Resource metadata writing

Signed-off-by: TheKodeToad <TheKodeToad@proton.me>

launcher/minecraft/mod/tasks/LocalResourceUpdateTask.h

@@ -0,0 +1,47 @@
+// SPDX-License-Identifier: GPL-3.0-only
+/*
+ *  Prism Launcher - Minecraft Launcher
+ *  Copyright (c) 2022 flowln <flowlnlnln@gmail.com>
+ *
+ *  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, version 3.
+ *
+ *  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 <QDir>
+
+#include "modplatform/ModIndex.h"
+#include "tasks/Task.h"
+
+class LocalResourceUpdateTask : public Task {
+    Q_OBJECT
+   public:
+    using Ptr = shared_qobject_ptr<LocalResourceUpdateTask>;
+
+    explicit LocalResourceUpdateTask(QDir index_dir, ModPlatform::IndexedPack& project, ModPlatform::IndexedVersion& version);
+
+    auto canAbort() const -> bool override { return true; }
+    auto abort() -> bool override;
+
+   protected slots:
+    //! Entry point for tasks.
+    void executeTask() override;
+
+   signals:
+    void hasOldResource(QString name, QString filename);
+
+   private:
+    QDir m_index_dir;
+    ModPlatform::IndexedPack& m_project;
+    ModPlatform::IndexedVersion& m_version;
+};