lay/toREST/include/http.hpp

#pragma once
#include <nlohmann/json.hpp>
#include <unordered_map>

namespace http {
/// http codes
enum status {
  /*! Standard response for successful HTTP requests. */ ok = 200,
  /*! The request has been fulfilled, resulting in the creation of a new resource. */ created = 201,
  /*! The request has been accepted for processing, but the processing has not been completed. */ accepted = 202,
  /*! The server successfully processed the request and is not returning any content. */ no_content = 204,
  /*! The server cannot or will not process the request due to an apparent client error */ bad_request = 400,
  /*! Similar to 403 Forbidden, but specifically for use when authentication is required and has failed or has not yet been provided. */ unauthorized = 401,
  /*! Reserved for future use. The */ payment_required = 402,
  /*! the request was a valid request, but the server is refusing to respond to it. */ forbidden = 403,
  /*! The requested resource could not be found but may be available in the future. */ not_found = 404,
  /*! Allowed A request method is not supported for the requested resource */ method_not_allowed = 405,
  /*! The resource identified by the request is only capable of generating response entities which have content characteristics not acceptable according to the accept headers sent in the request. */ not_acceptable = 406,
  /*! A generic error message, given when an unexpected condition was encountered and no more specific message is suitable. */ internal_server_error = 500,
  /*! The server either does not recognize the request method, or it lacks the ability to fulfill the request. */ not_implemented = 501,
  /*! The server was acting as a gateway or proxy and received an invalid response from the upstream server. */ bad_gateway = 502,
  /*! The server is currently unavailable (because it is overloaded or down for maintenance). Generally, this is a temporary state. */ service_unavailable = 503,
  /*! Gateway timed out */ gateway_timeout = 504,
  /*! http-version not supported */ http_version_not_supported = 505
};
typedef std::pair<std::string, std::string> header;
typedef std::unordered_map<std::string, std::string> headers;

/// creates a http::code object out of a http::status code
class code {
public:
  code(status status);

public:
  status first;
  std::string second;
};

class response {
public:
  friend std::ostream &operator<<(std::ostream &os, const response &rh) { return rh.do_response(os); }
  response() : status_code(http::ok) {}
  void set_body(const std::string &content) { body = content; }
  void set_body(const nlohmann::json &json);
  void add_header(const http::header &header) { response_headers.emplace(header); }
  void set_status(http::status code) { status_code = code; }
  std::ostream &do_response(std::ostream &os) const;

protected:
  std::string body;
  headers response_headers;
  code status_code;
};
};