layer1: add namespace event bridge step 18

doc/thinking/2026-04-26-namespace-manager-step18.md

@@ -0,0 +1,15 @@
+# 2026-04-26 — NamespaceManager rewrite, step 18
+
+## Цель шага
+
+Подготовить watcher-friendly helper для преобразования Kubernetes Namespace в `NamespaceEvent`.
+
+## Что меняем
+
+1. Добавляем `NamespaceEventFromNamespace()`.
+2. Добавляем unit tests на перенос имени и labels.
+
+## Что НЕ меняем
+
+- не подключаем helper к watcher-ам;
+- не меняем runtime behavior.

pkg/utils/namespace.go

@@ -13,11 +13,11 @@ import (
 )
 
 const (
-	ENV_FUNCTION_NAMESPACE   string = "FISSION_FUNCTION_NAMESPACE"
-	ENV_BUILDER_NAMESPACE    string = "FISSION_BUILDER_NAMESPACE"
-	ENV_DEFAULT_NAMESPACE    string = "FISSION_DEFAULT_NAMESPACE"
-	ENV_ADDITIONAL_NAMESPACE string = "FISSION_RESOURCE_NAMESPACES"
-	ManagedNamespaceLabelKey string = "fission.io/managed"
+	ENV_FUNCTION_NAMESPACE     string = "FISSION_FUNCTION_NAMESPACE"
+	ENV_BUILDER_NAMESPACE      string = "FISSION_BUILDER_NAMESPACE"
+	ENV_DEFAULT_NAMESPACE      string = "FISSION_DEFAULT_NAMESPACE"
+	ENV_ADDITIONAL_NAMESPACE   string = "FISSION_RESOURCE_NAMESPACES"
+	ManagedNamespaceLabelKey   string = "fission.io/managed"
 	ManagedNamespaceLabelValue string = "true"
 )
 

pkg/utils/namespace_manager_model.go

@@ -1,6 +1,10 @@
 package utils
 
-import "time"
+import (
+	"time"
+
+	corev1 "k8s.io/api/core/v1"
+)
 
 const (
 	NamespacePartStateRegistering string = "registering"
@@ -77,6 +81,13 @@ func ManagedNamespaceEvent(eventType NamespaceEventType, name string, source Nam
 	}, source, observedAt)
 }
 
+func NamespaceEventFromNamespace(eventType NamespaceEventType, namespace *corev1.Namespace, source NamespaceSource, observedAt time.Time) NamespaceEvent {
+	if namespace == nil {
+		return NewNamespaceEvent(eventType, "", nil, source, observedAt)
+	}
+	return NewNamespaceEvent(eventType, namespace.Name, namespace.Labels, source, observedAt)
+}
+
 func (nr NamespaceRecord) Clone() NamespaceRecord {
 	clone := nr
 	clone.Labels = cloneStringMap(nr.Labels)

pkg/utils/namespace_manager_model_test.go

@@ -3,6 +3,8 @@ package utils
 import (
 	"testing"
 	"time"
+
+	corev1 "k8s.io/api/core/v1"
 )
 
 func TestNamespaceRecordClone(t *testing.T) {
@@ -86,3 +88,22 @@ func TestManagedNamespaceEvent(t *testing.T) {
 		t.Fatalf("expected tenant-a event name")
 	}
 }
+
+func TestNamespaceEventFromNamespace(t *testing.T) {
+	namespace := &corev1.Namespace{}
+	namespace.Name = "tenant-a"
+	namespace.Labels = map[string]string{ManagedNamespaceLabelKey: ManagedNamespaceLabelValue}
+
+	event := NamespaceEventFromNamespace(NamespaceEventAdd, namespace, NamespaceSourceWatcher, time.Now().UTC())
+	if event.Name != "tenant-a" {
+		t.Fatalf("expected tenant-a event name")
+	}
+	if event.Labels[ManagedNamespaceLabelKey] != ManagedNamespaceLabelValue {
+		t.Fatalf("expected namespace labels to be copied into event")
+	}
+
+	namespace.Labels[ManagedNamespaceLabelKey] = "false"
+	if event.Labels[ManagedNamespaceLabelKey] != ManagedNamespaceLabelValue {
+		t.Fatalf("expected event labels to stay detached from original namespace")
+	}
+}