server-signing.go

type Server struct {
	clients map[string]client.Client
}

func (s *Server) SignIn(request string, response *string) error {
	if request == "" {
		*response = "empty request. sign in failed"
	} else {
		parts := strings.Split(request, ",")

		if len(parts) != 3 {
			*response = "not enough information. sign in failed"
			log.Printf("failed sign in: %v", request)
			return nil
		} else {
			newClient := client.Client{Username: parts[0], Ip: parts[1]}
			if port, e := strconv.Atoi(parts[2]); e == nil {
				newClient.Port = port

				if s.clients == nil {
					s.clients = make(map[string]client.Client)
				}

				s.clients[parts[0]] = newClient
				*response = "signed in successfully"
				log.Printf("%+v signed in successfully. Clients: %+v\n", newClient, s.clients)
			} else {
				*response = "wrong port. sign in failed"
				log.Printf("failed sign in: %v", request)
				return nil
			}
		}
	}

	return nil
}