of index

	delete iIndex;

	}

void CImImap4FolderIndex::Reset()

	{

	// Dispose of index

	delete iIndex;

	iIndex=NULL;

	iSize=0;

	}

void CImImap4FolderIndex::SetSizeL(const TUint aEntries)

	{

	// Set number of entries

	if (!iIndex)

		{

		// Create new array (granularity 8 entries)

		iIndex=new (ELeave) CArrayFixFlat<CImImap4IndexEntry>(8);

		}

	// Alter size, filling unused entries with 0xffffffff

	CImImap4IndexEntry blank;

	blank.iUid=KIllegalUID;

	blank.iMsvId=0;

	iIndex->ResizeL(aEntries,blank);

	// Save new size

	iSize=aEntries;

	}

TInt CImImap4FolderIndex::Size()

	{

	// Return current size

	return(iSize);

	}

void CImImap4FolderIndex::SetUid(const TUint aMsgNr, const TUint aMsgUid)

	{

	__ASSERT_ALWAYS(aMsgNr<=TUint(iSize),gPanic(EMsgnrOutOfRange));

	// Is UID already set?

	if ((*iIndex)[aMsgNr-1].iUid!=KIllegalUID && (*iIndex)[aMsgNr-1].iUid!=aMsgUid)

		{

		// CHANGING a UID? No way!

		gPanic(ECantChangeUID);

		}

	// Set a UID for a message number

	(*iIndex)[aMsgNr-1].iUid=aMsgUid;

	}

void CImImap4FolderIndex::SetMsvId(const TUint aMsgNr, const TMsvId aMsvId)

	{

	__ASSERT_ALWAYS(aMsgNr<=TUint(iSize),gPanic(EMsgnrOutOfRange));

	// Is MsvId already set?

	if ((*iIndex)[aMsgNr-1].iMsvId!=0 && (*iIndex)[aMsgNr-1].iMsvId!=aMsvId)

		{

		// CHANGING a MsvId? No way!

		gPanic(ECantChangeMsvId);

		}

	// Set a MsvId for a message number

	(*iIndex)[aMsgNr-1].iMsvId=aMsvId;

	}

void CImImap4FolderIndex::Expunge(const TUint aMsgNr)

	{

	__ASSERT_ALWAYS(aMsgNr<=TUint(iSize),gPanic(EMsgnrOutOfRange));

	// Remove entry from index

	iIndex->Delete(aMsgNr-1);

	iSize--;

	}

TUint CImImap4FolderIndex::FindMsg(const TUint aMsgUid)

	{

	__ASSERT_ALWAYS(iSize>0,gPanic(EIndexEmpty));

	// Replace this with a binary search...

	TInt i=0;

	do

		{

		// UID match?

		if ((*iIndex)[i].iUid==aMsgUid)

			return(i+1);

		i++;

		}

	while(i<iSize);

	// Failure (0 not a legal message number)

	return(0);

	}

// Access entry directly

CImImap4IndexEntry& CImImap4FolderIndex::operator[] (const TInt aIndex)

	{

	return((*iIndex)[aIndex]);

	}

// Sort index by UID

void CImImap4FolderIndex::Sort()

	{

	// Sorting object

	TKeyArrayFix uidKey(_FOFF(CImImap4IndexEntry,iUid),ECmpTUint32);

	// Perform the sort

	iIndex->Sort(uidKey);

	}