This is a library for polling Liberty's ASIST portal (hence the name).

README.markdown

Asistant

To get this set up you have to run custom versions of the mechanize and twiliolib gems. Unfortunately, some SSL errors and issues with Liberty's login redirect sequence forced me to hack the libraries. Hopefully I can get something "official" looking to get it pulled into the main repository, but for now, install it from my repositories.

Generic Ruby Setup

sudo apt-get install ruby

Generic RubyGems Setup

# (do not use apt-get)
mkdir ~/sources; cd ~/sources
wget http://production.cf.rubygems.org/rubygems/rubygems-1.3.7.tgz
tar -xzvf rubygems-1.3.7.tgz
cd rubygems-1.3.7
sudo ruby setup.rb

Mechanize Setup

mkdir ~/sources; cd ~/sources
git clone git://github.com/benmanns/mechanize.git
cd mechanize
gem build mechanize.gemspec
gem install mechanize

Twilio Setup

mkdir ~/sources; cd ~/sources
git clone git://github.com/benmanns/twilio-ruby.git
cd twilio-ruby
rake gem
cd pkg
gem install twiliolib

Now, just run ruby asistant.rb

asistant.rb

require 'rubygems'
require 'yaml'
begin
  require 'mechanize'
rescue LoadError
  puts 'This library requires the mechanize gem. You must install it from git://github.com/benmanns/mechanize.git'
end
begin
  require 'twiliolib'
rescue LoadError
  puts 'This library requires the twiliolib gem. You must install it from git://github.com/benmanns/twilio-ruby.git'
end

config = YAML.load_file('./config.yml')

previous_remaining = -1
count = 0
loop do
  begin
    agent = Mechanize.new
    agent.follow_meta_refresh = true

    page = agent.get 'https://www.liberty.edu/index.cfm?PID=13627'
    login_form = page.form_with :name => 'loginform'
    login_form.username = config['asist']['username']
    login_form.password = config['asist']['password']

    page = login_form.submit

    page = page.link_with(:text => 'Student').click

    page = page.link_with(:text => 'Registration').click

    page = page.link_with(:text => 'Look Up Classes').click
    term_form = page.forms.select { |f| f.field_with(:name => 'p_term') }.first
    p_term = term_form.field_with(:name => 'p_term')
    p_term.value = p_term.options.select { |o| o.text =~ /\ASpring 2011/ }.first.value

    page = term_form.submit

    # After this you can go through and search for the class. I opted to enter the URL manually because it made things simpler and less error-prone.
    # Women's Literature:
    # page = agent.get 'https://selfservice.liberty.edu/livedata/bwckschd.p_disp_detail_sched?term_in=201120&crn_in=20795', [], 'https://selfservice.liberty.edu/livedata/bwckschd.p_disp_listcrse?term_in=201120&subj_in=ENGL&crse_in=438&crn_in=20795'
    # Philosophy (intensive):
    page = agent.get 'https://selfservice.liberty.edu/livedata/bwckschd.p_disp_detail_sched?term_in=201120&crn_in=30160', [], 'https://selfservice.liberty.edu/livedata/bwckschd.p_disp_listcrse?term_in=201120&subj_in=PHIL&crse_in=201&crn_in=30160'

    table = page.search('table.datadisplaytable').select { |t| t.attributes['summary'].value == 'This layout table is used to present the seating numbers.' }.first
    remaining = table.children.search('td.dddefault').last.children.first.text.to_i

    if previous_remaining != remaining
      account = Twilio::RestAccount.new(config['twilio']['sid'], config['twilio']['token'])
      data = {
        'From' => config['twilio']['from'],
        'To' => config['twilio']['to'],
        'Body' => "There are #{remaining} spots remaining in your class.",
      }
      response = account.request("/#{config['twilio']['version']}/Accounts/#{config['twilio']['sid']}/SMS/Messages", 'POST', data, {:ssl_verify_mode => OpenSSL::SSL::VERIFY_NONE})
      previous_remaining = remaining
    end
    count += 1
    puts "Ran #{count} times - #{remaining} spots remaining."
    sleep 1
  rescue Exception
    redo # On exceptions (page not found, internet down, etc) just restart process.
  end
end

config.yml

asist:
  username: my_liberty_username
  password: my_liberty_password
twilio:
  sid: my_twilio_sid
  token: my_twilio_token
  version: 2010-04-01
  from: my_sms_from_number
  to: my_sms_to_number