Can snippets/plugins make use of/intercept friendly urls?

[!MoxieCart? &type=`show` &display=`tags` &search=`new`!]

<?php
/**
 * Plugin for various moxiecart needs.
 *
 * @package default
 * @author John Sheeley
 **/
class Plugin
{
	
	/**
	 * undocumented function
	 *
	 * @return void
	 * @author John Sheeley
	 **/
	function __construct($moxieCart = null){
		$this->modx = $moxieCart->modx;
		$this->moxieCart = $moxieCart;
	}
	
	function direct(){  
		switch($this->modx->event->name) {  
			case 'OnPageNotFound':  
				$this->redirectFriendlyURL();
        	break;  
			case 'OnWebPagePrerender':  
				/* FUTURE: ? */  
			break;
	   }
	}
	
	private function redirectFriendlyURL(){
		//redirect to store pages based on friendly url
		$requestURI = trim($_SERVER['REQUEST_URI'], '/');
		//get the location of the store page, e.g. store/
		$storeLocation = trim(str_replace($this->modx->config['friendly_url_suffix'], '', $this->modx->makeUrl($this->moxieCart->_settings['storePage'])), '/');
		
		if (substr($requestURI, 0, strlen($storeLocation)) == $storeLocation) {
			//page is in store directory
			$process = true;
			//remove store directory from path
			$location = substr($requestURI,strlen($storeLocation));
			//get the rest of the path into parts
			$requestParts = explode('/', $location);
			if($requestParts[1] == 'tags'){
				//looking for tags
				array_shift($requestParts);
				$getData = array(
					'needle' => $requestParts,
					'haystack' => 'tags'
				);
			} elseif(count($requestParts) == 1) {
				//looking for category
				$getData = array(
					'needle' => urldecode($requestParts[0]),
					'haystack' => 'category'
				);
			} elseif(strpos(end($requestParts), $this->modx->config['friendly_url_suffix'])){
				//looking for a product
				$getData = array(
					'mode' => 'single',
					'product' => str_replace($this->modx->config['friendly_url_suffix'], '', urldecode(array_pop($requestParts))),
					'category' => urldecode(array_pop($requestParts))
				);
			} else {
				$process = false;
			}
			
			if($process){
				//set data
				//TODO
				foreach($getData as $key => $value){
					$_GET[$key] = $value;
				}
				
				//forward page
				$this->modx->sendForward($this->moxieCart->_settings['storePage']);
			}
		}
	}
	
} // END class 
?>

$this->modx = $moxieCart->modx;

$this->modx =& $moxieCart->modx;

<base href="[(site_url)]" />

<base href="[[++site_url]]" />

<base href="[(site_url)]" />