finally launches again, started contact abstraction in server

core/contact.h

@@ -0,0 +1,59 @@
+/*
+ * <one line to give the program's name and a brief idea of what it does.>
+ * 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 CORE_CONTACT_H
+#define CORE_CONTACT_H
+
+#include <QObject>
+#include <QSet>
+#include "archive.h"
+
+namespace Core {
+
+class Contact : public QObject
+{
+    Q_OBJECT
+public:
+    enum ArchiveState {
+        empty,              //have no messages stored for this contact
+        chunk,              //have some chunk of history, don't have the beginning nor have the end
+        beginning,          //have the history from the very beginning, don't have the end
+        end,                //have the history to the end, but don't have the beginning
+        complete            //have full history locally stored
+    };
+    Contact(const QString& pJid, const QString& account, QObject* parent = 0);
+    ~Contact();
+    
+    ArchiveState getArchiveState() const;
+    QString getName() const;
+    void setName(const QString& n);
+    QSet<QString> getGroups() const;
+    
+public:
+    const QString jid;
+
+private:
+    QString name;
+    QSet<QString> groups;
+    ArchiveState state;
+    Archive* archive;
+};
+
+}
+
+#endif // CORE_CONTACT_H