// Copyright (c) 2008-2009 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 "ASSrvDSTChange.h"

#include "ASSrvAlarmQueue.h"

#include <e32property.h>

// These are copies of definitions in the tz server

// they must not change there

const TInt KDSTChangePropertyKey(0x10285B32);

CASSrvDSTChange* CASSrvDSTChange::NewL(CASSrvAlarmQueue& aASSrvAlarmQueue)

	{

	CASSrvDSTChange* self = new(ELeave) CASSrvDSTChange(aASSrvAlarmQueue);

	CleanupStack::PushL(self);

	self->ConstructL();

	CleanupStack::Pop(self);

	return self;

	}

CASSrvDSTChange::CASSrvDSTChange(CASSrvAlarmQueue& aASSrvAlarmQueue)

	:CActive(CActive::EPriorityStandard),

	iASSrvAlarmQueue(aASSrvAlarmQueue),

	iNextDSTChangeUTC(Time::NullTTime()),

	iNextUTCOffset(0),

	iPreviousDSTChangeUTC(Time::NullTTime()),

	iPreviousUTCOffset(0)

	{

	CActiveScheduler::Add(this);

	}

void CASSrvDSTChange::ConstructL()

	{

	TInt attachError = iDSTChangeProperty.Attach(KUidSystemCategory, KDSTChangePropertyKey);

	if (attachError == KErrNone)

		{

		// Only subscribe if there was no error.  There should only be an error if the property

		// has not yet been defined and there was no memory to create the property.  The behaviour

		// in this fail case will be for the alarm server to not be aware of any DST change events

		// that are scheduled.

		iDSTChangeProperty.Subscribe(iStatus);

		SetActive();

		UpdatePropertyValuesL();

		}

	}

CASSrvDSTChange::~CASSrvDSTChange()

	{

	Cancel();

	iDSTChangeProperty.Close();

	}

TTime CASSrvDSTChange::NextDSTChangeUTC() const

	{

	return iNextDSTChangeUTC;

	}

TTimeIntervalMinutes CASSrvDSTChange::NextUTCOffset() const

	{

	return iNextUTCOffset;

	}

TTime CASSrvDSTChange::PreviousDSTChangeUTC() const

	{

	return iPreviousDSTChangeUTC;

	}

TTimeIntervalMinutes CASSrvDSTChange::PreviousUTCOffset() const

	{

	return iPreviousUTCOffset;

	}

void CASSrvDSTChange::UpdatePropertyValuesL()

	{

	TPckgBuf<TNextDSTChange> fetchedDSTChangeBuf;

	TInt getError = iDSTChangeProperty.Get(fetchedDSTChangeBuf);

	if (getError == KErrNone)

		{

		iNextDSTChangeUTC = fetchedDSTChangeBuf().iNextDSTChangeUTC;

		iNextUTCOffset = fetchedDSTChangeBuf().iNextUTCOffset;

		if (fetchedDSTChangeBuf().iVersion >= 2)

			{

			iPreviousDSTChangeUTC = fetchedDSTChangeBuf().iPreviousDSTChangeUTC;

			iPreviousUTCOffset = fetchedDSTChangeBuf().iPreviousUTCOffset;

			}

		}

	}

void CASSrvDSTChange::RunL()

	{	

	if (iStatus.Int() == KErrNone)

		{

		// Subscribe again before handling the change

		iDSTChangeProperty.Subscribe(iStatus);

		SetActive();

		UpdatePropertyValuesL();

#ifdef SYMBIAN_SYSTEM_STATE_MANAGEMENT

		// Tell the alarm queue that it may need to reset the RTC

		iASSrvAlarmQueue.HandleNextDSTChangeEventL();

#endif

		}

	}

void CASSrvDSTChange::DoCancel()

	{

	iDSTChangeProperty.Cancel();

	}