Move login and registration to login

To make this work `AccountManager` is split off from controller taking all the code around `AccountRegister` and is added to LibNeoChat as it makes sense to have this functionality there.

src/libneochat/accountmanager.h

@@ -0,0 +1,103 @@
+// SPDX-FileCopyrightText: 2023 James Graham <james.h.graham@protonmail.com>
+// SPDX-License-Identifier: GPL-2.0-only OR GPL-3.0-only OR LicenseRef-KDE-Accepted-GPL
+
+#pragma once
+
+#include <QObject>
+
+#include <Quotient/accountregistry.h>
+
+#include "neochatconnection.h"
+
+class AccountManager : public QObject
+{
+    Q_OBJECT
+
+public:
+    explicit AccountManager(bool testMode = false, QObject *parent = nullptr);
+
+    Quotient::AccountRegistry *accounts();
+
+    /**
+     * @brief Load the accounts saved in the app cache.
+     *
+     * This should be called on app startup to retrieve accounts logged in, in a
+     * previous sessions.
+     */
+    void loadAccountsFromCache();
+
+    /**
+     * @brief The accounts currently being loaded from cache.
+     */
+    QStringList accountsLoading() const;
+
+    /**
+     * @brief Get the primary connection being displayed in the rest of the app.
+     */
+    NeoChatConnection *activeConnection() const;
+
+    /**
+     * @brief Set the primary connection being displayed in the rest of the app.
+     */
+    void setActiveConnection(NeoChatConnection *connection);
+
+    /**
+     * @brief Add a new connection to the account registry.
+     */
+    void addConnection(NeoChatConnection *connection);
+
+    /**
+     * @brief Drop a connection from the account registry.
+     */
+    Q_INVOKABLE void dropConnection(const QString &userId);
+
+    /**
+     * @brief Drop a connection from the account registry.
+     */
+    void dropConnection(NeoChatConnection *connection);
+
+Q_SIGNALS:
+    /**
+     * @brief Request a error message be shown to the user.
+     */
+    void errorOccured(const QString &error);
+
+    /**
+     * @brief The list of accounts loading the access token from keychain has changed.
+     */
+    void accountsLoadingChanged();
+
+    /**
+     * @brief The list of connection loading has changed.
+     */
+    void connectionLoadingChanged();
+
+    /**
+     * @brief The given connection has been added.
+     */
+    void connectionAdded(NeoChatConnection *connection);
+
+    /**
+     * @brief The given connection has been dropped.
+     */
+    void connectionDropped(NeoChatConnection *connection);
+
+    /**
+     * @brief The primary connection being displayed in the rest of the app has changed.
+     */
+    void activeConnectionChanged(NeoChatConnection *oldConnection, NeoChatConnection *newConnection);
+
+private:
+    QPointer<Quotient::AccountRegistry> m_accountRegistry;
+    QStringList m_accountsLoading;
+    QMap<QString, QPointer<NeoChatConnection>> m_connectionsLoading;
+
+    void saveAccessTokenToKeyChain(NeoChatConnection *connection);
+    QKeychain::ReadPasswordJob *loadAccessTokenFromKeyChain(const QString &userId);
+
+    bool dropAccountLoading(const QString &userId);
+    bool dropConnectionLoading(NeoChatConnection *connection);
+    bool dropRegistry(NeoChatConnection *connection);
+
+    QPointer<NeoChatConnection> m_activeConnection;
+};