/*

* Copyright (c) 2008-2008 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:  Monitors the file system for changes in a file.

*

*/

#include <e32base.h>

#include <bautils.h>

#include <mpxlog.h>

#include "filemonitor.h"

#include "filemonitorobserver.h"

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

// Constructor

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

//

CFileMonitor::CFileMonitor( MFileMonitorObserver& aObserver)

        : CActive( EPriorityNormal ),

        iObserver( aObserver ),

        iFilePath( NULL )

    {

    }

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

// Second Phase Constructor

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

//

void CFileMonitor::ConstructL()

    {

    CActiveScheduler::Add( this );

    User::LeaveIfError( iFs.Connect() );

    }

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

// Two-phased constructor

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

//

CFileMonitor* CFileMonitor::NewL( MFileMonitorObserver& aObserver)

    {

    CFileMonitor* self = new( ELeave ) CFileMonitor( aObserver);

    CleanupStack::PushL( self );

    self->ConstructL();

    CleanupStack::Pop( self );

    return self;

    }

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

// Destructor

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

//

CFileMonitor::~CFileMonitor()

    {

    Cancel();

    iFs.Close();

    delete iFilePath;

    }

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

// Starts monitoring a particular file

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

//

void CFileMonitor::StartL(  const TDesC& aFile)

    {

    MPX_DEBUG1("CFileMonitor::Start <---");

    delete iFilePath;

    iFilePath = NULL;

    iFilePath = aFile.AllocL();

    TNotifyType notType = ENotifyAll;

    iFs.NotifyChange( notType, iStatus, *iFilePath );

    SetActive();

    MPX_DEBUG1("CFileMonitor::Start --->");

    }

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

// RunL callback

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

//

void CFileMonitor::RunL()

    {

    MPX_DEBUG1("CFileMonitor::RunL <---");

    if (!BaflUtils::FileExists(iFs, *iFilePath ))

        {

        iObserver.HandleFileRemovedL();

        MPX_DEBUG1("CFileMonitor::RunL - File was removed");

        }

    else

        {

        // Listen again

        TNotifyType notType(ENotifyAll);

        iFs.NotifyChange(notType, iStatus, *iFilePath);

        SetActive();

        MPX_DEBUG1("CFileMonitor::RunL - File exists");

        }

    MPX_DEBUG1("CFileMonitor::RunL --->");

    }

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

// Handle Cancelling

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

//

void CFileMonitor::DoCancel()

    {

    MPX_DEBUG1("CFileMonitor::DoCancel <---");

    // Stop monitoring

    iFs.NotifyChangeCancel();

    MPX_DEBUG1("CFileMonitor::DoCancel --->");

    }

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

// Handles a leave occurring in the request completion event handler RunL()

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

//

TInt CFileMonitor::RunError(TInt aError)

    {

    MPX_DEBUG2("CFileMonitor::RunError(%d)", aError );

    // Listen again

    TNotifyType notType(ENotifyAll);

    iFs.NotifyChange( notType, iStatus, *iFilePath );

    SetActive();

    return KErrNone;

    }