AlyxResinRadar.lua

local stateFirstLoad = true
local stateToolHeld = false

function RunResinRadar()
    if stateFirstLoad then
        stateFirstLoad = false
        print("Initializing Resin Detector.")

        ListenToGameEvent("weapon_switch", OnSwitch, itemTable)

        local mTool = Entities:FindByClassname(nil, "hlvr_multitool")
        stateToolHeld = IsValidEntity(mTool)
    end 

    if  stateToolHeld then
        EmitResinSound()
    end
end

function OnSwitch(itemTable)
    stateToolHeld = itemTable["item"] == "hlvr_multitool"
end

function EmitResinSound()
    local res = Entities:FindAllByClassname("item_hlvr_crafting_currency_small")
    for k,v in pairs(res) do
        EmitSoundOn("HackingPuzzle.TripminePulse", v)
    end
end