umd-dining-balance

#!/usr/bin/env ruby
# frozen_string_literal: true

#  umd-dining-balance.rb
#  Author: William Woodruff
#  ------------------------
#  Fetch UMD dining plan balance data for a given student, by Directory ID.
#  Uses Mechanize and Nokogiri.
#  ------------------------
#  This code is licensed by William Woodruff under the MIT License.
#  http://opensource.org/licenses/MIT

require "mechanize"
require "nokogiri"

URL = "https://login.umd.edu/cas/login?service=http://dsonline.umd.edu/dsbalance/"

abort("Usage: #{$PROGRAM_NAME} <username> <password>") if ARGV.length != 2

username, password = ARGV.shift(2)
mech = Mechanize.new
page = mech.get(URL)
form = page.forms.first

form.field_with(name: "username").value = username
form.field_with(name: "password").value = password

html = Nokogiri::HTML(mech.submit(form).body)

abort("Fatal: Failed to login through CAS. Check your credentials.") if html.css("table").empty?

table = html.css("table").first.css("table")[1]

output = table.css("tr").map do |r|
  r.css("td").map(&:text).map(&:lstrip).join
end.reject { |e| e == "\u00A0" }

output.each { |e| puts e.sub(" : ", ": ") }