helper.js

const fs = require('fs');
const yaml = require('js-yaml');
const mkdirp = require('mkdirp');

function random() {
  return Math.random();
}

function now() {
  return Date.now();
}

function isString(value) {
  return typeof value === 'string' || value instanceof String;
}

function isObject(value) {
  return typeof value === 'object' || value instanceof Object;
}

function environment() {
  const environmentString = fs.readFileSync("./private/environment.yaml", "utf8")
  return yaml.safeLoad(environmentString);
}

function logError(error) {
  console.log(error.stack);
  const dir = "./private/errors/" + environment['version'] + "/";
  mkdirp(dir);
  fs.writeFileSync(dir + now() + ".txt", error.stack, "utf8");
}

function setIntervalSafely(f, seconds) {
  setInterval(() => {
    try {
      f()
    } catch(e) {
      logError(e)
    }
  }, seconds * 1000);
}

module.exports = {
  random: random,
  now: now,
  isString: isString,
  isObject: isObject,
  environment : environment,
  log: console.log,
  logError:logError,
  setIntervalSafely : setIntervalSafely
}