//Update Simple / Complex Discounts
public async Task <Result <Guid> > UpdateSimpleDiscountAsync(Guid existingDiscountId, string username, Guid storeId, RuleContext discountType, double precent, string category = "", Guid productId = new Guid())
{
if (discountsManager.IsComplexed(existingDiscountId))
{
return(new Result <Guid>(new Guid(), true, "Impossible to update a discount which other discounts are complexed on."));
}
var res = await marketRules.UpdateSimpleDiscountAsync(await MarketStores.Instance.GetStoreById(storeId), existingDiscountId, username, storeId, discountType, precent, category, productId);
Guid discountId = res.Ret;
await StorePredicatesManager.Instance.SaveRequest(++counter, existingDiscountId, "UpdateSimpleDiscountAsync", username, storeId, discountType, precent, category, productId, discountId);
var discountData = new DiscountData(discountId, username, storeId, discountType, RuleType.Simple, precent, category, productId, int.MaxValue, 0, default(DateTime), default(DateTime));
await discountsManager.RemoveDiscount(discountId);
await discountsManager.AddDiscount(discountData);
return(res);
}