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package api
import (
"log/slog"
"net/http"
"sync"
"golang.org/x/net/websocket"
)
// Hub manages WebSocket connections and broadcasts messages.
type Hub struct {
mu sync.RWMutex
clients map[*websocket.Conn]bool
logger *slog.Logger
}
func NewHub() *Hub {
return &Hub{
clients: make(map[*websocket.Conn]bool),
logger: slog.Default(),
}
}
// Run is a no-op loop kept for future cleanup/heartbeat logic.
func (h *Hub) Run() {}
func (h *Hub) Register(ws *websocket.Conn) {
h.mu.Lock()
h.clients[ws] = true
h.mu.Unlock()
}
func (h *Hub) Unregister(ws *websocket.Conn) {
h.mu.Lock()
delete(h.clients, ws)
h.mu.Unlock()
}
// Broadcast sends a message to all connected WebSocket clients.
func (h *Hub) Broadcast(msg []byte) {
h.mu.RLock()
defer h.mu.RUnlock()
for conn := range h.clients {
if _, err := conn.Write(msg); err != nil {
h.logger.Error("websocket write error", "error", err)
}
}
}
// ClientCount returns the number of connected clients.
func (h *Hub) ClientCount() int {
h.mu.RLock()
defer h.mu.RUnlock()
return len(h.clients)
}
func (s *Server) handleWebSocket(w http.ResponseWriter, r *http.Request) {
handler := websocket.Handler(func(ws *websocket.Conn) {
s.hub.Register(ws)
defer s.hub.Unregister(ws)
// Keep connection alive until client disconnects.
buf := make([]byte, 1024)
for {
if _, err := ws.Read(buf); err != nil {
break
}
}
})
handler.ServeHTTP(w, r)
}
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