From f7decf41d8d0062901cd39c42a3669a80537c7df Mon Sep 17 00:00:00 2001
From: LaG1924 <12997935+LaG1924@users.noreply.github.com>
Date: Thu, 3 Aug 2017 20:03:59 +0500
Subject: 2017-08-03

---
 src/FSM.hpp | 32 ++++++++++++++++++++++++++++++++
 1 file changed, 32 insertions(+)
 create mode 100644 src/FSM.hpp

(limited to 'src/FSM.hpp')

diff --git a/src/FSM.hpp b/src/FSM.hpp
new file mode 100644
index 0000000..9570e26
--- /dev/null
+++ b/src/FSM.hpp
@@ -0,0 +1,32 @@
+#pragma once
+
+#include <utility>
+#include <functional>
+#include <map>
+
+template<class T>
+class FSM {
+	T previousState;
+	T &state;
+	std::map<Transaction, std::function<void()>> handlers;
+public:
+	using Transaction = std::pair<T, T>;
+
+	FSM(T &value) : state(value), previousState(value) {}
+
+	~FSM() = default;
+
+	void Update() {
+		auto handler = handlers[Transaction{previousState, state}];
+		if (handler)
+			handler();
+	}
+
+	void RegisterHandler(T state, std::function<void()> handler) {
+		handlers[Transaction{state, state}] = handler;
+	}
+
+	void RegisterTransactionHandler(Transaction transaction, std::function<void()> handler) {
+		handlers[transaction] = handler;
+	}
+};
\ No newline at end of file
-- 
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