public Task <bool> CheckPermission(string functionId, string action, string[] roles)
{
var functions = _functionRepository.FindAllAsNoTracking();
var permissions = _permissionRepository.FindAllAsNoTracking();
var query = from f in functions
join p in permissions on f.Id equals p.FunctionId
join r in _roleManager.Roles on p.RoleId equals r.Id
where roles.Contains(r.Name) && f.Id == functionId &&
((p.CanCreate && action == "Create") ||
(p.CanUpdate && action == "Update") ||
(p.CanDelete && action == "Delete") ||
(p.CanRead && action == "Read"))
select p;
return(query.AnyAsync());
}