public async Task<ActionResult> AddItemToCart(int id, int wishlistItemId) {
var isInCart = await _db.CartItems.AnyAsync(ci => ci.CartId == id && ci.Item.Id == wishlistItemId);
if (isInCart) {
return Json(new { WasInCart = true });
}
var item = await _db.WishlistItems.FindAsync(wishlistItemId);
var retailer = new AmazonRetailer(AmazonAssociateTag, AmazonAccessKey, "AWSECommerceServicePort");
var retailItem = (await retailer.LookupItemsAsync(new[] { item.ItemId })).FirstOrDefault();
var cart = await _db.Carts.FindAsync(id);
var cartItem = new CartItem {
Cart = cart,
Item = item,
Price = retailItem.ListPrice,
Title = retailItem.Title
};
_db.CartItems.Add(cartItem);
await _db.SaveChangesAsync();
return Json(new { IsInCart = true });
}
private async Task<IList<Item>> LookupItems(IEnumerable<WishlistItem> wishlistItems) {
const int MaxLookupCount = 10;
var itemIds = wishlistItems.Select(wi => wi.ItemId)
.ToArray();
var items = new List<Item>();
var retailer = new AmazonRetailer(AmazonAssociateTag, AmazonAccessKey, "AWSECommerceServicePort");
while (itemIds.Any()) {
var lookupIds = itemIds.Take(MaxLookupCount)
.ToArray();
var resultItems = await retailer.LookupItemsAsync(lookupIds);
items.AddRange(resultItems);
itemIds = itemIds.Skip(lookupIds.Length)
.ToArray();
}
return items;
}