<?php
/**
 * Magento Webshopapps Module
 *
 * NOTICE OF LICENSE
 *
 * This source file is subject to the Open Software License (OSL 3.0)
 * that is bundled with this package in the file LICENSE.txt.
 * It is also available through the world-wide-web at this URL:
 * http://opensource.org/licenses/osl-3.0.php
 * If you did not receive a copy of the license and are unable to
 * obtain it through the world-wide-web, please send an email
 * to license@magentocommerce.com so we can send you a copy immediately.
 *
 * DISCLAIMER
 *
 * Do not edit or add to this file if you wish to upgrade Magento to newer
 * versions in the future. If you wish to customize Magento for your
 * needs please refer to http://www.magentocommerce.com for more information.

 *
 * @category   Webshopapps
 * @package    Webshopapps_Tracker
 * @copyright  Copyright (c) 2011 Zowta Ltd (http://www.webshopapps.com)
 * @license   www.webshopapps.com/license/license.txt
 * @author    Karen Baker <sales@webshopapps.com>
 *
 */


class Webshopapps_Tracker_Model_Order_Shipment extends Mage_Sales_Model_Order_Shipment
{


    public function getTrackUrl($title,$trackref=null, $postcode=null) {
    	if (empty($trackref)) { return; }

   	$fullUrl="";

        $carrierInstances = Mage::getSingleton('shipping/config')->getAllCarriers(
            $this->getStoreId()
        );

        foreach ($carrierInstances as $code => $carrier) {
            if ($carrier->isTrackingAvailable()) {
                if ($carrier->getConfigData('title')==$title) {
                	$manualUrl=$carrier->getConfigData('url');
		            $preUrl=$carrier->getConfigData('preurl');
		            if ($preUrl!='none') {
		            	$taggedUrl = $carrier->getCode('tracking_url',$preUrl);
		            } else {
		            	$taggedUrl = $manualUrl;
		            }	               
		            if (strpos($taggedUrl, '#SPECIAL#')) {
	            		$taggedUrl=str_replace("#SPECIAL#","",$taggedUrl);
		            	$fullUrl=str_replace("#TRACKNUM#","",$taggedUrl);
	            	} else {
	                	$fullUrl=str_replace("#TRACKNUM#",$trackref,$taggedUrl);
	                	if ($postcode && strpos($taggedUrl, '#POSTCODE#')){
			            	$fullUrl = str_replace("#POSTCODE#",$postcode,$fullUrl);
			        	}
	                }

                	break;
                }
            }
        }

	    return $fullUrl;


    }

}