startup

dial = peripheral.wrap("right")
monitor = peripheral.wrap("top")
controller = peripheral.wrap("Portal Controller_0")
portalActive = false
locationCount = 0

function update()
  portalActive = controller.isPortalActive()
  locationCount = dial.getStoredCount()
end

function drawScreen()
  if portalActive then
    monitor.setBackgroundColor(colors.green)
    monitor.clear()
    monW, monH = monitor.getSize()
    monitor.setCursorPos(monW / 2 - string.len("Terminate") / 2, monH / 2)
    monitor.write("Terminate")
  else
    monitor.setBackgroundColor(colors.black)
    monitor.clear()

    if (locationCount - 1 > 0) then
      for i = 1, locationCount do
        monitor.setCursorPos(1, i)

        if (i % 2 == 0) then
          monitor.setBackgroundColor(colors.gray)
        else
          monitor.setBackgroundColor(colors.lightGray)
        end

        name = dial.getStoredName(i - 1)
        monW, monH = monitor.getSize()

        monitor.write(name)
        k = string.len(name)

        while (k < monW) do
          monitor.write(" ")
          k = k + 1
        end

      end
    else
      monitor.setCursorPos(1, 1)
      monitor.write("No Entries")
    end
  end
end

function handleInput()
  event, side, posX, posY = os.pullEvent("monitor_touch")

  if portalActive then
    dial.terminate()
  else
    if (posY <= locationCount) then
      dial.dialStored(posY - 1)
    end
  end
end

while true do
  update()
  drawScreen()
  handleInput()
end