working dispatcher + factory

include/sp/protocol/MessageDispatcherImpl.inl

@@ -0,0 +1,43 @@
+#pragma once
+
+#include <algorithm>
+#include <cassert>
+
+namespace sp {
+
+template <typename MessageBase>
+void MessageDispatcher<MessageBase>::RegisterHandler(MessageIdType a_MessageType, MessageHandler* a_Handler) {
+	assert(a_Handler);
+	auto found = std::find(m_Handlers[a_MessageType].begin(), m_Handlers[a_MessageType].end(), a_Handler);
+	if (found == m_Handlers[a_MessageType].end())
+		m_Handlers[a_MessageType].push_back(a_Handler);
+}
+
+template <typename MessageBase>
+void MessageDispatcher<MessageBase>::UnregisterHandler(MessageIdType a_MessageType, MessageHandler* a_Handler) {
+	auto found = std::find(m_Handlers[a_MessageType].begin(), m_Handlers[a_MessageType].end(), a_Handler);
+	if (found != m_Handlers[a_MessageType].end())
+		m_Handlers[a_MessageType].erase(found);
+}
+
+template <typename MessageBase>
+void MessageDispatcher<MessageBase>::UnregisterHandler(MessageHandler* a_Handler) {
+	for (auto& pair : m_Handlers) {
+		if (pair.second.empty())
+			continue;
+
+		MessageIdType type = pair.first;
+
+		pair.second.erase(std::remove(pair.second.begin(), pair.second.end(), a_Handler), pair.second.end());
+	}
+}
+
+template <typename MessageBase>
+void MessageDispatcher<MessageBase>::Dispatch(const MessageBase& a_Message) {
+	MessageIdType type = a_Message.GetId();
+	for (auto& handler : m_Handlers[type]) {
+		a_Message.Dispatch(*handler);
+	}
+}
+
+}  // namespace sp