exchange-rates.rb

I have this script in my cron, GBP exchange rates are awful so I want to change in the right time.

#!/usr/bin/env ruby
# encoding: utf-8

require "open-uri"

# Configuration.
URL = "http://www.cnb.cz/cs/financni_trhy/devizovy_trh/kurzy_devizoveho_trhu/denni_kurz.txt"
EMAIL = "stastny@101ideas.cz"

# Helpers.
def notify(email, rate)
  system("mail #{email} -s '1 GBP is #{rate} today!'")
end

# Main.
open(URL) do |stream|
  stream.read.match(/GBP\|(\d+),(\d+)/) do |match|
    rate = "#{match[1]}.#{match[2]}".to_f
    puts "~ 1 GBP is #{rate} today."
    notify(EMAIL, rate) if rate > 27
  end
end

Succeeded by https://gist.github.com/1499404