Add ipstack geocoder

lib/geokit/geocoders/ipstack.rb

@@ -0,0 +1,36 @@
+module Geokit
+  module Geocoders
+    # Provides geocoding based upon an IP address.  The underlying web service is freegeoip.net
+    class IpstackGeocoder < BaseIpGeocoder
+      config :api_key
+      self.secure = true
+
+      private
+
+      def self.do_geocode(ip, _options = nil)
+        process :json, ip
+      end
+
+      def self.submit_url(ip)
+        "#{protocol}://api.ipstack.com/#{ip}?access_key=#{api_key}"
+      end
+
+      def self.parse_json(result)
+        loc = new_loc
+        return loc if result['success'] == false
+
+        loc.city = result['city']
+        loc.state_code = result['region_code']
+        loc.state_name = result['region_name']
+        loc.zip = result['zip']
+        loc.lat = result['latitude']
+        loc.lng = result['longitude']
+        loc.country_code = result['country_code']
+        loc.country = result['country_name']
+        loc.success = !loc.city.nil?
+
+        loc
+      end
+    end
+  end
+end

test/test_ipstack_geocoder.rb

@@ -0,0 +1,27 @@
+require File.join(File.dirname(__FILE__), 'helper')
+
+class IpstackGeocoderTest < BaseGeocoderTest #:nodoc: all
+  def setup
+    super
+    @ip = '68.194.36.44'
+    geocoder_class.api_key = 'some_api_key'
+  end
+
+  def assert_url(expected_url)
+    assert_equal expected_url, TestHelper.last_url
+  end
+
+  def test_free_geo_ip_geocode
+    url = "http://api.ipstack.com/#{@ip}?access_key=some_api_key"
+    res = geocode(@ip, :ipstack_geocode)
+
+    assert_url url
+    assert_equal res.city, 'The Bronx'
+    assert_equal res.state, 'NY'
+    assert_equal res.state_name, 'New York'
+    assert_equal res.zip, '10466'
+    assert_equal res.country_code, 'US'
+    assert_equal res.country, 'United States'
+    assert_equal res.success?, true
+  end
+end