1 files changed, 132 insertions, 0 deletions
diff --git a/meshmc/launcher/net/FileSink.cpp b/meshmc/launcher/net/FileSink.cpp
new file mode 100644
index 0000000000..d9ee297e00
--- /dev/null
+++ b/meshmc/launcher/net/FileSink.cpp
@@ -0,0 +1,132 @@
+/* SPDX-FileCopyrightText: 2026 Project Tick
+ * SPDX-FileContributor: Project Tick
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ *
+ *   MeshMC - A Custom Launcher for Minecraft
+ *   Copyright (C) 2026 Project Tick
+ *
+ *   This program is free software: you can redistribute it and/or modify
+ *   it under the terms of the GNU General Public License as published by
+ *   the Free Software Foundation, either version 3 of the License, or
+ *   (at your option) any later version.
+ *
+ *   This program is distributed in the hope that it will be useful,
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *   GNU General Public License for more details.
+ *
+ *   You should have received a copy of the GNU General Public License
+ *   along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#include "FileSink.h"
+#include <QFile>
+#include <QFileInfo>
+#include "FileSystem.h"
+
+namespace Net
+{
+
+	FileSink::FileSink(QString filename) : m_filename(filename)
+	{
+		// nil
+	}
+
+	FileSink::~FileSink()
+	{
+		// nil
+	}
+
+	JobStatus FileSink::init(QNetworkRequest& request)
+	{
+		auto result = initCache(request);
+		if (result != Job_InProgress) {
+			return result;
+		}
+		// create a new save file and open it for writing
+		if (!FS::ensureFilePathExists(m_filename)) {
+			qCritical() << "Could not create folder for " + m_filename;
+			return Job_Failed;
+		}
+		wroteAnyData = false;
+		m_output_file.reset(new QSaveFile(m_filename));
+		if (!m_output_file->open(QIODevice::WriteOnly)) {
+			qCritical() << "Could not open " + m_filename + " for writing";
+			return Job_Failed;
+		}
+
+		if (initAllValidators(request))
+			return Job_InProgress;
+		return Job_Failed;
+	}
+
+	JobStatus FileSink::initCache(QNetworkRequest&)
+	{
+		return Job_InProgress;
+	}
+
+	JobStatus FileSink::write(QByteArray& data)
+	{
+		if (!writeAllValidators(data) ||
+			m_output_file->write(data) != data.size()) {
+			qCritical() << "Failed writing into " + m_filename;
+			m_output_file->cancelWriting();
+			m_output_file.reset();
+			wroteAnyData = false;
+			return Job_Failed;
+		}
+		wroteAnyData = true;
+		return Job_InProgress;
+	}
+
+	JobStatus FileSink::abort()
+	{
+		m_output_file->cancelWriting();
+		failAllValidators();
+		return Job_Failed;
+	}
+
+	JobStatus FileSink::finalize(QNetworkReply& reply)
+	{
+		bool gotFile = false;
+		QVariant statusCodeV =
+			reply.attribute(QNetworkRequest::HttpStatusCodeAttribute);
+		bool validStatus = false;
+		int statusCode = statusCodeV.toInt(&validStatus);
+		if (validStatus) {
+			// this leaves out 304 Not Modified
+			gotFile = statusCode == 200 || statusCode == 203;
+		}
+		// if we wrote any data to the save file, we try to commit the data to
+		// the real file. if it actually got a proper file, we write it even if
+		// it was empty
+		if (gotFile || wroteAnyData) {
+			// ask validators for data consistency
+			// we only do this for actual downloads, not 'your data is still the
+			// same' cache hits
+			if (!finalizeAllValidators(reply))
+				return Job_Failed;
+			// nothing went wrong...
+			if (!m_output_file->commit()) {
+				qCritical() << "Failed to commit changes to " << m_filename;
+				m_output_file->cancelWriting();
+				return Job_Failed;
+			}
+		}
+		// then get rid of the save file
+		m_output_file.reset();
+
+		return finalizeCache(reply);
+	}
+
+	JobStatus FileSink::finalizeCache(QNetworkReply&)
+	{
+		return Job_Finished;
+	}
+
+	bool FileSink::hasLocalData()
+	{
+		QFileInfo info(m_filename);
+		return info.exists() && info.size() != 0;
+	}
+} // namespace Net