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;