Commit ef32c5d

@@ -0,0 +1,42 @@
+require_relative '../GeoLocationService.rb'
+
+describe GeoLocationService do
+	it "can get a location" do
+		result = GeoLocationService.GetGeoLocation("Stampede Grounds, Calgary, Alberta")
+		result.should_not be_nil
+		result.should be_an_instance_of(GeoLocation)
+	end
+	
+	it "can get a correction location" do
+		result = GeoLocationService.GetGeoLocation("Stampede Grounds, Calgary, Alberta")
+		result.should_not be_nil
+		result.x.should_not be_nil
+		
+	end
+	
+	it "can get a location data" do
+		result = GeoLocationService.GetGeoLocationData("Stampede Grounds, Calgary, Alberta")
+		result.should_not be_nil
+	end
+	
+	it "can parse json result to get geolocation" do
+		json = GeoLocationService.GetGeoLocationData("Stampede Grounds, Calgary, Alberta")
+		result = GeoLocationService.ExtractGeoLocationFromJson(json)
+		result.should_not be_nil
+		result.should be_an_instance_of(GeoLocation)
+	end
+	
+	it "can get correct geo location for stampede grounds" do
+		result = GeoLocationService.GetGeoLocation("Stampede Grounds, Calgary, Alberta")
+		result.should be_an_instance_of(GeoLocation)
+		result.x.should be_within(0.0001).of(-114.0630194)
+		result.y.should be_within(0.0001).of(51.045220523)
+	end
+	
+	it "can look up by address" do
+		result = GeoLocationService.GetGeoLocation("200 E Randolph St, Chicago, IL")
+		result.should be_an_instance_of(GeoLocation)
+		result.x.should be_within(0.0001).of(-87.6221405679)
+		result.y.should be_within(0.0001).of(41.8845104628)
+	end
+end
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@@ -0,0 +1,42 @@
+# A service that can look up a geo-location from a string
+# the api this is based on (ERSI) seems fairly robust and can
+# take landmarks (Stampede Grounds) and street addresses.
+
+# work by Chris Desmarais (codeshoulders@gmail.com)
+
+require 'rest_client'
+require 'open-uri'
+require 'json'
+
+class GeoLocationService
+
+	def self.GetGeoLocation( locationString)
+		return ExtractGeoLocationFromJson( GetGeoLocationData( locationString ) )
+	end
+
+	def self.GetGeoLocationData(locationString)
+		urlAsString =  "http://geocode.arcgis.com/arcgis/rest/services/World/GeocodeServer/find?f=pjson&text="
+		urlAsString += URI::encode(locationString)
+		return RestClient.get urlAsString	
+	end
+	
+	def self.ExtractGeoLocationFromJson( jsonString)
+		parsed = JSON.parse(jsonString)
+		
+		# need to handle more than one match
+		x = parsed["locations"][0]["feature"]["geometry"]["x"]
+		y = parsed["locations"][0]["feature"]["geometry"]["y"]
+		return GeoLocation.new( x, y)
+	end
+end
+
+class GeoLocation
+
+	attr_accessor :x, :y
+	
+	def initialize (x,y)
+		@x = x
+		@y = y
+	end
+end
+