public static String doAddCart(int qty, int medicineId, int userId)
{
Cart cp = CartHandler.getCartMedicine(medicineId, userId);
int medicineStock = MedicineHandler.getMedicineById(medicineId).Stock;
if (qty < 1)
{
return("Qty must be more than 0");
}
if (cp == null)
{
if (qty > medicineStock)
{
return("Qty can't be more than available stock");
}
CartHandler.createCartMedicine(userId, medicineId, qty);
return("");
}
else
{
int currCartStock = cp.Quantity;
int requetedStock = currCartStock + qty;
if (requetedStock > medicineStock)
{
return("Qty must be less than or equals to medicine stocks");
}
CartHandler.updateCartMedicineQty(medicineId, userId, requetedStock);
return("");
}
}