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.
/**
* Loads/stores oauth2 access tokens in DB for system accounts in order to use a single token across multiple sessions.
*
* @package core
* @copyright 2018 Jan Dageförde
* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
*/
namespace core\oauth2;
defined('MOODLE_INTERNAL') || die();
use core\persistent;
/**
* Loads/stores oauth2 access tokens in DB for system accounts in order to use a single token across multiple sessions.
*
* When a system user is authenticated via OAuth, we need to use a single access token across user sessions,
* because we want to avoid using multiple tokens at the same time for a single remote user. Reasons are that,
* first, redeeming the refresh token for an access token requires an additional request, and second, there is
* no guarantee that redeeming the refresh token doesn't invalidate *all* corresponding previous access tokes.
* As a result, we would need to either continuously request lots and lots of new access tokens, or persist the
* access token in the DB where it can be used from all sessions. Let's do the latter!
*
* @copyright 2018 Jan Dageförde
* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
*/
class access_token extends persistent {
/** The table name. */
const TABLE = 'oauth2_access_token';
/**
* Return the definition of the properties of this model.
*
* @return array
*/
protected static function define_properties() {
return array(
// Issuer id instead of the system account id because, at the time of storing/loading a token we may not
// know the system account id.
'issuerid' => array(
'type' => PARAM_INT
),
'token' => array(
'type' => PARAM_RAW,
),
'expires' => array(
'type' => PARAM_INT,
),
'scope' => array(
'type' => PARAM_RAW,
),
);
}
}