Setup codebase

Trenser.VehicleServiceSystem/Trenser.VehicleServiceSystem/core/patterns/Subject.h

@@ -0,0 +1,17 @@
+#pragma once
+#include <string>
+#include "Map.h"
+
+class User;
+class Notification;
+
+class Subject
+{
+protected:
+    util::Map<std::string, User*> m_observers;
+public:
+    virtual ~Subject() = default;
+    virtual void attach(User* user) = 0;
+    virtual void detach(User* user) = 0;
+    virtual void notify(Notification* notification) = 0;
+};