public async Task BuyItemCommand(string shopId, int itemId)
{
var context = Context;
var server = context.server;
var memory = server.GetMemory();
var cmdShopServerData = memory.GetData <CommandShopSystem, CommandShopServerData>();
var currencies = memory.GetData <CurrencySystem, CurrencyServerData>().Currencies;
var shops = cmdShopServerData.Shops;
if (!shops.TryGetValue(shopId, out Shop shop))
{
throw new BotError($"No such shop: `{shopId}`.");
}
itemId--;
if (shop.Items == null || itemId < 0 || itemId >= shop.Items.Length)
{
throw new BotError($"Invalid item id.");
}
var userId = context.socketServerUser.Id;
string error = null;
//Any exceptions inside this delegate will remove the item from the shop.
await shop.SafeItemAction(itemId, async item => {
if (item.prices.TryGetFirst(p => currencies[p.currency].GetAmount(userId) < p.amount, out var p))
{
//error = $"Not enough {currencies[price.currency]}. You need **{price.amount}**, but you only have **{currencyServerUserData[price.currency]}**.";
var currency = currencies[p.currency];
error = $"Not enough {currency}. You need **{p.amount}**, but you only have **{currency.GetAmount(userId)}**.";
return;
}
await item.command.Execute(context, (sc, cmd) => cmd.Replace("{item}", item.name, sc));
//Take the moneys
CurrencyAmount.TakeFromUser(item.prices, Context.socketServerUser);
});
if (error != null)
{
throw new BotError(error);
}
}
