Other: move frontend C++ code ini a subfolder.

internal/frontend/bridge-gui/bridgepp/bridgepp/BridgeUtils.cpp

@@ -0,0 +1,56 @@
+// Copyright (c) 2022 Proton AG
+//
+// This file is part of Proton Mail Bridge.
+//
+// Proton Mail Bridge 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.
+//
+// Proton Mail Bridge 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 Proton Mail Bridge. If not, see <https://www.gnu.org/licenses/>.
+
+
+#include "BridgeUtils.h"
+#include "Exception/Exception.h"
+
+
+namespace bridgepp
+{
+
+//****************************************************************************************************************************************************
+/// \return user configuration directory used by bridge (based on Golang OS/File's UserConfigDir).
+//****************************************************************************************************************************************************
+QString userConfigDir()
+{
+    QString dir;
+#ifdef Q_OS_WIN
+    dir = qgetenv ("AppData");
+    if (dir.isEmpty())
+        throw Exception("%AppData% is not defined.");
+#elif defined(Q_OS_IOS) || defined(Q_OS_DARWIN)
+    dir = qgetenv("HOME");
+    if (dir.isEmpty())
+        throw Exception("$HOME is not defined.");
+    dir += "/Library/Application Support";
+#else
+    dir = qgetenv ("XDG_CONFIG_HOME");
+    if (dir.isEmpty())
+        dir = qgetenv ("HOME");
+    if (dir.isEmpty())
+        throw Exception("neither $XDG_CONFIG_HOME nor $HOME are defined");
+    dir += "/.config";
+#endif
+    QString folder = dir + "/protonmail/bridge";
+    QDir().mkpath(folder);
+
+    return folder;
+}
+
+
+} // namespace bridgepp