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/**
* @file config.hpp
* Manages name-value pairs for configuration options.
*
* Copyright (C) 2019 Clyne Sullivan
*
* 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 CONFIG_HPP_
#define CONFIG_HPP_
#include <map>
#include <optional>
#include <string>
#include <variant>
class Config
{
private:
static constexpr const char *fileName = "settings.json";
static std::map<std::string, std::variant<int, double, std::string>> values;
public:
template<typename T>
static std::optional<T> get(const std::string& name)
{
if (values.count(name) != 0) {
if (auto value = std::get_if<T>(&values[name]); value != nullptr)
return *value;
}
return {};
}
template<typename T>
static void set(const std::string& name, T val)
{
values[name] = val;
}
template<typename T>
static void require(const std::string& name, T defaultValue = T())
{
if (values.count(name) == 0)
values[name] = defaultValue();
}
static void save(void);
static void load(void);
};
#endif // CONFIG_HPP_
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