Add viewport method for Ovi

lib/geocoder/results/ovi.rb

@@ -53,6 +53,15 @@ module Geocoder::Result
       address_data['Country']
     end
 
+    def viewport
+      map_view = data['Location']['MapView'] || fail
+      south = map_view['BottomRight']['Latitude']
+      west = map_view['TopLeft']['Longitude']
+      north = map_view['TopLeft']['Latitude']
+      east = map_view['BottomRight']['Longitude']
+      [south, west, north, east]
+    end
+
     private # ----------------------------------------------------------------
 
     def address_data

test/unit/lookups/ovi_test.rb

+# encoding: utf-8
+$: << File.join(File.dirname(__FILE__), "..", "..")
+require 'test_helper'
+
+class OviTest < GeocoderTestCase
+
+  def setup
+    Geocoder.configure(lookup: :ovi)
+  end
+
+  def test_ovi_viewport
+    result = Geocoder.search("Madison Square Garden, New York, NY").first
+    assert_equal [40.7493451, -73.9948616, 40.7515934, -73.9918938],
+      result.viewport
+  end
+
+end