Index: branches/5.2.x/core/units/configuration/configuration_event_handler.php
===================================================================
diff -u -N -r14787 -r14934
--- branches/5.2.x/core/units/configuration/configuration_event_handler.php	(.../configuration_event_handler.php)	(revision 14787)
+++ branches/5.2.x/core/units/configuration/configuration_event_handler.php	(.../configuration_event_handler.php)	(revision 14934)
@@ -1,6 +1,6 @@
 <?php
 /**
-* @version	$Id: configuration_event_handler.php 14787 2011-11-23 13:25:06Z alex $
+* @version	$Id: configuration_event_handler.php 14934 2011-12-28 18:06:28Z alex $
 * @package	In-Portal
 * @copyright	Copyright (C) 1997 - 2009 Intechnic. All rights reserved.
 * @license      GNU/GPL
@@ -16,6 +16,17 @@
 
 	class ConfigurationEventHandler extends kDBEventHandler  {
 
+		function mapPermissions()
+		{
+			parent::mapPermissions();
+
+			$permissions = Array (
+				'OnGenerateMaintenancePage' => Array ('self' => 'add|edit'),
+			);
+
+			$this->permMapping = array_merge($this->permMapping, $permissions);
+		}
+
 		/**
 		 * Changes permission section to one from REQUEST, not from config
 		 *
@@ -136,13 +147,24 @@
 				}
 			}
 
-			if ( $object->GetDBField('VariableName') == 'AdminConsoleInterface' ) {
+			$variable_name = $object->GetDBField('VariableName');
+			$new_value = $object->GetDBField('VariableValue');
+
+			if ( $variable_name == 'AdminConsoleInterface' ) {
 				$can_change = $this->Application->ConfigValue('AllowAdminConsoleInterfaceChange');
 
-				if ( ($object->GetDBField('VariableValue') != $object->GetOriginalField('VariableValue')) && !$can_change ) {
+				if ( ($new_value != $object->GetOriginalField('VariableValue')) && !$can_change ) {
 					$object->SetError('VariableValue', 'not_allowed', 'la_error_OperationNotAllowed');
 				}
 			}
+			elseif ( $variable_name == 'HardMaintenanceTemplate' ) {
+				$compile = $event->MasterEvent->getEventParam('compile_maintenance_template');
+				$compile = $compile || $new_value != $object->GetOriginalField('VariableValue');
+
+				if ( $compile && !$this->generateMaintenancePage($new_value) ) {
+					$object->SetError('VariableValue', 'template_file_missing', 'la_error_TemplateFileMissing');
+				}
+			}
 		}
 
 		/**
@@ -172,6 +194,9 @@
 			if ( $object->GetDBField('VariableValue') != $object->GetOriginalField('VariableValue') ) {
 				$changed[] = $variable_name;
 				$this->Application->SetVar($event->getPrefixSpecial() . '_changed', $changed);
+
+				// update value in cache, so other code (during this script run) would use new value
+				$this->Application->SetConfigValue($variable_name, $object->GetDBField('VariableValue'), true);
 			}
 
 			if ( $variable_name == 'Require_AdminSSL' || $variable_name == 'AdminSSL_URL' ) {
@@ -289,4 +314,44 @@
 			$event->SetRedirectParam('opener', 'u');
 		}
 
+		/**
+		 * Generates maintenance page
+		 *
+		 * @param kEvent $event
+		 * @return void
+		 * @access protected
+		 */
+		protected function OnGenerateMaintenancePage(kEvent &$event)
+		{
+			$event->setEventParam('compile_maintenance_template', 1);
+
+			$event->CallSubEvent('OnUpdate');
+		}
+
+		/**
+		 * Generates HTML version of hard maintenance template
+		 *
+		 * @param string $template
+		 * @return bool
+		 * @access protected
+		 */
+		protected function generateMaintenancePage($template = null)
+		{
+			if ( !isset($template) ) {
+				$template = $this->Application->ConfigValue('HardMaintenanceTemplate');
+			}
+
+			$curl_helper =& $this->Application->recallObject('CurlHelper');
+			/* @var $curl_helper kCurlHelper */
+
+			$html = $curl_helper->Send($this->Application->BaseURL() . '?t=' . $template);
+
+			if ( $curl_helper->isGoodResponseCode() ) {
+				file_put_contents(WRITEABLE . DIRECTORY_SEPARATOR . 'maintenance.html', $html);
+
+				return true;
+			}
+
+			return false;
+		}
 	}
\ No newline at end of file