fix: treat accounts as offline, if auth servers are down

Signed-off-by: Sefa Eyeoglu <contact@scrumplex.net>

launcher/net/NetUtils.h

@@ -0,0 +1,44 @@
+// SPDX-License-Identifier: GPL-3.0-only
+/*
+ * PolyMC - Minecraft Launcher
+ * Copyright (c) 2022 Sefa Eyeoglu <contact@scrumplex.net>
+ *
+ * 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 <QNetworkReply>
+#include <QSet>
+
+namespace Net {
+    inline bool isApplicationError(QNetworkReply::NetworkError x) {
+        // Mainly taken from https://github.com/qt/qtbase/blob/dev/src/network/access/qhttpthreaddelegate.cpp
+        static QSet<QNetworkReply::NetworkError> errors = {
+            QNetworkReply::ProtocolInvalidOperationError,
+            QNetworkReply::AuthenticationRequiredError,
+            QNetworkReply::ContentAccessDenied,
+            QNetworkReply::ContentNotFoundError,
+            QNetworkReply::ContentOperationNotPermittedError,
+            QNetworkReply::ProxyAuthenticationRequiredError,
+            QNetworkReply::ContentConflictError,
+            QNetworkReply::ContentGoneError,
+            QNetworkReply::InternalServerError,
+            QNetworkReply::OperationNotImplementedError,
+            QNetworkReply::ServiceUnavailableError,
+            QNetworkReply::UnknownServerError,
+            QNetworkReply::UnknownContentError
+        };
+        return errors.contains(x);
+    }
+}  // namespace Net