tra-analysis/website/functions/node_modules/@mrmlnc/readdir-enhanced/lib/async/index.js
2019-01-06 13:14:45 -06:00

49 lines
1.1 KiB
JavaScript

'use strict';
module.exports = readdirAsync;
const maybe = require('call-me-maybe');
const DirectoryReader = require('../directory-reader');
let asyncFacade = {
fs: require('fs'),
forEach: require('./for-each'),
async: true
};
/**
* Returns the buffered output from an asynchronous {@link DirectoryReader},
* via an error-first callback or a {@link Promise}.
*
* @param {string} dir
* @param {object} [options]
* @param {function} [callback]
* @param {object} internalOptions
*/
function readdirAsync (dir, options, callback, internalOptions) {
if (typeof options === 'function') {
callback = options;
options = undefined;
}
return maybe(callback, new Promise(((resolve, reject) => {
let results = [];
internalOptions.facade = asyncFacade;
let reader = new DirectoryReader(dir, options, internalOptions);
let stream = reader.stream;
stream.on('error', err => {
reject(err);
stream.pause();
});
stream.on('data', result => {
results.push(result);
});
stream.on('end', () => {
resolve(results);
});
})));
}