Add migration code for WebUI https related change

src/app/CMakeLists.txt

@@ -7,6 +7,7 @@ application.cpp
 cmdoptions.cpp
 filelogger.cpp
 main.cpp
+upgrade.cpp
 )
 
 target_include_directories(qBittorrent PRIVATE ${CMAKE_CURRENT_BINARY_DIR})

src/app/app.pri

@@ -17,13 +17,15 @@ usesystemqtsingleapplication {
 HEADERS += \
     $$PWD/application.h \
     $$PWD/cmdoptions.h \
-    $$PWD/filelogger.h
+    $$PWD/filelogger.h \
+    $$PWD/upgrade.h
 
 SOURCES += \
     $$PWD/application.cpp \
     $$PWD/cmdoptions.cpp \
     $$PWD/filelogger.cpp \
-    $$PWD/main.cpp
+    $$PWD/main.cpp \
+    $$PWD/upgrade.cpp
 
 stacktrace {
     unix {
@@ -37,6 +39,3 @@ stacktrace {
         }
     }
 }
-
-# upgrade code
-HEADERS += $$PWD/upgrade.h

src/app/upgrade.cpp

@@ -0,0 +1,84 @@
+/*
+ * Bittorrent Client using Qt and libtorrent.
+ * Copyright (C) 2019  Mike Tzou (Chocobo1)
+ *
+ * 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; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * 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, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+ *
+ * In addition, as a special exception, the copyright holders give permission to
+ * link this program with the OpenSSL project's "OpenSSL" library (or with
+ * modified versions of it that use the same license as the "OpenSSL" library),
+ * and distribute the linked executables. You must obey the GNU General Public
+ * License in all respects for all of the code used other than "OpenSSL".  If you
+ * modify file(s), you may extend this exception to your version of the file(s),
+ * but you are not obligated to do so. If you do not wish to do so, delete this
+ * exception statement from your version.
+ */
+
+#include "upgrade.h"
+
+#include <QFile>
+
+#include "base/logger.h"
+#include "base/profile.h"
+#include "base/settingsstorage.h"
+#include "base/utils/fs.h"
+
+namespace
+{
+    void exportWebUIHttpsFiles()
+    {
+        const auto migrate = [](const QString &oldKey, const QString &newKey, const QString &savePath) {
+            SettingsStorage *settingsStorage {SettingsStorage::instance()};
+            const QByteArray oldData {settingsStorage->loadValue(oldKey).toByteArray()};
+            const QString newData {settingsStorage->loadValue(newKey).toString()};
+            const QString errorMsgFormat {QObject::tr("Migrate preferences failed: WebUI https, file: \"%1\", error: \"%2\"")};
+
+            if (!newData.isEmpty() || oldData.isEmpty())
+                return;
+
+            QFile file(savePath);
+            if (!file.open(QIODevice::WriteOnly)) {
+                LogMsg(errorMsgFormat.arg(savePath, file.errorString()) , Log::WARNING);
+                return;
+            }
+            if (file.write(oldData) != oldData.size()) {
+                file.close();
+                Utils::Fs::forceRemove(savePath);
+                LogMsg(errorMsgFormat.arg(savePath, QLatin1String("Write incomplete.")) , Log::WARNING);
+                return;
+            }
+
+            settingsStorage->storeValue(newKey, savePath);
+            settingsStorage->removeValue(oldKey);
+
+            LogMsg(QObject::tr("Migrated preferences: WebUI https, exported data to file: \"%1\"").arg(savePath)
+                , Log::INFO);
+        };
+
+        const QString configPath {specialFolderLocation(SpecialFolder::Config)};
+        migrate(QLatin1String("Preferences/WebUI/HTTPS/Certificate")
+            , QLatin1String("Preferences/WebUI/HTTPS/CertificatePath")
+            , Utils::Fs::toNativePath(configPath + QLatin1String("WebUICertificate.crt")));
+        migrate(QLatin1String("Preferences/WebUI/HTTPS/Key")
+            , QLatin1String("Preferences/WebUI/HTTPS/KeyPath")
+            , Utils::Fs::toNativePath(configPath + QLatin1String("WebUIPrivateKey.pem")));
+    }
+}
+
+bool upgrade(const bool /*ask*/)
+{
+    exportWebUIHttpsFiles();
+    return true;
+}

src/app/upgrade.h

@@ -28,9 +28,4 @@
 
 #pragma once
 
-bool upgrade(bool /*ask*/ = true)
-{
-    // Intentionally left no-op as a placeholder for future use
-
-    return true;
-}
+bool upgrade(bool ask = true);