public async Task <int> ChangeShoppingCartProductCountAsync(Product product, ShoppingCart shoppingCart, string operation, ISession session)
{
if (shoppingCart != null)
{
int returnCode = 1;
await Task.Run(() =>
{
try
{
ShoppingCartProduct shoppingCartProduct = _context.ShoppingCartProduct
.Where(scp => scp.Product.Name == product.Name && scp.ShoppingCart == shoppingCart)
.FirstOrDefault();
//Change
if (operation == "reduce" && shoppingCartProduct.Quantity > 1)
{
shoppingCartProduct.Quantity--;
}
else if (operation == "increase")
{
shoppingCartProduct.Quantity++;
}
_context.Update(shoppingCartProduct);
_context.Update(shoppingCart);
var t2 = Task.Run(
async() =>
{
await _context.SaveChangesAsync();
});
t2.Wait();
returnCode = 0;
}
catch (Exception)
{
returnCode = 1;
}
});
return(returnCode);
}
else
{
if (operation == "reduce")
{
await session.AddSessionProductAsync(product.Id, -1);
}
else if (operation == "increase")
{
await session.AddSessionProductAsync(product.Id, 1);
}
return(0);
}
}
public async Task <int> AddProductToShoppingCartAsync(Product product, ShoppingCart cart, int quantity, ISession session)
{
if (cart != null)
{
int returnCode = 1;
// 0 - success
// 1 - error
// 2 - limit reached
await Task.Run(() =>
{
try
{
// Check if such product has already been added
ShoppingCartProduct shoppingCartProduct = _context.ShoppingCartProduct
.Where(scp => scp.Product == product && scp.ShoppingCart == cart)
.FirstOrDefault();
// No such product found
if (shoppingCartProduct == null)
{
int productsInCart = 0;
var t = Task.Run(async() => { productsInCart = await CountProductsInShoppingCart(cart); });
t.Wait();
if (productsInCart >= maxProductsInShoppingCart)
{
returnCode = 2;
}
else
{
shoppingCartProduct = new ShoppingCartProduct
{
Product = product,
ShoppingCart = cart,
Quantity = quantity
};
_context.Add(shoppingCartProduct);
var t2 = Task.Run(
async() =>
{
await _context.SaveChangesAsync();
});
t2.Wait();
returnCode = 0; // success
}
}
// Product found: update it
else
{
shoppingCartProduct.ShoppingCart = cart;
shoppingCartProduct.Quantity += quantity;
_context.Update(shoppingCartProduct);
var t2 = Task.Run(
async() =>
{
await _context.SaveChangesAsync();
});
t2.Wait();
returnCode = 0; // success
}
}
catch (Exception)
{
returnCode = 1; // exception
//throw new Exception(e.ToString());
}
});
return(returnCode);
}
else
{
if (await session.CountProducts() >= maxProductsInShoppingCart)
{
return(2);
}
else
{
await session.AddSessionProductAsync(product.Id, quantity);
return(0);
}
}
}
