pkg/asset/proto_util.go

// Copyright 2019 Google LLC
//
// 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 asset

import (
	"google.golang.org/protobuf/types/known/structpb"
)

// CleanProtoValue recursively updates proto Values that have a nil .Kind field
// to be a NullValue to avoid issues with the jsonpb.Marshaler.
// This issue arose when calling GCV from python.
func CleanProtoValue(v *structpb.Value) {
	if v == nil {
		return
	}
	switch t := v.Kind.(type) {
	case *structpb.Value_NullValue, *structpb.Value_NumberValue, *structpb.Value_StringValue, *structpb.Value_BoolValue:
	case *structpb.Value_StructValue:
		CleanStructValue(t.StructValue)
	case *structpb.Value_ListValue:
		if list := t.ListValue; list != nil {
			for i := range list.Values {
				CleanProtoValue(list.Values[i])
			}
		}
	default: // No other kinds should be allowed (including nil).
		v.Kind = &structpb.Value_NullValue{}
	}
}

func CleanStructValue(s *structpb.Struct) {
	if s == nil {
		return
	}
	for k := range s.Fields {
		CleanProtoValue(s.Fields[k])
	}
}