@mintlab/kitchen-sink/url.js

const { get } = require('./object');
const expose = require('./expose');
const { keys} = Object;

/**
 * Get the path segments from an absolute path with an optional query.
 *
 * @param {string} path
 * @return {Array}
 */
function getSegments(path) {
  const [pathComponent] = path.split('?');
  const [, ...segments] = pathComponent.split('/');
  
  return segments; 
}

/**
 * Get the second path segment from an absolute path with an optional query.
 *
 * @param {string} path
 * @return {string}
 */
function getSegment(path) {
  const [, segment] = getSegments(path);

  return segment;
}

/**
 * Build a paramString from an the keyValues of an object
 *
 * @param {Object} params
 * @return {string}
 */
function buildParamString(params) {
  const paramsAsString =
      keys(params)
        .filter(param => params[param])
        .map(param => `${param}=${encodeURIComponent(get(params, param))}`)
        .join('&');
  const preParam = paramsAsString.length ? '?' : '';

  return `${preParam}${paramsAsString}`;
}

/**
 * Build a URL from the base url and given params
 *
 * @param {string} url
 * @param {Object} params
 * @return {string}
 */
function buildUrl(url, params) {
  return `${url}${buildParamString(params)}`;
}

/**
 * @param {string} params
 * @return {Object}
 */
const objectifyParams = params => {
  if(!params) {
    return {};
  }

  return params
    .split('&')
    .reduce((acc, param) => {
      const [name, value] = param.split('=');

      acc[name] = value;

      return acc;
    }, {});
};

module.exports = expose({
  getSegments,
  getSegment,
  buildParamString,
  buildUrl,
  objectifyParams,
});