Todo List

mSide = "right"
function readLines(sPath)
-- reads the users file as raw text and returns it in a table.
  file = fs.open(sPath, "r")
  if file then
        tLines = {}
        sLine = file.readLine()
        while sLine do
          table.insert(tLines, sLine)
          sLine = file.readLine()
        end
        file.close()
        return tLines
  end
  return nil
end
-- Uses a table of text and writes it to the users file.
function writeLines(sPath, tLines)
  local file = fs.open(sPath, "w")
  if file then
    for _, sLine in ipairs(tLines) do
      file.writeLine(tostring(sLine))
    end
    file.close()
  else
    error(sPath .. " does not exist")
  end
end
function mPrint(s)
  win.print(s)
  -- m.write(s)
  -- mx,my=m.getCursorPos()
  -- m.setCursorPos(1,my+1)
end
function center(s)
  mx,my = win.getCursorPos()
  m.setCursorPos(math.floor((w/2)-(#s/2)),my)
  print(s)
end
function updateMonitor()
  win.clear()
  win.setCursorPos(1,1)
  t = term.redirect(win)
  center("TODO LIST")
  center("---------")
  for i=1,#currentlist do
    print(i .." " ..currentlist[i])
  end
  term.redirect(t)
end
m=peripheral.find("monitor")
m.setTextScale(1)
x,y = term.getSize()
w,h = m.getSize()
win = window.create(m,1,1,w,h)
currentlist = {}
if fs.exists("autolist") then
  currentlist = readLines("autolist")
end
while true do
  updateMonitor()
  term.clear()
  term.setCursorPos(1,1)
  print("Type in what needs to be done then hit enter, or type 'read' to see a current list")print("To clear an entry, first type 'rm' then hit enter, then enter the number that coresponds to the entry you wish to remove. Use 'read' to get this number")
  term.write("> ")
  input = io.read()
  if input == "read" then
    term.clear()
    term.setCursorPos(1,1)
    print("Current List Includes:")
    for i=1,#currentlist do
      print(i .." " ..currentlist[i])
    end
    sleep(4)
    term.setCursorPos(1,y-1)
    write("Press Any Key to Continue")
    while true do
      e,k = os.pullEvent("key")
      if e == "key" then
        break
      end
    end
    term.clearLine()
    sleep(1)
  elseif input == "exit" then
    writeLines("autolist",currentlist)
    print("Exiting")
    sleep(2)
    break
  elseif input == "rm" then
    print("Remove which number?")
    rm = io.read()
    if tonumber(rm)> #currentlist then
      print("Entry Number " .. " does not exist")
    else
      print("Removed " .. currentlist[tonumber(rm)])
      table.remove(currentlist,tonumber(rm))
      writeLines("autolist",currentlist)
    end
    sleep(3)
  else
    table.insert(currentlist,input)
    writeLines("autolist",currentlist)
    print("Added Entry:")
    print(input)
    sleep(5)
  end
end