startup

function clear()
  term.clear()
  term.setCursorPos(1,1)
  term.setTextColor(colors.white)
end

function setColor(color)
  term.setTextColor(color)
end

function newUser()
  local user, pass
  setColor(colors.orange)
  print("Welcome!")
  setColor(colors.green)
  term.setCursorPos(11,20)
  term.write("Account creation")
  term.setCursorPos(1,3)

  print("Enter username")
  setColor(colors.white)
  user = read()
  setColor(colors.green)
  print("Enter password")
  setColor(colors.white)
  pass = read("*")

  return user, pass
end

function login(data)
  setColor(colors.green)
  print("Enter username")
  setColor(colors.white)
  local user = read()
  setColor(colors.green)
  print("Enter password")
  setColor(colors.white)
  local pass = read("*")
  if (user == data[0]) and (pass == data[1]) then
    return
  else
    setColor(colors.red)
    print("Invalid login")
    sleep(1)
    os.shutdown()
  end
end

---   Program   ---
os.pullEvent = os.pullEventRaw
clear()
local fileExist = io.open("home/userData", "r")

if (fileExist == nil) or (userData == "") then
  local user, pass = newUser()
  userDataW = io.open("home/userData", "w")
  userDataW:write(user.." "..pass)
  userDataW:close()
end
fileExist:close()
local userDataR = io.open("home/userData", "r")

local data = {}
local i = 0
for s in string.gmatch(userDataR:read(), "%S+") do
  data[i] = s
  i = i + 1
end


--Login
clear()
login(data)
clear()
setColor(colors.orange)
print("Welcome "..data[0])
sleep(1)
clear()