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 <?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) 2005-2015 Zend Technologies USA Inc. (http://www.zend.com)
  * @license    http://framework.zend.com/license/new-bsd     New BSD License
  * @version    $Id$
  */
 
 /**
  * @see Zend_Service_Amazon_Ec2_Abstract
  */
 // require_once 'Zend/Service/Amazon/Ec2/Abstract.php';
 
 /**
  * An Amazon EC2 interface to allocate, associate, describe and release Elastic IP address
  * from your account.
  *
  * @category   Zend
  * @package    Zend_Service_Amazon
  * @subpackage Ec2
  * @copyright  Copyright (c) 2005-2015 Zend Technologies USA Inc. (http://www.zend.com)
  * @license    http://framework.zend.com/license/new-bsd     New BSD License
  */
 class Zend_Service_Amazon_Ec2_Elasticip extends Zend_Service_Amazon_Ec2_Abstract
 {
     /**
      * Acquires an elastic IP address for use with your account
      *
      * @return string                           Returns the newly Allocated IP Address
      */
     public function allocate()
     {
         $params = array();
         $params['Action'] = 'AllocateAddress';
 
         $response = $this->sendRequest($params);
 
         $xpath = $response->getXPath();
         $ip = $xpath->evaluate('string(//ec2:publicIp/text())');
 
         return $ip;
     }
 
     /**
      * Lists elastic IP addresses assigned to your account.
      *
      * @param string|array $publicIp            Elastic IP or list of addresses to describe.
      * @return array
      */
     public function describe($publicIp = null)
     {
         $params = array();
         $params['Action'] = 'DescribeAddresses';
 
         if(is_array($publicIp) && !empty($publicIp)) {
             foreach($publicIp as $k=>$name) {
                 $params['PublicIp.' . ($k+1)] = $name;
             }
         } elseif($publicIp) {
             $params['PublicIp.1'] = $publicIp;
         }
 
         $response = $this->sendRequest($params);
 
         $xpath  = $response->getXPath();
         $nodes  = $xpath->query('//ec2:item');
 
         $return = array();
         foreach ($nodes as $k => $node) {
             $item = array();
             $item['publicIp']  = $xpath->evaluate('string(ec2:publicIp/text())', $node);
             $item['instanceId']   = $xpath->evaluate('string(ec2:instanceId/text())', $node);
 
             $return[] = $item;
             unset($item);
         }
 
         return $return;
     }
 
     /**
      * Releases an elastic IP address that is associated with your account
      *
      * @param string $publicIp                  IP address that you are releasing from your account.
      * @return boolean
      */
     public function release($publicIp)
     {
         $params = array();
         $params['Action'] = 'ReleaseAddress';
         $params['PublicIp'] = $publicIp;
 
         $response = $this->sendRequest($params);
         $xpath = $response->getXPath();
 
         $return = $xpath->evaluate('string(//ec2:return/text())');
 
         return ($return === "true");
     }
 
     /**
      * Associates an elastic IP address with an instance
      *
      * @param string $instanceId                The instance to which the IP address is assigned
      * @param string $publicIp                  IP address that you are assigning to the instance.
      * @return boolean
      */
     public function associate($instanceId, $publicIp)
     {
         $params = array();
         $params['Action'] = 'AssociateAddress';
         $params['PublicIp'] = $publicIp;
         $params['InstanceId'] = $instanceId;
 
         $response = $this->sendRequest($params);
         $xpath = $response->getXPath();
 
         $return = $xpath->evaluate('string(//ec2:return/text())');
 
         return ($return === "true");
     }
 
     /**
      * Disassociates the specified elastic IP address from the instance to which it is assigned.
      * This is an idempotent operation. If you enter it more than once, Amazon EC2 does not return an error.
      *
      * @param string $publicIp                  IP address that you are disassociating from the instance.
      * @return boolean
      */
     public function disassocate($publicIp)
     {
         $params = array();
         $params['Action'] = 'DisssociateAddress';
         $params['PublicIp'] = $publicIp;
 
         $response = $this->sendRequest($params);
         $xpath = $response->getXPath();
 
         $return = $xpath->evaluate('string(//ec2:return/text())');
 
         return ($return === "true");
     }
 
 }