yesorno.rb

require 'rubygems'
require 'bundler'
Bundler.setup
Bundler.require
require 'open-uri'

def latest_tweet(screen_name)
  screen_name = screen_name[0,15]
  begin
    json = open("https://api.twitter.com/1/statuses/user_timeline.json?screen_name=#{screen_name}&count=1").read
    tweet = JSON.parse(json)[0]
    text = tweet['text']
    @tweet_url = "https://twitter.com/#{screen_name}/status/#{tweet['id_str']}"
    # @tweet_time = Time.parse(tweet['created_at'])
    text
  rescue
    'MAYBE'
  end
end

get '/' do
  @screen_name = ENV["SCREEN_NAME"] || request.host.split('.').first
  yes_or_no
end

get '/:screen_name' do
  @screen_name = params[:screen_name]
  yes_or_no
end

def yes_or_no
  cache_control :public, :max_age => 30
  @answer = latest_tweet(@screen_name)
  @answer = @answer =~ /yes/i ? 'YES' : 'NO' unless @answer == 'MAYBE'
  haml :index
end

__END__

@@ layout
%html
  %head
    %title #{@screen_name}?
    :css
      * { margin: 0 ; padding: 0 }
      .time { color: #aaa; font-size: 12px }
      body { margin-top: 80px; text-align:center; font-family: Helvetica, Arial, sans-serif }
      h1 { margin-bottom: 10px; font-size: 48pt }
      h1, h1 a { color: #000; text-decoration: none }
  %body
    = yield

@@ index
%h1
  %a{ :href => @tweet_url }
    = @answer