Published - Added Mapping shortcut,

added leveled limits, container bug fix,

Shared/Models/Stateless/Methods/Item.cs

@@ -3,6 +3,28 @@ namespace View_by_Distance.Shared.Models.Stateless.Methods;
 internal abstract class Item
 {
 
-    internal static double GetDefaultValue() => throw new Exception();
+    internal static (List<Models.Item>, int) GetMerged(List<Models.Item> itemsA, List<Models.Item> itemsB)
+    {
+        int result = 0;
+        List<Models.Item> results = new();
+        List<string> collection = new();
+        foreach (Models.Item item in itemsA)
+        {
+            if (item.ImageFileHolder is null)
+                continue;
+            results.Add(item);
+            collection.Add(item.ImageFileHolder.FullName);
+        }
+        foreach (Models.Item item in itemsB)
+        {
+            if (item.ImageFileHolder is null)
+                continue;
+            if (collection.Contains(item.ImageFileHolder.FullName))
+                continue;
+            result++;
+            results.Add(item);
+        }
+        return new(results, result);
+    }
 
 }