Adding a scene manger and wal functions

lib/wal/sources/Wal.hpp

@@ -0,0 +1,91 @@
+//
+// Created by Zoe Roux on 2021-05-14.
+//
+
+
+#pragma once
+
+#include <vector>
+#include <memory>
+#include <typeinfo>
+#include <Exception/WalError.hpp>
+#include "Events/EventManager.hpp"
+#include "Renderer/Renderer.hpp"
+#include "Scene/SceneManager.hpp"
+#include "Entity/Entity.hpp"
+#include "System/System.hpp"
+
+namespace WAL
+{
+	//! @brief The main WAL class, it is used to setup and run the ECS.
+	class WAL
+	{
+	private:
+		//! @brief The scene manager that allow multiple scene to work together.
+		SceneManager _scenes;
+		//! @brief The event manager
+		EventManager _eventManager;
+		//! @brief The list of registered systems
+		std::vector<std::unique_ptr<System>> _systems = {};
+		//! @brief The renderer used to draw entities
+		std::unique_ptr<Renderer> _renderer;
+	public:
+		//! @brief Create a new system in place.
+		//! @return The wal instance used to call this function is returned. This allow method chaining.
+		template<typename T, class ...Types>
+		WAL &addSystem(Types ...params)
+		{
+			const std::type_info &type = typeid(T);
+			auto &existing =std::find(this->_systems.begin(), this->_systems.end(), [&type] (auto &sys) {
+				return typeid(sys) == type;
+			});
+			if (existing != this->_systems.end())
+				throw SystemExistError("A system of the type \"" + std::string(type.name()) + "\" already exists.");
+			this->_systems.push_back(std::make_unique(params...));
+			return *this;
+		}
+
+		//! @brief Add a system by copy.
+		//! @return The wal instance used to call this function is returned. This allow method chaining.
+		template<typename T>
+		WAL &addSystem(const T &system)
+		{
+			const std::type_info &type = typeid(T);
+			auto &existing =std::find(this->_systems.begin(), this->_systems.end(), [&type] (auto &sys) {
+				return typeid(sys) == type;
+			});
+			if (existing != this->_systems.end())
+				throw SystemExistError("A system of the type \"" + std::string(type.name()) + "\" already exists.");
+			this->_systems.push_back(std::make_unique(system));
+			return *this;
+		}
+
+		//! @brief Remove a system using it's type.
+		template<typename T>
+		WAL &removeSystem()
+		{
+			const std::type_info &type = typeid(T);
+			auto &existing =std::find(this->_systems.begin(), this->_systems.end(), [&type] (auto &sys) {
+				return typeid(sys) == type;
+			});
+			if (existing == this->_systems.end())
+				throw NotFoundError("No system could be found with the type \"" + std::string(type.name()) + "\".");
+			return *this;
+		}
+
+		//! @brief Get the scene manager.
+		SceneManager &getSceneManger();
+
+		//! @brief Start the game loop
+		void run();
+
+		//! @brief A default constructor
+		WAL() = default;
+		//! @brief A WAL can't be copy constructed
+		WAL(const WAL &) = delete;
+		//! @brief A default destructor
+		~WAL() = default;
+		//! @brief A default assignment operator
+		WAL &operator=(const WAL &) = default;
+	};
+}