refactor: Move period usage of CThreadedReader in subclass

src/core/threadedreaderperiodic.cpp

@@ -0,0 +1,43 @@
+// SPDX-FileCopyrightText: Copyright (C) 2025 swift Project Community / Contributors
+// SPDX-License-Identifier: GPL-3.0-or-later OR LicenseRef-swift-pilot-client-1
+
+#include "core/threadedreaderperiodic.h"
+
+namespace swift::core
+{
+    CThreadedReaderPeriodic::CThreadedReaderPeriodic(QObject *owner, const QString &name) : CThreadedReader(owner, name)
+    {
+        connect(&m_updateTimer, &QTimer::timeout, this, &CThreadedReaderPeriodic::doWork);
+        m_updateTimer.setSingleShot(true);
+    }
+
+    void CThreadedReaderPeriodic::startReader()
+    {
+        Q_ASSERT(m_initialTime > 0);
+        QTimer::singleShot(m_initialTime, this, [=] { this->doWork(); });
+    }
+
+    void CThreadedReaderPeriodic::setInitialAndPeriodicTime(int initialTime, int periodicTime)
+    {
+        m_initialTime = initialTime;
+        m_periodicTime = periodicTime;
+
+        // if timer is active start with delta time
+        // remark: will be reset in doWork
+        if (m_updateTimer.isActive())
+        {
+            const int oldPeriodicTime = m_updateTimer.interval();
+            const int delta = m_periodicTime - oldPeriodicTime + m_updateTimer.remainingTime();
+            m_updateTimer.start(qMax(delta, 0));
+        }
+    }
+
+    void CThreadedReaderPeriodic::doWork()
+    {
+        if (!doWorkCheck()) { return; }
+        this->doWorkImpl();
+        Q_ASSERT(m_periodicTime > 0);
+        m_updateTimer.start(m_periodicTime); // restart
+    }
+
+} // namespace swift::core