use indented json in ONM.String()

to be consistent with the logged request/CGREvent. only used by logs

utils/coreutils_test.go

@@ -2017,6 +2017,27 @@ func TestGetEndOfMonth(t *testing.T) {
 	}
 }
 
+// go test ./utils/ -bench BenchmarkToJSON -benchtime=1s -benchmem
+func BenchmarkToJSON(b *testing.B) {
+	v := map[string]any{
+		"Result-Code": "2001",
+		"Granted-Service-Unit": map[string]any{
+			"CC-Time": 300,
+		},
+		"Session-Id": "cgrates;1052943642;938",
+	}
+	b.Run("ToJSON", func(b *testing.B) {
+		for b.Loop() {
+			ToJSON(v)
+		}
+	})
+	b.Run("ToIJSON", func(b *testing.B) {
+		for b.Loop() {
+			ToIJSON(v)
+		}
+	})
+}
+
 func TestParseBinarySize(t *testing.T) {
 	type args struct {
 		size string

utils/orderednavigablemap.go

@@ -42,7 +42,7 @@ type OrderedNavigableMap struct {
 
 // String returns the map as json string
 func (onm *OrderedNavigableMap) String() string {
-	return ToJSON(onm.nm)
+	return ToIJSON(onm.nm)
 }
 
 // GetFirstElement returns the first element from the order

utils/orderednavigablemap_test.go

@@ -892,7 +892,15 @@ func TestOrderedNavigableMapString(t *testing.T) {
 			},
 		},
 	}
-	onmExpect := `{"Map":{"test1":{"Value":{"Data":"data!"}}}}`
+	onmExpect := `{
+ "Map": {
+  "test1": {
+   "Value": {
+    "Data": "data!"
+   }
+  }
+ }
+}`
 	if onm.String() != onmExpect {
 		t.Errorf("Expected %s but received %s", onmExpect, onm.String())
 	}