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/kapis/application/v2/crd2cr.go

@@ -0,0 +1,105 @@
+/*
+ * Please refer to the LICENSE file in the root directory of the project.
+ * https://github.com/kubesphere/kubesphere/blob/master/LICENSE
+ */
+
+package v2
+
+import (
+	"errors"
+	"fmt"
+
+	"github.com/emicklei/go-restful/v3"
+	v1 "k8s.io/apiextensions-apiserver/pkg/apis/apiextensions/v1"
+	"k8s.io/apimachinery/pkg/apis/meta/v1/unstructured"
+	"k8s.io/apimachinery/pkg/runtime/schema"
+	"sigs.k8s.io/controller-runtime/pkg/client"
+
+	"kubesphere.io/kubesphere/pkg/api"
+)
+
+func (h *appHandler) exampleCr(req *restful.Request, resp *restful.Response) {
+	name := req.PathParameter("name")
+	crd := v1.CustomResourceDefinition{}
+	err := h.client.Get(req.Request.Context(), client.ObjectKey{Name: name}, &crd)
+	if err != nil {
+		api.HandleInternalError(resp, nil, err)
+		return
+	}
+	cr, err := convertCRDToCR(crd)
+	if err != nil {
+		api.HandleInternalError(resp, nil, err)
+		return
+	}
+	resp.WriteEntity(cr)
+}
+
+func convertCRDToCR(crd v1.CustomResourceDefinition) (dstCr unstructured.Unstructured, err error) {
+
+	cr := unstructured.Unstructured{}
+	cr.SetName(fmt.Sprintf("%s-Instance", crd.Spec.Names.Singular))
+	cr.SetGroupVersionKind(schema.GroupVersionKind{
+		Group: crd.Spec.Group,
+		Kind:  crd.Spec.Names.Kind,
+	})
+
+	var selectedVersion *v1.CustomResourceDefinitionVersion
+	for _, version := range crd.Spec.Versions {
+		if version.Served && version.Storage {
+			selectedVersion = &version
+			break
+		}
+	}
+	if selectedVersion == nil {
+		return dstCr, errors.New("no served and storage version found in CRD")
+	}
+	cr.SetAPIVersion(selectedVersion.Name)
+
+	generateProps(selectedVersion, cr, "spec")
+	generateProps(selectedVersion, cr, "status")
+
+	return cr, nil
+}
+
+func generateProps(selectedVersion *v1.CustomResourceDefinitionVersion, cr unstructured.Unstructured, name string) {
+	data := make(map[string]any)
+	specProps := selectedVersion.Schema.OpenAPIV3Schema.Properties[name].Properties
+	for key, value := range specProps {
+		data[key] = getDefaultValue(value)
+	}
+	cr.Object[name] = data
+}
+
+func getDefaultValue(value v1.JSONSchemaProps) any {
+	switch value.Type {
+	case "object":
+		return parseObject(value.Properties)
+	case "integer":
+		if value.Minimum != nil {
+			return *value.Minimum
+		}
+		return 0
+	case "boolean":
+		return false
+	case "array":
+		if value.Items.Schema != nil {
+			return []any{getDefaultValue(*value.Items.Schema)}
+		}
+		return []any{}
+	case "string":
+		if len(value.Enum) > 0 {
+			return string(value.Enum[0].Raw)
+		}
+		return ""
+	default:
+		return nil
+	}
+}
+
+func parseObject(obj map[string]v1.JSONSchemaProps) map[string]any {
+	res := make(map[string]any)
+	for key, value := range obj {
+		res[key] = getDefaultValue(value)
+	}
+	return res
+}