demarches-normaliennes/app/lib/api_geo/driver.rb

class ApiGeo::Driver
  def self.regions
    url = [API_GEO_URL, "regions"].join("/")
    call(url)
  end

  def self.departements
    url = [API_GEO_URL, "departements"].join("/")
    call(url)
  end

  def self.pays
    File.open('app/lib/api_geo/pays.json').read
  end

  private

  def self.call(url)
    RestClient.get(url, params: { fields: :nom })
  rescue RestClient::ServiceUnavailable
    nil
  end
end