jslib/lib/file.js

'use strict';

const fs = require('fs');

module.exports = {
    readFile: filename => {
        return new Promise((resolve, reject) => {
            fs.readFile(filename, (err, data) => {
                if (err) {
                    reject(err);
                } else {
                    resolve(data);
                }
            });
        });
    },

    writeFile: (filename, data) => {
        return new Promise((resolve, reject) => {
            fs.writeFile(filename, data, err => {
                if (err) {
                    reject(err);
                } else {
                    resolve();
                }
            });
        });
    }
};