// Adding the item to cart
public async Task <IActionResult> Add(int listingId, string userId)
{
string url = "/Accounts/Login";
if (userId == null)
{
return(LocalRedirect(url));
}
// Find the cart associated with this account
var cartContext = await _context.Cart
.Where(s => s.TransactionComplete == false)
.FirstOrDefaultAsync(s => s.AccountId.ToString() == userId);
// If the account does not have a cart associated with them, create one
if (cartContext == null)
{
await CreateCart(userId);
cartContext = await _context.Cart.
Where(s => s.TransactionComplete == false)
.FirstOrDefaultAsync(s => s.AccountId.ToString() == userId);
}
// Does this item already exist in this cart?
var itemContext = await _context.ItemsForCart
.Where(s => s.CartId == cartContext.CartId)
.FirstOrDefaultAsync(s => s.SellListingId == listingId);
if (itemContext == null)
{
ItemsForCart item = new ItemsForCart();
item.CartId = cartContext.CartId;
item.SellListingId = listingId;
item.Quantity = 1;
if (ModelState.IsValid)
{
_context.Add(item);
await _context.SaveChangesAsync();
return(RedirectToAction(nameof(Index)));
}
}
else
{
// Find the associated cart item
itemContext.Quantity++;
_context.Update(itemContext);
await _context.SaveChangesAsync();
}
return(RedirectToAction("Index"));
}
public List <ItemsForCart> Cart()
{
SellListing sellListing = Product();
ItemsForCart product = new ItemsForCart
{
SellListing = sellListing,
Quantity = 1
};
List <ItemsForCart> cart = new List <ItemsForCart>();
cart.Add(product);
return(cart);
}