Bürgerbot: Refreshes the Berlin Bürgeramt page until an appointment becomes available, then notifies you.

buergerbot.rb

#!/usr/bin/env ruby
require 'watir'
require 'notify'

def log (message) puts "  #{message}" end
def success (message) puts "+ #{message}" end
def fail (message) puts "- #{message}" end
def notify (message)
  success message.upcase
  Notify.notify 'Burgerbot', message
rescue StandardError => e
end


print "Paste URL: "
url = gets.strip

def appointmentAvailable? (b)
  puts '-'*80
  log 'Trying again'
  b.goto url
  log 'Page loaded'
  link = b.element css: '.calendar-month-table:first-child td.buchbar a'
  if link.exists?
    link.click
    notify 'An appointment is available.'
    system('paplay /usr/share/sounds/freedesktop/stereo/message-new-instant.oga')
    log 'Enter y to keep searching or anything else to quit.'
    return gets.chomp.downcase != 'y'
  else
    fail 'No luck this time.'
    return false
  end
rescue StandardError => e
  fail 'Error encountered.'
  puts e.inspect
  return false
end

b = Watir::Browser.new
until appointmentAvailable? b
  log 'Sleeping.'
  sleep 45
end