Added common files

KomplexHubPlugin/common/paginator.h

@@ -0,0 +1,85 @@
+#ifndef PAGINATOR_H
+#define PAGINATOR_H
+
+#include <QObject>
+
+#include "komplex_global.h"
+#include "slidingcachecontroller.h"
+
+template<typename T>
+class KOMPLEX_EXPORT Paginator
+{
+public:
+    Paginator() = default;
+    ~Paginator() = default;
+
+    auto next() const -> void
+    {
+        setOffset(m_offset + m_resultsPerPage);
+    }
+
+    auto previous() const -> void
+    {
+        setOffset(m_offset - m_resultsPerPage);
+    }
+
+    auto resultsPerPage() const -> qsizetype
+    {
+        return m_resultsPerPage;
+    }
+
+    auto setResultsPerPage(qsizetype resultsPerPage) -> void
+    {
+        m_resultsPerPage = resultsPerPage;
+        m_data = m_cacheController.chunk(m_offset, m_resultsPerPage);
+    }
+
+    auto data() const -> QList<T*>
+    {
+        return m_data;
+    }
+
+    auto count() const -> qsizetype
+    {
+        return m_data.count();
+    }
+
+    auto at(qsizetype index) const -> T*
+    {
+        if(index < 0 || index >= m_data.count())
+        {
+            return nullptr;
+        }
+
+        return m_data.at(index);
+    }
+
+    auto controller() -> SlidingCacheController<T>*
+    {
+        return &m_cacheController;
+    }
+
+    auto offset() const -> qsizetype
+    {
+        return m_offset;
+    }
+
+    auto setOffset(qsizetype offset) -> void
+    {
+        m_offset = offset;
+
+        if(m_offset < 0 || m_offset == std::numeric_limits<qsizetype>::max())
+            m_offset = 0;
+
+        m_data = m_cacheController.chunk(m_offset, m_resultsPerPage);
+    }
+
+private:
+    qsizetype m_offset = 0;
+    qsizetype m_resultsPerPage = 0;
+
+    SlidingCacheController<T> m_cacheController;
+    QList<T*> m_data;
+};
+
+#endif // PAGINATOR_H