The Stack...

thestackstruct.rb

require 'rubygems'
require 'open-uri'
require 'nokogiri'

module Distributor
  module Page
    def initialize(url=nil)
      @page = Nokogiri::HTML(open(url))
    end
  end
  
  class DCUniverse    
    CatalogURL = "http://www.dccomics.com/dcu/comics/"
    ProductPattern = /\/dcu\/comics\/(\?\w+=\d+)\z/
    
    attr_reader :catalog
    
    def initialize
      @catalog = get_page(CatalogURL)
    end
    
    def get_page(url)
      if url.match(ProductPattern)
        # product page
        Pages::Product.new(url)
      else
        # catalog page
        Pages::Catalog.new(url) unless url != CatalogURL
      end
    end
    
    def product(item)
      get_page(CatalogURL + item.attributes['href'])
    end
    
    module Pages
      class Catalog
        include Distributor::Page
        
        def items
          @page.search("#main_content div.accordion ul li a").to_a
        end
      end
      
      class Product
        include Distributor::Page
        
        def title
          @page.at("#h2-div").inner_text.strip
        end
      end
    end
  end
end

dc = Distributor::DCUniverse.new
item = dc.catalog.items.first # <a href="?cm=12435" name="/media/product/1/2/12435_120x180.jpg">BATMAN CONFIDENTIAL #32</a>
product = dc.product(item)
puts product.title # BATMAN CONFIDENTIAL #32