<?php

	define('hBEFORE',1);
	define('hAFTER',2);

	class kEventManager extends kDBBase {
		
		/**
		 * Build events registred for
		 * pseudo classes. key - pseudo class
		 * value - event name
		 *
		 * @var Array
		 * @access private
		 */
		var $buildEvents=Array();
		
		/**
		 * Holds before hooks
		 * key - prefix.event (to link to)
		 * value - hooked event info
		 *
		 * @var Array
		 * @access private
		 */
		var $beforeHooks=Array();
		
		/**
		 * Holds after hooks
		 * key - prefix.event (to link to)
		 * value - hooked event info
		 *
		 * @var Array
		 * @access private
		 */
		var $afterHooks=Array();
		
		function registerBuildEvent($pseudo_class,$build_event_name)
		{
			$this->buildEvents[$pseudo_class]=$build_event_name;
		}
		
		/**
		 * Returns build event by pseudo class
		 * name if any defined in config
		 *
		 * @param string $pseudo_class
		 * @return kEvent
		 * @access public
		 */
		function &getBuildEvent($pseudo_class)
		{
			if( !isset($this->buildEvents[$pseudo_class]) ) return false;
			
			$event = new kEvent();
			$event->Name=$this->buildEvents[$pseudo_class];
			$event->MasterEvent=null;
			return $event;
		}
		
		/**
		 * Allows to process any type of event
		 *
		 * @param kEvent $event
		 * @access public
		 */
		function HandleEvent(&$event)
		{
			$event_handler =& $this->Application->recallObject($event->Prefix.'_EventHandler');
			$event_handler->processEvent(&$event);
		}
		
		function getTemplateName($querystring_template)
		{
			$t_from_post=$this->Application->GetVar('t');
			$t=$t_from_post?$t_from_post:$querystring_template;
			return $t;
		}
		
		function ProcessRequest()
		{
			// env=SID:TEMPLATE:m-1-1-1-1:l0-0-0:n-0-0-0:bb-0-0-1-1-1-0
			
			// 1. process QueryString
			$env_var =& $this->Application->GetVar(ENV_VAR_NAME);
			$query_maps=Array();
			
			if($env_var)
			{
				$parts=explode(':',$env_var);
				
				// Save Session ID
				$sid=array_shift($parts);
				if($sid) $this->Application->SetVar('sid',$sid);
				
				// Save Template Name
				$t=$this->getTemplateName( array_shift($parts) );
				if(!$t) $t='index';
				$this->Application->SetVar('t',$t);
				
				if($parts)
				{
					foreach($parts as $mixed_part)
					{
						$mixed_part=explode('-',$mixed_part);
						$prefix_special=array_shift($mixed_part); // l.pick, l
						list($prefix)=explode('.',$prefix_special);
						
						$query_maps[$prefix_special]=$this->Application->getUnitOption($prefix,'QueryString');
						foreach($query_maps[$prefix_special] as $index => $var_name)
						{
							// l_id, l_page, l_bla-bla-bla
							$this->Application->SetVar($prefix_special.'_'.$var_name,$mixed_part[$index-1]);
						}
					}
				}
			}
			else 
			{
				$t=$this->getTemplateName('index');
				$this->Application->SetVar('t',$t);
			}
			
			// 1. get events from $_POST
			$events=$this->Application->GetVar('events');
			if($events===false) $events=Array();
			// 2. if nothing there, then try to find them in $_GET
			if($query_maps && !$events) 
			{
				// if we got $_GET type submit (links, not javascript)
				foreach($query_maps as $prefix_special => $query_map)
				{
					$query_map=array_flip($query_map);
					if(isset($query_map['event']))
					{
						$events[$prefix_special]=$this->Application->GetVar($prefix_special.'_event');	
					}
				}
			}
			
			//print_pre($events);
			$t=$this->Application->GetVar('t');
			foreach($events as $prefix_special => $event_name)
			{
				if(!$event_name) continue;
				$event = new kEvent();
				$event->Name=$event_name;
				$event->Prefix_Special=$prefix_special;
				
				$prefix_special=explode('.',$prefix_special);
				$event->Prefix=$prefix_special[0];
				$event->Special=isset($prefix_special[1])?$prefix_special[1]:'';
				
				$event->redirect=$this->Application->RecallVar('redirect_to');
				$this->HandleEvent(&$event);
			}
		}
		
		function registerHook($hookto_unit, $hookto_event_name, $mode, $do_unit, $do_event_name)
		{
			
			
		}
		
		function processHooks(&$event, $mode)
		{
			
			
		}
		
		/**
		 * Set's new event for $prefix_special
		 * passed
		 *
		 * @param string $prefix_special
		 * @param string $event_name
		 * @access public
		 */
		function setEvent($prefix_special,$event_name)
		{
			$actions =& $this->Application->recallObject('kActions');
			$actions->Set('events['.$prefix_special.']',$event_name);
		}

	}


?>