kr-core.php

<?php
/*
Plugin Name: Knowledge Room
...
*/

if (!class_exists("KnowledgeRoom")) {
	class KnowledgeRoom {
	
		var $pluginPath;
		var $pluginUrl;	

		public function KnowledgeRoom()
		{
			$this->__construct();
		}
			
		function __construct() {
			echo "building knowledgeroom";
			// Set Plugin Path
			$this->pluginPath = dirname(__FILE__);
	
			// Set Plugin URL
			$this->pluginUrl = WP_PLUGIN_URL . '/knowledge-room';
		
			//register function to action
			add_action( 'display_knowledge_room', array( &$this, 'display_knowledge_room' ) );		
		}	
		
		function display_knowledge_room($user_ID)  {
			knowledge_room_menu();
		    $retval = '<div class="kr_content">got user id: '. $user_ID .'</div>';
			$retval .= '<br/>';	
			echo $retval;
		}
	
		function knowledge_room_menu() {
			echo 'path: '.$this->pluginPath.'<br/>';
			echo 'url: '.$this->pluginUrl.'<br/>';
			$menu = 'draw the menu <br/>';
			$menu .='<a href="http://www.google.it">link to search'.'</a> ';
			$menu .= get_link_self();
			$menu .= get_link_to_section('firstAction', 'First Action'); 
			echo $menu;
		}

		function get_link_self() {
			return '<a href="'.$this->pluginUrl.'">link to self</a> ';
		}

		function get_link_to_section($section_path, $section_title) {
			return '<a href="'.$this->pluginUrl.'/'.$section_path.'">link to '.$section_title.'</a>';	
		}
	}
	}

//*************** Admin function ***************
function knowledge_room_admin() {
	if (!current_user_can('manage_options'))  {
		wp_die( __('You do not have sufficient permissions to access this page.') );
		include('kr-admin.php');
	}
}

function kr_admin_actions() {
    add_options_page("Kroom", "Knowledge Room Configuration", 1, "Knowledge Room Configuration", "knowledge_room_admin");
}

add_action('admin_menu', 'kr_admin_actions');

new KnowledgeRoom();

?>

kr-page.php

<?php 
/*
Template Name: Knowledge Room
*/


/* This file should be included in the root BuddyPress theme directory */

get_header() ?>

	<div id="content">
		<div class="padder">

		<?php do_action( 'bp_before_blog_page' ) ?>

		<div class="page" id="blog-page" role="main">

				<h2 class="pagetitle"><?php the_title(); ?></h2>
				
				<?php do_action( 'display_knowledge_room', 666); ?>

						<?php edit_post_link( __( 'Edit this page.', 'buddypress' ), '<p class="edit-link">', '</p>'); ?>

		</div><!-- .page -->

		<?php do_action( 'bp_after_blog_page' ) ?>

		</div><!-- .padder -->
	</div><!-- #content -->

	<?php get_sidebar() ?>

<?php get_footer(); ?>