gistfile1.rb

#!/usr/bin/ruby

# cronjob set up like this:
# */5 * * * * /var/cron/twitter.rb 12571852 > /var/www/davideisinger.com/twitter.txt
# */5 * * * * /var/cron/twitter.rb 14090058 > /var/www/sarahbetheisinger.com/twitter.txt

require 'rubygems'
require 'net/http'
require 'json'

def web_link(url)
  text = url.length > 30 ? url[0, 30] + "…" : url
  "<a href=\"#{url}\">#{text}</a>"
end

def twitter_link(word)
  name = word[/\w+/]
  word.gsub(name, "<a href=\"http://twitter.com/#{name}\">#{name}</a>")
end

uri  = URI.parse("http://twitter.com/statuses/user_timeline/#{ARGV[0]}.json")
data = JSON.parse(Net::HTTP.get(uri)).first
id   = data["id"]
user = data["user"]["screen_name"]

tweet = data["text"].split(' ').map do |word|
  case word
  when /^@/
    twitter_link(word)
  when /^http/
    web_link(word)
  else
    word
  end
end * ' '

print "#{tweet} <a href=\"http://www.twitter.com/#{user}/statuses/#{id}\">∞</a>"