class Octokit::Error

def self.from_response(response)
  status  = response[:status].to_i
  body    = response[:body].to_s
  headers = response[:response_headers]
  if klass =  case status
              when 400      then Octokit::BadRequest
              when 401      then error_for_401(headers)
              when 403      then error_for_403(body)
              when 404      then error_for_404(body)
              when 405      then Octokit::MethodNotAllowed
              when 406      then Octokit::NotAcceptable
              when 409      then Octokit::Conflict
              when 410      then Octokit::Deprecated
              when 415      then Octokit::UnsupportedMediaType
              when 422      then error_for_422(body)
              when 451      then Octokit::UnavailableForLegalReasons
              when 400..499 then Octokit::ClientError
              when 500      then Octokit::InternalServerError
              when 501      then Octokit::NotImplemented
              when 502      then Octokit::BadGateway
              when 503      then Octokit::ServiceUnavailable
              when 500..599 then Octokit::ServerError
              end
    klass.new(response)
  end
end