/*

* Copyright (c) 2007-2009 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:  Common Exif-utilities for harvester

*

*/

#ifndef HARVESTEREXIFUTIL_H

#define HARVESTEREXIFUTIL_H

// INCLUDES

#include <e32std.h>

#include <e32base.h>

#include <ExifRead.h>

#include <ExifTag.h>

#include <apmstd.h>

#include "harvesterlog.h"

#include "harvestdata.h"

#include "mdeobject.h"

#include "mdesession.h"

class CExifModify;

// CLASS DECLARATION

/**

*  CHarvesterExifUtil

* 

*/

NONSHARABLE_CLASS( CHarvesterExifUtil ) : public CBase

{

public: // Constructors and destructor

	/**

		* Destructor.

		*/

	IMPORT_C ~CHarvesterExifUtil();

		/**

		* Two-phased constructor.

		*/

	IMPORT_C static CHarvesterExifUtil* NewL();

		/**

		* Two-phased constructor.

		*/

	IMPORT_C static CHarvesterExifUtil* NewLC();

	IMPORT_C void SetSession( CMdESession* aSession );

		/**

		* 

		*/

	IMPORT_C static TBool IsValidExifData(TPtr8 aData);

	IMPORT_C static TInt ReadExifDataL( CHarvestData& aHd, CFileData& aFileData );

	IMPORT_C static TTime ConvertExifDateTimeToSymbianTimeL( const TDesC8& aDateTime );

	IMPORT_C TInt ComposeExifDataL( CMdEObject& aObject, TPtr8 aImagePtr, HBufC8*& aModified );

	IMPORT_C void ComposeLocationL( CMdEObject* aLocation, TPtr8 aImagePtr, HBufC8*& aModified );

protected:

	void SetExifDefaultsL( CMdEObject& aMdeObject, CExifModify& aExifModify );

	void AddPropertyL( CMdEObjectDef& aObjectDef, CMdEObject& aMdeObject,

			const TDesC& aProperty, TUint32 aValue );

	void AddPropertyL( CMdEObjectDef& aObjectDef, CMdEObject& aMdeObject,

			const TDesC& aProperty, TUint16 aValue );

	TBool ModifyExifTagL( CMdEObject& aMdeObject, CExifModify& aExifModify,

			const TDesC& aProperty, TExifIfdType aIFD, TUint16 aTagID, TBool aRemove = EFalse );

	HBufC8* GetPropertyValueLC( const CMdEPropertyDef& aPropDef,

			const CMdEProperty& aProperty );

	CExifTag::TExifTagDataType ExifTagDataType( TUint16 aTagID, const CMdEPropertyDef& aPropDef );

	TBool CompareTag( TPtrC8 aMdeData, const CExifTag* aTag );

	static HBufC16* ReadExifTagL( const CExifRead& aReader, TExifIfdType aIFD, TUint16 aTagID );

	static void StripNulls( HBufC& aString );

private:

	/**

		* Constructor for performing 1st stage construction

		*/

	CHarvesterExifUtil();

	/**

		* default constructor for performing 2nd stage construction

		*/

	void ConstructL();

	static void ReadUserCommentL( CHarvestData& aHd, CExifRead* aReader );

	static void ReadXResolutionL( CHarvestData& aHd, CExifRead* aReader );

	static void ReadYResolutionL( CHarvestData& aHd, CExifRead* aReader );

	static void ReadExposureBiasL( CHarvestData& aHd, CExifRead* aReader );

	static void ReadExposureTimeL( CHarvestData& aHd, CExifRead* aReader );

	static void ReadFNumberL( CHarvestData& aHd, CExifRead* aReader );

	static void ReadShutterSpeedL( CHarvestData& aHd, CExifRead* aReader );

	static void ReadApertureValueL( CHarvestData& aHd, CExifRead* aReader );

	static void ReadFocalLengthL( CHarvestData& aHd, CExifRead* aReader );

	static void ReadFocalLength35mmL( CHarvestData& aHd, CExifRead* aReader );

	static void ReadFocalXPlaneResolutionL( CHarvestData& aHd, CExifRead* aReader );

	static void ReadFocalYPlaneResolutionL( CHarvestData& aHd, CExifRead* aReader );

	static void ReadGPSLatitudeL( CHarvestData& aHd, CExifRead* aReader, TBool& aLatitude );

	static void ReadGPSLongitudeL( CHarvestData& aHd, CExifRead* aReader, TBool& aLatitude );

	static void ReadGPSAltitudeL( CHarvestData& aHd, CExifRead* aReader );

private:

	/** Pointer to mde session to use */

    CMdESession* iSession;

    /** Mde default namespace. NOT OWN. */

    CMdENamespaceDef* iDefaultNamespace;

};

#endif // HARVESTEREXIFUTIL_H