Sicherung

Config.Net/Core/FlatArrays.cs

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+using System;
+using System.Collections.Generic;
+using System.Text;
+using Config.Net.Core;
+using Config.Net.TypeParsers;
+
+namespace Config.Net.Core
+{
+   /// <summary>
+   /// Helper class to implement flat arrays
+   /// </summary>
+   public static class FlatArrays
+   {
+      public static bool IsArrayLength(string? key, Func<string, string?> getValue, out int length)
+      {
+         if (!OptionPath.TryStripLength(key, out key))
+         {
+            length = 0;
+            return false;
+         }
+
+         string? value = key == null ? null : getValue(key);
+         if (value == null)
+         {
+            length = 0;
+            return false;
+         }
+
+         if (!StringArrayParser.TryParse(value, out string[]? ar))
+         {
+            length = 0;
+            return false;
+         }
+
+         length = ar?.Length ?? 0;
+         return true;
+      }
+
+      public static bool IsArrayElement(string? key, Func<string, string?> getValue, out string? value)
+      {
+         if(!OptionPath.TryStripIndex(key, out key, out int index))
+         {
+            value = null;
+            return false;
+         }
+
+         string? arrayString = key == null ? null : getValue(key);
+         if (!StringArrayParser.TryParse(arrayString, out string[]? array) || index >= array?.Length)
+         {
+            value = null;
+            return false;
+         }
+
+         value = array?[index] ?? null;
+         return true;
+      }
+   }
+}