validatePassword static method

Implementation

static String? validatePassword(String? value) {
  if (value == null || value.isEmpty) {
    return 'Password is required.'; // Return error message if password is empty.
  }

  // Check for minimum password length
  if (value.length < 6) {
    return 'Password must be at least 6 characters long.'; // Return error message for short passwords.
  }

  // Check for uppercase letters
  if (!value.contains(RegExp(r'[A-Z]'))) {
    return 'Password must contain at least one uppercase letter.'; // Return error if no uppercase letter is found.
  }

  // Check for numbers
  if (!value.contains(RegExp(r'[0-9]'))) {
    return 'Password must contain at least one number.'; // Return error if no number is found.
  }

  // Check for special characters
  if (!value.contains(RegExp(r'[!@#$%^&*(),.?":{}|<>]'))) {
    return 'Password must contain at least one special character.'; // Return error if no special character is found.
  }

  return null; // Return null if password is valid.
}