/// <inheritdoc /> public void BuyItem(IPlayerEntity player, NpcShopItemInfo shopItemInfo, int quantity) { var npc = player.FindEntity <INpcEntity>(x => x.Object.Name == player.PlayerData.CurrentShopName); if (npc == null) { _logger.LogError($"ShopSystem: Cannot find NPC: {player.PlayerData.CurrentShopName}"); return; } if (!npc.NpcData.HasShop) { _logger.LogError($"ShopSystem: NPC {npc.Object.Name} doesn't have a shop."); return; } if (shopItemInfo.Tab < 0 || shopItemInfo.Tab >= ShopData.DefaultTabCount) { _logger.LogError($"Attempt to buy an item from {npc.Object.Name} shop tab that is out of range."); return; } ItemContainerComponent shopTab = npc.Shop.ElementAt(shopItemInfo.Tab); if (shopItemInfo.Slot < 0 || shopItemInfo.Slot > shopTab.MaxCapacity - 1) { _logger.LogError($"ShopSystem: Item slot index was out of tab bounds. Slot: {shopItemInfo.Slot}"); return; } Item shopItem = shopTab.GetItemAtSlot(shopItemInfo.Slot); if (shopItem.Id != shopItemInfo.ItemId) { _logger.LogError($"ShopSystem: Shop item id doens't match the item id that {player.Object.Name} is trying to buy."); return; } if (player.PlayerData.Gold < shopItem.Data.Cost) { _logger.LogTrace($"ShopSystem: {player.Object.Name} doens't have enough gold to buy item {shopItem.Data.Name} at {shopItem.Data.Cost}."); _textPacketFactory.SendDefinedText(player, DefineText.TID_GAME_LACKMONEY); return; } int itemsCreatedCount = _inventorySystem.CreateItem(player, shopItem, quantity); if (itemsCreatedCount > 0) { _playerDataSystem.DecreaseGold(player, shopItem.Data.Cost * itemsCreatedCount); } }