From b6e78e4950e56930352f9d5cb7d24231dc2118f7 Mon Sep 17 00:00:00 2001
From: Kevin MONDEJAR <kemondejar>
Date: Tue, 25 Mar 2025 14:01:21 +0100
Subject: [PATCH] Generic mappers (to use in extention methode)

---
 WF_EF_Api/Shared/Mapper.cs | 47 ++++++++++++++++++++++++++++++++++++++
 1 file changed, 47 insertions(+)
 create mode 100644 WF_EF_Api/Shared/Mapper.cs

diff --git a/WF_EF_Api/Shared/Mapper.cs b/WF_EF_Api/Shared/Mapper.cs
new file mode 100644
index 0000000..890c8d3
--- /dev/null
+++ b/WF_EF_Api/Shared/Mapper.cs
@@ -0,0 +1,47 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Shared
+{
+    public class Mapper<T,U> where T : class
+                             where U : class
+    {
+        readonly HashSet<Tuple<T, U>> mapper = new HashSet<Tuple<T, U>>();
+
+        public bool AddMapping(T t, U u)
+        {
+            var mapping = new Tuple<T, U>(t, u);
+            if (mapper.Contains(mapping)) return false;
+            mapper.Add(mapping);
+            return true;
+        }
+
+        public T? GetT(U u)
+        {
+            var result = mapper.Where(tuple => ReferenceEquals(tuple.Item2, u));
+            if (result.Count() != 1)
+            {
+                return null;
+            }
+            return result.First().Item1;
+        }
+
+        public U? GetU(T t)
+        {
+            var result = mapper.Where(tuple => ReferenceEquals(tuple.Item1, t));
+            if (result.Count() != 1)
+            {
+                return null;
+            }
+            return result.First().Item2;
+        }
+
+        public void Reset()
+        {
+            mapper.Clear();
+        }
+    }
+}