Multiplayer Connection Start

CMakeLists.txt

@@ -319,11 +319,16 @@ add_library(GameLib STATIC
 target_include_directories(GameLib PUBLIC game/src)
 target_link_libraries(GameLib PUBLIC Engine)
 
+add_subdirectory(server)
+
 # --- Executable ---
 add_executable(ColorRace
         game/src/main.cpp
         game/src/mainMenu/layer/MainMenuUiLayer.cpp
         game/src/mainMenu/layer/MainMenuUiLayer.h
+        game/src/multiplayer/LudoGameClient.cpp
+        game/src/multiplayer/LudoGameClient.h
+        game/src/multiplayer/LudoNetworkEvents.h
 )
 
 target_link_libraries(ColorRace PRIVATE

engine/src/core/events/EventBus.h

@@ -5,6 +5,7 @@
 #ifndef COLORRACE_EVENTBUS_H
 #define COLORRACE_EVENTBUS_H
 #include <functional>
+#include <mutex>
 
 namespace engine {
     class IEventBus {
@@ -18,15 +19,22 @@ namespace engine {
         using Handler = std::function<void(Event&)>;
 
         void subscribe(Handler handler) {
+            std::lock_guard<std::mutex> lock(m_mutex);
             m_handlers.push_back(handler);
         }
 
         void publish(Event& event) const {
-            for (const auto& handler : m_handlers) {
+            std::vector<Handler> handlersCopy;
+            {
+                std::lock_guard<std::mutex> lock(m_mutex);
+                handlersCopy = m_handlers;
+            }
+            for (const auto& handler : handlersCopy) {
                 handler(event);
             }
         }
     private:
+        mutable std::mutex m_mutex;
         std::vector<Handler> m_handlers;
     };
 } // engine

external/NetworkCore

@@ -1 +1 @@
-Subproject commit f67ce801f799aacb9d10b35423417953e954548b
+Subproject commit 944f2f63e06e1d368f85c11916046312b1d0067f

game/src/ColorRaceApp.cpp

@@ -13,6 +13,7 @@
 
 void ColorRaceApp::onUpdate(float deltaTime) {
     getSceneManager().update(deltaTime);
+
 }
 
 void ColorRaceApp::onRender() {

game/src/ColorRaceApp.h

@@ -6,12 +6,15 @@
 #define COLORRACE_COLORRACEAPP_H
 #include "gameLayer/GameLayer.h"
 #include "GameScene.h"
+#include "../../external/NetworkCore/src/client/GameClient.h"
 #include "core/Application.h"
 #include "ecs/EntityRegistry.h"
 #include "ecs/standardComponents/MeshComponent.h"
 #include "ecs/standardComponents/TransformComponent.h"
 #include "layer/SceneManager.h"
 #include "mainMenu/MainMenuScene.h"
+#include "multiplayer/LudoGameClient.h"
+#include "multiplayer/LudoNetworkEvents.h"
 #include "renderer/MeshRenderer.h"
 #include "renderer/entities/Camera.h"
 #include "renderer/shader/StaticShader.h"
@@ -33,12 +36,28 @@ public:
         config.debugContext = true;
         return config;
     }
-    ColorRaceApp() : Application(makeConfig()) {
-        getSceneManager().switchTo(std::make_unique<MainMenuScene>(m_applicationEventBus, getInputContextStack(), getKeyboard(), getMouse()));
+    ColorRaceApp() : Application(makeConfig()), m_networkEventBus(std::make_shared<engine::EventBus<NetworkEvents>>()) {
+        getSceneManager().switchTo(std::make_unique<MainMenuScene>(m_applicationEventBus, m_networkEventBus, getInputContextStack(), getKeyboard(), getMouse()));
+        m_networkEventBus->subscribe([this](NetworkEvents& event) {
+                std::visit([this](auto&& e) {
+                    using T = std::decay_t<decltype(e)>;
+                    if constexpr (std::is_same_v<T, ConnectRequest>) {
+                        engine::net::ClientConfig client_config;
+                        client_config.host = e.host;
+                        client_config.port = e.port;
+                        m_ludoGameClient = std::make_unique<LudoGameClient>(client_config, m_networkEventBus);
+                        m_ludoGameClient->onStart();
+                    }
+                }, event);
+            });
     }
 protected:
     void onUpdate(float deltaTime) override;
     void onRender() override;
+    std::shared_ptr<engine::EventBus<NetworkEvents>> m_networkEventBus;
+
+private:
+    std::unique_ptr<LudoGameClient> m_ludoGameClient;
 };
 
 

game/src/mainMenu/MainMenuScene.cpp

@@ -8,7 +8,7 @@
 
 void MainMenuScene::onEnter() {
     Scene::onEnter();
-    addLayer(std::make_unique<MainMenuUiLayer>(m_keyboard, m_mouse, getAnimationEventBus(), m_applicationEventBus, *assetManager));
+    addLayer(std::make_unique<MainMenuUiLayer>(m_keyboard, m_mouse, getAnimationEventBus(), m_applicationEventBus, m_networkEventBus, *assetManager));
 }
 
 std::vector<engine::AssetRequest> MainMenuScene::getRequiredAssets() const {

game/src/mainMenu/MainMenuScene.h

@@ -7,13 +7,16 @@
 #include <utility>
 
 #include "layer/Scene.h"
+#include "multiplayer/LudoNetworkEvents.h"
 
 
 class MainMenuScene : public engine::Scene {
 public:
-    MainMenuScene(std::shared_ptr<engine::EventBus<ApplicationEvents>> applicationEventbus, engine::InputContextStack& inputContext, engine::Keyboard& keyboard, engine::Mouse& mouse) : Scene(std::move(applicationEventbus), inputContext, keyboard, mouse) {}
+    MainMenuScene(std::shared_ptr<engine::EventBus<ApplicationEvents>> applicationEventbus, std::shared_ptr<engine::EventBus<NetworkEvents>> networkEventbus, engine::InputContextStack& inputContext, engine::Keyboard& keyboard, engine::Mouse& mouse) : Scene(std::move(applicationEventbus), inputContext, keyboard, mouse), m_networkEventBus(std::move(networkEventbus)) {}
     void onEnter() override;
     std::vector<engine::AssetRequest> getRequiredAssets() const override;
+private:
+    std::shared_ptr<engine::EventBus<NetworkEvents>> m_networkEventBus;
 };
 
 

game/src/mainMenu/layer/MainMenuUiLayer.cpp

@@ -62,6 +62,23 @@ void MainMenuUiLayer::onAttachImpl() {
     auto backgroundTexture = m_assetManager.getTexture("main_menu_background");
 
     backgroundImage = std::make_unique<engine::GUITexture>(backgroundTexture, glm::vec2(0,0), glm::vec2(1,1));
+
+    m_networkEventBus->subscribe([this](NetworkEvents& event) {
+        std::visit([this](auto&& e) {
+            using T = std::decay_t<decltype(e)>;
+            if constexpr (std::is_same_v<T, ConnectResult>) {
+                if (e.success) {
+                    spdlog::info("Received positive Connection Result");
+                    m_connectionError = false;
+                    m_closeConnectPopup = true;
+                } else {
+                    spdlog::info("Received negative Connection Result");
+                    m_connectionError = true;
+                    m_errorMessage = e.errorMessage;
+                }
+            }
+        }, event);
+    });
 }
 
 void MainMenuUiLayer::onDetachImpl() {
@@ -74,6 +91,9 @@ void MainMenuUiLayer::renderConnectDialog() {
     ImGui::SetNextWindowPos(center, ImGuiCond_Appearing, ImVec2(0.5f, 0.5f));
 
     if (ImGui::BeginPopupModal("ConnectToServer", nullptr, ImGuiWindowFlags_AlwaysAutoResize)) {
+        if (m_closeConnectPopup) {
+            ImGui::CloseCurrentPopup();
+        }
         ImGui::InputText("Host", m_hostBuffer, sizeof(m_hostBuffer));
         ImGui::InputInt("Port", &m_port);
 
@@ -87,6 +107,8 @@ void MainMenuUiLayer::renderConnectDialog() {
             // ApplicationEvents::ConnectRequested e{ m_hostBuffer, static_cast<uint16_t>(m_port) };
             // m_appEvents.publish(e);
             // Popup offen lassen bis Ergebnis feststeht, siehe unten
+            NetworkEvents connectRequest = ConnectRequest(m_hostBuffer, static_cast<uint16_t>(m_port));
+            m_networkEventBus->publish(connectRequest);
         }
 
         ImGui::SameLine();

game/src/mainMenu/layer/MainMenuUiLayer.h

@@ -8,14 +8,20 @@
 
 #include "layer/Layer.h"
 #include "loader/assets/AssetManager.h"
+#include "multiplayer/LudoNetworkEvents.h"
 #include "renderer/GuiRenderer.h"
 #include "renderer/ui/GUITexture.h"
 
 
 class MainMenuUiLayer : public engine::Layer {
 public:
-    MainMenuUiLayer(engine::Keyboard &keyboard, engine::Mouse &mouse, engine::EventBus<engine::animation::AnimationMarkerEvent> &animationEventBus, std::shared_ptr<engine::EventBus<ApplicationEvents>> applicationEventbus, engine::AssetManager& assetManager)
-    : Layer(keyboard, mouse, animationEventBus, std::move(applicationEventbus)), m_assetManager(assetManager) {
+    MainMenuUiLayer(engine::Keyboard &keyboard,
+        engine::Mouse &mouse,
+        engine::EventBus<engine::animation::AnimationMarkerEvent> &animationEventBus,
+        std::shared_ptr<engine::EventBus<ApplicationEvents>> applicationEventbus,
+        std::shared_ptr<engine::EventBus<NetworkEvents>> networkEventbus,
+        engine::AssetManager& assetManager)
+    : Layer(keyboard, mouse, animationEventBus, std::move(applicationEventbus)), m_assetManager(assetManager), m_networkEventBus(std::move(networkEventbus)) {
     }
 
     void onRender() override;
@@ -26,6 +32,7 @@ protected:
     void onDetachImpl() override;
 
 private:
+    std::shared_ptr<engine::EventBus<NetworkEvents>> m_networkEventBus;
     engine::AssetManager& m_assetManager;
     std::unique_ptr<engine::GUITexture> backgroundImage;
     engine::renderer::GuiRenderer m_guiRenderer;
@@ -33,6 +40,7 @@ private:
     char m_hostBuffer[64] = "127.0.0.1";
     int m_port = 7777;
     bool m_connectionError = false;
+    bool m_closeConnectPopup = false;
     std::string m_errorMessage;
 
     void renderConnectDialog();

game/src/multiplayer/LudoGameClient.cpp

@@ -0,0 +1,5 @@
+//
+// Created by sebastian on 06.08.26.
+//
+
+#include "LudoGameClient.h"

game/src/multiplayer/LudoGameClient.h

@@ -0,0 +1,47 @@
+//
+// Created by sebastian on 06.08.26.
+//
+
+#ifndef COLORRACE_LUDOGAMECLIENT_H
+#define COLORRACE_LUDOGAMECLIENT_H
+#include <iostream>
+
+#include "LudoNetworkEvents.h"
+#include "../../../external/NetworkCore/src/client/ApplicationClient.h"
+#include "core/events/EventBus.h"
+#include "spdlog/spdlog.h"
+
+
+class LudoGameClient : public engine::net::ApplicationClient{
+public:
+    explicit LudoGameClient(const engine::net::ClientConfig &config, std::shared_ptr<engine::EventBus<NetworkEvents>> networkEventBus)
+        : ApplicationClient(config), m_networkEventBus(std::move(networkEventBus)) {
+    }
+
+protected:
+    void onConnected() override {
+        spdlog::info("LudoGameClient successfully connected to server");
+        send({
+     {"type", "auth"},
+     {"payload", {
+         {"token", getConfig().token}
+     }}
+    });
+        NetworkEvents connectResult = ConnectResult(true, "");
+        m_networkEventBus->publish(connectResult);
+    }
+
+    void onDisconnected() override {
+        std::cout << "Verbindung verloren, versuche Reconnect...\n";
+    }
+
+    void onMessage(nlohmann::json message) override {
+        std::cout << "Empfangen: " << message.dump() << "\n";
+    }
+
+private:
+    std::shared_ptr<engine::EventBus<NetworkEvents>> m_networkEventBus;
+};
+
+
+#endif //COLORRACE_LUDOGAMECLIENT_H

game/src/multiplayer/LudoNetworkEvents.h

@@ -0,0 +1,24 @@
+//
+// Created by sebastian on 06.08.26.
+//
+
+#ifndef COLORRACE_LUDONETWORKEVENTS_H
+#define COLORRACE_LUDONETWORKEVENTS_H
+#include <cstdint>
+#include <string>
+#include <variant>
+#include <nlohmann/json_fwd.hpp>
+
+
+struct ConnectRequest {
+    std::string host;
+    uint16_t port;
+};
+
+struct ConnectResult {
+    bool success;
+    std::string errorMessage;
+};
+
+using NetworkEvents = std::variant<ConnectRequest, ConnectResult>;
+#endif //COLORRACE_LUDONETWORKEVENTS_H

server/CMakeLists.txt

@@ -0,0 +1,17 @@
+
+
+add_executable(ColorRaceServer
+    src/main.cpp
+        src/LudoGameServer.cpp
+        src/LudoGameServer.h
+)
+
+target_include_directories(ColorRaceServer PRIVATE
+        src
+)
+
+target_link_libraries(ColorRaceServer PRIVATE
+        NetworkCore
+)
+
+target_compile_features(ColorRaceServer PRIVATE cxx_std_20) # an deinen tatsächlichen Standard anpassen

server/src/LudoGameServer.cpp

@@ -0,0 +1,26 @@
+//
+// Created by sebastian on 06.08.26.
+//
+
+#include "LudoGameServer.h"
+
+#include "spdlog/spdlog.h"
+
+void LudoGameServer::onStart() {
+    ApplicationServer::onStart();
+    m_gameServer.onClientConnected([](engine::net::ClientId clientId) {
+        spdlog::info("Client connected: {}", clientId);
+    });
+
+    m_gameServer.onMessageReceived([this](engine::net::ClientId clientId, const nlohmann::json& msg) {
+       spdlog::info("Client {}: {}", clientId, msg.dump());
+       if (msg.value("type", "") == "Ping") {
+           m_gameServer.sendTo(clientId, { {"type", "Pong"}, {"payload", nlohmann::json::object()} });
+       }
+   });
+}
+
+void LudoGameServer::onTick(float deltaTime) {
+    ApplicationServer::onTick(deltaTime);
+    m_gameServer.update();
+}

server/src/LudoGameServer.h

@@ -0,0 +1,22 @@
+//
+// Created by sebastian on 06.08.26.
+//
+
+#ifndef COLORRACE_LUDOGAMESERVER_H
+#define COLORRACE_LUDOGAMESERVER_H
+#include "../../external/NetworkCore/src/server/ApplicationServer.h"
+#include "../../external/NetworkCore/src/server/GameServer.h"
+
+
+class LudoGameServer : public engine::net::ApplicationServer {
+public:
+    explicit LudoGameServer(const uint16_t port, engine::net::ServerConfig& serverConfig) : m_gameServer(port, serverConfig) {};
+protected:
+    void onStart() override;
+    void onTick(float deltaTime) override;
+private:
+    engine::net::GameServer m_gameServer;
+};
+
+
+#endif //COLORRACE_LUDOGAMESERVER_H

server/src/main.cpp

@@ -0,0 +1,13 @@
+#include <iostream>
+#include <ostream>
+
+#include "LudoGameServer.h"
+//
+// Created by sebastian on 06.08.26.
+//
+int main() {
+    engine::net::ServerConfig config = engine::net::ServerConfig();
+    LudoGameServer server = LudoGameServer(4242, config);
+    server.run();
+    return 0;
+}