git.r.bdr.sh - rbdr/tomato-sauce/blob - lib/util.js

   1 'use strict';
   2
   3 const Fs = require('fs');
   4 const Path = require('path');
   5
   6 /**
   7  * Module containing utility functions
   8  *
   9  * @name Util
  10  * @type Object
  11  */
  12 const Util = {
  13
  14     /**
  15    * Parses a 16 bit number buffer
  16    *
  17    * @function parse16BitBuffer
  18    * @memberof Util
  19    * @param {Array<String>} buffer the buffer to parse
  20    * @return {Number} the parsed value
  21    */
  22     parse16BitBuffer(buffer) {
  23
  24         return buffer[0] * 256 + buffer[1];
  25     },
  26
  27     /**
  28    * Picks a random element from an array
  29    *
  30    * @function pickRandom
  31    * @memberof Util
  32    * @param {Array} array the array to use
  33    * @return {Any} the picked element
  34    */
  35     pickRandom(array) {
  36
  37         return array[Math.floor(Math.random() * array.length)];
  38     },
  39
  40     /**
  41    * For a gi ven path, requires all of the files and returns an array
  42    * with the results. If the directory contains any non-requireable
  43    * files, it will fail.
  44    *
  45    * @function loadFiles
  46    * @memberof Util
  47    * @param {String} path the path where the files are located
  48    * @return {Array} the array of all the loaded modules
  49    */
  50     loadFiles(path) {
  51
  52         return new Promise((resolve, reject) => {
  53
  54             Fs.readdir(path, (err, files) => {
  55
  56                 if (err) {
  57                     return reject(err);
  58                 }
  59
  60                 const loadedFiles = [];
  61
  62                 for (const file of files) {
  63                     const filePath = Path.join(path, file);
  64                     let loadedFile;
  65
  66                     try {
  67                         loadedFile = require(filePath);
  68                     }
  69                     catch (err) {
  70                         return reject(err);
  71                     }
  72
  73                     loadedFiles.push(loadedFile);
  74                 }
  75
  76                 resolve(loadedFiles);
  77             });
  78         });
  79     }
  80 };
  81
  82 module.exports = Util;