Ref T301, core ping fix https://swift-project.slack.com/archives/G7GD2UP9C/p1534677752000100

Identifier list was filled and more and more identifiers got checked via DBus

- identifier set if only one unique identifer is needed
- using set avoids duplicates and fixes the bug
- restart time if registered, no need to check again

src/blackmisc/identifierlist.h

@@ -54,7 +54,7 @@ namespace BlackMisc
 } //namespace
 
 Q_DECLARE_METATYPE(BlackMisc::CIdentifierList)
-Q_DECLARE_METATYPE(BlackMisc::CCollection<BlackMisc::CIdentifier>)
 Q_DECLARE_METATYPE(BlackMisc::CSequence<BlackMisc::CIdentifier>)
+// in set: Q_DECLARE_METATYPE(BlackMisc::CCollection<BlackMisc::CIdentifier>)
 
 #endif //guard

src/blackmisc/identifierset.cpp

@@ -0,0 +1,50 @@
+/* Copyright (C) 2018
+ * swift project Community / Contributors
+ *
+ * This file is part of swift project. It is subject to the license terms in the LICENSE file found in the top-level
+ * directory of this distribution and at http://www.swift-project.org/license.html. No part of swift project,
+ * including this file, may be copied, modified, propagated, or distributed except according to the terms
+ * contained in the LICENSE file.
+ */
+
+#include "blackmisc/identifierset.h"
+
+#include <QString>
+#include <tuple>
+
+namespace BlackMisc
+{
+    CIdentifierSet::CIdentifierSet() { }
+
+    CIdentifierSet::CIdentifierSet(const CCollection<CIdentifier> &other) : CCollection<CIdentifier>(other)
+    {
+        // void
+    }
+
+    bool CIdentifierSet::containsAnyNotIn(const CIdentifierSet &other) const
+    {
+        return containsBy([&other](const CIdentifier & id) { return ! other.contains(id); });
+    }
+
+    CIdentifierSet CIdentifierSet::getMachinesUnique() const
+    {
+        CIdentifierSet il;
+        for (const CIdentifier &identifier : *this)
+        {
+            const bool contained = il.containsBy([ = ](const CIdentifier & ident)
+            {
+                return identifier.hasSameMachineName(ident);
+            });
+            if (!contained) { il.push_back(identifier); }
+        }
+        return il;
+    }
+
+    QStringList CIdentifierSet::getMachineNames(bool unique, bool sort) const
+    {
+        QStringList codes = this->transform(Predicates::MemberTransform(&CIdentifier::getMachineName));
+        if (sort) { codes.sort(); }
+        if (unique) { codes.removeDuplicates(); }
+        return codes;
+    }
+} // namespace

src/blackmisc/identifierset.h

@@ -0,0 +1,52 @@
+/* Copyright (C) 2018
+ * swift project Community / Contributors
+ *
+ * This file is part of swift project. It is subject to the license terms in the LICENSE file found in the top-level
+ * directory of this distribution and at http://www.swift-project.org/license.html. No part of swift project,
+ * including this file, may be copied, modified, propagated, or distributed except according to the terms
+ * contained in the LICENSE file.
+ */
+
+//! \file
+
+#ifndef BLACKMISC_IDENTIFIERSET_H
+#define BLACKMISC_IDENTIFIERSET_H
+
+#include "blackmisc/identifier.h"
+#include "blackmisc/collection.h"
+#include "blackmisc/variant.h"
+#include "blackmisc/blackmiscexport.h"
+#include <QMetaType>
+
+namespace BlackMisc
+{
+    /*!
+     * Value object encapsulating a set of object identifiers
+     */
+    class BLACKMISC_EXPORT CIdentifierSet : public CCollection<CIdentifier>
+    {
+    public:
+        //! Default constructor.
+        CIdentifierSet();
+
+        //! Construct from a base class object.
+        CIdentifierSet(const CCollection<CIdentifier> &other);
+
+        //! This list contains an identifier which is not contained in other.
+        bool containsAnyNotIn(const CIdentifierSet &other) const;
+
+        //! Get a list of identifiers reduced to maximum one per machine.
+        //! If there is more than one per machine, it is undefined which one will be added.
+        CIdentifierSet getMachinesUnique() const;
+
+        //! Get machine names
+        QStringList getMachineNames(bool unique = true, bool sort = true) const;
+    };
+} //namespace
+
+Q_DECLARE_METATYPE(BlackMisc::CIdentifierSet)
+Q_DECLARE_METATYPE(BlackMisc::CCollection<BlackMisc::CIdentifier>)
+// in list: Q_DECLARE_METATYPE(BlackMisc::CSequence<BlackMisc::CIdentifier>)
+
+
+#endif //guard