/*

* Copyright (c) 2007 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 a folder in the file system for file changes

*

*/

#include <e32base.h>

#include <pathinfo.h>

#include <driveinfo.h>

#include <mpxlog.h>

#include "mpxfoldermonitor.h"

#include "mpxfileadditionobserver.h"

#include "mpxfoldermonitorobserver.h"

// CONSTANTS

_LIT( KMPXMusicPath, "\\Music\\");

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

// Constructor

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

//

CMPXFolderMonitor::CMPXFolderMonitor( MMPXFolderMonitorObserver& aObserver,

                                      RFs& aFs ) : CActive( EPriorityNormal ),

                                                   iObserver( aObserver ),

                                                   iFs( aFs )

    {

    CActiveScheduler::Add( this );

    }

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

// Second Phase Constructor

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

//

void CMPXFolderMonitor::ConstructL()

    {

    }

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

// Two-phased constructor

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

//

CMPXFolderMonitor* CMPXFolderMonitor::NewL( MMPXFolderMonitorObserver& aObserver,

                                            RFs& aFs )

    {

    CMPXFolderMonitor* self = new( ELeave ) CMPXFolderMonitor( aObserver, aFs );

    CleanupStack::PushL( self );

    self->ConstructL();

    CleanupStack::Pop( self );

    return self;

    }

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

// Destructor

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

//

CMPXFolderMonitor::~CMPXFolderMonitor()

    {

    Cancel();

    delete iFolderName;

    }

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

// Starts monitoring a particular drive

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

//

void CMPXFolderMonitor::StartL( TDriveNumber aDrive )

    {

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

    // What is the drive name?

    delete iFolderName;

    iFolderName = NULL;

    switch( aDrive )

        {

        case EDriveC:

            {

            // Use the default path for the phone memory

            iFolderName =

                PathInfo::PhoneMemoryRootPath().AllocL();

            break;

            }

        default:

            {

            // Ensure that the drive is available

            // Get the drive status

            TUint driveStatus(0);

            const TInt err = DriveInfo::GetDriveStatus(

                iFs, aDrive, driveStatus );

            if ( ( err == KErrNone ) &&

                (driveStatus & DriveInfo::EDriveUserVisible ) )

                {

                // Use the music path for the drive

                iFolderName = HBufC::NewL(KMaxFileName);

                TPtr folderPtr( iFolderName->Des() );

                User::LeaveIfError(

                    PathInfo::GetRootPath( folderPtr, aDrive ) );

                folderPtr.Append( KMPXMusicPath() );

                }

            else

                {

                TChar driveChar;

                User::LeaveIfError(

                    iFs.DriveToChar( aDrive, driveChar ) );

                MPX_DEBUG2("CMPXFolderMonitor::Start: Drive %c: not supported!",

                    (TUint)driveChar );

                User::Leave( KErrNotSupported );

                }

            break;

            }

        }

    MPX_DEBUG2("CMPXFolderMonitor::Start: Use %S path", iFolderName);

    // Start listening

    //

    TNotifyType notType = ENotifyFile;

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

    SetActive();

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

    }

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

// Start monitoring a particular folder

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

//

void CMPXFolderMonitor::StartL( const TDesC& aFolder )

    {

    MPX_DEBUG1("CMPXFolderMonitor::StartL <---");

    // Copy folder

    //

    delete iFolderName;

    iFolderName = NULL;

    iFolderName = aFolder.AllocL();

    // Start listening

    //

    TNotifyType notType = ENotifyFile;

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

    SetActive();

    MPX_DEBUG1("CMPXFolderMonitor::StartL --->");

    }

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

// RunL callback

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

//

void CMPXFolderMonitor::RunL()

    {

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

    // Tell the observer that this folder has changed

    // It should go and scan it for files?

    iObserver.HandleDirectoryChangedL( *iFolderName );

    // Listen again

    TNotifyType notType(ENotifyFile);

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

    SetActive();

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

    }

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

// Handle Cancelling

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

//

void CMPXFolderMonitor::DoCancel()

    {

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

    // Stop monitoring

    iFs.NotifyChangeCancel();

    }

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

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

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

//

TInt CMPXFolderMonitor::RunError(TInt aError)

    {

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

    (void)aError;

    // Listen again

    TNotifyType notType(ENotifyFile);

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

    SetActive();

    return KErrNone;

    }