Project: Creating Functions to Register App Users

You are a junior developer working in a small start-up. Your managers have asked you to develop a new account registration system for a mobile app. The system must validate user input on the sign-up form before creating an account.

The previous junior developer wrote some helper functions that validate the name, email, and password. Use these functions to register users, store their data, and implement some error handling! These have been imported into the workspace for you. They will be a great help to you when registering the user, but first you have to understand what the function does! Inspect the docstrings of each of the helper functions: validate_name, validate_email and validate_password.

# Re-run this cell and examine the docstring of each function
from python_functions import validate_name, validate_email, validate_password, top_level_domains

print("validate_name\n")
print(validate_name.__doc__)
print("--------------------\n")

print("validate_email\n")
print(validate_email.__doc__) 
print("--------------------\n")

print("validate_password\n")
print(validate_password.__doc__)

# The top level domains variable is used in validate_email to approve only certain email domains
print(top_level_domains)

def validate_user(name, email, password):
    """Validate the user name, email and password.

    Args:
        name (string): Name that we're attempting to validate.
        email (string): Email address that we're attempting to validate.
        password (string): Password that we're attempting to validate.

    Returns:
        Boolean: Will return True if all validation checks pass

    Raises ValueError if validation fails.
    """

    # Check if name is not valid, if not raise value error.
    if validate_name(name) == False:
        raise ValueError("Please make sure your name is greater than 2 characters!")

    # Check if email is not valid, if not raise value error.
    if validate_email(email) == False:
        raise ValueError("Your email address is in the incorrect format, please enter a valid email.")

    # Check if password is not valid, if not raise value error.
    if validate_password(password) == False:
        raise ValueError("Your password is too weak, ensure that your password is greater than 8 characters, contains a capital letter and a number.")

    # If none of the if not statements are triggered, return True
    return True

# 2. Function to register validated user if all checks have passed
def register_user(name, email, password):
    """Attempt to register the user if they pass validation.

    Args:
        name (string): Name of the user
        email (string): Email address of the user
        password (string): Password of the user

    Returns:
        Dict: Return a dictionary with the user details

    Raises ValueError on missing arguments.
    """

    # Check if user input is valid by calling the validate user function
    if validate_user(name, email, password):
        # Create user object with details
        user = {
            "name": name,
            "email": email,
            "password": password
        }

        # Return user object
        return user

    # If validation fails, return False
    else:
        return False