public JsonResult Children(
FileNode target,
[FromQuery]int index = 0,
[FromQuery]int length = 10,
[FromQuery]OrderTypes order = OrderTypes.DirFirst) {
if (!target.HasReadAuthority(User, Database)) {
throw new AuthorizeException("無權限存取該目標");
}
if (target.IsFile) throw new ApiInvalidOperationException("檔案無子系");
var data = target.GetChildren(Database);
if (order == OrderTypes.DirFirst) {
data = from t in data
orderby t.IsFile, t.Ext, t.Name
select t;
} else if (order == OrderTypes.FileFirst) {
data = from t in data
orderby t.IsFile, t.Ext descending, t.Name
select t;
}
var result = new ApiResult() {
Result = data.Skip(index).Take(length)
};
result.Type.Index = index;
result.Type.Length = length;
result.Type.Count = data.Count();
return result;
}
public JsonResult Info(FileNode target) {
if (!target.HasReadAuthority(User, Database)) {
throw new AuthorizeException("無權限存取該目標");
}
return new ApiResult() {
Result = target
};
}
public JsonResult Clear(
FileNode target,
[FromForm]List<FileNodeNullableProperties> properties) {
if (!target.HasWriteAuthority(User, Database)) {
throw new AuthorizeException("無權限進行變更");
}
foreach (var property in properties) {
if (property == FileNodeNullableProperties.Description) {
target.Description = null;
} else if (property == FileNodeNullableProperties.DirMaxSize) {
if (target.IsFile) continue;
} else if (property == FileNodeNullableProperties.Group) {
if (target.OwnerId == User.Id) target.GroupId = null;
}
}
Database.SaveChanges();
return new ApiResult() {
Result = target
};
}
public JsonResult Delete(FileNode target) {
if (target == null) throw new ApiArgumentException($"{nameof(target)}不應該為null");
if (!target.HasWriteAuthority(User, Database)) {
throw new AuthorizeException("無權限存取該目錄");
}
if (target.ParentId == null) throw new ApiInvalidOperationException("使用者根目錄不得刪除");
target.Delete(Database);
return new ApiResult();
}
/// <summary>
/// 新增子目錄節點
/// </summary>
/// <param name="parent">父節點</param>
/// <param name="dirName"></param>
/// <returns></returns>
protected async Task<JsonResult> CreateDir(
FileNode parent,
[FromForm]string dirName) {
FileNode child = await parent.CreateChildrenAsync(dirName, Database);
var parentList = child.GetParentChain(Database);
foreach (var p in parentList) p.Datetime = child.Datetime;
await Database.SaveChangesAsync();
return new ApiResult() {
Result = child
};
}
public JsonResult Put(
FileNode target,
FileNode parent,
[FromForm]string name = null,
[FromForm]string description = null,
[FromForm]long? dirMaxSize = null,
[FromForm]Group group = null,
[FromForm]FileNodeAuthority? groupAuthority = null,
[FromForm]FileNodeAuthority? otherAuthority = null
) {
if (!target.HasWriteAuthority(User, Database)) {
throw new AuthorizeException("無權限進行變更");
}
//是目錄，且非擁有者禁止調整
if (!target.IsFile && target.Owner != User) {
throw new AuthorizeException("僅目錄所有者可進行變更");
}
#region 非擁有者僅可變更檔案的名稱與敘述
if (name != null) target.Name = name;
if (description != null) target.Description = description;
if (!target.IsFile && dirMaxSize.HasValue) target.DirMaxSize = dirMaxSize;
#endregion
if (target.Owner == User) {//以下屬性僅擁有者
if (parent != null && target.ParentId != null) {
target.ParentId = parent.Id;//僅非根目錄可移動
}
if (group != null) target.Group = group;
if (groupAuthority.HasValue) target.GroupAuthority = groupAuthority.Value;
if (otherAuthority.HasValue) target.OtherAuthority = otherAuthority.Value;
}
Database.SaveChanges();
return new ApiResult() {
Result = target
};
}
public async Task<JsonResult> Post(
FileNode target = null,
[FromForm]IFormFile[] files = null,
[FromForm]string dirName = "未命名資料夾") {
if (!IsLogin && target == null) throw new ApiInvalidOperationException("未登入狀態必須要指定目錄");
if (target == null) {//預設上傳到目前使用者根目錄
target = User.GetRootFileNode(Database);
}
if (target.IsFile) throw new ApiInvalidOperationException($"目標節點不應該為檔案");
if (!target.HasWriteAuthority(User, Database)) {
throw new AuthorizeException("無權限存取該目錄");
}
if (files != null && files.Count() > 0) {//上傳檔案至指定目錄
return await UploadFile(target, files);
} else if (target.Owner == User) {
return await CreateDir(target, dirName);
}
throw new AuthorizeException("僅目錄擁有者可以建立子系目錄目錄");
}
/// <summary>
/// 上傳檔案至指定檔案節點
/// </summary>
/// <param name="parent">父目錄</param>
/// <param name="files">檔案集合</param>
/// <returns></returns>
protected async Task<JsonResult> UploadFile(
FileNode parent,
IFormFile[] files) {
List<FileNode> result = new List<FileNode>();
foreach (var file in files) {
result.Add(await parent.CreateChildrenAsync(file, Database));
}
return new ApiResult() {
Result = result.ToArray()
};
}
public JsonResult GeneratePreviewKey(FileNode target) {
if (!target.HasReadAuthority(User, Database)) {
throw new AuthorizeException("無權限存取該目標");
}
if (!target.IsFile) throw new ApiInvalidOperationException($"目標節點不應該為目錄");
var ExpireTime = DateTime.Now.AddMinutes(10);
Guid Key = PreviewKeyCheck.Create(target.Id, ExpireTime);
var result = new ApiResult() {
Result = new {
TargetId = target.Id,
Key = Key,
ExpireTime = ExpireTime
}
};
result.Type.Name = "PreviewKey";
return result;
}
public FileStreamResult Preview(
FileNode target,
Guid key) {
if (!PreviewKeyCheck.Check(target.Id, key)) {
throw new AuthorizeException("錯誤的Key，請確認該Key未過期且尚未使用過");
}
return File(target.GetFileStream(), target.ContentType, $"{target.Name}.{target.Ext}");
}
public FileStreamResult Download(FileNode target) {
if (!target.HasReadAuthority(User, Database)) {
throw new AuthorizeException("無權限存取該目標");
}
target.Download++;
Database.SaveChanges();
if (target.IsFile) {
return File(target.GetFileStream(), target.ContentType, target.FullName);
} else {
var FilePath = target.GetAndCreateDirZipFileRealPath(User, Database);
Response.OnCompleted(async (filePath) => {
System.IO.File.Delete((string)filePath);
},FilePath);
return File(
new FileStream(FilePath, FileMode.Open),
"application/zip",
$"{target.Name}.zip");
}
}
public JsonResult Search(
FileNode target = null,
[FromQuery]string keyword = "",
[FromQuery]int index = 0,
[FromQuery]int length = 10,
[FromQuery]OrderTypes order = OrderTypes.DirFirst) {
if (target == null && !IsLogin) throw new AuthorizeException();
if (target == null) {
target = User.GetRootFileNode(Database);
}
if (target.IsFile) throw new ApiInvalidOperationException("檔案無子系");
if (!target.HasReadAuthority(User, Database)) {
throw new AuthorizeException("無權限存取該目標");
}
IQueryable<FileNode> data = Database.FileNode.Where(x => x.OwnerId == User.Id).Where(x => x.Name.Contains(keyword));
if (target != null) {
data = from t in Database.FileNode
where t.ParentId == target.Id && t.Name.Contains(keyword)
select t;
}
if (order == OrderTypes.DirFirst) {
data = from t in data
orderby t.IsFile, t.Ext, t.Name
select t;
} else if (order == OrderTypes.FileFirst) {
data = from t in data
orderby t.IsFile, t.Ext descending, t.Name
select t;
}
var result = new ApiResult() {
Result = data.Skip(index).Take(length)
};
result.Type.Index = index;
result.Type.Length = length;
result.Type.Count = data.Count();
return result;
}
[Authorize("AdminOnly")]//僅管理員擁有權限
public JsonResult AddUser(
[FromForm]string id,
[FromForm]string password = "******",
[FromForm]UserAuthority authority = UserAuthority.User,
[FromForm]long spaceSize = 0) {
if (string.IsNullOrWhiteSpace(id)) {
throw new ApiArgumentException($"參數{nameof(id)}不該為空字串或null");
}
User newUser = new User() {
Id = id,
Authority = UserAuthority.User,
Name = id,
SpaceSize = spaceSize == -1 ? null : (long?)spaceSize
};
if (newUser.Authority == UserAuthority.Admin) newUser.SpaceSize = null;
newUser.SetPassword(password);
Database.User.Add(newUser);
var rootNode = new FileNode() { Owner = newUser, Name = id };
Database.FileNode.Add(rootNode);
Database.SaveChanges();
return new ApiResult() {
Result = newUser
};
}
/// <summary>
/// 建立目錄節點
/// </summary>
/// <param name="Name">目錄名稱</param>
/// <param name="Database">資料庫</param>
/// <returns></returns>
public async Task<FileNode> CreateChildrenAsync(string Name, SharpDiskDbContext Database) {
FileNode child = new FileNode() {
Name = Name,
Datetime = DateTime.Now,
Parent = this,
Owner = this.Owner,
IsFile = false,
GroupId = this.GroupId,
GroupAuthority = this.GroupAuthority,
OtherAuthority = this.OtherAuthority
};
Database.FileNode.Add(child);
await Database.SaveChangesAsync();
return child;
}
/// <summary>
/// 建立檔案節點
/// </summary>
/// <param name="File">檔案</param>
/// <param name="Database">資料庫</param>
/// <returns></returns>
public async Task<FileNode> CreateChildrenAsync(IFormFile File, SharpDiskDbContext Database) {
FileNode newFile = new FileNode();
#region 空間檢查
if (//使用者空間不足
Owner.SpaceSize.HasValue &&//有空間限制
Owner.GetTotalUsedSpace(Database) + File.Length > Owner.SpaceSize) {
throw new LackOfSpaceException($"目前使用者空間不足");
}
//檢查目錄鍊容量是否足夠
var ParentChain = this.GetParentChain(Database);
ParentChain.Insert(0, this);
var TooSmail = ParentChain.Where(x =>
x.DirMaxSize.HasValue && x.Size + File.Length > x.DirMaxSize
);
if (TooSmail.Count() > 0) {
throw new LackOfSpaceException($"達到父系目錄限制大小:{string.Join(",", TooSmail.Select(x => x.Name))}");
}
DateTime now = DateTime.Now;
foreach (var node in ParentChain) {
node.Size += File.Length;
node.Datetime = now;
}
#endregion
#region 儲存檔案
try {
using (FileStream fileStream = System.IO.File.Create(Startup.FilesDirPath + newFile.Id)) {
await File.OpenReadStream().CopyToAsync(fileStream);
await fileStream.FlushAsync();
}
} catch (Exception e) {
throw new UnknowException(e.Message);
}
#endregion
#region FileNode建構
newFile.IsFile = true;
newFile.Owner = Owner;
newFile.GroupId = this.GroupId;//上傳後的檔案權限繼承
newFile.GroupAuthority = this.GroupAuthority;
newFile.OtherAuthority = this.OtherAuthority;
newFile.Parent = this;
newFile.Size = File.Length;
newFile.ContentType = File.ContentType;
newFile.Ext = File.FileName.Split('.').LastOrDefault();
newFile.Datetime = DateTime.Now;
newFile.Name = File.FileName.Substring(0, File.FileName.LastIndexOf("."));
#endregion
Database.FileNode.Add(newFile);
Database.SaveChanges();
return newFile;
}