save "create sync group" table in database

internal/site/response/mux.go

@@ -0,0 +1,34 @@
+package response
+
+import "net/http"
+
+type (
+	Mux struct {
+		Mux        *http.ServeMux
+		middleware []Middleware
+	}
+
+	Middleware = func(HandlerFunc) HandlerFunc
+)
+
+func NewMux(ms ...Middleware) *Mux {
+	return &Mux{
+		Mux:        http.NewServeMux(),
+		middleware: ms,
+	}
+}
+
+func (m *Mux) Handle(pattern string, fn HandlerFunc) {
+	for _, mw := range m.middleware {
+		prev := fn
+		fn = mw(func(r *http.Request) (Response, error) {
+			return prev(r)
+		})
+	}
+
+	m.Mux.Handle(pattern, Handler(fn))
+}
+
+func (m *Mux) ServeHTTP(w http.ResponseWriter, r *http.Request) {
+	m.Mux.ServeHTTP(w, r)
+}

internal/site/response/write.go

@@ -48,6 +48,10 @@ func Write(w http.ResponseWriter, r *http.Request, res Response) {
 }
 
 func WriteError(w http.ResponseWriter, err error) {
+	http.Error(w, err.Error(), GetStatusFromError(err))
+}
+
+func GetStatusFromError(err error) int {
 	status := http.StatusInternalServerError
 
 	if e, ok := GetError(err); ok {
@@ -56,5 +60,5 @@ func WriteError(w http.ResponseWriter, err error) {
 		}
 	}
 
-	http.Error(w, err.Error(), status)
+	return status
 }