text: /**
   * Copyright 2017, Google, Inc.
   * 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.
   */
  
  /**
   * @fileoverview Utilities for converting between JSON and goog.protobuf.Struct
   * proto.
   */
  
   'use strict';
  
   function jsonToStructProto(json) {
       const fields = {};
       for (let k in json) {
           fields[k] = jsonValueToProto(json[k]);
       }
   
       return {fields};
   }
   
   const JSON_SIMPLE_TYPE_TO_PROTO_KIND_MAP = {
       [typeof 0]: 'numberValue',
       [typeof '']: 'stringValue',
       [typeof false]: 'boolValue',
   };
   
   const JSON_SIMPLE_VALUE_KINDS = new Set([
       'numberValue',
       'stringValue',
       'boolValue',
   ]);
   
   function jsonValueToProto(value) {
       const valueProto = {};
   
       if (value === null) {
           valueProto.kind = 'nullValue';
           valueProto.nullValue = 'NULL_VALUE';
       } else if (value instanceof Array) {
           valueProto.kind = 'listValue';
           valueProto.listValue = {values: value.map(jsonValueToProto)};
       } else if (typeof value === 'object') {
           valueProto.kind = 'structValue';
           valueProto.structValue = jsonToStructProto(value);
       } else if (typeof value in JSON_SIMPLE_TYPE_TO_PROTO_KIND_MAP) {
           const kind = JSON_SIMPLE_TYPE_TO_PROTO_KIND_MAP[typeof value];
           valueProto.kind = kind;
           valueProto[kind] = value;
       } else {
           console.warn('Unsupported value type ', typeof value);
       }
       return valueProto;
   }
   
   function structProtoToJson(proto) {
       if (!proto || !proto.fields) {
           return {};
       }
       const json = {};
       for (const k in proto.fields) {
           json[k] = valueProtoToJson(proto.fields[k]);
       }
       return json;
   }
   
   function valueProtoToJson(proto) {
       if (!proto || !proto.kind) {
           return null;
       }
   
       if (JSON_SIMPLE_VALUE_KINDS.has(proto.kind)) {
           return proto[proto.kind];
       } else if (proto.kind === 'nullValue') {
           return null;
       } else if (proto.kind === 'listValue') {
           if (!proto.listValue || !proto.listValue.values) {
               console.warn('Invalid JSON list value proto: ', JSON.stringify(proto));
           }
           return proto.listValue.values.map(valueProtoToJson);
       } else if (proto.kind === 'structValue') {
           return structProtoToJson(proto.structValue);
       } else {
           console.warn('Unsupported JSON value proto kind: ', proto.kind);
           return null;
       }
   }
   
   module.exports = {
       jsonToStructProto,
       structProtoToJson,
   };