As the title says

Start by going into your Item Script and Add this under your existing fields (e.g. after m_price):

[Header("Shop Settings")]
[SerializeField, Min(0)] private int m_maxShopQuantity = 0; // 0 = unlimited

public int maxShopQuantity => m_maxShopQuantity;

after this, make sure that you have this line of code in your InventorySystem script, if not, add this:

public int GetItemCount(Item item)
{
    if (items.TryGetValue(item, out int count))
    {
        return count;
    }

    return 0;
}

Now go into your UIShop script and replace the OnShopSlotClicked(Item item) with this:

private async void OnShopSlotClicked(Item item)
{
    // 1) Max quantity check
    int maxQty = item.maxShopQuantity; // 0 = unlimited
    if (maxQty > 0)
    {
        int owned = GameManager.InventorySystem.GetItemCount(item);

        if (owned >= maxQty)
        {
            // Player already owns the max allowed amount
            // Reuse your "cannot buy" dialogue
            await GameManager.DialogueSystem.Main.PlayNow(
                DialogueUtils.CreateDialogueTree(
                    m_cannotBuy,
                    null,
                    item.displayName
                )
            );

            return;
        }
    }

    // 2) Normal price & money check
    int itemPrice = m_shop.GetPrice(item, ETransactionType.Buy);

    if (GameManager.InventorySystem.money >= itemPrice)
    {
        GameManager.InventorySystem.RemoveMoney(itemPrice);
        GameManager.InventorySystem.AddToBag(item, 1, EItemTransferType.Trading);
        GameManager.NotificationSystem.audioPlaybackRequested.Invoke(m_buySellAudio);

        // For better UX: jump to category of purchased item
        m_inventoryBag.SetCategory(item.category);

        // 3) Refresh inventory & shop (skip rebuilding bag item slots)
        UpdateUI(true);
    }
    else
    {
        await GameManager.DialogueSystem.Main.PlayNow(
            DialogueUtils.CreateDialogueTree(
                m_cannotBuy,
                null,
                item.displayName
            )
        );
    }
}

Still in UIShop, replace your FillSlots() with this:

private void FillSlots()
{
    int itemCount = m_shop.items.Length;
    m_slots = new UIShopEntry[itemCount];

    int slotIndex = 0;

    for (int i = 0; i < itemCount; ++i)
    {
        Item item = m_shop.items[i];

        // --- NEW: skip sold-out items ---
        int maxQty = item.maxShopQuantity;
        if (maxQty > 0)
        {
            int owned = GameManager.InventorySystem.GetItemCount(item);
            if (owned >= maxQty)
            {
                continue; // don't create a slot for this item
            }
        }
        // --------------------------------

        GameObject itemSlot = Instantiate(m_shopEntryPrefab, m_itemSlotsRoot.transform);
        UIShopEntry shopEntry = itemSlot.GetComponent<UIShopEntry>();

        if (shopEntry)
        {
            shopEntry.Initialize(item);
            m_slots[slotIndex] = shopEntry;
            ++slotIndex;
        }
    }
}

and you should be good to go! now just set a max quantity on your items prefab!

If there’s any issues let me know!

Mythril2D Add-Ons

Shop Max Quantity

💬 Comments (0)