FH Aachen Grade checker for QIS with telegram notifications

check_grades.py

###
# FH Aachen Selenium Grade Checker with Telegram Send for notifications
# Description: Setup telegram-send first with pip3 install telegram_send and then in bash: telegram-send --configure
#   Automate with cron e.g.: crontab -e and enter 0 */12 * * * /usr/bin/python3 /path/to/check_grades.py For every 12h.
# Author: Eric Trenkel (@bostrot)
# License: MIT
###

from selenium import webdriver
from selenium.webdriver.chrome.options import Options
import telegram_send

chrome_options = Options()
chrome_options.add_argument('--headless')
chrome_options.add_argument('--no-sandbox')
chrome_options.add_argument('--disable-dev-shm-usage')

driver = webdriver.Chrome(options=chrome_options)

# go to qis site
def openSite():
    driver.get('https://qis.fh-aachen.de/')

# authenticate
def login():
    driver.find_element_by_id('asdf').send_keys('USER')
    driver.find_element_by_id('fdsa').send_keys('PASSWORD')
    driver.find_element_by_id('loginForm:login').click()

# navigate to grades
def navToGrades():
    driver.find_element_by_xpath('//*[contains(text(), \'Notenspiegel\')]').click()
    driver.find_element_by_css_selector('a[title*=\'Informatik\']').click()

# get credits
def getCredits():
    ects = driver.find_element_by_xpath('//*[contains(text(), \'ECTS-Konto Sem 1-5 IBP\')]')
    ects = ects.find_element_by_xpath('..') # parent
    ects = ects.find_elements_by_css_selector('td')

    if ects[5].text != '47':
        print('ECTS changed to ' + ects[5].text)

# print an array
def printTable(element):
    moduleText = 'New grade:\n'
    for i in range(len(element)):
        print(element[i].text)
        moduleText += element[i].text + '\n'
    try:
        telegram_send.send(messages=[moduleText])
    except Exception as e:
        print('Unable to send', e)

# check for specific modules
def checkModule():
    tables = driver.find_elements_by_css_selector('tr')
    f = open('cache.txt', 'r')
    cache = f.read()
    for i in range(len(tables)):
        table = tables[i].find_elements_by_css_selector('td')
        if (len(table) < 1):
            continue
        table = table[0]
        if table.text not in cache:
            print('Found new module:\n')
            temp = table.find_element_by_xpath('..').find_elements_by_css_selector('td')
            printTable(temp)
            f = open('cache.txt', 'a')
            f.write(table.text + '\n')
            f.close()


# save screenshot
def createScreenshot():
    driver.get_screenshot_as_file('screen.png')

# main
try:
    openSite()
    login()
    navToGrades()
    getCredits()
    checkModule()
    driver.quit()
except Exception as e:
    print(e)
finally:
    driver.quit()