Move saving chats to a thread and display what we're doing to the user.

gpt4all-chat/chatlistmodel.cpp

@@ -63,11 +63,17 @@ void ChatListModel::removeChatFile(Chat *chat) const
         qWarning() << "ERROR: Couldn't remove chat file:" << file.fileName();
 }
 
-void ChatListModel::saveChats() const
+ChatSaver::ChatSaver()
+    : QObject(nullptr)
+{
+    moveToThread(&m_thread);
+    m_thread.start();
+}
+
+void ChatListModel::saveChats()
 {
-    QElapsedTimer timer;
-    timer.start();
     const QString savePath = Download::globalInstance()->downloadLocalModelsPath();
+    QVector<Chat*> toSave;
     for (Chat *chat : m_chats) {
         if (chat == m_serverChat)
             continue;
@@ -76,6 +82,23 @@ void ChatListModel::saveChats() const
             continue;
         if (isChatGPT && !m_shouldSaveChatGPTChats)
             continue;
+        toSave.append(chat);
+    }
+    if (toSave.isEmpty())
+        return;
+
+    ChatSaver *saver = new ChatSaver;
+    connect(this, &ChatListModel::requestSaveChats, saver, &ChatSaver::saveChats, Qt::QueuedConnection);
+    connect(saver, &ChatSaver::saveChatsFinished, this, &ChatListModel::saveChatsFinished, Qt::QueuedConnection);
+    emit requestSaveChats(toSave);
+}
+
+void ChatSaver::saveChats(const QVector<Chat *> &chats)
+{
+    QElapsedTimer timer;
+    timer.start();
+    const QString savePath = Download::globalInstance()->downloadLocalModelsPath();
+    for (Chat *chat : chats) {
         QString fileName = "gpt4all-" + chat->id() + ".chat";
         QFile file(savePath + "/" + fileName);
         bool success = file.open(QIODevice::WriteOnly);
@@ -98,6 +121,7 @@ void ChatListModel::saveChats() const
     }
     qint64 elapsedTime = timer.elapsed();
     qDebug() << "serializing chats took:" << elapsedTime << "ms";
+    emit saveChatsFinished();
 }
 
 void ChatsRestoreThread::run()

gpt4all-chat/chatlistmodel.h

@@ -14,6 +14,23 @@ Q_SIGNALS:
     void chatRestored(Chat *chat);
 };
 
+class ChatSaver : public QObject
+{
+    Q_OBJECT
+public:
+    explicit ChatSaver();
+    void stop();
+
+Q_SIGNALS:
+    void saveChatsFinished();
+
+public Q_SLOTS:
+    void saveChats(const QVector<Chat*> &chats);
+
+private:
+    QThread m_thread;
+};
+
 class ChatListModel : public QAbstractListModel
 {
     Q_OBJECT
@@ -190,7 +207,7 @@ public:
     int count() const { return m_chats.size(); }
 
     void removeChatFile(Chat *chat) const;
-    void saveChats() const;
+    Q_INVOKABLE void saveChats();
     void restoreChat(Chat *chat);
     void chatsRestoredFinished();
 
@@ -202,6 +219,9 @@ Q_SIGNALS:
     void currentChatChanged();
     void shouldSaveChatsChanged();
     void shouldSaveChatGPTChatsChanged();
+    void chatsSavedFinished();
+    void requestSaveChats(const QVector<Chat*> &);
+    void saveChatsFinished();
 
 private Q_SLOTS:
     void newChatCountChanged()

gpt4all-chat/llm.cpp

@@ -38,9 +38,6 @@ LLM::LLM()
         llmodelSearchPaths += ";" + frameworksDir;
 #endif
     LLModel::setImplementationsSearchPath(llmodelSearchPaths.toStdString());
-
-    connect(QCoreApplication::instance(), &QCoreApplication::aboutToQuit,
-        this, &LLM::aboutToQuit);
     connect(this, &LLM::serverEnabledChanged,
         m_chatListModel, &ChatListModel::handleServerEnabledChanged);
 
@@ -123,8 +120,3 @@ void LLM::setServerEnabled(bool enabled)
     m_serverEnabled = enabled;
     emit serverEnabledChanged();
 }
-
-void LLM::aboutToQuit()
-{
-    m_chatListModel->saveChats();
-}

gpt4all-chat/llm.h

@@ -34,9 +34,6 @@ Q_SIGNALS:
     void serverEnabledChanged();
     void compatHardwareChanged();
 
-private Q_SLOTS:
-    void aboutToQuit();
-
 private:
     ChatListModel *m_chatListModel;
     int32_t m_threadCount;

gpt4all-chat/main.qml

@@ -24,6 +24,25 @@ Window {
 
     property var currentChat: LLM.chatListModel.currentChat
     property var chatModel: currentChat.chatModel
+    property bool hasSaved: false
+
+    onClosing: function(close) {
+        if (window.hasSaved)
+            return;
+
+        savingPopup.open();
+        LLM.chatListModel.saveChats();
+        close.accepted = false
+    }
+
+    Connections {
+        target: LLM.chatListModel
+        function onSaveChatsFinished() {
+            window.hasSaved = true;
+            savingPopup.close();
+            window.close()
+        }
+    }
 
     color: theme.backgroundDarkest
 
@@ -406,6 +425,14 @@ Window {
         }
     }
 
+    PopupDialog {
+        id: savingPopup
+        anchors.centerIn: parent
+        shouldTimeOut: false
+        shouldShowBusy: true
+        text: qsTr("Saving chats.")
+    }
+
     MyToolButton {
         id: copyButton
         anchors.right: settingsButton.left