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-rw-r--r--src/FSM.hpp32
1 files changed, 32 insertions, 0 deletions
diff --git a/src/FSM.hpp b/src/FSM.hpp
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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