import datetime
# Global variables
users = []
current_id = 0
logged_in = False
current_user = None
# Create a user
def create_user(u_name, u_pass, u_email, u_role, u_active):
# Validate
if u_name == "" or u_pass == "" or u_email == "":
print("Error: Missing required fields")
return False
# Create user object with incremented ID
global current_id
current_id = current_id + 1
tmpuser = {
"id": current_id,
"username": u_name,
"password": u_pass, # Should encrypt passwords!
"email": u_email,
"role": u_role,
"active": u_active,
"created_at": datetime.datetime.now(),
"login_attempts": 0
}
# Add to users array
users.append(tmpuser)
print(f"User created: {u_name}")
return True
# Find a user by username
def find_user_by_username(username):
for i in range(len(users)):
if users[i]["username"] == username:
return users[i]
return None
# Find a user by email
def find_user_by_email(email):
for i in range(len(users)):
if users[i]["email"] == email:
return users[i]
return None
# Find a user by ID
def find_user_by_id(id):
for i in range(len(users)):
if users[i]["id"] == id:
return users[i]
return None
# Authenticate a user
def authenticate(username, password):
global logged_in, current_user
user = find_user_by_username(username)
if not user:
print(f"User not found: {username}")
return False
if not user["active"]:
print(f"User account is disabled: {username}")
user["login_attempts"] = user["login_attempts"] + 1
return False
if user["password"] == password:
logged_in = True
current_user = user
user["login_attempts"] = 0
print(f"User authenticated: {username}")
return True
else:
user["login_attempts"] = user["login_attempts"] + 1
print(f"Invalid password for: {username}")
# Lock account after 3 failed attempts
if user["login_attempts"] >= 3:
user["active"] = False
print(f"Account locked due to too many failed attempts: {username}")
return False
# Update user profile
def update_profile(id, new_email, new_password):
user = find_user_by_id(id)
if not user:
print(f"User not found: {id}")
return False
# Check if user is logged in
if not logged_in or current_user["id"] != id:
print("Unauthorized profile update attempt")
return False
# Update fields
if new_email:
user["email"] = new_email
if new_password:
user["password"] = new_password
print(f"Profile updated for: {user['username']}")
return True
# Delete user - Admin only
def delete_user(id):
# Check if admin
if not logged_in or current_user["role"] != 'admin':
print("Unauthorized deletion attempt")
return False
# Find user index
index = -1
for i in range(len(users)):
if users[i]["id"] == id:
index = i
break
if index == -1:
print(f"User not found: {id}")
return False
# Remove user
deleted_user = users.pop(index)
print(f"User deleted: {id}")
return True
# Get all users - Admin only
def get_all_users():
# Check if admin
if not logged_in or current_user["role"] != 'admin':
print("Unauthorized request for user list")
return []
return users
# Log out
def logout():
global logged_in, current_user
if logged_in:
current_user = None
logged_in = False
print("User logged out")
return True
print("No user logged in")
return False
# Function to print user info
def print_user_info(user):
print(f"ID: {user['id']}, Username: {user['username']}, Email: {user['email']}, Role: {user['role']}, Active: {user['active']}")
# Test functionality
if __name__ == "__main__":
create_user("admin", "admin123", "admin@example.com", "admin", True)
create_user("john", "password123", "john@example.com", "user", True)
create_user("jane", "secret456", "jane@example.com", "user", True)
authenticate("admin", "admin123")
print("\nAll users:")
for user in get_all_users():
print_user_info(user)
update_profile(1, "admin@newdomain.com", None)
logout()
authenticate("john", "wrong") # First attempt
authenticate("john", "wrong") # Second attempt
authenticate("john", "wrong") # Third attempt - account locks
authenticate("john", "password123") # Should fail now
authenticate("admin", "admin123")
delete_user(3) # Delete jane
print("\nRemaining users:")
for user in get_all_users():
print_user_info(user)
