Support/Comments for FileDownloadPE

$alias = $_REQUEST['q'];
if (!$alias) $alias = Download::GetAlias($_REQUEST['id']);

<?php
/**
 * @package FileDownloadPE (Pirate Edition)
 * @copyright 2008 MODx CMS/F Community.
 * @license GPL v3 <http://www.gnu.org/licenses/gpl.html>
 * @link http://scottydelicious.com/blog/2008/06/15/filedownloadpe
 * @version 1.1 <2008.18.06 : June 18th 2006>
 * @since 1.0 <2008.15.06 : June 15th 2006>
 * @category PHP 5 Only. Requires PHP5 <http://gophp5.org/>
 * @author Dr. Scotty Delicious, DFPA <[email protected]>
 */

//  Set default snippet parameters.
$_table     = 'downloads';
$filename   = isset($filename)  ? $filename : null;
$dberror    = isset($dberror)   ? $dberror  : 'There was an error processing your download request.';
$nofile     = isset($nofile)    ? $nofile   : 'No file specified.';

// Defaults for Template Variables:
$alias = $_REQUEST['q'];
if (!$alias) $alias = Download::GetAlias($_REQUEST['id']);
$fileMimeTV = isset($fileMimeTV) ? $fileMimeTV : 'FileMime';
$filePathTV = isset($filePathTV) ? $filePathTV : 'File';

// Get download count for requested document.
if ($action == 'count')
{
	$filename = isset($filename) ? $filename : Download::GetAlias($id);
    return Download::Count($filename, $_table, $dberror, $nofile);
}

// Download the requested file.
$mime       = $modx->getTemplateVarOutput($fileMimeTV);
$mime       = $mime[$fileMimeTV];
$file       = $modx->getTemplateVarOutput($filePathTV);
$file       = $modx->config['base_path'] . $file[$filePathTV];

return Download::File($alias, $file, $mime, $_table, $dberror, $nofile);

class Download
{
    private static $error = '';
    private static $nofile = '';
    private static $table = '';
    private static $filename = '';
    
    public static function File($filename, $path, $mime, $table, $dberror, $nofile)
    {
        global $modx;
        self::$table = $modx->getFullTableName($table);
        self::$filename = $filename;
        self::$error = $dberror;
        self::$nofile = $nofile;
        
        $check = self::_tableCheck($table);
        if (!$check) return self::$error;
        
        $info = self::_getInfo();
        if (!$info) return self::$error;
        
        if(is_file($path))  
        {  
            $count = ($info['count'] + 1);
            $update = $modx->db->update("`count`=$count", self::$table, "`name`='$filename'");

            // required for IE  
            if(ini_get('zlib.output_compression')) { ini_set('zlib.output_compression', 'Off'); }

            header('Pragma: public');
            header('Expires: 0');
            header('Cache-Control: must-revalidate, post-check=0, pre-check=0');  
            header('Cache-Control: private',false);  
            header('Content-Type: '.$mime);  
            header('Content-Disposition: attachment; filename="'.basename($path).'"');  
            header('Content-Transfer-Encoding: binary');  
            header('Content-Length: '.filesize($path));
            readfile($path);
            exit;
        }
        else
        {
            return self::$error;
        }
    }
    
    public static function Count($filename, $table, $dberror, $nofile)
    {
        if (!$filename) return $nofile;
        global $modx;
        self::$table = $modx->getFullTableName($table);
        self::$filename = $filename;
        self::$error = $dberror;
        self::$nofile = $nofile;
        
        $check = self::_tableCheck($table);
        if (!$check) return self::$error;
        
        $info = self::_getInfo();
        if (!$info) return self::$error;
        else return $info['count'];
    }

	public static function GetAlias($id = 0)
	{
		global $modx;
		if (!$id) return false;
		$site_content = $modx->getFullTableName('site_content');
		$document = $modx->db->select('alias', $site_content, "`id` = $id");
		$alias = $modx->db->getRow($document);
		return $alias['alias'];
	}
    
    private static function _getInfo()
    {
        global $modx;
        $search = $modx->db->select('*', self::$table, "`name` = '" .self::$filename. "'");

        if ( $modx->db->getRecordCount($search) == 0 )
        {
            $insert = array('name' => self::$filename, 'count' => 0);
            if (!$modx->db->insert($insert, self::$table)) return false;
            $search = $modx->db->select('*', self::$table, "`name` = '" .self::$filename. "'");
        }
        $info = $modx->db->getRow($search);
        return $info;
    }
    
    private static function _tableCheck($tablename)
    {
        global $modx;
        $prefix = $modx->db->config['table_prefix'];
        $check = "SHOW TABLES LIKE '" . $prefix . $tablename . "'";
        $result = $modx->db->query($check);
        $recordCount = $modx->db->getRecordCount($result);
        if ($modx->db->getRecordCount($result) == 0)
        {
            $sql = "CREATE TABLE `" . $prefix . "downloads` (
              `id` int(11) NOT NULL auto_increment,
              `name` varchar(128) NOT NULL default '',
              `count` int(11) NOT NULL default '0',
              PRIMARY KEY  (`id`),
              KEY `name` (`name`)
            )";
            if ( !$modx->db->query($sql) ) return false;
            else $recordCount = 1;
        }
        return $recordCount;
    }
}
?>