feat: add proxy config in telegram dialer

bot/bot.go

@@ -2,34 +2,62 @@ package bot
 
 import (
 	"context"
+	"net/url"
 	"os"
 	"time"
 
 	"github.com/celestix/gotgproto"
 	"github.com/celestix/gotgproto/sessionMaker"
 	"github.com/glebarez/sqlite"
+	"github.com/gotd/td/telegram/dcs"
 	"github.com/krau/SaveAny-Bot/config"
 	"github.com/krau/SaveAny-Bot/logger"
+	"golang.org/x/net/proxy"
 )
 
 var Client *gotgproto.Client
 
+func newProxyDialer(proxyUrl string) (proxy.Dialer, error) {
+	url, err := url.Parse(proxyUrl)
+	if err != nil {
+		return nil, err
+	}
+	return proxy.FromURL(url, proxy.Direct)
+}
+
 func Init() {
 	logger.L.Info("Initializing client...")
 	ctx, cancel := context.WithTimeout(context.Background(), 60*time.Second)
 	defer cancel()
-
 	resultChan := make(chan struct {
 		client *gotgproto.Client
 		err    error
 	})
-
 	go func() {
-		client, err := gotgproto.NewClient(int(config.Cfg.Telegram.AppID), config.Cfg.Telegram.AppHash, gotgproto.ClientTypeBot(config.Cfg.Telegram.Token),
+		var resolver dcs.Resolver
+		if config.Cfg.Telegram.Proxy.Enable && config.Cfg.Telegram.Proxy.URL != "" {
+			dialer, err := newProxyDialer(config.Cfg.Telegram.Proxy.URL)
+			if err != nil {
+				resultChan <- struct {
+					client *gotgproto.Client
+					err    error
+				}{nil, err}
+				return
+			}
+			resolver = dcs.Plain(dcs.PlainOptions{
+				Dial: dialer.(proxy.ContextDialer).DialContext,
+			})
+		} else {
+			resolver = dcs.DefaultResolver()
+		}
+		client, err := gotgproto.NewClient(config.Cfg.Telegram.AppID,
+			config.Cfg.Telegram.AppHash,
+			gotgproto.ClientTypeBot(config.Cfg.Telegram.Token),
 			&gotgproto.ClientOpts{
 				Session:          sessionMaker.SqlSession(sqlite.Open("data/session.db")),
 				DisableCopyright: true,
 				Middlewares:      FloodWaitMiddleware(),
+				Resolver:         resolver,
 			},
 		)
 		resultChan <- struct {