/**
 * dFrame Mail Protector Javascript
 * 
 * @author Steffen Müller
 * @version 0.1
 */

(function()
{
	if (!window.jQuery) return;

	// Base 64 Functions //////////////////////////////////////////////////////////////////////////////
	var bstring = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=";

	var b64decode = function (input)
	{
		if (!input) return "";
		var output = "";
		var chr1, chr2, chr3;
		var enc1, enc2, enc3, enc4;
		var i = 0;

		// remove all characters that are not A-Z, a-z, 0-9, +, /, or =
		input = input.replace(/[^A-Za-z0-9\+\/\=]/g, "");

		do
		{
			enc1 = bstring.indexOf(input.charAt(i++));
			enc2 = bstring.indexOf(input.charAt(i++));
			enc3 = bstring.indexOf(input.charAt(i++));
			enc4 = bstring.indexOf(input.charAt(i++));

			chr1 = (enc1 << 2) | (enc2 >> 4);
			chr2 = ((enc2 & 15) << 4) | (enc3 >> 2);
			chr3 = ((enc3 & 3) << 6) | enc4;

			output = output + String.fromCharCode(chr1);

			if (enc3 != 64) output = output + String.fromCharCode(chr2);
			if (enc4 != 64) output = output + String.fromCharCode(chr3);
		} while (i < input.length);

		return output;
	}
	
	$(function()
	{
		$("A[href^='/go/mailprotector']").each(function()
		{
			var res = $(this).attr("href").match(/^\/go\/mailprotector\/(.*)/);
			if (!res) return;
			
			$(this).attr("href", b64decode(res[1]));
		});
	});
	
})();