Simple node script which turns serialized keys in json files into nested json objects

unflat.js

/**
 * 
 * Simple node script which turns serialized keys 
 * in json file into nested json object
 * 
 * input: {
 *   "key.key2": "value"
 * }
 * 
 * output: {
 *   "key" {
 *     "key2": "value"
 *   }
 * }
 * 
 **/

var file = require('./input/en.json'),
    fs = require('fs'),
    unflatten = require('flat').unflatten;

function sortObject(object){
    var sortedObj = {},
        keys = Object.keys(object);

    keys.sort(function(key1, key2){
        key1 = key1.toLowerCase(), key2 = key2.toLowerCase();
        if(key1 < key2) return -1;
        if(key1 > key2) return 1;
        return 0;
    });

    for(var index in keys){
        var key = keys[index];
        if(typeof object[key] == 'object' && !(object[key] instanceof Array)){
            sortedObj[key] = sortObject(object[key]);
        } else {
            sortedObj[key] = object[key];
        }
    }

    return sortedObj;
}

var unflat = unflatten(file);
var unflatFile = JSON.stringify(sortObject(unflat), null, 4);

fs.writeFile("./output/en.json", unflatFile, function(err) {
    if(err) {
        return console.log(err);
    }

    console.log("The file was saved!");
});