8 files changed, 574 insertions, 0 deletions

diff --git a/mwe/events/src/event.cpp b/mwe/events/src/event.cpp
new file mode 100644
index 0000000..c9201d0
--- /dev/null
+++ b/mwe/events/src/event.cpp
@@ -0,0 +1,52 @@
+#include "event.h"
+#include "keyCodes.h"
+// Event class methods
+Event::Event(std::string eventType) { eventData["eventType"] = eventType; }
+
+void Event::addArgument(const std::string & key,
+						const std::variant<int, std::string, float> & value) {
+	eventData[key] = value;
+}
+
+std::variant<int, std::string, float>
+Event::getArgument(const std::string & key) const {
+	return eventData.at(key);
+}
+
+std::string Event::getType() const {
+	return std::get<std::string>(eventData.at("eventType"));
+}
+std::string Event::toString() const { return std::to_string(getEventType()); }
+bool Event::getHandled() const { return isHandled; }
+
+void Event::markHandled() { isHandled = true; }
+
+// KeyPressedEvent class methods
+KeyPressedEvent::KeyPressedEvent(int keycode)
+	: Event("KeyPressedEvent"), key(keycode), repeatCount(0) {}
+
+Keycode KeyPressedEvent::getKeyCode() const { return key; }
+
+int KeyPressedEvent::getRepeatCount() const { return repeatCount; }
+
+// KeyReleasedEvent class methods
+KeyReleasedEvent::KeyReleasedEvent(int keycode)
+	: Event("KeyReleasedEvent"), key(keycode) {}
+
+Keycode KeyReleasedEvent::getKeyCode() const { return key; }
+
+// MousePressedEvent class methods
+MousePressedEvent::MousePressedEvent(int mouseX, int mouseY)
+	: Event("MousePressedEvent"), mouseX(mouseX), mouseY(mouseY) {}
+
+std::pair<int, int> MousePressedEvent::getMousePosition() const {
+	return {mouseX, mouseY};
+}
+
+//Collision event
+CollisionEvent::CollisionEvent(Collision collision)
+	: collisionData(collision), Event("CollisionEvent") {}
+
+Collision CollisionEvent::getCollisionData() const {
+	return this->collisionData;
+}
diff --git a/mwe/events/src/eventHandler.cpp b/mwe/events/src/eventHandler.cpp
new file mode 100644
index 0000000..7fb8d70
--- /dev/null
+++ b/mwe/events/src/eventHandler.cpp
@@ -0,0 +1,2 @@
+#include "eventHandler.h"
+void IEventHandlerWrapper::exec(const Event & e) { call(e); }
diff --git a/mwe/events/src/eventManager.cpp b/mwe/events/src/eventManager.cpp
new file mode 100644
index 0000000..34a093d
--- /dev/null
+++ b/mwe/events/src/eventManager.cpp
@@ -0,0 +1,130 @@
+#include "eventManager.h"
+
+void EventManager::shutdown() { subscribers.clear(); }
+
+void EventManager::subscribe(int eventType,
+							 std::unique_ptr<IEventHandlerWrapper> && handler,
+							 int eventId) {
+	if (eventId) {
+		std::unordered_map<
+			int, std::unordered_map<
+					 int, std::vector<std::unique_ptr<IEventHandlerWrapper>>>>::
+			iterator subscribers
+			= subscribersByEventId.find(eventType);
+
+		if (subscribers != subscribersByEventId.end()) {
+			std::unordered_map<
+				int, std::vector<std::unique_ptr<IEventHandlerWrapper>>> &
+				handlersMap
+				= subscribers->second;
+			std::unordered_map<
+				int,
+				std::vector<std::unique_ptr<IEventHandlerWrapper>>>::iterator
+				handlers
+				= handlersMap.find(eventId);
+			if (handlers != handlersMap.end()) {
+				handlers->second.emplace_back(std::move(handler));
+				return;
+			}
+		}
+		subscribersByEventId[eventType][eventId].emplace_back(
+			std::move(handler));
+
+	} else {
+		auto & handlers = subscribers[eventType];
+		handlers.emplace_back(std::move(handler));
+	}
+}
+
+void EventManager::unsubscribe(int eventType, const std::string & handlerName,
+							   int eventId) {
+	if (eventId) {
+		std::unordered_map<
+			int, std::unordered_map<
+					 int, std::vector<std::unique_ptr<IEventHandlerWrapper>>>>::
+			iterator subscriberList
+			= subscribersByEventId.find(eventType);
+		if (subscriberList != subscribersByEventId.end()) {
+			std::unordered_map<
+				int, std::vector<std::unique_ptr<IEventHandlerWrapper>>> &
+				handlersMap
+				= subscriberList->second;
+			std::unordered_map<
+				int,
+				std::vector<std::unique_ptr<IEventHandlerWrapper>>>::iterator
+				handlers
+				= handlersMap.find(eventId);
+			if (handlers != handlersMap.end()) {
+				std::vector<std::unique_ptr<IEventHandlerWrapper>> & callbacks
+					= handlers->second;
+				for (std::vector<
+						 std::unique_ptr<IEventHandlerWrapper>>::iterator it
+					 = callbacks.begin();
+					 it != callbacks.end(); ++it) {
+					if (it->get()->getType() == handlerName) {
+						it = callbacks.erase(it);
+						return;
+					}
+				}
+			}
+		}
+	} else {
+		std::unordered_map<
+			int, std::vector<std::unique_ptr<IEventHandlerWrapper>>>::iterator
+			handlersIt
+			= subscribers.find(eventType);
+		if (handlersIt != subscribers.end()) {
+			std::vector<std::unique_ptr<IEventHandlerWrapper>> & handlers
+				= handlersIt->second;
+			for (std::vector<std::unique_ptr<IEventHandlerWrapper>>::iterator it
+				 = handlers.begin();
+				 it != handlers.end(); ++it) {
+				if (it->get()->getType() == handlerName) {
+					it = handlers.erase(it);
+					return;
+				}
+			}
+		}
+	}
+}
+
+void EventManager::triggerEvent(const Event & event_, int eventId) {
+	if (eventId > 0) {
+		auto handlersIt
+			= subscribersByEventId[event_.getEventType()].find(eventId);
+		if (handlersIt != subscribersByEventId[event_.getEventType()].end()) {
+			std::vector<std::unique_ptr<IEventHandlerWrapper>> & callbacks
+				= handlersIt->second;
+			for (auto it = callbacks.begin(); it != callbacks.end();) {
+				(*it)->exec(event_);
+				if ((*it)->isDestroyOnSuccess()) {
+					it = callbacks.erase(it);
+				} else {
+					++it;
+				}
+			}
+		}
+	} else {
+		auto & handlers = subscribers[event_.getEventType()];
+		for (std::unique_ptr<IEventHandlerWrapper> & handler : handlers) {
+			handler->exec(event_);
+		}
+	}
+}
+
+void EventManager::queueEvent(std::unique_ptr<Event> && event_, int eventId) {
+	eventsQueue.emplace_back(std::move(event_), eventId);
+}
+
+void EventManager::dispatchEvents() {
+	for (std::vector<std::pair<std::unique_ptr<Event>, int>>::iterator eventIt
+		 = eventsQueue.begin();
+		 eventIt != eventsQueue.end();) {
+		if (!eventIt->first.get()->getHandled()) {
+			triggerEvent(*eventIt->first.get(), eventIt->second);
+			eventIt = eventsQueue.erase(eventIt);
+		} else {
+			++eventIt;
+		}
+	}
+}
diff --git a/mwe/events/src/keyCodes.cpp b/mwe/events/src/keyCodes.cpp
new file mode 100644
index 0000000..5f3aa96
--- /dev/null
+++ b/mwe/events/src/keyCodes.cpp
@@ -0,0 +1,139 @@
+#include "keyCodes.h"
+
+const std::unordered_map<SDL_Keycode, Keycode> sdlToCustom
+	= {{SDLK_SPACE, Space},
+	   {SDLK_QUOTE, Apostrophe},
+	   {SDLK_COMMA, Comma},
+	   {SDLK_MINUS, Minus},
+	   {SDLK_PERIOD, Period},
+	   {SDLK_SLASH, Slash},
+
+	   {SDLK_0, D0},
+	   {SDLK_1, D1},
+	   {SDLK_2, D2},
+	   {SDLK_3, D3},
+	   {SDLK_4, D4},
+	   {SDLK_5, D5},
+	   {SDLK_6, D6},
+	   {SDLK_7, D7},
+	   {SDLK_8, D8},
+	   {SDLK_9, D9},
+
+	   {SDLK_SEMICOLON, Semicolon},
+	   {SDLK_EQUALS, Equal},
+
+	   {SDLK_a, A},
+	   {SDLK_b, B},
+	   {SDLK_c, C},
+	   {SDLK_d, D},
+	   {SDLK_e, E},
+	   {SDLK_f, F},
+	   {SDLK_g, G},
+	   {SDLK_h, H},
+	   {SDLK_i, I},
+	   {SDLK_j, J},
+	   {SDLK_k, K},
+	   {SDLK_l, L},
+	   {SDLK_m, M},
+	   {SDLK_n, N},
+	   {SDLK_o, O},
+	   {SDLK_p, P},
+	   {SDLK_q, Q},
+	   {SDLK_r, R},
+	   {SDLK_s, S},
+	   {SDLK_t, T},
+	   {SDLK_u, U},
+	   {SDLK_v, V},
+	   {SDLK_w, W},
+	   {SDLK_x, X},
+	   {SDLK_y, Y},
+	   {SDLK_z, Z},
+
+	   {SDLK_LEFTBRACKET, LeftBracket},
+	   {SDLK_BACKSLASH, Backslash},
+	   {SDLK_RIGHTBRACKET, RightBracket},
+	   {SDLK_BACKQUOTE, GraveAccent},
+
+	   {SDLK_ESCAPE, Escape},
+	   {SDLK_RETURN, Enter},
+	   {SDLK_TAB, Tab},
+	   {SDLK_BACKSPACE, Backspace},
+	   {SDLK_INSERT, Insert},
+	   {SDLK_DELETE, Delete},
+	   {SDLK_RIGHT, Right},
+	   {SDLK_LEFT, Left},
+	   {SDLK_DOWN, Down},
+	   {SDLK_UP, Up},
+	   {SDLK_PAGEUP, PageUp},
+	   {SDLK_PAGEDOWN, PageDown},
+	   {SDLK_HOME, Home},
+	   {SDLK_END, End},
+
+	   {SDLK_CAPSLOCK, CapsLock},
+	   {SDLK_SCROLLLOCK, ScrollLock},
+	   {SDLK_NUMLOCKCLEAR, NumLock},
+	   {SDLK_PRINTSCREEN, PrintScreen},
+	   {SDLK_PAUSE, Pause},
+
+	   {SDLK_F1, F1},
+	   {SDLK_F2, F2},
+	   {SDLK_F3, F3},
+	   {SDLK_F4, F4},
+	   {SDLK_F5, F5},
+	   {SDLK_F6, F6},
+	   {SDLK_F7, F7},
+	   {SDLK_F8, F8},
+	   {SDLK_F9, F9},
+	   {SDLK_F10, F10},
+	   {SDLK_F11, F11},
+	   {SDLK_F12, F12},
+	   {SDLK_F13, F13},
+	   {SDLK_F14, F14},
+	   {SDLK_F15, F15},
+	   {SDLK_F16, F16},
+	   {SDLK_F17, F17},
+	   {SDLK_F18, F18},
+	   {SDLK_F19, F19},
+	   {SDLK_F20, F20},
+	   {SDLK_F21, F21},
+	   {SDLK_F22, F22},
+	   {SDLK_F23, F23},
+	   {SDLK_F24, F24},
+
+	   {SDLK_KP_0, KP0},
+	   {SDLK_KP_1, KP1},
+	   {SDLK_KP_2, KP2},
+	   {SDLK_KP_3, KP3},
+	   {SDLK_KP_4, KP4},
+	   {SDLK_KP_5, KP5},
+	   {SDLK_KP_6, KP6},
+	   {SDLK_KP_7, KP7},
+	   {SDLK_KP_8, KP8},
+	   {SDLK_KP_9, KP9},
+
+	   {SDLK_KP_DECIMAL, KPDecimal},
+	   {SDLK_KP_DIVIDE, KPDivide},
+	   {SDLK_KP_MULTIPLY, KPMultiply},
+	   {SDLK_KP_MINUS, KPSubtract},
+	   {SDLK_KP_PLUS, KPAdd},
+	   {SDLK_KP_ENTER, KPEnter},
+	   {SDLK_KP_EQUALS, KPEqual},
+
+	   {SDLK_LSHIFT, LeftShift},
+	   {SDLK_LCTRL, LeftControl},
+	   {SDLK_LALT, LeftAlt},
+	   {SDLK_LGUI, LeftSuper},
+
+	   {SDLK_RSHIFT, RightShift},
+	   {SDLK_RCTRL, RightControl},
+	   {SDLK_RALT, RightAlt},
+	   {SDLK_RGUI, RightSuper},
+
+	   {SDLK_MENU, Menu}};
+Keycode getCustomKey(SDL_Keycode sdlKey) {
+	auto it = sdlToCustom.find(sdlKey);
+	if (it != sdlToCustom.end()) {
+		return it->second;
+	}
+	return 0;
+}
diff --git a/mwe/events/src/loopManager.cpp b/mwe/events/src/loopManager.cpp
new file mode 100644
index 0000000..8ecb932
--- /dev/null
+++ b/mwe/events/src/loopManager.cpp
@@ -0,0 +1,87 @@
+#include "loopManager.h"
+
+LoopManager::LoopManager() {}
+void LoopManager::processInput() {
+	SDL_Event event;
+	SDL_PollEvent(&event);
+	switch (event.type) {
+		case SDL_QUIT:
+			gameRunning = false;
+			break;
+		case SDL_KEYDOWN:
+			triggerEvent(KeyPressedEvent(getCustomKey(event.key.keysym.sym)));
+			break;
+		case SDL_MOUSEBUTTONDOWN:
+			int x, y;
+			SDL_GetMouseState(&x, &y);
+			triggerEvent(MousePressedEvent(x, y));
+			break;
+	}
+}
+void LoopManager::setRunning(bool running) { this->gameRunning = running; }
+void LoopManager::fixedUpdate() {
+	//fprintf(stderr, "fixed update\n");
+}
+void LoopManager::loop() {
+	LoopTimer & timer = LoopTimer::getInstance();
+	timer.start();
+
+	while (gameRunning) {
+		timer.update();
+
+		while (timer.getLag() >= timer.getFixedDeltaTime()) {
+			processInput();
+			fixedUpdate();
+			timer.advanceFixedUpdate();
+		}
+
+		update();
+		render();
+
+		timer.enforceFrameRate();
+	}
+
+	window.destroyWindow();
+}
+void onKey(const KeyPressedEvent & e) {
+	int keyCode = e.getKeyCode();
+	std::cout << "keycode pressed: " << keyCode << std::endl;
+}
+void onMouse(const MousePressedEvent & e) {
+	fprintf(stderr, "mouse Position X: %d Y: %d\n", e.getMousePosition().first,
+			e.getMousePosition().second);
+}
+void LoopManager::setup() {
+	gameRunning = window.initWindow();
+	LoopTimer::getInstance().start();
+	LoopTimer::getInstance().setFPS(50);
+	EventHandler<KeyPressedEvent> callback = onKey;
+	subscribe<KeyPressedEvent>(callback, false);
+	EventHandler<MousePressedEvent> mouseCallback = onMouse;
+	subscribe<MousePressedEvent>(mouseCallback, false);
+	EventHandler<KeyPressedEvent> closeWindowCallback
+		= [this](const KeyPressedEvent & e) {
+			  if (e.getKeyCode() == Escape) {
+				  this->setRunning(false);
+			  }
+		  };
+	subscribe<KeyPressedEvent>(closeWindowCallback, false);
+}
+void LoopManager::render() {
+	//fprintf(stderr, "**********render********** \n");
+	if (gameRunning) {
+		//window.render(objectList);
+	}
+}
+
+void LoopManager::update() {
+	//fprintf(stderr, "**********normal update********** \n");
+	LoopTimer & timer = LoopTimer::getInstance();
+
+	float delta = timer.getDeltaTime();
+
+	// for (int i = 0; i < objectList.size(); i++) {
+	// 	objectList[i]->setX(objectList[i]->getX() + 50 * delta);
+	// 	objectList[i]->setY(objectList[i]->getY() + 50 * delta);
+	// }
+}
diff --git a/mwe/events/src/main.cpp b/mwe/events/src/main.cpp
new file mode 100644
index 0000000..f7e0766
--- /dev/null
+++ b/mwe/events/src/main.cpp
@@ -0,0 +1,82 @@
+#include "customTypes.h"
+#include "event.h"
+#include "loopManager.h"
+#include <SDL2/SDL.h>
+#include <iostream>
+#include <memory>
+class PlayerDamagedEvent : public Event {
+public:
+	PlayerDamagedEvent(int damage, int playerID)
+		: Event("PlayerDamaged"), damage(damage), playerID(playerID) {}
+
+	REGISTER_EVENT_TYPE(PlayerDamagedEvent);
+
+	int getDamage() const { return damage; }
+	int getPlayerID() const { return playerID; }
+
+private:
+	int damage;
+	int playerID;
+};
+void onPlayerDamaged(const PlayerDamagedEvent & e) {
+	std::cout << "Player " << e.getPlayerID() << " took " << e.getDamage()
+			  << " damage." << std::endl;
+}
+
+void onKeyPressed1(const KeyPressedEvent & e) {
+	int keyCode = e.getKeyCode();
+	fprintf(stderr, "first function KeyCode %d\n", keyCode);
+}
+void onKeyPressed(const KeyPressedEvent & e) {
+	int keyCode = e.getKeyCode();
+	fprintf(stderr, "second function KeyCode %d\n", keyCode);
+}
+void CollisionHandler(const CollisionEvent & e) {
+	std::cout << "collision betwee object id: "
+			  << e.getCollisionData().objectIdA
+			  << " and id: " << e.getCollisionData().objectIdB << std::endl;
+}
+void testCollisionEvent() {
+	Collision testCollision(1, 2, {3, 4}, {5, 6}, 7.8f);
+	subscribe<CollisionEvent>(CollisionHandler, 1);
+	// EventHandler<PlayerDamagedEvent>
+	triggerEvent(CollisionEvent(testCollision), 1);
+}
+int main(int argc, char * args[]) {
+	LoopManager gameLoop;
+	// Create an event handler for KeyPressedEvent
+	// EventHandler<KeyPressedEvent> callback = [](const KeyPressedEvent& e) {
+	//     onKeyPressed(e);
+	// };
+	// custom event class poc
+	subscribe<PlayerDamagedEvent>(onPlayerDamaged);
+	triggerEvent(PlayerDamagedEvent(50, 1));
+	subscribe<KeyPressedEvent>(onKeyPressed, 1, false);
+	subscribe<KeyPressedEvent>(onKeyPressed1, false);
+	// queueEvent(std::move(anotherKeyPressEvent));
+	triggerEvent(KeyPressedEvent(42), 1);
+
+	EventManager::getInstance().dispatchEvents();
+	//collision event call
+	testCollisionEvent();
+
+	gameLoop.setup();
+	gameLoop.loop();
+	return 0;
+}
+// void collisionUpdate(){
+// 	int count;
+// 	//iedere collision
+// 	for (int i = 0; i < count; i++)
+// 	{
+// 		//trigger object 1
+// 		//triger object 2
+// 		triggerEvent(CollisionEvent(1,2),1);
+// 		triggerEvent(CollisionEvent(1,2),2);
+// 	}
+
+// }
+// int main(){
+
+// 	return 0;
+// }
diff --git a/mwe/events/src/timer.cpp b/mwe/events/src/timer.cpp
new file mode 100644
index 0000000..0b89bf5
--- /dev/null
+++ b/mwe/events/src/timer.cpp
@@ -0,0 +1,53 @@
+#include "timer.h"
+
+LoopTimer::LoopTimer() {}
+LoopTimer & LoopTimer::getInstance() {
+	static LoopTimer instance;
+	return instance;
+}
+
+void LoopTimer::start() {
+	lastFrameTime = SDL_GetTicks64();
+	elapsedTime = 0;
+	elapsedFixedTime = 0;
+	deltaTime = 0;
+}
+
+// Update the timer, calculate deltaTime
+void LoopTimer::update() {
+	uint64_t currentFrameTime = SDL_GetTicks64();
+	deltaTime = (currentFrameTime - lastFrameTime) / 1000.0;
+
+	if (deltaTime > maximumDeltaTime) {
+		deltaTime = maximumDeltaTime;
+	}
+
+	elapsedTime += deltaTime;
+	lastFrameTime = currentFrameTime;
+}
+
+double LoopTimer::getDeltaTime() const { return deltaTime; }
+int LoopTimer::getCurrentTime() const { return SDL_GetTicks(); }
+
+void LoopTimer::advanceFixedUpdate() { elapsedFixedTime += fixedDeltaTime; }
+
+double LoopTimer::getFixedDeltaTime() const { return fixedDeltaTime; }
+
+void LoopTimer::setFPS(int FPS) {
+	this->FPS = FPS;
+	frameTargetTime = 1.0 / FPS;
+}
+
+int LoopTimer::getFPS() const { return FPS; }
+
+void LoopTimer::enforceFrameRate() {
+	uint64_t currentFrameTime = SDL_GetTicks64();
+	double frameDuration = (currentFrameTime - lastFrameTime) / 1000.0;
+
+	if (frameDuration < frameTargetTime) {
+		uint32_t delayTime
+			= (uint32_t) ((frameTargetTime - frameDuration) * 1000.0);
+		SDL_Delay(delayTime);
+	}
+}
+double LoopTimer::getLag() const { return elapsedTime - elapsedFixedTime; }
diff --git a/mwe/events/src/window.cpp b/mwe/events/src/window.cpp
new file mode 100644
index 0000000..41eb85f
--- /dev/null
+++ b/mwe/events/src/window.cpp
@@ -0,0 +1,29 @@
+#include "window.h"
+WindowManager::WindowManager() {}
+WindowManager::~WindowManager() { destroyWindow(); }
+SDL_Renderer * WindowManager::getRenderer() { return renderer; }
+
+bool WindowManager::initWindow() {
+	if (SDL_Init(SDL_INIT_EVERYTHING) != 0) {
+		fprintf(stderr, "Error inititalising SDL.\n");
+		return false;
+	}
+	window = SDL_CreateWindow("SDL Tutorial", SDL_WINDOWPOS_UNDEFINED,
+							  SDL_WINDOWPOS_UNDEFINED, SCREEN_WIDTH,
+							  SCREEN_HEIGHT, SDL_WINDOW_SHOWN);
+	if (!window) {
+		fprintf(stderr, "Error creating SDL Window. \n");
+		return false;
+	}
+	renderer = SDL_CreateRenderer(window, -1, 0);
+	if (!renderer) {
+		fprintf(stderr, "Error creating SDL renderer. \n");
+		return false;
+	}
+	return true;
+}
+void WindowManager::destroyWindow() {
+	SDL_DestroyRenderer(renderer);
+	SDL_DestroyWindow(window);
+	SDL_Quit();
+}