Help with xen:if coding in template

[bashy]

Hi,

I'm working on the userpanel template files and wanted to do something nice with the alerts you get.
So I've got the code nearly done but I need to add different CSS classes depending on if the user has an unread alert or not.

Here is a part of the code I used from the default template on XenForo;

<a href="{xen:link account/alerts}" class="{xen:if {$visitor.alerts_unread}, '', 'noalert'}">
  {xen:number $visitor.alerts_unread}
</a>

So that would spit out the class "noalert" if unread is empty.
I want to add another class for if the user has an alert but I don't know the xen code enough to do it. I can do it fine in PHP

if($visitoralerts_unread != '0') {
echo 'alert';
}

 

[Jake Bunce]

You already have the conditional structure there. It's an "if else" logic. If true then value, else next value.

<a href="{xen:link account/alerts}" class="{xen:if {$visitor.alerts_unread}, 'alert', 'noalert'}">
  {xen:number $visitor.alerts_unread}
</a>

 

[bashy]

You already have the conditional structure there. It's an "if else" logic. If true then value, else next value.

<a href="{xen:link account/alerts}" class="{xen:if {$visitor.alerts_unread}, 'alert', 'noalert'}">
  {xen:number $visitor.alerts_unread}
</a>

Oh! I think I got confused at what , ' ', ' ' was doing
Many thanks!

What I got now

Is there a guide to all of these xen codes? Also a list of variables available?