// 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:

//

#ifndef __TZSYSTEMDATA_H__

#define __TZSYSTEMDATA_H__

#include <tzlocalizationdatatypes.h>

#include <tz.h>

#include <barsc.h>

#include <barsread.h>

#include <f32file.h>

/**

Reads Localized time zone information and city information from resource files

@internalTechnology

*/

class CTzSystemDataDb : public CBase

	{

		//enums

/**

Enum to get to the various resources in the resource files. These can be added

to the offset returned by RResourceFile::Offset() to get the relevant resource

ID

*/

	enum TTzResourceOffset

		{

/**

Offset of the RSS Signature, this is always the first resource, so the enum

starts at 1.

*/

		ETzRssSignature = 1,

/**

Offset of the first localized resource. In the time zones resource file, this

is the default cached zones resource, in the groups resource files, this is the

first group.

*/

		ETzFirstLocalizedResource,

/**

Offset of the first localized time zone resource. This simply allows the

default cached zones resource to be skipped over in the time zones resource

file.

*/

		ETzFirstTimeZoneResource

		};

public:

	CTzLocalizedTimeZoneRecord* ReadTimeZoneL(TInt aTimeZoneId);

		void ReadCitiesL(RPointerArray<CTzLocalizedCityRecord>& aCities, TInt aTimeZoneId);

		CTzLocalizedCityRecord* ReadDefaultCityL(TInt aTimeZoneId);

		CTzLocalizedTimeZoneRecord* ReadFrequentlyUsedZoneL(TInt aFrequentlyUsedZone);

		TInt ReadFrequentlyUsedZoneIdL(TInt aFrequentlyUsedZone);

		static CTzSystemDataDb* NewLC();

		~CTzSystemDataDb();

	private:

		void ConstructL();

		TInt FindTimeZoneResourceIdL(TInt aTimeZoneId);

		TInt LocalizedResourceIdL(const RResourceFile& aResourceFile, const TTzResourceOffset aOffset);

		TInt FirstTimeZoneResourceIdL();

		TInt CachedTimeZoneResourceIdL();

		void BufferResourceL(const RResourceFile& aResourceFile, TInt aResourceId);

		void ResetResourceBuffer();

		CTzLocalizedTimeZoneRecord* DoReadTimeZoneL(TInt aResourceId);

		CTzLocalizedTimeZoneRecord* CreateTimeZoneRecordFromResourceL(TInt aResourceId);

		void DoReadCitiesL(RPointerArray<CTzLocalizedCityRecord>& aCities, TInt aResourceId);

		void AddCityArrayFromResourceL(RPointerArray<CTzLocalizedCityRecord>& aCities, TInt aResourceId);

	private:

		RFs iFs;

		RResourceFile iTimeZoneResourceFile;

		RResourceFile iGroupResourceFile;

		TBool iGroupResourceFileExists;

		TResourceReader iResourceReader;

		HBufC8* iResourceBuffer;

	};

#endif