Merge from kleipeda-experimental-snapshot-2024-09-27:

started new implementation of tariff-calculator.

\

@@ -0,0 +1 @@
+                                return std::make_pair(CalcState(CalcState::State::OVERPAID), dt);

library/src/calculate_price.cpp.stashed

@@ -0,0 +1,762 @@
+#include "calculate_price.h"
+#include "configuration.h"
+#include "calculator_functions.h"
+#include "payment_option.h"
+#include "utilities.h"
+
+#include <QFile>
+#include <QFileInfo>
+#include <QDateTime>
+#include <QDebug>
+#include <QList>
+
+QString const CalcState::SUCCESS = "SUCCESS";
+QString const CalcState::ERROR_PARSING_ZONE_NR = "ERROR_PARSING_ZONE_NR";
+QString const CalcState::ERROR_LOADING_TARIFF = "ERROR_LOADING_TARIFF";
+QString const CalcState::ERROR_PARSING_TARIFF = "ERROR_PARSING_TARIFF";
+QString const CalcState::NEGATIVE_PARKING_TIME = "NEGATIVE_PARKING_TIME";
+QString const CalcState::INVALID_START_DATE = "INVALID_START_DATE";
+QString const CalcState::WRONG_PARAM_VALUES = "WRONG_PARAM_VALUES";
+QString const CalcState::WRONG_ISO_TIME_FORMAT = "WRONG_ISO_TIME_FORMAT";
+QString const CalcState::ABOVE_MAX_PARKING_TIME = "ABOVE_MAX_PARKING_TIME";
+QString const CalcState::BELOW_MIN_PARKING_TIME = "BELOW_MIN_PARKING_TIME";
+QString const CalcState::BELOW_MIN_PARKING_PRICE = "BELOW_MIN_PARKING_PRICE";
+QString const CalcState::ABOVE_MAX_PARKING_PRICE = "ABOVE_MAX_PARKING_PRICE";
+QString const CalcState::OVERPAID = "OVERPAID";
+QString const CalcState::OUTSIDE_ALLOWED_PARKING_TIME = "OUTSIDE_ALLOWED_PARKING_TIME";
+
+QList<int> CALCULATE_LIBRARY_API get_time_steps(Configuration *cfg) {
+    return Calculator::GetInstance().GetTimeSteps(cfg);
+}
+
+int CALCULATE_LIBRARY_API get_minimal_parkingtime(Configuration const *cfg,
+                                                  PERMIT_TYPE permitType,
+                                                  int paymentOptionIndex) {
+    int minTime = 0;
+
+    switch(permitType) {
+    case PERMIT_TYPE::SHORT_TERM_PARKING: { // e.g. szeged (customer_281)
+        QList<int> const tsteps = Calculator::GetInstance().GetTimeSteps((Configuration *)cfg, paymentOptionIndex);
+        Q_UNUSED(tsteps);
+        minTime = cfg->getPaymentOptions(paymentOptionIndex).pop_min_time;
+    } break;
+    case PERMIT_TYPE::DAY_TICKET_ADULT: {
+    } break;
+    case PERMIT_TYPE::DAY_TICKET_TEEN: {
+    } break;
+    case PERMIT_TYPE::DAY_TICKET_CHILD: {
+    } break;
+    default:
+        // for each new sell-procedure, recomute the timesteps. implicitly, set
+        // the minimal parking time.
+        Calculator::GetInstance().ResetTimeSteps(paymentOptionIndex);
+        Calculator::GetInstance().GetTimeSteps((Configuration *)cfg, paymentOptionIndex);
+        minTime = qRound(cfg->getPaymentOptions(paymentOptionIndex).pop_min_time);
+    }
+
+    return minTime;
+}
+
+int CALCULATE_LIBRARY_API get_maximal_parkingtime(Configuration const *cfg,
+                                                  PERMIT_TYPE permitType,
+                                                  int paymentOptionIndex) {
+    int maxTime = 0;
+
+    switch(permitType) {
+    case PERMIT_TYPE::SHORT_TERM_PARKING: { // e.g. szeged (customer_281)
+        maxTime = cfg->getPaymentOptions(paymentOptionIndex).pop_max_time;
+    } break;
+    case PERMIT_TYPE::DAY_TICKET_ADULT: {
+    } break;
+    case PERMIT_TYPE::DAY_TICKET_TEEN: {
+    } break;
+    case PERMIT_TYPE::DAY_TICKET_CHILD: {
+    } break;
+    default: ;
+    }
+
+    return maxTime;
+
+}
+
+int CALCULATE_LIBRARY_API get_minimal_parkingprice(Configuration *cfg,
+                                                   PERMIT_TYPE permitType,
+                                                   int paymentOptionIndex,
+                                                   QDateTime const &start) {
+    int minPrice = -1;
+
+    switch(permitType) {
+    case PERMIT_TYPE::SHORT_TERM_PARKING: { // e.g. szeged (customer_281)
+        minPrice = cfg->getPaymentOptions(paymentOptionIndex).pop_min_price;
+    } break;
+    case PERMIT_TYPE::DAY_TICKET_ADULT: {
+    } break;
+    case PERMIT_TYPE::DAY_TICKET_TEEN: {
+    } break;
+    case PERMIT_TYPE::DAY_TICKET_CHILD: {
+    } break;
+    case PERMIT_TYPE::DAY_TICKET: {
+        minPrice = compute_product_price(cfg, permitType, start);
+    } break;
+    default: ;
+    }
+
+    return minPrice;
+}
+
+int CALCULATE_LIBRARY_API compute_product_price(Configuration const *cfg,
+                                                PERMIT_TYPE permitType,
+                                                QDateTime const &start,
+                                                QDateTime *productStart,
+                                                QDateTime *productEnd) {
+
+    switch(permitType) {
+    case PERMIT_TYPE::SHORT_TERM_PARKING: { // e.g. szeged (customer_281)
+    } break;
+    case PERMIT_TYPE::DAY_TICKET_CHILD:
+        // [[fallthrough]];
+    case PERMIT_TYPE::DAY_TICKET_TEEN:
+        // [[fallthrough]];
+    case PERMIT_TYPE::FOOD_STAMP:
+        // [[fallthrough]];
+    case PERMIT_TYPE::DAY_TICKET_ADULT: {
+        std::optional<QVector<ATBTariffProduct>> products = cfg->getTariffProductForProductId(permitType);
+        if (products) {
+            QVector<ATBTariffProduct> product = products.value();
+            if (product.size() > 0) {
+                ATBTariffProduct const &p = product[0];
+                return p.m_tariff_product_price;
+#if 0
+                // in case we do not have prepaid-option
+                QTime const &currentTime = QDateTime::currentDateTime().time();
+
+                if (p.m_tariff_product_start <= currentTime && currentTime <= p.m_tariff_product_end) {
+                    return p.m_tariff_product_price;
+                } else {
+                    qCritical() << "(" << __func__ << ":" << __LINE__ << ")"
+                                << "ERROR currentTime"
+                                << currentTime.toString(Qt::ISODate)
+                                << "INVALID ("
+                                << p.m_tariff_product_start.toString(Qt::ISODate)
+                                << p.m_tariff_product_end.toString(Qt::ISODate) << ")";
+                }
+#endif
+            }
+        }
+    } break;
+    case PERMIT_TYPE::INVALID:
+        // [[fallthrough]];
+    case PERMIT_TYPE::DAY_TICKET: {
+        std::optional<QVector<ATBTariffProduct>> products = cfg->getTariffProductForProductId(permitType);
+        if (products) {
+            QVector<ATBTariffProduct> product = products.value();
+            int product_price = 0;
+
+            if (productStart && productEnd) {
+                *productStart = start;
+                *productEnd = start;
+                if (product.size() > 0) {
+                    productStart->setTime(product[0].getTimeStart());
+                    productEnd->setTime(product[0].getTimeEnd());
+                }
+            }
+
+            for (QVector<ATBTariffProduct>::size_type i=0; i<product.size(); ++i) {
+                ATBTariffProduct const &p = product[i];
+                QTime const &startTime = p.getTimeStart();
+                QTime const &endTime = p.getTimeEnd();
+
+                // qCritical() << __LINE__ << startTime.toString(Qt::ISODate);
+                // qCritical() << __LINE__ << endTime.toString(Qt::ISODate);
+                // qCritical() << __LINE__ << start.toString(Qt::ISODate);
+
+                if (start.time() >= startTime && start.time() < endTime) {
+                    product_price = p.getProductPrice();
+                    if (productStart && productEnd) {
+                        productStart->setTime(startTime);
+                        productEnd->setTime(endTime);
+                    }
+                }
+            }
+
+            return product_price;
+        } else {
+            // SZEGED
+            int const pop_daily_card_price = cfg->getPaymentOptions().pop_daily_card_price;
+
+            qDebug() << QString("(%1:%2) no products defined in tariff-file").arg(__func__).arg(__LINE__);
+            qDebug() << QString("(%1:%2) pop_daily_card_price=%3").arg(__func__).arg(__LINE__).arg(pop_daily_card_price);
+
+            // static const PaymentMethod paymentMethodId = Utilities::getPaymentMethodId(cfg);
+            // return Utilities::getDailyTicketCardPrice(cfg, paymentMethodId);
+
+            return pop_daily_card_price;
+        }
+    } break;
+    case PERMIT_TYPE::TWENTY_FOUR_HOURS_TICKET: {
+        std::optional<QVector<ATBTariffProduct>> products = cfg->getTariffProductForProductId(permitType);
+        if (products) {
+            int product_price = 0;
+            QVector<ATBTariffProduct> product = products.value();
+
+            if (product.size() > 0) {
+                if (productStart && productEnd) {
+                    int pop_min_time = get_minimal_parkingtime(cfg); // in minutes
+                    int pop_max_time = get_maximal_parkingtime(cfg); // in minutes
+                    if (pop_max_time >= pop_min_time) {
+                        *productStart = start;
+                        *productEnd = start.addSecs(pop_max_time*60);
+                        product_price = product[0].getProductPrice();
+                    }
+                }
+            }
+
+            return product_price;
+        }
+
+    } break;
+    default:
+      break;
+    }
+
+    return 0;
+}
+
+int CALCULATE_LIBRARY_API get_maximal_parkingprice(Configuration *cfg,
+                                                   PERMIT_TYPE permitType,
+                                                   int paymentOptionIndex) {
+    int maxPrice = -1;
+    static const PaymentMethod paymentMethodId = Utilities::getPaymentMethodId(cfg);
+
+    switch(permitType) {
+    case PERMIT_TYPE::SHORT_TERM_PARKING: { // e.g. szeged (customer_281)
+        if (paymentMethodId == PaymentMethod::Progressive || paymentMethodId == PaymentMethod::Steps) {
+            maxPrice = Utilities::getMaximalParkingPrice(cfg, paymentMethodId);
+        } else { // PaymentMethod::Linear -> e.g. szeged
+            int const key = cfg->getPaymentOptions(paymentOptionIndex).pop_id;
+            int const maxTime = cfg->getPaymentOptions(paymentOptionIndex).pop_max_time; // maxTime is given in minutes
+            std::optional<QVector<ATBPaymentRate>> const &pv = cfg->getPaymentRateForKey(key);
+            if (pv) {
+                QVector<ATBPaymentRate> const &paymentRate = pv.value();
+                if (paymentRate.size() > 0) {
+                    int const price = paymentRate.last().pra_price; // price is given per hour
+                    maxPrice = qRound((maxTime * price) / 60.0f);
+                }
+            }
+        }
+    } break;
+    case PERMIT_TYPE::DAY_TICKET_ADULT:
+        break;
+    case PERMIT_TYPE::DAY_TICKET_TEEN:
+        break;
+    case PERMIT_TYPE::DAY_TICKET_CHILD:
+        break;
+    default: ;
+    }
+
+    return maxPrice;
+}
+
+int CALCULATE_LIBRARY_API get_zone_nr(int zone)
+{
+    if(zone > -1) return zone;
+    else
+    {
+        QFile zone("/etc/zone_nr");
+        if (zone.exists()) {
+            QFileInfo finfo(zone);
+            if (finfo.size() <= 4) { // decimal 000\n
+                if (zone.open(QIODevice::ReadOnly | QIODevice::Text)) {
+                    QTextStream in(&zone);
+                    return in.readLine(100).toInt();
+                }
+            }
+        }
+        return -1;
+    }
+}
+
+CalcState CALCULATE_LIBRARY_API init_tariff(parking_tariff_t **tariff, char const *config_file) {
+    *tariff = new Configuration();
+
+    CalcState calcState;
+#if __linux__
+
+    int const zone = get_zone_nr();
+
+    // DEBUG
+    qCritical() << "init_tariff:";
+    qCritical() << "      ... zone = " << zone;
+
+    if (zone <= 0) {
+        delete *tariff;
+        *tariff = nullptr;
+        return calcState.set(CalcState::State::ERROR_PARSING_ZONE_NR);
+    }
+
+    QString confFile(config_file);
+    if (!confFile.endsWith(QChar('/'))) {
+        confFile += "/";
+    }
+
+    char buffer[32];
+    memset(buffer, 0x00, sizeof(buffer));
+    snprintf(buffer, sizeof(buffer)-1, "tariff%02d.json", zone);
+    confFile += buffer;
+#else // windows
+    QString confFile(config_file);
+#endif
+
+    // DEBUG
+    qCritical() << "      ... confFile = " << confFile;
+
+    QFile fname(confFile);
+    if (fname.exists() &&
+            fname.open(QIODevice::ReadOnly | QIODevice::Text)) {
+        // DEBUG
+        qCritical() << "      ... confFile is open";
+
+        QString json = fname.readAll();
+        if (! (*tariff)->ParseJson(*tariff, json.toStdString().c_str())) {
+            delete *tariff;
+            *tariff = nullptr;
+            return calcState.set(CalcState::State::ERROR_PARSING_TARIFF);
+        }
+    } else {
+        delete *tariff;
+        *tariff = nullptr;
+        return calcState.set(CalcState::State::ERROR_LOADING_TARIFF);
+    }
+
+    qCritical() << "init_tariff: Parsing tariff config (" << confFile << ")";
+
+    return calcState;
+}
+
+void CALCULATE_LIBRARY_API free_tariff(parking_tariff_t *tariff) {
+    if (tariff != nullptr) {
+        delete tariff;
+    }
+}
+
+//
+// UpDown 1 -> up; 0 -> down
+int CALCULATE_LIBRARY_API compute_next_timestep(parking_tariff_t *tariff, int currentTimeMinutes, int UpDown)
+{
+    qCritical() << "   compute_next_timestep()     currentTimeMinutes: " << currentTimeMinutes;
+    qCritical() << "   compute_next_timestep() up/down (1=up, 0=down): " << UpDown;
+
+    Configuration const *cfg = tariff;
+
+    // compute payment method id (e.g. Linear=3, Steps=4)
+    PaymentMethod const paymentMethodId = Utilities::getPaymentMethodId(cfg);
+    switch (paymentMethodId) {
+    case PaymentMethod::Progressive:
+        qCritical() << "   compute_next_timestep()     paymentMethodId: Progressive";
+        break;
+    case PaymentMethod::Degressive:
+        qCritical() << "   compute_next_timestep()     paymentMethodId: Degressive";
+        break;
+    case PaymentMethod::Linear:
+        qCritical() << "   compute_next_timestep()     paymentMethodId: Linear";
+        break;
+    case PaymentMethod::Steps:
+        qCritical() << "   compute_next_timestep()     paymentMethodId: Steps";
+        break;
+    case PaymentMethod::Undefined:
+        qCritical() << "   compute_next_timestep()     paymentMethodId: Undefined";
+        break;
+    }
+
+    // use tariff with structure as for instance Schnau, Koenigsee:
+    // without given YearPeriod, SpecialDays and SpecialDaysWorktime
+    if ((paymentMethodId == PaymentMethod::Steps) ||
+        // progressive tariff: e.g. Neuhauser, Kirchdorf (743)
+        (paymentMethodId == PaymentMethod::Progressive))
+    {
+        const QList<int> stepList = Calculator::GetInstance().GetTimeSteps(tariff);
+        qCritical() << "   compute_next_timestep()     timeSteps:" << stepList;
+
+        int currentStepIndex = stepList.indexOf(currentTimeMinutes);
+
+        if (currentStepIndex == -1) {
+            qCritical() << "compute_next_timestep() *NO STEP* for currentTimeMinutes (" << currentTimeMinutes << ")";
+            return  currentTimeMinutes;
+        }
+
+        if (UpDown == 1) { // UP
+            if (stepList[currentStepIndex] == stepList.last()) {
+                qCritical() << "compute_next_timestep() *NO NEXT STEP* for currentTimeMinutes (" << currentTimeMinutes << ")";
+                return  currentTimeMinutes;
+            }
+            else {
+                return stepList[currentStepIndex + 1];
+            }
+        }
+        if (UpDown == 0) { // DOWN
+            if (stepList[currentStepIndex] == stepList.first()) {
+                qCritical() << "compute_next_timestep() *NO PREVIOUS STEP* for currentTimeMinutes (" << currentTimeMinutes << ")";
+                return  currentTimeMinutes;
+            }
+            else {
+                return stepList[currentStepIndex - 1];
+            }
+        }
+    } else
+    if (paymentMethodId == PaymentMethod::Linear) {
+
+        // currentTimeMinutes is the number of minutes actually used. This
+        // value is an offset from the start time and cannot be used as a
+        // QDateTime.
+
+        qCritical() << "compute_next_timestep() up/down (1=up, 0=down):" << UpDown;
+
+        // get minimal and maximal parking times
+        int const minParkingTime = Utilities::getMinimalParkingTime(cfg, paymentMethodId);
+        int const maxParkingTime = Utilities::getMaximalParkingTime(cfg, paymentMethodId);
+
+        qCritical() << "        compute_next_timestep() maxParkingTime:" << maxParkingTime;
+        qCritical() << "        compute_next_timestep() minParkingTime:" << minParkingTime;
+
+        // use the first (i.e. main duration step contained in the tariff json-file)
+        int firstDurationStep = Utilities::getFirstDurationStep(cfg, paymentMethodId);
+        firstDurationStep = ((UpDown == 1) ? firstDurationStep : -firstDurationStep);
+
+        qCritical() << "     compute_next_timestep() firstDurationStep:" << firstDurationStep;
+
+        int const nextTimeStep = currentTimeMinutes + firstDurationStep;
+
+        if (nextTimeStep >= minParkingTime && nextTimeStep <= maxParkingTime) {
+            qCritical() << "          compute_next_timestep() nextTimeStep:" << nextTimeStep;
+            return nextTimeStep;
+        }
+    }
+
+    qCritical() << "compute_next_timestep() *CAN NOT COMPUTE* for currentTimeMinutes (" << currentTimeMinutes << ")";
+    return  currentTimeMinutes;
+}
+
+// this is currently not used
+CalcState CALCULATE_LIBRARY_API compute_price_for_parking_ticket(
+        parking_tariff_t *tariff,
+        time_t start_parking_time, // in minutes
+        time_t end_parking_time,   // netto time in minutes
+        struct price_t *price) {
+    CalcState calcState;
+    double minMin = tariff->PaymentOption.find(tariff->getPaymentOptions().pop_payment_method_id)->second.pop_min_time;
+    double maxMin = tariff->PaymentOption.find(tariff->getPaymentOptions().pop_payment_method_id)->second.pop_max_time;
+
+    if (minMin < 0 || maxMin < 0 || maxMin < minMin) {
+        calcState.setDesc(QString("minMin=%1, maxMin=%2").arg(minMin).arg(maxMin));
+        return calcState.set(CalcState::State::WRONG_PARAM_VALUES);
+    }
+
+    int const duration = end_parking_time - start_parking_time;
+    if (duration < 0) {
+        calcState.setDesc(QString("end=%1, start=%2")
+                          .arg(end_parking_time, start_parking_time));
+        return calcState.set(CalcState::State::NEGATIVE_PARKING_TIME);
+    }
+    if (duration > maxMin) {
+        calcState.setDesc(QString("duration=%1, maxMin=%2").arg(duration).arg(maxMin));
+        return calcState.set(CalcState::State::ABOVE_MAX_PARKING_TIME);
+    }
+    if (duration < minMin) {
+        calcState.setDesc(QString("duration=%1, minMin=%2").arg(duration).arg(minMin));
+        return calcState.set(CalcState::State::BELOW_MIN_PARKING_TIME);
+    }
+    if (duration == 0) {
+        return calcState.set(CalcState::State::SUCCESS);
+    }
+
+    QDate const d(1970, 1, 1);
+    QTime const t(0, 0, 0);
+    QDateTime start(d, t, Qt::UTC);
+    start = start.toLocalTime().addSecs(start_parking_time * 60);
+    QDateTime end(start);
+    if (start.isValid()) {
+        double cost = Calculator::GetInstance().GetCostFromDuration(
+                    tariff,
+                    tariff->getPaymentOptions().pop_payment_method_id,
+                    start,
+                    end,
+                    duration, false, true);
+        double minCost = tariff->PaymentOption.find(tariff->getPaymentOptions().pop_payment_method_id)->second.pop_min_price;
+        if (cost < minCost) {
+            calcState.setDesc(QString("minCost=%1, cost=%2").arg(minCost).arg(cost));
+            return calcState.set(CalcState::State::BELOW_MIN_PARKING_PRICE);
+        }
+        price->units = cost;
+        price->netto = cost;
+    } else {
+        return calcState.set(CalcState::State::INVALID_START_DATE);
+    }
+
+    return calcState.set(CalcState::State::SUCCESS);
+}
+
+CalcState CALCULATE_LIBRARY_API compute_price_for_parking_ticket(
+        parking_tariff_t *tariff,
+        QDateTime &start_parking_time,
+        int netto_parking_time,
+        QDateTime &end_parking_time,
+        struct price_t *price,
+        bool prepaid)
+{
+    CalcState calcState;
+
+    int paymentOptionIndex = tariff->getPaymentOptionIndex(start_parking_time);
+
+    double minMin = tariff->getPaymentOptions(paymentOptionIndex).pop_min_time;
+    double maxMin = tariff->getPaymentOptions(paymentOptionIndex).pop_max_time;
+
+    // DEBUG
+    qCritical() << "compute_price_for_parking_ticket() " << endl
+                << "          paymentOptionIndex: " << paymentOptionIndex << endl
+                << "          start_parking_time: " << start_parking_time << endl
+                << "          netto_parking_time: " << netto_parking_time << endl
+                << "                      minMin: " << minMin << endl
+                << "                      maxMin: " << maxMin;
+
+
+    if (netto_parking_time < 0) {
+        calcState.setDesc(QString("end=%1, start=%2")
+                          .arg(end_parking_time.toString(Qt::ISODate),
+                               start_parking_time.toString(Qt::ISODate)));
+        return calcState.set(CalcState::State::NEGATIVE_PARKING_TIME);
+    }
+    if (netto_parking_time > maxMin) {
+        calcState.setDesc(QString("duration=%1, maxMin=%2").arg(netto_parking_time).arg(maxMin));
+        return calcState.set(CalcState::State::ABOVE_MAX_PARKING_TIME);
+    }
+    if (netto_parking_time < minMin) {
+        calcState.setDesc(QString("duration=%1, minMin=%2").arg(netto_parking_time).arg(minMin));
+        return calcState.set(CalcState::State::BELOW_MIN_PARKING_TIME);
+    }
+    if (netto_parking_time == 0) {
+        return calcState.set(CalcState::State::SUCCESS);
+    }
+
+    double cost = -1;
+    if (start_parking_time.isValid()) {
+        if (tariff->getPaymentOptions(paymentOptionIndex).pop_payment_method_id == PaymentMethod::Steps) {
+            // hier muesste man unterscheiden: uebertrag oder nicht?
+            calcState = Calculator::GetInstance().isParkingAllowed(tariff, start_parking_time,
+                                                                   netto_parking_time, paymentOptionIndex);
+            if (calcState.getStatus() == CalcState::State::OUTSIDE_ALLOWED_PARKING_TIME) {
+                // qCritical() << "(" << __func__ << ":" << __LINE__ << ")"
+                //             << calcState.toString();
+                return calcState;
+            }
+            cost = Calculator::GetInstance().GetCostFromDuration(tariff, start_parking_time, netto_parking_time, paymentOptionIndex);
+            end_parking_time = start_parking_time.addSecs(netto_parking_time*60);
+
+            // qCritical() << "(" << __func__ << ":" << __LINE__ << ")"
+            //             << "end_parking_time" << end_parking_time.toString(Qt::ISODate);
+
+        } else {
+            cost = Calculator::GetInstance().GetCostFromDuration(
+                        tariff,
+                        tariff->getPaymentOptions().pop_payment_method_id,
+                        start_parking_time,         // starting time
+                        end_parking_time,           // return value: end time
+                        netto_parking_time,         // minutes, netto
+                        false, prepaid);
+        }
+        double minCost = tariff->getPaymentOptions(paymentOptionIndex).pop_min_price;
+        if (cost < minCost) {
+            calcState.setDesc(QString("minCost=%1, cost=%2").arg(minCost, cost));
+            return calcState.set(CalcState::State::BELOW_MIN_PARKING_PRICE);
+        }
+
+        // DEBUG
+        qCritical() << "            end_parking_time: " << end_parking_time;
+        qCritical() << "  -> calculated cost (netto): " << cost;
+
+        price->brutto = price->vat = price->vat_percentage = 0;
+        price->units = cost;
+        price->netto = cost;
+
+    } else {
+        return calcState.set(CalcState::State::INVALID_START_DATE);
+    }
+
+    return calcState.set(CalcState::State::SUCCESS);
+}
+
+CalcState CALCULATE_LIBRARY_API compute_duration_for_parking_ticket(
+        parking_tariff_t *tariff,
+        time_t start_parking_time,
+        double price,
+        QString &duration) {
+    CalcState calcState;
+    QDate const d(1970, 1, 1);
+    QTime const t(0, 0, 0);
+    QDateTime start(d, t, Qt::UTC);
+    start = start.toLocalTime().addSecs(start_parking_time * 60);
+    if (start.isValid()) {
+        QString cs = start.toString(Qt::ISODate);
+
+        // DEBUG
+        qCritical() << "compute_duration_for_parking_ticket(): ";
+        qCritical() << "      start (cs): " << cs;
+        qCritical() << "           price: " << price;
+
+        duration = Calculator::GetInstance().GetDurationFromCost(tariff,
+                                                  tariff->getPaymentOptions().pop_payment_method_id,
+                                                  cs.toLocal8Bit().constData(),
+                                                  price, false, true).c_str();
+        QDateTime d = QDateTime::fromString(duration, Qt::ISODate);
+        if (!d.isValid()) {
+            calcState.setDesc(QString("ticketEndTime=%1").arg(duration));
+            return calcState.set(CalcState::State::WRONG_ISO_TIME_FORMAT);
+        }
+    } else {
+        return calcState.set(CalcState::State::INVALID_START_DATE);
+    }
+
+    return calcState.set(CalcState::State::SUCCESS);
+}
+
+CalcState CALCULATE_LIBRARY_API compute_duration_for_parking_ticket(
+        parking_tariff_t *tariff,
+        QDateTime const &start_parking_time,
+        double price,
+        QDateTime &ticketEndTime)
+{
+    CalcState calcState;
+    if (start_parking_time.isValid()) {
+        QString cs = start_parking_time.toString(Qt::ISODate);
+        QString endTime = Calculator::GetInstance().GetDurationFromCost(
+                    tariff,
+                    tariff->getPaymentOptions().pop_payment_method_id,
+                    cs.toLocal8Bit().constData(),
+                    price, false, true).c_str();
+
+        if (endTime == CalcState::SUCCESS) {
+            calcState.setDesc(QString("SUCCESS"));
+            calcState.setStatus(endTime);
+        } else
+        if (endTime == CalcState::ERROR_PARSING_ZONE_NR) {
+            calcState.setStatus(endTime);
+            return calcState;
+        } else
+        if (endTime == CalcState::ERROR_LOADING_TARIFF) {
+            calcState.setStatus(endTime);
+            return calcState;
+        } else
+        if (endTime == CalcState::ERROR_PARSING_TARIFF) {
+            calcState.setStatus(endTime);
+            return calcState;
+        } else
+        if (endTime == CalcState::NEGATIVE_PARKING_TIME) {
+            calcState.setStatus(endTime);
+            return calcState;
+        } else
+        if (endTime == CalcState::INVALID_START_DATE) {
+            calcState.setStatus(endTime);
+            return calcState;
+        } else
+        if (endTime == CalcState::WRONG_PARAM_VALUES) {
+            calcState.setStatus(endTime);
+            return calcState;
+        } else
+        if (endTime == CalcState::WRONG_ISO_TIME_FORMAT) {
+            calcState.setStatus(endTime);
+            return calcState;
+        } else
+        if (endTime == CalcState::ABOVE_MAX_PARKING_TIME) {
+            calcState.setStatus(endTime);
+            return calcState;
+        } else
+        if (endTime == CalcState::BELOW_MIN_PARKING_TIME) {
+            calcState.setStatus(endTime);
+            return calcState;
+        } else
+        if (endTime == CalcState::BELOW_MIN_PARKING_PRICE) {
+            calcState.setStatus(endTime);
+            return calcState;
+        } else
+        if (endTime == CalcState::ABOVE_MAX_PARKING_PRICE) {
+            calcState.setDesc(CalcState::ABOVE_MAX_PARKING_PRICE);
+            calcState.setStatus(CalcState::ABOVE_MAX_PARKING_PRICE);
+            return calcState;
+        } else
+        if (endTime == CalcState::OVERPAID) {
+            calcState.setDesc(CalcState::OVERPAID);
+            calcState.setStatus(CalcState::OVERPAID);
+            return calcState;
+        } else
+        if (endTime == CalcState::OUTSIDE_ALLOWED_PARKING_TIME) {
+            calcState.setStatus(endTime);
+            return calcState;
+        } else {
+            ticketEndTime = QDateTime::fromString(endTime,Qt::ISODate);
+
+            // DEBUG
+            //qCritical() << "compute_duration_for_parking_ticket(): ";
+            //qCritical() << "                 endTime: " << endTime;
+            //qCritical() << "           ticketEndTime: " << ticketEndTime;
+
+            if (!ticketEndTime.isValid()) {
+                calcState.setDesc(QString("ticketEndTime=%1").arg(endTime));
+                return calcState.set(CalcState::State::WRONG_ISO_TIME_FORMAT);
+            }
+        }
+    } else {
+        return calcState.set(CalcState::State::INVALID_START_DATE);
+    }
+
+    return calcState.set(CalcState::State::SUCCESS);
+}
+
+CalcState CALCULATE_LIBRARY_API compute_duration_for_daily_ticket(parking_tariff_t *tariff, QDateTime const &start_parking_time, QDateTime &ticketEndTime)
+{
+    CalcState calcState;
+    if (start_parking_time.isValid()) {
+
+        ticketEndTime = Calculator::GetInstance().GetDailyTicketDuration(tariff,
+                                                            start_parking_time,
+                                                            tariff->getPaymentOptions().pop_payment_method_id,
+                                                            false);    // carry over
+
+        // DEBUG
+        qCritical() << "compute_duration_for_daily_ticket(): ";
+        qCritical() << "           ticketEndTime: " << ticketEndTime;
+
+        if (!ticketEndTime.isValid()) {
+            calcState.setDesc(QString("ticketEndTime=%1").arg(ticketEndTime.toString(Qt::ISODate)));
+            return calcState.set(CalcState::State::WRONG_ISO_TIME_FORMAT);
+        }
+
+    } else {
+        return calcState.set(CalcState::State::INVALID_START_DATE);
+    }
+
+    return calcState.set(CalcState::State::SUCCESS);
+}
+
+
+CalcState CALCULATE_LIBRARY_API compute_price_for_daily_ticket(
+                                    parking_tariff_t *tariff,
+                                    QDateTime const &startDatetime,
+                                    QDateTime &endDatetime,
+                                    PERMIT_TYPE permitType,
+                                    struct price_t *price) {// return value
+    CalcState calcState;
+
+
+    if (startDatetime.isValid()) {
+        if (std::optional<struct price_t> p =
+            Calculator::GetInstance().GetDailyTicketPrice(tariff,
+                                                          startDatetime,
+                                                          endDatetime,
+                                                          permitType)) {
+           *price = p.value();
+        }
+    } else {
+        return calcState.set(CalcState::State::INVALID_START_DATE);
+    }
+    return calcState.set(CalcState::State::SUCCESS);
+}
+