layer1: add namespace tombstone helper step 34

pkg/utils/namespace_manager_model.go

@@ -4,6 +4,7 @@ import (
 	"time"
 
 	corev1 "k8s.io/api/core/v1"
+	k8sCache "k8s.io/client-go/tools/cache"
 )
 
 const (
@@ -88,6 +89,32 @@ func NamespaceEventFromNamespace(eventType NamespaceEventType, namespace *corev1
 	return NewNamespaceEvent(eventType, namespace.Name, namespace.Labels, source, observedAt)
 }
 
+func NamespaceFromObject(obj interface{}) (*corev1.Namespace, bool) {
+	switch typed := obj.(type) {
+	case *corev1.Namespace:
+		return typed, true
+	case k8sCache.DeletedFinalStateUnknown:
+		namespace, ok := typed.Obj.(*corev1.Namespace)
+		return namespace, ok
+	case *k8sCache.DeletedFinalStateUnknown:
+		if typed == nil {
+			return nil, false
+		}
+		namespace, ok := typed.Obj.(*corev1.Namespace)
+		return namespace, ok
+	default:
+		return nil, false
+	}
+}
+
+func NamespaceEventFromObject(eventType NamespaceEventType, obj interface{}, source NamespaceSource, observedAt time.Time) NamespaceEvent {
+	namespace, ok := NamespaceFromObject(obj)
+	if !ok {
+		return NewNamespaceEvent(eventType, "", nil, source, observedAt)
+	}
+	return NamespaceEventFromNamespace(eventType, namespace, source, observedAt)
+}
+
 func (nr NamespaceRecord) Clone() NamespaceRecord {
 	clone := nr
 	clone.Labels = cloneStringMap(nr.Labels)