/**
* Sends an identity cookie.
* This method is used when [[enableAutoLogin]] is true.
* It saves [[id]], [[IdentityInterface::getAuthKey()|auth key]], and the duration of cookie-based login
* information in the cookie.
* @param IdentityInterface $identity
* @param integer $duration number of seconds that the user can remain in logged-in status.
* @see loginByCookie()
*/
protected function sendIdentityCookie($identity, $duration)
{
$cookie = new Cookie($this->identityCookie);
$cookie->value = json_encode([$identity->getId(), $identity->getAuthKey(), $this->getRole(), $duration], JSON_UNESCAPED_SLASHES | JSON_UNESCAPED_UNICODE);
$cookie->expire = time() + $duration;
Yii::$app->getResponse()->getCookies()->add($cookie);
}
