finish basic database

server/src/Database.cs

@@ -0,0 +1,113 @@
+using LinqToDB;
+using LinqToDB.Data;
+using LinqToDB.Mapping;
+
+namespace Database;
+
+/// <summary>
+/// 用户类，表示用户信息
+/// </summary>
+public class User
+{
+    /// <summary>
+    /// 用户的唯一标识符
+    /// </summary>
+    [PrimaryKey]
+    public Guid ID { get; set; } = Guid.NewGuid();
+
+    /// <summary>
+    /// 用户的名称
+    /// </summary>
+    [NotNull]
+    public required string Name { get; set; }
+}
+
+/// <summary>
+/// FPGA 板子类，表示板子信息
+/// </summary>
+public class Board
+{
+    /// <summary>
+    /// FPGA 板子的唯一标识符
+    /// </summary>
+    [PrimaryKey]
+    public Guid Id { get; set; } = Guid.NewGuid();
+
+    /// <summary>
+    /// FPGA 板子的名称
+    /// </summary>
+    [NotNull]
+    public required string BoardName { get; set; }
+}
+
+/// <summary>
+/// 应用程序数据连接类，用于与数据库交互
+/// </summary>
+public class AppDataConnection : DataConnection
+{
+    static readonly LinqToDB.DataOptions options =
+        new LinqToDB.DataOptions()
+            .UseSQLite($"Data Source={Environment.CurrentDirectory}/Database.sqlite");
+
+    /// <summary>
+    /// 初始化应用程序数据连接
+    /// </summary>
+    public AppDataConnection() : base(options) { }
+
+
+    /// <summary>
+    /// 创建所有数据库表
+    /// </summary>
+    public void CreateAllTables()
+    {
+        this.CreateTable<User>();
+        this.CreateTable<Board>();
+    }
+
+    /// <summary>
+    /// 删除所有数据库表
+    /// </summary>
+    public void DropAllTables()
+    {
+        this.DropTable<User>();
+        this.DropTable<Board>();
+    }
+
+    /// <summary>
+    /// 添加一个新的用户到数据库
+    /// </summary>
+    /// <param name="name">用户的名称</param>
+    /// <returns>插入的记录数</returns>
+    public int AddUser(string name)
+    {
+        var user = new User()
+        {
+            Name = name
+        };
+        return this.Insert(user);
+    }
+
+    /// <summary>
+    /// 添加一块新的 FPGA 板子到数据库
+    /// </summary>
+    /// <param name="name">FPGA 板子的名称</param>
+    /// <returns>插入的记录数</returns>
+    public int AddBoard(string name)
+    {
+        var board = new Board()
+        {
+            BoardName = name
+        };
+        return this.Insert(board);
+    }
+
+    /// <summary>
+    /// 用户表
+    /// </summary>
+    public ITable<User> User => this.GetTable<User>();
+
+    /// <summary>
+    /// FPGA 板子表
+    /// </summary>
+    public ITable<Board> Board => this.GetTable<Board>();
+}