逻辑重构3

写在前面

本篇文章将新建文件夹的逻辑也进行一下修改。

新建文件夹

前面对网盘的逻辑进行了一下重构,发现越来越简单了。

public JsonResult CreateFolder()
      {
          UserInfo userInfo = Session["user"] as UserInfo;

          if (userInfo == null)
          {
              RedirectToAction("Login", "UserInfo");
          }
          string folderPath = Server.UrlDecode(Request.Params["folderPath"]);
          string folderName = Request.Params["folderName"];
          if (string.IsNullOrEmpty(folderName))
          {
              throw new ArgumentNullException("文件夹名称不能为空");
          }
          //检查文件夹是否已经存在
          Expression<Func<MyFile, bool>> where = null;
          if (string.IsNullOrEmpty(folderPath))
          {
              where = x => x.User.Id == userInfo.Id && x.IsFolder == 1 && x.IsDelete == false && x.FolderPath == "/NetDisk/";
          }
          else
          {
              where = x => x.User.Id == userInfo.Id && x.IsFolder == 1 && x.IsDelete == false && x.FolderPath == folderPath;
          }
          var count = _myFileServiceRepository.FindAll(where).Count();
          userInfo = _userInfoServiceRepository.Find(x => x.Id == userInfo.Id);
          if (count > 0)
          {
              //如果不存在,则新建,否则进行自动重命名
              folderName = folderName + "(" + (count + 1).ToString() + ")";
          }
          if (string.IsNullOrEmpty(folderPath))
          {
              folderPath = "/NetDisk/";
          }
          MyFile folder = new MyFile()
          {
              FolderPath = folderPath.TrimEnd('/') + "/",
              FileName = folderName,
              CreateDt = DateTime.Now,
              User = userInfo,
              FileExt = string.Empty,
              FileIcon = "/Content/Images/FolderType.png",
              FileMd5 = string.Empty,
              FileSize = 0,
              IsDelete = false,
              ModifyDt = DateTime.Now,
              IsFolder = 1
          };
          try
          {
              _myFileServiceRepository.Add(folder);
              _myFileServiceRepository.SaveChanges();
          }
          catch (Exception)
          {
              return new JsonResult() { Data = new JavaScriptSerializer().Serialize(new { code = 500, msg = "创建失败" }) };
          }
          return new JsonResult() { Data = new JavaScriptSerializer().Serialize(new { code = 200, folder = folder }) };
      }

上传文件的地方需要修改一下,对文件的路径中存在中文会出现乱码的情况,做一下修改。


        [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 = Server.UrlDecode(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 = new byte[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);
            }
        }

总结

今天练完车在路上好好想了一下,发现按照这个思路走下去,网盘功能实现起来更简单一些。