refractoring backend

2024-12-09 18:43:03 +02:00
parent 80040638a6
commit 2db33bb966
53 changed files with 814 additions and 2389 deletions
@@ -0,0 +1,126 @@
+using System.Net;
+using MySql.Data.MySqlClient;
+using Newtonsoft.Json;
+
+namespace TimelogBackend;
+
+// there should be a better way to deal with data comming from sql
+public class Log
+{
+    public object? FName { get; set; }
+    public object? LName { get; set; }
+    public object? Mail { get; set; }
+    public object? Name { get; set; }
+    public object? Time { get; set; }
+    public object? Date { get; set; }
+    public object? User { get; set; }
+}
+
+public class Getall : Route
+{
+    private static string ConstructQuery(
+        string from,
+        string to,
+        string order,
+        string offset,
+        string sortby
+    )
+    {
+        string mainQuery =
+            @"SELECT u.f_name,u.l_name,u.mail,p.name,t.time,t.date,t.user 
+                                     FROM Timelog t 
+                                     INNER JOIN Project p ON p.id=t.project 
+                                     INNER JOIN User u ON u.id=t.user ";
+        // this shenanigan is needed to remove the "" around group by
+        string offsetQuery = " LIMIT 10 OFFSET " + offset + ";";
+        // depending on the incoming parameters construct a Query
+        if (!string.IsNullOrEmpty(to) && !string.IsNullOrEmpty(from))
+        {
+            mainQuery += AddWhereClause(from, to);
+        }
+        if (!string.IsNullOrEmpty(sortby))
+        {
+            mainQuery += AddSortBy(sortby, order);
+        }
+        if (!int.TryParse(offset, out int myInt) || myInt < 0)
+            throw new Exception("Incorect offset");
+
+        return mainQuery + offsetQuery;
+    }
+
+    private static string AddWhereClause(string from, string to)
+    {
+        if (!ValidateDate(to) || !ValidateDate(from))
+        {
+            throw new Exception("Incorrect date format");
+        }
+        string whereQuery = " WHERE t.date BETWEEN @from AND @to ";
+        return whereQuery;
+    }
+
+    private static string AddSortBy(string sortby, string order)
+    {
+        List<string> validSorting = ["f_name", "l_name", "mail", "time", "date", "user", "project"];
+        if (!validSorting.Contains(sortby))
+        {
+            throw new Exception("Incorrect sorting value");
+        }
+        string orderQuery = " ORDER BY " + sortby + " " + order;
+        return orderQuery;
+    }
+
+    private static List<Log> ExtractDataFromDB(MySqlCommand cmd)
+    {
+        using MySqlConnection conn = new(connectionString);
+        conn.Open();
+        cmd.Connection = conn;
+        // execute query and read results
+        MySqlDataReader reader = cmd.ExecuteReader();
+
+        List<Log> entries = [];
+        while (reader.Read())
+        {
+            entries.Add(
+                new Log
+                {
+                    FName = reader["f_name"],
+                    LName = reader["l_name"],
+                    User = reader["user"],
+                    Date = reader["date"],
+                    Name = reader["name"],
+                    Time = reader["time"],
+                    Mail = reader["mail"],
+                }
+            );
+        }
+        return entries;
+    }
+
+    public static void HandleRequest(HttpListenerRequest request, HttpListenerResponse response)
+    {
+        try
+        {
+            // extract data from url
+            var queryString = request.QueryString;
+            string? from = queryString["from"] ?? "";
+            string? to = queryString["to"] ?? "";
+            string? sortby = queryString["sortby"] ?? "";
+            string? offset = queryString["offset"] ?? "";
+            string? order = queryString["order"] ?? "";
+            order = order == "true" ? "ASC" : "DESC";
+            // SQL
+            MySqlCommand cmd = new(ConstructQuery(from, to, order, offset, sortby));
+            cmd.Parameters.AddWithValue("@from", from);
+            cmd.Parameters.AddWithValue("@to", to);
+            var entries = ExtractDataFromDB(cmd);
+
+            // serialize JSON
+            string jsonResponse = JsonConvert.SerializeObject(entries);
+            SendSuccess(response, jsonResponse);
+        }
+        catch (Exception ex)
+        {
+            SendError(response, ex);
+        }
+    }
+}