feat: kubesphere 4.0 (#6115)

* feat: kubesphere 4.0

Signed-off-by: ci-bot <ci-bot@kubesphere.io>

* feat: kubesphere 4.0

Signed-off-by: ci-bot <ci-bot@kubesphere.io>

---------

Signed-off-by: ci-bot <ci-bot@kubesphere.io>
Co-authored-by: ks-ci-bot <ks-ci-bot@example.com>
Co-authored-by: joyceliu <joyceliu@yunify.com>

pkg/controller/openapi/openapi_controller.go

@@ -0,0 +1,69 @@
+/*
+ * Please refer to the LICENSE file in the root directory of the project.
+ * https://github.com/kubesphere/kubesphere/blob/master/LICENSE
+ */
+
+package openapi
+
+import (
+	"context"
+	"fmt"
+
+	toolscache "k8s.io/client-go/tools/cache"
+	"k8s.io/klog/v2"
+	runtimecache "sigs.k8s.io/controller-runtime/pkg/cache"
+
+	extensionsv1alpha1 "kubesphere.io/api/extensions/v1alpha1"
+
+	"kubesphere.io/kubesphere/kube/pkg/openapi"
+)
+
+var SharedOpenAPIController = NewController()
+
+type Controller struct{}
+
+func NewController() *Controller {
+	return &Controller{}
+}
+
+func (c *Controller) WatchOpenAPIChanges(ctx context.Context, cache runtimecache.Cache, openAPIV2Service openapi.APIServiceManager, openAPIV3Service openapi.APIServiceManager) error {
+	informer, err := cache.GetInformer(ctx, &extensionsv1alpha1.APIService{})
+	if err != nil {
+		return fmt.Errorf("get informer failed: %w", err)
+	}
+	_, err = informer.AddEventHandler(toolscache.FilteringResourceEventHandler{
+		FilterFunc: func(obj interface{}) bool {
+			apiService := obj.(*extensionsv1alpha1.APIService)
+			return apiService.Status.State == extensionsv1alpha1.StateAvailable
+		},
+		Handler: &toolscache.ResourceEventHandlerFuncs{
+			AddFunc: func(obj interface{}) {
+				apiService := obj.(*extensionsv1alpha1.APIService)
+				if err := openAPIV2Service.AddUpdateApiService(apiService); err != nil {
+					klog.Error(err)
+				}
+				if err := openAPIV3Service.AddUpdateApiService(apiService); err != nil {
+					klog.Error(err)
+				}
+			},
+			UpdateFunc: func(old, new interface{}) {
+				apiService := new.(*extensionsv1alpha1.APIService)
+				if err := openAPIV2Service.AddUpdateApiService(apiService); err != nil {
+					klog.Error(err)
+				}
+				if err := openAPIV3Service.AddUpdateApiService(apiService); err != nil {
+					klog.Error(err)
+				}
+			},
+			DeleteFunc: func(obj interface{}) {
+				apiService := obj.(*extensionsv1alpha1.APIService)
+				openAPIV2Service.RemoveApiService(apiService.Name)
+				openAPIV3Service.RemoveApiService(apiService.Name)
+			},
+		},
+	})
+	if err != nil {
+		return fmt.Errorf("add event handler failed: %w", err)
+	}
+	return nil
+}