gistfile1.rb

#!/usr/bin/env ruby
# -*- coding: utf-8 -*-

require 'rubygems'

require 'rufus/verbs' # gem rufus-verbs
require 'json' # gem json or json_pure
require 'growl' # gem growlnotifier (and rubycocoa)

def get_password key
  result = `/usr/bin/security 2>&1 >/dev/null find-internet-password -gs #{key}`
  if result =~ /password: "(.*)"/
    $1
  else
    raise "Unknown password"
  end
end

# get password from keychain
USER = 'user_name'
PASS = get_password 'twitter.com'

GROWL = Growl::Notifier.sharedInstance
GROWL.register('twatch', ['twitter_update', 'issue'])

class ObjectStash
  def self.store obj, file_name
    marshal_dump = Marshal.dump(obj)
    file = File.new(file_name,'w')
    file.write marshal_dump
    file.close
    return obj
  end

  def self.load file_name
    begin
      file = File.open(file_name, 'r')
    ensure
      obj = Marshal.load file.read
      file.close
      return obj
    end
  end
end

begin
  $last_seen_id = ObjectStash.load "#{ENV['HOME']}/growl.stash"
rescue
  $last_seen_id = ''  
end

def fetch_tweets
  if $last_seen_id == ''
    res = Rufus::Verbs.get(
      "https://twitter.com/statuses/friends_timeline.json",
      :hba => [ USER, PASS ]
    )
  else
    res = Rufus::Verbs.get(
      "https://twitter.com/statuses/friends_timeline.json?since_id=#{$last_seen_id}",
      :hba => [ USER, PASS ]
    )
  end
    
  raise "#{res.code} != 200" if res.code.to_i != 200

  json = JSON.parse(res.body)

  json.each_with_index do |message, i|
    # store the last id
    $last_seen_id = message['id'] if i == 0
    
    user = message['user']
    u = user['profile_image_url']
    u = OSX::NSURL.alloc.initWithString(u)
    i = OSX::NSImage.alloc.initWithContentsOfURL(u)

    GROWL.notify(
      'twitter_update',
      "#{user['name']} (#{user['screen_name']})",
      message['text'],
      :icon => i
    )
  end
end

begin
  fetch_tweets
rescue Exception => e
  GROWL.notify('issue', 'twatch issue', e.to_s)
end

ObjectStash.store $last_seen_id, "#{ENV['HOME']}/growl.stash"