ExternalCMS.php

<?php
/*
 * ExternalCMS Class
 * 
 * This class abstracts the functionality of intergrating HL cms based sites with external CMS's
 * How did this happen? Were there no other options? WHY AM I WRITING THIS?!
 * 
 * @author		Phil Sturgeon
 */
 
 class ExternalCMS
 {
 
 	private $meta_title = NULL;
 	
 	private $port = 80;
 	private $protocol = 'http://';
 
	function __construct()
 	{
 		global $smarty;
 		
 		// Cache is used throughout, may as well load it once
 		$this->cache = new Cache();
 		
 		// Grab it the once then save refference
 		$this->smarty = &$smarty;
 		
 		// Running in secure mode or not?
 		$this->isSecure( $_SERVER['SERVER_PORT'] == 443 );
 	}
 	
 	function setTitle($title)
 	{
		$this->meta_title = $title;
 	}
 	
 	function getHeader($section = NULL, $basic_mode = FALSE)
 	{
		header ('Content-type: text/html; charset=iso-8859-1');
		
		// Should we look for the full version or the basic version?
		$cache_name = $basic_mode ? 'no_header' : 'header';
		
		// Returns false if no cached file found
		$header_code = $this->_getCache( $cache_name, $section );
		if(empty($header_code))
		{
			list($header_code)=explode(
				'<!-- HEADER -->',
				$this->_fetchContent('header', $section)
			);
			
			// Add in our own metadata
			$header_code = str_replace('<!-- META DATA -->', $this->smarty->fetch('external_metadata.tpl'), $header_code);
			
			$this->_setCache($cache_name, $section, $header_code);
		}
		
		// If there is a meta title passed, override whatever is there
		if($this->meta_title !== NULL)
		{
			$header_code = preg_replace('#<title>(.+)</title>#', '<title>'.$this->meta_title.'</title>', $header_code);
		}
		
		return $header_code;
	}
	
	function getTopNav($section = NULL, $basic_mode = FALSE)
	{
		// Should we look for the full version or the basic version?
		$cache_name = $basic_mode ? 'no_header' : 'header';
		
		// Returns false if no cached file found
		$topnav_code = $this->_getCache( $cache_name, $section );
		if(empty($topnav_code))
		{
			$topnav_code = substr(
				$header_code = $this->_fetchContent('topnav', $section),
				$start = strpos($header_code, '<!-- HEADER -->'),
				strpos($header_code, '<!-- BREADCRUMBS -->') - $start
			);
			
			$this->_setCache($cache_name, $section, $topnav_code);
		}
		
		return $topnav_code;
	}
	
	function getFooter($section = NULL, $basic_mode = FALSE)
	{
		// Do we want the footer or not?
		$footer_type = $basic_mode ? 'no_footer' : 'footer';
			
		// Returns false if no cached file found
		$footer_code = $this->_getCache( $footer_type, $section );
		
		if(empty($footer_code))
		{
			list($footer_code)=array_reverse(explode(
				'<!-- START TRADING FOOTER -->',
				$this->_fetchContent($footer_type, $section)
			));
			
			$this->_setCache($footer_type, $section, $footer_code);
			
			// Add in our own metadata
			$footer_code = str_replace('<!-- ONLOAD -->', $this->smarty->fetch('external_footer.tpl'), $footer_code);
		}
		
		// Some stupid strange bug, lets just get rid of it if it exists
		$footer_code = str_replace('</html><br/>', '</html>', $footer_code);
		
		return $footer_code;
	}
	
	public function setLogin($clientnum)
	{ 
		$remoteClient = new Remote_client('internet/scripts/remote_server_user.php', 'createLoginHash', 
		 	array('clientnum'=> $clientnum)
		);
		$remoteClient-> debug(0); // Set debug level
		
		$result = $remoteClient->execute(); // Execute request and obtain response
		
		if(array_key_exists('error', $result) or !array_key_exists('hash', $result))
		{
			return FALSE;
		}
		
		setcookie(EXTERNAL_CMS_COOKIE_NAME, $result['hash'], EXTERNAL_CMS_COOKIE_EXPIRES, '/', EXTERNAL_CMS_COOKIE_DOMAIN);
		
		return TRUE;
	
	}
	
	
	public function clearLogin($clientnum)
	{
		// Already gone, thats our job done
		if(!isset($_COOKIE[EXTERNAL_CMS_COOKIE_NAME]))
		{
			return;
		}
		
		// Grab the cookie hash to check against the database
		$hash = $_COOKIE[EXTERNAL_CMS_COOKIE_NAME];
		
		// Kill the cookie (this is more important that clearing the database)
		setcookie(EXTERNAL_CMS_COOKIE_NAME, '', time()-42000, '/', EXTERNAL_CMS_COOKIE_DOMAIN);
		
		$remoteClient = new Remote_client('internet/scripts/remote_server_user.php', 'deleteLoginHash', 
		 	array('hash'=> $hash, 'clientnum'=> $clientnum)
		);
		$remoteClient->debug(0); // Set debug level
		$remoteClient->execute(); // Execute request
	}
	
	
	public function isSecure($secure = TRUE)
	{
		// Don't switch if NULL is specifically set. TRUE or FALSE or empty argument will switch answers
		if($secure !== NULL)
		{
			$this->port = $secure ? 443 : 80;
			$this->protocol = $secure ? 'https://' : 'http://';
		}
	}
	
	private function _fetchContent($item, $section)
	{
		$guess = 'EXTERNAL_CMS_'.strtoupper($section).'_'.strtoupper($item);
		
		if($section !== NULL && defined($guess))
		{
			$url = constant($guess);
		}
		
		else
		{
			$url = constant('EXTERNAL_CMS_DEFAULT_'.strtoupper($item));
		}
		
		return file_get_contents($this->protocol . $url) .'<br/>';
	}
	
	private function _getCache($name, $section)
	{
		if(!empty($section))
		{
			$name = $section . '/' . $name;
		}
		
		$this->cache->get( SITE . '/' . $name . '-' . $this->port);
	}
	
	private function _setCache($name, $section, $code)
	{
		if(!empty($section))
		{
			$name = $section . '/' . $name;
		}
		
		$this->cache->write( $code, SITE . '/' . $name . '-' . $this->port);
	}
	
 }
 
?>