axios のレスポンスからスネークケースのキーをキャメルケースに変換して、日付をDateTimeオブジェクトにする

axiosInterceptor.ts

import { AxiosResponse } from 'axios';
import { camel } from 'change-case';
import { isArray, isObject, isString } from 'lodash';
import { DateTime } from 'luxon';

export const reform = (
  obj: object,
  keyConverter: (k: string) => string,
): any => {
  if (isArray(obj)) {
    return obj.map(o => reform(o, keyConverter));
  }

  const newObj = {};
  Object.keys(obj).map(key => {
    const value = obj[key];
    const newKey = keyConverter(key);

    if (isObject(value)) {
      newObj[newKey] = reform(value, keyConverter);
    } else if (key.match(/_at$/) && isString(value)) {
      newObj[newKey] = DateTime.fromISO(value);
    } else {
      newObj[newKey] = value;
    }
  });

  return newObj;
};

export const reformResponse = (response: AxiosResponse): AxiosResponse => {
  const data = reform(response.data, camel);

  return { ...response, data };
};