How to make a Roblox inventory system (with AI)

Files Forge AI ships for this prompt

6 files · 230 lines · 56 seconds · 1 credit

Sample output: ServerScriptService/InventoryManager.lua

--!strict
-- ServerScriptService/InventoryManager.lua  (Forge AI · excerpt)
local ReplicatedStorage = game:GetService("ReplicatedStorage")
local ItemConfig = require(ReplicatedStorage.Modules.ItemConfig)
local SaveService = require(script.Parent.InventorySaveService)

type Slot = { itemId: string?, count: number }
type Inventory = { slots: { Slot }, hotbar: { Slot } }

local SLOT_COUNT = 30

local function getOrInit(player: Player): Inventory
    local inv = SaveService:Get(player)
    if not inv then
        inv = { slots = table.create(SLOT_COUNT, { itemId = nil, count = 0 } :: Slot), hotbar = table.create(5, { itemId = nil, count = 0 } :: Slot) }
        SaveService:Set(player, inv)
    end
    return inv
end

local InventoryManager = {}

function InventoryManager:addItem(player: Player, itemId: string, count: number): boolean
    local inv = getOrInit(player)
    local def = ItemConfig[itemId]
    if not def then return false end

    -- 1. Try to stack into existing slots
    if def.stackable then
        for _, slot in ipairs(inv.slots) do
            if slot.itemId == itemId and slot.count < def.stackCap then
                local room = def.stackCap - slot.count
                local add = math.min(count, room)
                slot.count += add
                count -= add
                if count <= 0 then SaveService:Set(player, inv); return true end
            end
        end
    end

    -- 2. Fill empty slots
    for _, slot in ipairs(inv.slots) do
        if not slot.itemId then
            slot.itemId = itemId
            slot.count = def.stackable and math.min(count, def.stackCap) or 1
            count -= slot.count
            if count <= 0 then SaveService:Set(player, inv); return true end
        end
    end

    return false  -- inventory full
end

return InventoryManager