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 (! (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['$t'] = data;
}
function endElement(name) {
// This should check to make sure that the name we're ending
// matches the name we started on.
var ancestor = ancestors.pop();
if (!options.reversible) {
if ((Object.keys(currentObject).length == 1) && ('$t' in currentObject)) {
if (ancestor[name] instanceof Array) {
ancestor[name].push(ancestor[name].pop()['$t']);
} else {
ancestor[name] = currentObject['$t'];
}
}
}
currentObject = ancestor;
}
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)) {
console.log('-->' + xml + '<--');
throw new Error('There are errors in your xml file: ' + parser.getError());
}
if (options.object) {
return obj;
}
return JSON.stringify(obj);
};
