var expat = require('node-expat');
var fs = require('fs');
var parser = new expat.Parser('UTF-8');
// This object will hold the final result.
var obj = {};
var currentParent = obj;
var ancestors = [];
function startElement(name, attrs) {
if (! (name in currentParent)) {
currentParent[name] = attrs;
} else if (!(currentParent[name] instanceof Array)) {
// Put the existing object in an array.
var newArray = [currentParent[name]];
// Add the new object to the array.
newArray.push(attrs);
// Point to the new array.
currentParent[name] = newArray;
} else {
// An array already exists, push the attributes on to it.
currentParent[name].push(attrs);
}
// Store the current (old) parent.
ancestors.push(currentParent);
// We are now working with this object, so it becomes the current parent.
if (currentParent[name] instanceof Array) {
// If it is an array, get the last element of the array.
currentParent = currentParent[name][currentParent[name].length - 1];
} else {
// Otherwise, use the object itself.
currentParent = currentParent[name];
}
}
function charData(data) {
data = data.trim();
if (!data.length) {
return;
}
currentParent['$t'] = data;
}
function endElement(name) {
// This should check to make sure that the name we're ending
// matches the name we started on.
var ancestor = ancestors.pop();
if ((Object.keys(currentParent).length == 1) && ('$t' in currentParent)) {
if (ancestor[name] instanceof Array) {
//console.log("list-replacing $t in " + name);
ancestor[name].push(ancestor[name].pop()['$t']);
} else {
//console.log("replacing $t in " + name);
ancestor[name] = currentParent['$t'];
}
} else {
//console.log("final " + name + ":");
//console.log(currentParent);
}
currentParent = ancestor;
}
parser.on('startElement', startElement);
parser.on('text', charData);
parser.on('endElement', endElement);
module.exports.toJson = function(xml, _object) {
_object = _object || false;
if(parser.parse(xml)) {
if(_object) {
return obj;
}
return JSON.stringify(obj);
}
};
