handlematrix: implement RoomNameHandlingNetworkAPI

pkg/connector/capabilities.go

@@ -60,7 +60,7 @@ func (tg *TelegramConnector) GetCapabilities() *bridgev2.NetworkGeneralCapabilit
 }
 
 func (tg *TelegramConnector) GetBridgeInfoVersion() (info, capabilities int) {
-	return 1, 7
+	return 1, 8
 }
 
 // TODO get these from getConfig instead of hardcoding?
@@ -210,7 +210,7 @@ func makeTimerList() []jsontime.Milliseconds {
 var telegramTimers = makeTimerList()
 
 func (t *TelegramClient) GetCapabilities(ctx context.Context, portal *bridgev2.Portal) *event.RoomFeatures {
-	baseID := "fi.mau.telegram.capabilities.2025_11_12"
+	baseID := "fi.mau.telegram.capabilities.2025_11_24"
 	feat := &event.RoomFeatures{
 		Formatting:          formattingCaps,
 		File:                fileCaps,
@@ -228,6 +228,9 @@ func (t *TelegramClient) GetCapabilities(ctx context.Context, portal *bridgev2.P
 			Types:  []event.DisappearingType{event.DisappearingTypeAfterSend},
 			Timers: telegramTimers,
 		},
+		State: event.StateFeatureMap{
+			event.StateRoomName.Type: {Level: event.CapLevelFullySupported},
+		},
 	}
 	// TODO non-admins can only edit messages within 48 hours
 
@@ -261,6 +264,7 @@ func (t *TelegramClient) GetCapabilities(ctx context.Context, portal *bridgev2.P
 		baseID += "+dm"
 		feat.DeleteChat = true
 		feat.DeleteChatForEveryone = true
+		feat.State = nil
 	default:
 		// Group creators can delete the chat for everyone, unless it's a large channel
 		if peerType == ids.PeerTypeChat || portalMetadata.ParticipantsCount < 1000 {

pkg/connector/handlematrix.go

@@ -68,6 +68,7 @@ var (
 	_ bridgev2.TagHandlingNetworkAPI            = (*TelegramClient)(nil)
 	_ bridgev2.ChatViewingNetworkAPI            = (*TelegramClient)(nil)
 	_ bridgev2.DeleteChatHandlingNetworkAPI     = (*TelegramClient)(nil)
+	_ bridgev2.RoomNameHandlingNetworkAPI       = (*TelegramClient)(nil)
 )
 
 func getMediaFilename(content *event.MessageEventContent) (filename string) {
@@ -856,3 +857,40 @@ func (t *TelegramClient) HandleMatrixDeleteChat(ctx context.Context, chat *bridg
 	}
 	return nil
 }
+
+func (t *TelegramClient) HandleMatrixRoomName(ctx context.Context, msg *bridgev2.MatrixRoomName) (bool, error) {
+	peerType, id, err := ids.ParsePortalID(msg.Portal.ID)
+	if err != nil {
+		return false, err
+	}
+
+	switch peerType {
+	case ids.PeerTypeChat:
+		_, err = t.client.API().MessagesEditChatTitle(ctx, &tg.MessagesEditChatTitleRequest{
+			ChatID: id,
+			Title:  msg.Content.Name,
+		})
+		if err != nil {
+			return false, err
+		}
+		return true, nil
+	case ids.PeerTypeChannel:
+		accessHash, err := t.ScopedStore.GetAccessHash(ctx, peerType, id)
+		if err != nil {
+			return false, err
+		}
+		_, err = t.client.API().ChannelsEditTitle(ctx, &tg.ChannelsEditTitleRequest{
+			Channel: &tg.InputChannel{
+				ChannelID:  id,
+				AccessHash: accessHash,
+			},
+			Title: msg.Content.Name,
+		})
+		if err != nil {
+			return false, err
+		}
+		return true, nil
+	default:
+		return false, fmt.Errorf("unsupported peer type %s for changing room name", peerType)
+	}
+}