spacebox/src/Configuration.hpp

#ifndef Configuration_h_
#define Configuration_h_

#include "json/json.hpp"
#include "filesystem.hpp"
#include "Node.hpp"
#include "Animation.hpp"

class Configuration : public Node
{

private:
    
    nlohmann::json sys_config, user_config;
    fs::path config_path;
    int tab_width = 4;
    Animation auto_refresher = Animation(&Configuration::refresh, this);
    fs::file_time_type config_file_modification_time;

    void set_defaults();
    void merge();

public:

    nlohmann::json config;

    Configuration(Node*, fs::path = "config.json");
    void load(fs::path path);
    void load();
    void auto_refresh(bool);
    void refresh();
    void write(fs::path path);
    void write();
    void update();
    virtual std::string class_name() const { return "Configuration"; }

};

/* Extend GLM so nlohmann::json can read and write glm::vec2 */
namespace glm
{
    template <typename T>
    void to_json(nlohmann::json& j, const vec<2, T, defaultp>& v)
    {
        j = nlohmann::json{v.x, v.y};
    }

    template <typename T>
    void from_json(const nlohmann::json& j, vec<2, T, defaultp>& v)
    {
        j.at(0).get_to(v.x);
        j.at(1).get_to(v.y);
    }
}

/* Extend std::filesystem so nlohmann::json can read and write std::filesystem::path */
#if defined(__MINGW32__)
namespace std::experimental::filesystem
#else
namespace std::filesystem
#endif
{
    template <typename T>
    void to_json(nlohmann::json& j, const path& p)
    {
        j = nlohmann::json{p};
    }

    template <typename T>
    void from_json(const nlohmann::json& j, path& p)
    {
        j.at(0).get_to(p);
    }
}

#endif