Initial commit

src/loader/component_loader.hpp

@@ -0,0 +1,61 @@
+#pragma once
+#include "component_interface.hpp"
+
+class component_loader final
+{
+public:
+	class premature_shutdown_trigger final : public std::exception
+	{
+		[[nodiscard]] const char* what() const noexcept override
+		{
+			return "Premature shutdown requested";
+		}
+	};
+
+	template <typename T>
+	class installer final
+	{
+		static_assert(std::is_base_of<component_interface, T>::value, "component has invalid base class");
+
+	public:
+		installer()
+		{
+			register_component(std::make_unique<T>());
+		}
+	};
+
+	template <typename T>
+	static T* get()
+	{
+		for (const auto& component_ : get_components())
+		{
+			if (typeid(*component_.get()) == typeid(T))
+			{
+				return reinterpret_cast<T*>(component_.get());
+			}
+		}
+
+		return nullptr;
+	}
+
+	static void register_component(std::unique_ptr<component_interface>&& component);
+
+	static bool post_start();
+	static bool post_load();
+	static void post_unpack();
+	static void pre_destroy();
+	static void clean();
+
+	static void* load_import(const std::string& library, const std::string& function);
+
+	static void trigger_premature_shutdown();
+
+private:
+	static std::vector<std::unique_ptr<component_interface>>& get_components();
+};
+
+#define REGISTER_COMPONENT(name)                       \
+namespace                                           \
+{                                                   \
+	static component_loader::installer<name> __component; \
+}