Initial structure

src/game/Core/EventBroker.cpp

@@ -0,0 +1,85 @@
+/*
+	This file is part of Daydream Engine.
+	Copyright 2014 Adam Byléhn, Tobias Dahl, Simon Holmberg, Viktor Ljung
+	
+	Daydream Engine is free software: you can redistribute it and/or modify
+	it under the terms of the GNU Lesser General Public License as published by
+	the Free Software Foundation, either version 3 of the License, or
+	(at your option) any later version.
+	
+	Daydream Engine is distributed in the hope that it will be useful,
+	but WITHOUT ANY WARRANTY; without even the implied warranty of
+	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+	GNU Lesser General Public License for more details.
+	
+	You should have received a copy of the GNU Lesser General Public License
+	along with Daydream Engine.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#include "PrecompiledHeader.h"
+#include "Core/EventBroker.h"
+
+dd::BaseEventRelay::~BaseEventRelay()
+{
+	if (m_Broker != nullptr)
+	{
+		m_Broker->Unsubscribe(*this);
+	}
+}
+
+void dd::EventBroker::Unsubscribe(BaseEventRelay &relay) // ?
+{
+	auto contextIt = m_ContextRelays.find(relay.m_ContextTypeName);
+	if (contextIt == m_ContextRelays.end())
+		return;
+
+	auto eventRelays = contextIt->second;
+
+	auto itpair = eventRelays.equal_range(relay.m_EventTypeName);
+	for (auto it = itpair.first; it != itpair.second; ++it)
+	{
+		if (it->second == &relay)
+		{
+			eventRelays.erase(it);
+			break;
+		}
+	}
+}
+
+void dd::EventBroker::Subscribe(BaseEventRelay &relay)
+{
+	relay.m_Broker = this;
+	m_ContextRelays[relay.m_ContextTypeName].insert(std::make_pair(relay.m_EventTypeName, &relay));
+}
+
+int dd::EventBroker::Process(std::string contextTypeName)
+{
+	auto it = m_ContextRelays.find(contextTypeName);
+	if (it == m_ContextRelays.end())
+		return 0;
+
+	EventRelays_t &relays = it->second;
+
+	int eventsProcessed = 0;
+	for (auto &pair : *m_EventQueueRead)
+	{
+		std::string &eventTypeName = pair.first;
+		std::shared_ptr<Event> event = pair.second;
+
+		auto itpair = relays.equal_range(eventTypeName);
+		for (auto it2 = itpair.first; it2 != itpair.second; ++it2)
+		{
+			auto relay = it2->second;
+			relay->Receive(event);
+			eventsProcessed++;
+		}
+	}
+
+	return eventsProcessed;
+}
+
+void dd::EventBroker::Clear()
+{
+	std::swap(m_EventQueueRead, m_EventQueueWrite);
+	m_EventQueueWrite->clear();
+}