// 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:

//

#include "msvsearchsortdeltacache.h"

#include "MSVPANIC.H"

CMsvSearchSortDeltaCache* CMsvSearchSortDeltaCache::iMsvSearchSortDeltaCache =NULL;

/**

* CMsvSearchSortDeltaCache()

* 

*/

CMsvSearchSortDeltaCache::CMsvSearchSortDeltaCache()

	{

	iNewEntry.Reset();

	iUpdateEntry.Reset();

	iDeleteEntry.Reset();

	}

/**

* ~CMsvSearchSortDeltaCache()

*

*/

CMsvSearchSortDeltaCache::~CMsvSearchSortDeltaCache() 

	{

	iDeleteEntry.Close();

	iNewEntry.Close();

	iUpdateEntry.Close();

	iMsvSearchSortDeltaCache = NULL;

	}

 /**

 * Instance()

 *

 * The function returns already created instance of

 * this class to the caller. To create a new instance

 * the caller should call CreateL(). If an instance of

 * this object does not already exists, the function 

 * throws a panic EMsvFreePoolNotCreated in DEBUG mode.

 */ 

CMsvSearchSortDeltaCache* CMsvSearchSortDeltaCache::Instance()

	{

	__ASSERT_DEBUG(iMsvSearchSortDeltaCache!=NULL , PanicServer(EMsvSearchSortDeltaCacheNotCreated));

	return iMsvSearchSortDeltaCache;

	}

/**

 * CreateDeltaCacheL()

 *

 * The only way to create an object of this class.

 * The function ensures that only one instance of

 * the object is created. This is a static interface.

 * The function is made private to ensure that only

 * friend function can create instance of this class.

 */ 

CMsvSearchSortDeltaCache* CMsvSearchSortDeltaCache::CreateDeltaCacheL()

	{

	CMsvSearchSortDeltaCache* self = new (ELeave) CMsvSearchSortDeltaCache();

	//Push object in to cleanup stack so that it 

	// will be handles properly incase of a leave.

	CleanupStack::PushL(self);

	self->ConstructL();

	//Pop from cleanupstack

	CleanupStack::Pop(self);

	iMsvSearchSortDeltaCache = self;

	return self;

	}

/**

 * ConstructL()

 *

 * The function is called from InstanceL() and used to

 * initialize the instance of this class. It firsts reads

 * cache configuration information from msgcache.ini file

 * and stores them into member variable. It then allocates

 * creates initial set of entries as described in conf file. 

 */

void CMsvSearchSortDeltaCache::ConstructL()

	{

	}

/**

* EntryInDeltaCache()

* Add three different type (New, Update, Delete) of entry  in Delta Cache.

* @param :aID :a TMsvId ;aType = a TMsgType

* @return :TInt

*/

void CMsvSearchSortDeltaCache::EntryInDeltaCache(TMsvId aID,TMsgType aType)

	{

	if(aType == ENewMsg ) //New Msg Entry

		{

		iMsvSearchSortDeltaCache->iNewEntry.Append(aID);

		iMsvSearchSortDeltaCache->iDeltaCacheDirtyFlag = ETrue;

		}

	// This conditional statement is required to check if any msg updation is going  on while doing search or not.

	// And if any TMsvId  is  alreday added it should not add it again.

	else if(aType == EUpdatedMsg && !iIsHeaderSearchEnabled) //Updated msg Entry

			{

			//check if we already have aID in iNewEntry array list.

			TInt foundPos = iMsvSearchSortDeltaCache->iNewEntry.Find(aID);

			if( foundPos < 0 &&

				iUpdateEntry.Find(aID) == KErrNotFound )

				{

				iMsvSearchSortDeltaCache->iUpdateEntry.Append(aID);

				iMsvSearchSortDeltaCache->iDeltaCacheDirtyFlag = ETrue;

				}

			}

	else if(aType == EDeletedMsg) //Deleted msg Entry.

		{

		iMsvSearchSortDeltaCache->iDeleteEntry.Append(aID);

		iMsvSearchSortDeltaCache->iDeltaCacheDirtyFlag = ETrue;

		}

	}