Sort user list within a single pass, use server provided user modes

src/models/chan.js

@@ -23,18 +23,21 @@ function Chan(attr) {
 	}, attr));
 }
 
-Chan.prototype.sortUsers = function() {
-	this.users = _.sortBy(
-		this.users,
-		function(u) { return u.name.toLowerCase(); }
-	);
+Chan.prototype.sortUsers = function(irc) {
+	var userModeSortPriority = {};
+	irc.network.options.PREFIX.forEach(function(prefix, index) {
+		userModeSortPriority[prefix.symbol] = index;
+	});
 
-	["+", "%", "@", "&", "~"].forEach(function(mode) {
-		this.users = _.remove(
-			this.users,
-			function(u) { return u.mode === mode; }
-		).concat(this.users);
-	}, this);
+	userModeSortPriority[""] = 99; // No mode is lowest
+
+	this.users = this.users.sort(function(a, b) {
+		if (a.mode === b.mode) {
+			return a.name.toLowerCase() < b.name.toLowerCase() ? -1 : 1;
+		}
+
+		return userModeSortPriority[a.mode] - userModeSortPriority[b.mode];
+	});
 };
 
 Chan.prototype.getMode = function(name) {

src/plugins/irc-events/join.js

@@ -19,7 +19,7 @@ module.exports = function(irc, network) {
 			});
 		}
 		chan.users.push(new User({nick: data.nick, modes: ""}));
-		chan.sortUsers();
+		chan.sortUsers(irc);
 		client.emit("users", {
 			chan: chan.id
 		});

src/plugins/irc-events/names.js

@@ -19,7 +19,7 @@ module.exports = function(irc, network) {
 
 			chan.users.push(user);
 		});
-		chan.sortUsers();
+		chan.sortUsers(irc);
 		client.emit("users", {
 			chan: chan.id
 		});

src/plugins/irc-events/nick.js

@@ -29,7 +29,7 @@ module.exports = function(irc, network) {
 				return;
 			}
 			user.name = data.newnick;
-			chan.sortUsers();
+			chan.sortUsers(irc);
 			client.emit("users", {
 				chan: chan.id
 			});