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'use strict';
const MongooseError = require('../../error/mongooseError');const isMongooseObject = require('../isMongooseObject');const setDottedPath = require('../path/setDottedPath');const util = require('util');
/** * Given an object that may contain dotted paths, flatten the paths out. * For example: `flattenObjectWithDottedPaths({ a: { 'b.c': 42 } })` => `{ a: { b: { c: 42 } } }` */
module.exports = function flattenObjectWithDottedPaths(obj) {  if (obj == null || typeof obj !== 'object' || Array.isArray(obj)) {    return;  }  // Avoid Mongoose docs, like docs and maps, because these may cause infinite recursion  if (isMongooseObject(obj)) {    return;  }  const keys = Object.keys(obj);  for (const key of keys) {    const val = obj[key];    if (key.indexOf('.') !== -1) {      try {        delete obj[key];        setDottedPath(obj, key, val);      } catch (err) {        if (!(err instanceof TypeError)) {          throw err;        }        throw new MongooseError(`Conflicting dotted paths when setting document path, key: "${key}", value: ${util.inspect(val)}`);      }      continue;    }
    flattenObjectWithDottedPaths(obj[key]);  }};