json_io.hpp

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#pragma once
#include "le2d/anim/animation.hpp"
#include "le2d/resource/shader.hpp"
#include "le2d/resource/texture.hpp"
#include "le2d/tile/tile_set.hpp"
#include "le2d/uri.hpp"
#include <djson/json.hpp>
 
namespace le {
template <typename Type>
constexpr auto json_type_name_v = std::string_view{};
 
template <>
inline constexpr auto json_type_name_v<IShader> = std::string_view{"Shader"};
template <>
inline constexpr auto json_type_name_v<TileSet> = std::string_view{"TileSet"};
template <>
inline constexpr auto json_type_name_v<ITexture> = std::string_view{"Texture"};
template <>
inline constexpr auto json_type_name_v<ITileSheet> = std::string_view{"TileSheet"};
template <>
inline constexpr auto json_type_name_v<anim::Timeline<Transform>> = std::string_view{"anim::Timeline<Transform>"};
template <>
inline constexpr auto json_type_name_v<anim::Timeline<TileId>> = std::string_view{"anim::Timeline<TileId>"};
template <>
inline constexpr auto json_type_name_v<anim::Animation<Transform>> = std::string_view{"anim::Animation<Transform>"};
template <>
inline constexpr auto json_type_name_v<anim::Animation<TileId>> = std::string_view{"anim::Animation<TileId>"};
 
[[nodiscard]] auto get_json_type_name(dj::Json const& json) -> std::string_view;
void set_json_type_name(dj::Json& json, std::string_view type_name);
[[nodiscard]] auto json_type_name_match(dj::Json const& json, std::string_view type_name) -> bool;
 
template <typename Type>
auto is_json_type(dj::Json const& json, Type const& /*unused*/) -> bool {
    return json_type_name_match(json, json_type_name_v<Type>);
}
 
template <typename Type>
auto is_json_type(dj::Json const& json) -> bool {
    return json_type_name_match(json, json_type_name_v<Type>);
}
 
template <typename Type>
void set_json_type(dj::Json& json, Type const& /*unused*/) {
    set_json_type_name(json, json_type_name_v<Type>);
}
 
template <typename Type>
void set_json_type(dj::Json& json) {
    set_json_type_name(json, json_type_name_v<Type>);
}
 
template <typename Type, glm::length_t Length>
void from_json(dj::Json const& json, glm::vec<Length, Type>& vec) {
    if (!json.is_array()) { return; }
    from_json(json[0], vec.x);
    if constexpr (Length > 1) { from_json(json[1], vec.y); }
    if constexpr (Length > 2) { from_json(json[2], vec.z); }
}
 
template <typename Type, glm::length_t Length>
void to_json(dj::Json& json, glm::vec<Length, Type> const& vec) {
    to_json(json[0], vec.x);
    if constexpr (Length > 1) { to_json(json[1], vec.y); }
    if constexpr (Length > 2) { to_json(json[2], vec.z); }
}
 
template <typename Type>
void from_json(dj::Json const& json, kvf::Rect<Type>& rect) {
    from_json(json["lt"], rect.lt);
    from_json(json["rb"], rect.rb);
}
 
template <typename Type>
void to_json(dj::Json& json, kvf::Rect<Type> const& rect) {
    to_json(json["lt"], rect.lt);
    to_json(json["rb"], rect.rb);
}
 
void from_json(dj::Json const& json, Uri& uri);
void to_json(dj::Json& json, Uri const& uri);
 
void from_json(dj::Json const& json, kvf::Seconds& seconds);
void to_json(dj::Json& json, kvf::Seconds const& seconds);
 
void from_json(dj::Json const& json, TileId& tile_id);
void to_json(dj::Json& json, TileId const& tile_id);
 
void from_json(dj::Json const& json, Tile& tile);
void to_json(dj::Json& json, Tile const& tile);
 
void from_json(dj::Json const& json, Transform& transform);
void to_json(dj::Json& json, Transform const& transform);
 
void from_json(dj::Json const& json, TileSet& tile_set);
void to_json(dj::Json& json, TileSet const& tile_set);
 
void from_json(dj::Json const& json, anim::Keyframe<Transform>& keyframe);
void to_json(dj::Json& json, anim::Keyframe<Transform> const& keyframe);
 
void from_json(dj::Json const& json, anim::Timeline<Transform>& timeline);
void to_json(dj::Json& json, anim::Timeline<Transform> const& timeline);
 
void from_json(dj::Json const& json, anim::Animation<Transform>& animation);
void to_json(dj::Json& json, anim::Animation<Transform> const& animation);
 
void from_json(dj::Json const& json, anim::Keyframe<TileId>& keyframe);
void to_json(dj::Json& json, anim::Keyframe<TileId> const& keyframe);
 
void from_json(dj::Json const& json, anim::Timeline<TileId>& timeline);
void to_json(dj::Json& json, anim::Timeline<TileId> const& timeline);
 
void from_json(dj::Json const& json, anim::Animation<TileId>& animation);
void to_json(dj::Json& json, anim::Animation<TileId> const& animation);
} // namespace le