[pmwiki-devel] Link Kludge.

[Patrick R. Michaud]

On Wed, Oct 31, 2007 at 02:35:23PM -0400, Stirling Westrup wrote:
> Patrick R. Michaud wrote:
> > On Wed, Oct 31, 2007 at 01:42:55PM -0400, Stirling Westrup wrote:
> >> I have a problem, and there doesn't seem to be a simple way of solving it. The
> >> markup [[Group/]] creates a link to the home page of Group. This is done via
> >> the definition of $DefaultName. What I need, is a way to associate different
> >> home pages with different groups. Its trivial to write up a function that
> >> looks up the home page for a particular group, but the context in which
> >> $DefaultName is expanded doesn't seem to include the information of which
> >> group the home page is for.
> >> [...]
> > 
> > Better would be to come up with a $HomePage page variable that
> > returns the home page for any page in a given group.
> > 
> > If you can describe the process by which we identify a group's
> > home page, I can describe how to turn it into a page variable.
> > Something like this might even make it into the core, since something
> > like $HomePage would seem to be a _lot_ more flexible than the current
> > $DefaultName mechanism.
> 
> Well, currently, I just look up a PTV in the groups GroupHeader page and use
> it if it exists, or I just return the group name as the home name. My function is:
> 
> function HomePage($group)
>   { global $DefaultGroup;
> 
>     if( !$group ) $group = $DefaultGroup;
>     $gh=MakePageName($group,"GroupHeader");
>     $home = PageTextVar($gh,'HomePage');
>     if( !$home ) $home = $group;
>     return $home;
>    }
> 
> 
> The trouble is, I'd rather not have to hunt for all occurrences of [[Group/]]
> in my wiki and replace them with [[Group/{Group.$HomePage}]] or something...

Yes, but you could easily set $PagePathFmt to be

    $PagePathFmt = array('{$Group}.$1', '$1.{$HomePage}');

and then MakePageName will use the $HomePage page variable instead
of $DefaultPage when computing the result of "Group/" or "Group."
So would other places that want to treat a page reference as a
link to a group's home page.

Also, I think the above function is better written as:

    function HomePage($pagename) {
      $group = PageVar($pagename, '$Group');
      $home = PageTextVar("$group.GroupHeader", 'HomePage');
      if (!$home) $home = $group;
      return $home;
    }

Then it can be turned into a page variable with

    $FmtPV['$HomePage'] = 'HomePage($pn)';

This, combined with setting $PagePathFmt as given above, should
give you what you want.

Pm