feat(server): add active client tracking and conditional reconnection

internal/server/server.go

@@ -30,6 +30,7 @@ type Server struct {
 	streamPumps    map[uint16]net.Conn
 	pumpMu         sync.Mutex
 	peerIdx        atomic.Uint32
+	activeClients  atomic.Int32
 	wg             sync.WaitGroup
 	dnsServer      string
 	dnsCache       sync.Map
@@ -171,6 +172,10 @@ func Run(ctx context.Context, roomURL, keyHex string, duo bool, dnsServer, socks
 			log.Println("Server multiplexer reset complete")
 		})
 
+		peer.SetShouldReconnect(func() bool {
+			return s.activeClients.Load() > 0
+		})
+
 		log.Printf("Connecting peer %d to Telemost...", peerID)
 		if err := peer.Connect(runCtx); err != nil {
 			return err
@@ -414,11 +419,13 @@ func (s *Server) handleConnect(ctx context.Context, sid uint16, req ConnectReque
 
 	log.Printf("[SERVER] sid=%d CONNECT_SUCCESS dial_time=%v", sid, dialElapsed)
 
+	s.activeClients.Add(1)
 	s.mux.SendData(sid, []byte{0x00})
 	s.startStreamPump(ctx, sid, conn)
 
 	go func() {
 		defer func() {
+			s.activeClients.Add(-1)
 			s.mux.CloseStream(sid)
 			s.connMu.Lock()
 			delete(s.connections, sid)

internal/telemost/peer.go

@@ -44,6 +44,7 @@ type Peer struct {
 	dc              *webrtc.DataChannel
 	onData          func([]byte)
 	onReconnect     func(*webrtc.DataChannel)
+	shouldReconnect func() bool
 	reconnectCh     chan struct{}
 	closeCh         chan struct{}
 	keepAliveCh     chan struct{}
@@ -131,6 +132,10 @@ func (p *Peer) queueReconnect() {
 	if p.closed.Load() || p.reconnecting.Load() {
 		return
 	}
+	if p.shouldReconnect != nil && !p.shouldReconnect() {
+		log.Println("Reconnect skipped: shouldReconnect returned false")
+		return
+	}
 	select {
 	case p.reconnectCh <- struct{}{}:
 	default:
@@ -983,6 +988,10 @@ func (p *Peer) SetReconnectCallback(cb func(*webrtc.DataChannel)) {
 	p.onReconnect = cb
 }
 
+func (p *Peer) SetShouldReconnect(fn func() bool) {
+	p.shouldReconnect = fn
+}
+
 func (p *Peer) WatchConnection(ctx context.Context) {
 	const maxReconnects = 10
 	const reconnectWindow = 5 * time.Minute