Set to true on line 44 to find bicycle routes

Ride4Ruby.rb

require 'net/http'
require 'rexml/document'

MAPS_KEY = ''
UNIT = 'imperial' # or 'metric' (For us that uses the metric system)

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']

western = {:address => '', :long => 180.0, :lat => 0.0}
eastern = {:address => '', :long => -180.0, :lat => 0.0}

i = 0
states.each do |state|
  # Just to give a bit of progression in the terminal
  puts "\e[H\e[2J#{i*2}%"
  i += 1
  
  url = URI.parse("http://maps.google.com/maps/geo?q=#{URI.escape state}%20Ruby%20Street&output=xml&key=#{MAPS_KEY}")
  xml = Net::HTTP.get_response(url)
  document = REXML::Document.new(xml.body)
  
  document.elements.each('kml/Response/Placemark') do |placemark|
    next unless placemark.elements['AddressDetails/Country/CountryNameCode'].text == 'US'
    
    coordinates = placemark.elements['Point/coordinates'].text.split(',')
    
    current_position = {:address => placemark.elements['address'].text, :long => coordinates[0].to_f, :lat => coordinates[1].to_f}
    
    western = current_position if western[:long] > current_position[:long]
    eastern = current_position if eastern[:long] < current_position[:long]
  end
end
puts "\e[H\e[2JCalculating the distance"
distance_url = URI.parse("http://maps.google.com/maps/api/directions/xml?origin=#{eastern[:lat]},#{eastern[:long]}&destination=#{western[:lat]},#{western[:long]}&sensor=false&key=#{MAPS_KEY}&units=#{UNIT}")
distance_xml = Net::HTTP.get_response(distance_url)
distance_document = REXML::Document.new(distance_xml.body)
distance = distance_document.elements["DirectionsResponse/route/leg/distance/text"].text

#Set this to true to find the shortest bicycle route
if false
  puts "\e[H\e[2JCalculating the bicycle distance"
  bicycle_url = URI.parse("http://maps.google.com/maps/api/directions/xml?origin=#{eastern[:lat]},#{eastern[:long]}&destination=#{western[:lat]},#{western[:long]}&sensor=false&key=#{MAPS_KEY}&units=#{UNIT}&mode=bicycling&alternatives=true")
  bicycle_xml = Net::HTTP.get_response(bicycle_url)
  bicycle_document = REXML::Document.new(bicycle_xml.body)
  bicycle_distance = 0
  bicycle_value = 0
  bicycle_document.elements.each("DirectionsResponse/route/leg/distance") do |dist|
    if dist.elements['value'].text.to_i > bicycle_value
      bicycle_distance = dist.elements['text'].text
      bicycle_value = dist.elements['value'].text.to_i
    end
  end
end

puts "\e[H\e[2JWestern most address #{western[:address]}"
puts "Eastern most address #{eastern[:address]}"
puts "Distance: #{distance}"
puts "Shortest bicycle distance: #{bicycle_distance}" if bicycle_distance