/*

* Copyright (c) 2004 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 "drivewatcher.h"

#include "SWInstDebug.h"

namespace Swi

{

// CDriveWatcher

_LIT(KNotificationDirectory,"mediachange\\");

/*static*/ CDriveWatcher* CDriveWatcher::NewL(RFs& aFs, TInt aDrive, 

												MDriveObserver& aObserver,

							 					TInt aPriority)

	{

	CDriveWatcher* self=NewLC(aFs, aDrive, aObserver, aPriority);

	CleanupStack::Pop(self);

	return self;

	}

/*static*/ CDriveWatcher* CDriveWatcher::NewLC(RFs& aFs, TInt aDrive, 

												MDriveObserver& aObserver,

							 					TInt aPriority)

	{

	CDriveWatcher* self=new(ELeave) CDriveWatcher(aFs, aDrive, aObserver, aPriority);

	CleanupStack::PushL(self);

	self->ConstructL();

	return self;	

	}

CDriveWatcher::~CDriveWatcher()

	{

	Cancel();

	}

CDriveWatcher::CDriveWatcher(RFs& aFs, TInt aDrive, MDriveObserver& aObserver,

							 TInt aPriority)

	: CActive(aPriority), iFs(aFs), iDrive(aDrive), iObserver(aObserver)

	{

	CActiveScheduler::Add(this);

	}

void CDriveWatcher::ConstructL()

	{

	// Notify observer of media change since we're beginning from an unknown state

	NotifyMediaChange();

	// Start watching for changes

	WaitForChangeL();

	}

void CDriveWatcher::DoCancel()

	{

	iFs.NotifyChangeCancel(iStatus);

	}

TBool CDriveWatcher::IsMediaPresentL()

	{

        FLOG_1( _L("Daemon: Checking media presence for drive %d"), iDrive );

	TVolumeInfo volumeInfo;

	TInt err=iFs.Volume(volumeInfo, iDrive);

	switch (err)

		{

		case KErrNotReady: // No Media present

			{

			return EFalse;	

			}

		case KErrNone: // Media Present

			{

			return ETrue;

			}

		}

	User::Leave(err);	

	return ETrue;	// Will never get here.

	}

void CDriveWatcher::NotifyMediaChange()

	{

        FLOG( _L("Daemon: NotifyMediaChange") );        

	// Unsuccessful media change is not fatal, so handle here

	TRAPD(err,iObserver.MediaChangeL(iDrive, IsMediaPresentL() ? MDriveObserver::EMediaInserted : MDriveObserver::EMediaRemoved));

	if (err != KErrNone)

		{

                FLOG_1(_L("Daemon: MDriveObserver::MediaChangeL left while processing media notification %d"),err);

		}              

	}

void CDriveWatcher::RunL()

	{

	NotifyMediaChange();

	WaitForChangeL();

	}

void CDriveWatcher::WaitForChangeL()

	{

	TChar drive;

	User::LeaveIfError(iFs.DriveToChar(iDrive, drive));

	TUint driveChar(drive); // Can't pass TChar to Format().

	TPath notificationPath;

	TPath privatePath;

	_LIT(KNotificationPathFormat,"%c:%S%S");

	User::LeaveIfError(iFs.PrivatePath(privatePath));

	notificationPath.Format(KNotificationPathFormat, driveChar, &privatePath, &KNotificationDirectory);	

	iFs.NotifyChange(ENotifyEntry, iStatus, notificationPath);

	SetActive();

	}

}