*

LEngine/AssetMetadata.cpp

@@ -0,0 +1,75 @@
+#include "AssetMetadata.h"
+#include <fstream>
+#include <combaseapi.h>
+#include <iostream>
+#include <string>
+#include <sstream>
+#include "AssetDatabase.h"
+#include <Windows.h>
+#include <wrl.h>
+using namespace Microsoft::WRL;
+
+AssetMetadata::AssetMetadata(const std::wstring& asset_path) : _asset_path(asset_path) {
+	_meta_path = AssetDatabase::asset_to_meta_path(_asset_path);
+
+	if (std::tr2::sys::exists(std::tr2::sys::path(_meta_path))) {
+		Load();
+	} else {
+		create();
+		Save();
+	}
+}
+
+void AssetMetadata::create() {
+	CoCreateGuid((GUID*)&_guid);
+	_modification_time = std::tr2::sys::last_write_time(std::tr2::sys::path(_asset_path)).time_since_epoch().count();
+	_importer = AssetDatabase::get().find_importer(_asset_path);
+}
+
+void AssetMetadata::Load() {
+	std::wifstream file(_meta_path);
+
+	std::wstring v;
+	std::getline(file, v);
+
+	std::wstring guid_str;
+	std::getline(file, guid_str);
+	_guid = str_to_guid(guid_str);
+
+	std::wstring time_str;
+	std::getline(file, time_str);
+	_modification_time = std::stoull(time_str);
+
+	file.close();
+}
+
+void AssetMetadata::Save() {
+	std::wofstream file;
+	file.open(_meta_path, std::ios::trunc);
+	file << version << std::endl;
+	file << guid_to_str(_guid) << std::endl;
+	file << _modification_time << std::endl;
+	//file << _importer->name();
+	file.close();
+}
+
+Guid AssetMetadata::str_to_guid(const std::wstring& guid) {
+	Guid iid;
+	IIDFromString(guid.c_str(), (GUID*)&iid);
+	return iid;
+}
+
+std::wstring AssetMetadata::guid_to_str(const Guid& guid) {
+	LPOLESTR guid_str = nullptr;
+	StringFromIID(*((const GUID*)&guid), &guid_str);
+
+	//Microsoft::WRL::Wrappers::HStringReference
+
+	std::wstring result(guid_str);
+	CoTaskMemFree(guid_str);
+	return result;
+}
+
+const Guid& AssetMetadata::get_guid() const {
+	return _guid;
+}