first commit

sql2/Repositories/UserRepo.cs

@@ -0,0 +1,69 @@
+using MySql.Data.MySqlClient;
+using PaymentLogs.Domain;
+using PaymentLogs.Utils;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Runtime.InteropServices;
+using System.Security;
+using System.Security.Cryptography;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace PaymentLogs.Repositories
+{
+    internal class UserRepo : Repo<string, User>
+    {
+
+        public override void Load()
+        {
+            DataBase db = new DataBase();
+            _data.Clear();
+            string sql = " SELECT * FROM usrs  ";
+            db.openConnection();
+            MySqlCommand cmd = new MySqlCommand(sql, db.getConnection());
+            MySqlDataReader reader = cmd.ExecuteReader();
+
+            while (reader.Read()) {
+                User user = new User() { Login = reader.GetString("login"), PasswordHash = StringUtils.ConvertToSecureString(reader.GetString("password_hash")) };
+                _data[user.Login] = user;
+            }
+            db.closeConnection();
+        }
+
+
+
+        public void RegisterUser(string _login, string _password)
+        {
+            User user = new User() { Login =  _login.ToLower(), PasswordHash = StringUtils.ConvertToSecureString(StringUtils.SHA256_hash(_password)) };
+            Save(user);
+        }
+
+        public Boolean HasUser(string _login)
+        {
+            return _data.ContainsKey(_login.ToLower());
+        }
+
+
+        private void Save(User user)
+        {
+            DataBase db = new DataBase();
+            db.openConnection();
+            string hash = StringUtils.SecureStringToString(user.PasswordHash);
+            string sql = $" INSERT INTO `usrs` (`login`, `password_hash`) VALUES ('{user.Login}','{hash}') " +
+                $"ON DUPLICATE KEY UPDATE `password_hash`='{hash}'";
+            MySqlCommand cmd = new MySqlCommand(sql, db.getConnection());
+            cmd.ExecuteNonQuery();
+            db.closeConnection();
+        }
+
+
+        public override void Save()
+        {
+            foreach(User user in _data.Values)
+            {
+                Save(user);
+            }
+        }
+    }
+}