startup

modem = peripheral.wrap("top")
usersApp = fs.open("users", "a")
term.clear()
term.setCursorPos(1, 1)
users = {}
channel1 = 4826
channel2 = 3984
function openPort(port)
  if not modem.isOpen(port) then modem.open(port)
  end
end

args = {...}

if args[1] == "-mkuser" and #args < 3 then
print("You are missing arguments.")
os.reboot()
end

if args[1] == "-mkuser" and #args == 3 then
users[#users+1] = args[2].." "..args[3]
print("User successfully created!")
os.reboot()
end

if args[1] == "-delUsers" and args[2] == "u778p" then
usersApp = fs.open("users", "w")
usersApp.write("")
end


function reset()
term.clear()
term.setCursorPos(1, 1)
end

print("Booting")
sleep(0.5)
reset()
print("Booting.")
sleep(0.5)
reset()
print("Booting..")
sleep(0.5)
reset()
print("Booting...")
sleep(1)
reset()

openPort(channel1)
openPort(channel2)


function getInfo(usr, pswd)
while usr == 0 or pswd == 0 do
  event, side, frequency, replyFrequency,
  message, distance =
  os.pullEvent("modem_message")
  if event == "modem_message" then
    if frequency == channel1 then
      username = message
      sendChannel1 = replyFrequency
      usr = 1
      end
      if frequency == channel2 then
      password = message
      sendChannel2 = replyFrequency
      pswd = 1
      end
    end
  end
end

function saveUsers(username, password)
usersApp.writeLine(username.." "..password)
usersApp.flush()
end

while true do
getInfo(0, 0)
saveUsers(username, password)
end