some new shared classes, little reorganization, preparation to cache client info

core/components/clientcache.h

@@ -0,0 +1,56 @@
+// 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 CORE_CLIENTCACHE_H
+#define CORE_CLIENTCACHE_H
+
+#include <map>
+#include <set>
+
+#include <QObject>
+#include <QString>
+
+#include <core/storage/cache.h>
+#include <shared/clientinfo.h>
+#include <shared/identity.h>
+
+namespace Core {
+
+class ClientCache : public QObject {
+    Q_OBJECT
+public:
+    ClientCache();
+    ~ClientCache();
+
+    void open();
+    void close();
+
+signals:
+    void requestClientInfo(const QString& id);
+
+public slots:
+    bool checkClient(const QString& node, const QString& ver, const QString& hash);
+    bool registerClientInfo(const QString& sourceFullJid, const QString& id, const Shared::Identity& identity, const std::set<QString>& features);
+
+private:
+    std::map<QString, Shared::ClientInfo> requested;
+    Cache<Shared::ClientInfo> cache;
+};
+
+}
+
+
+#endif // CORE_CLIENTCACHE_H