A quick and dirty way to check for new courses on the (new) P2PU site.

newcourses.rb

#!/usr/bin/ruby

require 'net/smtp'

=begin
1. Download the file.
2. Make sure it is executable by running:
$ chmod +x newcourses.rb
3. Any time you want to check for new courses, just run:
$ ./newcourses.rb
=end

url = "http://new.p2pu.org/en/groups/"

File.exist?("courselist.txt")? old_list = File.read("courselist.txt") : old_list = ""

dir = ARGV[0]
page = %x[curl --silent #{url}]
courses = []
new_courses = []
page.each{|line|
	course = line[/\/en\/groups\/[^"]*\//]
	if course
		courses << course 
		new_courses << course unless old_list[course]
	end
}

unless new_courses.empty?
	# append new courses to the saved courselist
	new_courses = new_courses.uniq
	File.open("courselist.txt", "a") {|f|
		new_courses.each{|c| f.puts c }
	}

	# send an email with the changes
	message = <<-MESSAGE_END
From: you@example.com
To: them@example.com
MIME-Version: 1.0
Content-type: text/html
Subject: New Courses on new.P2PU.org

<h1>New Courses Since Yesterday</h1>

	MESSAGE_END

	new_courses.each{|c| 
		course_url = "http://new.p2pu.org#{c}"
		message << "<a href=\"#{course_url}\">#{course_url}</a><br>\n"
	}

	Net::SMTP.start('localhost') do |smtp|
		smtp.send_message message, 'you@example.com', 
		'them@example.com'
	end
end