earthquake.gem plugin: fav and follow events growl notifer

event_notifier_plus.rb

# -*- coding: utf-8 -*-
# event_notifer+ plugin
#
require "fileutils"
require "digest/md5"

Earthquake.init do
  dir = File.join(File.dirname(__FILE__), "userimage")
  output do |item|
    if item["event"] && item["source"]["screen_name"] != twitter.info["screen_name"]
      begin
        image_url = item["source"]["profile_image_url"]
        next unless image_url
        name = Digest::MD5.hexdigest image_url
        path = File.join(dir, name.chars.first, name)
        FileUtils.mkdir_p(File.dirname(path))
        text = item["target_object"] ? item["target_object"]["text"] : item["event"]
        arg = {
          "-t" => "#{item["event"].capitalize}: #{item["source"]["screen_name"]}",
          "-m" => "#{item["target"]["screen_name"]}: #{text}",
          "--image" => path,
          "--sticky" => "" # comment out this line if you want off "Growl sticky"
        }
        EM.defer(
                 lambda {
                   return path if File.exists?(path)
                   open(path, "w"){|f|
                     f.print open(image_url).read
                   }
                   path
                 },
                 lambda {|path|
                   system('growlnotify', *arg.to_a.flatten)
                 }
               )
      end
    end
  end
end