if event.type == "program" then
    mem.drawerChannel = "maindrawer"
    mem.tubeChannel = "maindrawerout"
    mem.filterChannel = "drawercontroller"
    mem.count = 0
    mem.queue = {}
    mem.currentTask = nil
    mem.state = "idle"
    digiline_send("drawerindicator", "blue")
 end
  
if event.type == "digiline" and event.channel == "drawercontroller" then
  if event.msg.status then return end

  table.insert(mem.queue, event.msg)
  interrupt(1)
end
  
if event.type == "interrupt" then
  if #mem.queue == 0 and mem.currentTask == nill then 
    mem.state = "idle"
    digiline_send("drawerindicator", "green")
    return 
  end
  if mem.currentTask == nil then
    mem.currentTask = table.remove(mem.queue, 1)
    mem.count = mem.currentTask.count
    mem.state = "working on " .. mem.currentTask.name
    digiline_send("drawerindicator", "red")
    digiline_send(mem.tubeChannel, mem.currentTask.destination)
  end
  if mem.count == 0 then
    mem.state = "idle"
    digiline_send(mem.filterChannel, {name=mem.currentTask.name, status="finished"})
    digiline_send("drawerindicator", "green")
    mem.currentTask = nil
  else
    digiline_send(mem.drawerChannel, mem.currentTask.item .. " " .. tostring(mem.currentTask.stacksize))
    mem.count = mem.count - 1
  end
  interrupt(1)
end