json.hpp

/*
  Copyright 2025 Peter Duanmu
 
  You should have received a copy of the GNU General Public License along
  with discord_ipc_cpp. If not, see <https://www.gnu.org/licenses/>.
*/
 
#ifndef DISCORD_IPC_CPP_INCLUDE_DISCORD_IPC_CPP_JSON_HPP_
#define DISCORD_IPC_CPP_INCLUDE_DISCORD_IPC_CPP_JSON_HPP_
 
#include <map>
#include <string>
#include <sstream>
#include <optional>
#include <variant>
#include <vector>

namespace discord_ipc_cpp::json {
class JSON;

using JSONNull = std::nullptr_t;
using JSONString = std::string;
using JSONInt = int;
using JSONLong = int64_t;
using JSONDouble = double;
using JSONBool = bool;
using JSONObject = std::map<std::string, JSON>;
using JSONArray = std::vector<JSON>;

class JSON {
 private:
  using JSONValue = std::variant<
    JSONNull,
    JSONString,
    JSONInt,
    JSONLong,
    JSONDouble,
    JSONBool,
    JSONArray,
    JSONObject
  >;

  JSONValue _value;
 
 private:
  void stringify(std::ostream& os) const;
 
 public:
  JSON();
  explicit JSON(JSONNull value);
  explicit JSON(const JSONString& value);
  explicit JSON(const char* value);
  explicit JSON(JSONInt value);
  explicit JSON(JSONLong value);
  explicit JSON(JSONDouble value);
  explicit JSON(JSONBool value);
  explicit JSON(const JSONArray& value);
  explicit JSON(const JSONObject& value);

  JSON& operator[](const JSONString& key);
  const JSON& operator[](const JSONString& key) const;

  const std::optional<JSON> safe_at(const JSONString& key) const;

  template<typename T>
  T as() const;
  template<typename T>
  std::optional<T> safe_as() const;

  template<typename T>
  bool is() const;

  bool has(const JSONString& key) const;

  void push_back(const JSON& item);

  std::string to_string() const;
};
}  // namespace discord_ipc_cpp::json
 
#endif  // DISCORD_IPC_CPP_INCLUDE_DISCORD_IPC_CPP_JSON_HPP_