Convert Object Keys according to Table/Map object

recursive-convert-keys.js

// Demo: http://jsfiddle.net/MadLittleMods/g3g0g1L4/
// GitHub Gist: https://gist.github.com/MadLittleMods/7b9ec36879fd24938ad2
// Code Review: http://codereview.stackexchange.com/q/69651/40165

// These are used to determine the map/table format
var const_objectKeyPropertyName = '_short';
var const_objectValuePropertyName = '_object';
var const_arrayKeyPropertyName = '_array_item';

function convertKeys(object, map, reverseMap)
{
	if (typeof object != "object" || map == null) {
		return object;
	}

	// Clone the object so we don't modify the original
	var resultantObject = $.extend(true, {}, object);

	// Iterate over the object
	Object.keys(resultantObject).forEach(function(key) {
		var mapKey = reverseMap ? findKeyFromValue(map, key) : key;

		var newKeyName = reverseMap ? mapKey : map[mapKey];
		if(typeof newKeyName == "object") {
			newKeyName = newKeyName[const_objectKeyPropertyName];
		}

		if(!newKeyName) {
			return resultantObject;
		}

		renameProperty(resultantObject, key, newKeyName);


		var value = resultantObject[newKeyName];

		if (value instanceof Array) {
			for (var i = 0, length = value.length; i < length; i++) {
				resultantObject[newKeyName][i] = convertKeys(value[i], map[mapKey][const_arrayKeyPropertyName], reverseMap);
			}
		}
		else if(typeof value == "object") {
			resultantObject[newKeyName] = convertKeys(value, map[mapKey][const_objectValuePropertyName], reverseMap);
		}

	});

	return resultantObject;
}

function renameProperty(object, oldName, newName)
{
	// from: http://stackoverflow.com/a/4648411/796832

	// Check for the old property name to avoid a ReferenceError in strict mode.
	if (object.hasOwnProperty(oldName)) {
		object[newName] = object[oldName];
		delete object[oldName];
	}
	return object;
}

function findKeyFromValue(object, searchValue)
{
	var keys = Object.keys(object);
	var resultantKey = false;
	for(var i = 0; i < keys.length; i++) {
		var key = keys[i];
		var value = object[key];
		if(typeof value == "object") {
			value = value[const_objectKeyPropertyName];
		}

		if(value == searchValue) {
			resultantKey = key;
			break;
		}
	}

	return resultantKey;
}