Implement decoding of validity times for IRT/NRT/RPT type FCB tickets

Those contain various optional parts and are stored differential to
the issuing time.

src/lib/era/fcbticket.cpp

@@ -418,6 +418,30 @@ void Fcb::ReservationData::decode(UPERDecoder &decoder)
     FCB_READ_CUSTOM(extension);
 }
 
+QDateTime Fcb::ReservationData::departureDateTime(const QDateTime &issueingDateTime) const
+{
+    QDate date = issueingDateTime.date().addDays(departureDate);
+    QTime time = QTime(0, 0).addSecs(departureTime);
+    if (departureUTCOffsetIsSet()) {
+        return QDateTime(date, time, Qt::OffsetFromUTC, -departureUTCOffset * 15 * 60);
+    }
+    return QDateTime(date, time);
+}
+
+QDateTime Fcb::ReservationData::arrivalDateTime(const QDateTime &issueingDateTime) const
+{
+    const auto departureDt = departureDateTime(issueingDateTime);
+    QDate date = departureDt.date().addDays(arrivalDate);
+    QTime time = QTime(0, 0).addSecs(arrivalTime);
+    if (arrivalUTCOffsetIsSet()) {
+        return QDateTime(date, time, Qt::OffsetFromUTC, -arrivalUTCOffset * 15 * 60);
+    }
+    if (departureDt.timeSpec() == Qt::OffsetFromUTC) {
+        return QDateTime(date, time, Qt::OffsetFromUTC, departureDt.offsetFromUtc());
+    }
+    return QDateTime(date, time);
+}
+
 void Fcb::CarCarriageReservationData::decode(UPERDecoder &decoder)
 {
     decodeSequence(decoder);
@@ -502,6 +526,30 @@ void Fcb::OpenTicketData::decode(UPERDecoder &decoder)
     FCB_READ_CUSTOM(extension);
 }
 
+QDateTime Fcb::OpenTicketData::validFrom(const QDateTime &issueingDateTime) const
+{
+    QDate date = issueingDateTime.date().addDays(validFromDay);
+    QTime time = validFromTimeIsSet() ? QTime(0, 0).addSecs(validFromTime) : QTime();
+    if (validFromUTCOffsetIsSet()) {
+        return QDateTime(date, time, Qt::OffsetFromUTC, -validFromUTCOffset * 15 * 60);
+    }
+    return QDateTime(date, time);
+}
+
+QDateTime Fcb::OpenTicketData::validUntil(const QDateTime &issueingDateTime) const
+{
+    const auto validFromDt = validFrom(issueingDateTime);
+    QDate date = validFromDt.date().addDays(validUntilDay);
+    QTime time = validUntilDayIsSet() ? QTime(0, 0).addSecs(validUntilTime) : QTime(23, 59, 59);
+    if (validUntilUTCOffsetIsSet()) {
+        return QDateTime(date, time, Qt::OffsetFromUTC, -validUntilUTCOffset * 15 * 60);
+    }
+    if (validFromDt.timeSpec() == Qt::OffsetFromUTC) {
+        return QDateTime(date, time, Qt::OffsetFromUTC, validFromDt.offsetFromUtc());
+    }
+    return QDateTime(date, time);
+}
+
 void Fcb::TimeRangeType::decode(UPERDecoder &decoder)
 {
     decodeSequence(decoder);
@@ -562,6 +610,30 @@ void Fcb::PassData::decode(UPERDecoder &decoder)
     FCB_READ_CUSTOM(extension);
 }
 
+QDateTime Fcb::PassData::validFrom(const QDateTime &issueingDateTime) const
+{
+    QDate date = issueingDateTime.date().addDays(validFromDay);
+    QTime time = validFromTimeIsSet() ? QTime(0, 0).addSecs(validFromTime) : QTime();
+    if (validFromUTCOffsetIsSet()) {
+        return QDateTime(date, time, Qt::OffsetFromUTC, -validFromUTCOffset * 15 * 60);
+    }
+    return QDateTime(date, time);
+}
+
+QDateTime Fcb::PassData::validUntil(const QDateTime &issueingDateTime) const
+{
+    const auto validFromDt = validFrom(issueingDateTime);
+    QDate date = validFromDt.date().addDays(validUntilDay);
+    QTime time = validUntilDayIsSet() ? QTime(0, 0).addSecs(validUntilTime) : QTime(23, 59, 59);
+    if (validUntilUTCOffsetIsSet()) {
+        return QDateTime(date, time, Qt::OffsetFromUTC, -validUntilUTCOffset * 15 * 60);
+    }
+    if (validFromDt.timeSpec() == Qt::OffsetFromUTC) {
+        return QDateTime(date, time, Qt::OffsetFromUTC, validFromDt.offsetFromUtc());
+    }
+    return QDateTime(date, time);
+}
+
 void Fcb::VoucherData::decode(UPERDecoder &decoder)
 {
     decodeSequence(decoder);

src/lib/era/fcbticket.h

@@ -501,6 +501,10 @@ class ReservationData {
     UPER_ELEMENT_OPTIONAL(QString, infoText)
     UPER_ELEMENT_OPTIONAL(KItinerary::Fcb::ExtensionData, extension)
     UPER_GADGET_FINALIZE
+
+public:
+    Q_INVOKABLE QDateTime departureDateTime(const QDateTime &issueingDateTime) const;
+    Q_INVOKABLE QDateTime arrivalDateTime(const QDateTime &issueingDateTime) const;
 };
 
 enum RoofRackType {
@@ -615,6 +619,10 @@ class OpenTicketData {
     UPER_ELEMENT_OPTIONAL(KItinerary::Fcb::LuggageRestrictionType, luggage)
     UPER_ELEMENT_OPTIONAL(KItinerary::Fcb::ExtensionData, extension)
     UPER_GADGET_FINALIZE
+
+public:
+    Q_INVOKABLE QDateTime validFrom(const QDateTime &issueingDateTime) const;
+    Q_INVOKABLE QDateTime validUntil(const QDateTime &issueingDateTime) const;
 };
 
 class TimeRangeType {
@@ -678,6 +686,10 @@ class PassData {
     UPER_ELEMENT_OPTIONAL(QString, infoText)
     UPER_ELEMENT_OPTIONAL(KItinerary::Fcb::ExtensionData, extension)
     UPER_GADGET_FINALIZE
+
+public:
+    Q_INVOKABLE QDateTime validFrom(const QDateTime &issueingDateTime) const;
+    Q_INVOKABLE QDateTime validUntil(const QDateTime &issueingDateTime) const;
 };
 
 class VoucherData {