Re: Using Smarty with OOP: best practices?

Hi, perhaps I have another workaround for you but I'm not sure if it will work ;-) 1.) Background: You can pass objects and functions as an argument to smarty functions 2.) Create a smarty function exec which will enable us to call functions and assign their return value to a variable if wanted. function smarty_function_exec($params, &$smarty) { extract($params); if (empty($func)) { $smarty->trigger_error("assign: missing 'func' parameter"); return; } if (!empty($assign)) { $smarty->assign($assign, $func); return (""); } else { return ($func); } } 3.) Assign your object to the template $smarty->assign("Gallery", $Gallery); 4.) To execute a function add this to your template {exec func=$Gallery->generateUrl("value")} Now the url generated by your function should appear in html Have fun, André "Bharat Mediratta" <bharat@menalto.com> schrieb im Newsbeitrag news:019201c261ff$7a70c200$0b05000a@firebrand... > > Howdy. I'm writing the second version of Gallery, a PHP > based photo management program. In the rewrite, I'm using > Smarty heavily, and thus far I'm very pleased with its > functionality and performance. (good job, guys!) I'm > also new to this list; I scanned the archives and didn't > see this topic raised. Apologies if I'm flogging a dead > horse here. > > G2 is completely object oriented. It's also designed so that > it can be wholly embedded inside another application like > PostNuke or Drupal, which means that it will have to coexist > peacefully with the unpredictable namespace of another > application. I want to provide plenty of features at > the template level, but I want to avoid polluting the global > namespace (function namespace, that is). I also want to be > able to provide much of the common behaviour for my > functions in a class so that when Gallery is ported to a new > environment we can simply extend the base class and override > the specific behaviours that are different. > > My problem is that Smarty doesn't allow me to register class > methods as callback functions using $smarty->register_function. > What I'd really like is to be able to register a namespace > delegate. For example, if I could do something like this: > > $delegate = new GalleryDelegate(); > $smarty->register_delegate('gallery', $delegate); > > Then inside the template I'd want to say: > > {gallery.generateUrl arg="value"} > > And have that get compiled down to the equivalent of: > > $delegate->generateUrl(array('arg' => "value")); > > In the meantime, to get around this issue, I register all > my callbacks to go to a single function, then tweaked the > compiler so that in the callback parameters it passes in > the name of the actual function that was being called as > part of the $params. This way I can have a single function > that receives all my callbacks, figures out which one was > actually executed and then delegates it to the correct class > method. More specifically, in Smarty_Compiler::_compile_custom_tag > and _compile_block_tag I added this line: > > $arg_list[] = "'__function' => '$tag_command'"; > > then in my callback function I do something like this: > > switch($params['__function']) { > case 'galleryUrl': > $adapter->generateUrl($params); > } > > This basically lets me do my delegation, but it's a little > gnarly. I'd rather do it using the delegation scheme that > I outlined above. > > Is there a better way to do this? If not, would you accept > a patch to implement my delegation scheme? > > Thanks, > -Bharat > > >