#!/usr/bin/env ruby
require 'rubygems'
require 'ruby-growl'
require 'hpricot'
require 'cgi'
require 'open-uri'

raise "#{$0} <user>" if ARGV.empty?
user = ARGV[0]
already_notified = []

while true do
  now_listening = Hpricot(open("http://www.last.fm/user/#{user}"))/".nowListening td.subject"
  unless now_listening.empty?
    currently_played = now_listening.last.inner_text.strip
    unless already_notified.include?(currently_played)
      already_notified << currently_played
      g = Growl.new("localhost", "ruby-growl", ["ruby-growl Notification"])
      g.notify("ruby-growl Notification", "#{user} is listening to", CGI::unescapeHTML(currently_played))
    end
  end
  sleep 60
end