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Kreta.BusinessLogic/Extensions/NameExtensions.cs

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+using System;
+using System.Text.RegularExpressions;
+using Kreta.Core;
+
+namespace Kreta.BusinessLogic.Extensions
+{
+    public static class NameExtensions
+    {
+        public static string CleanElotag(this string elotag)
+        {
+            var trimmed = elotag.ReplaceMultipleSpacesAndTrim();
+
+            if (string.IsNullOrWhiteSpace(trimmed))
+            {
+                return trimmed;
+            }
+
+            return GetStringWithoutDuplicatedDots(trimmed);
+        }
+
+        public static string GetNevSorrendben(string nevSorrend, string nevElotag, string vezetekNev, string keresztNev)
+            => $"{nevElotag} {(string.Equals(nevSorrend, "F", StringComparison.OrdinalIgnoreCase) ? $"{vezetekNev} {keresztNev}" : $"{keresztNev} {vezetekNev}")}".ReplaceMultipleSpacesAndTrim();
+
+        private static string GetStringWithoutDuplicatedDots(string text)
+            => NullableRegexReplace(text, @"\.+", ".");
+
+        private static string NullableRegexReplace(this string text, string pattern, string replacement)
+            => string.IsNullOrWhiteSpace(text) ? text : Regex.Replace(text, pattern, replacement);
+    }
+}