[cgiapp] Abstracting run mode methods

[<suppressed>]

Hi!

I'm trying to build an application with several required run modes, 
but allow site-specific configuration of additional run modes, 
each with their own template files.  This works just fine, if none 
of these run modes require anything 'unusual'.  By that I am 
referring specifically to template variables not known by the 
application.  Additional variables might come from site-supplied 
code, or configuration information pulled from a backend datastore 
or configuration file.  Some rough pseudocode:

During cgiapp_init():

Load template files, and add a param with the template name 
and object as the key/value pair, including site-supplied ones.

During setup():

$self->run_modes( 'reqRM1' => 'reqMeth1', 'reqRM2' => 'reqMeth2');

foreach site-supplied template {
  $self->run_modes( rmName, (supplied rmMeth || generic) );
}

$self->run_modes( ...other required run mode(s) );

The generic() method is straightforward:

. Retrieve the current run mode
. Retrieve the param value for that runmode template, i.e. the 
  template object
. Set a common set of template params and output

The problem comes in when I want to invoke a site-specific 
method in a site-specific module (this seems like the easiest 
way to have the application extended, rather than mucking with 
the application code).  If the the module name is in $tMod, I can 
load the module with:

$tMod =~ s/::/\//g;
$tMod .= '.pm';
require $tMod;
$tMod->import();

Assuming the module exports its method, this would work, 
but alas, it needs access to the cgiapp params.  How can 
I get around this??  I thought about making it a derived class 
(and dropping all the exporter stuff!) and calling new(), but I'm 
really unsure about that.  Is this a nut someone has already 
cracked??   Many, many thanks in advance for *any* clues!!!

-r

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