working epics ioc and tested

internal/api/api.go

@@ -45,6 +45,8 @@ func (h *Handler) Register(mux *http.ServeMux, prefix string) {
 	// Synthetic signal CRUD
 	mux.HandleFunc("GET "+prefix+"/synthetic", h.listSynthetic)
 	mux.HandleFunc("POST "+prefix+"/synthetic", h.createSynthetic)
+	mux.HandleFunc("GET "+prefix+"/synthetic/{name}", h.getSynthetic)
+	mux.HandleFunc("PUT "+prefix+"/synthetic/{name}", h.updateSynthetic)
 	mux.HandleFunc("DELETE "+prefix+"/synthetic/{name}", h.deleteSynthetic)
 }
 
@@ -307,6 +309,48 @@ func (h *Handler) createSynthetic(w http.ResponseWriter, r *http.Request) {
 	jsonOK(w, def)
 }
 
+func (h *Handler) getSynthetic(w http.ResponseWriter, r *http.Request) {
+	if h.synthetic == nil {
+		jsonError(w, http.StatusServiceUnavailable, "synthetic data source not enabled")
+		return
+	}
+	name := r.PathValue("name")
+	def, err := h.synthetic.GetSignal(name)
+	if err != nil {
+		if errors.Is(err, datasource.ErrNotFound) {
+			jsonError(w, http.StatusNotFound, "synthetic signal not found: "+name)
+		} else {
+			jsonError(w, http.StatusInternalServerError, err.Error())
+		}
+		return
+	}
+	jsonOK(w, def)
+}
+
+func (h *Handler) updateSynthetic(w http.ResponseWriter, r *http.Request) {
+	if h.synthetic == nil {
+		jsonError(w, http.StatusServiceUnavailable, "synthetic data source not enabled")
+		return
+	}
+	name := r.PathValue("name")
+	var def synthetic.SignalDef
+	if err := json.NewDecoder(r.Body).Decode(&def); err != nil {
+		jsonError(w, http.StatusBadRequest, "invalid JSON: "+err.Error())
+		return
+	}
+	// Ensure the name in the URL matches the body (or fill it in).
+	def.Name = name
+	if err := h.synthetic.UpdateSignal(def); err != nil {
+		if errors.Is(err, datasource.ErrNotFound) {
+			jsonError(w, http.StatusNotFound, "synthetic signal not found: "+name)
+		} else {
+			jsonError(w, http.StatusBadRequest, err.Error())
+		}
+		return
+	}
+	jsonOK(w, def)
+}
+
 func (h *Handler) deleteSynthetic(w http.ResponseWriter, r *http.Request) {
 	if h.synthetic == nil {
 		jsonError(w, http.StatusServiceUnavailable, "synthetic data source not enabled")