Re-remade component and system ids

Former-commit-id: 98b76695cca904c55c7333801c3cdf693da15086

SDK/include/NDK/BaseComponent.inl

@@ -2,15 +2,46 @@
 // This file is part of the "Nazara Development Kit"
 // For conditions of distribution and use, see copyright notice in Prerequesites.hpp
 
+#include <Ndk/Algorithm.hpp>
+#include <type_traits>
+
 namespace Ndk
 {
-	inline BaseComponent::BaseComponent(ComponentId componentId) :
-	m_componentId(componentId)
+	inline BaseComponent::BaseComponent(ComponentIndex index) :
+	m_componentIndex(index)
 	{
 	}
 
-	inline ComponentId BaseComponent::GetId() const
+	inline ComponentIndex BaseComponent::GetIndex() const
 	{
-		return m_componentId;
+		return m_componentIndex;
+	}
+
+	template<typename ComponentType, unsigned int N>
+	ComponentIndex BaseComponent::Register(const char (&name)[N])
+	{
+		static_assert(std::is_default_constructible<ComponentType>::value, "ComponentType should be default-constructible");
+
+		ComponentId id = BuildComponentId(name);
+		auto factory = []() -> BaseComponent*
+		{
+			return new ComponentType;
+		};
+
+		return Register(id, factory);
+	}
+
+	inline ComponentIndex BaseComponent::Register(ComponentId id, Factory factoryFunc)
+	{
+		ComponentIndex index = s_entries.size();
+
+		s_entries.resize(index + 1);
+		ComponentEntry& entry = s_entries.back();
+		entry.factory = factoryFunc;
+		entry.id = id;
+
+		s_idToIndex[id] = index;
+
+		return index;
 	}
 }