Проверка авторизации - Общие вопросы и ошибки

        $user = JFactory::getUser();
        if ($user->id){
            $adv_user = JSFactory::getUserShop();
        }else{
            $adv_user = JSFactory::getUserShopGuest();
        }
        $usergroup_id = $adv_user->usergroup_id;

 if ($quantity && $this->product_is_add_price){
		$my_counter = 5;
		$user = JFactory::getUser();
        if ($user->id){
            $adv_user = JSFactory::getUserShop();
        }else{
            $adv_user = JSFactory::getUserShopGuest();
        }
        $usergroup_id = $adv_user->usergroup_id;
		
            foreach($this->product_add_prices as $key=>$value) {
				
                //if ( ($quantity >= $value->product_quantity_start && $quantity <= $value->product_quantity_finish) ||  ($quantity >= $value->product_quantity_start && $value->product_quantity_finish==0) ){
					if($usergroup_id == $my_counter) {
                    $this->product_price_calculate = $value->price;
                    break;}
					$my_counter--;
                //} 
            }
        }

$usergroup_id = JFactory::getUser()->guest ? JSFactory::getUserShopGuest()->usergroup_id:  JSFactory::getUserShop()->usergroup_id;