gistfile1.rb

require 'rubygems'
require 'nokogiri'
require 'open-uri'
require 'icalendar'
require 'date'

include Icalendar 

class IrekiaCalendar
  BASE_URL = "http://irekia.euskadi.net/es/dept/all/events?archive=f"

  def events   
    document.search('//div[@class="events_list"]/div[@class="news_row"]//td[@class="title"]').map { |p| 
      p.content.split("\n").map{|st| st.strip}.delete_if{|s| s == ""}
    } rescue []
  end

  def document
     @document ||= Nokogiri::HTML(open(BASE_URL).read)
  end                      
  def calendar
    cal = Calendar.new  
    self.events.each do |e|
      puts "Adding ... " + e.inspect if $DEBUG
      cal.event do
        dtstart      e[1]
        summary      e[0]
        description  e[0]
        klass        e[-1]
      end
    end
    cal
  end
end

cal = IrekiaCalendar.new.calendar
puts cal.to_ical if $DEBUG