controlled.rb

post '/value' do
  screen_name = params[:screen_name]
  if screen_name && screen_name != ""
    @info = Twitter.get('/1/users/show.json', :query => { :screen_name => screen_name })
    if @info['error']
      redirect "/?failure=There was an error retrieving your account information. Twitter says: #{info['error']}."
    else
      # Since we've now successfully retrieved information on a user account, we'll either look up or save this user in our
      # database.
      person = Person.first(:screen_name => screen_name)
      unless person
        person = Person.new(
          :screen_name => screen_name, 
          :name => @info['name'], 
          :joined_twitter_at => DateTime.parse(@info['created_at'])
        )
      end
      # These attributes can change over time
      person.followers_count, person.statuses_count, person.profile_image_url = @info['followers_count'], @info['statuses_count'], @info['profile_image_url']
      person.save
      redirect "/w/#{person.screen_name}"
    end    
  else
    redirect "/?failure=Please enter a Twitter username to start the valuation process."
  end
end

# The shorter the url, the better for Twitter
get '/w/:screen_name' do
  @person = Person.first(:screen_name => params[:screen_name])
  @page_title = @person.name
  haml :person
end