Temperature.hpp

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// This file is part of INSTINCT, the INS Toolkit for Integrated
// Navigation Concepts and Training by the Institute of Navigation of
// the University of Stuttgart, Germany.
//
// This Source Code Form is subject to the terms of the Mozilla Public
// License, v. 2.0. If a copy of the MPL was not distributed with this
// file, You can obtain one at https://mozilla.org/MPL/2.0/.
 
 
#pragma once
 
#include <cstdint>
#include <fmt/format.h>
#include <nlohmann/json.hpp>
using json = nlohmann::json; 
 
namespace NAV
{
 
class TemperatureModel
{
  public:
    enum Model : uint8_t
    {
        None,  
        Const, 
        ISA,   
        GPT2,  
        GPT3,  
        COUNT, 
    };
 
    TemperatureModel(Model model) : _model(model) {} // NOLINT(google-explicit-constructor,hicpp-explicit-conversions)
 
    [[nodiscard]] double calcAbsoluteTemperature(double altitudeMSL) const;
 
    friend bool ComboTemperatureModel(const char* label, TemperatureModel& temperatureModel);
 
  private:
    Model _model = Model::ISA;
 
    double _constantTemperature = 290.0;
 
    friend constexpr bool operator==(const TemperatureModel& lhs, const TemperatureModel& rhs);
    friend constexpr bool operator==(const TemperatureModel& lhs, const TemperatureModel::Model& rhs);
    friend constexpr bool operator==(const TemperatureModel::Model& lhs, const TemperatureModel& rhs);
    friend bool ComboTemperatureModel(const char* label, TemperatureModel& temperatureModel);
    friend const char* to_string(const TemperatureModel& temperatureModel);
    friend void to_json(json& j, const TemperatureModel& obj);
    friend void from_json(const json& j, TemperatureModel& obj);
};
 
constexpr bool operator==(const TemperatureModel& lhs, const TemperatureModel& rhs)
{
    if (lhs._model == rhs._model)
    {
        if (lhs._model == TemperatureModel::Const) { return lhs._constantTemperature == rhs._constantTemperature; }
        return true;
    }
    return false;
}
 
constexpr bool operator==(const TemperatureModel& lhs, const TemperatureModel::Model& rhs) { return lhs._model == rhs; }
constexpr bool operator==(const TemperatureModel::Model& lhs, const TemperatureModel& rhs) { return lhs == rhs._model; }
 
bool ComboTemperatureModel(const char* label, TemperatureModel& temperatureModel);
 
const char* to_string(const TemperatureModel& temperatureModel);
const char* to_string(TemperatureModel::Model temperatureModel);
 
void to_json(json& j, const TemperatureModel& obj);
void from_json(const json& j, TemperatureModel& obj);
 
} // namespace NAV
 
#ifndef DOXYGEN_IGNORE
 
template<>
struct fmt::formatter<NAV::TemperatureModel> : fmt::formatter<std::string>
{
    template<typename FormatContext>
    auto format(const NAV::TemperatureModel& data, FormatContext& ctx) const
    {
        return fmt::formatter<std::string>::format(NAV::to_string(data), ctx);
    }
};
 
#endif