//  Copyright 2018 Istio Authors
//
//  Licensed under the Apache License, Version 2.0 (the "License");
//  you may not use this file except in compliance with the License.
//  You may obtain a copy of the License at
//
//      http://www.apache.org/licenses/LICENSE-2.0
//
//  Unless required by applicable law or agreed to in writing, software
//  distributed under the License is distributed on an "AS IS" BASIS,
//  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
//  See the License for the specific language governing permissions and
//  limitations under the License.

package resource

import (
	"k8s.io/apimachinery/pkg/apis/meta/v1/unstructured"

	"istio.io/istio/galley/pkg/common"
)

// rewrite does a generic rewrite of an unstructured custom resource.
func rewrite(source *unstructured.Unstructured, apiVersion string) *unstructured.Unstructured {
	modified := source.DeepCopy()

	annotations := modified.GetAnnotations()

	if annotations != nil {
		delete(annotations, common.KubectlLastAppliedConfiguration)
	} else {
		annotations = make(map[string]string, 1)
	}
	annotations[common.AnnotationKeySyncedAtVersion] = source.GetResourceVersion()

	modified.SetAnnotations(annotations)

	modified.SetResourceVersion("")
	modified.SetUID("")
	modified.SetSelfLink("")
	modified.SetAPIVersion(apiVersion)

	return modified
}
