/*

* Copyright (c) 2006-2009 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:  Active object for converting internal fileformat to GPX

*

*/

#ifndef CGPXCONVERTERAO_H_

#define CGPXCONVERTERAO_H_

#include <e32base.h>

#include <e32cmn.h>

#include <e32property.h>

#include <f32file.h>

#include <s32file.h>

#include "ctracklog.h"

const TInt KWriteBufSize = 256;

_LIT( KTagXml, "<?xml version=\"1.0\"?>" );

_LIT( KTagGpxStart, "<gpx version=\"1.1\" creator=\"Nokia TrackLog\">" );

_LIT( KTagGpxEnd, "</gpx>" );

_LIT( KTagMetaStart, "<metadata>" );

_LIT( KTagMetaEnd, "</metadata>" );

_LIT( KTagName, "<name>%S</name>" );

_LIT( KTagBounds, "<bounds minlat=\"%f\" minlon=\"%f\" maxlat=\"%f\" maxlon=\"%f\" />" );

_LIT( KTagTrackStart, "<trk>" );

_LIT( KTagTrackEnd, "</trk>" );

_LIT( KTagSegmentStart, "<trkseg>" );

_LIT( KTagSegmentEnd, "</trkseg>" );

_LIT( KTagTrkPointStart, "<trkpt lat=\"%f\" lon=\"%f\">" );

_LIT( KTagTrkPointEnd, "</trkpt>" );

_LIT( KTagElevation, "<ele>%f</ele>" );

_LIT( KTagTimeStamp, "<time>%d-%02d-%02dT%02d:%02d:%02dZ</time>" );

_LIT( KTagCourse, "<course>%f</course>" );

_LIT( KTagFix3D, "<fix>3d</fix>" );

_LIT( KTagFix2D, "<fix>2d</fix>" );

_LIT( KTagSatellites, "<sat>%d</sat>" );

_LIT( KTagHdop, "<hdop>%f</hdop>" );

_LIT( KTagVdop, "<vdop>%f</vdop>" );

class CGpxConverterAO : public CActive

  	{

  	private:

  		enum TProcessingState

  			{

  			EIdle,

  			ENextFile,

  			ECrashRecovery,

  			EStartFile,

  			EProcessing,

  			ECloseFile

  			};

  	public:

        /**

         * Creates and constructs a new instance of CContextBackupSubscriberAO.

         *

         * @return A pointer to the new instance.

         */

        static CGpxConverterAO* NewL();

        /**

         * Destructor.

         */

        virtual ~CGpxConverterAO();

        /**

         * From CActive.

         * This method will be called when Backup & Restore state changes.

         */

        void RunL();

        /**

         * From CActive.

         * Handles a leave occurring in the request completion event handler RunL().

         *

         * @param aError  An error code.

         * @return An error code.

         */

        TInt RunError( TInt aError );

        /**

         * From CActive.

         * Cancels.

         */

        void DoCancel();

        /**

         * Adds temp-file and possible pre-calculated boundaries

         * into processing queue

         */

        void AddToQueueL( const TDesC& aFileName, TBoundaries* aBoundaries = NULL );

        /**

         * Adds observer for GPX file creation notifications

         */

        void AddObserver( MGpxConversionObserver* aObserver );

    private:

        /**

         * Default constructor, implicitly called by NewL().

         */

    	CGpxConverterAO();

        /**

         * 2nd phase construction, called by NewL().

         */

        void ConstructL();

        /**

         * Set next state for RunL

         */

        void SetState( TProcessingState aState );

        /**

         * Resolve where to save tracklog file

         */

        void GetTrackLogPathL( TDes& aFileName );

        /**

         * Read Tag Id from temp-file

         */

        void ReadTagIdL();

        /**

         * Calculate min and max coordinates for tracklog

         */

        void CalculateBoundaries();

        /**

         * Writes header tags for GPX file

         */

        void WriteStartingTags();

        /**

         * Writes single trackpoint to GPX file

         */

        void WriteItemToFile();

        /**

         * Close GPX file 

         */

        void WriteClosingTags();

    private: // data

    	TInt iState;

    	RPointerArray<TFileName> iFileQueue;

    	RPointerArray<TBoundaries> iBoundQueue;

    	TFileName* iTempFile;    	

    	TBoundaries* iBoundaries;

    	TCoordinate* iLastCoords;

    	TFileName iGpxFileName;

    	TFileName iGpxPath;

    	RFs iFs;

    	RFileReadStream iReader;

    	RFile64 iGpxFile;

    	TTrackLogItem iTempItem;

    	HBufC8* iWriteBuf;

    	HBufC* iFormatBuf;

    	TBool iFixLost;

    	TItemId iTagId;

    	TTime iStartTime;

    	TTime iEndTime;

    	RPointerArray<MGpxConversionObserver> iObservers;

    };

#endif /*CGPXCONVERTERAO_H_*/