oidc_error.h

#ifndef SOURCEMETA_CORE_OIDC_ERROR_H_
#define SOURCEMETA_CORE_OIDC_ERROR_H_
 
#ifndef SOURCEMETA_CORE_OIDC_EXPORT
#include <sourcemeta/core/oidc_export.h>
#endif
 
#include <cstdint>     // std::uint8_t
#include <exception>   // std::exception
#include <optional>    // std::optional
#include <string_view> // std::string_view
 
namespace sourcemeta::core {
 
#if defined(_MSC_VER)
#pragma warning(disable : 4251 4275)
#endif

class SOURCEMETA_CORE_OIDC_EXPORT OIDCMetadataParseError
    : public std::exception {
public:
  [[nodiscard]] auto what() const noexcept -> const char * override {
    return "The input is not a valid OpenID Provider metadata document";
  }
};

class SOURCEMETA_CORE_OIDC_EXPORT OIDCRegistrationParseError
    : public std::exception {
public:
  [[nodiscard]] auto what() const noexcept -> const char * override {
    return "The input is not a valid OpenID Connect client registration "
           "document";
  }
};
 
#if defined(_MSC_VER)
#pragma warning(default : 4251 4275)
#endif

enum class OIDCAuthenticationError : std::uint8_t {
  InteractionRequired,
  LoginRequired,
  AccountSelectionRequired,
  ConsentRequired,
  InvalidRequestURI,
  InvalidRequestObject,
  RequestNotSupported,
  RequestURINotSupported,
  RegistrationNotSupported
};

SOURCEMETA_CORE_OIDC_EXPORT
auto oidc_error_code(const OIDCAuthenticationError error) noexcept
    -> std::string_view;

SOURCEMETA_CORE_OIDC_EXPORT
auto to_oidc_authentication_error(const std::string_view code) noexcept
    -> std::optional<OIDCAuthenticationError>;
 
} // namespace sourcemeta::core
 
#endif