From 880a7b1fb233a67303ad5a4155dc459f79734762 Mon Sep 17 00:00:00 2001
From: WBoerenkamps <wrj.boerenkamps@student.avans.nl>
Date: Mon, 11 Nov 2024 10:50:40 +0100
Subject: big cleanup events + events are now structs

---
 src/crepe/api/EventManager.h | 76 ++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 76 insertions(+)
 create mode 100644 src/crepe/api/EventManager.h

(limited to 'src/crepe/api/EventManager.h')

diff --git a/src/crepe/api/EventManager.h b/src/crepe/api/EventManager.h
new file mode 100644
index 0000000..8c0685a
--- /dev/null
+++ b/src/crepe/api/EventManager.h
@@ -0,0 +1,76 @@
+#pragma once
+#include <memory>
+#include <unordered_map>
+#include <vector>
+#include <functional>
+#include <iostream>
+#include <typeindex>
+#include <type_traits>
+#include "Event.h"
+#include "EventHandler.h"
+//#include "keyCodes.h"
+
+class EventManager {
+public:
+	EventManager(const EventManager &) = delete;
+	const EventManager & operator=(const EventManager &) = delete;
+	static EventManager & get_instance() {
+		static EventManager instance;
+		return instance;
+	}
+	template <typename EventType>
+	void subscribe(EventHandler<EventType> && callback, int channel = 0);
+	void unsubscribe(std::type_index eventType, const std::string & handlerName,int channel);
+	template <typename EventType>
+	void trigger_event(const EventType & event, int channel);
+	void queue_event(std::unique_ptr<Event> && event, int channel);
+	void dispatch_events();
+
+private:
+	EventManager() = default;
+	std::vector<std::pair<std::unique_ptr<Event>, int>> events_queue;
+	std::unordered_map<std::type_index, std::vector<std::unique_ptr<IEventHandlerWrapper>>> subscribers;
+	std::unordered_map<std::type_index, std::unordered_map<int, std::vector<std::unique_ptr<IEventHandlerWrapper>>>> subscribers_by_event_id;
+};
+
+template <typename EventType>
+void EventManager::subscribe(EventHandler<EventType> && callback, int channel){
+    std::type_index event_type = typeid(EventType);
+    auto handler = std::make_unique<EventHandlerWrapper<EventType>>(callback);
+    
+    if (channel) {
+        auto & handlers_map = subscribers_by_event_id[event_type];
+        auto handlers = handlers_map.find(channel);
+        if (handlers != handlers_map.end()) {
+            handlers->second.emplace_back(std::move(handler));
+        } else {
+            handlers_map[channel].emplace_back(std::move(handler));
+        }
+    } else {
+        subscribers[event_type].emplace_back(std::move(handler));
+    }
+}
+
+template <typename EventType>
+void EventManager::trigger_event(const EventType & event, int eventId) {
+    std::type_index event_type = std::type_index(typeid(EventType));
+    
+    if (eventId > 0) {
+        auto handlers_it = subscribers_by_event_id[event_type].find(eventId);
+        if (handlers_it != subscribers_by_event_id[event_type].end()) {
+            auto & callbacks = handlers_it->second;
+            for (auto it = callbacks.begin(); it != callbacks.end();) {
+                if ((*it)->exec(event)) {
+                    it = callbacks.erase(it);
+                } else {
+                    ++it;
+                }
+            }
+        }
+    } else {
+        auto & handlers = subscribers[event_type];
+        for (auto & handler : handlers) {
+            handler->exec(event);
+        }
+    }
+}
-- 
cgit v1.2.3