gistfile1.builder

#!/usr/bin/ruby

require 'rubygems'
require 'open-uri'

FILE_NAME = '/home/beno/projects/training_checker/seats_left.txt'

previous_seats_left = File.open(FILE_NAME).read

doc = open('https://training.thoughtbot.com/courses/12-vim-for-rubyists/registrations/new').read
seats_left = doc.scan(/\d\d seats/).first.split(' ').first

if seats_left != previous_seats_left
  File.open(FILE_NAME, 'w') { |f| f.write(seats_left) }
  %x(mail -s "New reg!" [email protected] < #{FILE_NAME})
end