Ride4Ruby

ride4ruby.rb

require 'hpricot'
require 'net/http'
require 'CGI'

class Place
  attr_accessor :city, :state, :zip_code, :longitude, :latitude
  
  def initialize city, state, zip_code, latitude, longitude
    @city, @state, @zip_code = city, state, zip_code
    @latitude, @longitude = latitude, longitude
  end
  
  def <=> other_place
    self.latitude <=> other_place.latitude
  end
end

city_path     = 'addressdetails/country/administrativearea/subadministrativearea/subadministrativeareaname'
zip_code_path = 'addressdetails/country/administrativearea/subadministrativearea/locality/postalcode/postalcodenumber'
country_path  = 'addressdetails/country/countryname'
coords_path   = 'point/coordinates'

states = ['Alabama', 'Alaska', 'Arizona', 'Arkansas', 'California', 'Colorado', 'Connecticut', 'Delaware', 'District of Columbia', 'Florida', 'Georgia', 'Idaho', 'Illinois', 'Indiana', 'Iowa', 'Kansas', 'Kentucky', 'Louisiana', 'Maine', 'Maryland', 'Massachusetts', 'Michigan', 'Minnesota', 'Mississippi', 'Missouri', 'Montana', 'Nebraska', 'Nevada', 'New Hampshire', 'New Jersey', 'New Mexico', 'New York', 'North Carolina', 'North Dakota', 'Ohio', 'Oklahoma', 'Oregon', 'Pennsylvania', 'Rhode Island', 'South Carolina', 'South Dakota', 'Tennessee', 'Texas', 'Utah', 'Vermont', 'Virginia', 'Washington', 'West Virginia', 'Wisconsin', 'Wyoming']
places = []

states.each do |state|
  url = "http://maps.google.com/maps/geo?q=#{CGI.escape(state)}%20Ruby%20Street&output=xml"
  xml = Net::HTTP.get_response(URI.parse url).body
  map_data = Hpricot(xml)
  
  (map_data/'kml/Response/Placemark').each do |place|
    city     = (place/city_path).inner_html
    zip_code = (place/zip_code_path).inner_html
    country  = (place/country_path).inner_html
    latitude, longitude = (place/coords_path).inner_html.split(',').map(&:to_f)
    places << Place.new(city, state, zip_code, latitude, longitude) if country == "USA"
  end
end

places.sort!

puts "Eastern : #{places[-1].city}, #{places[-1].state} (#{places[-1].latitude}, #{places[-1].longitude})"
puts "Western : #{places[0].city }, #{places[0].state } (#{places[0].latitude}, #{places[0].longitude})"

url = "http://maps.google.com/maps/api/directions/xml?origin=#{CGI.escape(places[-1].city + places[-1].state)}&destination=#{CGI.escape(places[0].city + places[0].state)}&sensor=false"
xml = Net::HTTP.get_response(URI.parse url).body
dist_data = Hpricot(xml)
distance  = (dist_data/'directionsresponse/route/leg/distance/text').inner_html

puts "Distance between the places is #{distance}."