1 files changed, 141 insertions, 0 deletions
diff --git a/meshmc/launcher/updater/GoUpdate.h b/meshmc/launcher/updater/GoUpdate.h
new file mode 100644
index 0000000000..d192ab53cd
--- /dev/null
+++ b/meshmc/launcher/updater/GoUpdate.h
@@ -0,0 +1,141 @@
+/* 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/>.
+ */
+
+#pragma once
+#include <QByteArray>
+#include <net/NetJob.h>
+
+namespace GoUpdate
+{
+
+	/**
+	 * A temporary object exchanged between updated checker and the actual
+	 * update task
+	 */
+	struct Status {
+		bool updateAvailable = false;
+
+		int newVersionId = -1;
+		QString newRepoUrl;
+
+		int currentVersionId = -1;
+		QString currentRepoUrl;
+
+		// path to the root of the application
+		QString rootPath;
+	};
+
+	/**
+	 * Struct that describes an entry in a VersionFileEntry's `Sources` list.
+	 */
+	struct FileSource {
+		FileSource(QString type, QString url, QString compression = "")
+		{
+			this->type = type;
+			this->url = url;
+			this->compressionType = compression;
+		}
+
+		bool operator==(const FileSource& f2) const
+		{
+			return type == f2.type && url == f2.url &&
+				   compressionType == f2.compressionType;
+		}
+
+		QString type;
+		QString url;
+		QString compressionType;
+	};
+	typedef QList<FileSource> FileSourceList;
+
+	/**
+	 * Structure that describes an entry in a GoUpdate version's `Files` list.
+	 */
+	struct VersionFileEntry {
+		QString path;
+		int mode;
+		FileSourceList sources;
+		QString md5;
+		bool operator==(const VersionFileEntry& v2) const
+		{
+			return path == v2.path && mode == v2.mode &&
+				   sources == v2.sources && md5 == v2.md5;
+		}
+	};
+	typedef QList<VersionFileEntry> VersionFileList;
+
+	/**
+	 * Structure that describes an operation to perform when installing updates.
+	 */
+	struct Operation {
+		static Operation CopyOp(QString from, QString to, int fmode = 0644)
+		{
+			return Operation{OP_REPLACE, from, to, fmode};
+		}
+		static Operation DeleteOp(QString file)
+		{
+			return Operation{OP_DELETE, QString(), file, 0644};
+		}
+
+		// FIXME: for some types, some of the other fields are irrelevant!
+		bool operator==(const Operation& u2) const
+		{
+			return type == u2.type && source == u2.source &&
+				   destination == u2.destination &&
+				   destinationMode == u2.destinationMode;
+		}
+
+		//! Specifies the type of operation that this is.
+		enum Type {
+			OP_REPLACE,
+			OP_DELETE,
+		} type;
+
+		//! The source file, if any
+		QString source;
+
+		//! The destination file.
+		QString destination;
+
+		//! The mode to change the destination file to.
+		int destinationMode;
+	};
+	typedef QList<Operation> OperationList;
+
+	/**
+	 * Loads the file list from the given version info JSON object into the
+	 * given list.
+	 */
+	bool parseVersionInfo(const QByteArray& data, VersionFileList& list,
+						  QString& error);
+
+	/*!
+	 * Takes a list of file entries for the current version's files and the new
+	 * version's files and populates the downloadList and operationList with
+	 * information about how to download and install the update.
+	 */
+	bool processFileLists(const VersionFileList& currentVersion,
+						  const VersionFileList& newVersion,
+						  const QString& rootPath, const QString& tempPath,
+						  NetJob::Ptr job, OperationList& ops);
+
+} // namespace GoUpdate
+Q_DECLARE_METATYPE(GoUpdate::Status)