/**
* Check that this cache instance is tracking the current user.
*/
protected function check_tracked_user()
{
if (isset($_SESSION['USER']->id) && $_SESSION['USER']->id !== null) {
// Get the id of the current user.
$new = $_SESSION['USER']->id;
} else {
// No user set up yet.
$new = 0;
}
if ($new !== self::$loadeduserid) {
// The current user doesn't match the tracked userid for this request.
if (!is_null(self::$loadeduserid)) {
// Purge the data we have for the old user.
// This way we don't bloat the session.
$this->purge();
// Update the session id just in case!
$this->set_session_id();
}
self::$loadeduserid = $new;
$this->currentuserid = $new;
} else {
if ($new !== $this->currentuserid) {
// The current user matches the loaded user but not the user last used by this cache.
$this->purge_current_user();
$this->currentuserid = $new;
// Update the session id just in case!
$this->set_session_id();
}
}
}
