refactoring: UI squawk now belongs to a new class, it enables me doing trayed mode, when main window is destroyed

main/application.h

@@ -0,0 +1,111 @@
+// Squawk messenger. 
+// Copyright (C) 2019  Yury Gubich <blue@macaw.me>
+// 
+// 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 3 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, see <http://www.gnu.org/licenses/>.
+
+#ifndef APPLICATION_H
+#define APPLICATION_H
+
+#include <map>
+
+#include <QObject>
+#include <QDBusInterface>
+
+#include "dialogqueue.h"
+#include "core/squawk.h"
+
+#include "ui/squawk.h"
+#include "ui/models/roster.h"
+#include "ui/widgets/conversation.h"
+
+#include "shared/message.h"
+#include "shared/enums.h"
+
+/**
+ * @todo write docs
+ */
+class Application : public QObject
+{
+    Q_OBJECT
+public:
+    Application(Core::Squawk* core);
+    ~Application();
+
+    bool isConverstationOpened(const Models::Roster::ElId& id) const;
+
+signals:
+    void sendMessage(const QString& account, const Shared::Message& data);
+    void replaceMessage(const QString& account, const QString& originalId, const Shared::Message& data);
+    void resendMessage(const QString& account, const QString& jid, const QString& id);
+
+    void changeState(Shared::Availability state);
+
+    void setRoomJoined(const QString& account, const QString& jid, bool joined);
+    void setRoomAutoJoin(const QString& account, const QString& jid, bool joined);
+    void subscribeContact(const QString& account, const QString& jid, const QString& reason);
+    void unsubscribeContact(const QString& account, const QString& jid, const QString& reason);
+
+    void quitting();
+    void readyToQuit();
+
+public slots:
+    void readSettings();
+    void quit();
+
+protected slots:
+    void notify(const QString& account, const Shared::Message& msg);
+    void setState(Shared::Availability availability);
+
+    void changeAccount(const QString& account, const QMap<QString, QVariant>& data);
+    void removeAccount(const QString& account);
+    void openConversation(const Models::Roster::ElId& id, const QString& resource = "");
+
+    void addGroup(const QString& account, const QString& name);
+    void addContact(const QString& account, const QString& jid, const QString& group, const QMap<QString, QVariant>& data);
+
+    void requestPassword(const QString& account, bool authenticationError);
+
+    void writeSettings();
+
+private slots:
+    void onConversationClosed();
+    void changeSubscription(const Models::Roster::ElId& id, bool subscribe);
+    void onSquawkOpenedConversation();
+    void onConversationMessage(const Shared::Message& msg);
+    void onConversationReplaceMessage(const QString& originalId, const Shared::Message& msg);
+    void onConversationResend(const QString& id);
+    void stateChanged(Shared::Availability state);
+    void onSquawkClosing();
+    void onSquawkDestroyed();
+
+private:
+    void createMainWindow();
+    void subscribeConversation(Conversation* conv);
+    void checkForTheLastWindow();
+
+private:
+    typedef std::map<Models::Roster::ElId, Conversation*> Conversations;
+
+    Shared::Availability availability;
+    Core::Squawk* core;
+    Squawk* squawk;
+    QDBusInterface notifications;
+    Models::Roster roster;
+    Conversations conversations;
+    DialogQueue dialogueQueue;
+    bool nowQuitting;
+    bool destroyingSquawk;
+};
+
+#endif // APPLICATION_H