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+/****************************************************************************
+**
+** Copyright (C) 2017 The Qt Company Ltd.
+** Contact: http://www.qt.io/licensing/
+**
+** This file is part of the E-Bike demo project.
+**
+** $QT_BEGIN_LICENSE:LGPL3$
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and The Qt Company. For licensing terms
+** and conditions see http://www.qt.io/terms-conditions. For further
+** information use the contact form at http://www.qt.io/contact-us.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 3 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPLv3 included in the
+** packaging of this file. Please review the following information to
+** ensure the GNU Lesser General Public License version 3 requirements
+** will be met: https://www.gnu.org/licenses/lgpl.html.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 2.0 or later as published by the Free
+** Software Foundation and appearing in the file LICENSE.GPL included in
+** the packaging of this file. Please review the following information to
+** ensure the GNU General Public License version 2.0 requirements will be
+** met: http://www.gnu.org/licenses/gpl-2.0.html.
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef TRIPDATA_H
+#define TRIPDATA_H
+
+#include <QElapsedTimer>
+#include <QJsonObject>
+#include <QList>
+
+class TripData
+{
+public:
+    TripData();
+    TripData(double duration, double distance, double calories,
+             double maxspeed, double ascent, double starttime);
+    TripData(const QJsonObject &data);
+
+public:
+    double duration() const { return m_duration; }
+    double distance() const { return m_distance; }
+    double calories() const { return m_calories; }
+    double maxSpeed() const { return m_maxspeed; }
+    double avgSpeed() const { return m_distance / m_duration; }
+    double ascent() const { return m_ascent; }
+    double startTime() const { return m_starttime; }
+
+    void setDuration(double duration);
+    void setDistance(double distance);
+    void setCalories(double calories);
+    void setMaxSpeed(double maxspeed);
+    void setAscent(double ascent);
+    void setStartTime(double starttime=0);
+    void addDuration(double duration);
+    void addDistance(double distance);
+    void addCalories(double calories);
+    void clear();
+
+    // Load from file
+    bool load(const QString &filename);
+
+    // Save to file
+    void save(const QString &filename) const;
+
+    // Convert to Json Object
+    operator QJsonObject() const;
+    const QJsonObject toJsonObject(void) const;
+
+    // Create from Json
+    static TripData fromJsonObject(const QJsonObject &data);
+
+    // Load from binary Json data
+    static TripData fromFile(const QString &filename);
+
+private:
+    QElapsedTimer m_timer;
+    double m_duration; // Seconds
+    double m_distance; // Meters
+    double m_calories; // calories, not kcal
+    double m_maxspeed; // m/s
+    double m_ascent; // meters
+    double m_starttime; // Timestamp of the start of the trip
+};
+
+class Trips: public QList<TripData>
+{
+public:
+    // Load from file
+    bool load(const QString &filename);
+
+    // Save to file
+    void save(const QString &filename) const;
+
+    // Convert to Json Array
+    operator QJsonArray() const;
+    const QJsonArray toJsonArray(void) const;
+
+    // Load from binary Json data
+    static Trips fromFile(const QString &filename);
+};
+
+#endif // TRIPDATA_H