demarches-normaliennes/app/lib/api_adresse/point_retriever.rb

module ApiAdresse
  # input : address
  # output : point RGeo::Cartesian::PointImpl
  class PointRetriever
    def initialize(address)
      @address = address
    end

    def point
      @point ||= convert_api_result_to_point
    end

    private

    def api
      @api ||= ApiAdresse::API.new(@address)
    end

    def convert_api_result_to_point
      result = JSON.parse(api.call)
      if result['features'].empty?
        Rails.logger.error "unable to find location for address #{@address}"
        return nil
      end
      RGeo::GeoJSON.decode(result['features'][0]['geometry'], json_parser: :json)
    end
  end
end