BookStack\Services\PermissionService::getRoles PHP Method

    protected function getRoles()
    {
        if ($this->userRoles !== false) {
            return $this->userRoles;
        }
        $roles = [];
        if (auth()->guest()) {
            $roles[] = $this->role->getSystemRole('public')->id;
            return $roles;
        }
        foreach ($this->currentUser()->roles as $role) {
            $roles[] = $role->id;
        }
        return $roles;
    }