<?php
/**
 * @version		1.0.0
 * @category	Anahita Social Engine™
 * @copyright	Copyright (C) 2008 - 2010 rmdStudio Inc. and Peerglobe Technology Inc. All rights reserved.
 * @license		GNU GPLv2 <http://www.gnu.org/licenses/old-licenses/gpl-2.0.html>
 * @link     	http://www.anahitapolis.com
 */

 
class AnUikitNodeMixin extends KMixinAbstract
{
	
	/**
	 * Return the viewer which is alwyas a person actor node
	 * @return 
	 */
	public function getViewer()
	{
		return AnModelAnahita::getSessionViewer();
	}
	
	/**
	 * Return owner using the id from the request. if $return_viewer_if_null is true, then it will return the viewer if there's no owner
	 * @return 
	 * @param $request_param String
	 * @param $return_viewer_if_null Boolean
	 */
	public function getOwner( $request_param = 'oid' , $return_viewer_if_null = true)
	{
		$owner = $this->getNode($request_param, 'lib.anahita.model.actor');
	
		if ( is_null($owner) && $return_viewer_if_null)
			$owner = $this->getViewer();
		
		return $owner;
	}
	
	/**
	 * Return medium using id from the request parameter
	 * @param $request_param
	 * @param $medium_model
	 * @return AnModelMedium
	 */
	public function getMedium( $request_param = 'id')
	{		
		return $this->getNode($request_param, 'lib.anahita.model.medium');				
	}	
		
	/**
	 * Get a node based with id passed by $request_param
	 * 
	 * @param $request_param
	 * @return mixed
	 */
	public function getNode($request_param = 'id', $base_node_identifier = 'lib.anahita.model.node')
	{
		$id    = KRequest::get("request.$request_param", 'int', 0);
		
		$node = null;
		
		if ( $id ) {
			
			try {
				
				$node = KFactory::get('lib.anahita.domain.factory.query')->get( $base_node_identifier )
					->where('id','=',$id)
					->fetch();
					
				$node = KFactory::get('lib.anahita.domain.factory.query')->get( $node->type )
					->where('id','=',$id)
					->fetch();
					
			} catch(Exception $e) {
				
				$node = null;
			}
		}
				
		return $node;		
	}	
}