Shogi/Shogi.Api/Repositories/UserRepository.cs

using Dapper;
using Shogi.Api.Models;
using System.Data;
using System.Data.SqlClient;

namespace Shogi.Api.Repositories;

public class UserRepository : IUserRepository
{
    private readonly string connectionString;

    public UserRepository(IConfiguration configuration)
    {
        var connectionString = configuration.GetConnectionString("ShogiDatabase");
        if (string.IsNullOrEmpty(connectionString))
        {
            throw new InvalidOperationException("Connection string for database is empty.");
        }
        this.connectionString = connectionString;
    }

    public async Task CreateUser(User user)
    {
        using var connection = new SqlConnection(connectionString);
        await connection.ExecuteAsync(
          "user.CreateUser",
          new
          {
              Name = user.Id,
              DisplayName = user.DisplayName,
              Platform = user.LoginPlatform.ToString()
          },
          commandType: CommandType.StoredProcedure);
    }

    public async Task<User?> ReadUser(string id)
    {
        using var connection = new SqlConnection(connectionString);
        var results = await connection.QueryAsync<User>(
          "user.ReadUser",
          new { Name = id },
          commandType: CommandType.StoredProcedure);

        return results.FirstOrDefault();
    }
}

public interface IUserRepository
{
    Task CreateUser(User user);
    Task<User?> ReadUser(string id);
}