Quick and dirty script to watch prices on refurbished Mac Mini on Apple.ca. Sends an email (via gmail) when it finds one under the threshold price. Will most likely set it up in a cron

mac-mini-price-watcher.rb

require 'gmail'
require 'open-uri'
require 'nokogiri'

product_url = "http://store.apple.com/ca/browse/home/specialdeals/mac/mac_mini"
username = 'GMAIL USER NAME'
password = 'PASSWORD, DUH!'
email = "[email protected]"
threshold = 600 # How much you would like to spend

def notify(username, password, email, product_url)
  # TODO: Check to see if we already sent an email today O_o
  Gmail.new(username, password) do |gmail|
    gmail.deliver do
      to email
      from email
      subject "Found one cheap enough"
      body product_url
    end
  end
end

doc = Nokogiri::HTML(open(product_url))
doc.xpath("//span[@itemprop='price']").each do |element|
  price = element.inner_html.strip.gsub '$', ''
  if not price.empty?
    if price.to_i <= threshold
      puts "found once at $#{price} that is less than $#{threshold}"
      notify(username, password, email, product_url)
      break;
    end
  end
end