pattern-project

This is a simple console-based user authentication system in Python.
It supports registration, login, password reset, user roles (admin/user), and account lockout after multiple failed login attempts.
User data is stored persistently in a users.json file.

Design Patterns Used

This project demonstrates the application of classic design patterns and principles:

• Factory Method (GoF):
  Used in UserFactory to create different user types (Admin, UserImpl) based on input.
• Strategy (GoF):
  Used for authentication methods (PasswordAuth, OAuthAuth), enabling extensible login options.
• Singleton (GoF):
  Session class ensures only one session instance manages the logged-in user.
• SOLID Principles:
  Single Responsibility (separation of concerns: authentication, session, user management), Open/Closed (easy to extend auth/user types), Liskov Substitution, etc.
• GRASP Patterns:
  Creator (UserManager creates and manages users), Controller (main() as command controller).