main.go

package main

import (
	"context"
	"errors"
	"fmt"
	"net"
	"os"
	"os/signal"
	"strconv"
	"syscall"
	"time"

	tea "github.com/charmbracelet/bubbletea"
	"github.com/charmbracelet/lipgloss"
	"github.com/charmbracelet/log"
	"github.com/charmbracelet/ssh"
	"github.com/charmbracelet/wish"
	"github.com/charmbracelet/wish/bubbletea"
	"github.com/charmbracelet/wish/logging"
	"github.com/muesli/termenv"
)

const (
	host = "0.0.0.0"
	port = "42069"
)

func main() {
	lipgloss.SetColorProfile(termenv.TrueColor)
	s, err := wish.NewServer(
		wish.WithAddress(net.JoinHostPort(host, port)),
		wish.WithHostKeyPath(".ssh/id_ed25519"),
		wish.WithMiddleware(
			myCustomBubbleteaMiddleware(),
			logging.Middleware(),
		),
	)

	if err != nil {
		log.Error("Could not start server", "error", err)
	}

	done := make(chan os.Signal, 1)
	signal.Notify(done, os.Interrupt, syscall.SIGINT, syscall.SIGTERM)
	log.Info("Starting SSH server", "host", host, "port", port)
	go func() {
		if err = s.ListenAndServe(); err != nil && !errors.Is(err, ssh.ErrServerClosed) {
			log.Error("Could not start server", "error", err)
			done <- nil
		}
	}()

	<-done
	log.Info("Stopping SSH server")
	ctx, cancel := context.WithTimeout(context.Background(), 30*time.Second)
	defer func() { cancel() }()
	if err := s.Shutdown(ctx); err != nil && !errors.Is(err, ssh.ErrServerClosed) {
		log.Error("Could not stop server", "error", err)
	}
}

func myCustomBubbleteaMiddleware() wish.Middleware {
	newProg := func(m tea.Model, opts ...tea.ProgramOption) *tea.Program {
		p := tea.NewProgram(m, opts...)
		return p
	}
	teaHandler := func(s ssh.Session) *tea.Program {
		_, _, active := s.Pty()
		if !active {
			wish.Fatalln(s, "no active terminal, skipping")
			return nil
		}

		// renderer := bubbletea.MakeRenderer(s)

		m := NewModel()
		m.Visitors = incrementVisitors()
		return newProg(m, append(bubbletea.MakeOptions(s), tea.WithAltScreen())...)
	}
	return bubbletea.MiddlewareWithProgramHandler(teaHandler, termenv.ANSI256)
}

func incrementVisitors() int {
	filename := "./visitors.txt"

	if _, err := os.Stat(filename); errors.Is(err, os.ErrNotExist) {
		os.WriteFile(filename, []byte("0"), 0644)
	}

	data, _ := os.ReadFile(filename)
	visitors, _ := strconv.Atoi(string(data))

	visitors++
	os.WriteFile(filename, []byte(fmt.Sprintf("%d", visitors)), 0644)
	return visitors
}