atriusmaps-node-sdk/dist/cjs/src/utils/funcs.js

This project provides an API to Atrius Personal Wayfinder maps within a Node environment. See the README.md for more information

'use strict';

require('ramda');
require('zousan');

// Ensures only a single asynchronous function wrapped in this function runs at a time.
let lastFn = null;
const singleFile = fn =>
  function () {
    if (lastFn) lastFn = lastFn.then(() => fn.apply(null, arguments));
    else lastFn = fn.apply(null, arguments);

    return lastFn;
  };

/**
 * returns a copy of an object with any (top-level) properties that do not
 * return truthy from the specified function stripped. So it works just like
 * the Array.filter, but for objects.
 * @param  {function} fn A filter predicate - will be passed (key,object)
 * @param  {object} ob The object to filter (top level properties only)
 * @returns (object) The newly created object with filtered properties
 */
function filterOb(fn, ob) {
  const ret = {};
  Object.keys(ob).forEach(key => {
    if (fn(key, ob[key])) ret[key] = ob[key];
  });
  return ret;
}

exports.filterOb = filterOb;
exports.singleFile = singleFile;