Build a custom RSS feed for Penny Arcade comics and news posts

parss.rb

#!/usr/bin/env ruby

require 'rubygems'
require 'hpricot'
require 'open-uri'
require 'rss/maker'

class PA
  attr_accessor :date

  def initialize(d = DateTime.parse("#{Date.today} 00:00:00"))
    @date = d
  end
  
  def comic
    @comic ||= get(comic_url).search("div.body img").first
  end
  
  def news
    @news ||= get(news_url).search("div.body").first.inner_html
  end

  def title; "Penny-Arcade Comics"; end;
  def description; "Guys, get with it. Let's have an official RSS feed with comics."; end;
  def slug; "#{@date.year}/#{@date.month}/#{@date.day}"; end;
  def base_url; "http://www.penny-arcade.com"; end;
  def comic_url; "#{base_url}/comic/#{slug}/"; end;
  def news_url; "#{base_url}/#{slug}/"; end;

  private
  def get(url)
    open(url) { |f| Hpricot(f) }
  end
end
pa = PA.new

content  = RSS::Maker.make("2.0") do |m|
  m.channel.title = pa.title
  m.channel.link  = "#{pa.base_url}/"
  m.channel.description = pa.description
  m.items.do_sort = true
  
  i = m.items.new_item
  i.title = pa.comic.attributes['alt']
  i.link  = pa.comic_url
  i.date  = pa.date
  i.description = "#{pa.comic.to_html}<br /><br />#{pa.news}"
end

File.open('/var/www/pa.rss', "w") do |f|
  f.write(content)
end