automate to create google alert

google-alert.rb

# -- coding: utf-8

require "rubygems"
require "grill"

Grill.implant <<-G
source :rubygems

gem "masque"
gem "nokogiri"
G

m = Masque.new(:driver => :webkit)
m.run do
  visit "http://www.google.co.jp/alerts/manage"
  within('#gaia_loginform') do
    fill_in "Email", :with => "your@gmail.com"
    fill_in "Passwd", :with => "PASSWORD"
  end
  find('#signIn').click

  visit "http://www.google.co.jp/alerts"
  keyword = ARGV.first
  {
    "q" => keyword,
    "e" => "feed",
    "t" => 1, # news:1, all:7
    "f" => 1, # unknown
    "l" => 1, # all or recent
  }.each_pair do |k,v|
    find("input[name=#{k}]").set v
  end
  find('#create_alert').click

  wait_until(5) do
    current_url["/alerts/manage"]
  end
  doc = Nokogiri::HTML.parse(page.body)
  a = doc.at_xpath(%Q'//a[contains(@href, "#{URI.encode_www_form_component keyword}")]/ancestor::tr//a[contains(@href, "/alerts/feeds/")]')
  puts a.attributes["href"].to_s
end