brainstorming ...

library/include/mobilisis/tariff_comp_state.h

@@ -0,0 +1,20 @@
+#ifndef TARIFF_COMP_STATE_H_INCLUDED
+#define TARIFF_COMP_STATE_H_INCLUDED
+
+#include <QDateTime>
+
+struct TariffCompState {
+    QDateTime const m_start;
+    int m_nettoParkingTimeTotal = 0;
+    int m_bruttoParkingTimeTotal = 0;
+    int m_priceTotal = 0;
+
+    explicit TariffCompState(QDateTime start)
+        : m_start(std::move(start))
+        , m_nettoParkingTimeTotal(0)
+        , m_bruttoParkingTimeTotal(0)
+        , m_priceTotal(0) {
+    }
+};
+
+#endif // TARIFF_COMP_STATE_H_INCLUDED

library/include/mobilisis/tariff_comp_step.h

@@ -0,0 +1,29 @@
+#ifndef TARIFF_COMP_STEP_H_INCLUDED
+#define TARIFF_COMP_STEP_H_INCLUDED
+
+#include <QDateTime>
+#include "tariff_comp_state.h"
+
+class TariffCompStep {
+    int m_duration;
+    QDateTime const m_start;
+    QDateTime const m_end;
+    uint64_t const m_handle;
+    TariffCompState m_compState;
+
+    uint64_t hash();
+
+public:
+    explicit TariffCompStep(int duration, QDateTime start, QDateTime end, TariffCompState &compState)
+        : m_duration(duration)
+        , m_start(std::move(start))
+        , m_end(std::move(end))
+        , m_handle(hash())
+        , m_compState(compState) {
+    }
+
+    uint64_t handle() { return m_handle; }
+    uint64_t handle() const { return m_handle; }
+};
+
+#endif // TARIFF_COMP_STEP_H_INCLUDED

library/src/tariff_comp_step.cpp

@@ -0,0 +1,17 @@
+#include "tariff_comp_step.h"
+
+#include <QByteArray>
+#include <QCryptographicHash>
+#include <QString>
+
+uint64_t TariffCompStep::hash() {
+    QString const str(QString("%1%2%3").arg(m_duration).arg(m_start.toString(Qt::ISODate)).arg(m_end.toString(Qt::ISODate)));
+    QByteArray const hash = QCryptographicHash::hash(
+      QByteArray::fromRawData(reinterpret_cast<char const*>(str.utf16()), str.length()*2),
+      QCryptographicHash::Md5
+    );
+
+    uint64_t const &i = hash.left(8).toULongLong(nullptr, 16);
+    uint64_t const &j = hash.right(8).toULongLong(nullptr, 16);
+    return i ^ j;
+}