update_name.rb

require 'twitter'
require 'pp'

client = Twitter::REST::Client.new do |config|
  config.consumer_key = 'CK'
  config.consumer_secret = 'CS'
  config.access_token = 'AT'
  config.access_token_secret = 'AS'
end

myId = client.settings.screen_name
re = Regexp.new "(.*)\\(@#{myId}\\)"

mentions = client.mentions
sinceId = mentions[0].id
loop do
  name = nil
  mentions.each do |mention|
    text = mention.text
    if text =~ re
      name = $1
      print "matched", text, "\n"
      puts name
      if name.length <= 20
        break
      end
    end
  end

  if name and name.length <= 20
    client.update_profile(:name => name)
    status = "[update_name] #{name}"
    client.update(status)
    puts status
  end
  
  sleep 60

  mentions = client.mentions_timeline(:since_id => sinceId)
  sinceId = mentions[0].id if mentions.size > 0
end