feat: add layer definition api

internal/admin/proxy_route.go

@@ -285,7 +285,7 @@ func getStringSliceValues(w http.ResponseWriter, r *http.Request, param string,
 	return defaultValue, true
 }
 
-func getStringableSliceValues[T ~string](w http.ResponseWriter, r *http.Request, param string, defaultValue []T, validate func(string) (T, error)) ([]T, bool) {
+func getStringableSliceValues[T ~string](w http.ResponseWriter, r *http.Request, param string, defaultValue []T, transform func(string) (T, error)) ([]T, bool) {
 	rawValue := r.URL.Query().Get(param)
 
 	if rawValue != "" {
@@ -293,7 +293,7 @@ func getStringableSliceValues[T ~string](w http.ResponseWriter, r *http.Request,
 		values := make([]T, 0, len(rawValues))
 
 		for _, rv := range rawValues {
-			v, err := validate(rv)
+			v, err := transform(rv)
 			if err != nil {
 				logAndCaptureError(r.Context(), "could not parse ids slice param", errors.WithStack(err))
 				api.ErrorResponse(w, http.StatusBadRequest, api.ErrCodeMalformedRequest, nil)