A stupid script for watching the lollapalooza ticket page :)

Gemfile

source "https://rubygems.org"

gem "timers"
gem "nokogiri"

watcher.rb

#!/usr/bin/env ruby
require "bundler/setup"
require "open-uri"
require "digest/sha1"

Bundler.require

@last_signature = nil

def check_for_changes
  doc = Nokogiri::HTML(open("http://www.lollapalooza.com/tickets/"))
  element = doc.css("div.ticket-choice.tc-soon").first
  signature = Digest::SHA1.hexdigest(element.to_s)

  if @last_signature && @last_signature != signature
    puts "CHANGED!"
    raise "BOOSH"
  elsif @last_signature == nil
    puts "first run"
  else
    puts "no change"
  end
  @last_signature = signature
end

timers = Timers.new

check_for_changes
timers.every(60) { check_for_changes }
loop { timers.wait }