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<?php
/**
* Copyright 2014 Facebook, Inc.
*
* You are hereby granted a non-exclusive, worldwide, royalty-free license to
* use, copy, modify, and distribute this software in source code or binary
* form for use in connection with the web services and APIs provided by
* Facebook.
*
* As with any software that integrates with the Facebook platform, your use
* of this software is subject to the Facebook Developer Principles and
* Policies [http://developers.facebook.com/policy/]. This copyright notice
* shall be included in all copies or substantial portions of the software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
* DEALINGS IN THE SOFTWARE.
*
*/
namespace Facebook\Authentication;
/**
* Class AccessToken
*
* @package Facebook
*/
class AccessToken
{
/**
* The access token value.
*
* @var string
*/
protected $value = '';
/**
* Date when token expires.
*
* @var \DateTime|null
*/
protected $expiresAt;
/**
* Create a new access token entity.
*
* @param string $accessToken
* @param int $expiresAt
*/
public function __construct($accessToken, $expiresAt = 0)
{
$this->value = $accessToken;
if ($expiresAt) {
$this->setExpiresAtFromTimeStamp($expiresAt);
}
}
/**
* Generate an app secret proof to sign a request to Graph.
*
* @param string $appSecret The app secret.
*
* @return string
*/
public function getAppSecretProof($appSecret)
{
return hash_hmac('sha256', $this->value, $appSecret);
}
/**
* Getter for expiresAt.
*
* @return \DateTime|null
*/
public function getExpiresAt()
{
return $this->expiresAt;
}
/**
* Determines whether or not this is an app access token.
*
* @return bool
*/
public function isAppAccessToken()
{
return strpos($this->value, '|') !== false;
}
/**
* Determines whether or not this is a long-lived token.
*
* @return bool
*/
public function isLongLived()
{
if ($this->expiresAt) {
return $this->expiresAt->getTimestamp() > time() + (60 * 60 * 2);
}
if ($this->isAppAccessToken()) {
return true;
}
return false;
}
/**
* Checks the expiration of the access token.
*
* @return boolean|null
*/
public function isExpired()
{
if ($this->getExpiresAt() instanceof \DateTime) {
return $this->getExpiresAt()->getTimestamp() < time();
}
if ($this->isAppAccessToken()) {
return false;
}
return null;
}
/**
* Returns the access token as a string.
*
* @return string
*/
public function getValue()
{
return $this->value;
}
/**
* Returns the access token as a string.
*
* @return string
*/
public function __toString()
{
return $this->getValue();
}
/**
* Setter for expires_at.
*
* @param int $timeStamp
*/
protected function setExpiresAtFromTimeStamp($timeStamp)
{
$dt = new \DateTime();
$dt->setTimestamp($timeStamp);
$this->expiresAt = $dt;
}
}
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