public async Task <ServiceResult> AddItemToCartAsync(Guid cartId, Guid shopItemDetailId, int count)
{
Check.Positive(count, nameof(count));
var cartExist = await this.ExistAsync(x => x.Id == cartId);
if (cartExist == false)
{
return(ServiceResultFactory.NotFound);
}
var shopItemDetail = await _context.ShopItemDetails.FirstOrDefaultAsync(x => x.Id == shopItemDetailId);
if (shopItemDetail == null)
{
return(ServiceResultFactory.NotFound);
}
var oldCartShopItem = await _context.CartShopItems
.FirstOrDefaultAsync(x => x.CartId == cartId && x.ShopItemDetailId == shopItemDetailId);
if (oldCartShopItem == null)
{
// add new item
var newCartShopItem = new CartShopItem
{
CartId = cartId,
ShopItemDetailId = shopItemDetailId,
Price = shopItemDetail.Price,
Count = count
};
_context.CartShopItems.Add(newCartShopItem);
}
else
{
// increase count and update price
oldCartShopItem.Count += count;
oldCartShopItem.Price = shopItemDetail.Price;
_context.CartShopItems.Update(oldCartShopItem);
}
var result = await _context.SaveAsync(nameof(AddItemToCartAsync));
var taskModel = this.FindByAsync(x => x.Id == cartId);
await result.SetModelIfSuccessAsync(taskModel);
return(result);
}
public static CartShopItemViewModel Map(CartShopItem model)
{
if (model == null || model.ShopItemDetail == null || model.ShopItemDetail.ShopItem == null)
{
return(null);
}
return(new CartShopItemViewModel
{
Count = model.Count,
Price = model.Price,
ShopItemDetailId = model.ShopItemDetailId,
Kind = model.ShopItemDetail.Kind,
Title = model.ShopItemDetail.ShopItem.Title,
ImagePath = Constants.GetFullPathToImage(model.ShopItemDetail.ShopItem.ImagePath)
});
}
public static List <Cart> LoadCarts(IEnumerable <ShopItemDetail> shopItemDetails)
{
var carts = new List <Cart>();
foreach (var shopItemDetail in shopItemDetails)
{
var cartShopItem = new CartShopItem
{
Count = 1,
Price = shopItemDetail.Price,
ShopItemDetailId = shopItemDetail.Id
};
carts.Add(new Cart
{
CartShopItems = new List <CartShopItem>()
{
cartShopItem
}
});
}
return(carts);
}
