/*

* Copyright (c) 2002-2004 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 : Class looking after alarm fields for forms.

*

*/

#ifndef C_CALENSOLARTERMS_H

#define C_CALENSOLARTERMS_H

// INCLUDES

#include <badesca.h>

#include <e32base.h>

// FORWARD DECLARATION

class RFs;

// CONSTANTS

const TInt KSolarTermCount( 24 );

/**

 * Provides Solar term dates for Lunar Calendar. 

 *

 * Solar term dates are listed in special binary format file. 

 * CCalenSolarTerms reads and caches this file one year at a time.

 *

 *  @lib CalenLunar.dll

 *  @since S60 v3.1

 */

NONSHARABLE_CLASS( CCalenSolarTerms ) : public CBase

    {

public:

    static CCalenSolarTerms* NewL( RFs& aFs );

    virtual ~CCalenSolarTerms();

    /**

     * Checks if date is solar term date. If it is, returns index to particular solar term, otherwise returns error code

     * Index can be then passed to GetSolarTermNameL function. 

     *

     * @since S60 v3.1

     * @param aDateTime date that is checked 

     * @return index of solar term, if date is solar term date.

     *         KErrNone, if date is not solar term date

     *         KErrNotSupported, if date is outside of supported 

     *                           range for solar term data.

     */

    TInt CheckSolarTermDateL( const TDateTime& aDateTime ); 

private:

    CCalenSolarTerms( RFs& aFs );

    void ConstructL();

    /** 

     * Returns ETrue, if date fits into date range of available solar item 

     * data.

     * @since 3.0

     */

    TBool HasSolarTermDataAvailable( const TDateTime& aDate ) const;

    /**

     * Reads and caches 24 solar term dates from "SolarItems" file

     */

    void ReadSolarTermsL( TDateTime aDate );

private: // data

    /**

     * File server handle.

     */

    RFs& iFs;

    /**

     * Year that is currently cached from file to memory

     */

    TInt iCachedYear;

    /**

     * Table of solar term dates for currently cached year

     */

    TDateTime iSolarTermDates[KSolarTermCount];

    };

#endif // C_CALENSOLARTERMS_H