Send a growl message with latest updates in your wakoopa feed

WakoopaGrowl.rb

#!/usr/bin/env ruby
#
# Send a growl message with latest updates in your feed
# 
# edit your crontab (crontab -e) and add this line
# (this checks your feed every 30 minutes)
# */30 * * * * ~/bin/WakoopaGrowl.rb > /dev/null
# 
# create a yaml file (mate ~/.wakoopa_growl) within your homedirectory 
# username: your_username

require 'yaml'

prefs = File.expand_path('~/.wakoopa_growl')

begin
  @wakoopa_config = YAML.load_file(prefs)
rescue Errno::ENOENT
  raise "No such file! (#{prefs})"
end

if @wakoopa_config['username']
  @username = @wakoopa_config['username']
else
  raise "Provide a username in the config file (#{prefs}): username: username"
end

def growl(msg, img = nil)
  title = 'Wakoopa New Software'
  msg = "You started using #{msg}"
  img ||= "/Applications/Wakoopa\ Tracker.app/Contents/Resources/icon.icns"
  cmd = "/usr/local/bin/growlnotify -n wakoopa --image \"#{img}\" -m #{msg.inspect} \"#{title}\" "#{}"--udp --host localhost"
  system `#{cmd}`
end

require 'rss'
# What feed are we parsing?
rss_feed = "http://wakoopa.com/" + @username + "/feed/"

# check latest update 
from_date = @wakoopa_config['last_date'] || Time.at(0) 

# Variable for storing feed content
rss_content = ""

# Read the feed into rss_content
open(rss_feed) do |f|
   rss_content = f.read
end

# Parse the feed, dumping its contents to rss
rss = RSS::Parser.parse(rss_content, false)

rss.items.reverse.each { |item|
  distance = from_date.utc.to_i - item.pubDate.utc.to_i
  if distance < 0
    growl(item.title.strip)
  end
  @wakoopa_config['last_date'] = item.pubDate.utc
}
# write lastdate back to file
File.open(prefs, 'w') { |f| f.puts @wakoopa_config.to_yaml }