feat(updater): tie in updater part 1

Signed-off-by: Rachel Powers <508861+Ryex@users.noreply.github.com>

launcher/updater/PrismExternalUpdater.h

@@ -0,0 +1,94 @@
+// SPDX-FileCopyrightText: 2023 Rachel Powers <508861+Ryex@users.noreply.github.com>
+//
+// SPDX-License-Identifier: GPL-3.0-only
+
+/*
+ *  Prism Launcher - Minecraft Launcher
+ *  Copyright (C) 2023 Rachel Powers <508861+Ryex@users.noreply.github.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 <QObject>
+
+#include "ExternalUpdater.h"
+
+/*!
+ * An implementation for the updater on windows and linux that uses out external updater.
+ */
+
+class PrismExternalUpdater : public ExternalUpdater {
+    Q_OBJECT
+
+   public:
+  PrismExternalUpdater(const QString& appDir, const QString& dataDir);
+    ~PrismExternalUpdater() override;
+
+    /*!
+     * Check for updates manually, showing the user a progress bar and an alert if no updates are found.
+     */
+    void checkForUpdates() override;
+
+    /*!
+     * Indicates whether or not to check for updates automatically.
+     */
+    bool getAutomaticallyChecksForUpdates() override;
+
+    /*!
+     * Indicates the current automatic update check interval in seconds.
+     */
+    double getUpdateCheckInterval() override;
+
+    /*!
+     * Indicates whether or not beta updates should be checked for in addition to regular releases.
+     */
+    bool getBetaAllowed() override;
+
+    /*!
+     * Set whether or not to check for updates automatically.
+     *
+     * The update schedule cycle will be reset in a short delay after the property’s new value is set. This is to allow
+     * reverting this property without kicking off a schedule change immediately."
+     */
+    void setAutomaticallyChecksForUpdates(bool check) override;
+
+    /*!
+     * Set the current automatic update check interval in seconds.
+     *
+     * The update schedule cycle will be reset in a short delay after the property’s new value is set. This is to allow
+     * reverting this property without kicking off a schedule change immediately."
+     */
+    void setUpdateCheckInterval(double seconds) override;
+
+    /*!
+     * Set whether or not beta updates should be checked for in addition to regular releases.
+     */
+    void setBetaAllowed(bool allowed) override;
+
+    void resetAutoCheckTimer();
+    void disconnectTimer();
+    void connectTimer();
+
+    void performUpdate();
+
+   public slots:
+    void autoCheckTimerFired();
+
+   private:
+    class Private;
+
+    Private* priv;
+};