http_codes.hpp

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#pragma once
 
#include <format>
 
namespace dcn::http
{
    enum class Code
    {
        // Unknown, specially reserved
        Unknown = 0,
 
        // level 200
        OK = 200,
        Created = 201,
        NoContent = 204,
 
        // LEVEL 400
        BadRequest = 400,
        Unauthorized = 401,
        Forbidden = 403,
        NotFound = 404,
 
        // LEVEL 500
        InternalServerError = 500,
        ServiceUnavailable = 503,
        GatewayTimeout = 504
    };
}
 
template <>
struct std::formatter<dcn::http::Code> : std::formatter<std::string> {
  auto format(dcn::http::Code code, format_context& ctx) const {
    switch(code)
    {
        // level 200
        case dcn::http::Code::OK:                  return formatter<string>::format("200 OK", ctx);
        case dcn::http::Code::Created:             return formatter<string>::format("201 Created", ctx);
        case dcn::http::Code::NoContent:           return formatter<string>::format("204 No Content", ctx);
 
        // LEVEL 400
        case dcn::http::Code::BadRequest:          return formatter<string>::format("400 Bad Request", ctx);
        case dcn::http::Code::Unauthorized:        return formatter<string>::format("401 Unauthorized", ctx);
        case dcn::http::Code::Forbidden:           return formatter<string>::format("403 Forbidden", ctx);
        case dcn::http::Code::NotFound:            return formatter<string>::format("404 Not Found", ctx);
        
        // LEVEL 500
        case dcn::http::Code::InternalServerError: return formatter<string>::format("500 Internal Server Error", ctx);
        case dcn::http::Code::ServiceUnavailable:  return formatter<string>::format("503 Service Unavailable", ctx);
        case dcn::http::Code::GatewayTimeout:      return formatter<string>::format("504 Gateway Timeout", ctx);
 
        // Unknown
        case dcn::http::Code::Unknown:      return formatter<string>::format("Unknown", ctx);
    }
    return formatter<string>::format("", ctx);
  }
};