msgBoard

rednet.open("bottom")
--ease of use function ftw!
function reply(text)
  rednet.broadcast(text)
  print("replied: "..text)
  end

function rec(timeout)
  if timeout == nil then
    id, msg, d = rednet.receive()
  else
    id, msg, d = rednet.receive(timeout)
    end
  print("Message received!")
  end

--Real code now;

function loadFile()
  local check = fs.exists("messages")
  if check == true then
    shell.run("messages")
  else
    saveFile(true)
    end
  end

function saveFile(gen)
  if gen == nil then
    w = fs.open("messages", "a")
    w.writeLine("center("..[["]]..MESSAGE..[["]]..")")
    w.writeLine("p.setTextColor(colors.yellow)")
    w.writeLine("center("..[["]].."-"..USER..[["]]..")")
    w.writeLine("p.setTextColor(colors.white)")
    w.close()
    os.reboot()
  else
    w = fs.open("messages", "w")
    w.writeLine("p = peripheral.wrap("..[["]].."top"..[["]]..")")
    w.writeLine("p.setTextScale(1)")
    w.writeLine("p.clear()")
    w.writeLine("p.setCursorPos(1,1)")
    w.writeLine("function center(text)")
    w.writeLine("local x, y = p.getSize()")
    w.writeLine("local x2, y2 = p.getCursorPos()")
    w.writeLine("local length = text:len()")
    w.writeLine("if length > x then")
    w.writeLine("while true do")
    w.writeLine("if length >= x then")
    w.writeLine("p.write(text)")
    w.writeLine("text = string.sub(text, (x + 1))")
    w.writeLine("length = length - x")
    w.writeLine("y2 = y2 + 1")
    w.writeLine("p.setCursorPos(1, y2)")
    w.writeLine("else")
    w.writeLine("p.setCursorPos(math.ceil((x / 2) - (text:len() / 2)), y2)")
    w.writeLine("p.write(text)")
    w.writeLine("y2 = y2 + 1")
    w.writeLine("p.setCursorPos(1, y2)")
    w.writeLine("break")
    w.writeLine("end")
    w.writeLine("end")
    w.writeLine("else")
    w.writeLine("p.setCursorPos(math.ceil((x / 2) - (text:len() / 2)), y2)")
    w.writeLine("p.write(text)")
    w.writeLine("y2 = y2 + 1")
    w.writeLine("p.setCursorPos(1, y2)")
    w.writeLine("end")
    w.writeLine("end")
    w.writeLine("p.setTextColor(colors.orange)")
    w.writeLine("center("..[["]].."Server Message Board"..[["]]..")")
    w.writeLine("local x, y = p.getSize()")
    w.writeLine("for i = 1, x do")
    w.writeLine("p.write("..[["]].."~"..[["]]..")")
    w.writeLine("end")
    w.writeLine("p.setCursorPos(1, 3)")
    w.writeLine("p.setTextColor(colors.white)")
    w.close()
    os.reboot()
    end
  end

function re()
  rec()
  if msg == "start" then
    reply("go on")
    while true do
    id, mssg, d = rednet.receive(15)
    if mssg == "user" then
      reply(".")
      id, USER, d = rednet.receive(15)
      print("received user: "..USER)
      reply(".")
    elseif mssg == "message" then
      reply(".")
      id, MESSAGE, d = rednet.receive(15)
      print("received msg: "..MESSAGE)
      reply(".")
    elseif mssg == "end" then
      print("Transmission over")
      saveFile()
      break
      end
      end
  else
    os.reboot()
    end
  end

loadFile()
re()