Task Manager

SIDE = "top"

local monitor = peripheral.wrap(SIDE)
local tasks = {}

local function centerText(text)
  x,y = monitor.getSize()
  x1,y1 = monitor.getCursorPos()
  monitor.setCursorPos((math.floor(x/2) - (math.floor(#text/2))) + 1, y1) -- this is why we cant have nice things
  monitor.write(text)
end

local function UpdateMonitor()
  monitor.setCursorPos(0, 3)
  monitor.clear()
  monitor.setTextColor(colors.orange)
  centerText("Task Manager")

  if #tasks > 0 then
    cursorY = 5
    for i=1, #tasks, 1 do
      if tasks[i].priority == 1 then
        monitor.setTextColor(colors.red)
      elseif tasks[i].priority == 2 then
        monitor.setTextColor(colors.yellow)
      elseif tasks[i].priority == 3 then
        monitor.setTextColor(colors.green)
      else
        monitor.setTextColor(colors.white)
      end

      monitor.setCursorPos(0, cursorY)
      centerText(tasks[i].task)
      cursorY = cursorY + 1
    end
  end
end

local function AddTask(task, priority)
  table.insert(tasks, {task=task, priority=priority})
  UpdateMonitor()
end

UpdateMonitor()
sleep(2)
AddTask("Aerotheum Automation", 1)
sleep(2)
AddTask("Petrotheum Automation", 1)
sleep(2)
AddTask("Task Manager Add/Remove", 3)