A ruby class that returns a Hash of ITK (itcollege.ee) student's grades.

grade.rb

#!/usr/bin/env ruby

require "itk_grades"

# Create instance and save login data
ITK = ITKGrades.new("user", "pass")

# Fetch & scrape grades from ÕIS.
ITK.fetch

#ITK.grades # Returns a hash of all grades

# Print all grades
ITK.print

ITKGrades.rb

#!/usr/bin/env ruby

# Estonian IT College grade sheet scraper
# A dirty version for just getting the job done.
# Maybe prettify in the future.
#
# Version 1.1
# Author "Ando Roots" <anroots@itcollege.ee>
# Created 29.02.2012
# Licence Apache v2 http://www.apache.org/licenses/LICENSE-2.0.html


require "rubygems"
require "mechanize"

# Scrapes student grades from ITK ÕIS
# and returns a hash in the format
# {
# 	subject_name => {
#		grade_name => grade
#	},
# }
#
# Example usage:
# 
# ITK = ITKGrades.new("MY_USERNAME", "MY_PASSWORD") # Instance and login
# ITK.fetch # Actually fetch and scrape the grades
# ITK.print # Print out the hash of my grades
#
class ITKGrades

	@@login_url = "https://itcollege.ois.ee/et/"

	@username
	@password

	@grades

	# Accessor for grades
	def grades
		@grades
	end
	
	# Save login data
	def initialize(username, password)
		@username = username
		@password = password
	end

	# Get HTML for the grades page
	def get_grades_page

		agent = Mechanize.new
		page = agent.get(@@login_url)

		login_form = page.form

		login_form.username = @username
		login_form.pw = @password

		page = agent.submit(login_form, login_form.button)

		return agent.page.link_with(:text => 'Minu hinded').click
	end

	# Scrape grades into grades hash from the grades page
	def scrape_grades(page)
		
		@grades = {}
		grade_rows = page.search('#mainWindow table.data tr')
		current_subject = nil;
		
		grade_rows.each do |row|
			if row.at_css('th') then
				current_subject = row.search('th').text 
				@grades[current_subject] = {}
				next
			end

			paper = row.search('td:first').text.gsub(/[-\t]/, '').strip
			grade = row.search('td:last').text.gsub(/[-\t]/, '').strip
	
			if paper.empty? || grade.empty? then
				next
			end
	
			@grades[current_subject][paper] = grade
	
		end
	end

	# Fetch grades. Call this first!
	def fetch
		scrape_grades(get_grades_page)
		return @grades
	end

	# Print fetched grades
	def print

		if (@grades.length == 0)
			print "No grades"
		end

		# Go over each grade
		@grades.each {|subj, grades| 
	
			# Print out only subjects that have at least one grade
			if grades.length > 0 then
				puts "== " + subj + " ==\n" # Print subj name
	
				# For each grade in that subject...
				grades.each {|task,grade|
					puts "\t#{task}: #{grade}\n"
				}
			end
		}	
	end

end