opmlparser
Version:
OPML parsing using sax js
90 lines (80 loc) • 2.49 kB
JavaScript
/*!
* node-opmlparser
* Copyright(c) 2014 Dan MacTough <danmactough@gmail.com>
* MIT Licensed
*/
var OpmlParser = require('../');
var opmlparser = new OpmlParser()
, index = {};
var xml = [ '<?xml version="1.0" encoding="ISO-8859-1"?>',
'<opml version="1.1">',
'<head>',
'<title>I\'m a tree</title>',
'</head>',
'<body>',
'<outline text="trunk">',
'<outline text="limb">',
'<outline text="leaf"/>',
'<outline text="leaf"/>',
'</outline>',
'<outline text="limb">',
'<outline text="leaf"/>',
'<outline text="leaf"/>',
'<outline text="leaf"/>',
'</outline>',
'</outline>',
'<outline text="stump"/>',
'</body>',
'</opml>'].join('\n');
opmlparser.on('error', done);
opmlparser.once('readable', function () {
console.log('This OPML is entitled: "%s"', this.meta.title);
});
opmlparser.on('readable', function() {
var outline;
while (outline = this.read()) {
index[outline['#id']] = outline;
}
});
opmlparser.on('end', function () {
console.log('Here\'s my hierarchy.');
var stack = Object.keys(index).reduce(function (stack, id) {
var outline = index[id]
, i
, children;
if (stack[0]['#id'] === outline['#parentid']) {
stack[0].children || (stack[0].children = {});
stack[0].children[id] = outline;
}
else if (stack[0].children && outline['#parentid'] in stack[0].children) {
stack.unshift(stack[0].children[outline['#parentid']]);
stack[0].children || (stack[0].children = {});
stack[0].children[id] = outline;
}
else {
// unwind the stack as much as needed
for (i = stack.length - 1; i >= 0; i--) {
children = stack.shift();
stack[0].children[children['#id']] = children;
if (stack[0]['#id'] === outline['#parentid']) {
stack[0].children[id] = outline;
break;
}
}
}
return stack;
}, [ { 'text': 'root', '#id': 0, children: {} } ]);
console.log(inspect(stack[0]));
console.log('All done.');
});
opmlparser.end(xml);
function done (err) {
if (err) {
console.log(err, err.stack);
return process.exit(1);
}
process.exit();
}
function inspect (obj) {
return require('util').inspect(obj, null, 10, true);
}