feat: 完善用户界面，添加绑定与解除绑定的功能

server/src/Database.cs

@@ -46,6 +46,12 @@ public class User
     [Nullable]
     public Guid BoardID { get; set; }
 
+    /// <summary>
+    /// 用户绑定板子的过期时间
+    /// </summary>
+    [Nullable]
+    public DateTime? BoardExpireTime { get; set; }
+
     /// <summary>
     /// 用户权限枚举
     /// </summary>
@@ -98,6 +104,18 @@ public class Board
     [NotNull]
     public required BoardStatus Status { get; set; }
 
+    /// <summary>
+    /// 占用该板子的用户的唯一标识符
+    /// </summary>
+    [Nullable]
+    public Guid OccupiedUserID { get; set; }
+
+    /// <summary>
+    /// 占用该板子的用户的用户名
+    /// </summary>
+    [Nullable]
+    public string? OccupiedUserName { get; set; }
+
     /// <summary>
     /// FPGA 板子的固件版本号
     /// </summary>
@@ -210,7 +228,7 @@ public class AppDataConnection : DataConnection
     /// <returns>包含用户信息的结果，如果未找到或出错则返回相应状态</returns>
     public Result<Optional<User>> GetUserByName(string name)
     {
-        var user = this.User.Where((user) => user.Name == name).ToArray();
+        var user = this.UserTable.Where((user) => user.Name == name).ToArray();
 
         if (user.Length > 1)
         {
@@ -235,7 +253,7 @@ public class AppDataConnection : DataConnection
     /// <returns>包含用户信息的结果，如果未找到或出错则返回相应状态</returns>
     public Result<Optional<User>> GetUserByEMail(string email)
     {
-        var user = this.User.Where((user) => user.EMail == email).ToArray();
+        var user = this.UserTable.Where((user) => user.EMail == email).ToArray();
 
         if (user.Length > 1)
         {
@@ -270,12 +288,12 @@ public class AppDataConnection : DataConnection
 
         var user = ret.Value.Value;
 
-        if (user.Password == password) 
+        if (user.Password == password)
         {
             logger.Info($"用户 {name} 密码验证成功");
             return new(user);
         }
-        else 
+        else
         {
             logger.Warn($"用户 {name} 密码验证失败");
             return new(Optional<User>.None);
@@ -287,15 +305,70 @@ public class AppDataConnection : DataConnection
     /// </summary>
     /// <param name="userId">用户的唯一标识符</param>
     /// <param name="boardId">实验板的唯一标识符</param>
+    /// <param name="expireTime">绑定过期时间</param>
     /// <returns>更新的记录数</returns>
-    public int BindUserToBoard(Guid userId, Guid boardId)
+    public int BindUserToBoard(Guid userId, Guid boardId, DateTime expireTime)
     {
-        var result = this.User
+        // 获取用户信息
+        var user = this.UserTable.Where(u => u.ID == userId).FirstOrDefault();
+        if (user == null)
+        {
+            logger.Error($"未找到用户: {userId}");
+            return 0;
+        }
+
+        // 更新用户的板子绑定信息
+        var userResult = this.UserTable
             .Where(u => u.ID == userId)
             .Set(u => u.BoardID, boardId)
+            .Set(u => u.BoardExpireTime, expireTime)
             .Update();
-        logger.Info($"用户 {userId} 已绑定到实验板 {boardId}");
-        return result;
+
+        // 更新板子的用户绑定信息
+        var boardResult = this.BoardTable
+            .Where(b => b.ID == boardId)
+            .Set(b => b.Status, Board.BoardStatus.Busy)
+            .Set(b => b.OccupiedUserID, userId)
+            .Set(b => b.OccupiedUserName, user.Name)
+            .Update();
+
+        logger.Info($"用户 {userId} ({user.Name}) 已绑定到实验板 {boardId}，过期时间: {expireTime}");
+        return userResult + boardResult;
+    }
+
+    /// <summary>
+    /// 解除用户与实验板的绑定
+    /// </summary>
+    /// <param name="userId">用户的唯一标识符</param>
+    /// <returns>更新的记录数</returns>
+    public int UnbindUserFromBoard(Guid userId)
+    {
+        // 获取用户当前绑定的板子ID
+        var user = this.UserTable.Where(u => u.ID == userId).FirstOrDefault();
+        Guid boardId = user?.BoardID ?? Guid.Empty;
+
+        // 清空用户的板子绑定信息
+        var userResult = this.UserTable
+            .Where(u => u.ID == userId)
+            .Set(u => u.BoardID, Guid.Empty)
+            .Set(u => u.BoardExpireTime, (DateTime?)null)
+            .Update();
+
+        // 如果用户原本绑定了板子，则清空板子的用户绑定信息
+        int boardResult = 0;
+        if (boardId != Guid.Empty)
+        {
+            boardResult = this.BoardTable
+                .Where(b => b.ID == boardId)
+                .Set(b => b.Status, Board.BoardStatus.Available)
+                .Set(b => b.OccupiedUserID, Guid.Empty)
+                .Set(b => b.OccupiedUserName, (string?)null)
+                .Update();
+            logger.Info($"实验板 {boardId} 状态已设置为空闲，用户绑定信息已清空");
+        }
+
+        logger.Info($"用户 {userId} 已解除实验板绑定");
+        return userResult + boardResult;
     }
 
     /// <summary>
@@ -326,7 +399,26 @@ public class AppDataConnection : DataConnection
     /// <returns>删除的记录数</returns>
     public int DeleteBoardByName(string name)
     {
-        var result = this.Board.Where(board => board.BoardName == name).Delete();
+        // 先获取要删除的板子信息
+        var board = this.BoardTable.Where(b => b.BoardName == name).FirstOrDefault();
+        if (board == null)
+        {
+            logger.Warn($"未找到名称为 {name} 的实验板");
+            return 0;
+        }
+
+        // 如果板子被占用，先解除绑定
+        if (board.OccupiedUserID != Guid.Empty)
+        {
+            this.UserTable
+                .Where(u => u.ID == board.OccupiedUserID)
+                .Set(u => u.BoardID, Guid.Empty)
+                .Set(u => u.BoardExpireTime, (DateTime?)null)
+                .Update();
+            logger.Info($"已解除用户 {board.OccupiedUserID} 与实验板 {name} 的绑定");
+        }
+
+        var result = this.BoardTable.Where(b => b.BoardName == name).Delete();
         logger.Info($"实验板已删除: {name}，删除记录数: {result}");
         return result;
     }
@@ -338,18 +430,62 @@ public class AppDataConnection : DataConnection
     /// <returns>删除的记录数</returns>
     public int DeleteBoardByID(Guid id)
     {
-        var result = this.Board.Where(board => board.ID == id).Delete();
+        // 先获取要删除的板子信息
+        var board = this.BoardTable.Where(b => b.ID == id).FirstOrDefault();
+        if (board == null)
+        {
+            logger.Warn($"未找到ID为 {id} 的实验板");
+            return 0;
+        }
+
+        // 如果板子被占用，先解除绑定
+        if (board.OccupiedUserID != Guid.Empty)
+        {
+            this.UserTable
+                .Where(u => u.ID == board.OccupiedUserID)
+                .Set(u => u.BoardID, Guid.Empty)
+                .Set(u => u.BoardExpireTime, (DateTime?)null)
+                .Update();
+            logger.Info($"已解除用户 {board.OccupiedUserID} 与实验板 {id} 的绑定");
+        }
+
+        var result = this.BoardTable.Where(b => b.ID == id).Delete();
         logger.Info($"实验板已删除: {id}，删除记录数: {result}");
         return result;
     }
 
+    /// <summary>
+    /// 根据实验板ID获取实验板信息
+    /// </summary>
+    /// <param name="id">实验板的唯一标识符</param>
+    /// <returns>包含实验板信息的结果，如果未找到则返回空</returns>
+    public Result<Optional<Board>> GetBoardByID(Guid id)
+    {
+        var boards = this.BoardTable.Where(board => board.ID == id).ToArray();
+
+        if (boards.Length > 1)
+        {
+            logger.Error($"数据库中存在多个相同ID的实验板: {id}");
+            return new(new Exception($"数据库中存在多个相同ID的实验板: {id}"));
+        }
+
+        if (boards.Length == 0)
+        {
+            logger.Info($"未找到ID对应的实验板: {id}");
+            return new(Optional<Board>.None);
+        }
+
+        logger.Debug($"成功获取实验板信息: {id}");
+        return new(boards[0]);
+    }
+
     /// <summary>
     /// 获取所有实验板信息
     /// </summary>
     /// <returns>所有实验板的数组</returns>
     public Board[] GetAllBoard()
     {
-        var boards = this.Board.ToArray();
+        var boards = this.BoardTable.ToArray();
         logger.Debug($"获取所有实验板，共 {boards.Length} 块");
         return boards;
     }
@@ -357,10 +493,12 @@ public class AppDataConnection : DataConnection
     /// <summary>
     /// 获取一块可用的实验板并将其状态设置为繁忙
     /// </summary>
+    /// <param name="userId">要分配板子的用户ID</param>
+    /// <param name="expireTime">绑定过期时间</param>
     /// <returns>可用的实验板，如果没有可用的板子则返回空</returns>
-    public Optional<Board> GetAvailableBoard()
+    public Optional<Board> GetAvailableBoard(Guid userId, DateTime expireTime)
     {
-        var boards = this.Board.Where(
+        var boards = this.BoardTable.Where(
                 (board) => board.Status == Database.Board.BoardStatus.Available
             ).ToArray();
 
@@ -372,12 +510,34 @@ public class AppDataConnection : DataConnection
         else
         {
             var board = boards[0];
-            board.Status = Database.Board.BoardStatus.Busy;
-            this.Board
+            var user = this.UserTable.Where(u => u.ID == userId).FirstOrDefault();
+            
+            if (user == null)
+            {
+                logger.Error($"未找到用户: {userId}");
+                return new(null);
+            }
+
+            // 更新板子状态和用户绑定信息
+            this.BoardTable
                 .Where(target => target.ID == board.ID)
-                .Set(target => target.Status, board.Status)
+                .Set(target => target.Status, Board.BoardStatus.Busy)
+                .Set(target => target.OccupiedUserID, userId)
+                .Set(target => target.OccupiedUserName, user.Name)
                 .Update();
-            logger.Info($"实验板 {board.BoardName} ({board.ID}) 已分配，状态更新为繁忙");
+
+            // 更新用户的板子绑定信息
+            this.UserTable
+                .Where(u => u.ID == userId)
+                .Set(u => u.BoardID, board.ID)
+                .Set(u => u.BoardExpireTime, expireTime)
+                .Update();
+
+            board.Status = Database.Board.BoardStatus.Busy;
+            board.OccupiedUserID = userId;
+            board.OccupiedUserName = user.Name;
+
+            logger.Info($"实验板 {board.BoardName} ({board.ID}) 已分配给用户 {user.Name} ({userId})，过期时间: {expireTime}");
             return new(board);
         }
     }
@@ -385,10 +545,10 @@ public class AppDataConnection : DataConnection
     /// <summary>
     /// 用户表
     /// </summary>
-    public ITable<User> User => this.GetTable<User>();
+    public ITable<User> UserTable => this.GetTable<User>();
 
     /// <summary>
     /// FPGA 板子表
     /// </summary>
-    public ITable<Board> Board => this.GetTable<Board>();
+    public ITable<Board> BoardTable => this.GetTable<Board>();
 }