/*

* Copyright (c) 2006 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: 

*     Class for observing free disk space and if disk space goes under critical

*     level this cancels itself.

*

*/

// INCLUDE FILES

#include <e32base.h>                            // Basic Symbian Includes

#include <MuiuMsvUiServiceUtilities.h>          // Muiu Utilities

#include <ImumInternalApi.h>        // CImumInternalApi

#include "ImumDiskSpaceObserverOperation.h"

#include "ImumDiskSpaceObserver.h"              // CImumDiskSpaceObserver

#include "ImumMtmLogging.h"

// CONSTANTS

const TUint KImumCriticalThreshold = 131072;

const TUint KImumSafetyMargin = 204800;

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

// CImumDiskSpaceObserverOperation

// C++ default constructor can NOT contain any code, that

// might leave.

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

CImumDiskSpaceObserverOperation::CImumDiskSpaceObserverOperation(

    CImumInternalApi& aMailboxApi,

    TInt aPriority,

    TRequestStatus& aObserverRequestStatus,

    MMsvProgressReporter& aReporter)

    :

    CImumOnlineOperation(

        aMailboxApi,

        aPriority,

        aObserverRequestStatus,

        aReporter)

    {

    IMUM_CONTEXT( CImumDiskSpaceObserverOperation::CImumDiskSpaceObserverOperation, 0, KImumMtmLog );

    IMUM_IN();

    IMUM_OUT();

    }

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

// CImumDiskSpaceObserverOperation::BaseConstructL()

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

void CImumDiskSpaceObserverOperation::BaseConstructL(TUid aMtmType)

    {

    IMUM_CONTEXT( CImumDiskSpaceObserverOperation::BaseConstructL, 0, KImumMtmLog );

    IMUM_IN();

    iDiskObserver = CImumDiskSpaceObserver::NewL(

        *this, iMsvSession.FileSession() );

    // Create own instance of API because ImumDiskSpaceObserver outlives

    // the owner of iMailboxApi reference in ImumOnlineOperation

    iEmailApi = CreateEmailApiL();

    CImumOnlineOperation::BaseConstructL( aMtmType );

    IMUM_OUT();

    }

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

// CImumDiskSpaceObserverOperation::~CImumDiskSpaceObserverOperation()

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

CImumDiskSpaceObserverOperation::~CImumDiskSpaceObserverOperation()

    {

    IMUM_CONTEXT( CImumDiskSpaceObserverOperation::~CImumDiskSpaceObserverOperation, 0, KImumMtmLog );

    IMUM_IN();

    delete iEmailApi;

    delete iDiskObserver;

    iDiskObserver = NULL;

    IMUM_OUT();

    }

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

// CImumDiskSpaceObserverOperation::DoCancel()

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

//

void CImumDiskSpaceObserverOperation::DoCancel()

    {

    IMUM_CONTEXT( CImumDiskSpaceObserverOperation::DoCancel, 0, KImumMtmLog );

    IMUM_IN();

    iDiskObserver->Cancel();

    CImumOnlineOperation::DoCancel();

    IMUM_OUT();

    }

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

// CImumDiskSpaceObserverOperation::DoDiskSpaceCheckL()

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

//

TInt CImumDiskSpaceObserverOperation::DoDiskSpaceCheckL()

    {

    IMUM_CONTEXT( CImumDiskSpaceObserverOperation::DoDiskSpaceCheckL, 0, KImumMtmLog );

    IMUM_IN();

    // Make sure we are operating in safe levels

    if( !MsvUiServiceUtilities::DiskSpaceBelowCriticalLevelWithOverheadL(

    	iEmailApi->MsvSession(), 0, KImumSafetyMargin ) )

        {

        // Get current drive

        TInt currentDrive = iEmailApi->MsvSession().CurrentDriveL();

        TInt64 currentLimit = KImumCriticalThreshold + KImumSafetyMargin;

        // Enough space, issue new request

        iDiskObserver->Cancel();

        iDiskObserver->NotifyDiskSpace( currentLimit, currentDrive );

        IMUM_OUT();

        return KErrNone;

        }

    IMUM_OUT();

    // Disk full for operation, indicate with error

    return KErrDiskFull;

    }

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

// CImumDiskSpaceObserverOperation::HandleDiskSpaceEvent()

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

//

void CImumDiskSpaceObserverOperation::HandleDiskSpaceEvent()

    {

    IMUM_CONTEXT( CImumDiskSpaceObserverOperation::HandleDiskSpaceEvent, 0, KImumMtmLog );

    IMUM_IN();

    Cancel();

    IMUM_OUT();

    }

//  End of File