ENHANCEMENT: Externalize hardcoded email domains into configuration

[Senthil455]

Description

Student email domains (@student.annauniv.edu) and faculty email domains (@faculty.annauniv.edu) are hardcoded in app.py. This makes the application institution-specific and prevents easy deployment for other educational organizations.

Location

app.py:37-39

if not (email.endswith('@student.annauniv.edu') or email.endswith('@faculty.annauniv.edu')):
    flash('Only @student.annauniv.edu and @faculty.annauniv.edu emails are allowed!', 'danger')
    return redirect(url_for('register'))

Impact

• Cannot deploy for other institutions without modifying source code
• Forking requires code changes to use different domains
• Configuration should be externalized for flexibility

Recommended Enhancement

1. Move domains to environment variables:

   STUDENT_EMAIL_DOMAIN = os.environ.get('STUDENT_EMAIL_DOMAIN', '@student.annauniv.edu')
   FACULTY_EMAIL_DOMAIN = os.environ.get('FACULTY_EMAIL_DOMAIN', '@faculty.annauniv.edu')
   ALLOWED_DOMAINS = os.environ.get('ALLOWED_DOMAINS', '').split(',') or [
       STUDENT_EMAIL_DOMAIN,
       FACULTY_EMAIL_DOMAIN
   ]

2. Update the validation to use configurable domains:

   if not any(email.endswith(domain) for domain in ALLOWED_DOMAINS):
       flash(f'Only emails from {", ".join(ALLOWED_DOMAINS)} are allowed!', 'danger')
       return redirect(url_for('register'))

3. Allow administrators to configure allowed domains through an admin settings page