<?php

//
// Open Web Analytics - An Open Source Web Analytics Framework
//
// Copyright 2006 Peter Adams. All rights reserved.
//
// Licensed under GPL v2.0 http://www.gnu.org/copyleft/gpl.html
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//
// $Id$
//

if(!class_exists('owa_observer')) {
	require_once(OWA_BASE_DIR.'owa_observer.php');
}	

/**
 * OWA Visitor Update Event handlers
 *
 * Used to update certain properties of an existing visitor entity
 * 
 * @author      Peter Adams <peter@openwebanalytics.com>
 * @copyright   Copyright &copy; 2006 Peter Adams <peter@openwebanalytics.com>
 * @license     http://www.gnu.org/copyleft/gpl.html GPL v2.0
 * @category    owa
 * @package     owa
 * @version		$Revision$	      
 * @since		owa 1.0.0
 */

class owa_visitorUpdateHandlers extends owa_observer {
    	
    /**
     * Notify Event Handler
     *
     * @param 	unknown_type $event
     * @access 	public
     */
    function notify($event) {
		
		if ( $event->get( 'visitor_id' ) ) {
			
	    	$v = owa_coreAPI::entityFactory('base.visitor');
	    	
	    	$v->load( $event->get( 'visitor_id' ) );
	    	
	    	if ( $v->wasPersisted() ) {
	    			
				$v->set('num_prior_sessions', $this->summarizePriorSessions( $v->get('id') ) );
				
				owa_coreAPI::debug("Updating... Visitor already exists.");
			
				$ret = $v->save();
					
				if ( $ret ) {
					return OWA_EHS_EVENT_HANDLED;
				} else {
					return OWA_EHS_EVENT_FAILED;
				}
			}
			
		} else {
		
			owa_coreAPI::debug("Not updating... no visitor ID present.");
			return OWA_EHS_EVENT_HANDLED;
		}
    }
    
    function summarizePriorSessions($id) {
    	
    	$ret = owa_coreAPI::summarize(array(
    			'entity'		=> 'base.session',
    			'columns'		=> array('num_prior_sessions' => 'max'),
    			'constraints'	=> array( 'visitor_id' => $id ) ) );
    	
    	return $ret['num_prior_sessions_max'];
    }
}

?>