Core: Rework VirtualDirectory to allow custom directory resolving

include/Nazara/Core/VirtualDirectoryFilesystemResolver.hpp

@@ -0,0 +1,40 @@
+// Copyright (C) 2023 Jérôme "Lynix" Leclercq (lynix680@gmail.com)
+// This file is part of the "Nazara Engine - Core module"
+// For conditions of distribution and use, see copyright notice in Config.hpp
+
+#pragma once
+
+#ifndef NAZARA_CORE_VIRTUALDIRECTORYFILESYSTEMRESOLVER_HPP
+#define NAZARA_CORE_VIRTUALDIRECTORYFILESYSTEMRESOLVER_HPP
+
+#include <Nazara/Prerequisites.hpp>
+#include <Nazara/Core/Config.hpp>
+#include <Nazara/Core/VirtualDirectory.hpp>
+#include <filesystem>
+
+namespace Nz
+{
+	class NAZARA_CORE_API VirtualDirectoryFilesystemResolver : public VirtualDirectoryResolver
+	{
+		public:
+			inline VirtualDirectoryFilesystemResolver(std::filesystem::path physicalPath, OpenModeFlags fileOpenMode = OpenMode::ReadOnly | OpenMode::Defer);
+			VirtualDirectoryFilesystemResolver(const VirtualDirectoryFilesystemResolver&) = delete;
+			VirtualDirectoryFilesystemResolver(VirtualDirectoryFilesystemResolver&&) = delete;
+			~VirtualDirectoryFilesystemResolver() = default;
+
+			void ForEach(std::weak_ptr<VirtualDirectory> parent, FunctionRef<bool(std::string_view name, VirtualDirectory::Entry&& entry)> callback) const override;
+
+			std::optional<VirtualDirectory::Entry> Resolve(std::weak_ptr<VirtualDirectory> parent, const std::string_view* parts, std::size_t partCount) const override;
+
+			VirtualDirectoryFilesystemResolver& operator=(const VirtualDirectoryFilesystemResolver&) = delete;
+			VirtualDirectoryFilesystemResolver& operator=(VirtualDirectoryFilesystemResolver&&) = delete;
+
+		private:
+			std::filesystem::path m_physicalPath;
+			OpenModeFlags m_fileOpenMode;
+	};
+}
+
+#include <Nazara/Core/VirtualDirectoryFilesystemResolver.inl>
+
+#endif // NAZARA_CORE_VIRTUALDIRECTORYFILESYSTEMRESOLVER_HPP