Transforming object keys

object-transformers.js

import { isPlainObject, isArray, camelCase, snakeCase } from 'lodash';

export function snakeKeys(object) {
  return deepTransformKeys(object, snakeCase);
}

export function camelKeys(object) {
  return deepTransformKeys(object, camelCase);
}

function deepTransformKeys(object, transformer) {
  if (!isPlainObject(object)) {
    return object;
  }

  return Object.entries(object).reduce(mapValue, {});

  function mapValue(obj, [k, v]) {
    obj[transformer(k)] = toValue(v);
    return obj;
  }

  function toValue(v) {
    if (isArray(v)) {
      return v.map(toValue);
    } else if (isPlainObject(v)) {
      return deepTransformKeys(v, transformer);
    }

    return v;
  }
}