Spawner Control

local tArg = { ... }

--variables
local rSide = "bottom"
local rInput = "not set"
local rState = "off"

--predeclare
local printUsage
local getState

--functions--
function getState()
  if redstone.getOutput(rSide,false) then
    rState = "Spawner Active."
    return
  elseif redstone.getOutput(rSide,true) then
    rState = "Spawner Inactive."
    return
  else
    print( "Redstone GetState Error." )
    return
  end
end

function printUsage()
  print( "Usage: spawner <on/off/current>" )
  return
end

local rInput = tArg[1]

--start--
if #tArg <1 then
  printUsage()
  return
elseif rInput == "on" then
  redstone.setOutput(rSide,false)
  print( "Spawner now active." )
  return
elseif rInput == "off" then
  redstone.setOutput(rSide,true)
  print( "Spawner now inactive." )
  return
elseif rInput == "current" then
  getState()
  print( rState )
  return
else
  print("Error.")
  printUsage()
end