Add realtime gateway and simulator bridge

realtime-gateway/internal/gateway/channel_api.go

@@ -0,0 +1,58 @@
+package gateway
+
+import (
+	"encoding/json"
+	"net/http"
+
+	"realtime-gateway/internal/channel"
+)
+
+type createChannelRequest struct {
+	Label        string `json:"label"`
+	DeliveryMode string `json:"deliveryMode"`
+	TTLSeconds   int    `json:"ttlSeconds"`
+}
+
+func (s *Server) registerChannelRoutes(mux *http.ServeMux) {
+	mux.HandleFunc("/api/channel/create", s.handleCreateChannel)
+	mux.HandleFunc("/api/admin/channels", s.handleAdminChannels)
+}
+
+func (s *Server) handleCreateChannel(w http.ResponseWriter, r *http.Request) {
+	if r.Method != http.MethodPost {
+		writeJSON(w, http.StatusMethodNotAllowed, map[string]any{
+			"error": "method not allowed",
+		})
+		return
+	}
+
+	var request createChannelRequest
+	if err := json.NewDecoder(r.Body).Decode(&request); err != nil {
+		writeJSON(w, http.StatusBadRequest, map[string]any{
+			"error": "invalid json body",
+		})
+		return
+	}
+
+	created, err := s.channels.Create(channel.CreateRequest{
+		Label:        request.Label,
+		DeliveryMode: request.DeliveryMode,
+		TTLSeconds:   request.TTLSeconds,
+	})
+	if err != nil {
+		writeJSON(w, http.StatusInternalServerError, map[string]any{
+			"error": err.Error(),
+		})
+		return
+	}
+
+	writeJSON(w, http.StatusOK, created)
+}
+
+func (s *Server) handleAdminChannels(w http.ResponseWriter, _ *http.Request) {
+	items := s.channels.List()
+	writeJSON(w, http.StatusOK, map[string]any{
+		"items": items,
+		"count": len(items),
+	})
+}