private function buildPermissionsJson()
 {
     $permissions = [];
     $this->checkPermission(PermissionNames::CreateConference(), $permissions);
     $this->checkPermission(PermissionNames::ManageGlobalPermissions(), $permissions);
     $this->checkPermission(PermissionNames::ApproveUserRegistration(), $permissions);
     $this->checkPermission(PermissionNames::ViewSiteStatistics(), $permissions);
     if (!is_null(Auth::user())) {
         $pnames = Permission::whereHas("roles", function ($query) {
             $query->whereHas("users", function ($query) {
                 $query->where("id", Auth::user()->id);
             });
         })->select("name")->get()->toArray();
         $pnames = array_map(function ($p) {
             return $p['name'];
         }, $pnames);
         $lookFor = PermissionNames::permissionManagementPermissionBases();
         foreach ($pnames as $permName) {
             $normal = PermissionNames::normalizePermissionName($permName);
             if (in_array($normal, $lookFor)) {
                 $permissions[] = "manage-some-permissions";
                 break;
             }
         }
     }
     return $permissions;
 }