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parse.rb
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parse.rb
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# Must have these gems installed:
require 'lingua'
require 'nokogiri'
require 'net/https'
require 'open-uri'
require 'openssl'
require 'watir-webdriver'
require 'headless'
require 'io/console'
require 'rubygems'
require 'active_record'
require 'cgi'
require 'uri'
require 'bigdecimal'
require 'bigdecimal/util'
ActiveRecord::Base.establish_connection(
:adapter => 'sqlite3',
:database => 'db/development.sqlite3')
class ParseResult < ActiveRecord::Base
attr_accessible :name, :user_id, :activity, :fog, :kincaid, :flesch, :course_path, :ta_id
end
headless = Headless.new
headless.start
BROWSER_SLEEP = 4
CLASS_PATH = 'proglang-2012-001'
SIGNIN_URL = 'https://www.coursera.org/account/signin'
FORUM_HOME_URL = "https://class.coursera.org/#{CLASS_PATH}/forum/index"
AUTH_URL = "https://class.coursera.org/#{CLASS_PATH}/auth/auth_redirector?type=login&subtype=normal"
activity = 0
fog = 0
pending = true
def signin(email, password)
# Open a browser to log user in
browser = Watir::Browser.new(:phantomjs)
# Navigate to Sign In page
browser.goto(SIGNIN_URL)
sleep(BROWSER_SLEEP)
# Fill in user info
browser.text_field(:id => 'signin-email').value = email
browser.text_field(:id => 'signin-password').value = password
browser.button(:text => 'Sign In').click
sleep(BROWSER_SLEEP)
# Navigate to auth page
browser.goto(AUTH_URL)
sleep(BROWSER_SLEEP)
return browser
end
def get_threads(browser)
# Get links of each sub forum
forum_links = get_links_from_page(browser, FORUM_HOME_URL, 'forum_id')
# Get links of every thread
threads = []
forum_links.each do |link|
threads << get_links_from_page(browser, link, 'thread_id')
sleep(BROWSER_SLEEP / 4)
end
return threads
end
def get_links_from_page(browser, page, link_frag)
puts "Indexing " << page.to_s
browser.goto(page)
sleep(BROWSER_SLEEP / 4)
browser.links.each do |link|
link.href.to_s
end
#matching_links = browser.links.select{|link| link.href.include? link_frag}.collect{|link| link.href}
matching_links = browser.links.collect{|link| link.href}.select{|href| href.include? link_frag}
end
def rank_users(browser, threads)
users = {}
ids = []
threads.flatten!
total_threads = threads.size
threads.each_with_index do |thread, index|
puts "[" << index.to_s << "/" << total_threads.to_s << "] Analyzing " << thread.to_s
browser.goto(thread)
posts = browser.divs(:class => "course-forum-post-view-container")
posts.each do |post|
student_link = post.links.select{|link| link.href.include? "user_id"}[0]
if student_link
post_text_div = post.divs(:class => "course-forum-post-text")[0]
post_text = ""
if post_text_div.ps.length > 0
post_text_div.ps.each do |p|
post_text << p.text
end
else
post_text = post_text_div.text
end
report = Lingua::EN::Readability.new(post_text.to_s)
report.inspect
username = student_link.text.titleize
id = CGI::parse(URI.parse(student_link.href).query)["user_id"][0]
if users.has_key?(id)
user = users[id]
else
user = {}
user["name"] = username
ids << id
user["activity"] = 0
user["fogs"] = 0
user["kincaids"] = 0
user["fleschs"] = 0
user["fog"] = 0
user["kincaid"] = 0
user["flesch"] = 0
user["id"] = id
end
if !report.fog.nan?
user["fog"] = user["fog"] + report.fog
user["fogs"] = user["fogs"] + 1
end
if !report.kincaid.nan?
user["kincaid"] = user["kincaid"] + report.kincaid
user["kincaids"] = user["kincaids"] + 1
end
if !report.flesch.nan?
user["flesch"] = user["flesch"] + report.flesch
user["felschs"] = user["fleschs"] + 1
end
user["activity"] = user["activity"] + 1
users[id] = user
end
end
sleep(BROWSER_SLEEP / 4)
end
ids.each do |id|
user = users[id]
p = ParseResult.new
p.name = user["name"]
p.user_id = id
p.activity = user["activity"]
if user["fogs"] != 0
p.fog = user["fog"].to_i / user["fogs"]
end
if user["kincaids"] != 0
p.kincaid = user["kincaid"].to_i / user["kincaids"]
end
if user["fleschs"] != 0
p.flesch = user["flesch"].to_i / user["fleschs"]
end
p.course_path = CLASS_PATH
p.save
end
end
#print "Coursera email: "
#email = gets.chomp
#print "Coursera password: "
#password = STDIN.noecho(&:gets).chomp
email = ""
password = ""
browser = signin(email, password)
threads = get_threads(browser)
rank_users(browser, threads)
browser.close