Add Settings class

CMakeLists.txt

@@ -21,7 +21,7 @@ if(DEBUG)
 	# -Wall   = All warnings about contructions that are easily avoidable
 	# -Wextra = Extra warning flags not covered by -Wall
 	# -pg     = Generate profile information for analysis with gprof
-	set(CMAKE_CXX_FLAGS_DEBUG "${CMAKE_CXX_FLAGS_DEBUG} -Og -Wall -Wextra -pg")
+	set(CMAKE_CXX_FLAGS_DEBUG "${CMAKE_CXX_FLAGS_DEBUG} -Og -Wall -Wextra -g -pg")
 	# gprof <GAME> gmon.out > profile-data.txt
 else()
 	# cmake -DDEBUG=off .. && make
@@ -37,6 +37,7 @@ include_directories(
 	"${ENGINE}/vendor/glad/include"
 	"${ENGINE}/vendor/glfw/include"
 	"${ENGINE}/vendor/glm"
+	"${ENGINE}/vendor/json/include"
 	"${ENGINE}/src"
 )
 

assets/settings.json

@@ -0,0 +1,7 @@
+{
+	"window": {
+		"height": 720,
+		"title": "Inferno",
+		"width": 1280
+	}
+}

inferno/src/inferno/application.cpp

@@ -8,6 +8,7 @@
 #include "inferno/event/applicationevent.h"
 #include "inferno/event/event.h"
 #include "inferno/log.h"
+#include "inferno/settings.h"
 #include "inferno/window.h"
 
 namespace Inferno {
@@ -26,7 +27,10 @@ namespace Inferno {
 
 	void Application::run()
 	{
-		NF_CORE_LOG("Application startup!");
+		NF_CORE_LOG("Application startup");
+
+		// Initialize Settings
+		new Settings();
 
 		m_window = std::make_unique<Window>();
 		m_window->setEventCallback(NF_BIND_EVENT(Application::onEvent));
@@ -43,7 +47,7 @@ namespace Inferno {
 			m_window->update();
 		}
 
-		NF_CORE_LOG("Application shutdown!");
+		NF_CORE_LOG("Application shutdown");
 	}
 
 	void Application::onEvent(Event &e)

inferno/src/inferno/application.h

@@ -10,8 +10,7 @@ namespace Inferno {
 	class WindowResizeEvent;
 	class Window;
 
-	class Application
-	{
+	class Application {
 	public:
 		Application();
 		virtual ~Application();

inferno/src/inferno/settings.cpp

@@ -0,0 +1,83 @@
+#include <fstream> // std::ifstream, std::ofstream
+#include <iomanip> // std::setfill, std::setw
+#include <string> // std::string
+
+#include "inferno/core.h"
+#include "inferno/log.h"
+#include "inferno/settings.h"
+
+namespace Inferno {
+
+	Settings* Settings::s_instance = nullptr;
+
+	Settings::Settings(const char* path) :
+		m_path(path)
+	{
+		NF_CORE_ASSERT(!s_instance, "Settings already exists!");
+		s_instance = this;
+
+		this->initialize();
+	}
+
+	Settings::~Settings()
+	{
+		this->destroy();
+	}
+
+	void Settings::initialize()
+	{
+		nlohmann::json m_json = load();
+
+		try {
+			m_properties.title = m_json["window"]["title"].get<std::string>().c_str();
+			m_properties.width = m_json["window"]["width"].get<int>();
+			m_properties.height = m_json["window"]["height"].get<int>();
+		}
+		catch (...) {
+			NF_CORE_WARN("Settings syntax error: using default values");
+		}
+	}
+
+	void Settings::destroy()
+	{
+	}
+
+	nlohmann::json Settings::load() const
+	{
+		nlohmann::json json;
+
+		std::ifstream file(m_path);
+		NF_CORE_ASSERT(file.is_open(), "Could not open settings file!");
+
+		if (file.is_open()) {
+			// Read the JSON file
+			file >> json;
+			file.close();
+		}
+
+		NF_CORE_INFO("Settings loaded");
+
+		return json;
+	}
+
+	bool Settings::save()
+	{
+		nlohmann::json json;
+		json["window"]["title"] = m_properties.title;
+		json["window"]["width"] = m_properties.width;
+		json["window"]["height"] = m_properties.height;
+
+		std::ofstream file (m_path);
+		NF_CORE_ASSERT(file.is_open(), "Could not open settings file!");
+
+		if (file.is_open()) {
+			// Write the JSON file with single tabs, nicely formatted
+			file << std::setfill ('\t') << std::setw(1) << json << std::endl;
+			file.close();
+		}
+
+		NF_CORE_INFO("Settings saved");
+
+		return true;
+	}
+}

inferno/src/inferno/settings.h

@@ -0,0 +1,40 @@
+#ifndef SETTINGS_H
+#define SETTINGS_H
+
+#include <nlohmann/json.hpp>
+
+namespace Inferno {
+
+	struct SettingsProperties {
+		const char* title = "Inferno default";
+		int width = 1280;
+		int height = 720;
+	};
+
+	class Settings {
+	public:
+		Settings(const char* path = "assets/settings.json");
+		virtual ~Settings();
+
+		void initialize();
+		void destroy();
+
+		nlohmann::json load() const;
+		bool save();
+
+// -----------------------------------------
+
+		static inline Settings &get() { return *s_instance; }
+
+		inline SettingsProperties &properties() { return m_properties; }
+
+	private:
+		const char* m_path;
+		SettingsProperties m_properties;
+
+		static Settings* s_instance;
+	};
+
+}
+
+#endif // SETTINGS_H