import re
import webbrowser
import requests
import PyPDF2
import io

url = input("Enter the study guide URL: ")
url_raw = requests.get(url).content
url_contents = ''
with io.BytesIO(url_raw) as open_pdf_file:
    read_pdf = PyPDF2.PdfReader(open_pdf_file)
    for page_number in range(len(read_pdf.pages)):
        page = read_pdf.pages[page_number]
        url_contents += '\n' + page.extract_text()

for match in re.finditer(r'(S|F)\d\d(E\d|F\d|FE)#\d\d?', url_contents):
    match = match.group()
    webbrowser.open(f'https://www.math.purdue.edu/php-scripts/courses/oldexams/serve_file.php?file=26100{match[3:5]}-{match[0]}20{match[1:3]}.pdf')
    webbrowser.open(f'https://www.math.purdue.edu/php-scripts/courses/oldexams/serve_file.php?file=Ans-26100{match[3:5]}-{match[0]}20{match[1:3]}.pdf')
    if requests.get(f'https://www.math.purdue.edu/php-scripts/courses/oldexams/serve_file.php?file=Sol-26100{match[3:5]}-{match[0]}20{match[1:3]}.pdf').status_code != 404:
        webbrowser.open(f'https://www.math.purdue.edu/php-scripts/courses/oldexams/serve_file.php?file=Sol-26100{match[3:5]}-{match[0]}20{match[1:3]}.pdf')