1 files changed, 86 insertions, 0 deletions
diff --git a/meshmc/launcher/net/MetaCacheSink.cpp b/meshmc/launcher/net/MetaCacheSink.cpp
new file mode 100644
index 0000000000..7c8d8575fd
--- /dev/null
+++ b/meshmc/launcher/net/MetaCacheSink.cpp
@@ -0,0 +1,86 @@
+/* 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 "MetaCacheSink.h"
+#include <QFile>
+#include <QFileInfo>
+#include "FileSystem.h"
+#include "Application.h"
+
+namespace Net
+{
+
+	MetaCacheSink::MetaCacheSink(MetaEntryPtr entry, ChecksumValidator* md5sum)
+		: Net::FileSink(entry->getFullPath()), m_entry(entry), m_md5Node(md5sum)
+	{
+		addValidator(md5sum);
+	}
+
+	MetaCacheSink::~MetaCacheSink()
+	{
+		// nil
+	}
+
+	JobStatus MetaCacheSink::initCache(QNetworkRequest& request)
+	{
+		if (!m_entry->isStale()) {
+			return Job_Finished;
+		}
+		// check if file exists, if it does, use its information for the request
+		QFile current(m_filename);
+		if (current.exists() && current.size() != 0) {
+			if (m_entry->getRemoteChangedTimestamp().size()) {
+				request.setRawHeader(
+					QString("If-Modified-Since").toLatin1(),
+					m_entry->getRemoteChangedTimestamp().toLatin1());
+			}
+			if (m_entry->getETag().size()) {
+				request.setRawHeader(QString("If-None-Match").toLatin1(),
+									 m_entry->getETag().toLatin1());
+			}
+		}
+		return Job_InProgress;
+	}
+
+	JobStatus MetaCacheSink::finalizeCache(QNetworkReply& reply)
+	{
+		QFileInfo output_file_info(m_filename);
+		if (wroteAnyData) {
+			m_entry->setMD5Sum(m_md5Node->hash().toHex().constData());
+		}
+		m_entry->setETag(reply.rawHeader("ETag").constData());
+		if (reply.hasRawHeader("Last-Modified")) {
+			m_entry->setRemoteChangedTimestamp(
+				reply.rawHeader("Last-Modified").constData());
+		}
+		m_entry->setLocalChangedTimestamp(
+			output_file_info.lastModified().toUTC().toMSecsSinceEpoch());
+		m_entry->setStale(false);
+		APPLICATION->metacache()->updateEntry(m_entry);
+		return Job_Finished;
+	}
+
+	bool MetaCacheSink::hasLocalData()
+	{
+		QFileInfo info(m_filename);
+		return info.exists() && info.size() != 0;
+	}
+} // namespace Net