/*

 * Copyright (c) 2008 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:  ?Description

 *

 */

// INCLUDE FILES

#include <f32file.h>

#include <s32file.h>

#include <sysutil.h>

#include "casrvmmchistory.h"

// CONSTANTS

LOCAL_D const TInt KCaMmcHistoryLength = 2;

// ==================== MEMBER FUNCTIONS ====================

// ---------------------------------------------------------

// ---------------------------------------------------------

//

EXPORT_C void CCaSrvMmcHistory::LoadL( RFs& aFs, const TDesC& aFname )

    {

    iMmcList.Reset();

    TUint att;

    if( KErrNotFound != aFs.Att( aFname, att ) )

        {

        RFileReadStream stream;

        CleanupClosePushL( stream );

        User::LeaveIfError( stream.Open( aFs, aFname, EFileStream

                | EFileShareReadersOnly ) );

        TInt len = Min( KCaMmcHistoryLength, stream.ReadInt32L() );

        while( len-- )

            {

            iMmcList.AppendL( stream.ReadUint32L() );

            }

        CleanupStack::PopAndDestroy( &stream );

        }

    }

// ---------------------------------------------------------

// CMenuSrvMmcHistory::SaveL

// Method do not work if there is no free space on C drive.

// ---------------------------------------------------------

//

EXPORT_C void CCaSrvMmcHistory::SaveL( RFs& aFs, const TDesC& aFname )

    {

    if( SysUtil::DiskSpaceBelowCriticalLevelL( &aFs, 0, EDriveC ) )

        {

        return;

        }

    RFileWriteStream stream;

    CleanupClosePushL( stream );

    User::LeaveIfError( stream.Replace( aFs, aFname, EFileStream

            | EFileShareExclusive ) );

    stream.WriteInt32L( iMmcList.Count() );

    for( TInt i = 0; i < iMmcList.Count(); i++ )

        {

        stream.WriteUint32L( iMmcList[i] );

        }

    CleanupStack::PopAndDestroy( &stream );

    }

// ---------------------------------------------------------

// CMenuSrvMmcHistory::InsertL

// ---------------------------------------------------------

//

EXPORT_C void CCaSrvMmcHistory::InsertL( TUint aMmc )

    {

    TInt i = iMmcList.Find( aMmc );

    switch( i )

        {

        case 0:

            {

            // aMmc is already first, do nothing.

            break;

            }

        case KErrNotFound:

            {

            // aMmc is not in the list. Insert as first.

            if( iMmcList.Count() == KCaMmcHistoryLength )

                {

                // List already full - remove last item to make space.

                iMmcList.Remove( KCaMmcHistoryLength - 1 );

                }

            iMmcList.InsertL( aMmc, 0 );

            break;

            }

        default:

            {

            // aMmc is in the list, but not first. Move to first place.

            iMmcList.Remove( i );

            iMmcList.InsertL( aMmc, 0 );

            break;

            }

        }

    }

// ---------------------------------------------------------

// CMenuSrvMmcHistory::Find

// ---------------------------------------------------------

//

EXPORT_C TInt CCaSrvMmcHistory::Find( TUint aMmc )

    {

    return iMmcList.Find( aMmc );

    }

//  End of File