protected function compress($data, $config)
 {
     switch ($config['type']) {
         case 'jsmin':
             include_once Kohana::find_file('vendor', 'JSMin');
             return JSMin::minify($data);
         case 'jsminplus':
             include_once Kohana::find_file('vendor', 'jsminplus');
             return JSMinPlus::minify($data);
         case 'packer':
             include_once Kohana::find_file('vendor', 'JavaScriptPacker');
             $packer = new JavaScriptPacker($data, empty($config['level']) ? 'Normal' : $config['level']);
             return $packer->pack();
         case 'yuicompressor':
             $options = isset($config['options']) ? $config['options'] : '';
             return yuicompressor::compress($data, 'js', $options);
         default:
             throw new Kohana_User_Exception('Unknown Javascript Compression Type', 'Unknown type: ' . $config['type']);
     }
 }
 protected function compress($data, $config)
 {
     switch ($config['type']) {
         case 'strip':
             // Borrowed from the old Kohana media module:
             // http://code.google.com/p/kohanamodules/source/browse/tags/2.2/media/controllers/media.php
             // Remove comments
             $data = preg_replace('~/\\*[^*]*\\*+([^/][^*]*\\*+)*/~', '', $data);
             // Replace all whitespace by single spaces
             $data = preg_replace('~\\s+~', ' ', $data);
             // Remove needless whitespace
             $data = preg_replace('~ *+([{}+>:;,]) *~', '$1', trim($data));
             // Remove ; that closes last property of each declaration
             $data = str_replace(';}', '}', $data);
             // Remove empty CSS declarations
             $data = preg_replace('~[^{}]++\\{\\}~', '', $data);
             return $data;
         case 'yuicompressor':
             $options = isset($config['options']) ? $config['options'] : '';
             return yuicompressor::compress($data, 'css', $options);
         default:
             throw new Kohana_User_Exception('Unknown CSS Compression Type', 'Unknown type: ' . $config['type']);
     }
 }