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

var obj = {}; var currentObject = {};

var ancestors = [];

var currentElementName = null;

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

currentElementName = name;

if(options.coerce) { // Looping here in stead of making coerce generic as object walk is unnecessary

Object.keys(attrs).forEach(function(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) {

//console.log('->' + data + '<-'); /*if (!data.trim().length) { return; }*/ if (options.trim) {

data = data.trim();

}

if (options.sanitize) { data = sanitize(data); } currentObject['$t'] = coerce((currentObject['$t'] || '') + data);

} function endElement(name) {

if (currentElementName !== name) {

delete currentObject['$t']; }

// 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(value) {

if (!options.coerce) {

return value;

}

var num = Number(value);

if (!isNaN(num)) { return num; }

var _value = value.toLowerCase(); if (_value == 'true' || _value == 'yes') { return true; } if (_value == 'false' || _value == 'no') { return false;

}

return value;

}

/** * Simple sanitization. It is not intended to sanitize * malicious element values. * * character | escaped * < &lt; * > &gt; * ( &#40; * ) &#41; * # &#35; * & &amp; * " &quot; * ' &apos; */ var chars = { '<': '&lt;', '>': '&gt;', '(': '&#40;', ')': '&#41;', '#': '&#35;', '&': '&amp;', '"': '&quot;', "'": '&apos;' }; function sanitize(value) { if (typeof value !== 'string') { return value; } Object.keys(chars).forEach(function(key) { value = value.replace(key, chars[key]); }); return value; } /** * Parses xml to json using node-expat. * @param {String|Buffer} xml The xml to be parsed to json. * @param {Object} _options An object with options provided by the user. * The available options are: * - object: If true, the parser returns a Javascript object instead of * a JSON string. * - reversible: If true, the parser generates a reversible JSON, mainly * characterized by the presence of the property $t. * - sanitize_values: If true, the parser escapes any element value in the xml * that has any of the following characters: <, >, (, ), #, #, &, ", '. * * @return {String|Object} A String or an Object with the JSON representation * of the XML. */

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 = [];

currentElementName = null;

options = { object: false,

reversible: false,

coerce: true, sanitize: true, trim: true

}; 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; }

var json = JSON.stringify(obj); //See: http://timelessrepo.com/json-isnt-a-javascript-subset json = json.replace(/\u2028/g, '\\u2028').replace(/\u2029/g, '\\u2029'); return json;

};