refactor/fix switching profile with separate settings

src/core.cpp

@@ -1150,8 +1150,8 @@ QString Core::sanitize(QString name)
 
 bool Core::loadConfiguration(QString path)
 {
-    loadPath = ""; // if not empty, then user forgot a password
+    loadPath = ""; // if not empty upon return, then user forgot a password and is switching
-    // setting the profile is now the responsibility of the caller
+
     QFile configurationFile(path);
     qDebug() << "Core::loadConfiguration: reading from " << path;
 
@@ -1183,17 +1183,17 @@ bool Core::loadConfiguration(QString path)
                 QMetaObject::invokeMethod(Widget::getInstance(), "askProfiles", Qt::BlockingQueuedConnection, Q_RETURN_ARG(QString, profile));
 
                 if (!profile.isEmpty())
+                {
                     loadPath = QDir(Settings::getSettingsDirPath()).filePath(profile + TOX_EXT);
+                    Settings::getInstance().switchProfile(profile);
+                    HistoryKeeper::getInstance()->resetInstance();
+                }
                 return false;
             }
         }
     }
     configurationFile.close();
 
-    Settings::getInstance().setCurrentProfile(QFileInfo(path).completeBaseName());
-    // this is necessary for anything that doesn't call switchConfiguration, i.e.
-    // forgetting a password and choosing a different profile
-
     // set GUI with user and statusmsg
     QString name = getUsername();
     if (!name.isEmpty())
@@ -1233,7 +1233,7 @@ void Core::saveConfiguration()
         if (profile == "") // happens on creation of a new Tox ID
             profile = getIDString();
 
-        Settings::getInstance().setCurrentProfile(profile);
+        Settings::getInstance().switchProfile(profile);
     }
     
     QString path = directory.filePath(profile + TOX_EXT);
@@ -1266,11 +1266,7 @@ void Core::switchConfiguration(const QString& profile)
     else
         loadPath = QDir(Settings::getSettingsDirPath()).filePath(profile + TOX_EXT);
 
-    // the new profile needs to be set before resetting the settings, so that
+    Settings::getInstance().switchProfile(profile);
-    // we don't load the old profile's profile.ini
-    Settings::getInstance().setCurrentProfile(profile);
-    Settings::getInstance().save(false); // save new profile, but don't write old profile info to newprofile.ini
-    Settings::resetInstance();
     HistoryKeeper::getInstance()->resetInstance();
 
     start();

src/misc/settings.cpp

@@ -63,6 +63,13 @@ void Settings::resetInstance()
     }
 }
 
+void Settings::switchProfile(const QString& profile)
+{
+    setCurrentProfile(profile);
+    save(false);
+    resetInstance();
+}
+
 void Settings::load()
 {
     if (loaded)

src/misc/settings.h

@@ -30,6 +30,7 @@ class Settings : public QObject
 public:
     static Settings& getInstance();
     static void resetInstance();
+    void switchProfile(const QString& profile);
     ~Settings() = default;
 
     void executeSettingsDialog(QWidget* parent);

src/widget/widget.cpp

@@ -402,7 +402,10 @@ QString Widget::detectProfile()
             if (profile.isEmpty())
                 return "";
             else
+            {
+                Settings::getInstance().setCurrentProfile(profile);
                 return dir.filePath(profile + Core::TOX_EXT);
+            }
         }
     }
     else