def register()

in flaskr/auth.py [0:0]

• 24 lines of code
• 7 McCabe index (conditional complexity)

def register():
    """Register a new user.

    Validates that the username is not already taken. Hashes the
    password for security.
    """
    if request.method == "POST":
        username = request.form["username"]
        password = request.form["password"]
        db = get_db()
        error = None

        if not username:
            error = "Username is required."
        elif not password:
            error = "Password is required."
        elif (
            db.execute("SELECT id FROM user WHERE username = ?", (username,)).fetchone()
            is not None
        ):
            error = f"User {username} is already registered."

        if error is None:
            # the name is available, store it in the database and go to
            # the login page
            db.execute(
                "INSERT INTO user (username, password) VALUES (?, ?)",
                (username, generate_password_hash(password)),
            )
            db.commit()
            return redirect(url_for("auth.login"))

        flash(error)

    return render_template("auth/register.html")