/**********************************************************************************************
    Copyright (C) 2015 Christian Eichler <code@christian-eichler.de>

    This program is free software: you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with this program.  If not, see <http://www.gnu.org/licenses/>.

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

#ifndef CSLFREADER_H
#define CSLFREADER_H

#include <QDateTime>
#include <QDomNode>
#include <QString>

#include "gis/prj/IGisProject.h"

class CSlfProject;

class CSlfReader
{
    Q_DECLARE_TR_FUNCTIONS(CSlfReader)
public:
    static void readFile(const QString& file, CSlfProject* proj);

private:
    CSlfReader(const QString& filename, CSlfProject* proj);

    void readMarkers(const QDomNode& xml);
    void readEntries(const QDomNode& xml);
    void readMetadata(const QDomNode& xml, IGisProject::metadata_t& metadata);

    /**
       @brief Search for attributes that are not 0-only.

       Sigma Data Center even stores non-used values (as 0) within the .slf file.
       As we do not want to include those 0-only values as extensions, we need to
       search for used attributes first.

       @param xmlEntrs  List of nodes
       @return  Set of used attributes
     */
    QSet<QString> findUsedAttributes(const QDomNodeList& xmlEntrs);

    static QDateTime parseTimestamp(const QString& ts);

    CSlfProject* proj = nullptr;   //< the resulting project after construction
    QDateTime baseTime;            //< the time all entries refer to
    QList<long>    offsetsTime;    //< an additional offset, required to take breaks into account
    QList<long>    laps;           //< the distances a new lap starts at (a lap is a .slf segment)

    static const QHash<QString, QString> attrToExt;
};

#endif // CSLFREADER_H