Menu, lockdown and secret entrance

--[[ Local Variables ]]--

local termWidth, termHeight = termSize()
local selectedItem = 1
local inMainMenu = true
local inLockdownMenu = false

--[[ Menu Methods ]]--

function SecretEntrance },
  print("Opening")
  rs.setOutput("back",true)
  sleep(2)
  rs.setOutput("false",false)
  os.shutdown()
end

function Lockdown()
  inLockdownMenu = true
  selectedItem = 1

  while inLockdownMenu do
    term.clear()
    term.setCursorPos(1,1)
    printMenu(LockdownMenu)

    event, key = os.pullEvent("key")
    onKeyPressed(key, LockdownMenu)
  end
end

function LockdownOn()
  print("Activating Lockdown")
  rs.setOutput("left",true)
  sleep(2)
  print("Lockdown activated")
  sleep(10)
  inLockdownMenu = false
  selectedItem = 1
end

function LockdownOff()
  print("Deactivating Lockdown")
  rs.setOutput("left",true)
  sleep(2)
  print("Lockdown deactivated")
  inLockdownMenu = false
  selectedItem = 1
end

function Config()
  inMainMenu = false
end

function shutdown()
  shell.run("stop")
end

--[[ Menu Definitions ]]--

mainMenu = {
  [1] = { text = "Secret Entrance", handler = SecretEntrance },
  [2] = { text = "Lockdown", handler = Lockdown },
  [3] = { text = "Config", handler = Config },
  [4] = { text = "Shutdown", handler = shutdown }
}

LockdownMenu = {
  [1] = { text = "Activate Lockdown", handler = LockdownOn },
  [2] = { text = "Deactivate Lockdown", handler = LockdownOff }
}

--[[ Printing Methods ]]--

function printMenu( menu )
  for i=1,#menu do
    if i == selectedItem then
      print(">> "..menu[i].text)
    else
      print("   "..menu[i].text)
    end
  end
end

--[[ Handler Methods ]]--
function onKeyPressed( key, menu)
  if key == keys.enter then
    onItemSelected(menu)
  elseif key == keys.up then
    if selectedItem > 1 then
      selectedItem = selectedItem - 1
    end
  elseif key == keys.down then
    if selectedItem < #menu then
      selectedItem = selectedItem + 1
    end
  end
end

function onItemSelected( menu )
  menu[selectedItem].handler()
end

--[[ Main Method ]]--

function main()
  while inMainMenu do
    term.clear()
    term.setCursorPos(1,1)
    printMenu(mainMenu)

    event, key = os.pullEvent("key")
    onKeyPressed(key,mainMenu)
  end
end

main()