File indexing completed on 2024-05-05 04:42:47

 /*
     SPDX-FileCopyrightText: 2021 Volker Krause <vkrause@kde.org>
 
     SPDX-License-Identifier: LGPL-2.0-or-later
 */
 
 #include "ifoptutil.h"
 
 #include <QDebug>
 #include <QStringView>
 
 using namespace KPublicTransport;
 
 bool IfoptUtil::isValid(QStringView ifopt)
 {
     if (ifopt.size() < 6) {
         return false;
     }
 
     qsizetype pos = 0;
     int elementCount = 1;
     do {
         const auto idx = ifopt.indexOf(QLatin1Char(':'), pos);
         elementCount += (idx > pos) ? 1 : 0;
         if (idx == pos || idx == ifopt.size() - 1 || (elementCount < 3 && idx < 0)) {
             return false;
         }
         pos = idx + 1;
     } while (pos != 0 && pos < ifopt.size());
 
     return elementCount >= 3 && elementCount <= 5 && ifopt[0].isLetter() && ifopt[1].isLetter() && ifopt[2] == QLatin1Char(':');
 }
 
 static QStringView ifoptPrefix(QStringView ifopt, int elementCount)
 {
     qsizetype pos = 0;
     for (int i = 0; i < elementCount; i++) {
         pos = ifopt.indexOf(QLatin1Char(':'), pos) + 1;
     }
     return ifopt.left(pos - 1);
 }
 
 QStringView IfoptUtil::country(QStringView ifopt)
 {
     return ifoptPrefix(ifopt, 1);
 }
 
 QStringView IfoptUtil::stopPlace(QStringView ifopt)
 {
     return ifoptPrefix(ifopt, 3);
 }
 
 QStringView IfoptUtil::level(QStringView ifopt)
 {
     return ifoptPrefix(ifopt, 4);
 }
 
 bool IfoptUtil::isSameStopPlace(QStringView lhs, QStringView rhs)
 {
     return stopPlace(lhs) == stopPlace(rhs);
 }
 
 QStringView IfoptUtil::merge(QStringView lhs, QStringView rhs)
 {
     if (lhs.isEmpty()) {
         return rhs;
     }
     if (rhs.isEmpty()) {
         return lhs;
     }
 
     if (lhs == rhs) {
         return lhs;
     }
 
     if (level(lhs) == level(rhs)) {
         return level(lhs);
     }
 
     return stopPlace(lhs);
 }
 
 QString IfoptUtil::identifierType()
 {
     return QStringLiteral("ifopt");
 }