/// <summary>
/// 新增群組成員
/// </summary>
/// <param name="User">使用者</param>
/// <param name="Database">資料庫</param>
public void AddMember(User User,SharpDiskDbContext Database)
{
if (IsMember(User, Database)) {
throw new ApiInvalidOperationException("重複成員");
}
UserGroup newdata = new Models.UserGroup() {
User = User,
Group = this
};
Database.UserGroup.Add(newdata);
Database.SaveChanges();
}
/// <summary>
/// 移除群組成員
/// </summary>
/// <param name="User"></param>
/// <param name="Database"></param>
public void RemoveMember(User User,SharpDiskDbContext Database)
{
if (OwnerId == User.Id) throw new ApiInvalidOperationException("目標不可為擁有者");
if (!IsMember(User, Database)) throw new ApiInvalidOperationException("目標必須為成員");
UserGroup data = new UserGroup() {
User = User,
Group = this
};
Database.UserGroup.Add(data);
Database.SaveChanges();
}
/// <summary>
/// 在指定的<see cref="SharpDiskDbContext"/>中移除此群組
/// </summary>
/// <param name="Database">指定資料庫</param>
public void Delete(SharpDiskDbContext Database)
{
//將本群組所有成員退出
Database.UserGroup.RemoveRange(from t in Database.UserGroup
where t.GroupId == this.Id
select t);
//清除所有檔案節點有授權本節點存取之權利
var fileNodes = from t in Database.FileNode
where t.GroupId == this.Id
select t;
foreach(var fileNode in fileNodes) {
fileNode.Group = null;//清除群組
fileNode.GroupAuthority = FileNodeAuthority.Null;//清除群組權限
}
Database.Group.Remove(this);
Database.SaveChanges();
}
/// <summary>
/// 在指定的<see cref="SharpDiskDbContext"/>中移除此使用者
/// </summary>
/// <param name="Database">指定資料庫</param>
public void Delete(SharpDiskDbContext Database)
{
#region DeleteGroup
//退出所有加入的群組
Database.UserGroup.RemoveRange(from t in Database.UserGroup
where t.UserId == this.Id
select t);
Database.SaveChanges();
//刪除所有擁有的群組
var ownGroup = from t in Database.Group
where t.OwnerId == this.Id
select t;
foreach (var group in ownGroup) {
group.Delete(Database);
}
#endregion
#region 刪除擁有的檔案節點
GetRootFileNode(Database).Delete(Database);
#endregion
Database.User.Remove(this);
Database.SaveChanges();
}
/// <summary>
/// 在指定的<see cref="SharpDiskDbContext"/>中移除此檔案節點
/// </summary>
/// <param name="Database">指定資料庫</param>
public void Delete(SharpDiskDbContext Database) {
if (this.ParentId == null) {//Root Node
throw new ApiInvalidOperationException("使用者根節點不可刪除");
}
if (IsFile) {
//檔案節點為終點，直接刪除與檔案實體
File.Delete(Startup.FilesDirPath + this.Id);
} else {
//目錄節點必須要刪除子節點才可自我清除
var child = from t in Database.FileNode
where t.ParentId == this.Id
select t;
foreach (var node in child) node.Delete(Database);
}
Database.FileNode.Remove(this);
Database.SaveChanges();
}
/// <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;
}