<?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: Reserved.php 20096 2010-01-06 02:05:09Z bkarwin $

 */

/**

 * @see Zend_Service_Amazon_Ec2_Abstract

 */

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

/**

 * Allows you to interface with the reserved instances on Amazon Ec2

 *

 * @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_Instance_Reserved extends Zend_Service_Amazon_Ec2_Abstract

{

    /**

     * Describes Reserved Instances that you purchased.

     *

     * @param string|array $instanceId        IDs of the Reserved Instance to describe.

     * @return array

     */

    public function describeInstances($instanceId)

    {

        $params = array();

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

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

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

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

            }

        } elseif($instanceId) {

            $params['ReservedInstancesId.1'] = $instanceId;

        }

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

        $xpath = $response->getXPath();

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

        $return = array();

        foreach($items as $item) {

            $i = array();

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

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

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

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

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

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

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

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

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

            $return[] = $i;

            unset($i);

        }

        return $return;

    }

    /**

     * Describes Reserved Instance offerings that are available for purchase.

     * With Amazon EC2 Reserved Instances, you purchase the right to launch Amazon

     * EC2 instances for a period of time (without getting insufficient capacity

     * errors) and pay a lower usage rate for the actual time used.

     *

     * @return array

     */

    public function describeOfferings()

    {

        $params = array();

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

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

        $xpath = $response->getXPath();

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

        $return = array();

        foreach($items as $item) {

            $i = array();

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

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

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

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

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

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

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

            $return[] = $i;

            unset($i);

        }

        return $return;

    }

    /**

     * Purchases a Reserved Instance for use with your account. With Amazon EC2

     * Reserved Instances, you purchase the right to launch Amazon EC2 instances

     * for a period of time (without getting insufficient capacity errors) and

     * pay a lower usage rate for the actual time used.

     *

     * @param string $offeringId            The offering ID of the Reserved Instance to purchase

     * @param integer $intanceCount         The number of Reserved Instances to purchase.

     * @return string                       The ID of the purchased Reserved Instances.

     */

    public function purchaseOffering($offeringId, $intanceCount = 1)

    {

        $params = array();

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

        $params['OfferingId.1'] = $offeringId;

        $params['instanceCount.1'] = intval($intanceCount);

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

        $xpath = $response->getXPath();

        $reservedInstancesId = $xpath->evaluate('string(//ec2:reservedInstancesId/text())');

        return $reservedInstancesId;

    }

}