Move codes to pkg (#46)

pkg/ingress/kube/util/util.go

@@ -0,0 +1,84 @@
+// Copyright (c) 2022 Alibaba Group Holding Ltd.
+//
+// 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 util
+
+import (
+	"bytes"
+	"crypto/md5"
+	"encoding/hex"
+	"errors"
+	"fmt"
+	"path"
+	"strings"
+
+	"github.com/gogo/protobuf/types"
+	"github.com/golang/protobuf/jsonpb"
+	"github.com/golang/protobuf/proto"
+	"istio.io/istio/pilot/pkg/model"
+)
+
+const DefaultDomainSuffix = "cluster.local"
+
+type ClusterNamespacedName struct {
+	model.NamespacedName
+	ClusterId string
+}
+
+func (c ClusterNamespacedName) String() string {
+	return c.ClusterId + "/" + c.NamespacedName.String()
+}
+
+func SplitNamespacedName(name string) model.NamespacedName {
+	nsName := strings.Split(name, "/")
+	if len(nsName) == 2 {
+		return model.NamespacedName{
+			Namespace: nsName[0],
+			Name:      nsName[1],
+		}
+	}
+
+	return model.NamespacedName{
+		Name: nsName[0],
+	}
+}
+
+// CreateDestinationRuleName create the same format of DR name with ops.
+func CreateDestinationRuleName(istioCluster, namespace, name string) string {
+	format := path.Join(istioCluster, namespace, name)
+	hash := md5.Sum([]byte(format))
+	return hex.EncodeToString(hash[:])
+}
+
+func MessageToGoGoStruct(msg proto.Message) (*types.Struct, error) {
+	if msg == nil {
+		return nil, errors.New("nil message")
+	}
+
+	buf := &bytes.Buffer{}
+	if err := (&jsonpb.Marshaler{OrigName: true}).Marshal(buf, msg); err != nil {
+		return nil, err
+	}
+
+	pbs := &types.Struct{}
+	if err := jsonpb.Unmarshal(buf, pbs); err != nil {
+		return nil, err
+	}
+
+	return pbs, nil
+}
+
+func CreateServiceFQDN(namespace, name string) string {
+	return fmt.Sprintf("%s.%s.svc.%s", name, namespace, DefaultDomainSuffix)
+}