Geodata reverse lookup Ruby client

geo_data.rb

class GeoData
  require 'json'
  require 'net/http'

  attr_reader :lat, :lon

  def initialize(lat: lat, lon: lon)
    @lat = lat
    @lon = lon
  end

  def reverse_lookup
    build_query_params
    result = query_geodata
    build_address_hash(result)
  end


  private

  def build_address_hash(result)
    a = result['address']
    return if a.blank?
    hash = {
      street:       a['Adresse'],
      place:        a['Stedsnavn'],
      poi:          a['POI'],
      post_area:    a['Poststed'],
      area_code:    a['Postnummer'],
      municipality: a['Kommune']
    }
    hash.delete_if {|k, v| v == nil }
    puts "built hash: #{hash}"
    hash
  end
  
  def build_query_params
    location = { x: lon, y: lat, spatialReference:{ wkid: 4326 } }.to_json
    @uri     = URI('https://services2.geodataonline.no/arcgis/rest/services/' +
              'Geosok/GeosokLokasjon2/GeocodeServer/reverseGeocode')
    @params   = { location: location, token: generate_token, f: :json }
  end

  def query_geodata
    @uri.query = URI.encode_www_form(@params)
    res        = Net::HTTP.get_response(@uri)
    puts "result from Geodata API: #{res.body}"
    JSON.parse(res.body)
  end

  def generate_token
    uri = URI("https://tokens.geodataonline.no/arcgis/tokens/generateToken" +
          "?username=#{ENV['GEODATA_USERNAME']}" +
          "&password=#{ENV['GEODATA_PASSWORD']}")
    Net::HTTP.get_response(uri).body
  end

end