Simple postal code search using the Geonames web service

postal-code-search.rb

require 'rubygems'
require 'geonames' # ppe-ruby-geonames

class PostalCodeSearch
  include Geonames

  def initialize(postal_code, country_code = "US")
    @postal_code = postal_code
    @country_code = country_code
    @response = nil
  end
  
  def hash
    return hash_from_response(@response) if @response
    search = PostalCodeSearchCriteria.new
    search.postal_code = @postal_code
    search.country_code = @country_code
    @response = WebService.postal_code_search(search)
    @response.empty? ? nil : hash_from_response(@response) 
  end
  
  def latlng
    [hash[:latitude], hash[:longitude]] if hash
  end
  
  def hash_from_response(response)
    {
      :latitude  => response.first.latitude,
      :longitude => response.first.longitude
    }
  end
end

# PostalCodeSearch.new("92064").hash
# PostalCodeSearch.new("V6Z 2R9","CA").latlng