// Copyright (c) 2005-2009 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 __VTZRULES_H__

#define __VTZRULES_H__

#include <e32base.h>

#include <s32strm.h>

#include <tzdefines.h>

#include <tz.h>

class CVTzActualisedRules;

class TVTzActualisedRule; 

const TInt KVTzRulesGranularity = 4;

/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *

 *	Time zone rules

 * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */

/**

Encapsulates one time zone rule.

@publishedAll

@released

*/

class TTzRule

	{

public:

	IMPORT_C TTzRule(TInt16 aFromYear, TInt16 aToYear, TInt16 aOldOffset, TInt16 aNewOffset, TMonth aMonth, TTzRuleDay aDayRule, 

				TUint8 aDayOfMonth, TUint8 aDayOfWeek, TTzTimeReference aTimeReference, TUint16 aTimeOfChange);

	IMPORT_C TTzRule();

	IMPORT_C TTzRule(const TTzRule& aRule);

	IMPORT_C TTzRule(TTimeWithReference aFromYear, TTimeWithReference aToYear, TInt16 aOldOffset, TInt16 aNewOffset, TMonth aMonth, TTzRuleDay aDayRule, 

				TUint8 aDayOfMonth, TUint8 aDayOfWeek, TTzTimeReference aTimeReference, TUint16 aTimeOfChange);

	void ExternalizeL(RWriteStream& aStream) const;

	void InternalizeL(RReadStream& aStream);		

	TBool RuleApplies(const TTime& aStart, const TTime& aEnd) const;		

	IMPORT_C TVTzActualisedRule Actualise(TInt aYear) const;    // deprecated, replace by the L version

	IMPORT_C TVTzActualisedRule ActualiseL(TInt aYear) const;   

public:

	TTimeWithReference iFrom;		// first date the rule applies

	TTimeWithReference iTo;			// last date the rule applies

	TInt16		iOldLocalTimeOffset; // local time offset (in minutes) BEFORE the change (local time = UTC + DST)

	TInt16		iNewLocalTimeOffset; // local time offset (in minutes) AFTER the change

	TMonth		iMonth;

	TTzRuleDay	iDayRule;		// format in which the rule is expressed

	TUint8		iDayOfMonth;

	TUint8		iDayOfWeek;

	TTzTimeReference iTimeReference;

	TUint16		iTimeOfChange;	// number of minutes since midnight

	TUint32		iReserved;

	};

/**

Encapsulates a collection of time zone rules, and includes the period covered by the rules

and the standard time offset at the start of that period.

@publishedAll

@released

*/

class CTzRules : public CBase

	{

public:

	IMPORT_C static CTzRules* NewL();

	IMPORT_C static CTzRules* NewL(TInt aStartYear, TInt aEndYear);

	IMPORT_C static CTzRules* NewL(RReadStream& aStream);

	IMPORT_C ~CTzRules();

	IMPORT_C TBool RulesApply(const TTime& aTime) const;

	IMPORT_C void AddRuleL(TTzRule aRule);

	IMPORT_C void RemoveRule(TInt aIndex);

	IMPORT_C TTzRule& operator[](TInt aIndex);

	IMPORT_C TInt Count() const;

	IMPORT_C TInt StartYear() const;

	IMPORT_C TInt EndYear() const;

	IMPORT_C void SetStartYear(TInt aYear);

	IMPORT_C void SetEndYear(TInt aYear);

	IMPORT_C void ExternalizeL(RWriteStream& aStream) const;

	IMPORT_C void InternalizeL(RReadStream& aStream);

	IMPORT_C TInt InitialStdTimeOffset() const;

	IMPORT_C void SetInitialStdTimeOffset(TInt aOffset);

	IMPORT_C void ConvertToUtcL(TTime& aLocalTime) const;

	IMPORT_C void ConvertToLocalL(TTime& aUtcTime) const;

	IMPORT_C CTzRules* CloneL() const;

	IMPORT_C TBool IsEqualTo(const CTzRules& aRules) const;

	IMPORT_C void GetActualisedRulesL(CVTzActualisedRules& aActRules) const;

	IMPORT_C TInt ConvertTime(CVTzActualisedRules& aRules, TTime& aTime, TTzTimeReference aTimerRef) const;

	IMPORT_C TInt GetOffsetL(const TTime& aTime, TTzTimeReference aTimeRef) const;

	IMPORT_C TInt SizeOfObject() const;

	IMPORT_C void CopyL(const CTzRules& aTzRule);

private:

	CTzRules();

	CTzRules(TInt aStartYear, TInt aEndYear);

	void AddActualisedRulesL(CVTzActualisedRules& aActRules, TInt aYear) const;

	TInt CompareTimesWithRef(TTime aTimeA, TTzTimeReference aTimeARef,

						     TTime aTimeB, TTzTimeReference aTimeBRef, TInt aStdOffset, TInt aWallOffset,

						     TTimeIntervalMinutes* aMinutesDifference) const;

private:

	TInt16 iStartYear;

	TInt16 iEndYear;

	RArray<TTzRule> iRules;

	TInt iInitialStdTimeOffset;

	mutable CVTzActualisedRules* iActualisedRulesCache;

	};

/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *

 *	Actualised time zone rules

 * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */

/**

Encapsulates a local time change.

@publishedAll

@released

*/

class TVTzActualisedRule

	{

public:	

	IMPORT_C TVTzActualisedRule(TTime aTimeOfChange, TInt aNewOffset, TTzTimeReference aTimeReference);

	IMPORT_C TVTzActualisedRule();

	IMPORT_C void operator=(TVTzActualisedRule aRule);

	static TInt Order(const TVTzActualisedRule& aLeft, const TVTzActualisedRule& aRight);	

public:

	TTime iTimeOfChange;

	TInt32  iNewOffset;

	TTzTimeReference iTimeReference;

	};

/**

Encapsulates a collection of the local time changes occurring during a range of years.

@publishedAll

@released

*/

NONSHARABLE_CLASS(CVTzActualisedRules) : public CBase

	{

public:

	IMPORT_C static CVTzActualisedRules* NewL(TInt aStartYear, TInt aEndYear);

	IMPORT_C ~CVTzActualisedRules();

	IMPORT_C void AddRuleL(const TVTzActualisedRule& aRule);

	IMPORT_C TInt Count() const;

	IMPORT_C TVTzActualisedRule& operator[](TInt aIndex) const;

	IMPORT_C TInt StartYear() const;

	IMPORT_C TInt EndYear() const;

	IMPORT_C TBool IsDaylightSavingOn(TTime& aTime) const;

	IMPORT_C TInt GetOffsetFromRuleL(const TTime& aTime, TTzTimeReference aTimeRef) const;

private:

	CVTzActualisedRules(TInt aStartYear, TInt aEndYear);

	CVTzActualisedRules();

	TInt CompareTimesWithRef(TTime aRolloverTime, TTzTimeReference aTimeRefRollover, 

							 TTime aUserTime, TTzTimeReference aTimeRefUser,

							 TInt aOldWallOffset, TTimeIntervalMinutes& aDiffMinutes) const;

private:

	TInt32 iStartYear;		// years covered by 

	TInt32 iEndYear;		// the actualised rules

	RArray<TVTzActualisedRule> iRules;	

	};

#endif