forked from Green-Sky/tomato
69 lines
1.9 KiB
C++
69 lines
1.9 KiB
C++
#pragma once
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#include <entt/core/type_info.hpp>
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#include <entt/container/dense_map.hpp>
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#include <entt/entity/handle.hpp>
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#include <nlohmann/json_fwd.hpp>
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template<typename EntityType = entt::entity>
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struct SerializerCallbacks {
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using Registry = entt::basic_registry<EntityType>;
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using Handle = entt::basic_handle<Registry>;
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// nlohmann
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// json/msgpack
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using serialize_json_fn = bool(*)(const Handle h, nlohmann::json& out);
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entt::dense_map<entt::id_type, serialize_json_fn> _serl_json;
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using deserialize_json_fn = bool(*)(Handle h, const nlohmann::json& in);
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entt::dense_map<entt::id_type, deserialize_json_fn> _deserl_json;
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template<typename T>
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static bool component_get_json(const Handle h, nlohmann::json& j) {
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if (h.template all_of<T>()) {
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if constexpr (!std::is_empty_v<T>) {
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j = h.template get<T>();
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}
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return true;
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}
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return false;
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}
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template<typename T>
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static bool component_emplace_or_replace_json(Handle h, const nlohmann::json& j) {
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if constexpr (std::is_empty_v<T>) {
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h.template emplace_or_replace<T>(); // assert empty json?
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} else {
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h.template emplace_or_replace<T>(static_cast<T>(j));
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}
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return true;
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}
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void registerSerializerJson(serialize_json_fn fn, const entt::type_info& type_info) {
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_serl_json[type_info.hash()] = fn;
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}
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template<typename CompType>
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void registerSerializerJson(
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serialize_json_fn fn = component_get_json<CompType>,
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const entt::type_info& type_info = entt::type_id<CompType>()
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) {
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registerSerializerJson(fn, type_info);
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}
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void registerDeSerializerJson(deserialize_json_fn fn, const entt::type_info& type_info) {
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_deserl_json[type_info.hash()] = fn;
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}
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template<typename CompType>
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void registerDeSerializerJson(
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deserialize_json_fn fn = component_emplace_or_replace_json<CompType>,
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const entt::type_info& type_info = entt::type_id<CompType>()
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) {
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registerDeSerializerJson(fn, type_info);
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}
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};
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