class InviteCodeValidator < ActiveModel::Validator
  def validate(user)

    user_invite_code = InviteCode.find_by_invite_code user.invite_code

    if not_existent?(user_invite_code)
      add_error_to_user("This is not a valid code", user)

    elsif has_no_uses_left?(user_invite_code)
      add_error_to_user("This code has already been used", user)

    # elsif count_greater_than_zero?(user_invite_code)
    #   add_error_to_user("This code has already been used", user)
    end
  end

  private
  def not_existent?(code)
    code == nil
  end

  def has_no_uses_left?(code)
    code.invite_count >= code.invite_max_uses
  end

  # def count_greater_than_zero?(code)
  #   code.invite_count > 0
  # end

  def add_error_to_user(error, user)
    user.errors[:invite_code] << error
  end
end