some initial classes for keys form

ui/widgets/vcard/omemo/keysmodel.h

@@ -0,0 +1,58 @@
+// 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 UI_KEYSMODEL_H
+#define UI_KEYSMODEL_H
+
+#include <QAbstractListModel>
+
+#include <shared/keyinfo.h>
+
+namespace UI {
+
+/**
+ * @todo write docs
+ */
+class KeysModel : public QAbstractListModel
+{
+public:
+    KeysModel(QObject *parent = nullptr);
+    ~KeysModel();
+
+    void addKey(const Shared::KeyInfo& info);
+
+    QVariant data(const QModelIndex & index, int role = Qt::DisplayRole) const override;
+    int rowCount(const QModelIndex& parent = QModelIndex()) const override;
+
+    QHash<int, QByteArray> roleNames() const override;
+    QModelIndex index(int row, int column, const QModelIndex & parent) const override;
+
+    enum Roles {
+        Label = Qt::UserRole + 1,
+        FingerPrint,
+        TrustLevel
+    };
+
+private:
+    std::deque<Shared::KeyInfo*> keys;
+
+private:
+    static const QHash<int, QByteArray> roles;
+};
+
+}
+
+#endif // UI_KEYSMODEL_H