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path: root/bot.go
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package main

import (
	"context"
	"fmt"
	"log"
	"os"
	"strings"

	"github.com/go-telegram-bot-api/telegram-bot-api"
	"github.com/neonxp/rutina"
	"github.com/neonxp/tamtam"
)

type message struct {
	From    string
	To      int64
	Text    string
	Images  []string
	Sticker string
}

type routing struct {
	TgID int64
	TTID int64
}

func main() {
	tamtamToken := os.Getenv("TAMTAM")
	telegramToken := os.Getenv("TELEGRAM")
	r := rutina.New()

	routes := []routing{
		{TgID: -1001046507545, TTID: -69062921115159},
	}

	tt2tg := make(chan message, 1)
	tg2tt := make(chan message, 1)

	// region TamTam
	tamtamApi := tamtam.New(tamtamToken)
	ttch := make(chan interface{}, 1)
	r.Go(func(ctx context.Context) error {
		for {
			select {
			case <-ctx.Done():
				return nil
			case upd := <-ttch:
				log.Printf("[TT] Received: %#v", upd)
				switch upd := upd.(type) {
				case tamtam.UpdateMessageCreated:
					for _, r := range routes {
						if r.TTID == upd.Message.Recipient.ChatId {
							from := upd.Message.Sender.Name
							if upd.Message.Sender.Username != "" {
								from = fmt.Sprintf("%s (%s)", upd.Message.Sender.Name, upd.Message.Sender.Username)
							}
							isSticker := ""
							images := make([]string, 0)
							for _, a := range upd.Message.Body.Attachments {
								switch a := a.(type) {
								case *tamtam.PhotoAttachment:
									images = append(images, a.Payload.Url)
								case *tamtam.StickerAttachment:
									images = append(images, a.Payload.Url)
									isSticker = "STICKER"
								}
							}
							tt2tg <- message{
								To:      r.TgID,
								From:    from,
								Text:    upd.Message.Body.Text,
								Images:  images,
								Sticker: isSticker,
							}
						}
					}

				default:
					log.Printf("Unknown type: %#v", upd)
				}
			case msg := <-tg2tt:

				text := fmt.Sprintf("[TG] %s: %s", msg.From, msg.Text)
				if msg.Sticker != "" {
					text = fmt.Sprintf("[TG] %s: [%s]", msg.From, msg.Sticker)
				}
				if len(msg.Images) > 0 {
					text += "[IMAGES] " + strings.Join(msg.Images, " ")
				}
				res, err := tamtamApi.SendMessage(msg.To, msg.To, &tamtam.NewMessageBody{
					Text: text,
				})
				log.Printf("[TT] Answer: %#v %#v", res, err)
			}
		}
	}, rutina.ShutdownIfDone, rutina.RestartIfFail)
	r.Go(func(ctx context.Context) error {
		return tamtamApi.GetUpdatesLoop(ctx, ttch)
	}, rutina.ShutdownIfDone, rutina.RestartIfFail)
	// endregion

	// region Telegram
	tgApi, err := tgbotapi.NewBotAPI(telegramToken)
	if err != nil {
		log.Panic(err)
	}

	u := tgbotapi.NewUpdate(0)
	u.Timeout = 60
	updates, err := tgApi.GetUpdatesChan(u)
	r.Go(func(ctx context.Context) error {
		for {
			select {
			case <-ctx.Done():
				return nil
			case upd := <-updates:
				if upd.Message == nil { // ignore any non-Message Updates
					continue
				}
				for _, r := range routes {
					if r.TgID == upd.Message.Chat.ID {
						from := fmt.Sprintf("%s %s", upd.Message.From.FirstName, upd.Message.From.LastName)
						if upd.Message.From.UserName != "" {
							from = fmt.Sprintf("%s %s (%s)", upd.Message.From.FirstName, upd.Message.From.LastName, upd.Message.From.UserName)
						}
						isSticker := ""
						images := make([]string, 0)
						if upd.Message.Sticker != nil {
							isSticker = upd.Message.Sticker.Emoji
							s, _ := tgApi.GetFileDirectURL(upd.Message.Sticker.Thumbnail.FileID)
							images = append(images, s)
						}
						if upd.Message.Photo != nil {
							for _, p := range *upd.Message.Photo {
								s, _ := tgApi.GetFileDirectURL(p.FileID)
								images = append(images, s)
							}
						}
						tg2tt <- message{
							To:      r.TTID,
							From:    from,
							Text:    upd.Message.Text,
							Images:  images,
							Sticker: isSticker,
						}
					}
				}
			case msg := <-tt2tg:
				att := make([]interface{}, 0)
				for _, a := range msg.Images {
					att = append(att, tamtam.Image{Url: a})
				}
				text := fmt.Sprintf("[TT] %s: %s", msg.From, msg.Text)
				if msg.Sticker != "" {
					text = fmt.Sprintf("[TT] %s: [%s]", msg.From, msg.Sticker)
				}
				if len(msg.Images) > 0 {
					text += "[IMAGES] " + strings.Join(msg.Images, " ")
				}
				m := tgbotapi.NewMessage(msg.To, text)
				res, err := tgApi.Send(m)
				log.Printf("[TG] Answer: %#v %#v", res, err)
			}
		}
	}, rutina.ShutdownIfDone, rutina.RestartIfFail)

	// endregion

	r.ListenOsSignals()
	if err := r.Wait(); err != nil {
		log.Fatal(err)
	}
}