Marginally improve OneSix offline mode launch

While reconstructing assets, skip files that don't exist.
Report missing OneSix native libraries.

logic/OneSixInstance.cpp

@@ -93,9 +93,7 @@ QDir OneSixInstance::reconstructAssets(std::shared_ptr<OneSixVersion> version)
 	AssetsIndex index;
 	bool loadAssetsIndex = AssetsUtils::loadAssetsIndexJson(indexPath, &index);
 
-	if (loadAssetsIndex)
-	{
-		if (index.isVirtual)
+	if (loadAssetsIndex && index.isVirtual)
 	{
 		QLOG_INFO() << "Reconstructing virtual assets folder at" << virtualRoot.path();
 
@@ -110,6 +108,8 @@ QDir OneSixInstance::reconstructAssets(std::shared_ptr<OneSixVersion> version)
 			QString original_path =
 				PathCombine(PathCombine(objectDir.path(), tlk), asset_object.hash);
 			QFile original(original_path);
+			if(!original.exists())
+				continue;
 			if (!target.exists())
 			{
 				QFileInfo info(target_path);
@@ -126,7 +126,6 @@ QDir OneSixInstance::reconstructAssets(std::shared_ptr<OneSixVersion> version)
 
 		// TODO: Write last used time to virtualRoot/.lastused
 	}
-	}
 
 	return virtualRoot;
 }

logic/OneSixLibrary.cpp

@@ -136,6 +136,34 @@ QString OneSixLibrary::hint()
 	return m_hint;
 }
 
+bool OneSixLibrary::filesExist()
+{
+	QString storage = storagePath();
+	if (storage.contains("${arch}"))
+	{
+		QString cooked_storage = storage;
+		cooked_storage.replace("${arch}", "32");
+		if (!QFileInfo::exists(PathCombine("libraries", cooked_storage)))
+		{
+			return false;
+		}
+		cooked_storage = storage;
+		cooked_storage.replace("${arch}", "64");
+		if (!QFileInfo::exists(PathCombine("libraries", cooked_storage)))
+		{
+			return false;
+		}
+	}
+	else
+	{
+		if (!QFileInfo::exists(PathCombine("libraries", storage)))
+		{
+			return false;
+		}
+	}
+	return true;
+}
+
 bool OneSixLibrary::extractTo(QString target_dir)
 {
 	QString storage = storagePath();

logic/OneSixLibrary.h

@@ -128,4 +128,5 @@ public:
 	QString hint();
 
 	bool extractTo(QString target_dir);
+	bool filesExist();
 };

logic/OneSixUpdate.cpp

@@ -348,18 +348,26 @@ void OneSixUpdate::prepareForLaunch()
 				   "it or changing the version.");
 		return;
 	}
-/*
+	/*
 	 * 		emitFailed("Could not create the native library folder:\n" + natives_dir_raw +
-				   "\nMake sure MultiMC has appropriate permissions and there is enough space "
+					   "\nMake sure MultiMC has appropriate permissions and there is enough
+	 space "
 					   "on the storage device.");
-*/
+	*/
 	for (auto lib : version->getActiveNativeLibs())
 	{
+		if (!lib->filesExist())
+		{
+			emitFailed("Native library is missing some files:\n" + lib->storagePath() +
+					   "\n\nRun the instance at least once in online mode to get all the "
+					   "required files.");
+			return;
+		}
 		if (!lib->extractTo(natives_dir_raw))
 		{
 			emitFailed("Could not extract the native library:\n" + lib->storagePath() + " to " +
 					   natives_dir_raw +
-					   "\nMake sure MultiMC has appropriate permissions and there is enough "
+					   "\n\nMake sure MultiMC has appropriate permissions and there is enough "
 					   "space on the storage device.");
 			return;
 		}

logic/auth/MojangAccount.cpp

@@ -198,7 +198,11 @@ void MojangAccount::authFailed(QString reason)
 {
 	// This is emitted when the yggdrasil tasks time out or are cancelled.
 	// -> we treat the error as no-op
-	if (reason != "Yggdrasil task cancelled.")
+	if (reason == "Yggdrasil task cancelled.")
+	{
+		// do nothing
+	}
+	else
 	{
 		m_online = false;
 		m_accessToken = QString();

logic/lists/ForgeVersionList.cpp

@@ -187,7 +187,7 @@ bool ForgeListLoadTask::parseForgeList(QList<BaseVersionPtr> &out)
 	QByteArray data;
 	{
 		auto dlJob = listDownload;
-		auto filename = std::dynamic_pointer_cast<CacheDownload>(dlJob)->m_target_path;
+		auto filename = std::dynamic_pointer_cast<CacheDownload>(dlJob)->getTargetFilepath();
 		QFile listFile(filename);
 		if (!listFile.open(QIODevice::ReadOnly))
 		{
@@ -303,7 +303,7 @@ bool ForgeListLoadTask::parseForgeGradleList(QList<BaseVersionPtr> &out)
 	QByteArray data;
 	{
 		auto dlJob = gradleListDownload;
-		auto filename = std::dynamic_pointer_cast<CacheDownload>(dlJob)->m_target_path;
+		auto filename = std::dynamic_pointer_cast<CacheDownload>(dlJob)->getTargetFilepath();
 		QFile listFile(filename);
 		if (!listFile.open(QIODevice::ReadOnly))
 		{

logic/net/CacheDownload.cpp

@@ -40,7 +40,9 @@ void CacheDownload::start()
 		emit succeeded(m_index_within_job);
 		return;
 	}
-	m_output_file.setFileName(m_target_path);
+	// create a new save file
+	m_output_file.reset(new QSaveFile(m_target_path));
+
 	// if there already is a file and md5 checking is in effect and it can be opened
 	if (!ensureFilePathExists(m_target_path))
 	{
@@ -49,7 +51,7 @@ void CacheDownload::start()
 		emit failed(m_index_within_job);
 		return;
 	}
-	if (!m_output_file.open(QIODevice::WriteOnly))
+	if (!m_output_file->open(QIODevice::WriteOnly))
 	{
 		QLOG_ERROR() << "Could not open " + m_target_path + " for writing";
 		m_status = Job_Failed;
@@ -94,7 +96,7 @@ void CacheDownload::downloadProgress(qint64 bytesReceived, qint64 bytesTotal)
 void CacheDownload::downloadError(QNetworkReply::NetworkError error)
 {
 	// error happened during download.
-	QLOG_ERROR() << "Failed" << m_url.toString() << "with reason" << error;
+	QLOG_ERROR() << "Failed " << m_url.toString() << " with reason " << error;
 	m_status = Job_Failed;
 }
 void CacheDownload::downloadFinished()
@@ -102,17 +104,17 @@ void CacheDownload::downloadFinished()
 	// if the download succeeded
 	if (m_status == Job_Failed)
 	{
-		m_output_file.cancelWriting();
+		m_output_file->cancelWriting();
 		m_reply.reset();
-		m_status = Job_Failed;
 		emit failed(m_index_within_job);
 		return;
 	}
 
+	// if we wrote any data to the save file, we try to commit the data to the real file.
 	if (wroteAnyData)
 	{
 		// nothing went wrong...
-		if (m_output_file.commit())
+		if (m_output_file->commit())
 		{
 			m_status = Job_Finished;
 			m_entry->md5sum = md5sum.result().toHex().constData();
@@ -120,7 +122,7 @@ void CacheDownload::downloadFinished()
 		else
 		{
 			QLOG_ERROR() << "Failed to commit changes to " << m_target_path;
-			m_output_file.cancelWriting();
+			m_output_file->cancelWriting();
 			m_reply.reset();
 			m_status = Job_Failed;
 			emit failed(m_index_within_job);
@@ -132,6 +134,9 @@ void CacheDownload::downloadFinished()
 		m_status = Job_Finished;
 	}
 
+	// then get rid of the save file
+	m_output_file.reset();
+
 	QFileInfo output_file_info(m_target_path);
 
 	m_entry->etag = m_reply->rawHeader("ETag").constData();
@@ -153,7 +158,7 @@ void CacheDownload::downloadReadyRead()
 {
 	QByteArray ba = m_reply->readAll();
 	md5sum.addData(ba);
-	if (m_output_file.write(ba) != ba.size())
+	if (m_output_file->write(ba) != ba.size())
 	{
 		QLOG_ERROR() << "Failed writing into " + m_target_path;
 		m_status = Job_Failed;

logic/net/CacheDownload.h

@@ -24,12 +24,12 @@ typedef std::shared_ptr<class CacheDownload> CacheDownloadPtr;
 class CacheDownload : public NetAction
 {
 	Q_OBJECT
-public:
+private:
 	MetaEntryPtr m_entry;
 	/// if saving to file, use the one specified in this string
 	QString m_target_path;
 	/// this is the output file, if any
-	QSaveFile m_output_file;
+	std::shared_ptr<QSaveFile> m_output_file;
 	/// the hash-as-you-download
 	QCryptographicHash md5sum;
 
@@ -41,7 +41,10 @@ public:
 	{
 		return CacheDownloadPtr(new CacheDownload(url, entry));
 	}
-
+	QString getTargetFilepath()
+	{
+		return m_target_path;
+	}
 protected
 slots:
 	virtual void downloadProgress(qint64 bytesReceived, qint64 bytesTotal);

logic/updater/NotificationChecker.cpp

@@ -55,7 +55,7 @@ void NotificationChecker::downloadSucceeded(int)
 {
 	m_entries.clear();
 
-	QFile file(m_download->m_output_file.fileName());
+	QFile file(m_download->getTargetFilepath());
 	if (file.open(QFile::ReadOnly))
 	{
 		QJsonArray root = QJsonDocument::fromJson(file.readAll()).array();