[file:] initial DataImport (unfinished, stable)

DataImport.cs

@@ -0,0 +1,84 @@
+using System;
+using System.IO;
+
+namespace Logof_Client;
+
+public class DataImport
+{
+    public static (bool, KasAddressList) ImportKasAddressList(string pathToCsv, char separator = ',')
+    {
+        if (!File.Exists(pathToCsv))
+        {
+            Console.WriteLine($"File not found: {pathToCsv}");
+            return (false, null);
+        }
+
+        using var reader = new StreamReader(pathToCsv);
+        var headerLine = reader.ReadLine();
+        if (headerLine == null)
+        {
+            Console.WriteLine("File is empty.");
+            return (false, null);
+        }
+
+        var imported = new KasAddressList();
+        while (!reader.EndOfStream)
+        {
+            var line = reader.ReadLine();
+            if (string.IsNullOrWhiteSpace(line))
+                continue;
+
+            var parts = line.Split(separator);
+
+            if (parts.Length < 24)
+            {
+                Console.WriteLine($"No enough columns in line: {line}");
+                continue;
+            }
+
+            try
+            {
+                var person = new KasPerson(
+                    ParseInt(parts[0]),
+                    parts[1],
+                    parts[2],
+                    parts[3],
+                    parts[4],
+                    parts[5],
+                    parts[6],
+                    parts[7],
+                    parts[8],
+                    parts[9],
+                    ParseInt(parts[10]),
+                    parts[11],
+                    parts[12],
+                    parts[13],
+                    parts[14],
+                    parts[15],
+                    parts[16],
+                    parts[17],
+                    parts[18],
+                    parts[19],
+                    parts[20],
+                    parts[21],
+                    parts[22],
+                    parts[23]
+                );
+                imported.KasPersons.Add(person);
+            }
+            catch (Exception ex)
+            {
+                Console.WriteLine($"Error while parsing line: {line} - {ex.Message}");
+                Console.WriteLine($"{ex.StackTrace}");
+                return (false, null);
+            }
+        }
+
+        return (true, imported);
+    }
+
+    private static int ParseInt(string input)
+    {
+        return int.TryParse(input, out var result) ? result : 0;
+    }
+}