public static String DoAddCart(int qty, int productId, int userId)
{
Cart cp = CartHandler.getCartProduct(productId, userId);
int productStock = ProductHandler.getProductByID(productId).Stock;
if (qty < 1)
{
return("Quantity must be more than 0");
}
if (cp == null)
{
if (qty > productStock)
{
return("Quantity can't be more than available stock");
}
CartHandler.createCartProduct(userId, productId, qty);
return("");
}
else
{
int currCartStock = cp.Quantity;
int totalRequestStock = currCartStock + qty;
if (totalRequestStock > productStock)
{
return("Quantity must be less than or equals to product stocks");
}
CartHandler.updateCartProductQty(productId, userId, totalRequestStock);
return("");
}
}
