Simple-Templates: The Demo

file1.php

<?php
class Template_Engine_Test
{
	/**
	 * 
	 * Container for the different template-engines
	 * @var object $template_engine
	 */
	public static $template_engine;

	/**
	 * 
	 * Initial some vars
	 */
	public function __construct(){
		
		// initialize the template-engine to avoid strict errors
		self::$template_engine = new stdClass();
		
	}
	
	/**
	 * 
	 * Caching for the template-classes
	 * Create a WP-Error if the template-engine could not be initialize
	 * @param string $template_engine The requested template-engine
	 * @return object The requested template-engine if available
	 */
	protected function get_template_engine( $template_engine ){
		
		$template_engine = strtolower( $template_engine );
		
		// available template-engines and the template-classes
		$available_template_engines = array(
		
			'html'	=> array( 'WP_Simple_HTML', 'WP_Simple_HTML_Templates' )
		
		);
		
		$available_template_engines = apply_filters( 'available_template_engines', $available_template_engines );
		
		// check if the requested template-engine is available. if not, try to create it
		if( ! isset( self::$template_engine->$template_engine ) ){

			if( ! isset( $available_template_engines[$template_engine] ) ){
				
				return new WP_Error( 'template_engine', 'Unknown template-engine <strong>' . $template_engine . '</strong>' );
				
			} else {
					
				$tmpl_ng	= &$available_template_engines[$template_engine];
				$class		= &$tmpl_ng[0];
				$template	= &$tmpl_ng[1];

				self::$template_engine->$template_engine = new $class( new $template );
				
			}
			
		}
		
		return self::$template_engine->$template_engine;

	} 
	
	/**
	 * 
	 * The output
	 */
	public function output( $stream ){
		
		$output = $this->get_template_engine( $stream );
		
		if( is_wp_error( $output ) )
			die( $output->get_error_message() );
		
		$output->print_headline( strtoupper( $stream ) );
		
		$list = $output->get_list( 'ol', array( 'eins', 'zwei', 'drei' ) );
		echo $list;
		
	}
	
	/**
	 * 
	 * Setup html-mode
	 */
	public function set_html(){
		
		// html is build in

	}
	
	/**
	 * 
	 * Setup xml-mode
	 */
	public function set_xml(){
		
		add_filter( 'available_template_engines', array( &$this, 'add_xml' ), 1, 0 );
		
	}
	
	/**
	 * 
	 * Add the XML-Template-Engine
	 */
	public function add_xml(){
		
		return array(
		
			'xml'	=> array( 'WP_Simple_HTML', 'WP_Simple_HTML_Templates' ),
		 
		);
		
	}

	public function set_feed(){
		
		add_filter( 'available_template_engines', array( &$this, 'add_feed' ), 1,1 );
		
	}
	
	public function add_feed( $template_engines ){
		
		$feed_engines = array(
		
			'rss'	=> array( 'WP_Simple_HTML', 'WP_Simple_HTML_Templates' ),
			'atom'	=> array( 'WP_Simple_HTML', 'WP_Simple_HTML_Templates' ),
		 
		);
		
		return array_merge( $template_engines, $feed_engines );
		
	}
	
}

$html = new Template_Engine_Test();
$html->set_html();
$html->output( 'html' );

$xml = new Template_Engine_Test();
$xml->set_xml();
$xml->output( 'xml' );

$feed = new Template_Engine_Test();
$feed->set_feed();
$feed->output( 'rss' );
$feed->output( 'atom' );

$bar = new Template_Engine_Test();
$bar->output( 'wallawalla' );