public void SaveWishlist(UserIdentity userId, Wishlist wishlist)
{
//assumption: the manage wishlist page will only allow to use a catalogue at a time (default: Stanley Gibbons)
// verify which item is already known
var knownItems = RetrieveKnownItems(wishlist.GetCatalogueReferences(CataloguesInUse.STANLEY_GIBBONS));
//save items not yet knownn
var unknownItems = wishlist.Where(wish => !knownItems.Any(itm => wish.IsSameItem(itm.CatalogueReference)));
itemsRepository.Save(unknownItems);
var inMemoryWishlist = knownItems.Select(item => item.Id);
inMemoryWishlist = inMemoryWishlist.Union(unknownItems.Select(item => item.Id));
// update wishlist
if (InMemoryDataStore.Wishlists.ContainsKey(userId))
{
InMemoryDataStore.Wishlists[userId] = inMemoryWishlist;
return;
}
// add new wishlist
InMemoryDataStore.Wishlists.Add(userId, inMemoryWishlist);
}