util.go

/*

 Copyright 2021 The KubeSphere 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 quota

import (
	"context"
	corev1 "k8s.io/api/core/v1"
	"k8s.io/apimachinery/pkg/labels"
	"k8s.io/apimachinery/pkg/types"
	quotav1alpha2 "kubesphere.io/kubesphere/pkg/apis/quota/v1alpha2"
	"sigs.k8s.io/controller-runtime/pkg/client"
)

// Following code copied from github.com/openshift/library-go/pkg/quota/quotautil
func getResourceQuotasStatusByNamespace(namespaceStatuses quotav1alpha2.ResourceQuotasStatusByNamespace, namespace string) (corev1.ResourceQuotaStatus, bool) {
	for i := range namespaceStatuses {
		curr := namespaceStatuses[i]
		if curr.Namespace == namespace {
			return curr.ResourceQuotaStatus, true
		}
	}
	return corev1.ResourceQuotaStatus{}, false
}

func removeResourceQuotasStatusByNamespace(namespaceStatuses *quotav1alpha2.ResourceQuotasStatusByNamespace, namespace string) {
	newNamespaceStatuses := quotav1alpha2.ResourceQuotasStatusByNamespace{}
	for i := range *namespaceStatuses {
		curr := (*namespaceStatuses)[i]
		if curr.Namespace == namespace {
			continue
		}
		newNamespaceStatuses = append(newNamespaceStatuses, curr)
	}
	*namespaceStatuses = newNamespaceStatuses
}

func insertResourceQuotasStatus(namespaceStatuses *quotav1alpha2.ResourceQuotasStatusByNamespace, newStatus quotav1alpha2.ResourceQuotaStatusByNamespace) {
	newNamespaceStatuses := quotav1alpha2.ResourceQuotasStatusByNamespace{}
	found := false
	for i := range *namespaceStatuses {
		curr := (*namespaceStatuses)[i]
		if curr.Namespace == newStatus.Namespace {
			// do this so that we don't change serialization order
			newNamespaceStatuses = append(newNamespaceStatuses, newStatus)
			found = true
			continue
		}
		newNamespaceStatuses = append(newNamespaceStatuses, curr)
	}
	if !found {
		newNamespaceStatuses = append(newNamespaceStatuses, newStatus)
	}
	*namespaceStatuses = newNamespaceStatuses
}

func resourceQuotaNamesFor(ctx context.Context, client client.Client, namespaceName string) ([]string, error) {
	namespace := &corev1.Namespace{}
	var resourceQuotaNames []string
	if err := client.Get(ctx, types.NamespacedName{Name: namespaceName}, namespace); err != nil {
		return resourceQuotaNames, err
	}
	if len(namespace.Labels) == 0 {
		return resourceQuotaNames, nil
	}
	resourceQuotaList := &quotav1alpha2.ResourceQuotaList{}
	if err := client.List(ctx, resourceQuotaList); err != nil {
		return resourceQuotaNames, err
	}
	for _, resourceQuota := range resourceQuotaList.Items {
		if len(resourceQuota.Spec.LabelSelector) > 0 &&
			labels.SelectorFromSet(resourceQuota.Spec.LabelSelector).Matches(labels.Set(namespace.Labels)) {
			resourceQuotaNames = append(resourceQuotaNames, resourceQuota.Name)
		}
	}
	return resourceQuotaNames, nil
}