<?php

	class MainEventHandler extends kEventHandler {


		/**
		* Description
		*
		* @var kDBConnection
		* @access public
		*/
		var $Conn;

		/**
		 * Adds ability to address db connection
		 *
		 * @return kDBEventHandler
		 * @access public
		 */
		function MainEventHandler()
		{
			parent::kBase();
			$this->Conn =& $this->Application->GetADODBConnection();
		}

		/**
		 * Created url part for this module
		 *
		 * @param kEvent $event
		 */
		function BuildEnv(&$event)
		{
			static  $ThemesCache = array();
			static  $LangCache = array();

			$prefix_special = $event->getPrefixSpecial();
			$url_params = $event->getEventParam('url_params');

			$query_vars = $this->Application->getUnitOption($event->Prefix, 'QueryString');

			//if pass events is off and event is not implicity passed
			if ( !$event->getEventParam('pass_events') && !isset($url_params[$prefix_special.'_event']) )
			{
				$url_params[$prefix_special.'_event'] = ''; // remove event from url if requested
				//otherwise it will use value from get_var
			}

			if(!$query_vars) return true;

			$processed_params = Array();
			foreach($query_vars as $index => $var_name)
			{
				//if value passed in params use it, otherwise use current from application
				$var_name = $prefix_special.'_'.$var_name;
				$processed_params[$var_name] =  isset( $url_params[$var_name] ) ? $url_params[$var_name] : $this->Application->GetVar($var_name);
				if ( isset($url_params[$var_name]) ) unset( $url_params[$var_name] );
			}

			$ret = '';
			$default_language_id = $this->Application->GetDefaultLanguageId();
			if( $processed_params['m_lang'] != $default_language_id )
			{
				if (!isset($LangCache[$processed_params['m_lang']])) {
					$LangCache[$processed_params['m_lang']] = $this->Conn->GetOne('SELECT PackName
											FROM '.TABLE_PREFIX.'Language
											WHERE LanguageId = '.$processed_params['m_lang']).'/';
				}
				$ret .= $LangCache[$processed_params['m_lang']];
			}

			$default_theme_id = $this->Application->GetDefaultThemeId();
			if( $processed_params['m_theme'] != $default_theme_id )
			{
				if (!isset($ThemesCache[$processed_params['m_theme']])) {
					$ThemesCache[$processed_params['m_theme']] = $this->Conn->GetOne('SELECT Name
												FROM '.TABLE_PREFIX.'Theme
												WHERE ThemeId = '.$processed_params['m_theme']).'/';
				}
				$ret .= $ThemesCache[$processed_params['m_theme']];
			}

			if( $processed_params['m_cat_id'] > 0 )
			{
				$ret .= $this->Application->getFilename('c', $processed_params['m_cat_id']).'/';
			}

			$force_page_adding = false;
			if (getArrayValue($url_params, 'reset'))
			{
				unset($url_params['reset']);
				if ($processed_params['m_cat_id'])
				{
					$processed_params['m_cat_page'] = 1;
					$force_page_adding = true;
				}
			}

			if( $processed_params['m_cat_page'] > 1 || $force_page_adding )
			{
				$ret = preg_replace('/(.*)\//', '\\1', $ret).'_'.$processed_params['m_cat_page'].'/';
			}

			$ret .= $event->getEventParam('t').'/';

			$event->setEventParam('url_params', $url_params);
			$event->setEventParam('env_string', strtolower($ret) );
		}
		
		/**
		 * Occurs, when all configs were read, allows to change config data dynamically
		 *
		 * @param kEvent $event
		 */
		function OnAfterConfigRead(&$event)
		{
			// readonly, for hooking only!
		}
	}

?>