Custom API for modded Kohana

routes.php

<?php

Route::set('api', 'api/<version>/<controller>(.<format>)(/<id>)(/<custom>)',
	array(
		'version' => 'v1',
		'id'      => '\d+',
		'format'  => 'json|xml|csv',
	))
	->filter(function($route, $params, $request)
	{
		// Empty the action name and append custom verb or _collection
		$params['action'] = '';
		isset($params['custom']) AND $params['action'] .= '_'.$params['custom'];
		$params['id'] === FALSE	AND $params['action'] .= '_collection';

		// Resolve bundle name
		$bundles = [
		   ...
		];

		foreach ($bundles as $name => $controllers)
		{
			if (in_array($params['controller'], $controllers))
			{
				$params['namespace'] .= "\\$name";
				break;
			}
		}

		return $params;
	})
	->defaults(array(
		'namespace'  => 'Vendor',
		'directory'  => 'API',
		'action'     => 'index',
		'id'         => FALSE,
	));



// Base controller
	protected $action_map = array
	(
		Http_Request::POST   => 'post',
		Http_Request::GET    => 'get',
		Http_Request::PUT    => 'put',
		Http_Request::DELETE => 'delete',
		'PATCH'              => 'patch',
	);