Joi to English Translator

//take a joi object and return a string that is actually ok to display on a front-end

import _ from 'lodash';

function joiToEnglish(joiErr){
  return _
    .chain(joiErr.details)
    .reduce((collected, detail) => {
      collected[detail.context.key] = collected[detail.context.key]  || [];
      collected[detail.context.key].push(detail.message.replace(`"${detail.context.key}"`, ''));
      return collected;
    }, {})
    .reduce((result, value, key) => {
      let message = _.uniq(value).join(', ');
      result += `${key} ${message}. `;
      return result;
    }, '')
    .value();
}