Tool for watching class availability for non-waitlistable UCalgary classes

UCalgary Class Watcher.py

#!/usr/bin/env python3

import urllib.request
import xml.etree.ElementTree as ET

import time, random, math

import smtplib
from email.message import EmailMessage

# from IPython import embed # for debugging, requires pip install

# Configuration: Email Login
fromEmail = "ucalgary.class.notifier@mail.com"
fromEmailPassword = "asdfASDF1234"

# Configuration: Email Sending
watchList = {"2018 Spring|MATH 375":["<your email>"], "2018 Spring|ENCM 339":["<your email>"]}


# General Constant Declaration
semesterList = {"2018 Spring":"32183", "2018 Summer":"32185", "2018 Fall":"32187", "2019 Winter":"32191"}
requestString = "https://vsb.my.ucalgary.ca/getclassdata.jsp?term=%TermNumber%&course_0_0=%CourseName%&rq_0_0=null&t=%tCode%&e=%eCode%&nouser=1&_=%dateCode%"

def getOpenSpots(course):
	# Generate stupid request data to please server
	dateCode = str(int(time.time())) + str(random.randint(111, 999)) # get time since epoch, in ms (add the ms component to seconds randomly)
	tCode = (math.floor((int(dateCode)) / 60000)) % 1000
	eCode = tCode%3 + tCode%29 + tCode%42

	thisSemester = course.split("|")[0]
	thisCourse = course.split("|")[1]

	response = urllib.request.urlopen(requestString.replace("%TermNumber%", semesterList[thisSemester]).replace("%CourseName%", thisCourse.replace(" ", "-")).replace("%tCode%", str(tCode)).replace("%eCode%", str(eCode)).replace("%dateCode%", dateCode)).read()
	root = ET.fromstring(response)

	#print(response)

	if "Check your PC" in str(response):
		# An error has occured, return false and print an error
		print("PC time error.")
		return False

	OSReport = {} # example: {'LEC': 0, 'TUT': 0, 'LAB': 0}

	for block in root.iter("block"):
		# each block is a TUT0x or LEC0x or other entry
		disp = block.attrib["disp"] # TUT 01
		os = int(block.attrib["os"]) # number of open spots in TUT 01
		typeof = block.attrib["type"] # TUT or LEC or LAB

		#print(os)

		if typeof not in OSReport:
			OSReport[typeof] = os
		else:
			OSReport[typeof] += os

	return OSReport

def sendNotificationEmail(toAddress, courseName, OSReport):
	totalOS = sum([OSReport[i] for i in OSReport])
	detailsBreakdown = "\r\n".join(["\t- " + i + ": " + str(OSReport[i]) + " Open Spots" for i in OSReport])

	message = """
courseName has totalOS open spots (including labs, lectures, and tutorials)! Sign up immediately on http://my.ucalgary.ca or with the UCalgary Schedule Builder (https://vsb.my.ucalgary.ca/login.jsp) to get a spot in courseName.

Open spots in each course component:
detailsBreakdown""".replace("courseName", courseName).replace("totalOS", str(totalOS)).replace("detailsBreakdown", detailsBreakdown)

	body = "\r\n".join(["To: " + toAddress, "From: " + fromEmail, "Subject: Class Availability Notifier: " + courseName + " has an open spot!", '', message])

	server = smtplib.SMTP("smtp.mail.com", 587) # Port: 587
	server.ehlo()
	server.starttls()
	server.login(fromEmail, fromEmailPassword)

	try:
		server.sendmail(fromEmail, [toAddress], body)
		print("Message successfully sent to " + toAddress + " for spot in " + courseName)
	except:
		print("Error: Message not sent to " + toAddress + " for spot in " + courseName)

	server.quit()

#sendNotificationEmail(fromEmail, "Math 200", {'LEC': 1, 'TUT': 1, 'LAB': 2}) # Sample Run for Testing Mailer
#sendNotificationEmail(fromEmail, "Math 200", {}) # Sample Run for Testing Mailer

while 1:
	for course in watchList:
		courseOSReport = getOpenSpots(course)
		totalOS = sum([courseOSReport[i] for i in courseOSReport]) # Current used metric
		minOS = min([courseOSReport[i] for i in courseOSReport]) # Really the useful one because you need all course components

		if totalOS > 0:
			for toAddress in watchList[course]:
				sendNotificationEmail(toAddress, course, courseOSReport)
				print(course, str(courseOSReport))
		#print(courseOSReport)
		
		time.sleep(1)

	time.sleep(6)

#	embed() # Debug Console