Index: trunk/core/kernel/application.php
===================================================================
diff -u -r7635 -r7855
--- trunk/core/kernel/application.php	(.../application.php)	(revision 7635)
+++ trunk/core/kernel/application.php	(.../application.php)	(revision 7855)
@@ -320,6 +320,11 @@
 
 	function refreshModuleInfo()
 	{
+		if (defined('IS_INSTALL') && IS_INSTALL && !$this->TableFound('Modules')) {
+			$this->registerModuleConstants();
+			return false;
+		}
+		
 		$modules_helper =& $this->recallObject('ModulesHelper');
 		$sql = 'SELECT *
 				FROM '.TABLE_PREFIX.'Modules
@@ -365,7 +370,7 @@
 
 		$path = $this->GetFrontThemePath();
 		if ($path === false) {
-			$this->ApplicationDie('No Primary Theme Selected or Current Theme is Unknonw or Disabled');
+			$this->ApplicationDie('No Primary Theme Selected or Current Theme is Unknown or Disabled');
 		}
 		safeDefine('THEMES_PATH', $path);
 		/*
@@ -504,8 +509,8 @@
 		$this->registerClass('Template', KERNEL_PATH.'/parser/template.php');
 		$this->registerClass('TemplateParser', KERNEL_PATH.'/parser/template_parser.php',null, 'kDBTagProcessor');
 
-		$this->registerClass('kEmailMessage', KERNEL_PATH.'/utility/email.php');
-		$this->registerClass('kSmtpClient', KERNEL_PATH.'/utility/smtp_client.php');
+		$this->registerClass('kEmailSendingHelper', KERNEL_PATH.'/utility/email_send.php', 'EmailSender', Array('kHelper'));
+		$this->registerClass('kSocket', KERNEL_PATH.'/utility/socket.php', 'Socket');
 
 		if (file_exists(MODULES_PATH.'/in-commerce/units/currencies/currency_rates.php')) {
 			$this->registerClass('kCurrencyRates', MODULES_PATH.'/in-commerce/units/currencies/currency_rates.php');
@@ -713,9 +718,6 @@
 			if (!$this->TemplatesCache->TemplateExists($t) && !$this->IsAdmin()) {
 				$t = $cms_handler->GetDesignTemplate();
 			}
-			/*else {
-				$cms_handler->SetCatByTemplate();
-			}*/
 		}
 
 
@@ -1013,7 +1015,7 @@
 
 	function ProcessParsedTag($prefix, $tag, $params)
 	{
-		
+
 		$a_tag = new Tag('',$this->Parser);
 		$a_tag->Tag = $tag;
 		$tmp=$this->Application->processPrefix($prefix);
@@ -1587,11 +1589,13 @@
 		}
 
 		ob_end_flush();
+		
 		// session expiration is called from session initialization,
 		// that's why $this->Session may be not defined here
-		if (is_object($this->Session)) {
-			$this->Session->SaveData();
-		}
+		$session =& $this->Application->recallObject('Session');
+		/* @var $session Session */
+		
+		$session->SaveData();
 		exit;
 	}
 
@@ -1664,7 +1668,7 @@
 	}
 
 
-	
+
 	function LoadCache() {
 		$cache_key = $this->GetVar('t').$this->GetVar('m_theme').$this->GetVar('m_lang').$this->IsAdmin();
 		$query = sprintf("SELECT PhraseList, ConfigVariables FROM %s WHERE Template = %s",
@@ -1724,6 +1728,10 @@
 		$res = isset($this->ConfigHash[$name]) ? $this->ConfigHash[$name] : false;
 		if ($res !== false) return $res;
 
+		if (defined('IS_INSTALL') && IS_INSTALL && !$this->TableFound('ConfigurationValues')) {
+			return false;
+		}
+		
 		$res = $this->Conn->GetRow('SELECT VariableId, VariableValue FROM '.TABLE_PREFIX.'ConfigurationValues WHERE VariableName = '.$this->Conn->qstr($name));
 		if ($res) {
 			$this->ConfigHash[$name] = $res['VariableValue'];
@@ -1918,8 +1926,7 @@
 	function isDebugMode($check_debugger = true)
 	{
 		$debug_mode = defined('DEBUG_MODE') && DEBUG_MODE;
-		if($check_debugger)
-		{
+		if ($check_debugger) {
 			$debug_mode = $debug_mode && is_object($this->Debugger);
 		}
 		return $debug_mode;
@@ -2067,7 +2074,6 @@
 		if ( isset($this->Debugger) )
 		{
 			$errorLevel = constOn('DBG_SQL_FAILURE') && !defined('IS_INSTALL') ? E_USER_ERROR : E_USER_WARNING;
-			$this->Debugger->dumpVars($_REQUEST);
 			$this->Debugger->appendTrace();
 
 			$error_msg = '<span class="debug_error">'.$msg.' ('.$code.')</span><br><a href="javascript:$Debugger.SetClipboard(\''.htmlspecialchars($sql).'\');"><b>SQL</b></a>: '.$this->Debugger->formatSQL($sql);
@@ -2191,7 +2197,8 @@
 	 */
 	function &EmailEventAdmin($email_event_name, $to_user_id = -1, $send_params = false)
 	{
-		return $this->EmailEvent($email_event_name, 1, $to_user_id, $send_params);
+		$event =& $this->EmailEvent($email_event_name, 1, $to_user_id, $send_params);
+		return $event;
 	}
 
 	/**
@@ -2204,7 +2211,8 @@
 	 */
 	function &EmailEventUser($email_event_name, $to_user_id = -1, $send_params = false)
 	{
-		return $this->EmailEvent($email_event_name, 0, $to_user_id, $send_params);
+		$event =& $this->EmailEvent($email_event_name, 0, $to_user_id, $send_params);
+		return $event;
 	}
 
 	/**
@@ -2233,16 +2241,14 @@
 		return $event;
 	}
 
-
+	/**
+	 * Allows to check if user in this session is logged in or not
+	 *
+	 * @return bool
+	 */
 	function LoggedIn()
 	{
-		$user_id = $this->Application->RecallVar('user_id');
-
-		$ret = $user_id > 0;
-		if ($this->IsAdmin() && ($user_id == -1)) {
-			$ret = true;
-		}
-		return $ret;
+		return $this->Session->LoggedIn();
 	}
 
 	/**
@@ -2415,7 +2421,52 @@
 		}
 		return $user_groups;
 	}
+	
 
+	/**
+	 * Allows to detect if page is browsed by spider (293 agents supported)
+	 *
+	 * @return bool
+	 */
+	function IsSpider()
+	{
+		static $is_spider = null;
+		
+		if (!isset($is_spider)) {
+			$user_agent = trim($_SERVER['HTTP_USER_AGENT']);
+			$robots = file(FULL_PATH.'/core/robots_list.txt');
+			foreach ($robots as $robot_info) {
+				$robot_info = explode("\t", $robot_info, 3);
+				if ($user_agent == trim($robot_info[2])) {
+					$is_spider = true;
+					break;
+				}
+			}
+		}
+		
+		return $is_spider;
+	}
+	
+	/**
+	 * Allows to detect table's presense in database
+	 *
+	 * @param string $table_name
+	 * @return bool
+	 */
+	function TableFound($table_name)
+	{
+		static $table_found = Array();
+		
+		if (!preg_match('/^'.preg_quote(TABLE_PREFIX, '/').'(.*)/', $table_name)) {
+			$table_name = TABLE_PREFIX.$table_name;
+		}
+		
+		if (!isset($table_found[$table_name])) {
+			$table_found[$table_name] = $this->Conn->Query('SHOW TABLES LIKE "'.$table_name.'"');
+		}
+		
+		return $table_found[$table_name];
+	}
 }
 
 ?>
\ No newline at end of file