ABN Amro credit card balance checker

balance.rb

#! /usr/bin/env ruby

# Password can be fetched from Keychain
# Password should be stored with the same username, and application name 'abnamro-credit-card'

HOST = 'https://creditcards.abnamro.nl'
LOGIN_URL =      HOST + '/ABN_AMRO_Consumer/Login.do'
LOGIN_POST_URL = HOST + '/ABN_AMRO_Consumer/ProcessLogin.do'
ENGLISH_URL =    HOST + '/ABN_AMRO_Consumer/ChangeLanguage.do?localeID=English&locationID=Transactions'

USERNAME = 'your.username'
PASSWORD = nil

require 'rubygems'
require 'mechanize'

# keychain
# blog post: http://blog.slashpoundbang.com/post/1521530410/accessing-the-os-x-keychain-from-ruby
class KeyChain
  def self.method_missing(meth, *args)
    run args.unshift(meth)
  end

  def self.find_generic_password(*args)
    output = quiet args.unshift('find-generic-password', '-g')
    output[/^password: "(.*)"$/, 1]
  end

private

  def self.run(*args)
    `security #{args.join(' ')}`
  end
  
  def self.quiet(*args)
    run args.unshift('2>&1 >/dev/null')
  end
end

password = PASSWORD

if nil == password
  # try to access keychain to recover password
  password = KeyChain.find_generic_password '-s', 'abnamro-credit-card', '-a', '"joshua.may"'
end

abort 'ERROR: Password cannot be retrieved from keychain!' if password.nil?

agent = Mechanize.new { |agent|
  agent.user_agent_alias = 'Mac Safari'
}

login_page = agent.get(LOGIN_URL)

login_form = login_page.form('logonForm')
login_form.username = USERNAME
login_form.password = password

account_page = agent.submit(login_form)
english_page = agent.get(ENGLISH_URL)

english_page.search('table.subTile').search('td.normaltext').search('tr').map { |tr|
  key = tr.search('td')[0].text
  value = tr.search('td')[1].text

  puts "#{key}: #{value}"
}