gpt4all/chatlistmodel.h

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#ifndef CHATLISTMODEL_H
#define CHATLISTMODEL_H
#include <QAbstractListModel>
#include "chat.h"
class ChatListModel : public QAbstractListModel
{
Q_OBJECT
Q_PROPERTY(int count READ count NOTIFY countChanged)
Q_PROPERTY(Chat *currentChat READ currentChat WRITE setCurrentChat NOTIFY currentChatChanged)
public:
explicit ChatListModel(QObject *parent = nullptr)
: QAbstractListModel(parent)
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, m_currentChat(nullptr)
, m_newChat(nullptr)
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{
}
enum Roles {
IdRole = Qt::UserRole + 1,
NameRole
};
int rowCount(const QModelIndex &parent = QModelIndex()) const override
{
Q_UNUSED(parent)
return m_chats.size();
}
QVariant data(const QModelIndex &index, int role = Qt::DisplayRole) const override
{
if (!index.isValid() || index.row() < 0 || index.row() >= m_chats.size())
return QVariant();
const Chat *item = m_chats.at(index.row());
switch (role) {
case IdRole:
return item->id();
case NameRole:
return item->name();
}
return QVariant();
}
QHash<int, QByteArray> roleNames() const override
{
QHash<int, QByteArray> roles;
roles[IdRole] = "id";
roles[NameRole] = "name";
return roles;
}
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Q_INVOKABLE void addChat()
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{
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// Don't add a new chat if the current chat is empty
if (m_newChat)
return;
// Create a new chat pointer and connect it to determine when it is populated
m_newChat = new Chat(this);
connect(m_newChat->chatModel(), &ChatModel::countChanged,
this, &ChatListModel::newChatCountChanged);
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connect(m_newChat, &Chat::nameChanged,
this, &ChatListModel::nameChanged);
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beginInsertRows(QModelIndex(), 0, 0);
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m_chats.prepend(m_newChat);
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endInsertRows();
emit countChanged();
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setCurrentChat(m_newChat);
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}
Q_INVOKABLE void removeChat(Chat* chat)
{
if (!m_chats.contains(chat)) {
qDebug() << "WARNING: Removing chat failed with id" << chat->id();
return;
}
emit disconnectChat(chat);
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if (chat == m_newChat) {
m_newChat->disconnect(this);
m_newChat = nullptr;
}
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const int index = m_chats.indexOf(chat);
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if (m_chats.count() < 2) {
addChat();
} else {
int nextIndex;
if (index == m_chats.count() - 1)
nextIndex = index - 1;
else
nextIndex = index + 1;
Chat *nextChat = get(nextIndex);
Q_ASSERT(nextChat);
setCurrentChat(nextChat);
}
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const int newIndex = m_chats.indexOf(chat);
beginRemoveRows(QModelIndex(), newIndex, newIndex);
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m_chats.removeAll(chat);
endRemoveRows();
delete chat;
}
Chat *currentChat() const
{
return m_currentChat;
}
void setCurrentChat(Chat *chat)
{
if (!m_chats.contains(chat)) {
qDebug() << "ERROR: Setting current chat failed with id" << chat->id();
return;
}
if (m_currentChat) {
if (m_currentChat->isModelLoaded())
m_currentChat->unload();
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emit disconnect(m_currentChat);
}
emit connectChat(chat);
m_currentChat = chat;
if (!m_currentChat->isModelLoaded())
m_currentChat->reload();
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emit currentChatChanged();
}
Q_INVOKABLE Chat* get(int index)
{
if (index < 0 || index >= m_chats.size()) return nullptr;
return m_chats.at(index);
}
int count() const { return m_chats.size(); }
Q_SIGNALS:
void countChanged();
void connectChat(Chat*);
void disconnectChat(Chat*);
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void currentChatChanged();
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private Q_SLOTS:
void newChatCountChanged()
{
Q_ASSERT(m_newChat && m_newChat->chatModel()->count());
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m_newChat->chatModel()->disconnect(this);
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m_newChat = nullptr;
}
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void nameChanged()
{
Chat *chat = qobject_cast<Chat *>(sender());
if (!chat)
return;
int row = m_chats.indexOf(chat);
if (row < 0 || row >= m_chats.size())
return;
QModelIndex index = createIndex(row, 0);
emit dataChanged(index, index, {NameRole});
}
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void printChats()
{
for (auto c : m_chats) {
qDebug() << c->name()
<< (c == m_currentChat ? "currentChat: true" : "currentChat: false")
<< (c == m_newChat ? "newChat: true" : "newChat: false");
}
}
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private:
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Chat* m_newChat;
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Chat* m_currentChat;
QList<Chat*> m_chats;
};
#endif // CHATITEMMODEL_H