[pmwiki-users] Compute $EditRedirectFmt?

[Stirling Westrup]

Lucian Wischik wrote:
> I'm trying to use $EditRedirectFmt. The documentation
>   http://www.pmwiki.org/wiki/PmWiki/EditVariables#EditRedirectFmt
> suggests examples like
>   $EditRedirectFmt = '{$Group}.HomePage';
> 
> But I want $EditRedirectFmt to be computed through a regexp on
> the $FullName. For example, if the user was editing a page
> "Main/TopicComments" then I want to redirect to "Main/Topic".
> (i.e. stripping "Comments" off the end).
> 
> It looks like $EditRedirectFmt can't be used in this way. That's
> because it merely gets substituted by the FmtPageName function.
> I guess I could alter pmwiki.php myself to get the desired effect,
> but I want to confine myself to local changes.
> 
> Am I wrong? Is it possible somehow to use $EditRedirectFmt as I wish?

There are a couple of ways to do it. First of all, if all you need to do is
strip off a simple ending, then you can do this:

  $BaseNamePatterns['/Comments$/'] = '';
  $EditRedirectFmt = '{$BaseName}';

$BaseNamePatterns is an array of regular expression replacements that get
performed on $FullName to yield $BaseName. If that's not sufficient, you can
always define your own computed variable:

  $EditRedirectFmt = '{$RedirectName}';
  $FmtPV['$RedirectName'] = 'RedirectFunc($pagename)';

  function RedirectFunc($pagename)
    { return Some_Arbitrary_Calculation($pagename);
    }