Add project files

src/ChainOfResponssibility/Validators/UserEntities/Infrastructure/UserRepository.cs

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+using System;
+using System.Collections.Generic;
+using System.Linq;
+
+namespace ChainOfResponssibility.Validators.UserEntities
+{
+    public class UserRepository
+    {
+        List<User> users;
+        public UserRepository()
+        {
+            users = new List<User>();
+            users.Add(new User { ID = 1, Email = "a@a.a", TenantId = 1, UserName = "a", Rights = Rights.Create | Rights.Update });
+            users.Add(new User { ID = 2, Email = "b@a.a", TenantId = 1, UserName = "b", Rights = Rights.Read});
+            users.Add(new User { ID = 2, Email = "c@a.a", TenantId = 2, UserName = "c", Rights = Rights.Create | Rights.Update | Rights.Read | Rights.Delete });
+        }
+
+        public User Get(string email)
+        {
+            return users.First(u => u.Email == email);
+        }
+
+        public bool Exists(string email)
+        {
+            return users.Any(u => u.Email.Equals(email, StringComparison.OrdinalIgnoreCase));
+        }
+
+        public bool Exists(int id)
+        {
+            return users.Any(u => u.ID == id);
+        }
+
+        public void Add(User user)
+        {
+            lock (users)
+            {
+                int maxId = users.Max(u => u.ID);
+                user.ID = maxId + 1;
+                users.Add(user);
+            }
+            
+        }
+
+        public void Update(User user)
+        {
+            User dbUser = users.First(u => u.ID == user.ID);
+
+            dbUser.Email = user.Email;
+            dbUser.TenantId = user.TenantId;
+            dbUser.UserName = user.UserName;
+        }
+        
+    }
+}