<?php

/**

 * Zend Framework

 *

 * LICENSE

 *

 * This source file is subject to the new BSD license that is bundled

 * with this package in the file LICENSE.txt.

 * It is also available through the world-wide-web at this URL:

 * http://framework.zend.com/license/new-bsd

 * 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@zend.com so we can send you a copy immediately.

 *

 * @category   Zend

 * @package    Zend_Service_Amazon

 * @subpackage Ec2

 * @copyright  Copyright (c) 2005-2010 Zend Technologies USA Inc. (http://www.zend.com)

 * @license    http://framework.zend.com/license/new-bsd     New BSD License

 * @version    $Id: Availabilityzones.php 20096 2010-01-06 02:05:09Z bkarwin $

 */

/**

 * @see Zend_Service_Amazon_Ec2_Abstract

 */

require_once 'Zend/Service/Amazon/Ec2/Abstract.php';

/**

 * An Amazon EC2 interface to query which Availibity Zones your account has access to.

 *

 * @category   Zend

 * @package    Zend_Service_Amazon

 * @subpackage Ec2

 * @copyright  Copyright (c) 2005-2010 Zend Technologies USA Inc. (http://www.zend.com)

 * @license    http://framework.zend.com/license/new-bsd     New BSD License

 */

class Zend_Service_Amazon_Ec2_Availabilityzones extends Zend_Service_Amazon_Ec2_Abstract

{

    /**

     * Describes availability zones that are currently available to the account

     * and their states.

     *

     * @param string|array $zoneName            Name of an availability zone.

     * @return array                            An array that contains all the return items.  Keys: zoneName and zoneState.

     */

    public function describe($zoneName = null)

    {

        $params = array();

        $params['Action'] = 'DescribeAvailabilityZones';

        if(is_array($zoneName) && !empty($zoneName)) {

            foreach($zoneName as $k=>$name) {

                $params['ZoneName.' . ($k+1)] = $name;

            }

        } elseif($zoneName) {

            $params['ZoneName.1'] = $zoneName;

        }

        $response = $this->sendRequest($params);

        $xpath  = $response->getXPath();

        $nodes  = $xpath->query('//ec2:item');

        $return = array();

        foreach ($nodes as $k => $node) {

            $item = array();

            $item['zoneName']   = $xpath->evaluate('string(ec2:zoneName/text())', $node);

            $item['zoneState']  = $xpath->evaluate('string(ec2:zoneState/text())', $node);

            $return[] = $item;

            unset($item);

        }

        return $return;

    }

}