<?php

/**
 * Implementation of the Application Packaging Standard from SwSoft/Parallels
 * http://apsstandard.com
 *
 * This file is part of the Froxlor project.
 * Copyright (c) 2003-2009 the SysCP Team (see authors).
 * Copyright (c) 2010 the Froxlor Team (see authors).
 *
 * For the full copyright and license information, please view the COPYING
 * file that was distributed with this source code. You can also view the
 * COPYING file online at http://files.froxlor.org/misc/COPYING.txt
 *
 * @copyright  (c) the authors
 * @author     Florian Lippert <flo@syscp.org> (2003-2009)
 * @author     Froxlor team <team@froxlor.org> (2010-)
 * @license    GPLv2 http://files.froxlor.org/misc/COPYING.txt
 * @package    APS
 * @version    $Id$
 * @todo		implement charset validation
 *				reconfigure
 *				patch- and versionmanagement
 *				use settings/userinfo array instead a copy of this vars
 *				remove locked packages
 *				replace all html code
 *				add https support
 *				multi language support (package localization)
 *				zip stuff in own class
 *				logging
 *				button for remove of all failed installations
 *				increse database counter for customer
 */

class ApsParser
{
	private $userinfo = array();
	private $settings = array();
	private $db = false;
	private $RootDir = '';
	private $aps_version = '1.0';

	/**
	 * Constructor of class, setup basic variables needed by the class
	 *
	 * @param	userinfo		global array with the current userinfos
	 * @param	settings		global array with the current system settings
	 * @param	db				valid instance of the database class
	 */

	public function __construct($userinfo, $settings, $db)
	{
		$this->settings = $settings;
		$this->userinfo = $userinfo;
		$this->db = $db;
		$this->RootDir = dirname(dirname(dirname(dirname(__FILE__)))) . '/';
	}

	/**
	 * function provides instance management for admins
	 */

	private function ManageInstances()
	{
		global $lng, $filename, $s, $page, $action;
		$Question = false;

		//dont do anything if there is no instance

		if((int)$this->userinfo['customers_see_all'] == 1)
		{
			$Instances = $this->db->query('SELECT * FROM `' . TABLE_APS_INSTANCES . '` AS `i` INNER JOIN `' . TABLE_APS_PACKAGES . '` AS `p` ON `i`.`PackageID` = `p`.`ID`');
		}
		else
		{
			$Instances = $this->db->query('SELECT * FROM `' . TABLE_APS_INSTANCES . '` AS `i` INNER JOIN `' . TABLE_APS_PACKAGES . '` AS `p` ON `i`.`PackageID` = `p`.`ID` INNER JOIN `' . TABLE_PANEL_CUSTOMERS . '` AS `c` ON `i`.`CustomerID` = `c`.`customerid` WHERE `c`.`adminid` = ' . (int)$this->userinfo['adminid']);
		}

		if($this->db->num_rows($Instances) == 0)
		{
			self::InfoBox($lng['aps']['noinstancesexisting']);
			return;
		}

		if(isset($_POST['save']))
		{
			$Ids = '';
			$Result = $this->db->query('SELECT * FROM `' . TABLE_APS_INSTANCES . '`');

			while($Row = $this->db->fetch_array($Result))
			{
				//has admin clicked "yes" for question

				if(isset($_POST['answer'])
				   && $_POST['answer'] == $lng['panel']['yes'])
				{
					//instance installation stop

					if(isset($_POST['stop' . $Row['ID']])
					   && $_POST['stop' . $Row['ID']] == '1')
					{
						//remove task

						$this->db->query('DELETE FROM `' . TABLE_APS_TASKS . '` WHERE `InstanceID` = ' . (int)$Row['ID']);

						//remove settings

						$this->db->query('DELETE FROM `' . TABLE_APS_SETTINGS . '` WHERE `InstanceID` = ' . (int)$Row['ID']);

						//remove instance

						$this->db->query('DELETE FROM `' . TABLE_APS_INSTANCES . '` WHERE `ID` = ' . (int)$Row['ID']);

						//decrease used flag

						$this->db->query('UPDATE `' . TABLE_PANEL_CUSTOMERS . '` SET `aps_packages_used` = `aps_packages_used` - 1 WHERE `customerid` = ' . (int)$Row['	CustomerID']);
					}

					//instance uninstallation

					if(isset($_POST['remove' . $Row['ID']])
					   && $_POST['remove' . $Row['ID']] == '1')
					{
						//remove installation task if it still exists

						$this->db->query('DELETE FROM `' . TABLE_APS_TASKS . '` WHERE `InstanceID` = ' . (int)$Row['ID'] . ' AND `Task` = ' . TASK_INSTALL);

						//insert task for uninstallation if it doesnt exists already

						$Result2 = $this->db->query('SELECT * FROM `' . TABLE_APS_TASKS . '` WHERE `InstanceID` = ' . (int)$Row['ID'] . ' AND `Task` = ' . TASK_REMOVE);

						if($this->db->num_rows($Result2) == 0)
						{
							$this->db->query('INSERT INTO `' . TABLE_APS_TASKS . '` (`InstanceID`, `Task`) VALUES (' . (int)$Row['ID'] . ', ' . TASK_REMOVE . ')');
							$this->db->query('UPDATE `' . TABLE_APS_INSTANCES . '` SET `Status` = ' . INSTANCE_UNINSTALL . ' WHERE `ID` = ' . (int)$Row['ID']);
							$this->db->query('UPDATE `' . TABLE_PANEL_CUSTOMERS . '` SET `aps_packages_used` = `aps_packages_used` - 1 WHERE `customerid` = ' . (int)$Row['	CustomerID']);
						}
					}
				}
				else
				{
					//backup all selected ids for yes/no question

					if(isset($_POST['stop' . $Row['ID']])
					   && $_POST['stop' . $Row['ID']] == '1')
					{
						$Ids.= '<input type="hidden" name="stop' . $Row['ID'] . '" value="1"/>';
					}

					if(isset($_POST['remove' . $Row['ID']])
					   && $_POST['remove' . $Row['ID']] == '1')
					{
						$Ids.= '<input type="hidden" name="remove' . $Row['ID'] . '" value="1"/>';
					}
				}
			}

			//if there are some ids, show yes/no question

			if($Ids != ''
			   && !isset($_POST['answer']))
			{
				//show yes/no question

				$Message = $lng['question']['reallydoaction'];
				eval("echo \"" . getTemplate("aps/askyesno") . "\";");
				$Question = true;
			}
		}

		//create table with contents based on instance status

		if($Question != true)
		{
			//INSTALL

			$InstancesInstall = '';

			if((int)$this->userinfo['customers_see_all'] == 1)
			{
				$Result = $this->db->query('SELECT `p`.`Name`, `p`.`Version`, `p`.`Release`, `i`.`PackageID` FROM `' . TABLE_APS_INSTANCES . '` AS `i` INNER JOIN `' . TABLE_APS_PACKAGES . '` AS `p` ON `i`.`PackageID` = `p`.`ID` WHERE `i`.`Status` = ' . INSTANCE_INSTALL . ' GROUP BY `Version`, `Release`');
			}
			else
			{
				$Result = $this->db->query('SELECT `p`.`Name`, `p`.`Version`, `p`.`Release`, `i`.`PackageID` FROM `' . TABLE_APS_INSTANCES . '` AS `i` INNER JOIN `' . TABLE_APS_PACKAGES . '` AS `p` ON `i`.`PackageID` = `p`.`ID` INNER JOIN `' . TABLE_PANEL_CUSTOMERS . '` AS `c` ON `i`.`CustomerID` = `c`.`customerid` WHERE `i`.`Status` = ' . INSTANCE_INSTALL . ' AND `c`.`adminid` = ' . (int)$this->userinfo['adminid'] . ' GROUP BY `Version`, `Release`');
			}

			while($Row = $this->db->fetch_array($Result))
			{
				eval("\$InstancesInstall.=\"" . getTemplate("aps/manage_instances_package") . "\";");

				//get instances

				if((int)$this->userinfo['customers_see_all'] == 1)
				{
					$Result2 = $this->db->query('SELECT * FROM `' . TABLE_APS_INSTANCES . '` WHERE `Status` = ' . INSTANCE_INSTALL . ' AND `PackageID` = ' . $Row['PackageID']);
				}
				else
				{
					$Result2 = $this->db->query('SELECT * FROM `' . TABLE_APS_INSTANCES . '` AS `i` INNER JOIN `' . TABLE_PANEL_CUSTOMERS . '` AS `c` ON `i`.`CustomerID` = `c`.`customerid` WHERE `i`.`Status` = ' . INSTANCE_INSTALL . ' AND `i`.`PackageID` = ' . $Row['PackageID'] . ' AND `c`.`adminid` = ' . (int)$this->userinfo['adminid']);
				}

				while($Row2 = $this->db->fetch_array($Result2))
				{
					//get customer name

					$Result3 = $this->db->query('SELECT * FROM `' . TABLE_PANEL_CUSTOMERS . '` WHERE `customerid` = ' . $Row2['CustomerID']);
					$Row3 = $this->db->fetch_array($Result3);
					$Stop = makecheckbox('stop' . $Row2['ID'], '', '1');
					eval("\$InstancesInstall.=\"" . getTemplate("aps/manage_instances_install") . "\";");
				}
			}

			//TASK ACTIVE

			$InstancesTaskActive = '';

			if((int)$this->userinfo['customers_see_all'] == 1)
			{
				$Result = $this->db->query('SELECT `p`.`Name`, `p`.`Version`, `p`.`Release`, `i`.`PackageID` FROM `' . TABLE_APS_INSTANCES . '` AS `i` INNER JOIN `' . TABLE_APS_PACKAGES . '` AS `p` ON `i`.`PackageID` = `p`.`ID` WHERE `i`.`Status` = ' . INSTANCE_TASK_ACTIVE . ' GROUP BY `Version`, `Release`');
			}
			else
			{
				$Result = $this->db->query('SELECT `p`.`Name`, `p`.`Version`, `p`.`Release`, `i`.`PackageID` FROM `' . TABLE_APS_INSTANCES . '` AS `i` INNER JOIN `' . TABLE_APS_PACKAGES . '` AS `p` ON `i`.`PackageID` = `p`.`ID` INNER JOIN `' . TABLE_PANEL_CUSTOMERS . '` AS `c` ON `i`.`CustomerID` = `c`.`customerid` WHERE `i`.`Status` = ' . INSTANCE_TASK_ACTIVE . ' AND `c`.`adminid` = ' . (int)$this->userinfo['adminid'] . ' GROUP BY `Version`, `Release`');
			}

			while($Row = $this->db->fetch_array($Result))
			{
				eval("\$InstancesTaskActive.=\"" . getTemplate("aps/manage_instances_package") . "\";");

				//get instances

				if((int)$this->userinfo['customers_see_all'] == 1)
				{
					$Result2 = $this->db->query('SELECT * FROM `' . TABLE_APS_INSTANCES . '` WHERE `Status` = ' . INSTANCE_TASK_ACTIVE . ' AND `PackageID` = ' . $Row['PackageID']);
				}
				else
				{
					$Result2 = $this->db->query('SELECT * FROM `' . TABLE_APS_INSTANCES . '` AS `i` INNER JOIN `' . TABLE_PANEL_CUSTOMERS . '` AS `c` ON `i`.`CustomerID` = `c`.`customerid` WHERE `i`.`Status` = ' . INSTANCE_TASK_ACTIVE . ' AND `i`.`PackageID` = ' . $Row['PackageID'] . ' AND `c`.`adminid` = ' . (int)$this->userinfo['adminid']);
				}

				while($Row2 = $this->db->fetch_array($Result2))
				{
					//get customer name

					$Result3 = $this->db->query('SELECT * FROM `' . TABLE_PANEL_CUSTOMERS . '` WHERE `customerid` = ' . $Row2['CustomerID']);
					$Row3 = $this->db->fetch_array($Result3);
					eval("\$InstancesTaskActive.=\"" . getTemplate("aps/manage_instances_taskactive") . "\";");
				}
			}

			//SUCCESS

			$InstancesSuccess = '';

			if((int)$this->userinfo['customers_see_all'] == 1)
			{
				$Result = $this->db->query('SELECT `p`.`Name`, `p`.`Version`, `p`.`Release`, `i`.`PackageID` FROM `' . TABLE_APS_INSTANCES . '` AS `i` INNER JOIN `' . TABLE_APS_PACKAGES . '` AS `p` ON `i`.`PackageID` = `p`.`ID` WHERE `i`.`Status` = ' . INSTANCE_SUCCESS . ' GROUP BY `Version`, `Release`');
			}
			else
			{
				$Result = $this->db->query('SELECT `p`.`Name`, `p`.`Version`, `p`.`Release`, `i`.`PackageID` FROM `' . TABLE_APS_INSTANCES . '` AS `i` INNER JOIN `' . TABLE_APS_PACKAGES . '` AS `p` ON `i`.`PackageID` = `p`.`ID` INNER JOIN `' . TABLE_PANEL_CUSTOMERS . '` AS `c` ON `i`.`CustomerID` = `c`.`customerid` WHERE `i`.`Status` = ' . INSTANCE_SUCCESS . ' AND `c`.`adminid` = ' . (int)$this->userinfo['adminid'] . ' GROUP BY `Version`, `Release`');
			}

			while($Row = $this->db->fetch_array($Result))
			{
				eval("\$InstancesSuccess.=\"" . getTemplate("aps/manage_instances_package") . "\";");

				//get instances

				if((int)$this->userinfo['customers_see_all'] == 1)
				{
					$Result2 = $this->db->query('SELECT * FROM `' . TABLE_APS_INSTANCES . '` WHERE `Status` = ' . INSTANCE_SUCCESS . ' AND `PackageID` = ' . $Row['PackageID']);
				}
				else
				{
					$Result2 = $this->db->query('SELECT * FROM `' . TABLE_APS_INSTANCES . '` AS `i` INNER JOIN `' . TABLE_PANEL_CUSTOMERS . '` AS `c` ON `i`.`CustomerID` = `c`.`customerid` WHERE `i`.`Status` = ' . INSTANCE_SUCCESS . ' AND `i`.`PackageID` = ' . $Row['PackageID'] . ' AND `c`.`adminid` = ' . (int)$this->userinfo['adminid']);
				}

				while($Row2 = $this->db->fetch_array($Result2))
				{
					//get customer name

					$Result3 = $this->db->query('SELECT * FROM `' . TABLE_PANEL_CUSTOMERS . '` WHERE `customerid` = ' . $Row2['CustomerID']);
					$Row3 = $this->db->fetch_array($Result3);
					$Remove = makecheckbox('remove' . $Row2['ID'], '', '1');
					eval("\$InstancesSuccess.=\"" . getTemplate("aps/manage_instances_success") . "\";");
				}
			}

			//ERROR

			$InstancesError = '';

			if((int)$this->userinfo['customers_see_all'] == 1)
			{
				$Result = $this->db->query('SELECT `p`.`Name`, `p`.`Version`, `p`.`Release`, `i`.`PackageID` FROM `' . TABLE_APS_INSTANCES . '` AS `i` INNER JOIN `' . TABLE_APS_PACKAGES . '` AS `p` ON `i`.`PackageID` = `p`.`ID` WHERE `i`.`Status` = ' . INSTANCE_ERROR . ' GROUP BY `Version`, `Release`');
			}
			else
			{
				$Result = $this->db->query('SELECT `p`.`Name`, `p`.`Version`, `p`.`Release`, `i`.`PackageID` FROM `' . TABLE_APS_INSTANCES . '` AS `i` INNER JOIN `' . TABLE_APS_PACKAGES . '` AS `p` ON `i`.`PackageID` = `p`.`ID` INNER JOIN `' . TABLE_PANEL_CUSTOMERS . '` AS `c` ON `i`.`CustomerID` = `c`.`customerid` WHERE `i`.`Status` = ' . INSTANCE_ERROR . ' AND `c`.`adminid` = ' . (int)$this->userinfo['adminid'] . ' GROUP BY `Version`, `Release`');
			}

			while($Row = $this->db->fetch_array($Result))
			{
				eval("\$InstancesError.=\"" . getTemplate("aps/manage_instances_package") . "\";");

				//get instances

				if((int)$this->userinfo['customers_see_all'] == 1)
				{
					$Result2 = $this->db->query('SELECT * FROM `' . TABLE_APS_INSTANCES . '` WHERE `Status` = ' . INSTANCE_ERROR . ' AND `PackageID` = ' . $Row['PackageID']);
				}
				else
				{
					$Result2 = $this->db->query('SELECT * FROM `' . TABLE_APS_INSTANCES . '` AS `i` INNER JOIN `' . TABLE_PANEL_CUSTOMERS . '` AS `c` ON `i`.`CustomerID` = `c`.`customerid` WHERE `i`.`Status` = ' . INSTANCE_ERROR . ' AND `i`.`PackageID` = ' . $Row['PackageID'] . ' AND `c`.`adminid` = ' . (int)$this->userinfo['adminid']);
				}

				while($Row2 = $this->db->fetch_array($Result2))
				{
					//get customer name

					$Result3 = $this->db->query('SELECT * FROM `' . TABLE_PANEL_CUSTOMERS . '` WHERE `customerid` = ' . $Row2['CustomerID']);
					$Row3 = $this->db->fetch_array($Result3);
					$Remove = makecheckbox('remove' . $Row2['ID'], '', '1');
					eval("\$InstancesError.=\"" . getTemplate("aps/manage_instances_error") . "\";");
				}
			}

			//UNINSTALL

			$InstancesUninstall = '';

			if((int)$this->userinfo['customers_see_all'] == 1)
			{
				$Result = $this->db->query('SELECT `p`.`Name`, `p`.`Version`, `p`.`Release`, `i`.`PackageID` FROM `' . TABLE_APS_INSTANCES . '` AS `i` INNER JOIN `' . TABLE_APS_PACKAGES . '` AS `p` ON `i`.`PackageID` = `p`.`ID` WHERE `i`.`Status` = ' . INSTANCE_UNINSTALL . ' GROUP BY `Version`, `Release`');
			}
			else
			{
				$Result = $this->db->query('SELECT `p`.`Name`, `p`.`Version`, `p`.`Release`, `i`.`PackageID` FROM `' . TABLE_APS_INSTANCES . '` AS `i` INNER JOIN `' . TABLE_APS_PACKAGES . '` AS `p` ON `i`.`PackageID` = `p`.`ID` INNER JOIN `' . TABLE_PANEL_CUSTOMERS . '` AS `c` ON `i`.`CustomerID` = `c`.`customerid` WHERE `i`.`Status` = ' . INSTANCE_UNINSTALL . ' AND `c`.`adminid` = ' . (int)$this->userinfo['adminid'] . ' GROUP BY `Version`, `Release`');
			}

			while($Row = $this->db->fetch_array($Result))
			{
				eval("\$InstancesUninstall.=\"" . getTemplate("aps/manage_instances_package") . "\";");

				//get instances

				if((int)$this->userinfo['customers_see_all'] == 1)
				{
					$Result2 = $this->db->query('SELECT * FROM `' . TABLE_APS_INSTANCES . '` WHERE `Status` = ' . INSTANCE_UNINSTALL . ' AND `PackageID` = ' . $Row['PackageID']);
				}
				else
				{
					$Result2 = $this->db->query('SELECT * FROM `' . TABLE_APS_INSTANCES . '` AS `i` INNER JOIN `' . TABLE_PANEL_CUSTOMERS . '` AS `c` ON `i`.`CustomerID` = `c`.`customerid` WHERE `i`.`Status` = ' . INSTANCE_UNINSTALL . ' AND `i`.`PackageID` = ' . $Row['PackageID'] . ' AND `c`.`adminid` = ' . (int)$this->userinfo['adminid']);
				}

				while($Row2 = $this->db->fetch_array($Result2))
				{
					//get customer name

					$Result3 = $this->db->query('SELECT * FROM `' . TABLE_PANEL_CUSTOMERS . '` WHERE `customerid` = ' . $Row2['CustomerID']);
					$Row3 = $this->db->fetch_array($Result3);
					eval("\$InstancesUninstall.=\"" . getTemplate("aps/manage_instances_uninstall") . "\";");
				}
			}

			//create some statistics

			$Statistics = '';

			if((int)$this->userinfo['customers_see_all'] == 1)
			{
				$Result = $this->db->query('SELECT * FROM `' . TABLE_APS_INSTANCES . '`');
				$Statistics.= sprintf($lng['aps']['numerofinstances'], $this->db->num_rows($Result));
				$Result = $this->db->query('SELECT * FROM `' . TABLE_APS_INSTANCES . '` WHERE `Status` = ' . INSTANCE_SUCCESS);
				$Statistics.= sprintf($lng['aps']['numerofinstancessuccess'], $this->db->num_rows($Result));
				$Result = $this->db->query('SELECT * FROM `' . TABLE_APS_INSTANCES . '` WHERE `Status` = ' . INSTANCE_ERROR);
				$Statistics.= sprintf($lng['aps']['numerofinstanceserror'], $this->db->num_rows($Result));
				$Result = $this->db->query('SELECT * FROM `' . TABLE_APS_INSTANCES . '` WHERE `Status` IN (' . INSTANCE_INSTALL . ', ' . INSTANCE_TASK_ACTIVE . ', ' . INSTANCE_UNINSTALL . ')');
				$Statistics.= sprintf($lng['aps']['numerofinstancesaction'], $this->db->num_rows($Result));
			}
			else
			{
				$Result = $this->db->query('SELECT * FROM `' . TABLE_APS_INSTANCES . '` AS `i` INNER JOIN `' . TABLE_PANEL_CUSTOMERS . '` AS `c` ON `i`.`CustomerID` = `c`.`customerid` WHERE `c`.`adminid` = ' . (int)$this->userinfo['adminid']);
				$Statistics.= sprintf($lng['aps']['numerofinstances'], $this->db->num_rows($Result));
				$Result = $this->db->query('SELECT * FROM `' . TABLE_APS_INSTANCES . '` AS `i` INNER JOIN `' . TABLE_PANEL_CUSTOMERS . '` AS `c` ON `i`.`CustomerID` = `c`.`customerid` WHERE `c`.`adminid` = ' . (int)$this->userinfo['adminid'] . ' AND `Status` = ' . INSTANCE_SUCCESS);
				$Statistics.= sprintf($lng['aps']['numerofinstancessuccess'], $this->db->num_rows($Result));
				$Result = $this->db->query('SELECT * FROM `' . TABLE_APS_INSTANCES . '` AS `i` INNER JOIN `' . TABLE_PANEL_CUSTOMERS . '` AS `c` ON `i`.`CustomerID` = `c`.`customerid` WHERE `c`.`adminid` = ' . (int)$this->userinfo['adminid'] . ' AND `Status` = ' . INSTANCE_ERROR);
				$Statistics.= sprintf($lng['aps']['numerofinstanceserror'], $this->db->num_rows($Result));
				$Result = $this->db->query('SELECT * FROM `' . TABLE_APS_INSTANCES . '` AS `i` INNER JOIN `' . TABLE_PANEL_CUSTOMERS . '` AS `c` ON `i`.`CustomerID` = `c`.`customerid` WHERE `c`.`adminid` = ' . (int)$this->userinfo['adminid'] . ' AND `Status` IN (' . INSTANCE_INSTALL . ', ' . INSTANCE_TASK_ACTIVE . ', ' . INSTANCE_UNINSTALL . ')');
				$Statistics.= sprintf($lng['aps']['numerofinstancesaction'], $this->db->num_rows($Result));
			}

			eval("echo \"" . getTemplate("aps/manage_instances") . "\";");
		}
	}

	/**
	 * unlink files recursively
	 *
	 * @param	dir			directory to delete recursive
	 */

	protected function UnlinkRecursive($Dir)
	{
		if(!$DirHandle = @opendir($Dir))return;

		while(false !== ($Object = readdir($DirHandle)))
		{
			if($Object == '.'
			   || $Object == '..')continue;

			if(!@unlink($Dir . '/' . $Object))
			{
				self::UnlinkRecursive($Dir . '/' . $Object);
			}
		}

		closedir($DirHandle);
		@rmdir($Dir);
	}

	/**
	 * function provides package management for admins
	 */

	private function ManagePackages()
	{
		global $lng, $filename, $s, $page, $action;
		$Question = false;

		if(isset($_POST['save']))
		{
			if(isset($_POST['all'])
			   && $_POST['all'] == 'lock')
			{
				//lock alle packages

				$this->db->query('UPDATE `' . TABLE_APS_PACKAGES . '` SET `Status` = ' . PACKAGE_LOCKED . ' WHERE 1');
			}
			elseif(isset($_POST['all'])
			       && $_POST['all'] == 'unlock')
			{
				//enable all packages

				$this->db->query('UPDATE `' . TABLE_APS_PACKAGES . '` SET `Status` = ' . PACKAGE_ENABLED . ' WHERE 1');
			}
			elseif(isset($_POST['downloadallpackages']))
			{
				$Result = $this->db->query('SELECT * FROM `' . TABLE_APS_TASKS . '` WHERE `Task` = ' . TASK_SYSTEM_DOWNLOAD);

				if($this->db->num_rows($Result) > 0)
				{
					self::InfoBox($lng['aps']['downloadtaskexists']);
				}
				else
				{
					$this->db->query('INSERT INTO `' . TABLE_APS_TASKS . '` (`Task`, `InstanceID`) VALUES (' . TASK_SYSTEM_DOWNLOAD . ', 0)');
					self::InfoBox($lng['aps']['downloadtaskinserted']);
				}
			}
			elseif(isset($_POST['updateallpackages']))
			{
				$Result = $this->db->query('SELECT * FROM `' . TABLE_APS_TASKS . '` WHERE `Task` = ' . TASK_SYSTEM_UPDATE);

				if($this->db->num_rows($Result) > 0)
				{
					self::InfoBox($lng['aps']['updatetaskexists']);
				}
				else
				{
					$this->db->query('INSERT INTO `' . TABLE_APS_TASKS . '` (`Task`, `InstanceID`) VALUES (' . TASK_SYSTEM_UPDATE . ', 0)');
					self::InfoBox($lng['aps']['updatetaskinserted']);
				}
			}
			elseif(isset($_POST['enablenewest']))
			{
				//lock alle packages, then find newerst package and enable it

				$this->db->query('UPDATE `' . TABLE_APS_PACKAGES . '` SET `Status` = ' . PACKAGE_LOCKED);

				//get all packages

				$Result = $this->db->query('SELECT * FROM `' . TABLE_APS_PACKAGES . '` GROUP BY `Name`');

				while($Row = $this->db->fetch_array($Result))
				{
					//get newest version of package

					$NewestVersion = '';
					$NewestId = '';
					$Result2 = $this->db->query('SELECT * FROM `' . TABLE_APS_PACKAGES . '` WHERE `Name` = "' . $this->db->escape($Row['Name']) . '"');

					while($Row2 = $this->db->fetch_array($Result2))
					{
						if(version_compare($Row2['Version'] . '-' . $Row2['Release'], $NewestVersion) == 1)
						{
							$NewestVersion = $Row2['Version'] . '-' . $Row2['Release'];
							$NewestId = $Row2['ID'];
						}
					}

					//enable newest version

					$this->db->query('UPDATE `' . TABLE_APS_PACKAGES . '` SET `Status` = ' . PACKAGE_ENABLED . ' WHERE `ID` = ' . $NewestId);
				}
			}
			elseif(isset($_POST['removeunused']))
			{
				//remove all packages which have no dependencies (count of package instances = 0)

				if(isset($_POST['answer'])
				   && $_POST['answer'] == $lng['panel']['yes'])
				{
					//get all packages

					$Result = $this->db->query('SELECT * FROM `' . TABLE_APS_PACKAGES . '`');

					while($Row = $this->db->fetch_array($Result))
					{
						//query how often package has been installed

						$Result2 = $this->db->query('SELECT * FROM `' . TABLE_APS_INSTANCES . '` WHERE `PackageID` = ' . $Row['ID']);

						if($this->db->num_rows($Result2) == 0)
						{
							//remove package if number of package instances is 0

							self::UnlinkRecursive('./packages/' . $Row['Path']);
							$this->db->query('DELETE FROM `' . TABLE_APS_PACKAGES . '` WHERE `ID` = ' . $Row['ID']);
						}
					}
				}
				else
				{
					//show yes/no question

					$Message = $lng['question']['reallyremovepackages'];
					$Ids = '<input type="hidden" name="removeunused" value="1"/>';
					eval("echo \"" . getTemplate("aps/askyesno") . "\";");
					$Question = true;
				}
			}
			elseif(isset($_POST['all'])
			       && $_POST['all'] == 'remove')
			{
				//remove all packages from system

				if(isset($_POST['answer'])
				   && $_POST['answer'] == $lng['panel']['yes'])
				{
					$Result = $this->db->query('SELECT * FROM `' . TABLE_APS_PACKAGES . '`');

					//check for dependencies

					while($Row = $this->db->fetch_array($Result))
					{
						//query how often package has been installed

						$Result2 = $this->db->query('SELECT * FROM `' . TABLE_APS_INSTANCES . '` WHERE `PackageID` = ' . $Row['ID']);

						if($this->db->num_rows($Result2) == 0)
						{
							//remove package if number of package instances is 0

							self::UnlinkRecursive('./packages/' . $Row['Path']);
							$this->db->query('DELETE FROM `' . TABLE_APS_PACKAGES . '` WHERE `ID` = ' . $Row['ID']);
						}
					}
				}
				else
				{
					//show yes/no question

					$Message = $lng['question']['reallyremovepackages'];
					$Ids = '<input type="hidden" name="all" value="remove"/>';
					eval("echo \"" . getTemplate("aps/askyesno") . "\";");
					$Question = true;
				}
			}
			else
			{
				//no special button or "all" function has been clicked
				//continue to parse "single" options

				$Result = $this->db->query('SELECT * FROM `' . TABLE_APS_PACKAGES . '`');
				$Ids = '';

				while($Row = $this->db->fetch_array($Result))
				{
					//set new status of package (locked)

					if($Row['Status'] == PACKAGE_ENABLED
					   && isset($_POST['lock' . $Row['ID']]))
					{
						$this->db->query('UPDATE `' . TABLE_APS_PACKAGES . '` SET `Status` = ' . PACKAGE_LOCKED . ' WHERE `ID` = ' . $this->db->escape($Row['ID']));
					}

					//set new status of package (enabled)

					if($Row['Status'] == PACKAGE_LOCKED
					   && isset($_POST['unlock' . $Row['ID']]))
					{
						$this->db->query('UPDATE `' . TABLE_APS_PACKAGES . '` SET `Status` = ' . PACKAGE_ENABLED . ' WHERE `ID` = ' . $this->db->escape($Row['ID']));
					}

					//save id of package to remove for yes/no question

					if(isset($_POST['remove' . $Row['ID']]))
					{
						$Ids.= '<input type="hidden" name="remove' . $Row['ID'] . '" value="1"/>';

						//remove package if answer is yes

						if(isset($_POST['answer'])
						   && $_POST['answer'] == $lng['panel']['yes'])
						{
							self::UnlinkRecursive('./packages/' . $Row['Path']);
							$this->db->query('DELETE FROM `' . TABLE_APS_PACKAGES . '` WHERE `ID` = ' . $Row['ID']);
						}
					}
				}

				//if there are some ids to remove, show yes/no box

				if($Ids != ''
				   && !isset($_POST['answer']))
				{
					//show yes/no question

					$Message = $lng['question']['reallyremovepackages'];
					eval("echo \"" . getTemplate("aps/askyesno") . "\";");
					$Question = true;
				}
			}
		}

		//show package overview with options

		if(!isset($_POST['save'])
		   || $Question == false)
		{
			//query all packages grouped by package name

			$Result = $this->db->query('SELECT * FROM `' . TABLE_APS_PACKAGES . '` GROUP BY `Name` ORDER BY `Name` ASC');
			$Packages = '';

			while($Row = $this->db->fetch_array($Result))
			{
				eval("\$Packages.=\"" . getTemplate("aps/manage_packages_row") . "\";");

				//get all package versions of current package

				$Result2 = $this->db->query('SELECT * FROM `' . TABLE_APS_PACKAGES . '` WHERE `Name` = "' . $this->db->escape($Row['Name']) . '" ORDER BY `Version` DESC, `Release` DESC');

				while($Row2 = $this->db->fetch_array($Result2))
				{
					//show package with options

					$Lock = '';
					$Unlock = '';

					if($Row2['Status'] == PACKAGE_ENABLED)
					{
						$Lock = makecheckbox('lock' . $Row2['ID'], '', '1');
					}

					if($Row2['Status'] == PACKAGE_LOCKED)
					{
						$Unlock = makecheckbox('unlock' . $Row2['ID'], '', '1');
					}

					//query how often package has been installed

					$Result3 = $this->db->query('SELECT * FROM `' . TABLE_APS_INSTANCES . '` WHERE `PackageID` = ' . $Row2['ID']);
					$Installations = $this->db->num_rows($Result3);

					if($Installations == 0)$Remove = makecheckbox('remove' . $Row2['ID'], '', '1');
					eval("\$Packages.=\"" . getTemplate("aps/manage_packages_detail") . "\";");
				}
			}

			if($this->db->num_rows($Result) == 0)
			{
				//no packages have been installed in system

				self::InfoBox($lng['aps']['nopackagesinsystem']);
				eval("echo \"" . getTemplate("aps/manage_packages_download") . "\";");
			}
			else
			{
				//generate some statistics

				$Result = $this->db->query('SELECT * FROM `' . TABLE_APS_PACKAGES . '`');
				$Temp = $this->db->num_rows($Result);
				$Statistics = sprintf($lng['aps']['numerofpackagesinstalled'], $this->db->num_rows($Result));
				$Result = $this->db->query('SELECT * FROM `' . TABLE_APS_PACKAGES . '` WHERE `Status` = ' . PACKAGE_ENABLED);
				$Statistics.= sprintf($lng['aps']['numerofpackagesenabled'], $this->db->num_rows($Result));
				$Statistics.= sprintf($lng['aps']['numerofpackageslocked'], $Temp - $this->db->num_rows($Result));

				if((int)$this->userinfo['customers_see_all'] == 1)
				{
					$Result = $this->db->query('SELECT * FROM `' . TABLE_APS_INSTANCES . '`');
					$Statistics.= sprintf($lng['aps']['numerofinstances'], $this->db->num_rows($Result));
				}
				else
				{
					$Result = $this->db->query('SELECT * FROM `' . TABLE_APS_INSTANCES . '` AS `i` INNER JOIN `' . TABLE_PANEL_CUSTOMERS . '` AS `c` ON `i`.`CustomerID` = `c`.`customerid` WHERE `c`.`adminid` = ' . (int)$this->userinfo['adminid']);
					$Statistics.= sprintf($lng['aps']['numerofinstances'], $this->db->num_rows($Result));
				}

				eval("echo \"" . getTemplate("aps/manage_packages") . "\";");
			}
		}
	}

	/**
	 * function provides a upload site for new packages
	 */

	private function UploadNewPackages()
	{
		global $lng, $filename, $s, $page, $action;

		//define how many files can be uploaded at once

		$Files = array();

		//define how many upload fields will be shown

		for ($i = 1;$i <= (int)$this->settings['aps']['upload_fields'];$i++)
		{
			$Files[] = 'file' . $i;
		}

		//check whether one file has been uploaded

		$FilesSet = false;
		foreach($Files as $File)
		{
			if(isset($_FILES[$File]))$FilesSet = true;
		}

		if($FilesSet == true)
		{
			//any file has been uploaded, now check for errors and parse the input

			foreach($Files as $File)
			{
				if(isset($_FILES[$File]))
				{
					$Errors = array();

					//check uploaded files against some things
					//check for filetype

					if(substr($_FILES[$File]['name'], -3) != 'zip'
					   && $_FILES[$File]['error'] == 0)
					{
						$Errors[] = $lng['aps']['notazipfile'];
					}

					//check for filesize

					if(($_FILES[$File]['size'] > self::PhpMemorySizeToBytes(ini_get('upload_max_filesize')) && $_FILES[$File]['error'] == 0)
					   || $_FILES[$File]['error'] == 1)
					{
						$Errors[] = $lng['aps']['filetoobig'];
					}

					//check is file isnt complete

					if($_FILES[$File]['error'] == 3)
					{
						$Errors[] = $lng['aps']['filenotcomplete'];
					}

					//check for other php internal errors

					if($_FILES[$File]['error'] >= 6)
					{
						$Errors[] = $lng['aps']['phperror'] . (int)$_FILES[$File]['error'];
					}

					//all checks are ok, try to install the package

					if(count($Errors) == 0
					   && $_FILES[$File]['error'] == 0)
					{
						//install package in system

						if(move_uploaded_file($_FILES[$File]['tmp_name'], './temp/' . basename($_FILES[$File]['name'])) == true)
						{
							self::InstallNewPackage('./temp/' . basename($_FILES[$File]['name']));
						}
						else
						{
							$moveproblem = str_replace('{$path}', $this->RootDir, $lng['aps']['moveproblem']);
							$Errors[] = $moveproblem;
						}
					}

					if(count($Errors) > 0)
					{
						//throw errors

						$ErrorMessage = '';
						foreach($Errors as $Error)
						{
							$ErrorMessage.= '<li>' . $Error . '</li>';
						}

						self::InfoBox(sprintf($lng['aps']['uploaderrors'], htmlspecialchars($_FILES[$File]['name']), $ErrorMessage));
					}
				}
			}
		}

		//generate upload fields

		$Output = '';
		foreach($Files as $File)
		{
			$Output.= '<input size="60" name="' . $File . '" type="file" /><br/><br/>';
		}

		eval("echo \"" . getTemplate("aps/upload") . "\";");
	}

	/**
	 * function provides a frontend for customers to search packages
	 */

	private function SearchPackages()
	{
		global $lng, $filename, $s, $page, $action;
		$Error = 0;
		$Ids = array();
		$ShowAll = 0;

		if(isset($_GET['keyword'])
		   && preg_match('/^[- _0-9a-z\.,:;]+$/i', $_GET['keyword']) != false)
		{
			//split all keywords

			$Elements = preg_split('/[ ,;]/', trim($_GET['keyword']));

			if(count($Elements) == 1
			   && strlen($Elements[0]) == 0)
			{
				//no keyword given -> show all packages

				$ShowAll = 1;
			}
			else
			{
				foreach($Elements as $Key)
				{
					//skip empty values -> prevents that whitespaces lead to the result that all packages will be found

					if($Key == '')continue;
					$result = $this->db->query('SELECT * FROM `' . TABLE_APS_PACKAGES . '` WHERE `Status` = ' . PACKAGE_ENABLED . ' AND (`Name` LIKE "%' . $this->db->escape($Key) . '%" OR `Path` LIKE "%' . $this->db->escape($Key) . '%" OR `Version` LIKE "%' . $this->db->escape($Key) . '%") ');

					//check if keyword got a result

					if($this->db->num_rows($result) > 0)
					{
						//add all package ids which match to result array

						while($Temp = $this->db->fetch_array($result))
						{
							if(!in_array($Temp['ID'], $Ids))$Ids[] = $Temp['ID'];
						}
					}
				}

				//no matches found to given keywords

				if(count($Ids) == 0)
				{
					$Error = 2;
				}
			}
		}
		elseif(isset($_GET['keyword'])
		       && strlen($_GET['keyword']) != 0)
		{
			//input contains illegal characters

			$Error = 1;
		}
		elseif(isset($_GET['keyword'])
		       && strlen($_GET['keyword']) == 0)
		{
			//nothing has been entered - show all packages

			$ShowAll = 1;
		}

		//show errors

		if($Error == 1)
		{
			self::InfoBox($lng['aps']['nospecialchars']);
		}
		elseif($Error == 2)
		{
			self::InfoBox($lng['aps']['noitemsfound']);
		}

		//show keyword only if format is ok

		$Keyword = '';

		if(isset($_GET['keyword'])
		   && $Error == 0)$Keyword = htmlspecialchars($_GET['keyword']);
		eval("echo \"" . getTemplate("aps/search") . "\";");

		//show results

		if(($Error == 0 && count($Ids) > 0)
		   || $ShowAll == 1)
		{
			//run query based on search results

			if($ShowAll != 1)
			{
				$result = $this->db->query('SELECT * FROM `' . TABLE_APS_PACKAGES . '` WHERE `ID` IN (' . $this->db->escape(implode(',', $Ids)) . ')');
			}
			else
			{
				$result = $this->db->query('SELECT * FROM `' . TABLE_APS_PACKAGES . '` WHERE `Status` = ' . PACKAGE_ENABLED);
			}

			//show package infos

			if($this->db->num_rows($result) > 0)
			{
				if($this->db->num_rows($result) == 1)
				{
					self::InfoBox(sprintf($lng['aps']['searchoneresult'], $this->db->num_rows($result)));
				}
				else
				{
					self::InfoBox(sprintf($lng['aps']['searchmultiresult'], $this->db->num_rows($result)));
				}

				while($Row = $this->db->fetch_array($result))
				{
					self::ShowPackageInfo($Row['ID']);
				}
			}
		}
	}

	/**
	 * function provides a frontend for customers to show the status of installed packages
	 *
	 * @param	customerid	id of customer from database
	 */

	private function CustomerStatus($CustomerId)
	{
		global $lng, $filename, $s, $page, $action;
		$Data = '';
		$Fieldname = '';
		$Fieldvalue = '';
		$Groupname = '';
		$result = $this->db->query('SELECT * FROM `' . TABLE_APS_INSTANCES . '` WHERE `CustomerID` = ' . $this->db->escape($CustomerId));

		//customer hasnt installed any package yet

		if($this->db->num_rows($result) == 0)
		{
			self::InfoBox($lng['aps']['nopackagesinstalled']);
			return;
		}

		while($Row = $this->db->fetch_array($result))
		{
			$Data = '';
			$result2 = $this->db->query('SELECT * FROM `' . TABLE_APS_PACKAGES . '` WHERE `ID` = ' . $this->db->escape($Row['PackageID']));
			$Row2 = $this->db->fetch_array($result2);
			$Xml = self::GetXmlFromFile('./packages/' . $Row2['Path'] . '/APP-META.xml');

			//skip if parse of xml has failed

			if($Xml == false)continue;
			$Icon = './images/default.png';

			$this->aps_version = isset($Xml->attributes()->version) ? (string)$Xml->attributes()->version : '1.0';

			//show data and status of package

			if($this->aps_version != '1.0')
			{
				$iconpath = $Xml->presentation->icon['path'];
				$Summary = htmlspecialchars($Xml->presentation->summary);
			} 
			else
			{
				$iconpath = $Xml->icon['path'];
				$Summary = htmlspecialchars($Xml->summary);
			}

			if($iconpath)
			{
				$Icon = './packages/' . $Row2['Path'] . '/' . basename($iconpath);
			}

			$Fieldname = $lng['aps']['version'];
			$Fieldvalue = $Xml->version . ' (Release ' . $Xml->release . ')';
			eval("\$Data.=\"" . getTemplate("aps/data") . "\";");
			$Temp = '';

			switch($Row['Status'])
			{
				case INSTANCE_INSTALL:
					$Temp.= $lng['aps']['instance_install'];
					break;
				case INSTANCE_TASK_ACTIVE:
					$Temp.= $lng['aps']['instance_task_active'];
					break;
				case INSTANCE_SUCCESS:
					$Temp.= $lng['aps']['instance_success'];
					break;
				case INSTANCE_ERROR:
					$Temp.= $lng['aps']['instance_error'];
					break;
				case INSTANCE_UNINSTALL:
					$Temp.= $lng['aps']['instance_uninstall'];
					break;
				default:
					$Temp.= $lng['aps']['unknown_status'];
					break;
			}

			$Fieldname = $lng['aps']['currentstatus'];
			$Fieldvalue = $Temp;
			eval("\$Data.=\"" . getTemplate("aps/data") . "\";");
			$result2 = $this->db->query('SELECT * FROM `' . TABLE_APS_TASKS . '` WHERE `InstanceID` = ' . $this->db->escape($Row['ID']));
			$Temp = '';

			if($this->db->num_rows($result2) > 0)
			{
				while($Row2 = $this->db->fetch_array($result2))
				{
					switch($Row2['Task'])
					{
						case TASK_INSTALL:
							$Temp.= $lng['aps']['task_install'] . '<br/>';
							break;
						case TASK_REMOVE:
							$Temp.= $lng['aps']['task_remove'] . '<br/>';
							break;
						case TASK_RECONFIGURE:
							$Temp.= $lng['aps']['task_reconfigure'] . '<br/>';
							break;
						case TASK_UPGRADE:
							$Temp.= $lng['aps']['task_upgrade'] . '<br/>';
							break;
						default:
							$Temp.= $lng['aps']['unknown_status'] . '<br/>';
							break;
					}
				}
			}
			else
			{
				$Temp.= $lng['aps']['no_task'];
			}

			$Fieldname = $lng['aps']['activetasks'];
			$Fieldvalue = $Temp;
			eval("\$Data.=\"" . getTemplate("aps/data") . "\";");

			//show entrypoints for application (important URLs within the application)

			if($Row['Status'] == INSTANCE_SUCCESS)
			{
				$Temp = '';

				//get domain to domain id

				$result3 = $this->db->query('SELECT * FROM `' . TABLE_APS_SETTINGS . '` WHERE `Name` = "main_domain" AND `InstanceID` = ' . $this->db->escape($Row['ID']));
				$Row3 = $this->db->fetch_array($result3);
				$result4 = $this->db->query('SELECT * FROM `' . TABLE_PANEL_DOMAINS . '` WHERE `customerid` = ' . $this->db->escape($CustomerId) . ' AND `id` = ' . $this->db->escape($Row3['Value']));
				$Row3 = $this->db->fetch_array($result4);
				$Domain = $Row3['domain'];

				//get sub location for domain

				$result5 = $this->db->query('SELECT * FROM `' . TABLE_APS_SETTINGS . '` WHERE `Name` = "main_location" AND `InstanceID` = ' . $this->db->escape($Row['ID']));
				$Row3 = $this->db->fetch_array($result5);
				$Location = $Row3['Value'];

				//show main site link

				if($Location == '')
				{
					$Temp.= '<a href="http://' . $Domain . '/" target="_blank">' . $lng['aps']['mainsite'] . '</a><br/>';
				}
				else
				{
					$Temp.= '<a href="http://' . $Domain . '/' . $Location . '/" target="_blank">' . $lng['aps']['mainsite'] . '</a><br/>';
				}

				//show other links from meta data

				if($Xml->{'entry-points'})
				{
					foreach($Xml->{'entry-points'}->entry as $Entry)
					{
						if($Location == '')
						{
							$Temp.= '<a href="http://' . $Domain . $Entry->path . '" target="_blank">' . $Entry->label . '</a><br/>';
						}
						else
						{
							$Temp.= '<a href="http://' . $Domain . '/' . $Location . $Entry->path . '" target="_blank">' . $Entry->label . '</a><br/>';
						}
					}
				}

				$Fieldname = $lng['aps']['applicationlinks'];
				$Fieldvalue = $Temp;
				eval("\$Data.=\"" . getTemplate("aps/data") . "\";");
			}

			eval("echo \"" . getTemplate("aps/package_status") . "\";");
			unset($Xml);
		}
	}

	/**
	 * function creates a new instance of a package based on the installer data
	 *
	 * @param	packageid	id of package from database
	 * @param	customerid	id of customer from database
	 * @return	success true/error false
	 */

	private function CreatePackageInstance($PackageId, $CustomerId)
	{
		global $lng;

		if(!self::IsValidPackageId($PackageId, true))return false;

		//has user pressed F5/reload?

		$result = $this->db->query('SELECT * FROM `' . TABLE_APS_TEMP_SETTINGS . '` WHERE `CustomerID` = ' . $this->db->escape($CustomerId));

		if($this->db->num_rows($result) == 0)
		{
			self::InfoBox($lng['aps']['erroronnewinstance']);
			return false;
		}

		//get path to package xml file

		$result = $this->db->query('SELECT * FROM `' . TABLE_APS_PACKAGES . '` WHERE `ID` = ' . $this->db->escape($PackageId));
		$Row = $this->db->fetch_array($result);
		$Xml = self::GetXmlFromFile('./packages/' . $Row['Path'] . '/APP-META.xml');

		//return if parse of xml file has failed

		if($Xml == false)return false;

		//add new instance

		$this->db->query('INSERT INTO `' . TABLE_APS_INSTANCES . '` (`CustomerID`, `PackageID`, `Status`) VALUES (' . $this->db->escape($CustomerId) . ', ' . $this->db->escape($PackageId) . ', ' . INSTANCE_INSTALL . ')');
		$result = $this->db->query('SELECT * FROM `' . TABLE_APS_INSTANCES . '` WHERE `CustomerID` = ' . $this->db->escape($CustomerId) . ' AND `PackageID` = ' . $this->db->escape($PackageId) . ' AND `Status` = ' . INSTANCE_INSTALL . ' ORDER BY ID DESC');
		$Row = $this->db->fetch_array($result);

		//copy & delete temporary data

		$this->db->query('INSERT INTO `' . TABLE_APS_SETTINGS . '` (`InstanceID`, `Name`, `Value`) SELECT ' . $this->db->escape($Row['ID']) . ' AS `InstanceID`, `Name`, `Value` FROM `' . TABLE_APS_TEMP_SETTINGS . '` WHERE `CustomerID` = ' . $this->db->escape($CustomerId) . ' AND `PackageID` = ' . $this->db->escape($PackageId));
		$this->db->query('DELETE FROM `' . TABLE_APS_TEMP_SETTINGS . '` WHERE `CustomerID` = ' . $this->db->escape($CustomerId) . ' AND `PackageID` = ' . $this->db->escape($PackageId));

		//add task for installation

		$this->db->query('INSERT INTO `' . TABLE_APS_TASKS . '` (`InstanceID`, `Task`) VALUES(' . $this->db->escape($Row['ID']) . ', ' . TASK_INSTALL . ')');

		//update used counter for packages

		$this->db->query('UPDATE `' . TABLE_PANEL_CUSTOMERS . '` SET `aps_packages_used` = `aps_packages_used` + 1 WHERE `customerid` = ' . (int)$CustomerId);
		self::InfoBox(sprintf($lng['aps']['successonnewinstance'], $Xml->name));
		unset($Xml);
	}

	/**
	 * convert human readable memory sizes into bytes
	 *
	 * @param	value		ini_get() formated memory size
	 * @return	memory size in bytes
	 */

	private function PhpMemorySizeToBytes($Value)
	{
		//convert memory formats from php.ini to a integer value in bytes

		$Value = trim($Value);
		$Last = strtolower($Value{strlen($Value) - 1});

		switch($Last)
		{
			case 'g':
				$Value*= 1024;
			case 'm':
				$Value*= 1024;
			case 'k':
				$Value*= 1024;
		}

		return $Value;
	}

	/**
	 * convert php.ini formated strings into true and false as a string
	 *
	 * @param	value		value to read from php.ini (format: safe_mode or safe-mode)
	 * @return	(true|false) as string
	 */

	private function TrueFalseIniGet($Value)
	{
		//convert php.ini values to true and false as string

		$Value = ini_get(str_replace(array('-'), array('_'), $Value));

		if($Value == 0
		   || $Value == false
		   || $Value == 'off')
		{
			return 'false';
		}
		else
		{
			return 'true';
		}
	}

	/**
	 * packages can fail during the validation process. this function allows to check for exceptions
	 *
	 * @param	category		category as string to check
	 * @param	item			item within category to check
	 * @return	success true (value has exception) / error false (value has no exception)
	 */

	private function CheckException($Category, $Item, $Value)
	{
		global $settings;

		//search for element within system settings

		$Elements = explode(',', $settings['aps'][$Category . '-' . $Item]);
		foreach($Elements as $Element)
		{
			if(strtolower($Element) == strtolower($Value))return true;
		}

		return false;
	}

	/**
	 * packages must be validated within the submappings of a filesystem structure
	 *
	 * @param	parentmapping	instance of parsed xml file, current mapping position
	 * @param	url				relative path for application specifying the current path within the mapping tree
	 * @return	array with errors found, optional empty when no errors were found
	 */

	private function CheckSubmappings($ParentMapping, $Url)
	{
		global $lng;
		$Error = array();

		//check for special PHP handler extensions

		$XmlPhpMapping = $ParentMapping->children('http://apstandard.com/ns/1/php');
		foreach($XmlPhpMapping->handler as $Handler)
		{
			if(isset($Handler->extension[0])
			   && strval($Handler->extension[0]) != 'php')
			{
				$Error[] = $lng['aps']['php_misc_handler'];
			}

			if(isset($Handler->disabled))
			{
				$Error[] = $lng['aps']['php_misc_directoryhandler'];
			}
		}

		//check for special ASP.NET url handler within mappings

		$XmlAspMapping = $ParentMapping->children('http://apstandard.com/ns/1/aspnet');

		if($XmlAspMapping->handler)
		{
			$Error[] = $lng['aps']['asp_net'];
		}

		//check for special CGI url handlers within mappings

		$XmlCgiMapping = $ParentMapping->children('http://apstandard.com/ns/1/cgi');

		if($XmlCgiMapping->handler)
		{
			$Error[] = $lng['aps']['cgi'];
		}

		//resolve deeper mappings

		foreach($ParentMapping->mapping as $Mapping)
		{
			$Return = array();

			//recursive check of other mappings

			if($Url == '/')
			{
				$Return = self::CheckSubmappings($Mapping, $Url . $Mapping['url']);
			}
			else
			{
				$Return = self::CheckSubmappings($Mapping, $Url . '/' . $Mapping['url']);
			}

			//if recursive checks found errors, attach them

			if(count($Return) != 0)
			{
				foreach($Return as $Value)
				{
					if(!in_array($Value, $Error))$Error[] = $Value;
				}
			}
		}

		return $Error;
	}

	/**
	 * function validates a package against a lot of options and installs it if all conditions have succeeded
	 *
	 * @param	filename		path to zipfile to install
	 */

	private function InstallNewPackage($Filename)
	{
		global $lng;

		if(file_exists($Filename)
		   && $Xml = self::GetXmlFromZip($Filename))
		{
			$Error = array();

			$this->aps_version = isset($Xml->attributes()->version) ? (string)$Xml->attributes()->version : '1.0';

			//check alot of stuff if package is supported
			//php modules

			if ($this->aps_version == '1.0')
			{
				// the good ole way
				$XmlPhp = $Xml->requirements->children('http://apstandard.com/ns/1/php');
			} 
			else 
			{
				// since 1.1
				$Xml->registerXPathNamespace('php', 'http://apstandard.com/ns/1/php');

				$XmlPhp = new DynamicProperties;
				$XmlPhp->extension = getXPathValue($Xml, '//php:extension', false);
				$XmlPhp->function = getXPathValue($Xml, '//php:function', false);
			}

			if($XmlPhp->extension)
			{
				$ExtensionsLoaded = get_loaded_extensions();
				foreach($XmlPhp->extension as $Extension)
				{
					if(strtolower($Extension) == 'php')
					{
						continue;
					}

					if(!in_array($Extension, $ExtensionsLoaded)
					   && !self::CheckException('php', 'extension', $Extension))
					{
						$Error[] = sprintf($lng['aps']['php_extension'], $Extension);
					}
				}
			}

			//php functions

			if($XmlPhp->function)
			{
				foreach($XmlPhp->function as $Function)
				{
					if(!function_exists($Function)
					   && !self::CheckException('php', 'function', $Function))
					{
						$Error[] = sprintf($lng['aps']['php_function'], $Function);
					}
				}
			}

			//php values

			$PhpValues = array(
				'short-open-tag',
				'file-uploads',
				'magic-quotes-gpc',
				'register-globals',
				'allow-url-fopen',
				'safe-mode'
			);
			foreach($PhpValues as $Value)
			{
				if ($this->aps_version != '1.0')
				{
					$XmlPhp->{$Value} = getXPathValue($Xml, '//php:'.$Value);
				}

				if($XmlPhp->{$Value})
				{
					if(self::TrueFalseIniGet($Value) != $XmlPhp->{$Value}
					   && !self::CheckException('php', 'configuration', str_replace(array('-'), array('_'), $Value)))
					{
						$Error[] = sprintf($lng['aps']['php_configuration'], str_replace(array('-'), array('_'), $Value));
					}
				}
			}

			if ($this->aps_version != '1.0')
			{
				$XmlPhp->{'post-max-size'} = getXPathValue($Xml, '//php:post-max-size');
			}

			if($XmlPhp->{'post-max-size'})
			{
				if(self::PhpMemorySizeToBytes(ini_get('post_max_size')) < intval($XmlPhp->{'post-max-size'})
				   && !self::CheckException('php', 'configuration', 'post_max_size'))
				{
					$Error[] = $lng['aps']['php_configuration_post_max_size'];
				}
			}

			if ($this->aps_version != '1.0')
			{
				$XmlPhp->{'memory-limit'} = getXPathValue($Xml, '//php:memory-limit');
			}

			if($XmlPhp->{'memory-limit'})
			{
				if(self::PhpMemorySizeToBytes(ini_get('memory_limit')) < intval($XmlPhp->{'memory-limit'})
				   && !self::CheckException('php', 'configuration', 'memory_limit'))
				{
					$Error[] = $lng['aps']['php_configuration_memory_limit'];
				}
			}

			if ($this->aps_version != '1.0')
			{
				$XmlPhp->{'max-execution-time'} = getXPathValue($Xml, '//php:max-execution-time');
			}

			if($XmlPhp->{'max-execution-time'})
			{
				if(ini_get('max_execution_time') < intval($XmlPhp->{'max-execution-time'})
				   && !self::CheckException('php', 'configuration', 'max_execution_time'))
				{
					$Error[] = $lng['aps']['php_configuration_max_execution_time'];
				}
			}

			//php version
			//must be done with xpath otherwise check not possible (XML parser problem with attributes)

			$Xml->registerXPathNamespace('phpversion', 'http://apstandard.com/ns/1/php');
			$Result = $Xml->xpath('//phpversion:version');

			if(isset($Result[0]['min']))
			{
				if(version_compare($Result[0]['min'], PHP_VERSION) == 1)
				{
					$Error[] = $lng['aps']['php_general_old'];
				}
			}

			if(isset($Result[0]['max-not-including']))
			{
				if(version_compare($Result[0]['max-not-including'], PHP_VERSION) == - 1)
				{
					$Error[] = $lng['aps']['php_general_new'];
				}
			}

			//database

			if ($this->aps_version == '1.0')
			{
				// the good ole way
				$XmlDb = $Xml->requirements->children('http://apstandard.com/ns/1/db');
			} 
			else 
			{
				// since 1.1
				$Xml->registerXPathNamespace('db', 'http://apstandard.com/ns/1/db');

				$XmlDb = new DynamicProperties;
				$XmlDb->db->id = getXPathValue($Xml, '//db:id');
				$XmlDb->db->{'server-type'} = getXPathValue($Xml, '//db:server-type');
				$XmlDb->db->{'server-min-version'} = getXPathValue($Xml, '//db:server-min-version');
			}

			if($XmlDb->db->id)
			{
				if($XmlDb->db->{'server-type'} != 'mysql')
				{
					$Error[] = $lng['aps']['db_mysql_support'];
				}

				if(version_compare($XmlDb->db->{'server-min-version'}, mysql_get_server_info()) == 1)
				{
					$Error[] = $lng['aps']['db_mysql_version'];
				}
			}

			//ASP.NET

			if ($this->aps_version == '1.0')
			{
				// the good ole way
				$XmlAsp = $Xml->requirements->children('http://apstandard.com/ns/1/aspnet');
			} 
			else 
			{
				// since 1.1
				$Xml->registerXPathNamespace('aspnet', 'http://apstandard.com/ns/1/aspnet');

				$XmlAsp = new DynamicProperties;
				$XmlAsp->handler = getXPathValue($Xml, '//aspnet:handler');
				$XmlAsp->permissions = getXPathValue($Xml, '//aspnet:permissions');
				$XmlAsp->version = getXPathValue($Xml, '//aspnet:version');
			}

			if($XmlAsp->handler
			   || $XmlAsp->permissions
			   || $XmlAsp->version)
			{
				$Error[] = $lng['aps']['asp_net'];
			}

			//CGI

			if ($this->aps_version == '1.0')
			{
				// the good ole way
				$XmlCgi = $Xml->requirements->children('http://apstandard.com/ns/1/cgi');
			} 
			else 
			{
				// since 1.1
				$Xml->registerXPathNamespace('cgi', 'http://apstandard.com/ns/1/cgi');

				$XmlCgi = new DynamicProperties;
				$XmlCgi->handler = getXPathValue($Xml, '//cgi:handler');
			}

			if($XmlCgi->handler)
			{
				$Error[] = $lng['aps']['cgi'];
			}

			//webserver modules

			if ($this->aps_version == '1.0')
			{
				// the good ole way
				$XmlWebserver = $Xml->requirements->children('http://apstandard.com/ns/1/apache');
			} 
			else
			{
				// since 1.1
				$Xml->registerXPathNamespace('apache', 'http://apstandard.com/ns/1/apache');

				$XmlWebserver = new DynamicProperties;
				$XmlWebserver->{'required-module'} = getXPathValue($Xml, '//apache:required-module');
				$XmlWebserver->htaccess = getXPathValue($Xml, '//apache:htaccess');
			}

			if($XmlWebserver->{'required-module'})
			{
				if(function_exists('apache_get_modules'))
				{
					$ModulesLoaded = apache_get_modules();
					foreach($XmlWebserver->{'required-module'} as $Module)
					{
						if(!in_array($Module, $ModulesLoaded)
						   && !self::CheckException('webserver', 'module', $Module))
						{
							$Error[] = sprintf($lng['aps']['webserver_module'], $Module);
						}
					}
				}
				else
				{
					if(!self::CheckException('webserver', 'module', 'fcgid-any'))$Error[] = $lng['aps']['webserver_fcgid'];
				}
			}

			//webserver .htaccess

			if($XmlWebserver->htaccess
			   && !self::CheckException('webserver', 'htaccess', 'htaccess'))
			{
				$Error[] = $lng['aps']['webserver_htaccess'];
			}

			//configuration script check

			if($Xml->{'configuration-script-language'}
			   && $Xml->{'configuration-script-language'} != 'php')
			{
				$Error[] = $lng['aps']['misc_configscript'];
			}

			//validation against a charset not possible in current version

			if ($this->aps_version == '1.0')
			{
				// the good ole way
				$aps_settings_array = $Xml->settings->group;
			} 
			else
			{
				// since 1.1
				$aps_settings_array = $Xml->{'global-settings'}->setting;
				if(!is_array($aps_settings_array)) {
					$aps_settings_array = $Xml->service->settings->group;
				}
			}
			
			foreach($aps_settings_array as $Group)
			{
				foreach($Group->setting as $Setting)
				{
					if($Setting['type'] == 'string'
					   || $Setting['type'] == 'password')
					{
						if(isset($Setting['charset']))
						{
							if(!in_array($lng['aps']['misc_charset'], $Error))$Error[] = $lng['aps']['misc_charset'];
						}
					}
				}
			}

			//check different errors/features in submappings

			if ($this->aps_version == '1.0')
			{			
				$Return = self::CheckSubmappings($Xml->mapping, $Xml->mapping['url']);

				if(count($Return) != 0)
				{
					foreach($Return as $Value)
					{
						if(!in_array($Value, $Error))$Error[] = $Value;
					}
				}
			}

			//check already installed versions

			$result = $this->db->query('SELECT * FROM `' . TABLE_APS_PACKAGES . '` WHERE `Name` = "' . $this->db->escape($Xml->name) . '"');
			$Newer = 0;

			if($this->db->num_rows($result) > 0)
			{
				while($Row = $this->db->fetch_array($result))
				{
					//package is newer, install package as a update

					if(version_compare($Row['Version'] . '-' . $Row['Release'], $Xml->version . '-' . $Xml->release) == - 1)
					{
						$Newer = 1;
					}

					//package is installed already with same version, cancel installation

					if(version_compare($Row['Version'] . '-' . $Row['Release'], $Xml->version . '-' . $Xml->release) == 0)
					{
						$Error[] = $lng['aps']['misc_version_already_installed'];
						break;
					}

					//package is older than the one which is installed already, cancel installation

					if(version_compare($Row['Version'] . '-' . $Row['Release'], $Xml->version . '-' . $Xml->release) == 1)
					{
						$Error[] = $lng['aps']['misc_only_newer_versions'];
						break;
					}
				}
			}

			if(count($Error) > 0)
			{
				//show errors

				$Output = '';
				foreach($Error as $Entry)
				{
					$Output.= '<li>' . $Entry . '</li>';
				}

				self::InfoBox(sprintf($lng['aps']['erroronscan'], $Xml->name, $Output));
				return false;
			}
			else
			{
				//install package in system, all checks succeeded

				$Destination = './packages/' . basename($Filename) . '/';

				//create package directory

				if(!file_exists($Destination))mkdir($Destination, 0777, true);

				//copy xml meta data

				self::GetContentFromZip($Filename, 'APP-META.xml', $Destination . 'APP-META.xml');

				//copy screenshots
				
				if ($this->aps_version != '1.0')
				{
					$xml_screenshots = $Xml->presentation->screenshot;;
				}
				else
				{
					$xml_screenshots = $Xml->screenshot;
				}
				

				if($xml_screenshots)
				{
					foreach($xml_screenshots as $Screenshot)
					{
						self::GetContentFromZip($Filename, $Screenshot['path'], $Destination . basename($Screenshot['path']));
					}
				}

				//copy icon
				
				if ($this->aps_version != '1.0')
				{
					$xml_iconpath = $Xml->presentation->icon['path'];
				}
				else
				{
					$xml_iconpath = $Xml->icon['path'];
				}

				if($xml_iconpath)
				{
					self::GetContentFromZip($Filename, $xml_iconpath, $Destination . basename($xml_iconpath));
				}

				//copy license
				
				if ($this->aps_version != '1.0')
				{
					$xml_license = $Xml->service->license;
				}
				else
				{
					$xml_license = $Xml->license;
				}				
				

				if($xml_license
				   && $xml_license->text->file)
				{
					self::GetContentFromZip($Filename, $xml_license->text->file, $Destination . 'license.txt');
				}

				//insert package to database

				$this->db->query('INSERT INTO `' . TABLE_APS_PACKAGES . '` (`Path`, `Name`, `Version`, `Release`, `Status`) VALUES ("' . $this->db->escape(basename($Filename)) . '", "' . $this->db->escape($Xml->name) . '", "' . $this->db->escape($Xml->version) . '", ' . $this->db->escape($Xml->release) . ', ' . PACKAGE_LOCKED . ')');

				//copy zipfile do destination

				copy($Filename, $Destination . basename($Filename));
				unlink($Filename);

				//show some feedback messages to admin

				if($Newer == 1)
				{
					self::InfoBox(sprintf($lng['aps']['successpackageupdate'], $Xml->name));
				}
				else
				{
					self::InfoBox(sprintf($lng['aps']['successpackageinstall'], $Xml->name));
				}

				unset($Xml);
				return true;
			}
		}
		else
		{
			//file cannot be unzipped or parse of xml data has failed

			self::InfoBox(sprintf($lng['aps']['invalidzipfile'], basename($Filename)));
			return false;
		}
	}

	/**
	 * main function of the class, provides all of the aps installer frontend
	 */

	public function MainHandler($Action)
	{
		global $lng, $filename, $s, $page, $action, $Id;

		//check for basic functions, classes and permissions

		$Error = '';

		if(!class_exists('SimpleXMLElement')
		   || !function_exists('zip_open'))
		{
			$Error.= '<li>' . $lng['aps']['class_zip_missing'] . '</li>';
		}

		if(!is_writable($this->RootDir.'temp/')
		   || !is_writable($this->RootDir.'packages/'))
		{
			$dirpermission = str_replace('{$path}', $this->RootDir, $lng['aps']['dir_permissions']);
			$Error.= '<li>' . $dirpermission . '</li>';
		}

		if($Error != '')
		{
			//show different error to customer and admin

			if(!isset($this->userinfo['customerid']))
			{
				self::InfoBox(sprintf($lng['aps']['initerror'], $Error));
			}
			else
			{
				self::InfoBox($lng['aps']['initerror_customer']);
			}

			return;
		}

		if(isset($this->userinfo['customerid']))
		{		
			$CustomerId = $this->userinfo['customerid'];
		}
		else
		{
			$CustomerId = -1;
		}
		$AdminId = $this->userinfo['adminid'];
		$PackagesPerSite = $this->settings['aps']['items_per_page'];

		//run different functions based on action

		if($Action == 'install')
		{
			//check for valid package id

			if(self::IsValidPackageId($Id, true))
			{
				//installation data is given

				if(isset($_POST['withinput']))
				{
					$Errors = self::ValidatePackageData($Id, $CustomerId);

					//if there are no input errors, create a new instance

					if(count($Errors) == 0)
					{
						self::CreatePackageInstance($Id, $CustomerId);
					}
					else
					{
						self::ShowPackageInstaller($Id, $Errors, $CustomerId);
					}
				}
				else
				{
					//empty array -> no errors will be shown to customer

					$Errors = array();
					self::ShowPackageInstaller($Id, $Errors, $CustomerId);
				}
			}
			else
			{
				self::InfoBox($lng['aps']['iderror']);
			}
		}
		elseif($Action == 'remove')
		{
			//check for valid instance id

			if(self::IsValidInstanceId($Id, $CustomerId))
			{
				//customer has clicked yes to uninstall a package

				if(isset($_POST['answer'])
				   && $_POST['answer'] == $lng['panel']['yes'])
				{
					//check if there is already an task

					$result = $this->db->query('SELECT * FROM `' . TABLE_APS_TASKS . '` WHERE `InstanceID` = ' . $this->db->escape($Id) . ' AND `Task` = ' . TASK_REMOVE);

					if($this->db->num_rows($result) > 0)
					{
						self::InfoBox($lng['aps']['removetaskexisting']);
					}
					else
					{
						//remove package, no task existing

						$this->db->query('INSERT INTO `' . TABLE_APS_TASKS . '` (`InstanceID`, `Task`) VALUES (' . (int)$Id . ', ' . TASK_REMOVE . ')');
						$this->db->query('UPDATE `' . TABLE_APS_INSTANCES . '` SET `Status` = ' . INSTANCE_UNINSTALL . ' WHERE `ID` = ' . (int)$Id);
						$this->db->query('UPDATE `' . TABLE_PANEL_CUSTOMERS . '` SET `aps_packages_used` = `aps_packages_used` - 1 WHERE `customerid` = ' . (int)$CustomerId);
						self::InfoBox($lng['aps']['packagewillberemoved']);
					}
				}
				else
				{
					//show yes/no question

					$Message = $lng['question']['reallywanttoremove'];
					$action_alt = 'customerstatus';
					$Ids = '<input type="hidden" name="id" value="' . (int)$Id . '"/>';
					eval("echo \"" . getTemplate("aps/askyesno") . "\";");
				}
			}
			else
			{
				self::InfoBox($lng['aps']['iderror']);
			}
		}
		elseif($Action == 'stopinstall')
		{
			//check for valid instance id

			if(self::IsValidInstanceId($Id, $CustomerId))
			{
				//check if application installation runs already

				$Result = $this->db->query('SELECT * FROM `' . TABLE_APS_INSTANCES . '` WHERE `ID` = ' . $this->db->escape($Id));
				$Row = $this->db->fetch_array($Result);

				if($Row['Status'] == INSTANCE_TASK_ACTIVE)
				{
					self::InfoBox($lng['aps']['installstoperror']);
				}
				else
				{
					if(isset($_POST['answer'])
					   && $_POST['answer'] == $lng['panel']['yes'])
					{
						//remove task

						$this->db->query('DELETE FROM `' . TABLE_APS_TASKS . '` WHERE `InstanceID` = ' . $this->db->escape($Id));

						//remove settings

						$this->db->query('DELETE FROM `' . TABLE_APS_SETTINGS . '` WHERE `InstanceID` = ' . $this->db->escape($Id));

						//remove instance

						$this->db->query('DELETE FROM `' . TABLE_APS_INSTANCES . '` WHERE `ID` = ' . $this->db->escape($Id));

						//update used counter

						$this->db->query('UPDATE `' . TABLE_PANEL_CUSTOMERS . '` SET `aps_packages_used` = `aps_packages_used` - 1 WHERE `customerid` = ' . (int)$CustomerId);
						self::InfoBox($lng['aps']['installstopped']);
					}
					else
					{
						//show yes/no question

						$Message = $lng['question']['reallywanttostop'];
						$action_alt = 'customerstatus';
						$Ids = '<input type="hidden" name="id" value="' . (int)$Id . '"/>';
						eval("echo \"" . getTemplate("aps/askyesno") . "\";");
					}
				}
			}
			else
			{
				self::InfoBox($lng['aps']['iderror']);
			}
		}
		elseif($Action == 'reconfigure')
		{
			//check for valid instance id

			if(self::IsValidInstanceId($Id, $CustomerId))
			{
				self::InfoBox('Reconfigure function not implemented in current version!');
			}
			else
			{
				self::InfoBox($lng['aps']['iderror']);
			}
		}
		elseif($Action == 'details')
		{
			//show advanced package infos if package id is valid

			if(self::IsValidPackageId($Id, true))
			{
				self::ShowPackageInfo($Id, true);
			}
			else
			{
				self::InfoBox($lng['aps']['iderror']);
			}
		}
		elseif($Action == 'scan'
		       && !isset($this->userinfo['customerid']))
		{
			//find all files in temp directory

			$Files = scandir('./temp/');
			$Counter = 0;
			foreach($Files as $File)
			{
				//skip invalid "files"

				if(substr($File, -4) != '.zip')continue;

				//install new package in system

				self::InstallNewPackage('./temp/' . $File);
				$Counter+= 1;
			}

			if($Counter == 0)
			{
				//throw error if no file was found

				self::InfoBox($lng['aps']['nopacketsforinstallation']);
			}
		}
		elseif($Action == 'manageinstances'
		       && !isset($this->userinfo['customerid']))
		{
			self::ManageInstances();
		}
		elseif($Action == 'managepackages'
		       && !isset($this->userinfo['customerid']))
		{
			self::ManagePackages();
		}
		elseif($Action == 'upload'
		       && !isset($this->userinfo['customerid']))
		{
			self::UploadNewPackages();
		}
		elseif($Action == 'customerstatus')
		{
			self::CustomerStatus($CustomerId);
		}
		elseif($Action == 'search')
		{
			self::SearchPackages();
		}
		elseif($Action == 'overview')
		{
			// show packages with paging

			if(isset($_GET['page'])
			   && preg_match('/^[0-9]+$/', $_GET['page']) != - 1)
			{
				//check if page parameter is valid
				//get all packages to find out how many pages are needed

				$result = $this->db->query('SELECT * FROM `' . TABLE_APS_PACKAGES . '` WHERE `Status` = ' . PACKAGE_ENABLED . ' ORDER BY `Name` ASC');
				$Pages = intval($this->db->num_rows($result) / $PackagesPerSite);

				if(($this->db->num_rows($result) / $PackagesPerSite) > $Pages)$Pages+= 1;

				if($_GET['page'] >= 1
				   && $_GET['page'] <= $Pages)
				{
					//page parameter is within available pages, now show packages for that given page

					$result2 = $this->db->query('SELECT * FROM `' . TABLE_APS_PACKAGES . '` WHERE `Status` = ' . PACKAGE_ENABLED . ' ORDER BY `Name` ASC LIMIT ' . $this->db->escape((intval($_GET['page']) - 1) * $PackagesPerSite) . ', ' . $this->db->escape($PackagesPerSite));

					//show packages

					while($Row3 = $this->db->fetch_array($result2))
					{
						self::ShowPackageInfo($Row3['ID']);
					}

					//show URLs for other pages

					if($Pages > 1)
					{
						echo ('<div style="width: 90%; text-align: center;"><br/>');
						for ($i = 1;$i < $Pages + 1;$i++)
						{
							if($i == $_GET['page'])
							{
								echo ('<span class="pageitem">' . $i . '</span>');
							}
							else
							{
								echo ('<span class="pageitem"><a href="' . $filename . '?s=' . $s . '&amp;action=overview&amp;page=' . $i . '">' . $i . '</a></span>');
							}
						}

						echo ('</div><br/><br/>');
					}
				}
				else
				{
					//page parameter isnt within available pages, show packages from first page

					$result2 = $this->db->query('SELECT * FROM `' . TABLE_APS_PACKAGES . '` WHERE `Status` = ' . PACKAGE_ENABLED . ' ORDER BY `Name` ASC LIMIT 0, ' . $this->db->escape($PackagesPerSite));

					//show packages

					while($Row3 = $this->db->fetch_array($result2))
					{
						self::ShowPackageInfo($Row3['ID']);
					}

					//fetch number of packages to calculate the number of pages

					$result3 = $this->db->query('SELECT * FROM `' . TABLE_APS_PACKAGES . '` WHERE `Status` = ' . PACKAGE_ENABLED . ' ORDER BY `Name` ASC');
					$Pages = intval($this->db->num_rows($result3) / $PackagesPerSite);

					if(($this->db->num_rows($result3) / $PackagesPerSite) > $Pages)$Pages+= 1;

					//show URLs for other pages

					if($Pages > 1)
					{
						echo ('<div style="width: 90%; text-align: center;"><br/>');
						for ($i = 1;$i < $Pages + 1;$i++)
						{
							echo ('<span class="pageitem"><a href="' . $filename . '?s=' . $s . '&amp;action=overview&amp;page=' . $i . '">' . $i . '</a></span>');
						}

						echo ('</div>');
					}
				}
			}
			else
			{
				//page parameter isnt valid, show packages from first page

				$result2 = $this->db->query('SELECT * FROM `' . TABLE_APS_PACKAGES . '` WHERE `Status` = ' . PACKAGE_ENABLED . ' ORDER BY `Name` ASC LIMIT 0, ' . $this->db->escape($PackagesPerSite));

				if($this->db->num_rows($result2) == 0)
				{
					self::InfoBox($lng['aps']['nopackagestoinstall']);
					return;
				}

				//show packages

				while($Row3 = $this->db->fetch_array($result2))
				{
					self::ShowPackageInfo($Row3['ID']);
				}

				//fetch number of packages to calculate number of pages

				$result3 = $this->db->query('SELECT * FROM `' . TABLE_APS_PACKAGES . '` WHERE `Status` = ' . PACKAGE_ENABLED . ' ORDER BY `Name` ASC');
				$Pages = intval($this->db->num_rows($result3) / $PackagesPerSite);

				if(($this->db->num_rows($result3) / $PackagesPerSite) > $Pages)$Pages+= 1;

				//show URLs for other pages

				if($Pages > 1)
				{
					echo ('<div style="width: 90%; text-align: center;"><br/>');
					for ($i = 1;$i < $Pages + 1;$i++)
					{
						if($i == 1)
						{
							echo ('<span class="pageitem">' . $i . '</span>');
						}
						else
						{
							echo ('<span class="pageitem"><a href="' . $filename . '?s=' . $s . '&amp;action=overview&amp;page=' . $i . '">' . $i . '</a></span>');
						}
					}

					echo ('</div><br/><br/>');
				}
			}
		}
	}

	/**
	 * function extracts resources from a zipfile to return or save them on disk
	 *
	 * @param	filename		zipfile to read data from
	 * @param	file			file within zip archive to read
	 * @param	destination		optional parameter where to save file from within the zip file
	 * @return	success content of file from zip archive / error false
	 */

	private function GetContentFromZip($Filename, $File, $Destination = '')
	{
		if(!file_exists($Filename))return false;
		$Content = '';

		//now using the new ZipArchive class from php 5.2

		$Zip = new ZipArchive;
		$Resource = $Zip->open(realpath($Filename));

		if($Resource === true)
		{
			$FileHandle = $Zip->getStream($File);

			if(!$FileHandle)return false;

			while(!feof($FileHandle))
			{
				$Content.= fread($FileHandle, 8192);
			}

			fclose($FileHandle);
			$Zip->close();
		}
		else
		{
			//on 64 bit systems the zip functions can fail -> use safe_exec to extract the files

			$ReturnLines = array();
			$ReturnVal = - 1;
			$ReturnLines = safe_exec('unzip -o -j -qq ' . escapeshellarg(realpath($Filename)) . ' ' . escapeshellarg($File) . ' -d ' . escapeshellarg(sys_get_temp_dir() . '/'), $ReturnVal);

			if($ReturnVal == 0)
			{
				$Content = file_get_contents(sys_get_temp_dir() . '/' . basename($File));
				unlink(sys_get_temp_dir() . '/' . basename($File));

				if($Content == false)return false;
			}
			else
			{
				return false;
			}
		}

		//return content of file from within the zipfile or save to disk

		if($Content == '')
		{
			return false;
		}
		else
		{
			if($Destination == '')
			{
				return $Content;
			}
			else
			{
				//open file and save content

				$File = fopen($Destination, "wb");

				if($File)
				{
					fwrite($File, $Content);
					fclose($File);
				}
				else
				{
					return false;
				}
			}
		}
	}

	/**
	 * fetches the xml metafile from a zipfile and returns the parsed data
	 *
	 * @param	filename		zipfile containing the xml meta data
	 * @return	success parsed xml content of zipfile / error false
	 */

	private function GetXmlFromZip($Filename)
	{
		if(!file_exists($Filename))return false;

		//get content for xml meta data file from within the zipfile

		if($XmlContent = self::GetContentFromZip($Filename, 'APP-META.xml'))
		{
			//parse xml content

			$Xml = new SimpleXMLElement($XmlContent);
			return $Xml;
		}
		else
		{
			return false;
		}
	}

	/**
	 * reads the content of a xml metafile from disk and returns the parsed data
	 *
	 * @param	filename		xmlfile to parse
	 * @return	success parsed xml content of file / error false
	 */

	private function GetXmlFromFile($Filename)
	{
		//read xml file from disk and return parsed data

		if(!file_exists($Filename))return false;
		$XmlContent = file_get_contents($Filename);
		$Xml = new SimpleXMLElement($XmlContent);
		return $Xml;
	}

	/**
	 * check whether a given package id is valid
	 *
	 * @param	packageid		id of package from database to check vor validity
	 * @param	customer		check if package can be used by customer and/or admin [true|false]
	 * @return	success valid package id (id > 0 based on database layout) / error false
	 */

	private function IsValidPackageId($PackageId, $Customer)
	{
		if(preg_match('/^[0-9]+$/', $PackageId) != 1)return false;

		if($Customer == true)
		{
			//customers can only see packages which are enabled

			$result = $this->db->query('SELECT * FROM `' . TABLE_APS_PACKAGES . '` WHERE `Status` = ' . PACKAGE_ENABLED . ' AND `ID` = ' . $this->db->escape($PackageId));

			if($this->db->num_rows($result) > 0)
			{
				return $PackageId;
			}
			else
			{
				return false;
			}
		}
		else
		{
			//admins can see all packages

			$result = $this->db->query('SELECT * FROM `' . TABLE_APS_PACKAGES . '` WHERE `ID` = ' . $this->db->escape($PackageId));

			if($this->db->num_rows($result) > 0)
			{
				return $PackageId;
			}
			else
			{
				return false;
			}
		}
	}

	/**
	 * check whether a given instance id is valid
	 *
	 * @param	packageid		id of instance from database to check vor validity
	 * @return	success valid instance id (id > 0 based on database layout) / error false
	 */

	private function IsValidInstanceId($InstanceId, $CustomerId)
	{
		if(preg_match('/^[0-9]+$/', $InstanceId) != 1)return false;
		$result = $this->db->query('SELECT * FROM `' . TABLE_APS_INSTANCES . '` WHERE `CustomerID` = ' . $this->db->escape($CustomerId) . ' AND `ID` = ' . $this->db->escape($InstanceId));

		if($this->db->num_rows($result) > 0)
		{
			return $InstanceId;
		}
		else
		{
			return false;
		}
	}

	/**
	 * save installation values fetched from the installation wizard
	 *
	 * @param	packageid		id of package from database
	 * @param	customerid		id of customer for who the values should be saved
	 * @param	name			name of field to save
	 * @param	value			value to save for previously given name
	 */

	private function SetInstallationValue($PackageId, $CustomerId, $Name, $Value)
	{
		$result = $this->db->query('SELECT * FROM `' . TABLE_APS_TEMP_SETTINGS . '` WHERE `PackageID` = ' . $this->db->escape($PackageId) . ' AND `CustomerID` = ' . $this->db->escape($CustomerId) . ' AND `Name` = "' . $this->db->escape($Name) . '"');

		if($this->db->num_rows($result) == 0)
		{
			$this->db->query('INSERT INTO `' . TABLE_APS_TEMP_SETTINGS . '` (`PackageID`, `CustomerID`, `Name`, `Value`) VALUES (' . $this->db->escape($PackageId) . ', ' . $this->db->escape($CustomerId) . ', "' . $this->db->escape($Name) . '", "' . $this->db->escape($Value) . '")');
		}
		else
		{
			$Row = $this->db->fetch_array($result);
			$this->db->query('UPDATE `' . TABLE_APS_TEMP_SETTINGS . '` SET `PackageID` = ' . $this->db->escape($PackageId) . ', `CustomerID` = ' . $this->db->escape($CustomerId) . ', `Name` = "' . $this->db->escape($Name) . '", `Value` ="' . $this->db->escape($Value) . '" WHERE `ID` = ' . $this->db->escape($Row['ID']));
		}
	}

	/**
	 * return previously saved installation values
	 *
	 * @param	packageid		id of package from database
	 * @param	customerid		id of customer for who the values should be read
	 * @param	name			name of field to read
	 * @return	success value of field from database / error false
	 */

	private function GetInstallationValue($PackageId, $CustomerId, $Name)
	{
		$result = $this->db->query('SELECT * FROM `' . TABLE_APS_TEMP_SETTINGS . '` WHERE `PackageID` = ' . $this->db->escape($PackageId) . ' AND `CustomerID` = ' . $this->db->escape($CustomerId) . ' AND `Name` = "' . $this->db->escape($Name) . '"');

		if($this->db->num_rows($result) == 0)
		{
			return false;
		}
		else
		{
			$Row = $this->db->fetch_array($result);
			return $Row['Value'];
		}
	}

	/**
	 * fix a path given by the customer
	 *
	 * @param	path		path which could be compromised
	 * @return	corrected path
	 */

	private function MakeSecurePath($path)
	{
		//code based on syscp core code

		$search = Array(
			'#/+#',
			'#\.+#',
			'#\0+#',
			'#\\\\+#'
		);
		$replace = Array(
			'/',
			'',
			'',
			'/'
		);
		$path = preg_replace($search, $replace, $path);

		//no / at the end

		if(substr($path, strlen($path) - 1, 1) == '/')$path = substr($path, 0, strlen($path) - 1);

		//no / at beginning

		if(substr($path, 0, 1) == '/')$path = substr($path, 1);
		return $path;
	}

	/**
	 * validate the input of a customer against the xml meta descriptions
	 *
	 * @param	packageid		id of package from database
	 * @param	customerid		id of customer from database
	 * @return	success/error array of errors found containing fields that were wrong
	 */

	private function ValidatePackageData($PackageId, $CustomerId)
	{
		if(!self::IsValidPackageId($PackageId, true))return false;
		$result = $this->db->query('SELECT * FROM `' . TABLE_APS_PACKAGES . '` WHERE `ID` = ' . $this->db->escape($PackageId));
		$Row = $this->db->fetch_array($result);
		$Xml = self::GetXmlFromFile('./packages/' . $Row['Path'] . '/APP-META.xml');

		//return if parse of xml file has failed

		if($Xml == false)return false;

		$this->aps_version = isset($Xml->attributes()->version) ? (string)$Xml->attributes()->version : '1.0';		

		//check all data fields of xml file against inut of customer

		if ($this->aps_version == '1.0')
		{
			// the good ole way
			$aps_settings_array = $Xml->settings->group;
		} 
		else
		{
			// since 1.1
			$aps_settings_array = $Xml->{'global-settings'}->setting;
			if(!is_array($aps_settings_array)) {
				$aps_settings_array = $Xml->service->settings->group;
			}			
		}
		
		$Error = array();
		foreach($aps_settings_array as $Group)
		{
			foreach($Group->setting as $Setting)
			{
				$FieldId = strval($Setting['id']);

				if($Setting['type'] == 'string'
				   || $Setting['type'] == 'password')
				{
					if(isset($_POST[$FieldId]))
					{
						if(isset($Setting['min-length'])
						   && strlen($_POST[$FieldId]) < $Setting['min-length'])
						{
							if(!in_array($FieldId, $Error))$Error[] = $FieldId;
						}

						if(isset($Setting['max-length'])
						   && strlen($_POST[$FieldId]) > $Setting['max-length'])
						{
							if(!in_array($FieldId, $Error))$Error[] = $FieldId;
						}

						if(isset($Setting['regex'])
						   && !preg_match("/" . $Setting['regex'] . "/", $_POST[$FieldId]))
						{
							if(!in_array($FieldId, $Error))$Error[] = $FieldId;
						}

						/*
						elseif(isset($Setting['charset']))
						{
							//CHARSET VALIDATION FOR LATER VERSIONS
						}
						*/

						if(!in_array($FieldId, $Error))self::SetInstallationValue($PackageId, $CustomerId, $FieldId, $_POST[$FieldId]);
					}
					else
					{
						if(!in_array($FieldId, $Error))$Error[] = $FieldId;
					}
				}
				else

				if($Setting['type'] == 'email')
				{
					if(isset($_POST[$FieldId]))
					{
						$email = strtolower($_POST[$FieldId]);
						if(filter_var($email, FILTER_VALIDATE_EMAIL) === false)
						{
							if(!in_array($FieldId, $Error))$Error[] = $FieldId;
						}

						if(!in_array($FieldId, $Error))self::SetInstallationValue($PackageId, $CustomerId, $FieldId, $_POST[$FieldId]);
					}
					else
					{
						if(!in_array($FieldId, $Error))$Error[] = $FieldId;
					}
				}
				elseif($Setting['type'] == 'domain-name')
				{
					if(isset($_POST[$FieldId]))
					{
						if(!preg_match("^(http|https)\://([a-zA-Z0-9\.\-]+(\:[a-zA-Z0-9\.&%\$\-]+)*@)*((25[0-5]|2[0-4][0-9]|[0-1]{1}[0-9]{2}|[1-9]{1}[0-9]{1}|[1-9])\.(25[0-5]|2[0-4][0-9]|[0-1]{1}[0-9]{2}|[1-9]{1}[0-9]{1}|[1-9]|0)\.(25[0-5]|2[0-4][0-9]|[0-1]{1}[0-9]{2}|[1-9]{1}[0-9]{1}|[1-9]|0)\.(25[0-5]|2[0-4][0-9]|[0-1]{1}[0-9]{2}|[1-9]{1}[0-9]{1}|[0-9])|localhost|([a-zA-Z0-9\-]+\.)*[a-zA-Z0-9\-]+\.(com|edu|gov|int|mil|net|org|biz|arpa|info|name|pro|aero|coop|museum|[a-zA-Z]{2}))(\:[0-9]+)*(/($|[a-zA-Z0-9\.\,\?\'\\\+&%\$#\=~_\-]+))*$", $_POST[$FieldId]))
						{
							if(!in_array($FieldId, $Error))$Error[] = $FieldId;
						}

						if(!in_array($FieldId, $Error))self::SetInstallationValue($PackageId, $CustomerId, $FieldId, $_POST[$FieldId]);
					}
					else
					{
						if(!in_array($FieldId, $Error))$Error[] = $FieldId;
					}
				}
				elseif($Setting['type'] == 'integer')
				{
					if(isset($_POST[$FieldId]))
					{
						//check if number is in the format of float

						if(round($_POST[$FieldId]) != $_POST[$FieldId])
						{
							if(!in_array($FieldId, $Error))$Error[] = $FieldId;
						}

						if(!is_numeric($_POST[$FieldId]))
						{
							if(!in_array($FieldId, $Error))$Error[] = $FieldId;
						}

						if(isset($Setting['min'])
						   && intval($_POST[$FieldId]) < intval($Setting['min']))
						{
							if(!in_array($FieldId, $Error))$Error[] = $FieldId;
						}

						if(isset($Setting['max'])
						   && intval($_POST[$FieldId]) > intval($Setting['max']))
						{
							if(!in_array($FieldId, $Error))$Error[] = $FieldId;
						}

						if(!in_array($FieldId, $Error))self::SetInstallationValue($PackageId, $CustomerId, $FieldId, intval($_POST[$FieldId]));
					}
					else
					{
						if(!in_array($FieldId, $Error))$Error[] = $FieldId;
					}
				}
				elseif($Setting['type'] == 'float')
				{
					if(isset($_POST[$FieldId]))
					{
						if(!is_numeric($_POST[$FieldId]))
						{
							if(!in_array($FieldId, $Error))$Error[] = $FieldId;
						}

						if(isset($Setting['min'])
						   && floatval($_POST[$FieldId]) < floatval($Setting['min']))
						{
							if(!in_array($FieldId, $Error))$Error[] = $FieldId;
						}

						if(isset($Setting['max'])
						   && floatval($_POST[$FieldId]) > floatval($Setting['max']))
						{
							if(!in_array($FieldId, $Error))$Error[] = $FieldId;
						}

						if(!in_array($FieldId, $Error))self::SetInstallationValue($PackageId, $CustomerId, $FieldId, floatval($_POST[$FieldId]));
					}
					else
					{
						if(!in_array($FieldId, $Error))$Error[] = $FieldId;
					}
				}
				elseif($Setting['type'] == 'boolean')
				{
					if(isset($_POST[$FieldId])
					   && $_POST[$FieldId] == 'true')
					{
						self::SetInstallationValue($PackageId, $CustomerId, $FieldId, 'true');
					}
					else
					{
						self::SetInstallationValue($PackageId, $CustomerId, $FieldId, 'false');
					}
				}
				elseif($Setting['type'] == 'enum')
				{
					if(isset($_POST[$FieldId]))
					{
						foreach($Setting->choice as $Choice)
						{
							if($Choice['id'] == $_POST[$FieldId])
							{
								self::SetInstallationValue($PackageId, $CustomerId, $FieldId, $_POST[$FieldId]);
								break;
							}
						}
					}
					else
					{
						if(!in_array($FieldId, $Error))$Error[] = $FieldId;
					}
				}
			}
		}

		//database required?

		if ($this->aps_version == '1.0')
		{
			// the good ole way
			$XmlDb = $Xml->requirements->children('http://apstandard.com/ns/1/db');
		} 
		else 
		{
			// since 1.1
			$Xml->registerXPathNamespace('db', 'http://apstandard.com/ns/1/db');

			$XmlDb = new DynamicProperties;
			$XmlDb->db->id = getXPathValue($Xml, '//db:id');
		}

		if($XmlDb->db->id)
		{
			if(isset($_POST['main_database_password']))
			{
				if(strlen($_POST['main_database_password']) < 8)
				{
					if(!in_array('main_database_password', $Error))$Error[] = 'main_database_password';
				}

				if(!in_array('main_database_password', $Error))self::SetInstallationValue($PackageId, $CustomerId, 'main_database_password', $_POST['main_database_password']);
			}
			else
			{
				if(!in_array('main_database_password', $Error))$Error[] = 'main_database_password';
			}
		}

		//application location

		if(isset($_POST['main_domain']))
		{
			$result2 = $this->db->query('SELECT * FROM `' . TABLE_PANEL_DOMAINS . '` WHERE `customerid` = ' . $this->db->escape($CustomerId) . ' AND `id` = ' . $this->db->escape($_POST['main_domain']));

			if($this->db->num_rows($result2) > 0)
			{
				self::SetInstallationValue($PackageId, $CustomerId, 'main_domain', $_POST['main_domain']);
			}
			else
			{
				self::SetInstallationValue($PackageId, $CustomerId, 'main_domain', '-1');

				if(!in_array('main_domain', $Error))$Error[] = 'main_domain';
			}
		}
		else
		{
			self::SetInstallationValue($PackageId, $CustomerId, 'main_domain', '-1');

			if(!in_array('main_domain', $Error))$Error[] = 'main_domain';
		}

		if(isset($_POST['main_location']))
		{
			$Temp = $_POST['main_location'];

			//call function twice for security reasons!

			$Temp = self::MakeSecurePath($Temp);
			$Temp = self::MakeSecurePath($Temp);

			//previous instance check

			$InstallPath = '';

			//find real path for selected domain

			$result3 = $this->db->query('SELECT * FROM `' . TABLE_PANEL_DOMAINS . '` WHERE `customerid` = ' . $this->db->escape($CustomerId) . ' AND `id` = ' . $this->db->escape(self::GetInstallationValue($PackageId, $CustomerId, 'main_domain')));

			if($this->db->num_rows($result3) > 0)
			{
				//build real path

				$Row = $this->db->fetch_array($result3);
				$InstallPath = $Row['documentroot'];
				$InstallPath.= $Temp;
				$result4 = $this->db->query('SELECT * FROM `' . TABLE_APS_INSTANCES . '` WHERE `CustomerID` = ' . $this->db->escape($CustomerId));

				//get all instances from current customer
				//thats needed because there cannot be installed two apps within the same directory

				while($Row3 = $this->db->fetch_array($result4))
				{
					//get all domains linked to instances

					$result5 = $this->db->query('SELECT * FROM `' . TABLE_APS_SETTINGS . '` WHERE `InstanceID` = ' . $this->db->escape($Row3['ID']) . ' AND `Name` = "main_domain"');

					if($this->db->num_rows($result5) > 0)
					{
						$Row2 = $this->db->fetch_array($result5);
						$Reserved = '';

						//get real domain path

						$result6 = $this->db->query('SELECT * FROM `' . TABLE_PANEL_DOMAINS . '` WHERE `customerid` = ' . $this->db->escape($CustomerId) . ' AND `id` = ' . $this->db->escape($Row2['Value']));

						if($this->db->num_rows($result6) > 0)
						{
							$Row = $this->db->fetch_array($result6);
							$Reserved = $Row['documentroot'];
						}

						//get location under domain

						$result7 = $this->db->query('SELECT * FROM `' . TABLE_APS_SETTINGS . '` WHERE `InstanceID` = ' . $this->db->escape($Row3['ID']) . ' AND `Name` = "main_location"');

						if($this->db->num_rows($result7) > 0)
						{
							$Row = $this->db->fetch_array($result7);
							$Reserved.= $Row['Value'];
						}

						//check whether there is another app installed already

						if($Reserved == $InstallPath)
						{
							if(!in_array('main_location', $Error))$Error[] = 'main_location';
							break;
						}
					}
				}
			}

			if(!in_array('main_location', $Error))self::SetInstallationValue($PackageId, $CustomerId, 'main_location', $Temp);
		}
		else
		{
			if(!in_array('main_location', $Error))$Error[] = 'main_location';
			self::SetInstallationValue($PackageId, $CustomerId, 'main_location', '');
		}

		if ($this->aps_version != '1.0')
		{
			$xml_license = $Xml->service->license;
		}
		else
		{
			$xml_license = $Xml->license;
		}
		
		if($xml_license)
		{
			if($xml_license['must-accept']
			   && $xml_license['must-accept'] == 'true')
			{
				if(isset($_POST['license'])
				   && $_POST['license'] == 'true')
				{
					self::SetInstallationValue($PackageId, $CustomerId, 'license', 'true');
				}
				else
				{
					self::SetInstallationValue($PackageId, $CustomerId, 'license', 'false');

					if(!in_array('license', $Error))$Error[] = 'license';
				}
			}
		}

		unset($Xml);
		return $Error;
	}

	/**
	 * functions provides the frontend of the installation wizard for the customer
	 *
	 * @param	packageid		id of package from database
	 * @param	wrongdata		array of fields that were wrong in previous validation check
	 * @return	error false / success none
	 */

	private function ShowPackageInstaller($PackageId, $WrongData, $CustomerId)
	{
		global $lng, $filename, $s, $page, $action;
		$Data = '';
		$Fieldname = '';
		$Fieldvalue = '';
		$Groupname = '';

		if(!self::IsValidPackageId($PackageId, true))return false;
		$result = $this->db->query('SELECT * FROM `' . TABLE_APS_PACKAGES . '` WHERE `ID` = ' . $this->db->escape($PackageId));
		$Row = $this->db->fetch_array($result);
		$Xml = self::GetXmlFromFile('./packages/' . $Row['Path'] . '/APP-META.xml');

		//return if parse of xml file has failed

		if($Xml == false)return false;

		$this->aps_version = isset($Xml->attributes()->version) ? (string)$Xml->attributes()->version : '1.0';
		
		//show notifcation if customer has reached his installation limit

		if($this->userinfo['aps_packages'] != '-1'
		   && (int)$this->userinfo['aps_packages_used'] >= (int)$this->userinfo['aps_packages'])
		{
			self::InfoBox($lng['aps']['allpackagesused']);
			return false;
		}

		//icon for package

		$Icon = './images/default.png';
		
		if($this->aps_version != '1.0')
		{
			$iconpath = $Xml->presentation->icon['path'];		
		} 
		else
		{
			$iconpath = $Xml->icon['path'];
		}

		if($iconpath)
		{
			$Icon = './packages/' . $Row['Path'] . '/' . basename($iconpath);
		}

		//show error message if some input was wrong

		$ErrorMessage = 0;

		if(count($WrongData) != 0)
		{
			$ErrorMessage = 1;
		}

		//remove previously entered values if new installation has been triggered

		if(!isset($_POST['withinput']))
		{
			$this->db->query('DELETE FROM `' . TABLE_APS_TEMP_SETTINGS . '` WHERE `CustomerID` = ' . $this->db->escape($CustomerId) . ' AND `PackageID` = ' . $this->db->escape($PackageId));
		}

		//where to install app?

		$Temp = 'http://<select size="1" name="main_domain">';
		$Value = self::GetInstallationValue($PackageId, $CustomerId, 'main_domain');
		$result2 = $this->db->query('SELECT * FROM `' . TABLE_PANEL_DOMAINS . '` WHERE `customerid` = ' . $this->db->escape($CustomerId));

		//if customer has no domains, app cannot be installed
		//FIXME function for html code

		if($this->db->num_rows($result2) > 0)
		{
			while($Row3 = $this->db->fetch_array($result2))
			{
				if($Value)
				{
					if($Row3['id'] == $Value)
					{
						$Temp.= '<option selected="selected" value="' . $Row3['id'] . '">' . $Row3['domain'] . '</option>';
					}
					else
					{
						$Temp.= '<option value="' . $Row3['id'] . '">' . $Row3['domain'] . '</option>';
					}
				}
				else
				{
					$Temp.= '<option value="' . $Row3['id'] . '">' . $Row3['domain'] . '</option>';
				}
			}
		}
		else
		{
			$Temp.= '<option value="-1">' . $lng['aps']['no_domains'] . '</option>';
		}

		$Temp.= '</select>';
		$Value = self::GetInstallationValue($PackageId, $CustomerId, 'main_location');

		if($Value)
		{
			$Temp.= '/<input type="text" name="main_location" value="' . $Value . '"/>';
		}
		else
		{
			$Temp.= '/<input type="text" name="main_location" value=""/>';
		}

		if(in_array('main_domain', $WrongData))
		{
			$Temp.= self::FieldError($lng['aps']['nodomains']);
		}

		if(in_array('main_location', $WrongData))
		{
			$Temp.= self::FieldError($lng['aps']['wrongpath']);
		}

		if(!in_array('main_location', $WrongData)
		   && !in_array('main_domain', $WrongData))$Temp.= '<br/>';
		$Temp.= '<em>' . $lng['aps']['application_location_description'] . '</em>';
		$Groupname = $lng['aps']['basic_settings'];
		$Fieldname = $lng['aps']['application_location'];
		$Fieldvalue = $Temp;
		eval("\$Data.=\"" . getTemplate("aps/data") . "\";");

		//database required?

		if ($this->aps_version == '1.0')
		{
			// the good ole way
			$XmlDb = $Xml->requirements->children('http://apstandard.com/ns/1/db');
		} 
		else 
		{
			// since 1.1
			$Xml->registerXPathNamespace('db', 'http://apstandard.com/ns/1/db');

			$XmlDb = new DynamicProperties;
			$XmlDb->db->id = getXPathValue($Xml, '//db:id');
		}

		if($XmlDb->db->id)
		{
			$Temp = '<input type="password" name="main_database_password" />';

			if(in_array('main_database_password', $WrongData))
			{
				$Temp.= self::FieldError($lng['aps']['dbpassword']);
			}

			if(!in_array('main_database_password', $WrongData))$Temp.= '<br/>';
			$Temp.= '<em>' . $lng['aps']['database_password_description'] . '</em>';
			$Groupname = '';
			$Fieldname = $lng['aps']['database_password'];
			$Fieldvalue = $Temp;
			eval("\$Data.=\"" . getTemplate("aps/data") . "\";");
		}
		
		if ($this->aps_version == '1.0')
		{
			// the good ole way
			$aps_settings_array = $Xml->settings->group;
		} 
		else
		{
			// since 1.1
			$aps_settings_array = $Xml->{'global-settings'}->setting;
			if(!is_array($aps_settings_array)) {
				$aps_settings_array = $Xml->service->settings->group;
			}
		}		

		foreach($aps_settings_array as $Group)
		{
			$GroupPrinted = false;
			foreach($Group->setting as $Setting)
			{
				$Temp = '';

				if($Setting['type'] == 'string'
				   || $Setting['type'] == 'email'
				   || $Setting['type'] == 'integer'
				   || $Setting['type'] == 'float'
				   || $Setting['type'] == 'domain-name')
				{
					if(!$GroupPrinted)
					{
						$Groupname = $Group->name;
						$GroupPrinted = true;
					}
					else
					{
						$Groupname = '';
					}

					$Value = self::GetInstallationValue($PackageId, $CustomerId, strval($Setting['id']));

					if($Value)
					{
						$Temp.= '<input type="text" name="' . $Setting['id'] . '" value="' . $Value . '"/>';
					}
					elseif($Setting['default-value'])
					{
						$Temp.= '<input type="text" name="' . $Setting['id'] . '" value="' . $Setting['default-value'] . '"/>';
					}
					else
					{
						$Temp.= '<input type="text" name="' . $Setting['id'] . '" />';
					}

					if(in_array($Setting['id'], $WrongData))
					{
						if($Setting->{'error-message'})
						{
							$Temp.= self::FieldError($Setting->{'error-message'});
						}
						else
						{
							if($Setting['type'] == 'string')
							{
								$Temp.= self::FieldError($lng['aps']['error_text']);
							}
							elseif($Setting['type'] == 'email')
							{
								$Temp.= self::FieldError($lng['aps']['error_email']);
							}
							elseif($Setting['type'] == 'domain-name')
							{
								$Temp.= self::FieldError($lng['aps']['domain']);
							}
							elseif($Setting['type'] == 'integer')
							{
								$Temp.= self::FieldError($lng['aps']['error_integer']);
							}
							elseif($Setting['type'] == 'float')
							{
								$Temp.= self::FieldError($lng['aps']['error_float']);
							}
						}
					}
				}
				elseif($Setting['type'] == 'password')
				{
					if(!$GroupPrinted)
					{
						$Groupname = $Group->name;
						$GroupPrinted = true;
					}
					else
					{
						$Groupname = '';
					}

					$Temp.= '<input type="password" name="' . $Setting['id'] . '" />';

					if(in_array($Setting['id'], $WrongData))
					{
						if($Setting->{'error-message'})
						{
							$Temp.= self::FieldError($Setting->{'error-message'});
						}
						else
						{
							$Temp.= self::FieldError($lng['aps']['error_password']);
						}
					}
				}
				elseif($Setting['type'] == 'boolean')
				{
					if(!$GroupPrinted)
					{
						$Groupname = $Group->name;
						$GroupPrinted = true;
					}
					else
					{
						$Groupname = '';
					}

					$Value = self::GetInstallationValue($PackageId, $CustomerId, strval($Setting['id']));

					if($Value)
					{
						if($Value == 'true')
						{
							$Temp.= '<input checked="checked" name="' . $Setting['id'] . '" type="checkbox" value="true" />';
						}
						else
						{
							$Temp.= '<input name="' . $Setting['id'] . '" type="checkbox" value="true" />';
						}
					}
					elseif($Setting['default-value'] == 'true')
					{
						$Temp.= '<input checked="checked" name="' . $Setting['id'] . '" type="checkbox" value="true" />';
					}
					else
					{
						$Temp.= '<input name="' . $Setting['id'] . '" type="checkbox" value="true" />';
					}
				}
				elseif($Setting['type'] == 'enum')
				{
					if(!$GroupPrinted)
					{
						$Groupname = $Group->name;
						$GroupPrinted = true;
					}
					else
					{
						$Groupname = '';
					}

					$Temp.= '<select size="1" name="' . $Setting['id'] . '">';
					$Value = self::GetInstallationValue($PackageId, $CustomerId, strval($Setting['id']));
					foreach($Setting->choice as $Choice)
					{
						if($Value)
						{
							if(strval($Choice['id']) == $Value)
							{
								$Temp.= '<option selected="selected" value="' . $Choice['id'] . '">' . $Choice->name . '</option>';
							}
							else
							{
								$Temp.= '<option value="' . $Choice['id'] . '">' . $Choice->name . '</option>';
							}
						}
						elseif(strval($Choice['id']) == strval($Setting['default-value']))
						{
							$Temp.= '<option selected="selected" value="' . $Choice['id'] . '">' . $Choice->name . '</option>';
						}
						else
						{
							$Temp.= '<option value="' . $Choice['id'] . '">' . $Choice->name . '</option>';
						}
					}

					$Temp.= '</select>';
				}

				//default field description

				if(isset($Setting->description))
				{
					if(!in_array(strval($Setting['id']), $WrongData))$Temp.= '<br/>';
					$Temp.= '<em>' . $Setting->description . '</em>';
				}

				$Fieldname = $Setting->name;
				$Fieldvalue = $Temp;
				eval("\$Data.=\"" . getTemplate("aps/data") . "\";");
			}
		}

		if ($this->aps_version != '1.0')
		{
			$xml_license = $Xml->service->license;
		}
		else
		{
			$xml_license = $Xml->license;
		}
		
		if($xml_license)
		{
			$Temp = '';

			if($xml_license['must-accept']
			   && $xml_license['must-accept'] == 'true')
			{
				if($xml_license->text->name)$Temp.= $xml_license->text->name . '<br/>';

				if($xml_license->text->file)
				{
					$Temp.= '<textarea name="text" rows="10" cols="55">';
					$FileContent = file_get_contents('./packages/' . $Row['Path'] . '/license.txt');
					$Temp.= htmlentities($FileContent, ENT_QUOTES, 'ISO-8859-1');
					$Temp.= '</textarea>';
					$Groupname = $lng['aps']['license'];
					$Fieldname = $lng['aps']['license'];
					$Fieldvalue = $Temp;
					eval("\$Data.=\"" . getTemplate("aps/data") . "\";");
				}
				else
				{
					$Temp.= '<a target="_blank" href="' . htmlspecialchars($xml_license->text->url) . '">' . $lng['aps']['error_license'] . '</a>';
					$Groupname = $lng['aps']['license'];
					$Fieldname = $lng['aps']['license'];
					$Fieldvalue = $Temp;
					eval("\$Data.=\"" . getTemplate("aps/data") . "\";");
				}

				$Temp = '<input name="license" type="checkbox" value="true" /> ' . $lng['aps']['error_license'];

				if(in_array('license', $WrongData))
				{
					$Temp.= self::FieldError($lng['aps']['error_licensenoaccept']);
				}

				$Groupname = '';
				$Fieldname = $lng['aps']['license_agreement'];
				$Fieldvalue = $Temp;
				eval("\$Data.=\"" . getTemplate("aps/data") . "\";");
			}
		}

		eval("echo \"" . getTemplate("aps/installer") . "\";");
		unset($Xml);
	}

	/**
	 * show informations for a package in basic or detailed view
	 *
	 * @param	packageid		id of package from database
	 * @param	mode			verbosity of data to view (basic|advanced)
	 * @return	error false / success none
	 */

	private function ShowPackageInfo($PackageId, $All = false)
	{
		global $lng, $filename, $s, $page, $action, $userinfo;
		$Data = '';
		$Fieldname = '';
		$Fieldvalue = '';
		$Groupname = '';

		if(!self::IsValidPackageId($PackageId, true))return false;
		$result = $this->db->query('SELECT * FROM `' . TABLE_APS_PACKAGES . '` WHERE `ID` = ' . $this->db->escape($PackageId));
		$Row = $this->db->fetch_array($result);
		$Xml = self::GetXmlFromFile('./packages/' . $Row['Path'] . '/APP-META.xml');

		//return if parse of xml file has failed

		if($Xml == false)return false;
		$Icon = './images/default.png';

		$this->aps_version = isset($Xml->attributes()->version) ? (string)$Xml->attributes()->version : '1.0';

		//show icon and basic data
		if($this->aps_version != '1.0')
		{
			$iconpath = $Xml->presentation->icon['path'];
			$Summary = htmlspecialchars($Xml->presentation->summary);
			$categories = $Xml->presentation->categories;
			$languages =  $Xml->presentation->languages;
			$description = $Xml->presentation->description;
			$changelogs = $Xml->presentation->changelog;
			$license = $Xml->service->license;
			$screenshots = $Xml->presentation->screenshot;			
		} 
		else
		{
			$iconpath = $Xml->icon['path'];
			$Summary = htmlspecialchars($Xml->summary);
			$categories = $Xml->categories;
			$languages =  $Xml->languages;
			$description = $Xml->description;
			$changelogs = $Xml->changelog;
			$license = $Xml->license;
			$screenshots = $Xml->screenshot;
		}

		if($iconpath)
		{
			$Icon = './packages/' . $Row['Path'] . '/' . basename($iconpath);
		}

		$Fieldname = $lng['aps']['version'];
		$Fieldvalue = $Xml->version . ' (Release ' . $Xml->release . ')';
		eval("\$Data.=\"" . getTemplate("aps/data") . "\";");

		//show website

		if($Xml->homepage)
		{
			$Fieldname = $lng['aps']['homepage'];
			$Fieldvalue = '<a target="_blank" href="' . htmlspecialchars($Xml->homepage) . '">' . htmlspecialchars($Xml->homepage) . '</a>';
			eval("\$Data.=\"" . getTemplate("aps/data") . "\";");
		}

		//show size after installation

		if($Xml->{'installed-size'})
		{
			$Fieldname = $lng['aps']['installed_size'];
			$Fieldvalue = 'ca. ' . number_format(intval($Xml->{'installed-size'}) / (1024 * 1024), 2) . ' MB';
			eval("\$Data.=\"" . getTemplate("aps/data") . "\";");
		}

		//show categories

		if($categories)
		{
			$Temp = '';
			foreach($categories->category as $_categories)
			{
				$Temp.= htmlspecialchars($_categories[0]) . '<br/>';
			}

			$Fieldname = $lng['aps']['categories'];
			$Fieldvalue = $Temp;
			eval("\$Data.=\"" . getTemplate("aps/data") . "\";");
		}

		//show available languages

		if($languages)
		{
			$Temp = '';
			foreach($languages->language as $_languages)
			{
				$Temp.= $_languages[0] . ' ';
			}

			$Fieldname = $lng['aps']['languages'];
			$Fieldvalue = $Temp;
			eval("\$Data.=\"" . getTemplate("aps/data") . "\";");
		}

		//show more information

		if($All == true)
		{
			$Fieldname = $lng['aps']['long_description'];
			$Fieldvalue = htmlspecialchars($description);
			eval("\$Data.=\"" . getTemplate("aps/data") . "\";");

			//show config script language

			if($Xml->{'configuration-script-language'})
			{
				$Fieldname = $lng['aps']['configscript'];
				$Fieldvalue = $Xml->{'configuration-script-language'};
				eval("\$Data.=\"" . getTemplate("aps/data") . "\";");
			}

			//show changelog

			$Temp = '<ul>';
			foreach($changelogs->version as $Versions)
			{
				$Temp.= '<li><strong>' . $Versions['version'] . ' (Release ' . $Versions['release'] . ')</strong>';
				$Temp.= '<ul>';
				foreach($Versions->entry as $Entries)
				{
					$Temp.= '<li>' . $Entries[0] . '</li>';
				}

				$Temp.= '</ul></li>';
			}

			$Temp.= '</ul>';
			$Fieldname = $lng['aps']['changelog'];
			$Fieldvalue = $Temp;
			eval("\$Data.=\"" . getTemplate("aps/data") . "\";");

			//show license

			if($license)
			{
				if($license->text->file)
				{
					$Temp = '';

					if($license->text->name)$Temp = $license->text->name . '<br/>';
					$Temp.= '<form name="license" action="#"><textarea name="text" rows="10" cols="70">';
					$FileContent = file_get_contents('./packages/' . $Row['Path'] . '/license.txt');
					$Temp.= htmlentities($FileContent, ENT_QUOTES, 'ISO-8859-1');
					$Temp.= '</textarea></form>';
					$Fieldname = $lng['aps']['license'];
					$Fieldvalue = $Temp;
					eval("\$Data.=\"" . getTemplate("aps/data") . "\";");
				}
				else
				{
					$Fieldname = $lng['aps']['license'];
					$Fieldvalue = '<a target="_blank" href="' . htmlspecialchars($license->text->url) . '">' . $lng['aps']['linktolicense'] . '</a>';
					eval("\$Data.=\"" . getTemplate("aps/data") . "\";");
				}
			}

			//show screenshots

			if($screenshots)
			{
				$Count = 0;
				$Temp = '';
				foreach($screenshots as $Screenshot)
				{
					$Count+= 1;
					$Temp.= '<img src="./packages/' . $Row['Path'] . '/' . basename($Screenshot['path']) . '" alt="' . $Screenshot->description . '"/><br/><em>' . $Screenshot->description . '</em><br/>';

					if(count($screenshots) != $Count)$Temp.= '<br/>';
				}

				$Fieldname = $lng['aps']['screenshots'];
				$Fieldvalue = $Temp;
				eval("\$Data.=\"" . getTemplate("aps/data") . "\";");
			}
		}

		eval("echo \"" . getTemplate("aps/package") . "\";");
		unset($Xml);
	}

	/**
	 * show a nice looking infobox
	 *
	 * @param	message		message to display in beautifull layout
	 */

	private function InfoBox($Message)
	{
		global $lng, $filename, $s, $page, $action;

		//shows a box with informations

		eval("echo \"" . getTemplate("aps/infobox") . "\";");
	}

	/**
	 * returns html code for nice looking boxes to show customers wrong input
	 *
	 * @param	error		error to display in beautifull layout
	 */

	private function FieldError($Error)
	{
		return '<div class="fielderror">' . $Error . '</div>';
	}
}

?>