public static bool isProductOkToPurchase(User currentUser, Product currentProduct, int quantityToPurchase)
{
bool okToPurchase = true;
if (!currentUser.IsUserBalanceSufficient(currentProduct, quantityToPurchase))
{
UI.printInsufficientBalance();
okToPurchase = false;
}
else if (currentProduct.Qty <= quantityToPurchase)
{
UI.printProductOutOfStock(currentProduct);
okToPurchase = false;
}
else if (quantityToPurchase < 0)
{
UI.printQuantityLessThanZero();
okToPurchase = false;
}
return okToPurchase;
}
