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// Copyright 2017 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 protostruct supports operations on the protocol buffer Struct message.
package protostruct
import (
pb "github.com/golang/protobuf/ptypes/struct"
)
// DecodeToMap converts a pb.Struct to a map from strings to Go types.
// DecodeToMap panics if s is invalid.
func DecodeToMap(s *pb.Struct) map[string]interface{} {
if s == nil {
return nil
}
m := map[string]interface{}{}
for k, v := range s.Fields {
m[k] = decodeValue(v)
}
return m
}
func decodeValue(v *pb.Value) interface{} {
switch k := v.Kind.(type) {
case *pb.Value_NullValue:
return nil
case *pb.Value_NumberValue:
return k.NumberValue
case *pb.Value_StringValue:
return k.StringValue
case *pb.Value_BoolValue:
return k.BoolValue
case *pb.Value_StructValue:
return DecodeToMap(k.StructValue)
case *pb.Value_ListValue:
s := make([]interface{}, len(k.ListValue.Values))
for i, e := range k.ListValue.Values {
s[i] = decodeValue(e)
}
return s
default:
panic("protostruct: unknown kind")
}
}
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