76 lines
2.8 KiB
C++
76 lines
2.8 KiB
C++
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#include "date_time_generator.h"
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DateTimeGenerator::DateTimeGenerator(const QPair<qint64, qint64> &dayRange,
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const QPair<QTime, QTime> &timeRange)
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: dayRange_(dayRange), timeRange_(timeRange) {
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auto &[lowestDate, highestDate] = dayRange_;
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if (lowestDate < 0 || highestDate < 0) {
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qFatal() << "Lowest or highest date is negative";
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}
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if (lowestDate > highestDate) {
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qCritical() << "Lowest date is greater than the highest date, values will "
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"be swapped";
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std::swap(lowestDate, highestDate);
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}
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auto &[lowestTime, highestTime] = timeRange_;
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if (!lowestTime.isValid() || !highestTime.isValid()) {
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qFatal() << "Lowest or highest time is not valid";
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}
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if (lowestTime > highestTime) {
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qCritical() << "Lowest time is greater than the highest time, values will "
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"be swapped";
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std::swap(lowestTime, highestTime);
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}
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}
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QDateTime DateTimeGenerator::generate(const QDateTime &upperBoundInclusive) {
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auto [lowestDate, highestDate] = dayRange_;
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auto [lowestTime, highestTime] = timeRange_;
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const QDate &maxDateValue = upperBoundInclusive.date();
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const qint64 maxTimeValueMs =
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upperBoundInclusive.time().msecsSinceStartOfDay();
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QDate epochDate = QDateTime::fromMSecsSinceEpoch(0).date();
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qint64 daysFromEpochDateToMaxDateValue = epochDate.daysTo(maxDateValue);
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highestDate = std::min(highestDate, daysFromEpochDateToMaxDateValue);
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qint64 minusDeltaDays = -bounded(lowestDate, highestDate);
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QDate dateSoldAt = maxDateValue.addDays(minusDeltaDays);
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qint64 lowestTimeMs = lowestTime.msecsSinceStartOfDay();
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qint64 highestTimeMs = highestTime.msecsSinceStartOfDay() + 1;
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qint64 msecsSinceStartOfDay = bounded(lowestTimeMs, highestTimeMs);
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if (msecsSinceStartOfDay > maxTimeValueMs) {
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msecsSinceStartOfDay = maxTimeValueMs;
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}
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QTime timeSoldAt = QTime::fromMSecsSinceStartOfDay(msecsSinceStartOfDay);
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return {std::move(dateSoldAt), std::move(timeSoldAt)};
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}
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QDateTime DateTimeGenerator::generate(const QDateTime &lowerBoundInclusive,
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const QDateTime &upperBoundInclusive) {
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if (lowerBoundInclusive > upperBoundInclusive) {
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qFatal() << "Lower bound date is greater than the upper bound date";
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}
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const QDate &minDateValue = lowerBoundInclusive.date();
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const QTime &minTimeValue = lowerBoundInclusive.time();
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QDateTime unboundedLower = generate(upperBoundInclusive);
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QDate boundedDate = unboundedLower.date() <= minDateValue
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? minDateValue
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: unboundedLower.date();
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QTime boundedTime = unboundedLower.time() <= minTimeValue
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? minTimeValue
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: unboundedLower.time();
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return {std::move(boundedDate), std::move(boundedTime)};
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}
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