1 files changed, 82 insertions, 0 deletions
diff --git a/meshmc/launcher/UpdateController.cpp b/meshmc/launcher/UpdateController.cpp
new file mode 100644
index 0000000000..af46800dfe
--- /dev/null
+++ b/meshmc/launcher/UpdateController.cpp
@@ -0,0 +1,82 @@
+/* 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 "UpdateController.h"
+
+#include <QApplication>
+#include <QDebug>
+#include <QDir>
+#include <QMessageBox>
+#include <QProcess>
+
+#include "BuildConfig.h"
+#include "FileSystem.h"
+
+UpdateController::UpdateController(QWidget* parent, const QString& root,
+								   const QString& downloadUrl)
+	: m_parent(parent), m_root(root), m_downloadUrl(downloadUrl)
+{
+}
+
+bool UpdateController::startUpdate()
+{
+	// Locate the updater binary next to ourselves.
+	QString updaterName = BuildConfig.MESHMC_NAME + "-updater";
+#ifdef Q_OS_WIN
+	updaterName += ".exe";
+#endif
+	const QString updaterPath = FS::PathCombine(m_root, updaterName);
+
+	if (!QFile::exists(updaterPath)) {
+		qCritical() << "UpdateController: updater binary not found at"
+					<< updaterPath;
+		QMessageBox::critical(
+			m_parent,
+			QCoreApplication::translate("UpdateController",
+										"Updater Not Found"),
+			QCoreApplication::translate("UpdateController",
+										"The updater binary could not be found "
+										"at:\n%1\n\nPlease reinstall %2.")
+				.arg(updaterPath, BuildConfig.MESHMC_DISPLAYNAME));
+		return false;
+	}
+
+	const QStringList args = {"--url",	m_downloadUrl,
+							  "--root", m_root,
+							  "--exec", QApplication::applicationFilePath()};
+
+	qDebug() << "UpdateController: launching" << updaterPath << "with args"
+			 << args;
+	const bool ok = QProcess::startDetached(updaterPath, args);
+	if (!ok) {
+		qCritical() << "UpdateController: failed to start updater binary.";
+		QMessageBox::critical(
+			m_parent,
+			QCoreApplication::translate("UpdateController", "Update Failed"),
+			QCoreApplication::translate("UpdateController",
+										"Could not launch the updater "
+										"binary.\nPlease update %1 manually.")
+				.arg(BuildConfig.MESHMC_DISPLAYNAME));
+		return false;
+	}
+
+	return true;
+}