public function applyPromotion($code, $auto = false)
{
$code = strtoupper($code);
$promotion = new Cart66Promotion();
if ($promotion->validateCustomerPromotion($code)) {
$this->clearPromotion();
Cart66Session::set('Cart66Promotion', $promotion);
Cart66Session::set('Cart66PromotionCode', $code);
} else {
$this->clearPromotion();
if ($auto == false) {
Cart66Session::set('Cart66PromotionErrors', $promotion->getErrors());
}
}
}
