public IActionResult FilePage(long fileId)
        {
            HostingFile file = _hostingCore.GetFileById(fileId);

            if (file == null)
            {
                return(NotFound());
            }

            var userFileInfo = new UserFileModel
            {
                File = file,
                User = _hostingCore.GetUserById(file.AuthorId)
            };

            return(View(userFileInfo));
        }
        public IActionResult Download(long fileId)
        {
            HostingFile file = _hostingCore.GetFileById(fileId);

            if (file == null)
            {
                return(NotFound());
            }

            return(File(Path.Combine("~", file.Link), "application/octet-stream", file.Name));
        }