[实战]MVC5+EF6+MySql企业网盘实战(14)——逻辑重构

                    [HttpPost]
        
            public
            void UploadFile(string filePath)
        {
            UserInfo userInfo = Session["user"] as UserInfo;
            //保证路径格式一直以/结束
            filePath = filePath.TrimEnd(‘/‘) + "/";
            if (userInfo == null)
            {
                RedirectToAction("Login", "UserInfo");
            }
            filePath = filePath == "/" ? "/NetDisk/" : filePath;
            var files = Request.Files;
            MyFile myFile = null;
            if (files.Count > 0)
            {
                var file = files[0];
                string fileName = file.FileName;
                Stream inputStream = file.InputStream;
                string fileSaveFolder = Server.MapPath("~/NetDisk");
                //如果目标不存在，则创建if (!Directory.Exists(fileSaveFolder))
                {
                    Directory.CreateDirectory(fileSaveFolder);
                }
                byte[] buffer = newbyte[inputStream.Length];
                //判断是否已经超出个人网盘大小var myFiles = _myFileServiceRepository.FindAll(x => x.User.Id == userInfo.Id && x.IsDelete == false);
                int myDiskSize = 0;
                if (myFiles.Count() > 0)
                {
                    myDiskSize = myFiles.Sum(x => x.FileSize);
                }
                //如果已经超出网盘大小，则给出提示if (myDiskSize + buffer.Length > userInfo.NetDiskSize)
                {
                    AlertMsg("对不起，您的网盘空间不足，请清理后再次上传，或联系管理员进行扩容。", "");
                    return;
                }
                inputStream.Read(buffer, 0, buffer.Length);
                string strFileMd5 = MD5Helper.GetMD5FromFile(buffer);
                string fileSavePath = Path.Combine(fileSaveFolder, filePath);
                //名称格式一律以md5命名。string strNewName = strFileMd5 + Path.GetExtension(file.FileName);
                fileSavePath = Path.Combine(fileSaveFolder, strNewName);
                //如果文件不存在，则保存物理文件。if (!System.IO.File.Exists(fileSavePath))
                {
                    file.SaveAs(fileSavePath);
                }
                //判断在数据库中同一路径下，md5相同，名称相同的文件是否存在，不存在则直接插入，否则对文件进行自动重命名保存。var fileIsExist = _myFileServiceRepository.Find(x => x.FileMd5 == strFileMd5 && x.User.Id == userInfo.Id && x.FileName == fileName);
                //如果找到的文件对象不为空，并且是删除状态，则修改删除状态，不再新增文件信息，否则添加。
                //查询导航属性var currentUser = _userInfoServiceRepository.Find(x => x.Id == userInfo.Id);
                if (fileIsExist != null)
                {
                    myFile = fileIsExist;
                    //文件被逻辑删除了，则更新状态，否则重命名后新增文件。if (fileIsExist.IsDelete)
                    {
                        fileIsExist.IsDelete = false;
                        _myFileServiceRepository.Update(fileIsExist);
                    }
                    else
                    {
                        //查找该用户下类似文件名的文件并且没有被逻辑删除的个数var count = _myFileServiceRepository.FindAll(x => x.User.Id == userInfo.Id && x.IsDelete == false && x.FileName.Contains(fileName)).Count();
                        fileName = count > 0 ? Path.GetFileNameWithoutExtension(fileName) + "(" + (count + 1).ToString() + ")" + Path.GetExtension(fileName) : fileName;
                        myFile = new MyFile()
                        {

                            FileMd5 = strFileMd5,
                            ModifyDt = DateTime.Now,
                            IsDelete = false,
                            FileSize = buffer.Length,
                            FolderPath = filePath,
                            FileExt = Path.GetExtension(fileSavePath),
                            CreateDt = DateTime.Now,
                            FileName = fileName,
                            FileIcon = GetFileIcon(Path.GetExtension(fileSavePath)),
                            User = currentUser,
                            IsFolder = 0
                        };
                        //保存数据库                        _myFileServiceRepository.Add(myFile);
                    }

                }
                else
                {

                    //新增文件信息
                    myFile = new MyFile()
                    {
                        FileMd5 = strFileMd5,
                        ModifyDt = DateTime.Now,
                        IsDelete = false,
                        FileSize = buffer.Length,
                        FolderPath = filePath,
                        FileExt = Path.GetExtension(fileSavePath),
                        CreateDt = DateTime.Now,
                        FileName = fileName,
                        FileIcon = GetFileIcon(Path.GetExtension(fileSavePath)),
                        User = currentUser,
                        IsFolder = 0
                    };
                    //保存数据库                    _myFileServiceRepository.Add(myFile);
                }
                _myFileServiceRepository.SaveChanges();
                string json = new JavaScriptSerializer().Serialize(myFile);
                AlertMsg("上传成功", json);
            }
        }