1 files changed, 48 insertions, 0 deletions
diff --git a/src/crepe/api/EventManager.hpp b/src/crepe/api/EventManager.hpp
new file mode 100644
index 0000000..b2a94bd
--- /dev/null
+++ b/src/crepe/api/EventManager.hpp
@@ -0,0 +1,48 @@
+#include "EventManager.h"
+
+namespace crepe {
+
+template <typename EventType>
+subscription_t EventManager::subscribe(const EventHandler<EventType> & callback, int channel) {
+	subscription_counter++;
+	std::type_index event_type = typeid(EventType);
+	std::unique_ptr<EventHandlerWrapper<EventType>> handler
+		= std::make_unique<EventHandlerWrapper<EventType>>(callback);
+	std::vector<CallbackEntry> & handlers = this->subscribers[event_type];
+	handlers.emplace_back(CallbackEntry{
+		.callback = std::move(handler), .channel = channel, .id = subscription_counter});
+	return subscription_counter;
+}
+
+template <typename EventType>
+void EventManager::queue_event(const EventType & event, int channel) {
+	static_assert(std::is_base_of<Event, EventType>::value,
+				  "EventType must derive from Event");
+	std::type_index event_type = typeid(EventType);
+
+	auto event_ptr = std::make_unique<EventType>(event);
+
+	this->events_queue.push_back(
+		QueueEntry{.event = std::move(event_ptr), .channel = channel, .type = event_type});
+}
+
+template <typename EventType>
+void EventManager::trigger_event(const EventType & event, int channel) {
+	std::type_index event_type = typeid(EventType);
+
+	auto handlers_it = this->subscribers.find(event_type);
+	if (handlers_it != this->subscribers.end()) {
+		const std::vector<CallbackEntry> & handlers = handlers_it->second;
+
+		for (const CallbackEntry & handler : handlers) {
+			if (handler.channel != channel && handler.channel != CHANNEL_ALL) {
+				continue;
+			}
+			if (handler.callback->exec(event)) {
+				break;
+			}
+		}
+	}
+}
+
+} // namespace crepe