Qt updater integration, based on QtAutoUpdater

src/citra_qt/updater/updater_p.h

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+// Copyright 2017 Citra Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+//
+// Based on the original work by Felix Barx
+// Copyright (c) 2015, Felix Barz
+// All rights reserved.
+
+#pragma once
+
+#include <QtCore/QProcess>
+#include "citra_qt/updater/updater.h"
+
+enum class XMLParseResult {
+    Success,
+    NoUpdate,
+    InvalidXML,
+};
+
+class UpdaterPrivate : public QObject {
+    Q_OBJECT;
+
+public:
+    explicit UpdaterPrivate(Updater* parent_ptr);
+    ~UpdaterPrivate();
+
+    static QString ToSystemExe(QString base_path);
+
+    bool HasUpdater() const;
+
+    bool StartUpdateCheck();
+
+    void LaunchWithArguments(const QStringList& args);
+    void LaunchUI();
+    void SilentlyUpdate();
+
+    void LaunchUIOnExit();
+
+public slots:
+	void StopUpdateCheck(int delay, bool async);
+    void UpdaterReady(int exit_code, QProcess::ExitStatus exit_status);
+    void UpdaterError(QProcess::ProcessError error);
+
+    void AboutToExit();
+
+private:
+    XMLParseResult ParseResult(const QByteArray& output, QList<Updater::UpdateInfo>& out);
+
+    Updater* parent;
+
+    QString tool_path{};
+    QList<Updater::UpdateInfo> update_info{};
+    bool normal_exit = true;
+    int last_error_code = 0;
+    QByteArray last_error_log = EXIT_SUCCESS;
+
+    bool running = false;
+    QProcess* main_process = nullptr;
+
+    bool launch_ui_on_exit = false;
+
+    QStringList run_arguments{"--updater"};
+    QStringList silent_arguments{"--silentUpdate"};
+
+    friend class Updater;
+};