public static bool IsUserAllowed(int userID, int contentID, PermissionTypes permissionType, ContentTypes contentType)
{
int permissionTypeID = permissionType.ToInt();
int contentTypeID = contentType.ToInt();
return(db.Permissions.Any(
p =>
p.PermissionTypeID >= permissionTypeID &&
p.ContentTypeID == contentTypeID &&
p.ContentID == contentID &&
p.GrantedUserID == userID
));
}