small telegram bot example for golang

gourbot.go

// test new bot api
// start it as:
// gourbot "token:forBot"
// or
// BOT_TOKEN="token:forBot" gourbot
//

package main

import (
	tgbotapi "github.com/go-telegram-bot-api/telegram-bot-api"
	"log"
	"os"
)

func GetToken() string {
	if len(os.Args) > 1 {
		log.Println("got token from command line arg")
		return os.Args[1]
	}
	v := os.Getenv("BOT_TOKEN")
	if v != "" {
		log.Println("got token from envvar")
		return v
	}
	log.Fatal("token not set. set it as commandline arg or in BOT_TOKEN envvar")
	return ""
}

func main() {
	log.Println("create bot api")
	bot, err := tgbotapi.NewBotAPI(GetToken())
	if err != nil {
		log.Fatalln(err)
	}
	log.Println("connection established, get my id")
	user, err := bot.GetMe()
	if err != nil {
		log.Fatalln(err)
	}
	log.Printf("My user record: %#v", user)
	log.Println("create channel for updates")
	updates_config := tgbotapi.NewUpdate(0)
	updates_config.Timeout = 60
	updates, err := bot.GetUpdatesChan(updates_config)
	if err != nil {
		log.Fatalln(err)
	}
	log.Println("channel created. handle updates trough channel")
	for {
		update, ok := <-updates
		if !ok {
			log.Println("connection lost")
			break
		}
		log.Printf("got %#v", update)
		if bot.IsMessageToMe(update.Message) {
			log.Println("it is an message for me!")
			reply := tgbotapi.NewMessage(update.Message.Chat.ID, 
				update.Message.From.String() + 
				", I hear you and your message: " + 
				update.Message.Text)
			reply.ReplyToMessageID = update.Message.MessageID
			log.Println("send reply")
			m2, err := bot.Send(reply)
			if err != nil {
				log.Fatalln(err)
			}
			log.Printf("send result: %#v", m2)
		}
	}
}