class CountriesController < ApplicationController
  helper_method %i[countries country]

  def countries
    resource_class.all
  end

  def country
    return resource_class.find(params[:id]) if params[:id].is_a?(Integer)
    return resource_class.find_by(iso2: params[:id]) if params[:id].length == 2
    resource_class.find_by(iso3: params[:id])
  end
end