1 files changed, 44 insertions, 0 deletions
diff --git a/src/crepe/manager/SystemManager.hpp b/src/crepe/manager/SystemManager.hpp
new file mode 100644
index 0000000..addd274
--- /dev/null
+++ b/src/crepe/manager/SystemManager.hpp
@@ -0,0 +1,44 @@
+#pragma once
+
+#include <cassert>
+#include <format>
+#include <memory>
+
+#include "SystemManager.h"
+
+namespace crepe {
+
+template <class T>
+T & SystemManager::get_system() {
+	using namespace std;
+	static_assert(
+		is_base_of<System, T>::value, "get_system must recieve a derivative class of System"
+	);
+
+	const type_info & type = typeid(T);
+	if (!this->systems.contains(type))
+		throw runtime_error(format("SystemManager: {} is not initialized", type.name()));
+
+	System * system = this->systems.at(type).get();
+	T * concrete_system = dynamic_cast<T *>(system);
+	assert(concrete_system != nullptr);
+
+	return *concrete_system;
+}
+
+template <class T>
+void SystemManager::load_system() {
+	using namespace std;
+	static_assert(
+		is_base_of<System, T>::value, "load_system must recieve a derivative class of System"
+	);
+
+	const type_info & type = typeid(T);
+	if (this->systems.contains(type))
+		throw runtime_error(format("SystemManager: {} is already initialized", type.name()));
+	System * system = new T(this->mediator);
+	this->systems[type] = unique_ptr<System>(system);
+	this->system_order.push_back(*this->systems[type]);
+}
+
+} // namespace crepe