error.hpp

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#pragma once
 
#include "irsol/macros.hpp"
#include "irsol/protocol/message/in_messages.hpp"
#include "irsol/protocol/message/variants.hpp"
#include "irsol/traits.hpp"
#include "irsol/types.hpp"
 
#include <string>
 
namespace irsol {
namespace protocol {
 
struct Error
{
  std::string identifier;
 
  InMessageKind source;
 
  std::string description;
 
  std::string toString() const;
 
  template<typename T, std::enable_if_t<irsol::traits::is_type_in_variant_v<T, InMessage>, int> = 0>
  static Error from(const T& msg, const std::string& description)
  {
    if constexpr(std::is_same_v<T, Assignment>) {
      return Error(msg.identifier, InMessageKind::ASSIGNMENT, description);
    } else if constexpr(std::is_same_v<T, Inquiry>) {
      return Error(msg.identifier, InMessageKind::INQUIRY, description);
    } else if constexpr(std::is_same_v<T, Command>) {
      return Error(msg.identifier, InMessageKind::COMMAND, description);
    } else {
      IRSOL_MISSING_TEMPLATE_SPECIALIZATION(T, "Error::from<T>()");
    }
  }
 
  static Error from(const InMessage& message, const std::string& description);
 
private:
  // Construction is only permitted through factory methods
  Error(const std::string& identifier, InMessageKind source, const std::string& description);
};
 
}  // namespace protocol
}  // namespace irsol