server.lua

local ox_inventory = exports["ox_inventory"]

lib.versionCheck("spectrumdevofficial/sd_fakeplate")

local plateChars = "ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789"
local function generatePlate()
    local plate = ""

    for i = 1, 8 do
        local rand = math.random(1, #plateChars)
        plate = plate..plateChars:sub(rand, rand)
    end

    return plate
end

local function generateMetadata(metadata, plate)
    local newMetadata = metadata or {}
    local plate = newMetadata.plate or plate or generatePlate()

    newMetadata.plate = plate
    newMetadata.label = plate

    return newMetadata
end

local function getUsableScrewdriver(source)
    local items = ox_inventory:Search(source, "slots", Config.Screwdriver.ItemName)

    if #items == 0 then
        return false, "screwdriver_missing"
    end

    for _, item in pairs(items) do
        if not Config.Screwdriver.Durability.Enabled then
            return true, item
        end

        item.metadata = item.metadata or {}
        item.metadata.durability = item.metadata.durability or 100

        local newDurability = item.metadata.durability - Config.Screwdriver.Durability.ReduceAmount
        if newDurability >= 0 then
            return true, item, newDurability
        end
    end

    return false, "screwdriver_destroyed"
end

local function changePlate(source, slotId)
    local playerPed = GetPlayerPed(source)
    local playerCoords = GetEntityCoords(playerPed)
    local vehicle, vehicleCoords = lib.getClosestVehicle(playerCoords, 5.0)
    if not vehicle then
        return false, "vehicle_not_found"
    end

    local hasScrewdriver, screwdriverData, newDurability = getUsableScrewdriver(source)
    if not hasScrewdriver then
        return false, screwdriverData
    end

    local slotData = ox_inventory:GetSlot(source, slotId)
    if not slotData then
        return false, "plate_missing"
    elseif slotData.name ~= Config.Plate.ItemName then
        return false, "plate_missing"
    elseif not slotData.metadata.plate then
        slotData.metadata = generateMetadata(slotData.metadata)
    end

    local netId = NetworkGetNetworkIdFromEntity(vehicle)
    local animResult, animMessage = lib.callback.await("sd_fakeplate:playAnim", source, netId)
    if not animResult then
        return false, animMessage
    end

    local removeResult, response = ox_inventory:RemoveItem(source, slotData.name, 1, nil, slotData.slot)
    if not removeResult then
        return false, "remove_failed"
    end

    local curPlate = GetVehicleNumberPlateText(vehicle)
    local newMetadata = generateMetadata(nil, curPlate)
    local addResult, response = ox_inventory:AddItem(source, slotData.name, 1, newMetadata)
    if not addResult then
        return false, "add_failed"
    end

    if newDurability then
        ox_inventory:SetDurability(source, screwdriverData.slot, newDurability)
    end

    local newPlate = slotData.metadata.plate
    SetVehicleNumberPlateText(vehicle, newPlate)
    ox_inventory:UpdateVehicle(curPlate, newPlate)

    local vehicleState = Entity(vehicle).state
    local realPlate = vehicleState.plate
    if not realPlate then
        realPlate = curPlate
        Entity(vehicle).state.plate = realPlate
    elseif realPlate == newPlate then
        Entity(vehicle).state.plate = nil
    end

    return true, "plate_changed"
end

local BusyPlayers = {}
AddEventHandler("ox_inventory:usedItem", function(source, itemName, slotId, metadata)
    if itemName ~= Config.Plate.ItemName then return end
    if BusyPlayers[source] then return end
    BusyPlayers[source] = true

    local result, message = changePlate(source, slotId)
    if message then
        local notifyType = result and "success" or "error"

        lib.notify(source, {
            type = notifyType,
            title = locale("notify_title"),
            description = locale(message),
            icon = "tarp",
        })
    end

    BusyPlayers[source] = nil
end)

ox_inventory:registerHook("createItem", function(payload)
    local metadata = payload.metadata
    local newMetadata = generateMetadata(metadata)

    return newMetadata
end, {
    itemFilter = {
        [Config.Plate.ItemName] = true
    }
})

local currentResource = GetCurrentResourceName()
AddEventHandler("onResourceStop", function(resource)
    if resource ~= currentResource then return end
    ox_inventory:removeHooks()
end)