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 // Module containing utility functions.
   7 const Util = {
   8
   9   // Parses a 16 bit number buffer.
  10   parse16BitBuffer: function (buffer) {
  11     return buffer[0] * 256 + buffer[1];
  12   },
  13
  14   // Picks a random element from an array.
  15   pickRandom: function (array) {
  16     return array[Math.floor(Math.random() * array.length)];
  17   },
  18
  19   // For a given path, requires all of the files and returns an array
  20   // with the results. If the directory contains any non-requireable file,
  21   // it will fail.
  22   loadFiles: function (path) {
  23     return new Promise(function (resolve, reject) {
  24       Fs.readdir(path, function (err, files) {
  25         if (err) {
  26           return reject(err);
  27         }
  28
  29         let loadedFiles = [];
  30
  31         for (let file of files) {
  32           let filePath = Path.join(path, file);
  33           let loadedFile;
  34
  35           try {
  36             loadedFile = require(filePath);
  37           } catch (err) {
  38             return reject(err);
  39           }
  40
  41           loadedFiles.push(loadedFile);
  42         }
  43
  44         resolve(loadedFiles);
  45       });
  46     });
  47   }
  48 };
  49
  50 module.exports = Util;