startup

monitor = peripheral.wrap("right")
monitor.clear()
local Table = {}
local function screenRefresh()
  monitor.clear()
  monitor.setCursorPos(1,1)
  local x = 1
  local y = 1
  monitor.write("     THE GRAND TODO LIST!")
  y=y+1

  monitor.setCursorPos(x,y)
    for i = 1,#Table do
       monitor.setCursorPos(x,y)
       monitor.write(i..") "..Table[i])
       y=y+1
    end
end


function save(table,name)
  local file = fs.open(name,"w")
  file.write(textutils.serialize(table))
  file.close()
end

function load(name)
  local file = fs.open(name,"r")
  local data = file.readAll()
  file.close()
  return textutils.unserialize(data)
end



local input = ""
local numin = 0
local taskin = ""
while true do
  screenRefresh()
  print("What would you like to do?")
  print("1) Add new item.")
  print("2) Remove item.")
  print("3) Refresh List.")
  print("4) Restore Data.")

  input = read()
  if (input == "1") and (#Table < 15) then
    print("New Item:")
    taskin = read()
    table.insert(Table, taskin)
    screenRefresh()
    save(Table,"saved")
  elseif #Table > 15 then
    print("Sorry, the list is full!")
  end
  if (input == "2") then
    print("Which item should I remove?")
    numin = tonumber(read())
    if((numin ~= nil) and (numin <= #Table) and (numin >0)) then
      table.remove(Table, numin)
      save(Table,"saved")
      screenRefresh()
    else
      print("That was not a number. Please Enter a number.")
    end
  end
  if (input == "3") then
    screenRefresh()
  end
  if(input == "4") then
   Table = load("saved")
    screenRefresh()
  end
end