refractoring backend

backendCS/routes/Getuser.cs

@@ -0,0 +1,59 @@
+using System.Dynamic;
+using System.Net;
+using MySql.Data.MySqlClient;
+using Newtonsoft.Json;
+
+namespace TimelogBackend;
+
+public class Getuser : Route
+{
+    private static dynamic ExtractDataFromDB(MySqlCommand cmd)
+    {
+        using MySqlConnection conn = new(connectionString);
+        conn.Open();
+        cmd.Connection = conn;
+        // execute query and read results
+        MySqlDataReader reader = cmd.ExecuteReader();
+        dynamic expando = new ExpandoObject();
+        while (reader.Read())
+        {
+            ((IDictionary<string?, object>)expando)[reader["name"].ToString()] = reader[
+                "SUM(t.time)"
+            ];
+        }
+        return expando;
+    }
+
+    public static void HandleRequest(HttpListenerRequest request, HttpListenerResponse response)
+    {
+        try
+        {
+            var queryString = request.QueryString;
+            string? userid = queryString["userid"];
+            if (string.IsNullOrEmpty(userid))
+            {
+                throw new Exception("Missing userid");
+            }
+            // prepare SQL query
+            string query =
+                @"SELECT p.name, SUM(t.time)
+                            FROM Timelog t 
+                            INNER JOIN Project p ON p.id=t.project 
+                            INNER JOIN User u ON u.id=t.user 
+                            WHERE User = @userid
+                            GROUP BY name;";
+            MySqlCommand cmd = new(query);
+            cmd.Parameters.AddWithValue("@userid", userid);
+
+            var expando = ExtractDataFromDB(cmd);
+            // serialize JSON
+            string jsonResponse = JsonConvert.SerializeObject(expando);
+            // prepare response
+            SendSuccess(response, jsonResponse);
+        }
+        catch (Exception ex)
+        {
+            SendError(response, ex);
+        }
+    }
+}