<?php
 
class NP_Cache extends NucleusPlugin {
 
var $cache_dir = '';
 
function getMinNucleusVersion() {
	return 155;
}
 
// name of plugin
function getName() {
	return 'Nucleus Cache';
}
 
// author of plugin
function getAuthor() {
	return 'Jim Burnett';
}
 
// an URL to the plugin website
// can also be of the form mailto:foo@bar.com
function getURL() {
	return 'http://www.mediauncut.com/';
}
 
// version of the plugin
function getVersion() {
	return '1.1.01';
}
 
// a description to be shown on the installed plugins listing
function getDescription() {
	return 'Enables caching of nucleus items, homepage, searches and anything off index.php.';
}
 
function getEventList() {
	return array('PreSkinParse', 'PostSkinParse','PreAddItem','PreUpdateItem');
}
 
function install() {
	$this->createOption('cache_dir','Enter the directory (no trailing slash) of the cache directory: ','text','/tmp');
}
 
function init() {
	$this->cache_dir = trim($this->getOption('cache_dir'));
	$this->obStarted = 0;
}
 
 
function event_PreSkinParse(&$data) {
	ob_start();
	$bStart = 1;
 
	// don't start output buffering if we're not at the top level
	// (fixes problems with RSS feeds & ETAG)
	if (function_exists('ob_get_level') && (ob_get_level() > 0))
		$bStart = 0;
	if ($bStart)
		$this->obStarted = ob_start("ob_gzhandler");
}
 
function event_PreAddItem(&$data){
	$this->deleteCacheFile($data);
}
 
function event_PreUpdateItem(&$data){
	$this->deleteCacheFile($data);
}
 
function deleteCacheFile($data){
	$url = createItemLink( $data['itemid']);
 
	$a = $url;
	$a = str_replace("/","-",$a);
	$a = str_replace("&","-",$a);
	$a = str_replace("?","-",$a);
	$a = str_replace("=","-",$a);
	$cache_file = $this->cache_dir."/cache" . $a;
	if ( file_exists( $cache_file )) unlink( $cache_file );
 
	$cache_file = $this->cache_dir."/cache-";
	if ( file_exists( $cache_file )) unlink( $cache_file );
 }
 
function event_PostSkinParse(&$data) {
	$a = getenv('REQUEST_URI');
	$a = str_replace("/","-",$a);
	$a = str_replace("&","-",$a);
	$a = str_replace("?","-",$a);
	$a = str_replace("=","-",$a);
	$cache_file = $this->cache_dir."/cache" . $a;
 
	//If the cache file doesnt exists then check the date/time of it.
	if ( !file_exists( $cache_file )) {
 
		//can we open the cache file for writing?
		if (!$handle = fopen($cache_file, 'w')) {
			echo "Cannot open file ($cache_file)";
			exit;
		}
 
		//ok write to the cache file..
		if (fwrite($handle, ob_get_contents() ) === FALSE) {
			echo "Cannot write to file ($cache_file)";
			exit;
		}
	}
 
 
	ob_end_flush();
 
}
 
 
}
?>