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Shared/Models/Stateless/Id.cs

@@ -0,0 +1,20 @@
+namespace View_by_Distance.Shared.Models.Stateless;
+
+internal abstract class Id
+{
+
+    internal static bool NameWithoutExtensionIsIdFormat(string fileNameWithoutExtension)
+    {
+        bool result;
+        int intMinValueLength = int.MinValue.ToString().Length;
+        if (fileNameWithoutExtension.Length < 5 || fileNameWithoutExtension.Length > intMinValueLength)
+            result = false;
+        else
+        {
+            bool skipOneAllAreNumbers = fileNameWithoutExtension[1..].All(l => char.IsNumber(l));
+            result = (skipOneAllAreNumbers && fileNameWithoutExtension[0] == '-') || (skipOneAllAreNumbers && char.IsNumber(fileNameWithoutExtension[0]));
+        }
+        return result;
+    }
+
+}