74 lines
2.5 KiB
C++
74 lines
2.5 KiB
C++
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/************************************************************************************
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*
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* D++, A Lightweight C++ library for Discord
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*
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* Copyright 2022 Craig Edwards and D++ contributors
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* (https://github.com/brainboxdotcc/DPP/graphs/contributors)
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*
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************************************************************************************/
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#pragma once
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#include <dpp/export.h>
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#include <dpp/json_fwd.h>
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namespace dpp {
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/**
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* @brief Represents an interface for an object that can optionally implement functions
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* for converting to and from nlohmann::json. The methods are only present if the actual object
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* also has those methods.
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*
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* @tparam T Type of class that implements the interface
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*/
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template<typename T>
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struct json_interface {
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/**
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* @brief Convert object from nlohmann::json
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*
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* @param j nlohmann::json object
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* @return T& Reference to self for fluent calling
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*/
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template <typename U = T, typename = decltype(std::declval<U&>().fill_from_json_impl(std::declval<nlohmann::json*>()))>
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T& fill_from_json(nlohmann::json* j) {
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return static_cast<T*>(this)->fill_from_json_impl(j);
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}
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/**
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* @brief Convert object to nlohmann::json
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*
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* @param with_id Whether to include the ID or not
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* @note Some fields are conditionally filled, do not rely on all fields being present
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* @return json Json built from the structure
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*/
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template <typename U = T, typename = decltype(std::declval<U&>().to_json_impl(bool{}))>
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auto to_json(bool with_id = false) const {
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return static_cast<const T*>(this)->to_json_impl(with_id);
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}
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/**
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* @brief Convert object to json string
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*
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* @param with_id Whether to include the ID or not
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* @note Some fields are conditionally filled, do not rely on all fields being present
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* @return std::string Json built from the structure
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*/
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template <typename U = T, typename = decltype(std::declval<U&>().to_json_impl(bool{}))>
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std::string build_json(bool with_id = false) const {
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return to_json(with_id).dump();
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}
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};
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} // namespace dpp
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