spreadValuesWithKeySeparatedByComma.js

import _ from "lodash"
/**
 *  consider the object
 *
 *  const obj = {
 *    key1: value1
 *    key2: value2
 *    "key3,key4,key5": {key3: value3, key4: value4}
 *  }
 *
 *  spreadValuesWithKeySeparatedByComma(obj) outputs
 *
 *  {
 *    key1: value1,
 *    key2: value2,
 *    key3: value3,
 *    key4: value4,
 *    key5: undefined
 *  }
 *
 */

export default function spreadValuesWithKeySeparatedByComma(obj) {
  if (!_.isPlainObject(obj)) return obj

  const clone = JSON.parse(JSON.stringify(obj))

  return _.entries(clone).reduce((acc, [key, value]) => {
    const isSeparatedByComma = key.split(",").length > 1

    if (isSeparatedByComma && _.isPlainObject(value)) {
      const keys = key.split(",")
      acc = { ...acc, ..._.pick(value, keys) }
    } else {
      acc[key] = value
    }

    return acc
  }, {})
}