cmd_onoff.lua

function widget:GetInfo()
	return {
		name = "Onoff for Hound and trajectory",
		desc = "onoff action will now work with units affected by the cmd_onoffdesc.lua",
		author = "Lexon",
		date = "19.08.2022",
		license = "GNU GPL, v2 or later",
		layer = 0,
		enabled = true, --enabled by default
	}
end

local spGetSelectedUnitsSorted = Spring.GetSelectedUnitsSorted
local spGetUnitStates = Spring.GetUnitStates
local spGiveOrderToUnit = Spring.GiveOrderToUnit

local function onoff(_, state)
	--Should return { [number unitDefID] = { [1] = [number unitID], etc... }, ... }
	local selectedUnitsSorted = spGetSelectedUnitsSorted()

	for unitDefId, units in pairs(selectedUnitsSorted) do
		--Actual return doesn't seem to match documentation
		--First element is of selectedUnitsSorted is n = numberOfSelectedUnits
		--Skip that
		if unitDefId ~= "n" then
			if UnitDefs[unitDefId].onOffable == true then
				if state == nil then
					local isActive = spGetUnitStates(units[1])["active"]
					if isActive then state = 0 else state = 1 end
				end

				for _, unit in pairs(units) do
					Spring.Echo(state)
					spGiveOrderToUnit(unit, CMD.ONOFF, { state }, 0)
				end
			end
		end
	end
	return true
end

function widget:Initialize()
	widgetHandler:AddAction("onoff", onoff, nil, "t")
end