From 43f639dbc5363e9df92f44a9dafe14f47d8b979d Mon Sep 17 00:00:00 2001
From: Lukas Frank <lukas.frank@sap.com>
Date: Tue, 28 Mar 2023 16:02:36 +0200
Subject: [PATCH] `ori-volume` mock server

---
 ori/testing/volume/fake.go | 157 +++++++++++++++++++++++++++++++++++++
 1 file changed, 157 insertions(+)
 create mode 100644 ori/testing/volume/fake.go

diff --git a/ori/testing/volume/fake.go b/ori/testing/volume/fake.go
new file mode 100644
index 000000000..4d739310d
--- /dev/null
+++ b/ori/testing/volume/fake.go
@@ -0,0 +1,157 @@
+// Copyright 2022 OnMetal 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 volume
+
+import (
+	"context"
+	"crypto/rand"
+	"encoding/hex"
+	"strconv"
+	"sync"
+	"time"
+
+	ori "github.com/onmetal/onmetal-api/ori/apis/volume/v1alpha1"
+	"google.golang.org/grpc/codes"
+	"google.golang.org/grpc/status"
+	"k8s.io/apimachinery/pkg/labels"
+)
+
+func filterInLabels(labelSelector, lbls map[string]string) bool {
+	return labels.SelectorFromSet(labelSelector).Matches(labels.Set(lbls))
+}
+
+const defaultIDLength = 63
+
+func generateID(length int) string {
+	data := make([]byte, (length/2)+1)
+	for {
+		_, _ = rand.Read(data)
+		id := hex.EncodeToString(data)
+
+		// Truncated versions of the id should not be numerical.
+		if _, err := strconv.ParseInt(id[:12], 10, 64); err != nil {
+			continue
+		}
+
+		return id[:length]
+	}
+}
+
+type FakeVolume struct {
+	ori.Volume
+}
+
+type FakeVolumeClass struct {
+	ori.VolumeClass
+}
+
+type FakeRuntimeService struct {
+	sync.Mutex
+
+	Volumes       map[string]*FakeVolume
+	VolumeClasses map[string]*FakeVolumeClass
+}
+
+func NewFakeRuntimeService() *FakeRuntimeService {
+	return &FakeRuntimeService{
+		Volumes:       make(map[string]*FakeVolume),
+		VolumeClasses: make(map[string]*FakeVolumeClass),
+	}
+}
+
+func (r *FakeRuntimeService) SetVolumes(volumes []*FakeVolume) {
+	r.Lock()
+	defer r.Unlock()
+
+	r.Volumes = make(map[string]*FakeVolume)
+	for _, volume := range volumes {
+		r.Volumes[volume.Metadata.Id] = volume
+	}
+}
+
+func (r *FakeRuntimeService) SetVolumeClasses(volumeClasses []*FakeVolumeClass) {
+	r.Lock()
+	defer r.Unlock()
+
+	r.VolumeClasses = make(map[string]*FakeVolumeClass)
+	for _, volumeClass := range volumeClasses {
+		r.VolumeClasses[volumeClass.Name] = volumeClass
+	}
+}
+
+func (r *FakeRuntimeService) ListVolumes(ctx context.Context, req *ori.ListVolumesRequest) (*ori.ListVolumesResponse, error) {
+	r.Lock()
+	defer r.Unlock()
+
+	filter := req.Filter
+
+	var res []*ori.Volume
+	for _, v := range r.Volumes {
+		if filter != nil {
+			if filter.Id != "" && filter.Id != v.Metadata.Id {
+				continue
+			}
+			if filter.LabelSelector != nil && !filterInLabels(filter.LabelSelector, v.Metadata.Labels) {
+				continue
+			}
+		}
+
+		volume := v.Volume
+		res = append(res, &volume)
+	}
+	return &ori.ListVolumesResponse{Volumes: res}, nil
+}
+
+func (r *FakeRuntimeService) CreateVolume(ctx context.Context, req *ori.CreateVolumeRequest) (*ori.CreateVolumeResponse, error) {
+	r.Lock()
+	defer r.Unlock()
+
+	volume := *req.Volume
+	volume.Metadata.Id = generateID(defaultIDLength)
+	volume.Metadata.CreatedAt = time.Now().UnixNano()
+
+	r.Volumes[volume.Metadata.Id] = &FakeVolume{
+		Volume: volume,
+	}
+
+	return &ori.CreateVolumeResponse{
+		Volume: &volume,
+	}, nil
+}
+
+func (r *FakeRuntimeService) DeleteVolume(ctx context.Context, req *ori.DeleteVolumeRequest) (*ori.DeleteVolumeResponse, error) {
+	r.Lock()
+	defer r.Unlock()
+
+	volumeID := req.VolumeId
+	if _, ok := r.Volumes[volumeID]; !ok {
+		return nil, status.Errorf(codes.NotFound, "volume %q not found", volumeID)
+	}
+
+	delete(r.Volumes, volumeID)
+	return &ori.DeleteVolumeResponse{}, nil
+}
+
+func (r *FakeRuntimeService) ListVolumeClasses(ctx context.Context, req *ori.ListVolumeClassesRequest) (*ori.ListVolumeClassesResponse, error) {
+	r.Lock()
+	defer r.Unlock()
+
+	var res []*ori.VolumeClass
+	for _, m := range r.VolumeClasses {
+		volumeClass := m.VolumeClass
+		res = append(res, &volumeClass)
+	}
+	return &ori.ListVolumeClassesResponse{VolumeClasses: res}, nil
+}