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