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<?php
/**
* Zend Framework (http://framework.zend.com/)
*
* @link http://github.com/zendframework/zf2 for the canonical source repository
* @copyright Copyright (c) 2005-2015 Zend Technologies USA Inc. (http://www.zend.com)
* @license http://framework.zend.com/license/new-bsd New BSD License
*/
namespace Zend\Http\Header;
/**
* Age HTTP Header
*
* @link http://www.w3.org/Protocols/rfc2616/rfc2616-sec14.html#sec14.6
*/
class Age implements HeaderInterface
{
/**
* Estimate of the amount of time in seconds since the response
*
* @var int
*/
protected $deltaSeconds;
/**
* Create Age header from string
*
* @param string $headerLine
* @return Age
* @throws Exception\InvalidArgumentException
*/
public static function fromString($headerLine)
{
list($name, $value) = GenericHeader::splitHeaderLine($headerLine);
// check to ensure proper header type for this factory
if (strtolower($name) !== 'age') {
throw new Exception\InvalidArgumentException('Invalid header line for Age string: "' . $name . '"');
}
$header = new static($value);
return $header;
}
public function __construct($deltaSeconds = null)
{
if ($deltaSeconds) {
$this->setDeltaSeconds($deltaSeconds);
}
}
/**
* Get header name
*
* @return string
*/
public function getFieldName()
{
return 'Age';
}
/**
* Get header value (number of seconds)
*
* @return int
*/
public function getFieldValue()
{
return $this->getDeltaSeconds();
}
/**
* Set number of seconds
*
* @param int $delta
* @return RetryAfter
*/
public function setDeltaSeconds($delta)
{
if (! is_int($delta) && ! is_numeric($delta)) {
throw new Exception\InvalidArgumentException('Invalid delta provided');
}
$this->deltaSeconds = (int) $delta;
return $this;
}
/**
* Get number of seconds
*
* @return int
*/
public function getDeltaSeconds()
{
return $this->deltaSeconds;
}
/**
* Return header line
* In case of overflow RFC states to set value of 2147483648 (2^31)
*
* @return string
*/
public function toString()
{
return 'Age: ' . (($this->deltaSeconds >= PHP_INT_MAX) ? '2147483648' : $this->deltaSeconds);
}
}