[rt-users] Filter ticket text for display?

[Kevin Falcone]

On Jul 9, 2007, at 10:56 AM, Gary Oberbrunner wrote:

> Kevin Falcone wrote:
>>
>> On Jul 9, 2007, at 10:06 AM, Gary Oberbrunner wrote:
>>
>>> Hi folks -- is there a hook to filter or process the ticket  
>>> history texts
>>> (email bodies) when they're displayed?  We'd like to turn certain
>>> pieces of
>>> text (identified by regex) into html links.
>>
>> You should be able to use the ModifyDisplay callback in
>> Tickets/Elements/ShowTransaction to do this.
>
> Thanks, Kevin -- that looks like exactly what I need.  I'll try  
> it.  Does
> anyone have a sample Callbacks/*/Elements/Ticket/ShowTransaction/ 
> ModifyDisplay
> callback?  I don't really understand the calling convention, i.e.  
> what are the
> args and what I'm supposed to return.  Should I write a function,  
> or is it
> just bare Mason/perl code?  What are %INIT% and %ARGS% (I see those  
> in some
> other callbacks)?  Where do I get the actual ticket text (message  
> body)?
>
> (I looked at the rt wiki page "CustomizingWithCallbacks" and it  
> explains the
> proper file/dir to put the callback in, but doesn't say what it  
> should look like.)

The RTFM and RTIR packages on http://download.bestpractical.com/pub/ 
rt/devel/ make
extensive use of callbacks.  I'm not sure if they use that specific  
callback, but
you should be able to understand the technique from them.

-kevin