// ==UserScript==
// @name     The Old New Thing URL Rewriter
// @author   Michael Becker <alcexhim@gmail.com>
// @version  1
// @grant    none
// @include  https://devblogs.microsoft.com/oldnewthing/*
// ==/UserScript==

var config = {
	"patterns": [
		{
			"find": "blogs.msdn.microsoft.com",
			"replaceWith": "devblogs.microsoft.com"
		},
		{
			"find": "blogs.msdn.com/b/oldnewthing/archive",
			// "redirectTo": "https://web.archive.org/*/http://%1"
			redirectTo: function (originalUrl) {
				var parts = originalUrl.split('/');
				if (parts.length > 8) {
					var datetime = parts[6] + parts[7] + parts[8];
					return "https://web.archive.org/web/" + datetime + "000000/" + originalUrl;
				}
				return originalUrl;
			}
		}
	]
}

window.addEventListener("load", function()
{
	var links = document.getElementsByTagName("A");
	console.log(links.length + " links found");
	for (var i = 0; i < links.length; i++)
	{
		for (var j = 0; j < config.patterns.length; j++) {
			if (links[i].href.indexOf(config.patterns[j].find) !== -1) {
				if (typeof (config.patterns[j].replaceWith) === 'string') {
					links[i].href = links[i].href.replace(config.patterns[j].find, config.patterns[j].replaceWith);
				}
				else if (typeof (config.patterns[j].redirectTo) === 'string') {
					links[i].href = config.patterns[j].redirectTo.replace('%1', links[i].href);
				}
				else if (typeof (config.patterns[j].redirectTo) === 'function') {
					links[i].href = config.patterns[j].redirectTo(links[i].href);
				}
			}
		}
	}

});