feat: add exact name predicate (#149)

* feat: add exact name predicate

* allow namespace wildcard for exact name predicate

Author: Diaphteiros

pkg/controller/predicates.go

@@ -217,3 +217,18 @@ func (p StatusChangedPredicate) Update(e event.UpdateEvent) bool {
 	}
 	return !reflect.DeepEqual(oldStatus, newStatus)
 }
+
+////////////////////////////////////
+/// IDENTITY MATCHING PREDICATES ///
+////////////////////////////////////
+
+// ExactNamePredicate returns true if the object's name and namespace exactly match the specified values.
+// The namespace can be set to '*' to match any namespace.
+func ExactNamePredicate(name, namespace string) predicate.Predicate {
+	return predicate.NewPredicateFuncs(func(obj client.Object) bool {
+		if obj == nil {
+			return false
+		}
+		return obj.GetName() == name && (namespace == "*" || obj.GetNamespace() == namespace)
+	})
+}

pkg/controller/predicates_test.go

@@ -234,6 +234,25 @@ var _ = Describe("Predicates", func() {
 
 	})
 
+	Context("Identity", func() {
+
+		It("should match resources with the specified identity", func() {
+			p := ctrlutils.ExactNamePredicate("foo", "bar")
+			e := event.CreateEvent{Object: base}
+			Expect(p.Create(e)).To(BeTrue())
+
+			p2 := ctrlutils.ExactNamePredicate("foo", "")
+			Expect(p2.Create(e)).To(BeFalse())
+
+			p3 := ctrlutils.ExactNamePredicate("foo", "baz")
+			Expect(p3.Create(e)).To(BeFalse())
+
+			p4 := ctrlutils.ExactNamePredicate("foo", "*")
+			Expect(p4.Create(e)).To(BeTrue())
+		})
+
+	})
+
 })
 
 func updateEvent(old, new client.Object) event.UpdateEvent {