<?php
/*
$Id$

  This code is part of LDAP Account Manager (http://www.ldap-account-manager.org/)
  Copyright (C) 2003 - 2012  Roland Gruber

  This program is free software; you can redistribute it and/or modify
  it under the terms of the GNU General Public License as published by
  the Free Software Foundation; either version 2 of the License, or
  (at your option) any later version.

  This program is distributed in the hope that it will be useful,
  but WITHOUT ANY WARRANTY; without even the implied warranty of
  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  GNU General Public License for more details.

  You should have received a copy of the GNU General Public License
  along with this program; if not, write to the Free Software
  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA


*/

/**
* Interface between modules and other parts of LAM.
*
* @package modules
* @author Tilo Lutz
* @author Michael Duergner
* @author Roland Gruber
*/

/** some helper functions */
include_once("account.inc");
/** parent class of account modules */
include_once("baseModule.inc");
/** access to LDAP server */
include_once("ldap.inc");
/** lamdaemon functions */
include_once("lamdaemon.inc");
/** security functions */
include_once("security.inc");
/** meta HTML classes */
include_once("html.inc");

/**
* This includes all module files.
*/
$modulesINC_dirname = substr(__FILE__, 0, strlen(__FILE__) - 12) . "/modules";
$modulesINC_dir = dir($modulesINC_dirname);
// get module names.
while ($entry = $modulesINC_dir->read())
if ((substr($entry, strlen($entry) - 4, 4) == '.inc') && is_file($modulesINC_dirname . '/'.$entry)) {
	include_once($modulesINC_dirname . '/'.$entry);
}

/**
* Returns the alias name of a module
*
* @param string $name the module name
* @param string $scope the account type ("user", "group", "host")
* @return string alias name
*/
function getModuleAlias($name, $scope) {
	$module = new $name($scope);
	return $module->get_alias();
}

/**
* Returns true if the module is a base module
*
* @param string $name the module name
* @param string $scope the account type ("user", "group", "host")
* @return boolean true if base module
*/
function is_base_module($name, $scope) {
	$module = new $name($scope);
	return $module->is_base_module();
}

/**
* Returns the LDAP filter used by the account lists
*
* @param string $scope the account type ("user", "group", "host")
* @return string LDAP filter
*/
function get_ldap_filter($scope) {
	$mods = $_SESSION['config']->get_AccountModules($scope);
	$filters = array();
	$orFilter = '';
	for ($i = 0; $i < sizeof($mods); $i++) {
		$module = new $mods[$i]($scope);
		$modinfo = $module->get_ldap_filter();
		if (isset($modinfo['or'])) $filters['or'][] = $modinfo['or'];
		if (isset($modinfo['and'])) $filters['and'][] = $modinfo['and'];
	}
	// build OR filter
	if (sizeof($filters['or']) == 1) {
		$orFilter = $filters['or'][0];
	}
	elseif (sizeof($filters['or']) > 1) {
		$orFilter = "(|" . implode("", $filters['or']) . ")";
	}
	// add built OR filter to AND filters
	if ($orFilter != '') $filters['and'][] = $orFilter;
	// add type filter
	$typeSettings = $_SESSION['config']->get_typeSettings();
	if (isset($typeSettings['filter_' . $scope]) && ($typeSettings['filter_' . $scope] != '')) {
		$filters['and'][] = $typeSettings['filter_' . $scope];
	}
	// collapse AND filters
	$finalFilter = '';
	if (sizeof($filters['and']) < 2) {
		$finalFilter = $filters['and'][0];
	}
	else {
		$finalFilter = "(&" . implode("", $filters['and']) . ")";
	}
	$loginData = $_SESSION['ldap']->decrypt_login();
	$finalFilter = str_replace('@@LOGIN_DN@@', $loginData[0], $finalFilter);
	return $finalFilter;
}

/**
* Returns a list of LDAP attributes which can be used to form the RDN.
*
* The list is already sorted by the priority given by the nodules.
*
* @param string $scope account type (user, group, host)
* @param array $selectedModules return only RDN attributes of these modules
* @return array list of LDAP attributes
*/
function getRDNAttributes($scope, $selectedModules=null) {
	$mods = $_SESSION['config']->get_AccountModules($scope);
	if ($selectedModules != null) {
		$mods = $selectedModules;
	}
	$return = array();
	$attrs_low = array();
	$attrs_normal = array();
	$attrs_high = array();
	for ($i = 0; $i < sizeof($mods); $i++) {
		// get list of attributes
		$module = new $mods[$i]($scope);
		$attrs = $module->get_RDNAttributes();
		$keys = array_keys($attrs);
		// sort attributes
		for ($k = 0; $k < sizeof($keys); $k++) {
			switch ($attrs[$keys[$k]]) {
				case "low":
					$attrs_low[] = $keys[$k];
					break;
				case "normal":
					$attrs_normal[] = $keys[$k];
					break;
				case "high":
					$attrs_high[] = $keys[$k];
					break;
				default:
					$attrs_low[] = $keys[$k];
					break;
			}
		}
	}
	// merge arrays
	$return = array_values(array_unique($attrs_high));
	for ($i = 0; $i < sizeof($attrs_normal); $i++) {
		if (!in_array($attrs_normal[$i], $return)) $return[] = $attrs_normal[$i];
	}
	for ($i = 0; $i < sizeof($attrs_low); $i++) {
		if (!in_array($attrs_low[$i], $return)) $return[] = $attrs_low[$i];
	}
	return $return;
}

/**
* Returns a hash array (module name => dependencies) of all module dependencies
*
* "dependencies" contains an array with two sub arrays: depends, conflicts
* <br>The elements of "depends" are either module names or an array of module names (OR-case).
* <br>The elements of conflicts are module names.
*
* @param string $scope the account type (user, group, host)
* @return array dependencies
*/
function getModulesDependencies($scope) {
	$mods = getAvailableModules($scope);
	for ($i = 0; $i < sizeof($mods); $i++) {
		$module = new $mods[$i]($scope);
		$return[$mods[$i]] = $module->get_dependencies();
	}
	return $return;
}


/**
* Checks if there are missing dependencies between modules.
*
* @param array $selected selected module names
* @param array $deps module dependencies
* @return mixed false if no misssing dependency was found,
* otherwise an array of array(selected module, depending module) if missing dependencies were found
*/
function check_module_depends($selected, $deps) {
	$ret = array();
	for ($m = 0; $m < sizeof($selected); $m++) {  // check selected modules
		for ($i = 0; $i < sizeof($deps[$selected[$m]]['depends']); $i++) {  // check dependencies of module
			// check if we have OR-combined modules
			if (is_array($deps[$selected[$m]]['depends'][$i])) {
				// one of the elements is needed
				$found = false;
				$depends = $deps[$selected[$m]]['depends'][$i];
				for ($d = 0; $d < sizeof($depends); $d++) {
					if (in_array($depends[$d], $selected)) {
						$found = true;
						break;
					}
				}
				if (! $found) {
					// missing dependency, add to return value
					$ret[] = array($selected[$m], implode(" || ", $depends));
				}
			}
			else {
				// single dependency
				if (! in_array($deps[$selected[$m]]['depends'][$i], $selected)) {
					// missing dependency, add to return value
					$ret[] = array($selected[$m], $deps[$selected[$m]]['depends'][$i]);
				}
			}
		}
	}
	if (sizeof($ret) > 0) return $ret;
	else return false;
}

/**
* Checks if there are conflicts between modules
*
* @param array $selected selected module names
* @param array $deps module dependencies
* @return boolean false if no conflict was found,
* otherwise an array of array(selected module, conflicting module) if conflicts were found
*/
function check_module_conflicts($selected, $deps) {
	$ret = array();
	for ($m = 0; $m < sizeof($selected); $m++) {
		for ($i = 0; $i < sizeof($deps[$selected[$m]]['conflicts']); $i++) {
			if (in_array($deps[$selected[$m]]['conflicts'][$i], $selected)) {
				$ret[] = array($selected[$m], $deps[$selected[$m]]['conflicts'][$i]);
			}
		}
	}
	if (sizeof($ret) > 0) return $ret;
	else return false;
}

/**
* Returns an array with all available user module names
*
* @param string $scope account type (user, group, host)
* @param boolean $mustSupportAdminInterface module must support LAM admin interface (default: false)
* @return array list of possible modules
*/
function getAvailableModules($scope, $mustSupportAdminInterface = false) {
	$dirname = substr(__FILE__, 0, strlen(__FILE__) - 12) . "/modules";
	$dir = dir($dirname);
	$return = array();
	// get module names.
	while ($entry = $dir->read())
		if ((substr($entry, strlen($entry) - 4, 4) == '.inc') && is_file($dirname . '/'.$entry)) {
			$entry = substr($entry, 0, strpos($entry, '.'));
			$temp = new $entry($scope);
			if ($mustSupportAdminInterface && !$temp->supportsAdminInterface()) {
				continue;
			}
			if ($temp->can_manage()) {
				$return[] = $entry;
			}
		}
	return $return;
}

/**
* Returns the elements for the profile page.
*
* @param string $scope account type (user, group, host)
* @return array profile elements
*/
function getProfileOptions($scope) {
	$mods = $_SESSION['config']->get_AccountModules($scope);
	$return = array();
	for ($i = 0; $i < sizeof($mods); $i++) {
		$module = new $mods[$i]($scope);
		$return[$mods[$i]] = $module->get_profileOptions();
	}
	return $return;
}

/**
* Checks if the profile options are valid
*
* @param string $scope account type (user, group, host)
* @param array $options hash array containing all options (name => array(...))
* @return array list of error messages
*/
function checkProfileOptions($scope, $options) {
	$mods = $_SESSION['config']->get_AccountModules($scope);
	$return = array();
	for ($i = 0; $i < sizeof($mods); $i++) {
		$module = new $mods[$i]($scope);
		$temp = $module->check_profileOptions($options);
		$return = array_merge($return, $temp);
	}
	return $return;
}

/**
* Returns a hash array (module name => elements) of all module options for the configuration page.
*
* @param array $scopes hash array (module name => array(account types))
* @return array configuration options
*/
function getConfigOptions($scopes) {
	$return = array();
	$modules = array_keys($scopes);
	for ($i = 0; $i < sizeof($modules); $i++) {
		$m = new $modules[$i]('none');
		$return[$modules[$i]] = $m->get_configOptions($scopes[$modules[$i]], $scopes);
	}
	return $return;
}

/**
* Checks if the configuration options are valid
*
* @param array $scopes hash array (module name => array(account types))
* @param array $options hash array containing all options (name => array(...))
* @return array list of error messages
*/
function checkConfigOptions($scopes, &$options) {
	$return = array();
	$modules = array_keys($scopes);
	for ($i = 0; $i < sizeof($modules); $i++) {
		$m = new $modules[$i]('none');
		$errors = $m->check_configOptions($scopes[$modules[$i]], $options);
		if (isset($errors) && is_array($errors)) {
			$return = array_merge($return, $errors);
		}
	}
	return $return;
}

/**
* Returns a help entry from an account module.
*
* @param string $module module name
* @param string $helpID help identifier
* @param string $scope account type
* @return array help entry
*/
function getHelp($module,$helpID,$scope='') {
	if (!isset($module) || ($module == '') || ($module == 'main')) {
		$helpPath = "../help/help.inc";
		if (is_file("../../help/help.inc")) $helpPath = "../../help/help.inc";
		if (!isset($helpArray)) {
			include($helpPath);
		}
		return $helpArray[$helpID];
	}
	$moduleObject = new $module((($scope != '') ? $scope : 'none'));
	return $moduleObject->get_help($helpID);
}

/**
* Returns a list of available PDF entries.
*
* @param string $scope account type (user, group, host)
* @return array PDF entries (field ID => field label)
*/
function getAvailablePDFFields($scope) {
	$mods = $_SESSION['config']->get_AccountModules($scope);
	$return = array();
	for ($i = 0; $i < sizeof($mods); $i++) {
		$module = new $mods[$i]($scope);
		$fields = $module->get_pdfFields();
		$return[$mods[$i]] = array();
		if (is_array($fields)) {
			foreach ($fields as $fieldID => $fieldLabel) {
				if (is_integer($fieldID)) {
					// support old PDF field list which did not contain a label
					$return[$mods[$i]][$fieldLabel] = $fieldLabel;
				}
				else {
					$return[$mods[$i]][$fieldID] = $fieldLabel;
				}
			}
		}
	}
	$return['main'] = array('dn' => _('DN'));
	return $return;
}

/**
* Returns an array containing all input columns for the file upload.
*
* Syntax:
* <br> array(
* <br>  string: name,  // fixed non-translated name which is used as column name (should be of format: <module name>_<column name>)
* <br>  string: description,  // short descriptive name
* <br>  string: help,  // help ID
* <br>  string: example,  // example value
* <br>  boolean: required  // true, if user must set a value for this column
* <br> )
*
* @param string $scope account type
* @param array $selectedModules selected account modules
* @return array column list
*/
function getUploadColumns($scope, $selectedModules) {
	$return = array();
	for ($i = 0; $i < sizeof($selectedModules); $i++) {
		$module = new $selectedModules[$i]($scope);
		$return[$selectedModules[$i]] = $module->get_uploadColumns($selectedModules);
	}
	return $return;
}

/**
* This function builds the LDAP accounts for the file upload.
*
* If there are problems status messages will be printed automatically.
*
* @param string $scope account type
* @param array $data array containing one account in each element
* @param array $ids array(<column_name> => <column number>)
* @param array $selectedModules selected account modules
* @return mixed array including accounts or false if there were errors
*/
function buildUploadAccounts($scope, $data, $ids, $selectedModules) {
	// build module order
	$unOrdered = $selectedModules;
	$ordered = array();
	$predepends = array();
	// get dependencies
	for ($i = 0; $i < sizeof($unOrdered); $i++) {
		$mod = new $unOrdered[$i]($scope);
		$predepends[$unOrdered[$i]] = $mod->get_uploadPreDepends();
	}
	// first all modules without predepends can be ordered
	for ($i = 0; $i < sizeof($unOrdered); $i++) {
		if (sizeof($predepends[$unOrdered[$i]]) == 0) {
			$ordered[] = $unOrdered[$i];
			unset($unOrdered[$i]);
			$unOrdered = array_values($unOrdered);
			$i--;
		}
	}
	$unOrdered = array_values($unOrdered);  // fix indexes
	// now add all modules with fulfilled dependencies until all are in order
	while (sizeof($unOrdered) > 0) {
		$newRound = false;
		for ($i = 0; $i < sizeof($unOrdered); $i++) {
			$deps = $predepends[$unOrdered[$i]];
			$depends = false;
			for ($d = 0; $d < sizeof($deps); $d++) {
				if (in_array($deps[$d], $unOrdered)) {
					$depends = true;
					break;
				}
			}
			if (!$depends) {  // add to order if dependencies are fulfilled
				$ordered[] = $unOrdered[$i];
				unset($unOrdered[$i]);
				$unOrdered = array_values($unOrdered);
				$newRound = true;
				break;
			}
		}
		if ($newRound) continue;
		// this point should never be reached, LAM was unable to find a correct module order
		StatusMessage("ERROR", "Internal Error: Unable to find correct module order.", "");
		return false;
	}
	// give raw data to modules
	$errors = array();
	$partialAccounts = array();
	for ($i = 0; $i < sizeof($data); $i++) $partialAccounts[$i]['objectClass'] = array();
	for ($i = 0; $i < sizeof($ordered); $i++) {
		$module = new $ordered[$i]($scope);
		$errors = $module->build_uploadAccounts($data, $ids, $partialAccounts, $selectedModules);
		if (sizeof($errors) > 0) {
			array_unshift($errors, array("INFO", _("Displayed account numbers start at \"0\". Add 2 to get the row in your spreadsheet."), ""));
			$errors[] = array("ERROR", _("Upload was stopped after errors in %s module!"), "", array($module->get_alias()));
			break;
		}
	}
	if (sizeof($errors) > 0) {
		for ($i = 0; (($i < sizeof($errors)) || ($i > 49)); $i++) call_user_func_array("StatusMessage", $errors[$i]);
		return false;
	}
	else return $partialAccounts;
}

/**
 * Runs any actions that need to be done before an LDAP entry is created.
 * 
 * @param String $scope account type
 * @param array $selectedModules list of selected account modules
 * @param array $attributes LDAP attributes of this entry (attributes are provided as reference, handle modifications of $attributes with care)
 * @return array array which contains status messages. Each entry is an array containing the status message parameters.
 */
function doUploadPreActions($scope, $selectedModules, $attributes) {
	$messages = array();
	for ($i = 0; $i < sizeof($selectedModules); $i++) {
		$activeModule = $selectedModules[$i];
		$module = new $activeModule($scope);
		$messages = array_merge($messages, $module->doUploadPreActions($attributes));
	}
	return $messages;
}

/**
* This function executes one post upload action.
*
* @param string $scope account type
* @param array $data array containing one account in each element
* @param array $ids array(<column_name> => <column number>)
* @param array $failed list of accounts which were not created successfully
* @param array $selectedModules list of selected account modules
* @param array $accounts list of LDAP entries
* @return array current status
* <br> array (
* <br>  'status' => 'finished' | 'inProgress'
* <br>  'module' => <name of active module>
* <br>  'progress' => 0..100
* <br>  'errors' => array (<array of parameters for StatusMessage>)
* <br> )
*/
function doUploadPostActions($scope, &$data, $ids, $failed, $selectedModules, &$accounts) {
	// check if function is called the first time
	if (! isset($_SESSION['mass_postActions']['remainingModules'])) {
		// make list of remaining modules
		$moduleList = $selectedModules;
		$_SESSION['mass_postActions']['remainingModules'] = $moduleList;
	}
	$activeModule = $_SESSION['mass_postActions']['remainingModules'][0];
	// initialize temporary variable
	if (!isset($_SESSION['mass_postActions'][$activeModule])) {
		$_SESSION['mass_postActions'][$activeModule] = array();
	}
	// let first module do one post action
	$module = new $activeModule($scope);
	$return = $module->doUploadPostActions($data, $ids, $failed, $_SESSION['mass_postActions'][$activeModule], $accounts);
	// remove active module from list if already finished
	if ($return['status'] == 'finished') {
		unset($_SESSION['mass_postActions']['remainingModules'][0]);
		$_SESSION['mass_postActions']['remainingModules'] = array_values($_SESSION['mass_postActions']['remainingModules']);
	}
	// update status and return back to upload page
	$return['module'] = $activeModule;
	if (sizeof($_SESSION['mass_postActions']['remainingModules']) > 0) {
		$return['status'] = 'inProgress';
	}
	else {
		$return['status'] = 'finished';
	}
	return $return;
}

/**
* Returns true if the module is a base module
*
* @return array required extensions
*/
function getRequiredExtensions() {
	$extList = array();
	$scopes = $_SESSION['config']->get_ActiveTypes();
	for ($i = 0; $i < sizeof($scopes); $i++) {
		$mods = $_SESSION['config']->get_AccountModules($scopes[$i]);
		for ($m = 0; $m < sizeof($mods); $m++) {
			$module = new $mods[$m]($scopes[$i]);
			$ext = $module->getRequiredExtensions();
			for ($e = 0; $e < sizeof($ext); $e++) {
				if (!in_array($ext[$e], $extList)) $extList[] = $ext[$e];
			}
		}
	}
	return $extList;
}

/**
* Takes a list of meta-HTML elements and prints the equivalent HTML output.
* 
* The modules are not allowed to display HTML code directly but return
* meta HTML code. This allows to have a common design for all module pages.
*
* @param string $module Name of account module
* @param mixed $input htmlElement or array of htmlElement elements
* @param array $values List of values which override the defaults in $input (name => value)
* @param boolean $restricted If true then no buttons will be displayed
* @param integer $tabindex Start value of tabulator index for input fields
* @param string $scope Account type
* @return array List of input field names and their type (name => type)
*/
function parseHtml($module, $input, $values, $restricted, &$tabindex, $scope) {
	if ($input instanceof htmlElement) {
		return $input->generateHTML($module, $input, $values, $restricted, $tabindex, $scope);
	}
	if (is_array($input) && (sizeof($input) > 0)) {
		$return = array();
		for ($i = 0; $i < sizeof($input); $i++) {
			$return = array_merge($return, $input[$i]->generateHTML($module, $input, $values, $restricted, $tabindex, $scope));
		}
		return $return;
	}
	return array();
}

/**
 * Helper function to sort descriptive options in parseHTML().
 * It compares the second entries of two arrays.
 *
 * @param array $a first array
 * @param array $b second array
 * @return integer compare result
 */
function lamCompareDescriptiveOptions(&$a, &$b) {
	// check parameters
	if (!is_array($a) || !isset($a[1]) || !is_array($b) || !isset($b[1])) {
		return 0;
	}
	return strnatcasecmp($a[1], $b[1]);
}

/**
 * Prints a LAM help link.
 *
 * @param array $entry help entry
 * @param String $number help number
 * @param String $module module name
 * @param String $scope account scope
 */
function printHelpLink($entry, $number, $module='', $scope='') {
	$helpPath = "../";
	if (is_file("./help.php")) $helpPath = "";
	$title = $entry['Headline'];
	$message = $entry['Text'];
	if (isset($entry['attr'])) {
		$message .= '<br><br><hr class="dotted">' . _('Technical name') . ': <i>' . $entry['attr'] . '</i>';
	}
	// replace special characters
	$message = str_replace(array("'", '"', "\n"), array("\\'", '&quot;', ''), $message);
	$title = str_replace(array("'", '"', "\n"), array("\\'", '&quot;', ''), $title);
	echo "<a href=\"" . $helpPath . "help.php?module=$module&amp;HelpNumber=". $number . "&amp;scope=" . $scope . "\" ";
		echo "target=\"help\" ";
		echo "onmouseover=\"Tip('" . $message . "', TITLE, '" . $title . "')\" onmouseout=\"UnTip()\">";
		echo "<img class=\"align-middle\" width=16 height=16 src=\"../$helpPath/graphics/help.png\" alt=\"" . _('Help') . "\" title=\"" . _('Help') . "\">";
	echo "</a>";
}


/**
* This class includes all modules and attributes of an account.
*
* @package modules
*/
class accountContainer {
	
	/**
	* Constructor
	*
	* @param string $type account type
	* @param string $base key in $_SESSION where this object is saved
	*/
	function __construct($type, $base) {
		/* Set the type of account. Valid
		* types are: user, group, host
		*/
		// Check input variable

		if (!is_string($type)) trigger_error('Argument of accountContainer must be string.', E_USER_ERROR);
		if (!is_string($base)) trigger_error('Argument of accountContainer must be string.', E_USER_ERROR);
		$this->type = $type;
		$this->base = $base;
		// Set startpage
		$this->current_page=0;
		$this->subpage='attributes';
		$this->isNewAccount = false;
		return 0;
		}

	/**
	* Array of all used attributes
	* Syntax is attribute => array ( objectClass => MUST or MAY, ...)
	*/
	public $attributes;

	/**
	* This variale stores the account type.
	* Currently "user", "group" and "host" are supported.
	*/
	private $type;

	/** This is an array with all module objects */
	private $module;

	/** DN suffix of the account */
	public $dnSuffix;

	/** DN of account when it was loaded */
	public $dn_orig;

	/** RDN attribute of this account */
	public $rdn;
	
	/** DN of saved account */
	public $finalDN;

	/** original LDAP attributes when account was loaded from LDAP */
	public $attributes_orig;

	/** Module order */
	private $order;

	/** Name of accountContainer variable in session */
	private $base;

	/** This variable stores the page number of the currently displayed page */
	private $current_page = 0;

	/** This variable is set to the pagename of a subpage if it should be displayed */
	private $subpage;

	/** True if this is a newly created account */
	public $isNewAccount;
	
	/** name of last loaded account profile */
	private $lastLoadedProfile = '';
	
	/** cache for existing OUs */
	private $cachedOUs = null;
	
	/** main title in title bar */
	private $titleBarTitle = null;
	/** subtitle in title bar */
	private $titleBarSubtitle = null;
	/** send password via mail */
	private $sendPasswordViaMail = null;

	/**
	 * Returns the account module with the given class name
	 *
	 * @param string $name class name (e.g. posixAccount)
	 * @return baseModule account module
	 */
	function getAccountModule($name) {
		if (isset($this->module[$name])) {
			return $this->module[$name];
		}
		else {
			return null;
		}
	}
	
	/**
	 * Returns the included account modules.
	 *
	 * @return array modules
	 */
	function getAccountModules() {
		return $this->module;
	}
	
	/**
	* Returns the accout type of this object (e.g. user, group, host).
	*
	* @return string account type
	*/
	function get_type() {
		return $this->type;
		}

	/**
	* This function is called when the user clicks on any button on the account pages.
	* It prints the HTML code of each account page.
	*/
	function continue_main() {
		$result = array();
		$stopProcessing = false; // when set to true, no module options are displayed
		$errorsOccured = false;
		$typeObject = new $this->type();
		$profileLoaded = $this->loadProfileIfRequested();
		if ($this->subpage=='') $this->subpage='attributes';
		if (isset($_POST['accountContainerReset'])) {
			$result = $this->load_account($this->dn_orig);
		}
		elseif (!$profileLoaded) {
			// change dn suffix
			if (isset($_GET['suffix']) && ($_GET['suffix'] != '') && ($this->dnSuffix == null)) {
				$this->dnSuffix = $_GET['suffix'];
			}
			if (isset($_POST['accountContainerSuffix']) && ($_POST['accountContainerSuffix'] != '')) {
				$this->dnSuffix = $_POST['accountContainerSuffix'];
			}
			// change RDN
			if (isset($_POST['accountContainerRDN'])) {
				$this->rdn = $_POST['accountContainerRDN'];
			}
			// create another account
			if (isset($_POST['accountContainerCreateAgain'])) {
				// open fresh account page
				unset($_SESSION[$this->base]);
				metaRefresh("edit.php?type=" . $this->type . "&amp;suffix=" . $this->dnSuffix);
				exit();
			}
			// reedit account
			if (isset($_POST['accountContainerBackToEdit'])) {
				// open fresh account page
				unset($_SESSION[$this->base]);
				metaRefresh("edit.php?type=" . $this->type . "&amp;DN=" . urlencode($this->finalDN));
				exit();
			}
			// back to account list
			if (isset($_POST['accountContainerBackToList'])) {
				// Return to account list
				unset($_SESSION[$this->base]);
				metaRefresh("../lists/list.php?type=" . $this->type);
				exit;
			}
			// create PDF file
			if (isset($_POST['accountContainerCreatePDF'])) {
				metaRefresh('../lists/list.php?printPDF=1&amp;type=' . $this->type . "&amp;PDFSessionID=" . $this->base);
				exit;
			}
			// module actions
			if ((sizeof($_POST) > 0) && checkIfWriteAccessIsAllowed()) {
				$result = call_user_func(array(&$this->module[$this->order[$this->current_page]], 'process_'.$this->subpage));
				if (is_array($result)) {  // messages were returned, check for errors
					for ($i = 0; $i < sizeof($result); $i++) {
						if ($result[$i][0] == 'ERROR') {
							$errorsOccured = true;
							break;
						}
					}
				}
				$this->sortModules();
			}
			// run type post actions
			$typeObject->runEditPagePostAction($this);
			// save account
			if (!$errorsOccured && isset($_POST['accountContainerSaveAccount'])) {
				// check if all modules are complete
				$modules = array_keys($this->module);
				$incompleteModules = array();
				foreach ($modules as $module) {
					if (!$this->module[$module]->module_complete()) {
						$incompleteModules[] = $this->module[$module]->get_alias();
					}
				}
				if (sizeof($incompleteModules) > 0) {
					$result[] = array('INFO', _('Some required information is missing'),
						sprintf(_('Please set up all required attributes on page: %s'), implode(", ", $incompleteModules)));
				}
				else {
					// save account
					$saveMessages = $this->save_account();
					$saveOk = true;
					for ($i = 0; $i < sizeof($saveMessages); $i++) {
						if ($saveMessages[$i][0] == 'ERROR') {
							$saveOk = false;
						}
					}
					if (!$saveOk) {
						$result = $saveMessages;
						$stopProcessing = true;
					}
					else {
						$this->printSuccessPage($saveMessages);
						return;
					}
				}
			}
		}
		// change to next page
		if (is_array($result)) {  // messages were returned, check for errors
			for ($i = 0; $i < sizeof($result); $i++) {
				if ($result[$i][0] == 'ERROR') {
					$errorsOccured = true;
					break;
				}
			}
		}
		if (!$errorsOccured) {
			// go to subpage of current module
			$postKeys = array_keys($_POST);
			for ($p = 0; $p < sizeof($postKeys); $p++) {
				if (is_string($postKeys[$p]) && (strpos($postKeys[$p], 'form_subpage_' . $this->order[$this->current_page]) === 0)) {
					$temp = substr($postKeys[$p], strlen($this->order[$this->current_page]) + 14);
					$temp = explode('_', $temp);
					if (sizeof($temp) == 2) {
						$this->subpage = $temp[0];
					}
				}
			}
			for ($i=0; $i<count($this->order); $i++ ) {
				if (isset($_POST['form_main_'.$this->order[$i]])) {
					if ($this->module[$this->order[$i]]->module_ready()) {
						$this->current_page = $i;
						$this->subpage='attributes';
					}
					else {
						StatusMessage('ERROR', _('The module %s is not yet ready.'),
							_('Please enter the account information on the other pages first.'),
							array($this->module[$this->order[$i]]->get_alias()));
					}
				}
			}
		}
		// update titles
		$this->titleBarTitle = $typeObject->getTitleBarTitle($this);
		$this->titleBarSubtitle = $typeObject->getTitleBarSubtitle($this);
		// prints a module content page
		$this->printModuleContent($result, $stopProcessing);
	}
	
	/**
	 * Prints the content part provided by the current module.
	 * 
	 * @param array $result list of messages
	 * @param boolean $stopProcessing true if page should end after displaying the messages
	 */
	private function printModuleContent($result, $stopProcessing) {
		$tabindex = 1;
		$this->printPageHeader();
		$this->printPasswordPromt();
		// display error messages
		if (is_array($result)) {
			for ($i=0; $i<sizeof($result); $i++) {
				call_user_func_array("StatusMessage", $result[$i]);
			}
			if ($stopProcessing) {
				$this->printPageFooter();
				return;
			}
		}
		echo '<div id="passwordMessageArea"></div>';
		echo "<table class=\"".$this->type."-bright\" border=0 width=\"100%\" style=\"border-collapse: collapse;\">\n";
		if (checkIfWriteAccessIsAllowed()) {
			echo "<tr class=\"".$this->type."-bright\"><td style=\"padding: 15px 15px 0px 15px;\">\n";
			$this->printCommonControls($tabindex);
			echo "</td></tr>\n";
		}
		echo "<tr class=\"".$this->type."-bright\" valign=\"top\"><td style=\"padding: 15px;\">";
		// print title bar
		echo '<div class="titleBar ui-corner-top">';
		echo '<table width="100%"><tr>';
		echo '<td><div class="titleBarTitle">';
		echo $this->titleBarTitle;
		echo '</div></td>';
		echo '<td align="right">';
			$group = new htmlGroup();
			// suffix
			$group->addElement(new htmlOutputText(_('Suffix')));
			$group->addElement(new htmlSpacer('2px', null));
			$suffixList = array();
			foreach ($this->getOUs() as $suffix) {
				$suffixList[getAbstractDN($suffix)] = $suffix;
			}
			if (!($this->dnSuffix == '') && !in_array($this->dnSuffix, $this->getOUs())) {
				$suffixList[getAbstractDN($this->dnSuffix)] = $this->dnSuffix;
			}
			$selectedSuffix = array($this->dnSuffix);
			$suffixSelect = new htmlSelect('accountContainerSuffix', $suffixList, $selectedSuffix);
			$suffixSelect->setHasDescriptiveElements(true);
			$suffixSelect->setRightToLeftTextDirection(true);
			$group->addElement($suffixSelect);
			$group->addElement(new htmlSpacer('10px', null));
			// RDN selection
			$group->addElement(new htmlOutputText(_('RDN identifier')));
			$group->addElement(new htmlSpacer('2px', null));
			$rdnlist = getRDNAttributes($this->type);
			$group->addElement(new htmlSelect('accountContainerRDN', $rdnlist, array($this->rdn)));
			$group->addElement(new htmlHelpLink('301'));
			parseHtml(null, $group, array(), true, $tabindex, $this->type);
		echo '</td>';
		echo '</tr></table>';
		if ($this->titleBarSubtitle != null) {
			echo '<div class="titleBarSubtitle">';
			echo $this->titleBarSubtitle;
			echo '</div>';
		}
		echo '</div>';
		echo '<div id="lamVerticalTabs" class="ui-tabs ui-widget ui-widget-content ui-corner-bottom ui-helper-clearfix">';
		// tab menu
		$this->printModuleTabs();
		echo "<div class=\"lamEqualHeightTabContent ui-tabs-panel ui-widget-content ui-corner-bottom\">\n";
		// content area
		// display html-code from modules
		$return = call_user_func(array($this->module[$this->order[$this->current_page]], 'display_html_'.$this->subpage));
		$y = 5000;
		parseHtml($this->order[$this->current_page], $return, array(), false, $y, $this->type);
		echo "</div>\n";
		echo "</div>\n";
		echo "</td></tr>\n";
		// Display rest of html-page
		echo "</table>\n";
		$this->printPageFooter();
	}

	/**
	 * Prints the input fields of the central password service.
	 */
	private function printPasswordPromt() {
		echo "<div id=\"passwordDialog\" class=\"hidden\">\n";
		echo '<div id="passwordDialogMessageArea"></div>';
		$printContainer = false;
		$container = new htmlTable();
		// password fields
		$container->addElement(new htmlOutputText(_('Password')));
		$pwdInput1 = new htmlInputField('newPassword1');
		$pwdInput1->setIsPassword(true);
		$container->addElement($pwdInput1);
		$container->addElement(new htmlHelpLink('404'), true);
		$container->addElement(new htmlOutputText(_('Repeat password')));
		$pwdInput2 = new htmlInputField('newPassword2');
		$pwdInput2->setIsPassword(true);
		$container->addElement($pwdInput2, true);
		// print force password change option
		$forceChangeSupported = false;
		foreach ($this->module as $name => $module) {
			if (($module instanceof passwordService) && $module->supportsForcePasswordChange()) {
				$forceChangeSupported = true;
				break;
			}
		}
		if ($forceChangeSupported) {
			$container->addElement(new htmlTableExtendedInputCheckbox('lamForcePasswordChange', false, _('Force password change')));
			$container->addElement(new htmlHelpLink('406'), true);
		}
		if (isLAMProVersion() && isset($this->attributes_orig['mail'][0])) {
			$container->addElement(new htmlTableExtendedInputCheckbox('lamPasswordChangeSendMail', false, _('Send via mail')));
			$container->addElement(new htmlHelpLink('407'), true);
		}
		$container->addElement(new htmlSpacer(null, '10px'), true);
		// password modules
		$moduleContainer = new htmlTable();
		foreach ($this->module as $name => $module) {
			if (($module instanceof passwordService) && $module->managesPasswordAttributes()) {
				$printContainer = true;
				$buttonImage = $module->getIcon();
				if ($buttonImage != null) {
					$moduleContainer->addElement(new htmlImage('../../graphics/' . $buttonImage, null, null, getModuleAlias($name, $this->type)));
				}
				$moduleContainer->addElement(new htmlTableExtendedInputCheckbox('password_cb_' . $name, true, getModuleAlias($name, $this->type), null, false));
				$moduleContainer->addElement(new htmlSpacer('10px', null));
			}
		}
		$moduleContainer->colspan = 5;
		$container->addElement($moduleContainer, true);
		// generate HTML
		$tabindex = 2000;
		if ($printContainer) {
			parseHtml(null, $container, array(), false, $tabindex, $this->type);
		}
		echo "</div>\n";
	}
	
	/**
	 * Sets the new password in all selected account modules.
	 * 
	 * @param array $input input parameters
	 */
	public function setNewPassword($input) {
		$password1 = $input['password1'];
		$password2 = $input['password2'];
		$random = $input['random'];
		$modules = $input['modules'];
		for ($m = 0; $m < sizeof($modules); $m++) {
			$modules[$m] = str_replace('password_cb_', '', $modules[$m]);
		}
		$return = array(
			'messages' => '',
			'errorsOccured' => 'false'
		);
		if ($random == 'true') {
			$password1 = generateRandomPassword();
			$return['messages'] .= StatusMessage('INFO', _('The password was set to:') . ' ' . htmlspecialchars($password1), '', array(), true);
		}
		else {
			// check if passwords match
			if ($password1 != $password2) {
				$return['messages'] .= StatusMessage('ERROR', _('Passwords are different!'), '', array(), true);
				$return['errorsOccured'] = 'true';
			}
			// check passsword stregth
			$pwdPolicyResult = checkPasswordStrength($password1);
			if ($pwdPolicyResult !== true) {
				$return['messages'] .= StatusMessage('ERROR', $pwdPolicyResult, '', array(), true);
				$return['errorsOccured'] = 'true';
			}
		}
		$forcePasswordChange = false;
		if (isset($input['forcePasswordChange']) && ($input['forcePasswordChange'] == 'true')) {
			$forcePasswordChange = true;
		}
		$sendMail = false;
		if (isset($input['sendMail']) && ($input['sendMail'] == 'true')) {
			$sendMail = true;
		}
		$return['forcePasswordChange'] = $forcePasswordChange;
		if ($return['errorsOccured'] == 'false') {
			// set new password
			foreach ($this->module as $name => $module) {
				if ($module instanceof passwordService) {
					$messages = $module->passwordChangeRequested($password1, $modules, $forcePasswordChange);
					for ($m = 0; $m < sizeof($messages); $m++) {
						if ($messages[$m][0] == 'ERROR') {
							$return['errorsOccured'] = 'true';
						}
						if (sizeof($messages[$m]) == 2) {
							$return['messages'] .= StatusMessage($messages[$m][0], $messages[$m][1], '', array(), true);
						}
						elseif (sizeof($messages[$m]) == 3) {
							$return['messages'] .= StatusMessage($messages[$m][0], $messages[$m][1], $messages[$m][2], array(), true);
						}
						elseif (sizeof($messages[$m]) == 4) {
							$return['messages'] .= StatusMessage($messages[$m][0], $messages[$m][1], $messages[$m][2], $messages[$m][3], true);
						}
					}
				}
			}
		}
		if (isLAMProVersion() && $sendMail) {
			$this->sendPasswordViaMail = $password1;
		}
		if ($return['errorsOccured'] == 'false') {
			$return['messages'] .= StatusMessage('INFO', _('The new password will be stored in the directory after you save this account.'), '', array(), true);
		}
		return $return;		
	}
	
	
	/**
	 * Prints common controls like the save button and the ou selection.
	 * 
	 * @param int $tabindex tabindex for GUI elements
	 */
	private function printCommonControls(&$tabindex) {
		$table = new htmlTable('100%');
		$leftButtonGroup = new htmlGroup();
		$leftButtonGroup->alignment = htmlElement::ALIGN_LEFT;
		// save button
		$saveButton = new htmlButton('accountContainerSaveAccount', _('Save'));
		$saveButton->setIconClass('saveButton');
		$leftButtonGroup->addElement($saveButton);
		$leftButtonGroup->addElement(new htmlSpacer('1px', null));
		// reset button
		$resetButton = new htmlButton('accountContainerReset', _('Reset changes'));
		$resetButton->setIconClass('undoButton');
		$leftButtonGroup->addElement($resetButton);
		// set password button
		if ($this->showSetPasswordButton()) {
			$leftButtonGroup->addElement(new htmlSpacer('15px', null));
			$passwordButton = new htmlButton('accountContainerPassword', _('Set password'));
			$passwordButton->setIconClass('passwordButton');
			$passwordButton->setOnClick('passwordShowChangeDialog(\'' . _('Set password') . '\', \'' . _('Ok') . '\', \''
				 . _('Cancel') . '\', \'' . _('Set random password') . '\', \'../misc/ajax.php?function=passwordChange\');');
			$leftButtonGroup->addElement($passwordButton);
		}
		$table->addElement($leftButtonGroup);
		
		$rightGroup = new htmlGroup();
		$rightGroup->alignment = htmlElement::ALIGN_RIGHT;
		// profile selection
		$profilelist = getAccountProfiles($this->type);
		if (sizeof($profilelist) > 0) {
			$rightGroup->addElement(new htmlSelect('accountContainerSelectLoadProfile', $profilelist, array($this->lastLoadedProfile)));
			$profileButton = new htmlButton('accountContainerLoadProfile', _('Load profile'));
			$profileButton->setIconClass('loadProfileButton');
			$rightGroup->addElement($profileButton);
			$rightGroup->addElement(new htmlSpacer('1px', null));
			$rightGroup->addElement(new htmlHelpLink('401'));
		}
		$table->addElement($rightGroup);
		
		parseHtml(null, $table, array(), false, $tabindex, $this->type);
		?>
		<script type="text/javascript">
			jQuery(document).ready(function() {
				var maxHeight = 0;
				jQuery('.lamEqualHeightTabContent').each(function() {
					if (jQuery(this).height() > maxHeight) {
						maxHeight = jQuery(this).height();
					};
				});
				jQuery('.lamEqualHeightTabContent').each(function() {
					jQuery(this).css({'height': maxHeight});
				});
			});
		</script>
		<?php
	}
	
	/**
	 * Returns if the page should show a button to set the password.
	 *
	 * @return boolean show or hide button
	 */
	private function showSetPasswordButton() {
		foreach ($this->module as $name => $module) {
			if (($module instanceof passwordService) && $module->managesPasswordAttributes()) {
				return true;
			}
		}
		return false;
	}
	
	/**
	 * Prints the header of the account pages.
	 */
	private function printPageHeader() {
		include '../main_header.php';
		echo '<script type="text/javascript">';
		echo 'jQuery(document).ready(function() {';
		echo '		jQuery("#inputForm").validationEngine();';
		echo '});';
		echo '</script>';
		echo "<form id=\"inputForm\" enctype=\"multipart/form-data\" action=\"edit.php\" method=\"post\">\n";		
	}
	
	/**
	 * Prints the footer of the account pages.
	 */
	private function printPageFooter() {
		echo "</form>\n";
		include '../main_footer.php';
	}
	
	/**
	 * Prints the HTML code to notify the user about the successful saving.
	 *
	 * @param array $messages array which contains status messages. Each entry is an array containing the status message parameters.
	 */
	private function printSuccessPage($messages) {
		$this->printPageHeader();
		// Show success message
		if ($this->dn_orig == '') {
			$text = _("Account was created successfully.");
		}
		else {
			$text = _("Account was modified successfully.");
		}
		echo "<div class=\"".$this->type."-bright smallPaddingContent\">";
		
		$container = new htmlTable();
		// show messages
		for ($i = 0; $i < sizeof($messages); $i++) {
			if (sizeof($messages[$i]) == 2) {
				$message = new htmlStatusMessage($messages[$i][0], $messages[$i][1]);
				$message->colspan = 10;
				$container->addElement($message, true);
			}
			else {
				$message = new htmlStatusMessage($messages[$i][0], $messages[$i][1], $messages[$i][2]);
				$message->colspan = 10;
				$container->addElement($message, true);
			}
		}
		$message = new htmlStatusMessage('INFO', _('LDAP operation successful.'), $text);
		$message->colspan = 10;
		$container->addElement($message, true);
		$container->addElement(new htmlSpacer(null, '20px'), true);
		
		$type = new $this->type();
		$buttonGroup = new htmlGroup();
		$createButton = new htmlButton('accountContainerCreateAgain', $type->LABEL_CREATE_ANOTHER_ACCOUNT);
		$createButton->setIconClass('createButton');
		$buttonGroup->addElement($createButton);
		$buttonGroup->addElement(new htmlSpacer('10px', null));
		$pdfButton = new htmlButton('accountContainerCreatePDF', _('Create PDF file'));
		$pdfButton->setIconClass('pdfButton');
		$buttonGroup->addElement($pdfButton);
		$buttonGroup->addElement(new htmlSpacer('10px', null));
		$backToListButton = new htmlButton('accountContainerBackToList', $type->LABEL_BACK_TO_ACCOUNT_LIST);
		$backToListButton->setIconClass('backButton');
		$buttonGroup->addElement($backToListButton);
		$buttonGroup->addElement(new htmlSpacer('10px', null));
		$backToEditButton = new htmlButton('accountContainerBackToEdit', _('Edit again'));
		$backToEditButton->setIconClass('editButton');
		$buttonGroup->addElement($backToEditButton);
		$container->addElement($buttonGroup, true);
		
		$tabindex = 1;
		parseHtml(null, $container, array(), false, $tabindex, $this->type);

		echo "</div>\n";
		$this->printPageFooter();
	}
	
	/**
	 * Checks if the user requested to load a profile.
	 * 
	 * @return boolean true, if profile was loaded
	 */
	private function loadProfileIfRequested() {
		if (isset($_POST['accountContainerLoadProfile']) && isset($_POST['accountContainerSelectLoadProfile'])) {
			$profile = loadAccountProfile($_POST['accountContainerSelectLoadProfile'], $this->type);
			$this->lastLoadedProfile = $_POST['accountContainerSelectLoadProfile'];
			// pass profile to each module
			$modules = array_keys($this->module);
			foreach ($modules as $module) $this->module[$module]->load_profile($profile);
			if (isset($profile['ldap_rdn'][0])) {
				if (in_array($profile['ldap_rdn'][0], getRDNAttributes($this->type))) {
					$this->rdn = $profile['ldap_rdn'][0];
				}
			}
			if (isset($profile['ldap_suffix'][0]) && ($profile['ldap_suffix'][0] != '-')) {
				$this->dnSuffix = $profile['ldap_suffix'][0];
			}
			return true;
		}
		return false;
	}
	
	/**
	 * Prints the HTML code of the module tabs.
	 */
	private function printModuleTabs() {
		// $x is used to count up tabindex
		$x=1;		
		echo '<ul class="lamEqualHeightTabContent ui-tabs-nav ui-helper-reset ui-helper-clearfix ui-widget-header ui-corner-all">';
		// Loop for each module
		for ($i=0; $i<count($this->order); $i++ ) {
			$buttonStatus = $this->module[$this->order[$i]]->getButtonStatus();
			// skip hidden buttons
			if ($buttonStatus == 'hidden') continue;
			$buttonImage = $this->module[$this->order[$i]]->getIcon();
			$activatedClass = '';
			if ($this->order[$this->current_page] == $this->order[$i]) {
				$activatedClass = ' ui-tabs-selected ui-state-active ' . $this->type . '-bright';
			}
			// print button
			echo '<li class="ui-state-default ui-corner-left' . $activatedClass . '">';
			$buttonStyle = 'background-color:transparent;;border:0px solid;';
			echo "<button style=\"" . $buttonStyle . "\" name=\"form_main_".$this->order[$i]."\"";
			echo " tabindex=$x";
			if ($buttonStatus == 'disabled') echo " disabled";
			echo ' onmouseover="jQuery(this).addClass(\'tabs-hover\');" onmouseout="jQuery(this).removeClass(\'tabs-hover\');">';
			if ($buttonImage != null) {
				echo "<img height=32 width=32 class=\"align-middle\" style=\"padding: 3px;\" alt=\"\" src=\"../../graphics/$buttonImage\">&nbsp;";
			}
			echo $this->module[$this->order[$i]]->get_alias();
			echo "&nbsp;</button>\n";
			echo "</li>\n";
			$x++;
		}
		echo '</ul>';
	}
	
	/**
	* This function checks which LDAP attributes have changed while the account was edited.
	*
	* @param array $attributes list of current LDAP attributes
	* @param array $orig list of old attributes when account was loaded
	* @return array an array which can be passed to $this->saveAccount()
	*/
	function save_module_attributes($attributes, $orig) {
		$return = array();
		$toadd = array();
		$tomodify = array();
		$torem = array();
		$notchanged = array();
		// get list of all attributes
		$attr_names = array_keys($attributes);
		$orig_names = array_keys($orig);
		// find deleted attributes (in $orig but no longer in $attributes)
		foreach ($orig_names as $i => $value) {
			if (!isset($attributes[$value])) {
				$torem[$value] = $orig[$value];
			}
		}
		// find changed attributes
		foreach ($attr_names as $i => $name) {
			// find deleted attributes
			if (isset($orig[$name]) && is_array($orig[$name])) {
				foreach ($orig[$name] as $j => $value) {
					if (is_array($attributes[$name])) {
						if (!in_array($value, $attributes[$name])) {
							if ($value != '') $torem[$name][] = $value;
						}
					}
					else if ($value != '') $torem[$name][] = $value;
				}
			}
			// find new attributes
			if (isset($attributes[$name]) && is_array($attributes[$name])) {
				foreach ($attributes[$name] as $j => $value) {
					if (isset($orig[$name]) && is_array($orig[$name])) {
						if (!in_array($value, $orig[$name]))
							if ($value != '') {
								$toadd[$name][] = $value;
							}
					}
					else if ($value != '') $toadd[$name][] = $value;
				}
			}
			// find unchanged attributes
			if (isset($orig[$name]) && is_array($orig[$name]) && is_array($attributes[$name])) {
				foreach ($attributes[$name] as $j => $value) {
					if (($value != '') && in_array($value, $orig[$name])) {
						$notchanged[$name][] = $value;
					}
				}
			}
		}
		// create modify with add and remove
		$attributes2 = array_keys($toadd);
		for ($i=0; $i<count($attributes2); $i++) {
			if (isset($torem[$attributes2[$i]]))
				if ((count($toadd[$attributes2[$i]]) > 0) && (count($torem[$attributes2[$i]]) > 0)) {
					// found attribute which should be modified
					$tomodify[$attributes2[$i]] = $toadd[$attributes2[$i]];
					// merge unchanged values
					if (isset($notchanged[$attributes2[$i]])) {
						$tomodify[$attributes2[$i]] = array_merge($tomodify[$attributes2[$i]], $notchanged[$attributes2[$i]]);
						unset($notchanged[$attributes2[$i]]);
					}
					// remove old add and remove commands
					unset($toadd[$attributes2[$i]]);
					unset($torem[$attributes2[$i]]);
				}
			}
		if (count($toadd)!=0) $return[$this->dn_orig]['add'] = $toadd;
		if (count($torem)!=0) $return[$this->dn_orig]['remove'] = $torem;
		if (count($tomodify)!=0) $return[$this->dn_orig]['modify'] = $tomodify;
		if (count($notchanged)!=0) $return[$this->dn_orig]['notchanged'] = $notchanged;
		return $return;
		}

	/**
	* Loads an LDAP account with the given DN.
	*
	* @param string $dn the DN of the account
	* @param array $infoAttributes list of additional informational attributes that are added to the LDAP attributes
	* E.g. this is used to inject the clear text password in the file upload. Informational attribute names must start with "INFO.". 
	* @return array error messages
	*/
	function load_account($dn, $infoAttributes = array()) {
		logNewMessage(LOG_DEBUG, "Edit account " . $dn);
		$this->module = array();
		$modules = $_SESSION['config']->get_AccountModules($this->type);
		$search = substr($dn, 0, strpos($dn, ','));
		$searchAttrs = array('*', '+', 'creatorsName', 'createTimestamp', 'modifiersName',
			'modifyTimestamp', 'hasSubordinates', 'pwdChangedTime');
		$result = @ldap_read($_SESSION['ldap']->server(), escapeDN($dn), escapeDN($search), $searchAttrs, 0, 0, 0, LDAP_DEREF_NEVER);
		if (!$result) {
			return array(array("ERROR", _("Unable to load LDAP entry:") . " " . htmlspecialchars($dn), ldap_error($_SESSION['ldap']->server())));
		}
		$entry = @ldap_first_entry($_SESSION['ldap']->server(), $result);
		if (!$entry) {
			return array(array("ERROR", _("Unable to load LDAP entry:") . " " . htmlspecialchars($dn), ldap_error($_SESSION['ldap']->server())));
		}
		$this->dnSuffix = extractDNSuffix($dn);
		$this->dn_orig = $dn;
		// extract RDN
		$this->rdn = extractRDNAttribute($dn);
		$attr = ldap_get_attributes($_SESSION['ldap']->server(), $entry);
		$attr = array($attr);
		cleanLDAPResult($attr);
		$attr = $attr[0];
		// fix spelling errors
		$attr = $this->fixLDAPAttributes($attr, $modules);
		// get binary attributes
		$binaryAttr = array('jpegPhoto');
		for ($i = 0; $i < sizeof($binaryAttr); $i++) {
			if (isset($attr[$binaryAttr[$i]][0])) {
				$binData = ldap_get_values_len($_SESSION['ldap']->server(), $entry, $binaryAttr[$i]);
				unset($binData['count']);
				$attr[$binaryAttr[$i]] = $binData;
			}
		}
		// add informational attributes
		$attr = array_merge($attr, $infoAttributes);
		// save original attributes
		$this->attributes_orig = $attr;

		foreach ($modules as $module) {
			if (!isset($this->module[$module])) {
				$this->module[$module] = new $module($this->type);
				$this->module[$module]->init($this->base);
			}
			$this->module[$module]->load_attributes($attr);
		}

		// sort module buttons
		$this->sortModules();
		// get titles
		$typeObject = new $this->type();
		$this->titleBarTitle = $typeObject->getTitleBarTitle($this);
		$this->titleBarSubtitle = $typeObject->getTitleBarSubtitle($this);
		return array();
	}

	/**
	 * Fixes spelling errors in the attribute names.
	 *
	 * @param array $attributes LDAP attributes
	 * @param array $modules list of active modules
	 * @return array fixed attributes
	 */
	function fixLDAPAttributes($attributes, $modules) {
		if (!is_array($attributes)) return $attributes;
		$keys = array_keys($attributes);
		// get correct object class names, aliases and attributes
		$objectClasses = array();
		$aliases = array();
		$ldapAttributesTemp = array();
		foreach ($modules as $module) {
			$moduleObj = new $module($this->type);
			$objectClasses = array_merge($objectClasses, $moduleObj->getManagedObjectClasses());
			$aliases = array_merge($aliases, $moduleObj->getLDAPAliases());
			$ldapAttributesTemp = array_merge($ldapAttributesTemp, $moduleObj->getManagedAttributes());
		}
		// build lower case attribute names
		$ldapAttributes = array();
		for ($i = 0; $i < sizeof($ldapAttributesTemp); $i++) {
			$ldapAttributes[strtolower($ldapAttributesTemp[$i])] = $ldapAttributesTemp[$i];
			unset($ldapAttributes[$i]);
		}
		$ldapAttributesKeys = array_keys($ldapAttributes);
		// convert alias names to lower case (for easier comparison)
		$aliasKeys = array_keys($aliases);
		for ($i = 0; $i < sizeof($aliasKeys); $i++) {
			if ($aliasKeys[$i] != strtolower($aliasKeys[$i])) {
				$aliases[strtolower($aliasKeys[$i])] = $aliases[$aliasKeys[$i]];
				unset($aliases[$aliasKeys[$i]]);
				$aliasKeys[$i] = strtolower($aliasKeys[$i]);
			}
		}
		// fix object classes and attributes
		for ($i = 0; $i < sizeof($keys); $i++) {
			// check object classes
			if (strtolower($keys[$i]) == 'objectclass') {
				// fix object class attribute
				if ($keys[$i] != 'objectClass') {
					$temp = $attributes[$keys[$i]];
					unset($attributes[$keys[$i]]);
					$attributes['objectClass'] = $temp;
				}
				// fix object classes
				for ($attrClass = 0; $attrClass < sizeof($attributes['objectClass']); $attrClass++) {
					for ($modClass = 0; $modClass < sizeof($objectClasses); $modClass++) {
						if (strtolower($attributes['objectClass'][$attrClass]) == strtolower($objectClasses[$modClass])) {
							if ($attributes['objectClass'][$attrClass] != $objectClasses[$modClass]) {
								unset($attributes['objectClass'][$attrClass]);
								$attributes['objectClass'][] = $objectClasses[$modClass];
							}
							break;
						}
					}
				}
			}
			else {
				// fix aliases
				if (in_array(strtolower($keys[$i]), $aliasKeys)) {
					$attributes[$aliases[strtolower($keys[$i])]] = $attributes[$keys[$i]];
					unset($attributes[$keys[$i]]);
				}
				// fix attribute names
				elseif (in_array(strtolower($keys[$i]), $ldapAttributesKeys)) {
					if ($keys[$i] != $ldapAttributes[strtolower($keys[$i])]) {
						$attributes[$ldapAttributes[strtolower($keys[$i])]] = $attributes[$keys[$i]];
						unset($attributes[$keys[$i]]);
					}
				}
			}
		}
		return $attributes;
	}

	/**
	* This function will prepare the object for a new account.
	*/
	function new_account() {
		logNewMessage(LOG_DEBUG, "New account with type " . $this->type);
		$this->isNewAccount = true;
		$this->lastLoadedProfile = 'default';
		$modules = $_SESSION['config']->get_AccountModules($this->type);
		foreach ($modules as $module) {
			$this->module[$module] = new $module($this->type);
			$this->module[$module]->init($this->base);
		}
		// sort module buttons
		$this->sortModules();
		$profile = loadAccountProfile('default', $this->type);
		// pass profile to each module
		$modules = array_keys($this->module);
		foreach ($modules as $module) $this->module[$module]->load_profile($profile);
		if (isset($profile['ldap_rdn'][0])) {
			if (in_array($profile['ldap_rdn'][0], getRDNAttributes($this->type))) {
				$this->rdn = $profile['ldap_rdn'][0];
			}
		}
		if (isset($profile['ldap_suffix'][0]) && ($profile['ldap_suffix'][0] != '-')) {
			$this->dnSuffix = $profile['ldap_suffix'][0];
		}
		// get titles
		$typeObject = new $this->type();
		$this->titleBarTitle = $typeObject->getTitleBarTitle($this);
		$this->titleBarSubtitle = $typeObject->getTitleBarSubtitle($this);
		return 0;
	}

	/**
	* This function will save an account to the LDAP database.
	*
	* @return array list of status messages
	*/
	function save_account() {
		if (!checkIfWriteAccessIsAllowed()) {
			die();
		}
		$this->finalDN = $this->dn_orig;
		$errors = array();
		$ldapUser = $_SESSION['ldap']->decrypt_login();
		$ldapUser = $ldapUser[0];
		$module = array_keys ($this->module);
		$attributes = array();
		// load attributes
		foreach ($module as $singlemodule) {
			// load changes
			$temp = $this->module[$singlemodule]->save_attributes();
			if (!is_array($temp)) $temp = array();
			// merge changes
			$DNs = array_keys($temp);
			if (is_array($temp)) $attributes = array_merge_recursive($temp, $attributes);
			for ($i=0; $i<count($DNs); $i++) {
				$ops = array_keys($temp[$DNs[$i]]);
				for ($j=0; $j<count($ops); $j++) {
					$attrs = array_keys($temp[$DNs[$i]][$ops[$j]]);
					for ($k=0; $k<count($attrs); $k++) {
						$attributes[$DNs[$i]][$ops[$j]][$attrs[$k]] = array_unique($attributes[$DNs[$i]][$ops[$j]][$attrs[$k]]);
					}
				}
			}
		}
		// build DN for new accounts and change it for existing ones if needed
		if (isset($attributes[$this->dn_orig]['modify'][$this->rdn][0])) {
			$this->finalDN = $this->rdn . '=' . $attributes[$this->dn_orig]['modify'][$this->rdn][0] . ',' . $this->dnSuffix;
			if ($this->dn_orig != $this->finalDN) {
				$attributes[$this->finalDN] = $attributes[$this->dn_orig];
				unset($attributes[$this->dn_orig]);
			}
		}
		elseif (isset($attributes[$this->dn_orig]['add'][$this->rdn][0])) {
			$this->finalDN = $this->rdn . '=' . $attributes[$this->dn_orig]['add'][$this->rdn][0] . ',' . $this->dnSuffix;
			if ($this->dn_orig != $this->finalDN) {
				$attributes[$this->finalDN] = $attributes[$this->dn_orig];
				unset($attributes[$this->dn_orig]);
			}
		}
		elseif (!$this->isNewAccount && (($this->dnSuffix != extractDNSuffix($this->dn_orig)) || ($this->rdn != extractRDNAttribute($this->dn_orig)))) {
			$this->finalDN = $this->rdn . '=' . $attributes[$this->dn_orig]['notchanged'][$this->rdn][0] . ',' . $this->dnSuffix;
			$attributes[$this->finalDN] = $attributes[$this->dn_orig];
			unset($attributes[$this->dn_orig]);
		}
		// remove pwdAccountLockedTime attribute change if also userPassword is changed (PPolicy will remove this attribute itself)
		if (isset($attributes[$this->finalDN]['modify']['userPassword']) || isset($attributes[$this->finalDN]['remove']['userPassword'])) {
			if (isset($attributes[$this->finalDN]['modify']['pwdAccountLockedTime'])) {
				unset($attributes[$this->finalDN]['modify']['pwdAccountLockedTime']);
			}
			if (isset($attributes[$this->finalDN]['remove']['pwdAccountLockedTime'])) {
				unset($attributes[$this->finalDN]['remove']['pwdAccountLockedTime']);
			}
		}
		// pre modify actions
		$prePostModifyAttributes = array();
		if (isset($attributes[$this->finalDN]) && is_array($attributes[$this->finalDN])) {
			if (isset($attributes[$this->finalDN]['notchanged'])) {
				$prePostModifyAttributes = array_merge($prePostModifyAttributes, $attributes[$this->finalDN]['notchanged']);
			}
			if (isset($attributes[$this->finalDN]['modify'])) {
				foreach ($attributes[$this->finalDN]['modify'] as $key => $value) {
					$prePostModifyAttributes[$key] = &$attributes[$this->finalDN]['modify'][$key];
				}
				foreach ($attributes[$this->finalDN]['modify'] as $key => $value) {
					$prePostModifyAttributes['MOD.' . $key] = $value;
				}
			}
			if (isset($attributes[$this->finalDN]['add'])) {
				foreach ($attributes[$this->finalDN]['add'] as $key => $value) {
					$prePostModifyAttributes[$key] = &$attributes[$this->finalDN]['add'][$key];
				}
				foreach ($attributes[$this->finalDN]['add'] as $key => $value) {
					$prePostModifyAttributes['NEW.' . $key] = $value;
				}
			}
			if (isset($attributes[$this->finalDN]['remove'])) {
				foreach ($attributes[$this->finalDN]['remove'] as $key => $value) {
					$prePostModifyAttributes['DEL.' . $key] = $value;
				}
			}
			if (isset($attributes[$this->finalDN]['info'])) {
				foreach ($attributes[$this->finalDN]['info'] as $key => $value) {
					$prePostModifyAttributes['INFO.' . $key] = $value;
				}
			}
		}
		if (!$this->isNewAccount) {
			foreach ($this->attributes_orig as $key => $value) {
				$prePostModifyAttributes['ORIG.' . $key] = $value;
			}
			$prePostModifyAttributes['ORIG.dn'][0] = $this->dn_orig;
		}
		$prePostModifyAttributes['dn'][0] = $this->finalDN;
		if (!$this->isNewAccount && ($this->finalDN != $this->dn_orig)) {
			$prePostModifyAttributes['MOD.dn'][0] = $this->finalDN;
		}
		logNewMessage(LOG_DEBUG, 'Edit page pre/postModify attributes: ' . print_r($prePostModifyAttributes, true));
		$preModifyOk = true;
		foreach ($module as $singlemodule) {
			$preModifyMessages = $this->module[$singlemodule]->preModifyActions($this->isNewAccount, $prePostModifyAttributes);
			$errors = array_merge($errors, $preModifyMessages);
			for ($i = 0; $i < sizeof($preModifyMessages); $i++) {
				if ($preModifyMessages[$i][0] == 'ERROR') {
					$preModifyOk = false;
					break;
				}
			}
		}
		if (!$preModifyOk) {
			$errors[] = array('ERROR', _('The operation was stopped because of the above errors.'));
			return $errors;
		}
		// Set to true if an real error has happened
		$stopprocessing = false;
		if (strtolower($this->finalDN) != strtolower($this->dn_orig)) {
			// move existing DN
			if ($this->dn_orig!='') {
				logNewMessage(LOG_DEBUG, 'Rename ' . $this->dn_orig . ' to ' . $this->finalDN);
				$success = ldap_rename($_SESSION['ldap']->server(), $this->dn_orig, $this->getRDN($this->finalDN), $this->getParentDN($this->finalDN), false);
				if ($success) {
					logNewMessage(LOG_NOTICE, '[' . $ldapUser .'] Renamed DN ' . $this->dn_orig . " to " . $this->finalDN);
				}
				else {
					logNewMessage(LOG_ERR, '[' . $ldapUser .'] Unable to rename DN: ' . $this->dn_orig . ' (' . ldap_error($_SESSION['ldap']->server()) . ').');
					$errors[] = array('ERROR', sprintf(_('Was unable to rename DN: %s.'), $this->dn_orig), ldap_error($_SESSION['ldap']->server()));
					$stopprocessing = true;
				}
			}
			// create complete new dn
			else {
				$attr = array();
				if (isset($attributes[$this->finalDN]['add']) && is_array($attributes[$this->finalDN]['add'])) {
					$attr = array_merge_recursive($attr, $attributes[$this->finalDN]['add']);
				}
				if (isset($attributes[$this->finalDN]['notchanged']) && is_array($attributes[$this->finalDN]['notchanged'])) {
					$attr = array_merge_recursive($attr, $attributes[$this->finalDN]['notchanged']);
				}
				if (isset($attributes[$this->finalDN]['modify']) && is_array($attributes[$this->finalDN]['modify'])) {
					$attr = array_merge_recursive($attr, $attributes[$this->finalDN]['modify']);
				}
				$success = ldap_add($_SESSION['ldap']->server(), $this->finalDN, $attr);
				if (!$success) {
					logNewMessage(LOG_ERR, '[' . $ldapUser .'] Unable to create DN: ' . $this->finalDN . ' (' . ldap_err2str(ldap_errno($_SESSION['ldap']->server())) . ').');
					$errors[] = array('ERROR', sprintf(_('Was unable to create DN: %s.'), $this->finalDN), ldap_error($_SESSION['ldap']->server()));
					$stopprocessing = true;
				}
				else {
					logNewMessage(LOG_NOTICE, '[' . $ldapUser .'] Created DN: ' . $this->finalDN);
				}
				unset($attributes[$this->finalDN]);
			}
		}
		$DNs = array_keys($attributes);
		for ($i=0; $i<count($DNs); $i++) {
			if (!$stopprocessing) {
				logNewMessage(LOG_DEBUG, 'Attribute changes for ' . $DNs[$i] . ":\n" . print_r($attributes[$DNs[$i]], true));
				// modify attributes
				if (isset($attributes[$DNs[$i]]['modify']) && !$stopprocessing) {
					$success = @ldap_mod_replace($_SESSION['ldap']->server(), $DNs[$i], $attributes[$DNs[$i]]['modify']);
					if (!$success) {
						logNewMessage(LOG_ERR, '[' . $ldapUser .'] Unable to modify attributes from DN: ' . $DNs[$i] . ' (' . ldap_err2str(ldap_errno($_SESSION['ldap']->server())) . ').');
						$errors[] = array('ERROR', sprintf(_('Was unable to modify attributes from DN: %s.'), $DNs[$i]), ldap_error($_SESSION['ldap']->server()));
						$stopprocessing = true;
					}
					else {
						logNewMessage(LOG_NOTICE, '[' . $ldapUser .'] Modified DN: ' . $DNs[$i]);
						// check if the password of the currently logged in user was changed
						$lamAdmin = $_SESSION['ldap']->decrypt_login();
						if ((strtolower($DNs[$i]) == strtolower($lamAdmin[0])) && isset($attributes[$DNs[$i]]['info']['userPasswordClearText'][0])) {
							$_SESSION['ldap']->encrypt_login($DNs[$i], $attributes[$DNs[$i]]['info']['userPasswordClearText'][0]);
						}
					}
				}
				// add attributes
				if (isset($attributes[$DNs[$i]]['add']) && !$stopprocessing) {
					$success = @ldap_mod_add($_SESSION['ldap']->server(), $DNs[$i], $attributes[$DNs[$i]]['add']);
					if (!$success) {
						logNewMessage(LOG_ERR, '[' . $ldapUser .'] Unable to add attributes to DN: ' . $DNs[$i] . ' (' . ldap_err2str(ldap_errno($_SESSION['ldap']->server())) . ').');
						$errors[] = array('ERROR', sprintf(_('Was unable to add attributes to DN: %s.'), $DNs[$i]), ldap_error($_SESSION['ldap']->server()));
						$stopprocessing = true;
					}
					else {
						logNewMessage(LOG_NOTICE, '[' . $ldapUser .'] Modified DN: ' . $DNs[$i]);
					}
				}
				// remove attributes
				if (isset($attributes[$DNs[$i]]['remove']) && !$stopprocessing) {
					$success = @ldap_mod_del($_SESSION['ldap']->server(), $DNs[$i], $attributes[$DNs[$i]]['remove']);
					if (!$success) {
						logNewMessage(LOG_ERR, '[' . $ldapUser .'] Unable to delete attributes from DN: ' . $DNs[$i] . ' (' . ldap_err2str(ldap_errno($_SESSION['ldap']->server())) . ').');
						$errors[] = array('ERROR', sprintf(_('Was unable to remove attributes from DN: %s.'), $DNs[$i]), ldap_error($_SESSION['ldap']->server()));
						$stopprocessing = true;
					}
					else {
						logNewMessage(LOG_NOTICE, '[' . $ldapUser .'] Modified DN: ' . $DNs[$i]);
					}
				}
			}
		}
		// send password mail
		if (!$stopprocessing && isLAMProVersion() && ($this->sendPasswordViaMail != null)) {
			$mailMessages = sendPasswordMail($this->sendPasswordViaMail, $prePostModifyAttributes);
			if (sizeof($mailMessages) > 0) {
				$errors = array_merge($errors, $mailMessages);
			}
			$this->sendPasswordViaMail = null;
		}
		if (!$stopprocessing) {
			// post modify actions
			foreach ($module as $singlemodule) {
				$postMessages = $this->module[$singlemodule]->postModifyActions($this->isNewAccount, $prePostModifyAttributes);
				$errors = array_merge($errors, $postMessages);
			}
		}
		return $errors;
	}

	/**
	 * Returns a list of possible PDF entries for this account.
	 *
	 * @return list of PDF entries (array(<name> => <PDF lines>))
	 */
	function get_pdfEntries() {
		$return = array();
		while(($current = current($this->module)) != null) {
			$return = array_merge($return,$current->get_pdfEntries());
			next($this->module);
		}
		$dn = $this->dn_orig;
		if (isset($this->finalDN)) {
			$dn = $this->finalDN;
		}
		$return = array_merge($return,array('main_dn' => array('<block><key>' . _('DN') . '</key><value>' . $dn . '</value></block>')));
		return $return;
	}

	/**
	* Sorts the module buttons for the account page.
	*/
	function sortModules() {
		$order = array();
		$modules = array_keys($this->module);
		$depModules = array();
		if (isset($this->order)) {
			$currentPage = $this->order[$this->current_page];
		}
		for ($i = 0; $i < sizeof($modules); $i++) {
			// insert waiting modules
			for ($w = 0; $w < sizeof($depModules); $w++) {
				$dependencies = $this->module[$depModules[$w]]->get_dependencies($this->type);
				$dependencies = $dependencies['depends'];
				$everything_found = true;
				for ($d = 0; $d < sizeof($dependencies); $d++) {
					if (!in_array($dependencies[$d], $order)) {
						$everything_found = false;
						break;
					}
				}
				// inser after depending module
				if ($everything_found) {
					$order[] = $depModules[$w];
					unset($depModules[$w]);
					$depModules = array_values($depModules);
					$w--;
				}
			}
			// check next module
			$dependencies = $this->module[$modules[$i]]->get_dependencies($this->type);
			if (is_array($dependencies['depends'])) {
				$everything_found = true;
				$dependencies = $dependencies['depends'];
				for ($d = 0; $d < sizeof($dependencies); $d++) {
					if (!in_array($dependencies[$d], $order)) {
						$everything_found = false;
						break;
					}
				}
				// remove module if dependencies are not satisfied
				if (!$everything_found) {
					$depModules[] = $modules[$i];
					unset($modules[$i]);
					$modules = array_values($modules);
					$i--;
				}
				else {
					$order[] = $modules[$i];
				}
			}
			else {
				$order[] = $modules[$i];
			}
		}
		// add modules which could not be sorted (e.g. because of cyclic dependencies)
		if (sizeof($depModules) > 0) {
			for ($i = 0; $i < sizeof($depModules); $i++) $order[] = $depModules[$i];
		}
		// move disabled modules to end
		$activeModules = array();
		$passiveModules = array();
		for ($i = 0; $i < sizeof($order); $i++) {
			if ($this->module[$order[$i]]->getButtonStatus() == 'enabled') {
				$activeModules[] = $order[$i];
			}
			else {
				$passiveModules[] = $order[$i];
			}
		}
		$this->order = array_merge($activeModules, $passiveModules);
		// check if ordering changed and current page number must be updated
		if (isset($currentPage) && ($currentPage != $this->order[$this->current_page])) {
			$this->current_page = array_search($currentPage, $this->order);
		}
	}
	
	/**
	 * Returns the RDN part of a given DN.
	 *
	 * @param String $dn DN
	 * @return String RDN
	 */
	function getRDN($dn) {
		if (($dn == "") || ($dn == null)) return "";
		$rdn = substr($dn, 0, strpos($dn, ","));
		return $rdn;
	}
	
	/**
	 * Returns the parent DN of a given DN.
	 *
	 * @param String $dn DN
	 * @return String DN
	 */
	function getParentDN($dn) {
		if (($dn == "") || ($dn == null)) return "";
		$parent = substr($dn, strpos($dn, ",") + 1);
		return $parent;		
	}
	
	/**
	 * Returns a list of OUs that exist for this account type.
	 *
	 * @return array OU list
	 */
	private function getOUs() {
		if ($this->cachedOUs != null) {
			return $this->cachedOUs;
		}
		$typeObj = new $this->type();
		$this->cachedOUs = $typeObj->getSuffixList();
		return $this->cachedOUs;
	}

	/**
	* Encrypts sensitive data before storing in session.
	*
	* @return array list of attributes which are serialized
	*/
	function __sleep() {
		// encrypt data
		$this->attributes = $_SESSION['ldap']->encrypt(serialize($this->attributes));
		$this->attributes_orig = $_SESSION['ldap']->encrypt(serialize($this->attributes_orig));
		$this->module = $_SESSION['ldap']->encrypt(serialize($this->module));
		// save all attributes
		return array_keys(get_object_vars($this));
	}

	/**
	* Decrypts sensitive data after accountContainer was loaded from session.
	*/
	function __wakeup() {
		// decrypt data
		$this->attributes = unserialize($_SESSION['ldap']->decrypt($this->attributes));
		$this->attributes_orig = unserialize($_SESSION['ldap']->decrypt($this->attributes_orig));
		$this->module = unserialize($_SESSION['ldap']->decrypt($this->module));
	}

}

/**
 * This interface needs to be implemented by all account modules which manage passwords.
 * It allows LAM to provide central password changes.
 *
 * @package modules
 */
interface passwordService {
	
	/**
	 * This method specifies if a module manages password attributes. The module alias will
	 * then appear as option in the GUI. 
	 * <br>If the module only wants to get notified about password changes then return false.
	 *
	 * @return boolean true if this module manages password attributes
	 */
	public function managesPasswordAttributes();
	
	/**
	 * Specifies if this module supports to force that a user must change his password on next login.
	 * 
	 * @return boolean force password change supported
	 */
	public function supportsForcePasswordChange();
	
	/**
	 * This function is called whenever the password should be changed. Account modules
	 * must change their password attributes only if the modules list contains their module name.
	 *
	 * @param String $password new password
	 * @param array $modules list of modules for which the password should be changed
	 * @param boolean $forcePasswordChange force the user to change his password at next login
	 * @return array list of error messages if any as parameter array for StatusMessage
	 *               e.g. return arrray(array('ERROR', 'Password change failed.'))
	 */
	public function passwordChangeRequested($password, $modules, $forcePasswordChange);

}

?>