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// Copyright 2018 Envoyproxy 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 conversion contains shared utility functions for converting xDS resources.
package conversion
import (
"errors"
"google.golang.org/protobuf/encoding/protojson"
"google.golang.org/protobuf/proto"
"google.golang.org/protobuf/types/known/structpb"
)
// MessageToStruct encodes a protobuf Message into a Struct. Hilariously, it
// uses JSON as the intermediary
// author:glen@turbinelabs.io
func MessageToStruct(msg proto.Message) (*structpb.Struct, error) {
if msg == nil {
return nil, errors.New("nil message")
}
b, err := (&protojson.MarshalOptions{UseProtoNames: true}).Marshal(msg)
if err != nil {
return nil, err
}
pbs := &structpb.Struct{}
if err := protojson.Unmarshal(b, pbs); err != nil {
return nil, err
}
return pbs, nil
}
// StructToMessage decodes a protobuf Message from a Struct.
func StructToMessage(pbst *structpb.Struct, out proto.Message) error {
if pbst == nil {
return errors.New("nil struct")
}
b, err := (&protojson.MarshalOptions{UseProtoNames: true}).Marshal(pbst)
if err != nil {
return err
}
return protojson.Unmarshal(b, out)
}
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