feat: support extraction of host string slices

status:
  url:
    - x
    - y

status:
  url: x

pkg/resource/authconfig.go

@@ -142,14 +142,22 @@ func (k *expressionHostExtractor) Extract(target *unstructured.Unstructured) []s
 	hosts := []string{}
 
 	for _, path := range k.paths {
-		host, found, err := unstructured.NestedString(target.Object, strings.Split(path, ".")...)
+		foundHost, found, err := unstructured.NestedString(target.Object, strings.Split(path, ".")...)
 		if err == nil && found {
-			// TODO log err?
-			parsedURL, err := url.Parse(host)
+			parsedURL, err := url.Parse(foundHost)
 			if err == nil {
 				hosts = append(hosts, parsedURL.Host)
 			}
 		}
+		foundHosts, found, err := unstructured.NestedStringSlice(target.Object, strings.Split(path, ".")...)
+		if err == nil && found {
+			for _, foundHost := range foundHosts {
+				parsedURL, err := url.Parse(foundHost)
+				if err == nil {
+					hosts = append(hosts, parsedURL.Host)
+				}
+			}
+		}
 	}
 
 	u := unique(hosts)

pkg/resource/authconfig_test.go

@@ -12,7 +12,7 @@ var _ = Describe("AuthConfig functions", Label(labels.Unit), func() {
 
 	Context("Host extraction", func() {
 
-		It("should extract host from unstructured via paths", func() {
+		It("should extract host from unstructured via paths as string", func() {
 			// given
 			extractor := resource.NewExpressionHostExtractor([]string{"status.url"})
 			target := unstructured.Unstructured{
@@ -30,6 +30,24 @@ var _ = Describe("AuthConfig functions", Label(labels.Unit), func() {
 			Expect(hosts).To(HaveExactElements("test.com"))
 		})
 
+		It("should extract host from unstructured via paths as slice of strings", func() {
+			// given
+			extractor := resource.NewExpressionHostExtractor([]string{"status.url"})
+			target := unstructured.Unstructured{
+				Object: map[string]interface{}{
+					"status": map[string]interface{}{
+						"url": []interface{}{"http://test.com", "http://test2.com"},
+					},
+				},
+			}
+
+			// when
+			hosts := extractor.Extract(&target)
+
+			// then
+			Expect(hosts).To(ContainElements("test.com", "test2.com"))
+		})
+
 	})
 
 })