Improve link filter

changelog

@@ -1,3 +1,9 @@
+Fri Sep 27 10:27 2013 CDT
+    * lib/channel.js: Change the link regex, change the way 'affects links'
+      works.  The default link filter will only transform a link of no
+      previous filters transform it (and filters will only transform a link
+      if 'affects links' is ticked).
+
 Thu Sep 26 23:40 2013 CDT
     * lib/config.js: Add config keys for statistics interval & max age,
       alias purge interval & max age.

lib/channel.js

@@ -21,6 +21,7 @@ var Filter = require("./filter.js").Filter;
 var Playlist = require("./playlist");
 var sanitize = require("validator").sanitize;
 var $util = require("./utilities");
+var url = require("url");
 
 var Channel = function(name, Server) {
     var self = this;
@@ -2101,17 +2102,25 @@ Channel.prototype.chainMessage = function(user, msg, data) {
 }
 
 Channel.prototype.filterMessage = function(msg) {
-    const link = /((?:(?:https?)|(?:ftp))(?::\/\/[0-9a-zA-Z\.]+(?::[0-9]+)?[^\s'"$]+))/g;
+    const link = /(\w+:\/\/(?:[^:\/\[\]\s]+|\[[0-9a-f:]+\])(?::\d+)?(?:\/[^\/\s]*)*)/ig;
     var subs = msg.split(link);
     // Apply other filters
     for(var j = 0; j < subs.length; j++) {
         if(this.opts.enable_link_regex && subs[j].match(link)) {
-            subs[j] = subs[j].replace(link, "<a href=\"$1\" target=\"_blank\">$1</a>");
+            var orig = subs[j];
             for(var i = 0; i < this.filters.length; i++) {
                 if(!this.filters[i].filterlinks || !this.filters[i].active)
                     continue;
                 subs[j] = this.filters[i].filter(subs[j]);
             }
+
+            // only apply link filter if another filter hasn't changed
+            // the link
+            if (subs[j] === orig) {
+                subs[j] = url.format(url.parse(subs[j]));
+                subs[j] = subs[j].replace(link,
+                    "<a href=\"$1\" target=\"_blank\">$1</a>");
+            }
             continue;
         }
         for(var i = 0; i < this.filters.length; i++) {