1 files changed, 108 insertions, 0 deletions
diff --git a/src/k8splugin/internal/app/query.go b/src/k8splugin/internal/app/query.go
new file mode 100644
index 00000000..cb645afd
--- /dev/null
+++ b/src/k8splugin/internal/app/query.go
@@ -0,0 +1,108 @@
+/*
+ * Copyright 2018 Intel Corporation, Inc
+ * Copyright © 2021 Samsung Electronics
+ * Copyright © 2021 Orange
+ *
+ * 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 app
+
+import (
+	"github.com/onap/multicloud-k8s/src/k8splugin/internal/helm"
+	"k8s.io/apimachinery/pkg/runtime/schema"
+
+	pkgerrors "github.com/pkg/errors"
+)
+
+// QueryStatus is what is returned when status is queried for an instance
+type QueryStatus struct {
+	ResourceCount   int32            `json:"resourceCount"`
+	ResourcesStatus []ResourceStatus `json:"resourcesStatus"`
+}
+
+// QueryManager is an interface exposes the instantiation functionality
+type QueryManager interface {
+	Query(namespace, cloudRegion, apiVersion, kind, name, labels, id string) (QueryStatus, error)
+}
+
+// QueryClient implements the InstanceManager interface
+// It will also be used to maintain some localized state
+type QueryClient struct {
+	storeName string
+	tagInst   string
+}
+
+// NewQueryClient returns an instance of the QueryClient
+// which implements the InstanceManager
+func NewQueryClient() *QueryClient {
+	return &QueryClient{
+		storeName: "rbdef",
+		tagInst:   "instance",
+	}
+}
+
+// Query returns state of instance's filtered resources
+func (v *QueryClient) Query(namespace, cloudRegion, apiVersion, kind, name, labels, id string) (QueryStatus, error) {
+
+	//Read the status from the DD
+
+	k8sClient := KubernetesClient{}
+	err := k8sClient.Init(cloudRegion, id)
+	if err != nil {
+		return QueryStatus{}, pkgerrors.Wrap(err, "Getting CloudRegion Information")
+	}
+
+	var resourcesStatus []ResourceStatus
+	if labels != "" {
+		resList, err := k8sClient.queryResources(apiVersion, kind, labels, namespace)
+		if err != nil {
+			return QueryStatus{}, pkgerrors.Wrap(err, "Querying Resources")
+		}
+		// If user specifies both label and name, we want to pick up only single resource from these matching label
+		if name != "" {
+			//Assigning 0-length, because we may actually not find matching name
+			resourcesStatus = make([]ResourceStatus, 0)
+			for _, res := range resList {
+				if res.Name == name {
+					resourcesStatus = append(resourcesStatus, res)
+					break
+				}
+			}
+		} else {
+			resourcesStatus = resList
+		}
+	} else if name != "" {
+		resIdentifier := helm.KubernetesResource{
+			Name: name,
+			GVK:  schema.FromAPIVersionAndKind(apiVersion, kind),
+		}
+		res, err := k8sClient.GetResourceStatus(resIdentifier, namespace)
+		if err != nil {
+			return QueryStatus{}, pkgerrors.Wrap(err, "Querying Resource")
+		}
+		resourcesStatus = []ResourceStatus{res}
+	} else {
+		resList, err := k8sClient.queryResources(apiVersion, kind, labels, namespace)
+		if err != nil {
+			return QueryStatus{}, pkgerrors.Wrap(err, "Querying Resources")
+		}
+		resourcesStatus = resList
+	}
+
+	resp := QueryStatus{
+		ResourceCount:   int32(len(resourcesStatus)),
+		ResourcesStatus: resourcesStatus,
+	}
+	return resp, nil
+}