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>

kube/pkg/openapi/openapi.go

@@ -0,0 +1,102 @@
+/*
+ * Please refer to the LICENSE file in the root directory of the project.
+ * https://github.com/kubesphere/kubesphere/blob/master/LICENSE
+ */
+
+package openapi
+
+import (
+	"fmt"
+	"net/http"
+	"sync/atomic"
+
+	extensionsv1alpha1 "kubesphere.io/api/extensions/v1alpha1"
+)
+
+type Cache[T any] struct {
+	value atomic.Pointer[T]
+}
+
+func (c *Cache[T]) Store(v T) {
+	c.value.Store(&v)
+}
+
+func (c *Cache[T]) Load() T {
+	return *c.value.Load()
+}
+
+type PathHandler interface {
+	Handle(path string, handler http.Handler)
+}
+
+type APIServiceManager interface {
+	AddUpdateApiService(apiService *extensionsv1alpha1.APIService) error
+	UpdateOpenApiSpec(apiServiceName string) error
+	RemoveApiService(apiServiceName string)
+}
+
+type OpenApiAggregatorServices struct {
+	apiService    map[string]ApiService
+	downloaderMap map[string]CacheableDownloader
+	downloader    *Downloader
+}
+
+func NewOpenApiAggregatorServices() *OpenApiAggregatorServices {
+	return &OpenApiAggregatorServices{
+		apiService:    make(map[string]ApiService),
+		downloaderMap: make(map[string]CacheableDownloader),
+		downloader:    NewDownloader(),
+	}
+}
+
+func (o *OpenApiAggregatorServices) AddUpdateApiService(apiService *extensionsv1alpha1.APIService) error {
+	openapiService := NewApiService(apiService)
+	o.apiService[apiService.Name] = openapiService
+
+	if d, ok := o.downloaderMap[apiService.Name]; ok {
+		if err := d.UpdateDownloader(openapiService); err != nil {
+			return err
+		}
+	} else {
+		cacheDownloader, err := NewCacheableDownloader(openapiService, o.downloader)
+		if err != nil {
+			return err
+		}
+		o.downloaderMap[apiService.Name] = cacheDownloader
+	}
+	return nil
+}
+
+func (o *OpenApiAggregatorServices) GetOpenApiSpecV2(apiServiceName string) ([]byte, error) {
+	if d, ok := o.downloaderMap[apiServiceName]; ok {
+		data, err := d.GetV2()
+		if err != nil {
+			return nil, fmt.Errorf("fetch ApiService %s openapi-v2 error: %s", apiServiceName, err)
+		}
+		return data, nil
+	}
+	return nil, fmt.Errorf("update OpenApiSpec failed beaseuse of apiService %s not found", apiServiceName)
+}
+
+func (o *OpenApiAggregatorServices) GetOpenApiSpecV3(apiServiceName string) ([]byte, error) {
+	if d, ok := o.downloaderMap[apiServiceName]; ok {
+		data, err := d.GetV3()
+		if err != nil {
+			return nil, fmt.Errorf("fetch ApiService %s openapi-v3 error: %s", apiServiceName, err)
+		}
+		return data, nil
+	}
+	return nil, fmt.Errorf("update OpenApiSpec failed beaseuse of apiService %s not found", apiServiceName)
+}
+
+func (o *OpenApiAggregatorServices) AddLocalApiService(name string) {
+	apiService := extensionsv1alpha1.APIService{}
+	apiService.Name = name
+
+	o.apiService[apiService.Name] = NewApiService(&apiService)
+}
+
+func (o *OpenApiAggregatorServices) RemoveApiService(apiServiceName string) {
+	delete(o.apiService, apiServiceName)
+	delete(o.downloaderMap, apiServiceName)
+}