Index: branches/5.2.x/core/install/install_toolkit.php
===================================================================
diff -u -N -r14771 -r14842
--- branches/5.2.x/core/install/install_toolkit.php	(.../install_toolkit.php)	(revision 14771)
+++ branches/5.2.x/core/install/install_toolkit.php	(.../install_toolkit.php)	(revision 14842)
@@ -1,6 +1,6 @@
 <?php
 /**
-* @version	$Id: install_toolkit.php 14771 2011-11-21 18:06:39Z alex $
+* @version	$Id: install_toolkit.php 14842 2011-12-08 09:00:44Z alex $
 * @package	In-Portal
 * @copyright	Copyright (C) 1997 - 2009 Intechnic. All rights reserved.
 * @license      GNU/GPL
@@ -580,19 +580,20 @@
 		 *
 		 * @param string $section
 		 * @param string $key
+		 * @param mixed $default
 		 * @return string|bool
 		 */
-		function getSystemConfig($section, $key)
+		function getSystemConfig($section, $key, $default = false)
 		{
 			if ( !array_key_exists($section, $this->systemConfig) ) {
-				return false;
+				return $default;
 			}
 
 			if ( !array_key_exists($key, $this->systemConfig[$section]) ) {
-				return false;
+				return $default;
 			}
 
-			return $this->systemConfig[$section][$key] ? $this->systemConfig[$section][$key] : false;
+			return $this->systemConfig[$section][$key] ? $this->systemConfig[$section][$key] : $default;
 		}
 
 		/**
@@ -1070,4 +1071,71 @@
 			// return output in case of errors
 			return $output;
 		}
+
+		/**
+		 * Returns cache handlers, that are working
+		 *
+		 * @param string $current
+		 * @return Array
+		 */
+		public function getWorkingCacheHandlers($current = null)
+		{
+			if ( !isset($current) ) {
+				$current = $this->getSystemConfig('Misc', 'CacheHandler');
+			}
+
+			$cache_handlers = Array (
+				'Fake' => 'None', 'Memcache' => 'Memcached', 'XCache' => 'XCache', 'Apc' => 'Alternative PHP Cache'
+			);
+
+			foreach ($cache_handlers AS $class_prefix => $title) {
+				$handler_class = $class_prefix . 'CacheHandler';
+
+				if ( !class_exists($handler_class) ) {
+					unset($cache_handlers[$class_prefix]);
+				}
+				else {
+					$handler = new $handler_class('localhost:11211');
+					/* @var $handler FakeCacheHandler */
+
+					if ( !$handler->isWorking() ) {
+						if ( $current == $class_prefix ) {
+							$cache_handlers[$class_prefix] .= ' (offline)';
+						}
+						else {
+							unset($cache_handlers[$class_prefix]);
+						}
+					}
+				}
+			}
+
+			return $cache_handlers;
+		}
+
+		/**
+		 * Returns compression engines, that are working
+		 *
+		 * @param string $current
+		 * @return Array
+		 */
+		public function getWorkingCompressionEngines($current = null)
+		{
+			if ( !isset($current) ) {
+				$current = $this->getSystemConfig('Misc', 'CompressionEngine');
+			}
+
+			$output = shell_exec('java -version');
+			$compression_engines = Array ('' => 'None', 'yui' => 'YUICompressor (Java)', 'php' => 'PHP-based');
+
+			if ( strpos($output, 'Java Version') === false ) {
+				if ( $current == 'yui' ) {
+					$compression_engines['yui'] .= ' (offline)';
+				}
+				else {
+					unset($compression_engines['yui']);
+				}
+			}
+
+			return $compression_engines;
+		}
 	}
\ No newline at end of file