private async Task <int> AddOrRemoveCartAsync(AutomotivePart part, int qty)
{
var shoppingCartItem = _context.ShoppingCartItems
.SingleOrDefault(s => s.AutomotivePartId == part.Id && s.ShoppingCartId == Id);
if (shoppingCartItem == null)
{
shoppingCartItem = new ShoppingCartItem
{
ShoppingCartId = Id,
AutomotivePart = part,
Quantity = 0
};
_context.ShoppingCartItems.Add(shoppingCartItem);
}
shoppingCartItem.Quantity += qty;
if (shoppingCartItem.Quantity <= 0)
{
shoppingCartItem.Quantity = 0;
_context.ShoppingCartItems.Remove(shoppingCartItem);
}
await _context.SaveChangesAsync();
ShoppingCartItems = null;
return(await Task.FromResult(shoppingCartItem.Quantity));
}
public async Task <int> RemoveFromCartAsync(AutomotivePart part)
{
return(await AddOrRemoveCartAsync(part, -1));
}
public async Task <int> AddToCartAsync(AutomotivePart part)
{
return(await AddOrRemoveCartAsync(part, 1));
}
