Url rewriter

# community URL rewriter
function urlRewriter (string url) : string {
	var string retUrl;

	if (not $url->starts_with("http://community.livejournal.com/")) {
		return $url;
	}

	# first drop the http://community.livejournal.com/
	var int len = $url->length();
	$retUrl = $url->substr(33, $len);

	# now scan the string for the first slash to
	# get the username part
	var string comm;
	var string entry;

	var int[] possLocations;
	$possLocations = [0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15];
	$len = $retUrl->length();
	var int j;
	$j = 0;
	foreach var int i ($possLocations) {
		if ($j == 0) {
			$comm = $comm + $retUrl->substr($i, 1);
			$entry = $retUrl->substr($i + 1, $len);

			# replace _ with - as we go
			if ($comm->ends_with("_")) {
				$comm = $comm->substr(0, $i);
				$comm = $comm + "-";
			}

			if ($entry->starts_with("/")) {
				$j = $i;
			}
		}
	}

	return "http://" + $comm + ".livejournal.com" + $entry;
}