var expat = require('node-expat'); var fs = require('fs'); // This object will hold the final result.

var obj, currentObject = {};

var ancestors = []; var options = {}; //configuration options function startElement(name, attrs) {

if(options.coerce) { // Looping here in stead of making coerce generic as object walk is unnecessary for (var key in attrs) { if (attrs.hasOwnProperty(key)) { attrs[key] = coerce(attrs[key]); } } }

if (! (name in currentObject)) { currentObject[name] = attrs; } else if (! (currentObject[name] instanceof Array)) { // Put the existing object in an array. var newArray = [currentObject[name]]; // Add the new object to the array. newArray.push(attrs); // Point to the new array. currentObject[name] = newArray; } else { // An array already exists, push the attributes on to it. currentObject[name].push(attrs); } // Store the current (old) parent. ancestors.push(currentObject); // We are now working with this object, so it becomes the current parent. if (currentObject[name] instanceof Array) { // If it is an array, get the last element of the array. currentObject = currentObject[name][currentObject[name].length - 1]; } else { // Otherwise, use the object itself. currentObject = currentObject[name]; } } function text(data) { data = data.trim(); if (!data.length) { return; }

currentObject['$t'] = coerce((currentObject['$t'] || "") + data);

} function endElement(name) { // This should check to make sure that the name we're ending // matches the name we started on. var ancestor = ancestors.pop(); if (!options.reversible) { if ((Object.keys(currentObject).length == 1) && ('$t' in currentObject)) { if (ancestor[name] instanceof Array) { ancestor[name].push(ancestor[name].pop()['$t']); } else {

ancestor[name] = currentObject['$t'];

} } } currentObject = ancestor; }

function coerce(val) { if (!options.coerce) { return val; } var num = Number(val); if (!isNaN(num)) { return num; } switch (val.toLowerCase()){ case 'true': case 'yes': return true; case 'false': case 'no':

return false;

default: return val; } }

module.exports = function(xml, _options) { var parser = new expat.Parser('UTF-8'); parser.on('startElement', startElement); parser.on('text', text); parser.on('endElement', endElement); obj = currentObject = {}; ancestors = []; options = { object: false, reversible: false }; for (var opt in _options) { options[opt] = _options[opt]; } if (!parser.parse(xml)) { throw new Error('There are errors in your xml file: ' + parser.getError()); } if (options.object) { return obj; } return JSON.stringify(obj); };