private void ValidateAge(User user)
{
if (user.Age < 18 || user.Age > 65)
{
throw new ArgumentOutOfRangeException("age out of range");
}
}
private void ValidateEmailAddress(User user)
{
if (!user.Email.IsEmail())
{
throw new ArgumentException("invalid email address");
}
}
private void ValidatePassword(User user)
{
var containsDigits = user.Password.Count(x => char.IsDigit(x)) >= 2;
var containsUpperCase = user.Password.Any(x => char.IsUpper(x));
var containsNonAlphaNumeric = user.Password.Any(x => !char.IsDigit(x) && !char.IsLetter(x) && !char.IsWhiteSpace(x));
if (user.Password.Length < 8 || !containsDigits || !containsUpperCase || !containsNonAlphaNumeric)
{
throw new ArgumentException("invalid user password");
}
}
private void Validate(User user)
{
if (StringExtensions.IsNullOrEmpty(user.UserName, user.Password, user.Email, user.FirstName, user.LastName))
{
throw new NullReferenceException("invalid user");
}
ValidatePassword(user);
ValidateEmailAddress(user);
ValidateAge(user);
}
public User CreateUser(string userName, string email, string password, string firstName, string lastName, int age)
{
var user = new User(userName, email, password, firstName, lastName, age);
Validate(user);
return user;
}
public bool VerifyTransaction(User user, ITransaction transaction)
{
_user = user;
return AccountIsValid() && SufficientFunds(transaction);
}