lock

local oldPull = os.pullEvent;
os.pullEvent = os.pullEventRaw;
whileAsk = true;


modemSide = "left";
serverId = 11;
doorSide = "right";


if peripheral.getType(modemSide) == "modem" then
  rednet.open(modemSide);
else
  while whileAsk == true do
    shell.run("clear");
    print("Door offline!");
    print("Connect a Modem on the "..modemSide.." side!");
    sleep(1);
    if peripheral.getType(modemSide) == "modem" then
      whileAsk = false;
      rednet.open(modemSide);
    end;
  end;
end;
whileAsk = true;

while whileAsk == true do
  shell.run("clear");
  write("Username: ");
  user = io.read();
  write("Password: ");
  password = io.read();
  rednet.send(serverId, user);
  sleep(0.5);
  rednet.send(serverId, password);
  id, answer = rednet.receive(3);
  shell.run("clear");
  if answer == "" or answer == nil then
    print("No connection to the server!");
  else
    if id == serverId then
      if answer == "nottrusted" then
        print("This door has no trusted connection with the server!");
      end;
      if answer == "unknownuser" then
        print("Unknown user!");
      end;
      if answer == "wrongpassword" then
        print("Wrong password!");
      end;
      if answer == "noperm" then
        print("No permission to this door!");
      end;
      if answer == "true" then
        print("Correct informations.");
        sleep(0.5);
        shell.run("redset "..doorSide.." true");
        sleep(2.5);
        shell.run("redset "..doorSide.." false");
      end;
    end;
  end;
  sleep(1);
end;
os.pullEvent = oldPull;