<?php 
/**
 * Copyright 2010 Aart-Jan Boor <aart-jan@wemag.nl>
 * Author: Aart-Jan Boor
 * Wemag Advisering <http://www.wemag.nl>
 * Website: http://www.ktplugins.com
 *
 */
/**
 * KTPage child class that is designed to allow interception of page rendering
 * to adjust page output as provided by KT
 */
class KTPFwPage extends KTPage{
	var $ktp_type;
	private $triggers;
	private $initialPortletsProcessed = false;
	
	/**
	 * Constructor, runs the init_* methods of the registered triggers
	 * @param object $type [optional]
	 * @return 
	 */
	function KTPFwPage($type = 'admin'){
		$this->KTPage(); //run parent constructor
		$this->ktp_type = $type;
		
		$plugins = array();
		$oRegistry =& KTPluginRegistry::getSingleton();
		$pluginsList = $oRegistry->getPlugins();
		foreach($pluginsList as $plugin){
			$plugins[$plugin->sNamespace] = true;
		}
		
		//collect active triggers
		$res = DBUtil::getResultArray("SELECT * FROM ktp_fw_triggers");
		if(PEAR::isError($res)){
			KTPUtil::displayError("Can't read triggers: ".$res->message);
		}
		foreach($res as $trigger){
			if(isset($plugins[$trigger['plugin']])){
				if(!isset($this->triggers[$trigger['type']])){
					$this->triggers[$trigger['type']] = array();
				}
				$this->triggers[$trigger['type']][] = $trigger;
			}
		}
		
		//run required triggers
		if($type == 'admin'){
			$this->runTriggers("admin_render");
		}else{
			$this->runTriggers("render");
		}
	}
	
	function processInitialPortlets(){
		
		//run portlet triggers
		$pTemp = $this->portlets;
		$this->portlets = array();
		foreach($pTemp as $oPortlet){
			$this->addPortlet($oPortlet);
		}
		$this->initialPortletsProcessed = true;
	}
	
	/**
	 * KTPage class override. This method is called for adding a portlet
	 * to the sidebar. By intercepting this method we can change some
	 * aspects of the portlet layout, and refuse to add some portlets.
	 * Again, this method is called by KT internal (blackbox) code.
	 *
	 * @param KTPortlet $oPortlet portlet to add
	 */
	function addPortlet($oPortlet){
		if(!$this->initialPortletsProcessed){
			$this->processInitialPortlets();
		}
		if(count($this->triggers['add_portlet']) > 0){
			$this->runTriggers("add_portlet",$oPortlet);
		}else{
			parent::addPortlet($oPortlet);
		}
	}
	
	function runTriggers($type, $html = null){
		foreach($this->triggers[$type] as $trigger){
			require_once(KT_DIR.$trigger['file']);
			if($type=="add_portlet"){
				$oTrig = new $trigger['class'];
				$this->portlets = $oTrig->runTrigger($html,$this->portlets);
			}else{
				if(substr($type,-6) == 'output'){
					$html = call_user_func(array($trigger['class'], 'runTrigger'), $html);
				}else{
					call_user_func(array($trigger['class'], 'runTrigger'));
				}
			}
		}	
		return $html;
	}

	/**
	 * Renders page content and allows interceptions by KTplugins.com
	 * interceptor methods prefixed by render_
	 * @return 
	 */
	function render(){
		ob_start();
		parent::render();
		$data = ob_get_contents();
		ob_end_clean();
		
		//run required triggers
		if($this->ktp_type == 'admin'){
			$data = $this->runTriggers("admin_output",$data);
		}else{
			$data = $this->runTriggers("output",$data);
		}
		
		echo $data;
	}
	

}

?>