main.go

package main

import (
	"context"
	"net/http"
	"os"
	"os/signal"

	bot "github.com/gokhanaltun/go-telegram-bot"
	"github.com/gokhanaltun/go-telegram-bot/models"
)

// Send any text message to the bot after the bot has been started

func main() {
	ctx, cancel := signal.NotifyContext(context.Background(), os.Interrupt)
	defer cancel()

	opts := []bot.Option{
		bot.WithDefaultHandler(handler),
	}

	b, err := bot.New(os.Getenv("EXAMPLE_TELEGRAM_BOT_TOKEN"), opts...)
	if nil != err {
		// panics for the sake of simplicity.
		// you should handle this error properly in your code.
		panic(err)
	}

	b.SetWebhook(ctx, &bot.SetWebhookParams{
		URL: "https://example.com/webhook",
	})

	go func() {
		http.ListenAndServe(":2000", b.WebhookHandler())
	}()

	// Use StartWebhook instead of Start
	b.StartWebhook(ctx)

	// call methods.DeleteWebhook if needed
}

func handler(ctx context.Context, b *bot.Bot, update *models.Update) {
	b.SendMessage(ctx, &bot.SendMessageParams{
		ChatID: update.Message.Chat.ID,
		Text:   update.Message.Text,
	})
}