<?php
/**
* @version	$Id: users_event_handler.php 15065 2012-01-17 15:11:29Z alex $
* @package	In-Portal
* @copyright	Copyright (C) 1997 - 2009 Intechnic. All rights reserved.
* @license      GNU/GPL
* In-Portal is Open Source software.
* This means that this software may have been modified pursuant
* the GNU General Public License, and as distributed it includes
* or is derivative of works licensed under the GNU General Public License
* or other free or open source software licenses.
* See http://www.in-portal.org/license for copyright notices and details.
*/

	defined('FULL_PATH') or die('restricted access!');

	class UsersEventHandler extends kDBEventHandler
	{
		/**
		 * Allows to override standard permission mapping
		 *
		 * @return void
		 * @access protected
		 * @see kEventHandler::$permMapping
		 */
		protected function mapPermissions()
		{
			parent::mapPermissions();

			$permissions = Array (
				// admin
				'OnSetPersistantVariable'	=>	Array('self' => 'view'), // because setting to logged in user only
				'OnUpdateRootPassword'		=>	Array('self' => true),
				'OnUpdatePassword'			=>	Array('self' => true),
				'OnSaveSelected'			=>	Array ('self' => 'view'),
				'OnGeneratePassword'			=>	Array ('self' => 'view'),

				// front
				'OnRefreshForm'				=>	Array('self' => true),

				'OnForgotPassword'			=>	Array('self' => true),

				'OnSubscribeQuery'			=>	Array('self' => true),
				'OnSubscribeUser'			=>	Array('self' => true),

				'OnRecommend'				=>	Array('self' => true),

				'OnItemBuild'				=>	Array('self' => true),
				'OnMassResetSettings'	=> Array('self' => 'edit'),
				'OnMassCloneUsers'	=> Array('self' => 'add'),
			);

			$this->permMapping = array_merge($this->permMapping, $permissions);
		}

		/**
		 * Returns fields, that are not allowed to be changed from request
		 *
		 * @param Array $hash
		 * @return Array
		 * @access protected
		 */
		protected function getRequestProtectedFields($hash)
		{
			$fields = parent::getRequestProtectedFields($hash);

			$fields = array_merge($fields, Array ('PrevEmails', 'ResourceId', 'IPAddress', 'IsBanned', 'PwResetConfirm', 'PwRequestTime', 'UserType', 'OldStyleLogin'));

			if ( !$this->Application->isAdmin ) {
				$fields = array_merge($fields, Array ('Status', 'EmailVerified', 'IsBanned'));
			}

			return $fields;
		}

		/**
		 * Builds item (loads if needed)
		 *
		 * Pattern: Prototype Manager
		 *
		 * @param kEvent $event
		 * @access protected
		 */
		protected function OnItemBuild(kEvent &$event)
		{
			parent::OnItemBuild($event);

			$object =& $event->getObject();
			/* @var $object kDBItem */

			if ( $event->Special == 'forgot' || $object->getFormName() == 'registration' ) {
				$this->_makePasswordRequired($event);
			}
		}

		/**
		 * Shows only admins when required
		 *
		 * @param kEvent $event
		 * @return void
		 * @access protected
		 * @see kDBEventHandler::OnListBuild()
		 */
		protected function SetCustomQuery(kEvent &$event)
		{
			parent::SetCustomQuery($event);

			$object =& $event->getObject();
			/* @var $object kDBList */

			if ( $event->Special == 'regular' ) {
				$object->addFilter('primary_filter', '%1$s.UserType = ' . UserType::USER);
			}

			if ( $event->Special == 'admins' ) {
				$object->addFilter('primary_filter', '%1$s.UserType = ' . UserType::ADMIN);
			}

			if ( !$this->Application->isAdminUser ) {
				$object->addFilter('status_filter', '%1$s.Status = ' . STATUS_ACTIVE);
			}

			if ( $event->Special == 'online' ) {
				$object->addFilter('online_users_filter', 's.PortalUserId IS NOT NULL');
			}

			if ( $event->Special == 'group' ) {
				$group_id = $this->Application->GetVar('g_id');

				if ( $group_id !== false ) {
					// show only users, that user doesn't belong to current group
					$sql = 'SELECT PortalUserId
							FROM ' . $this->Application->GetTempName(TABLE_PREFIX . 'UserGroupRelations', 'prefix:g') . '
							WHERE GroupId = ' . (int)$group_id;
					$user_ids = $this->Conn->GetCol($sql);

					if ( $user_ids ) {
						$object->addFilter('already_member_filter', '%1$s.PortalUserId NOT IN (' . implode(',', $user_ids) . ')');
					}
				}
			}
		}

		/**
		 * Checks user permission to execute given $event
		 *
		 * @param kEvent $event
		 * @return bool
		 * @access public
		 */
		public function CheckPermission(kEvent &$event)
		{
			if ( $event->Name == 'OnLogin' || $event->Name == 'OnLoginAjax' || $event->Name == 'OnLogout' ) {
				// permission is checked in OnLogin event directly
				return true;
			}

			if ( $event->Name == 'OnResetRootPassword' ) {
				return defined('DBG_RESET_ROOT') && DBG_RESET_ROOT;
			}

			if ( $event->Name == 'OnLoginAs' ) {
				$admin_session =& $this->Application->recallObject('Session.admin');
				/* @var $admin_session Session */

				return $admin_session->LoggedIn();
			}

			if ( !$this->Application->isAdminUser ) {
				$user_id = $this->Application->RecallVar('user_id');
				$items_info = $this->Application->GetVar($event->getPrefixSpecial(true));

				if ( ($event->Name == 'OnCreate' || $event->Name == 'OnRegisterAjax') && $user_id == USER_GUEST ) {
					// "Guest" can create new users
					return true;
				}

				if ( $event->Name == 'OnUpdate' && $user_id > 0 ) {
					$user_dummy =& $this->Application->recallObject($event->Prefix . '.-item', null, Array ('skip_autoload' => true));
					/* @var $user_dummy UsersItem */

					foreach ($items_info as $id => $field_values) {
						if ( $id != $user_id ) {
							// registered users can update their record only
							return false;
						}

						$user_dummy->Load($id);
						$status_field = array_shift($this->Application->getUnitOption($event->Prefix, 'StatusField'));

						if ( $user_dummy->GetDBField($status_field) != STATUS_ACTIVE ) {
							// not active user is not allowed to update his record (he could not activate himself manually)
							return false;
						}

						if ( isset($field_values[$status_field]) && $user_dummy->GetDBField($status_field) != $field_values[$status_field] ) {
							// user can't change status by himself
							return false;
						}
					}

					return true;
				}

				if ( $event->Name == 'OnResetLostPassword' && $event->Special == 'forgot' && $user_id == USER_GUEST ) {
					// non-logged in users can reset their password, when reset code is valid
					return is_numeric($this->getPassedID($event));
				}

				if ( $event->Name == 'OnUpdate' && $user_id <= 0 ) {
					// guests are not allowed to update their record, because they don't have it :)
					return false;
				}
			}

			return parent::CheckPermission($event);
		}

		/**
		 * Handles session expiration (redirects to valid template)
		 *
		 * @param kEvent $event
		 */
		function OnSessionExpire(&$event)
		{
			$this->Application->resetCounters('UserSessions');

			// place 2 of 2 (also in kHTTPQuery::getRedirectParams)
			$admin_url_params = Array (
				'm_cat_id' => 0, // category means nothing on admin login screen
				'm_wid' => '', // remove wid, otherwise parent window may add wid to its name breaking all the frameset (for <a> targets)
				'pass' => 'm', // don't pass any other (except "m") prefixes to admin session expiration template
				'expired' => 1, // expiration mark to show special error on login screen
				'no_pass_through' => 1, // this way kApplication::HREF won't add them again
			);

			if ($this->Application->isAdmin) {
				$this->Application->Redirect('index', $admin_url_params, '', 'index.php');
			}

			if ($this->Application->GetVar('admin') == 1) {
				// Front-End showed in admin's right frame
				$session_admin =& $this->Application->recallObject('Session.admin');
				/* @var $session_admin Session */

				if (!$session_admin->LoggedIn()) {
					// front-end session created from admin session & both expired
					$this->Application->DeleteVar('admin');
					$this->Application->Redirect('index', $admin_url_params, '', 'admin/index.php');
				}
			}

			// Front-End session expiration
			$get = $this->Application->HttpQuery->getRedirectParams();
			$t = $this->Application->GetVar('t');
			$get['js_redirect'] = $this->Application->ConfigValue('UseJSRedirect');
			$this->Application->Redirect($t ? $t : 'index', $get);
		}

		/**
		 * [SCHEDULED TASK] Deletes expired sessions
		 *
		 * @param kEvent $event
		 */
		function OnDeleteExpiredSessions(&$event)
		{
			if (defined('IS_INSTALL') && IS_INSTALL) {
				return ;
			}

			$this->Application->Session->DeleteExpired();
		}

		/**
		 * Checks user data and logs it in if allowed
		 *
		 * @param kEvent $event
		 * @return void
		 * @access protected
		 */
		protected function OnLogin(&$event)
		{
			$object =& $event->getObject( Array ('form_name' => 'login') );
			/* @var $object kDBItem */

			$field_values = $this->getSubmittedFields($event);
			$object->SetFieldsFromHash($field_values, $this->getRequestProtectedFields($field_values));
			$username = $object->GetDBField('UserLogin');
			$password = $object->GetDBField('UserPassword');
			$remember_login = $object->GetDBField('UserRememberLogin') == 1;

			$user_helper =& $this->Application->recallObject('UserHelper');
			/* @var $user_helper UserHelper */

			$user_helper->event =& $event;
			$result = $user_helper->loginUser($username, $password, false, $remember_login);

			if ($result != LoginResult::OK) {
				$event->status = kEvent::erFAIL;
				$object->SetError('UserLogin', $result == LoginResult::NO_PERMISSION ? 'no_permission' : 'invalid_password');
			}

			if ( is_object($event->MasterEvent) && ($event->MasterEvent->Name == 'OnLoginAjax') ) {
				// used to insert just logged-in user e-mail on "One Step Checkout" form in "Modern Store" theme
				$user =& $user_helper->getUserObject();
				$event->SetRedirectParam('user_email', $user->GetDBField('Email'));
			}
		}

		/**
		 * Performs user login from ajax request
		 *
		 * @param kEvent $event
		 * @return void
		 * @access protected
		 */
		protected function OnLoginAjax(&$event)
		{
			$ajax_form_helper =& $this->Application->recallObject('AjaxFormHelper');
			/* @var $ajax_form_helper AjaxFormHelper */

			$ajax_form_helper->transitEvent($event, 'OnLogin'); //, Array ('do_refresh' => 1));
		}

		/**
		 * [HOOK] Auto-Logins Front-End user when "Remember Login" cookie is found
		 *
		 * @param kEvent $event
		 */
		function OnAutoLoginUser(&$event)
		{
			$remember_login_cookie = $this->Application->GetVar('remember_login');

			if (!$remember_login_cookie || $this->Application->isAdmin || $this->Application->LoggedIn()) {
				return ;
			}

			$user_helper =& $this->Application->recallObject('UserHelper');
			/* @var $user_helper UserHelper */

			$user_helper->loginUser('', '', false, false, $remember_login_cookie);
		}

		/**
		 * Called when user logs in using old in-portal
		 *
		 * @param kEvent $event
		 */
		function OnInpLogin(&$event)
		{
			$sync_manager =& $this->Application->recallObject('UsersSyncronizeManager', null, Array(), Array ('InPortalSyncronize'));
			/* @var $sync_manager UsersSyncronizeManager */

			$sync_manager->performAction('LoginUser', $event->getEventParam('user'), $event->getEventParam('pass') );

			if ($event->redirect && is_string($event->redirect)) {
				// some real template specified instead of true
				$this->Application->Redirect($event->redirect, $event->getRedirectParams());
			}
		}

		/**
		 * Called when user logs in using old in-portal
		 *
		 * @param kEvent $event
		 */
		function OnInpLogout(&$event)
		{
			$sync_manager =& $this->Application->recallObject('UsersSyncronizeManager', null, Array(), Array ('InPortalSyncronize'));
			/* @var $sync_manager UsersSyncronizeManager */

			$sync_manager->performAction('LogoutUser');
		}

		/**
		 * Performs user logout
		 *
		 * @param kEvent $event
		 * @return void
		 * @access protected
		 */
		protected function OnLogout(&$event)
		{
			$user_helper =& $this->Application->recallObject('UserHelper');
			/* @var $user_helper UserHelper */

			$user_helper->event =& $event;
			$user_helper->logoutUser();
		}

		/**
		 * Redirects user after successful registration to confirmation template (on Front only)
		 *
		 * @param kEvent $event
		 * @return void
		 * @access protected
		 */
		protected function OnAfterItemCreate(kEvent &$event)
		{
			parent::OnAfterItemCreate($event);

			$this->afterItemChanged($event);

			$this->assignToPrimaryGroup($event);
		}

		/**
		 * Performs user registration
		 *
		 * @param kEvent $event
		 * @return void
		 * @access protected
		 */
		protected function OnCreate(kEvent &$event)
		{
			if ( $this->Application->isAdmin ) {
				parent::OnCreate($event);

				return ;
			}

			$object =& $event->getObject( Array('form_name' => 'registration') );
			/* @var $object UsersItem */

			$field_values = $this->getSubmittedFields($event);
			$user_email = getArrayValue($field_values, 'Email');
			$subscriber_id = $user_email ? $this->getSubscriberByEmail($user_email) : false;

			if ( $subscriber_id ) {
				// update existing subscriber
				$object->Load($subscriber_id);
				$object->SetDBField('PrimaryGroupId', $this->Application->ConfigValue('User_NewGroup'));
				$this->Application->SetVar($event->getPrefixSpecial(true), Array ($object->GetID() => $field_values));
			}

			$object->SetFieldsFromHash($field_values, $this->getRequestProtectedFields($field_values));

			$status = $object->isLoaded() ? $object->Update() : $object->Create();

			if ( !$status ) {
				$event->status = kEvent::erFAIL;
				$event->redirect = false;
				$object->setID( (int)$object->GetID() );
			}

			$this->setNextTemplate($event, true);

			if ( ($event->status == kEvent::erSUCCESS) && $event->redirect ) {
				$this->assignToPrimaryGroup($event);

				$object->SendEmailEvents();
				$this->autoLoginUser($event);
			}
		}

		/**
		 * Processes user registration from ajax request
		 *
		 * @param kEvent $event
		 * @return void
		 * @access protected
		 */
		protected function OnRegisterAjax(kEvent &$event)
		{
			$ajax_form_helper =& $this->Application->recallObject('AjaxFormHelper');
			/* @var $ajax_form_helper AjaxFormHelper */

			$ajax_form_helper->transitEvent($event, 'OnCreate', Array ('do_refresh' => 1));
		}

		/**
		 * Returns subscribed user ID by given e-mail address
		 *
		 * @param string $email
		 * @return int|bool
		 * @access protected
		 */
		protected function getSubscriberByEmail($email)
		{
			$verify_user =& $this->Application->recallObject('u.verify', null, Array ('skip_autoload' => true));
			/* @var $verify_user UsersItem */

			$verify_user->Load($email, 'Email');

			return $verify_user->isLoaded() && $verify_user->isSubscriberOnly() ? $verify_user->GetID() : false;
		}

		/**
		 * Login user if possible, if not then redirect to corresponding template
		 *
		 * @param kEvent $event
		 */
		function autoLoginUser(&$event)
		{
			$object =& $event->getObject();
			/* @var $object UsersItem */

			if ( $object->GetDBField('Status') == STATUS_ACTIVE ) {
				$user_helper =& $this->Application->recallObject('UserHelper');
				/* @var $user_helper UserHelper */

				$user =& $user_helper->getUserObject();
				$user->Load($object->GetID());

				if ( $user_helper->checkLoginPermission() ) {
					$user_helper->loginUserById( $user->GetID() );
				}
			}
		}

		/**
		 * Set's new unique resource id to user
		 *
		 * @param kEvent $event
		 * @return void
		 * @access protected
		 */
		protected function OnBeforeItemCreate(kEvent &$event)
		{
			parent::OnBeforeItemCreate($event);

			$this->beforeItemChanged($event);

			$cs_helper =& $this->Application->recallObject('CountryStatesHelper');
			/* @var $cs_helper kCountryStatesHelper */

			$object =& $event->getObject();
			/* @var $object UsersItem */

			if ( !$object->isSubscriberOnly() ) {
				// don't check state-to-country relations for subscribers
				$cs_helper->CheckStateField($event, 'State', 'Country');
			}

			if ( $object->getFormName() != 'login' ) {
				$this->_makePasswordRequired($event);
			}

			$cs_helper->PopulateStates($event, 'State', 'Country');

			$this->setUserGroup($object);

			$user_helper =& $this->Application->recallObject('UserHelper');
			/* @var $user_helper UserHelper */

			if ( !$user_helper->checkBanRules($object) ) {
				$object->SetError('Username', 'banned');
			}

			$object->SetDBField('IPAddress', $_SERVER['REMOTE_ADDR']);

			if ( !$this->Application->isAdmin ) {
				$object->SetDBField('FrontLanguage', $this->Application->GetVar('m_lang'));
			}
		}

		/**
		 * Sets primary group of the user
		 *
		 * @param kDBItem $object
		 */
		protected function setUserGroup(&$object)
		{
			if ($object->Special == 'subscriber') {
				$object->SetDBField('PrimaryGroupId', $this->Application->ConfigValue('User_SubscriberGroup'));

				return ;
			}

			// set primary group to user
			if ( !$this->Application->isAdminUser ) {
				$group_id = $object->GetDBField('PrimaryGroupId');

				if ($group_id) {
					// check, that group is allowed for Front-End
					$sql = 'SELECT GroupId
							FROM ' . TABLE_PREFIX . 'UserGroups
							WHERE GroupId = ' . (int)$group_id . ' AND FrontRegistration = 1';
					$group_id = $this->Conn->GetOne($sql);
				}

				if (!$group_id) {
					// when group not selected OR not allowed -> use default group
					$object->SetDBField('PrimaryGroupId', $this->Application->ConfigValue('User_NewGroup'));
				}
			}
		}

		/**
		 * Assigns a user to it's primary group
		 *
		 * @param kEvent $event
		 */
		protected function assignToPrimaryGroup(&$event)
		{
			$object =& $event->getObject();
			/* @var $object kDBItem */

			$primary_group_id = $object->GetDBField('PrimaryGroupId');

			if ($primary_group_id) {
				$ug_table = TABLE_PREFIX . 'UserGroupRelations';

				if ( $object->IsTempTable() ) {
					$ug_table = $this->Application->GetTempName($ug_table, 'prefix:' . $event->Prefix);
				}

				$fields_hash = Array (
					'PortalUserId' => $object->GetID(),
					'GroupId' => $primary_group_id,
				);

				$this->Conn->doInsert($fields_hash, $ug_table, 'REPLACE');
			}
		}

		/**
		 * Set's new unique resource id to user
		 *
		 * @param kEvent $event
		 * @return void
		 * @access protected
		 */
		protected function OnAfterItemValidate(kEvent &$event)
		{
			$object =& $event->getObject();
			/* @var $object kDBItem */

			$resource_id = $object->GetDBField('ResourceId');

			if ( !$resource_id ) {
				$object->SetDBField('ResourceId', $this->Application->NextResourceId());
			}
		}

		/**
		 * Enter description here...
		 *
		 * @param kEvent $event
		 */
		function OnRecommend(&$event)
		{
			$object =& $event->getObject( Array ('form_name' => 'recommend') );
			/* @var $object kDBItem */

			$field_values = $this->getSubmittedFields($event);
			$object->SetFieldsFromHash($field_values, $this->getRequestProtectedFields($field_values));

			if ( !$object->ValidateField('RecommendEmail') ) {
				$event->status = kEvent::erFAIL;

				return ;
			}

	    	$send_params = Array (
		    	'to_email' => $object->GetDBField('RecommendEmail'),
				'to_name' => $object->GetDBField('RecommendEmail'),
	    	);

			$user_id = $this->Application->RecallVar('user_id');
			$email_event =& $this->Application->EmailEventUser('USER.SUGGEST', $user_id, $send_params);
			$email_event =& $this->Application->EmailEventAdmin('USER.SUGGEST');

			if ( $email_event->status == kEvent::erSUCCESS ) {
				$event->SetRedirectParam('pass', 'all');
				$event->redirect = $this->Application->GetVar('template_success');
			}
			else {
				$event->status = kEvent::erFAIL;
				$object->SetError('RecommendEmail', 'send_error');
			}
		}

		/**
		 * Saves address changes and mades no redirect
		 *
		 * @param kEvent $event
		 */
		function OnUpdateAddress(&$event)
		{
			$object =& $event->getObject(Array ('skip_autoload' => true));
			/* @var $object kDBItem */

			$items_info = $this->Application->GetVar($event->getPrefixSpecial(true));

			if ( $items_info ) {
				list ($id, $field_values) = each($items_info);

				if ( $id > 0 ) {
					$object->Load($id);
				}

				$object->SetFieldsFromHash($field_values, $this->getRequestProtectedFields($field_values));
				$object->setID($id);
				$object->Validate();
			}

			$cs_helper =& $this->Application->recallObject('CountryStatesHelper');
			/* @var $cs_helper kCountryStatesHelper */

			$cs_helper->PopulateStates($event, 'State', 'Country');

			$event->redirect = false;
		}

		/**
		 * Validate subscriber's email & store it to session -> redirect to confirmation template
		 *
		 * @param kEvent $event
		 */
		function OnSubscribeQuery(&$event)
		{
			$object =& $event->getObject( Array ('form_name' => 'subscription') );
			/* @var $object UsersItem */

			$field_values = $this->getSubmittedFields($event);
			$object->SetFieldsFromHash($field_values, $this->getRequestProtectedFields($field_values));

			if ( !$object->ValidateField('SubscriberEmail') ) {
				$event->status = kEvent::erFAIL;

				return ;
			}

			$user_email = $object->GetDBField('SubscriberEmail');
			$object->Load($user_email, 'Email');
			$event->SetRedirectParam('subscriber_email', $user_email);

			if ( $object->isLoaded() && $object->isSubscribed() ) {
				$event->redirect = $this->Application->GetVar('unsubscribe_template');
			}
			else {
				$event->redirect = $this->Application->GetVar('subscribe_template');
			}

			$event->SetRedirectParam('pass', 'm');
		}

		/**
		 * Subscribe/Unsubscribe user based on email stored in previous step
		 *
		 * @param kEvent $event
		 */
		function OnSubscribeUser(&$event)
		{
			$object =& $event->getObject( Array ('form_name' => 'subscription') );
			/* @var $object UsersItem */

			$user_email = $this->Application->GetVar('subscriber_email');
			$object->SetDBField('SubscriberEmail', $user_email);

			if ( !$object->ValidateField('SubscriberEmail') ) {
				$event->status = kEvent::erFAIL;

				return ;
			}

			$this->RemoveRequiredFields($object);
			$object->Load($user_email, 'Email');

			if ( $object->isLoaded() ) {
				if ( $object->isSubscribed() ) {
					if ( $event->getEventParam('no_unsubscribe') ) {
						// for customization code from FormsEventHandler
						return ;
					}

					if ( $object->isSubscriberOnly() ) {
						$temp_handler =& $this->Application->recallObject($event->Prefix . '_TempHandler', 'kTempTablesHandler');
						/* @var $temp_handler kTempTablesHandler */

						$temp_handler->DeleteItems($event->Prefix, '', Array($object->GetID()));
					}
					else {
						$this->RemoveSubscriberGroup( $object->GetID() );
					}

					$event->redirect = $this->Application->GetVar('unsubscribe_ok_template');
				}
				else {
					$this->AddSubscriberGroup($object);
					$event->redirect = $this->Application->GetVar('subscribe_ok_template');
				}
			}
			else {
				$object->generatePassword();
				$object->SetDBField('Email', $user_email);

				if ( $object->isRequired('Username') )	{
					$object->SetDBField('Username', $user_email);
				}

				$object->SetDBField('Status', STATUS_ACTIVE); // make user subscriber Active by default

				if ( $object->Create() ) {
					$this->AddSubscriberGroup($object);
					$event->redirect = $this->Application->GetVar('subscribe_ok_template');
				}
			}
		}

		/**
		 * Adding user to subscribers group
		 *
		 * @param UsersItem $object
		 */
		function AddSubscriberGroup(&$object)
		{
			if ( !$object->isSubscriberOnly() ) {
				$fields_hash = Array (
					'PortalUserId' => $object->GetID(),
					'GroupId' => $this->Application->ConfigValue('User_SubscriberGroup'),
				);

				$this->Conn->doInsert($fields_hash, TABLE_PREFIX . 'UserGroupRelations');
			}

			$this->Application->EmailEventAdmin('USER.SUBSCRIBE');
			$this->Application->EmailEventUser('USER.SUBSCRIBE', $object->GetID());
		}

		/**
		 * Removing user from subscribers group
		 *
		 * @param int $user_id
		 */
		function RemoveSubscriberGroup($user_id)
		{
			$group_id = $this->Application->ConfigValue('User_SubscriberGroup');

			$sql = 'DELETE FROM ' . TABLE_PREFIX . 'UserGroupRelations
					WHERE PortalUserId = ' . $user_id . ' AND GroupId = ' . $group_id;
			$this->Conn->Query($sql);

			$this->Application->EmailEventAdmin('USER.UNSUBSCRIBE');
			$this->Application->EmailEventUser('USER.UNSUBSCRIBE', $user_id);
		}

		/**
		 * Validates forgot password form and sends password reset confirmation e-mail
		 *
		 * @param kEvent $event
		 * @return void
		 */
		function OnForgotPassword(&$event)
		{
			$object =& $event->getObject( Array ('form_name' => 'forgot_password') );
			/* @var $object kDBItem */

			$field_values = $this->getSubmittedFields($event);
			$object->SetFieldsFromHash($field_values, $this->getRequestProtectedFields($field_values));

			$user_object =& $this->Application->recallObject('u.tmp', null, Array('skip_autoload' => true));
			/* @var $user_object UsersItem */

			$found = $allow_reset = false;
			$username = $object->GetDBField('ForgotLogin');
			$email = $object->GetDBField('ForgotEmail');

			if ( strlen($username) ) {
				$user_object->Load($username, 'Username');
			}
			elseif ( strlen($email) ) {
				$user_object->Load($email, 'Email');
			}

			if ( $user_object->isLoaded() ) {
				$min_pwd_reset_delay = $this->Application->ConfigValue('Users_AllowReset');
				$found = ($user_object->GetDBField('Status') == STATUS_ACTIVE) && strlen( $user_object->GetDBField('Password') );

				if ( !$user_object->GetDBField('PwResetConfirm') ) {
					// no reset made -> allow
					$allow_reset = true;
				}
				else {
					// reset made -> wait N minutes, then allow
					$allow_reset = adodb_mktime() > $user_object->GetDBField('PwRequestTime') + $min_pwd_reset_delay;
				}
			}

			if ($found && $allow_reset) {
				$this->Application->EmailEventUser('USER.PSWDC', $user_object->GetID());
				$event->redirect = $this->Application->GetVar('template_success');

				return ;
			}

			if ( !strlen($username) && !strlen($email) ) {
				$object->SetError('ForgotLogin', 'required');
				$object->SetError('ForgotEmail', 'required');
			}
			else {
				if ( strlen($username) ) {
					$object->SetError('ForgotLogin', $found ? 'reset_denied' : 'unknown_username');
				}

				if ( strlen($email) ) {
					$object->SetError('ForgotEmail', $found ? 'reset_denied' : 'unknown_email');
				}
			}

			if ( !$object->ValidateField('ForgotLogin') || !$object->ValidateField('ForgotEmail') ) {
				$event->status = kEvent::erFAIL;
			}
		}

		/**
		 * Updates kDBItem
		 *
		 * @param kEvent $event
		 * @return void
		 * @access protected
		 */
		protected function OnUpdate(kEvent &$event)
		{
			parent::OnUpdate($event);

			if ( !$this->Application->isAdmin ) {
				$this->setNextTemplate($event);
			}
		}

		/**
		 * Checks state against country
		 *
		 * @param kEvent $event
		 * @return void
		 * @access protected
		 */
		protected function OnBeforeItemUpdate(kEvent &$event)
		{
			parent::OnBeforeItemUpdate($event);

			$this->beforeItemChanged($event);

			$cs_helper =& $this->Application->recallObject('CountryStatesHelper');
			/* @var $cs_helper kCountryStatesHelper */

			$cs_helper->CheckStateField($event, 'State', 'Country');
			$cs_helper->PopulateStates($event, 'State', 'Country');

			$object =& $event->getObject();
			/* @var $object kDBItem */

			if ( $event->Special == 'forgot' ) {
				$object->SetDBField('PwResetConfirm', '');
				$object->SetDBField('PwRequestTime_date', NULL);
				$object->SetDBField('PwRequestTime_time', NULL);
			}

			$changed_fields = array_keys($object->GetChangedFields());

			if ( $changed_fields && !in_array('Modified', $changed_fields) ) {
				$object->SetDBField('Modified_date', adodb_mktime());
				$object->SetDBField('Modified_time', adodb_mktime());
			}

			if ( !$this->Application->isAdmin && in_array('Email', $changed_fields) && ($event->Special != 'email-restore') ) {
				$object->SetDBField('EmailVerified', 0);
			}
		}

		/**
		 * Occurs before item is changed
		 *
		 * @param kEvent $event
		 */
		function beforeItemChanged(&$event)
		{
			$object =& $event->getObject();
			/* @var $object UsersItem */

			if ( !$this->Application->isAdmin && $object->getFormName() == 'registration' ) {
				// sets new user's status based on config options
				$status_map = Array (1 => STATUS_ACTIVE, 2 => STATUS_DISABLED, 3 => STATUS_PENDING, 4 => STATUS_PENDING);
				$object->SetDBField('Status', $status_map[ $this->Application->ConfigValue('User_Allow_New') ]);

				if ( $this->Application->ConfigValue('User_Password_Auto') ) {
					$object->generatePassword( rand(5, 8) );
				}

				if ( $this->Application->ConfigValue('RegistrationCaptcha') ) {
					$captcha_helper =& $this->Application->recallObject('CaptchaHelper');
					/* @var $captcha_helper kCaptchaHelper */

					$captcha_helper->validateCode($event, false);
				}

				if ( $event->Name == 'OnBeforeItemUpdate' ) {
					// when a subscriber-only users performs normal registration, then assign him to Member group
					$this->setUserGroup($object);
				}
			}
		}

		/**
		 * Sets redirect template based on user status & user request contents
		 *
		 * @param kEvent $event
		 * @param bool $for_registration
		 */
		function setNextTemplate(&$event, $for_registration = false)
		{
			$event->SetRedirectParam('opener', 's');

			$object =& $event->getObject();
			/* @var $object UsersItem */

			$next_template = false;

			if ( $object->GetDBField('Status') == STATUS_ACTIVE && $this->Application->GetVar('next_template') ) {
				$next_template = $this->Application->GetVar('next_template');
			}
			elseif ( $for_registration ) {
				switch ( $this->Application->ConfigValue('User_Allow_New') ) {
					case 1: // Immediate
						$next_template = $this->Application->GetVar('registration_confirm_template');
						break;

					case 3: // Upon Approval
					case 4: // Email Activation
						$next_template = $this->Application->GetVar('registration_confirm_pending_template');
						break;
				}
			}

			if ($next_template) {
				$event->redirect = $next_template;
			}
		}

		/**
		 * Delete users from groups if their membership is expired
		 *
		 * @param kEvent $event
		 */
		function OnCheckExpiredMembership(&$event)
		{
			// send pre-expiration reminders: begin
			$pre_expiration = adodb_mktime() + $this->Application->ConfigValue('User_MembershipExpirationReminder') * 3600 * 24;
			$sql = 'SELECT PortalUserId, GroupId
					FROM '.TABLE_PREFIX.'UserGroupRelations
					WHERE (MembershipExpires IS NOT NULL) AND (ExpirationReminderSent = 0) AND (MembershipExpires < '.$pre_expiration.')';

			$skip_clause = $event->getEventParam('skip_clause');
			if ($skip_clause) {
				$sql .= ' AND !('.implode(') AND !(', $skip_clause).')';
			}

			$records = $this->Conn->Query($sql);
			if ($records) {
				$conditions = Array();
				foreach ($records as $record) {
					$this->Application->EmailEventUser('USER.MEMBERSHIP.EXPIRATION.NOTICE', $record['PortalUserId']);
					$this->Application->EmailEventAdmin('USER.MEMBERSHIP.EXPIRATION.NOTICE');
					$conditions[] = '(PortalUserId = '.$record['PortalUserId'].' AND GroupId = '.$record['GroupId'].')';
				}
				$sql = 'UPDATE '.TABLE_PREFIX.'UserGroupRelations
						SET ExpirationReminderSent = 1
						WHERE '.implode(' OR ', $conditions);
				$this->Conn->Query($sql);
			}
			// send pre-expiration reminders: end

			// remove users from groups with expired membership: begin
			$sql = 'SELECT PortalUserId
					FROM '.TABLE_PREFIX.'UserGroupRelations
					WHERE (MembershipExpires IS NOT NULL) AND (MembershipExpires < '.adodb_mktime().')';
			$user_ids = $this->Conn->GetCol($sql);
			if ($user_ids) {
				foreach ($user_ids as $id) {
					$this->Application->EmailEventUser('USER.MEMBERSHIP.EXPIRED', $id);
					$this->Application->EmailEventAdmin('USER.MEMBERSHIP.EXPIRED');
				}
			}
			$sql = 'DELETE FROM '.TABLE_PREFIX.'UserGroupRelations
					WHERE (MembershipExpires IS NOT NULL) AND (MembershipExpires < '.adodb_mktime().')';
			$this->Conn->Query($sql);
			// remove users from groups with expired membership: end
		}

		/**
		 * Used to keep user registration form data, while showing affiliate registration form fields
		 *
		 * @param kEvent $event
		 * @return void
		 * @access protected
		 */
		protected function OnRefreshForm(&$event)
		{
			$event->redirect = false;
			$item_info = $this->Application->GetVar( $event->getPrefixSpecial(true) );
			list($id, $field_values) = each($item_info);

			$object =& $event->getObject( Array ('skip_autoload' => true) );
			/* @var $object kDBItem */

			$object->setID($id);
			$object->IgnoreValidation = true;
			$object->SetFieldsFromHash($field_values, $this->getRequestProtectedFields($field_values));
		}

		/**
		 * Sets persistant variable
		 *
		 * @param kEvent $event
		 */
		function OnSetPersistantVariable(&$event)
		{
			$field =  $this->Application->GetVar('field');
			$value = $this->Application->GetVar('value');
			$this->Application->StorePersistentVar($field, $value);

			$force_tab = $this->Application->GetVar('SetTab');
			if ($force_tab) {
				$this->Application->StoreVar('force_tab', $force_tab);
			}
		}

		/**
		 * Return user from order by special .ord
		 *
		 * @param kEvent $event
		 * @return int
		 * @access public
		 */
		public function getPassedID(kEvent &$event)
		{
			switch ($event->Special) {
				case 'ord':
					$order =& $this->Application->recallObject('ord');
					/* @var $order OrdersItem */

					return $order->GetDBField('PortalUserId');
					break;

				case 'profile':
					$id = $this->Application->GetVar('user_id');

					if ( !$id ) {
						// if none user_id given use current user id
						$id = $this->Application->RecallVar('user_id');
					}

					return $id;
					break;

				case 'forgot':
					$user_helper =& $this->Application->recallObject('UserHelper');
					/* @var $user_helper UserHelper */

					$id = $user_helper->validateUserCode($this->Application->GetVar('user_key'), 'forgot_password');

					if ( is_numeric($id) ) {
						return $id;
					}
					break;
			}

			if ( preg_match('/^(login|register|recommend|subscribe|forgot)/', $event->Special) ) {
				// this way we can have 2+ objects stating with same special, e.g. "u.login-sidebox" and "u.login-main"
				return USER_GUEST;
			}

			return parent::getPassedID($event);
		}

		/**
		 * Allows to change root password
		 *
		 * @param kEvent $event
		 */
		function OnUpdateRootPassword(&$event)
		{
			return $this->OnUpdatePassword($event);
		}

		/**
		 * Allows to change root password
		 *
		 * @param kEvent $event
		 * @return void
		 * @access protected
		 */
		protected function OnUpdatePassword(&$event)
		{
			$items_info = $this->Application->GetVar($event->getPrefixSpecial(true));
			if ( !$items_info ) {
				return;
			}

			list ($id, $field_values) = each($items_info);
			$user_id = $this->Application->RecallVar('user_id');

			if ( $id == $user_id && ($user_id > 0 || $user_id == USER_ROOT) ) {
				$user_dummy =& $this->Application->recallObject($event->Prefix . '.-item', null, Array ('skip_autoload' => true));
				/* @var $user_dummy kDBItem */

				$user_dummy->Load($id);
				$status_field = array_shift( $this->Application->getUnitOption($event->Prefix, 'StatusField') );

				if ( $user_dummy->GetDBField($status_field) != STATUS_ACTIVE ) {
					// not active user is not allowed to update his record (he could not activate himself manually)
					return ;
				}
			}

			if ( $user_id == USER_ROOT ) {
				$object =& $event->getObject(Array ('skip_autoload' => true));
				/* @var $object UsersItem */

				// put salt to user's config
				$field_options = $object->GetFieldOptions('RootPassword');
				$field_options['salt'] = 'b38';

				// this is internal hack to allow root/root passwords for dev
				if ( $this->Application->isDebugMode() && $field_values['RootPassword'] == 'root' ) {
					$field_options['min_length'] = 4;
				}

				$object->SetFieldOptions('RootPassword', $field_options);

				$verify_options = $object->GetFieldOptions('VerifyRootPassword');
				$verify_options['salt'] = 'b38';
				$object->SetFieldOptions('VerifyRootPassword', $verify_options);

				$this->RemoveRequiredFields($object);
				$object->SetDBField('RootPassword', $this->Application->ConfigValue('RootPass'));
				$object->SetFieldsFromHash($field_values, $this->getRequestProtectedFields($field_values));
				$object->setID(-1);

				if ( $object->Validate() ) {
					// validation on, password match too
					$fields_hash = Array ('VariableValue' => $object->GetDBField('RootPassword'));
					$conf_table = $this->Application->getUnitOption('conf', 'TableName');
					$this->Conn->doUpdate($fields_hash, $conf_table, 'VariableName = "RootPass"');
					$event->SetRedirectParam('opener', 'u');
				}
				else {
					$event->status = kEvent::erFAIL;
					$event->redirect = false;
					return ;
				}
			}
			else {
				$object =& $event->getObject();
				$object->SetFieldsFromHash($field_values, $this->getRequestProtectedFields($field_values));

				if ( !$object->Update() ) {
					$event->status = kEvent::erFAIL;
					$event->redirect = false;
				}
			}

			$event->SetRedirectParam('opener', 'u');
		}

		/**
		 * Resets grid settings, remembered in each user record
		 *
		 * @param kEvent $event
		 * @return void
		 * @access protected
		 */
		protected function OnMassResetSettings(&$event)
		{
			if ( $this->Application->CheckPermission('SYSTEM_ACCESS.READONLY', 1) ) {
				$event->status = kEvent::erFAIL;
				return;
			}

			$ids = $this->StoreSelectedIDs($event);

			$default_user_id = $this->Application->ConfigValue('DefaultSettingsUserId');
			if ( in_array($default_user_id, $ids) ) {
				array_splice($ids, array_search($default_user_id, $ids), 1);
			}

			if ( $ids ) {
				$q = 'DELETE FROM ' . TABLE_PREFIX . 'UserPersistentSessionData WHERE PortalUserId IN (' . join(',', $ids) . ') AND
							 (VariableName LIKE "%_columns_%"
							 OR
							 VariableName LIKE "%_filter%"
							 OR
							 VariableName LIKE "%_PerPage%")';
				$this->Conn->Query($q);
			}

			$this->clearSelectedIDs($event);
		}

		/**
		 * Checks, that currently loaded item is allowed for viewing (non permission-based)
		 *
		 * @param kEvent $event
		 * @return bool
		 * @access protected
		 */
		protected function checkItemStatus(kEvent &$event)
		{
			$object =& $event->getObject();
			/* @var $object kDBItem */

			if ( !$object->isLoaded() ) {
				return true;
			}

			$virtual_users = Array (USER_ROOT, USER_GUEST);

			return ($object->GetDBField('Status') == STATUS_ACTIVE) || in_array($object->GetID(), $virtual_users);
		}

		/**
		 * Sends approved/declined email event on user status change
		 *
		 * @param kEvent $event
		 * @return void
		 * @access protected
		 */
		protected function OnAfterItemUpdate(kEvent &$event)
		{
			parent::OnAfterItemUpdate($event);

			$this->afterItemChanged($event);

			$object =& $event->getObject();
			/* @var $object UsersItem */

			if ( !$this->Application->isAdmin && ($event->Special != 'email-restore') ) {
				$this->sendEmailChangeEvent($event);
			}

			if ( !$this->Application->isAdmin || $object->IsTempTable() ) {
				return;
			}

			$this->sendStatusChangeEvent($object->GetID(), $object->GetOriginalField('Status'), $object->GetDBField('Status'));
		}

		/**
		 * Occurs, after item is changed
		 *
		 * @param kEvent $event
		 */
		protected function afterItemChanged(&$event)
		{
			$this->saveUserImages($event);

			$object =& $event->getObject();
			/* @var $object UsersItem */

			if ( $object->GetDBField('EmailPassword') && $object->GetDBField('Password_plain') ) {
				$email_passwords = $this->Application->RecallVar('email_passwords');
				$email_passwords = $email_passwords ? unserialize($email_passwords) : Array ();

				$email_passwords[ $object->GetID() ] = $object->GetDBField('Password_plain');
				$this->Application->StoreVar('email_passwords', serialize($email_passwords));
			}

			// update user subscription status (via my profile or new user registration)
			if ( !$this->Application->isAdmin && !$object->isSubscriberOnly() ) {
				if ( $object->GetDBField('SubscribeToMailing') && !$object->isSubscribed() ) {
					$this->AddSubscriberGroup($object);
				}
				elseif ( !$object->GetDBField('SubscribeToMailing') && $object->isSubscribed() ) {
					$this->RemoveSubscriberGroup( $object->GetID() );
				}
			}
		}

		/**
		 * Stores user's original Status before overwriting with data from temp table
		 *
		 * @param kEvent $event
		 * @return void
		 * @access protected
		 */
		protected function OnBeforeDeleteFromLive(kEvent &$event)
		{
			parent::OnBeforeDeleteFromLive($event);

			$user_id = $event->getEventParam('id');
			$user_status = $this->Application->GetVar('user_status', Array ());

			if ( $user_id > 0 ) {
				$user_status[$user_id] = $this->getUserStatus($user_id);
				$this->Application->SetVar('user_status', $user_status);
			}
		}

		/**
		 * Sends approved/declined email event on user status change (in temp tables during editing)
		 *
		 * @param kEvent $event
		 * @return void
		 * @access protected
		 */
		protected function OnAfterCopyToLive(kEvent &$event)
		{
			parent::OnAfterCopyToLive($event);

			$temp_id = $event->getEventParam('temp_id');
			$email_passwords = $this->Application->RecallVar('email_passwords');

			if ( $email_passwords ) {
				$email_passwords = unserialize($email_passwords);

				if ( isset($email_passwords[$temp_id]) ) {
					$object =& $event->getObject();
					/* @var $object kDBItem */

					$object->SwitchToLive();
					$object->Load( $event->getEventParam('id') );
					$object->SetField('Password', $email_passwords[$temp_id]);
					$object->SetField('VerifyPassword', $email_passwords[$temp_id]);

					$this->Application->EmailEventUser($temp_id > 0 ? 'USER.NEW.PASSWORD': 'USER.ADD.BYADMIN', $object->GetID());

					unset($email_passwords[$temp_id]);
					$this->Application->StoreVar('email_passwords', serialize($email_passwords));
				}
			}

			if ( $temp_id > 0 ) {
				// only send status change e-mail on user update
				$new_status = $this->getUserStatus($temp_id);
				$user_status = $this->Application->GetVar('user_status');

				$this->sendStatusChangeEvent($temp_id, $user_status[$temp_id], $new_status);
			}
		}

		/**
		 * Returns user status (active, pending, disabled) based on ID and temp mode setting
		 *
		 * @param int $user_id
		 * @return int
		 */
		function getUserStatus($user_id)
		{
			$id_field = $this->Application->getUnitOption($this->Prefix, 'IDField');
			$table_name = $this->Application->getUnitOption($this->Prefix, 'TableName');

			$sql = 'SELECT Status
					FROM '.$table_name.'
					WHERE '.$id_field.' = '.$user_id;
			return $this->Conn->GetOne($sql);
		}

		/**
		 * Sends approved/declined email event on user status change
		 *
		 * @param int $user_id
		 * @param int $prev_status
		 * @param int $new_status
		 */
		function sendStatusChangeEvent($user_id, $prev_status, $new_status)
		{
			$status_events = Array (
				STATUS_ACTIVE	=>	'USER.APPROVE',
				STATUS_DISABLED	=>	'USER.DENY',
			);
			$email_event = isset($status_events[$new_status]) ? $status_events[$new_status] : false;

			if (($prev_status != $new_status) && $email_event) {
				$this->Application->EmailEventUser($email_event, $user_id);
				$this->Application->EmailEventAdmin($email_event);
			}

			// deletes sessions from users, that are no longer active
			if (($prev_status != $new_status) && ($new_status != STATUS_ACTIVE)) {
				$sql = 'SELECT SessionKey
						FROM ' . TABLE_PREFIX . 'UserSessions
						WHERE PortalUserId = ' . $user_id;
				$session_ids = $this->Conn->GetCol($sql);

				$this->Application->Session->DeleteSessions($session_ids);
			}
		}

		/**
		 * Sends restore/validation email event on user email change
		 *
		 * @param kEvent $event
		 * @return void
		 * @access protected
		 */
		protected function sendEmailChangeEvent(kEvent &$event)
		{
			$object =& $event->getObject();
			/* @var $object UsersItem */

			$new_email = $object->GetDBField('Email');
			$prev_email = $object->GetOriginalField('Email');

			if ( !$new_email || ($prev_email == $new_email) ) {
				return;
			}

			$prev_emails = $object->GetDBField('PrevEmails');
			$prev_emails = $prev_emails ? unserialize($prev_emails) : Array ();

			$fields_hash = Array (
				'PrevEmails' => serialize($prev_emails),
				'EmailVerified' => 0,
			);

			$user_id = $object->GetID();

			if ( $prev_email ) {
				$hash = md5(TIMENOW + $user_id);
				$prev_emails[$hash] = $prev_email;
				$fields_hash['PrevEmails'] = serialize($prev_emails);

				$send_params = Array (
					'hash' => $hash,
					'to_email' => $prev_email,
					'to_name' => trim($object->GetDBField('FirstName') . ' ' . $object->GetDBField('LastName')),
				);

				$this->Application->EmailEventUser('USER.EMAIL.CHANGE.UNDO', null, $send_params);
			}

			if ( $new_email ) {
				$this->Application->EmailEventUser('USER.EMAIL.CHANGE.VERIFY', $user_id);
			}

			// direct DB update, since USER.EMAIL.CHANGE.VERIFY puts verification code in user record, that we don't want to loose
			$this->Conn->doUpdate($fields_hash, $object->TableName, 'PortalUserId = ' . $user_id);
		}

		/**
		 * OnAfterConfigRead for users
		 *
		 * @param kEvent $event
		 * @return void
		 * @access protected
		 */
		protected function OnAfterConfigRead(kEvent &$event)
		{
			parent::OnAfterConfigRead($event);

			$forms = $this->Application->getUnitOption($event->Prefix, 'Forms');
			$form_fields =& $forms['default']['Fields'];

			// 1. arrange user registration countries
			$site_helper =& $this->Application->recallObject('SiteHelper');
			/* @var $site_helper SiteHelper */

			$first_country = $site_helper->getDefaultCountry('', false);

			if ($first_country === false) {
				$first_country = $this->Application->ConfigValue('User_Default_Registration_Country');
			}

			if ($first_country) {
				// update user country dropdown sql
				$form_fields['Country']['options_sql'] = preg_replace('/ORDER BY (.*)/', 'ORDER BY IF (CountryStateId = '.$first_country.', 1, 0) DESC, \\1', $form_fields['Country']['options_sql']);
			}

			$max_username = $this->Application->ConfigValue('MaxUserName');
			$form_fields['Username']['min_len'] = $this->Application->ConfigValue('Min_UserName');
			$form_fields['Username']['max_len'] = $max_username ? $max_username : 255;

			// 2. set default user registration group
			$form_fields['PrimaryGroupId']['default'] = $this->Application->ConfigValue('User_NewGroup');

			// 3. allow avatar upload on Front-End
			$file_helper =& $this->Application->recallObject('FileHelper');
			/* @var $file_helper FileHelper */

			$file_helper->createItemFiles($event->Prefix, true); // create image fields

			if ($this->Application->isAdminUser) {
				// 4. when in administrative console, then create all users with Active status
				$form_fields['Status']['default'] = STATUS_ACTIVE;

				// 5. remove groups tab on editing forms when AdvancedUserManagement config variable not set
				if (!$this->Application->ConfigValue('AdvancedUserManagement')) {
					$edit_tab_presets = $this->Application->getUnitOption($event->Prefix, 'EditTabPresets');

					foreach ($edit_tab_presets as $preset_name => $preset_tabs) {
						if (array_key_exists('groups', $preset_tabs)) {
							unset($edit_tab_presets[$preset_name]['groups']);

							if (count($edit_tab_presets[$preset_name]) == 1) {
								// only 1 tab left -> remove it too
								$edit_tab_presets[$preset_name] = Array ();
							}
						}
					}

					$this->Application->setUnitOption($event->Prefix, 'EditTabPresets', $edit_tab_presets);
				}
			}

			if ( $this->Application->ConfigValue('RegistrationUsernameRequired') ) {
				// Username becomes required only, when it's used in registration process
				$form_fields['Username']['required'] = 1;
			}

			$this->Application->setUnitOption($event->Prefix, 'Forms', $forms);
		}

		/**
		 * OnMassCloneUsers
		 *
		 * @param kEvent $event
		 */
		function OnMassCloneUsers(&$event)
		{
			if ($this->Application->CheckPermission('SYSTEM_ACCESS.READONLY', 1)) {
				$event->status = kEvent::erFAIL;
				return;
			}

			$temp_handler =& $this->Application->recallObject($event->Prefix.'_TempHandler', 'kTempTablesHandler');
			/* @var $temp_handler kTempTablesHandler */

			$ids = $this->StoreSelectedIDs($event);
			$temp_handler->CloneItems($event->Prefix, '', $ids);
			$this->clearSelectedIDs($event);
		}

		/**
		 * When cloning users, reset password (set random)
		 *
		 * @param kEvent $event
		 * @return void
		 * @access protected
		 */
		protected function OnBeforeClone(kEvent &$event)
		{
			parent::OnBeforeClone($event);

			$object =& $event->getObject();
			/* @var $object UsersItem */

			$object->generatePassword();
			$object->SetDBField('ResourceId', 0); // this will reset it

			// change email because it should be unique
			$object->NameCopy(Array (), $object->GetID(), 'Email', 'copy%1$s.%2$s');
		}

		/**
		 * Saves selected ids to session
		 *
		 * @param kEvent $event
		 */
		function OnSaveSelected(&$event)
		{
			$this->StoreSelectedIDs($event);

			// remove current ID, otherwise group selector will use it in filters
			$this->Application->DeleteVar($event->getPrefixSpecial(true) . '_id');
		}

		/**
		 * Sets primary group of selected users
		 *
		 * @param kEvent $event
		 */
		function OnProcessSelected(&$event)
		{
			$event->SetRedirectParam('opener', 'u');
			$user_ids = $this->getSelectedIDs($event, true);
			$this->clearSelectedIDs($event);

			$dst_field = $this->Application->RecallVar('dst_field');
			if ($dst_field != 'PrimaryGroupId') {
				return ;
			}

			$group_ids = $this->Application->GetVar('g');
			$primary_group_id = $group_ids ? array_shift( array_keys($group_ids) ) : false;

			if (!$user_ids || !$primary_group_id) {
				return ;
			}

			$table_name = $this->Application->getUnitOption('ug', 'TableName');

			// 1. mark group as primary
			$sql = 'UPDATE ' . TABLE_PREFIX . 'Users
					SET PrimaryGroupId = ' . $primary_group_id . '
					WHERE PortalUserId IN (' . implode(',', $user_ids) . ')';
			$this->Conn->Query($sql);

			$sql = 'SELECT PortalUserId
					FROM ' . $table_name . '
					WHERE (GroupId = ' . $primary_group_id . ') AND (PortalUserId IN (' . implode(',', $user_ids) . '))';
			$existing_members = $this->Conn->GetCol($sql);

			// 2. add new members to a group
			$new_members = array_diff($user_ids, $existing_members);

			foreach ($new_members as $user_id) {
				$fields_hash = Array (
					'GroupId' => $primary_group_id,
					'PortalUserId' => $user_id,
				);

				$this->Conn->doInsert($fields_hash, $table_name);
			}
		}

		/**
		 * Loads user images
		 *
		 * @param kEvent $event
		 * @return void
		 * @access protected
		 */
		protected function OnAfterItemLoad(kEvent &$event)
		{
			parent::OnAfterItemLoad($event);

			// linking existing images for item with virtual fields
			$image_helper =& $this->Application->recallObject('ImageHelper');
			/* @var $image_helper ImageHelper */

			$object =& $event->getObject();
			/* @var $object UsersItem */

			$image_helper->LoadItemImages($object);

			$cs_helper =& $this->Application->recallObject('CountryStatesHelper');
			/* @var $cs_helper kCountryStatesHelper */

			$cs_helper->PopulateStates($event, 'State', 'Country');

			// get user subscription status
			$object->SetDBField('SubscribeToMailing', $object->isSubscribed() ? 1 : 0);

			if ( !$this->Application->isAdmin ) {
				$list = $this->Application->recallObject('lang.enabled', 'lang_List');
				/* @var $list kDBList */

				$list->GoFirst();
				$languages = Array ();

				while (!$list->EOL()) {
					$languages[$list->GetID()] = $list->GetField('LocalName');
					$list->GoNext();
				}

				$object->SetFieldOption('FrontLanguage', 'options', $languages);
			}
		}

		/**
		 * Save user images
		 *
		 * @param kEvent $event
		 */
		function saveUserImages(&$event)
		{
			if (!$this->Application->isAdmin) {
				$image_helper =& $this->Application->recallObject('ImageHelper');
				/* @var $image_helper ImageHelper */

				$object =& $event->getObject();
				/* @var $object kDBItem */

				// process image upload in virtual fields
				$image_helper->SaveItemImages($object);
			}
		}

		/**
		 * Makes password required for new users
		 *
		 * @param kEvent $event
		 * @return void
		 * @access protected
		 */
		protected function OnPreCreate(kEvent &$event)
		{
			parent::OnPreCreate($event);

			if ( $event->status != kEvent::erSUCCESS ) {
				return;
			}

			$object =& $event->getObject();
			/* @var $object kDBItem */

			$user_type = $this->Application->GetVar('user_type');

			if ( $user_type ) {
				$object->SetDBField('UserType', $user_type);

				if ( $user_type == UserType::ADMIN ) {
					$object->SetDBField('PrimaryGroupId', $this->Application->ConfigValue('User_AdminGroup'));
				}
			}

			if ( $this->Application->ConfigValue('User_Password_Auto') ) {
				$object->SetDBField('EmailPassword', 1);
			}

			$this->_makePasswordRequired($event);
		}

		/**
		 * Makes password required for new users
		 *
		 * @param kEvent $event
		 */
		function _makePasswordRequired(&$event)
		{
			$object =& $event->getObject();
			/* @var $object kDBItem */

			$required_fields = Array ('Password', 'Password_plain', 'VerifyPassword', 'VerifyPassword_plain');
			$object->setRequired($required_fields);
		}

		/**
		 * Load item if id is available
		 *
		 * @param kEvent $event
		 * @return void
		 * @access protected
		 */
		protected function LoadItem(kEvent &$event)
		{
			$id = $this->getPassedID($event);

			if ( $id < 0 ) {
				// when root, guest and so on

				$object =& $event->getObject();
				/* @var $object kDBItem */

				$object->Clear($id);
				return;
			}

			parent::LoadItem($event);
		}

		/**
		 * Occurs just after login (for hooking)
		 *
		 * @param kEvent $event
		 */
		function OnAfterLogin(&$event)
		{

		}

		/**
		 * Occurs just before logout (for hooking)
		 *
		 * @param kEvent $event
		 */
		function OnBeforeLogout(&$event)
		{

		}

		/**
		 * Generates password
		 *
		 * @param kEvent $event
		 */
		function OnGeneratePassword(&$event)
		{
			$event->status = kEvent::erSTOP;

			if ( $this->Application->isAdminUser ) {
				echo kUtil::generatePassword();
			}
		}

		/**
		 * Changes user's password and logges him in
		 *
		 * @param kEvent $event
		 */
		function OnResetLostPassword(&$event)
		{
			$object =& $event->getObject();
			/* @var $object kDBItem */

			$event->CallSubEvent('OnUpdate');

			if ( $event->status == kEvent::erSUCCESS ) {
				$user_helper =& $this->Application->recallObject('UserHelper');
		    	/* @var $user_helper UserHelper */

			    $user =& $user_helper->getUserObject();
				$user->Load( $object->GetID() );

				if ( $user_helper->checkLoginPermission() ) {
		    		$user_helper->loginUserById( $user->GetID() );
				}
			}
		}

		/**
		 * Generates new Root password and email it
		 *
		 * @param kEvent $event
		 * @return void
		 * @access protected
		 */
		protected function OnResetRootPassword(&$event)
		{
			$password_formatter =& $this->Application->recallObject('kPasswordFormatter');
			/* @var $password_formatter kPasswordFormatter */

			$new_root_password = kUtil::generatePassword();
			$new_root_password_encrypted = $password_formatter->EncryptPassword($new_root_password, 'b38');

			$this->Application->SetConfigValue('RootPass', $new_root_password_encrypted);
			$this->Application->EmailEventAdmin('ROOT.RESET.PASSWORD', null, Array ('password' => $new_root_password));

			$event->SetRedirectParam('reset', 1);
			$event->SetRedirectParam('pass', 'm');
		}

		/**
		 * Perform login of user, selected in Admin Console, on Front-End in a separate window
		 *
		 * @param kEvent $event
		 * @return void
		 * @access protected
		 */
		protected function OnLoginAs(kEvent &$event)
		{
			$user_helper =& $this->Application->recallObject('UserHelper');
			/* @var $user_helper UserHelper */

			$user =& $user_helper->getUserObject();
			$user->Load( $this->Application->GetVar('user_id') );

			if ( !$user->isLoaded() ) {
				return ;
			}

			if ( $user_helper->checkLoginPermission() ) {
				$user_helper->loginUserById( $user->GetID() );
			}
		}
	}
