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/**
* Akamai {OPEN} EdgeGrid Auth for PHP
*
* @author Davey Shafik <dshafik@akamai.com>
* @copyright Copyright 2016 Akamai Technologies, Inc. All rights reserved.
* @license Apache 2.0
* @link https://github.com/akamai-open/AkamaiOPEN-edgegrid-php
* @link https://developer.akamai.com
* @link https://developer.akamai.com/introduction/Client_Auth.html
*/
namespace Akamai\Open\EdgeGrid\Authentication;
/**
* Generates an Akamai formatted Date for each request
*
* @package Akamai\Open\EdgeGrid\Authentication
*/
class Timestamp
{
const FORMAT = 'Ymd\TH:i:sO';
/**
* @var \DateTime Signing Timestamp
*/
protected $timestamp;
/**
* @var string \DateInterval spec
*/
protected $validFor = 'PT10S';
/**
* Signing Timestamp
*/
public function __construct()
{
$this->timestamp = new \DateTime('now', new \DateTimeZone('UTC'));
}
/**
* Return true is timestamp is less than 10s old
*
* @return bool
*/
public function isValid()
{
$now = new \DateTime('now', new \DateTimeZone('UTC'));
$timestamp = clone $this->timestamp;
return $timestamp->add(new \DateInterval($this->validFor)) >= $now;
}
/**
* Set how long the current timestamp is considered valid
*
* @see \DateInterval
* @param string $interval A \DateInterval time spec
* @return $this
*/
public function setValidFor($interval)
{
$this->validFor = $interval;
return $this;
}
/**
* Return the timestamp when cast to string
*
* @return string Returns the date
*/
public function __toString()
{
return $this->timestamp->format(static::FORMAT);
}
}