fix: compatibility between tdlib and bot api style chatID

storage/telegram/telegram.go

@@ -103,8 +103,8 @@ func (t *Telegram) Save(ctx context.Context, r io.Reader, storagePath string) er
 	if filename == "" {
 		filename = xid.New().String() + mtype.Extension()
 	}
-	peer := tctx.PeerStorage.GetInputPeerById(chatID)
-	if peer == nil {
+	peer := tryGetInputPeer(tctx, chatID)
+	if peer == nil || peer.Zero() {
 		return fmt.Errorf("failed to get input peer for chat ID %d", chatID)
 	}
 

storage/telegram/util.go

@@ -7,6 +7,9 @@ import (
 	"io"
 	"time"
 
+	"github.com/celestix/gotgproto/ext"
+	"github.com/gotd/td/constant"
+	"github.com/gotd/td/tg"
 	"github.com/krau/ffmpeg-go"
 	"github.com/yapingcat/gomedia/go-mp4"
 )
@@ -133,3 +136,28 @@ func extractFrameAt(rs io.ReadSeeker, timestamp float64) ([]byte, error) {
 
 	return out.Bytes(), nil
 }
+
+func tryGetInputPeer(ctx *ext.Context, chatID int64) tg.InputPeerClass {
+	peer := ctx.PeerStorage.GetInputPeerById(chatID)
+	if peer != nil && !peer.Zero() {
+		return peer
+	}
+	id := constant.TDLibPeerID(chatID)
+	plain := id.ToPlain()
+	var channel constant.TDLibPeerID
+	channel.Channel(plain)
+	peer = ctx.PeerStorage.GetInputPeerById(int64(channel))
+	if peer != nil && !peer.Zero() {
+		return peer
+	}
+	var chat constant.TDLibPeerID
+	chat.Chat(plain)
+	peer = ctx.PeerStorage.GetInputPeerById(int64(chat))
+	if peer != nil && !peer.Zero() {
+		return peer
+	}
+	var user constant.TDLibPeerID
+	user.User(plain)
+	peer = ctx.PeerStorage.GetInputPeerById(int64(user))
+	return peer
+}