# Very simple server-side lat/lng lookup via Google's geocoder service
#
# Example:
#
#   point = Geocoder.get "Wrigley Field"
#   point.lat   # => 41.9482
#   point.lng   # => -87.6557

%w(rubygems rack restclient json).each {|lib| require lib}

module Geocoder
  class Location < Struct.new(:name, :lat, :lng); end

  def self.get(location)
    resp = JSON.parse(get_raw(location))
    if placemark = resp["Placemark"]
      new_location(location, placemark[0])
    end
  end

  def self.get_raw(location)
    uri = "http://maps.google.com/maps/geo?sensor=false&output=json&q=#{Rack::Utils.escape(location)}"
    RestClient.get(uri)
  end

  private
    def self.new_location(location, placemark)
      Location.new(location, placemark["Point"]["coordinates"][1], placemark["Point"]["coordinates"][0])
    end
end