examples/xmlpatterns/trafficinfo/timequery.cpp

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  40
  41 #include "timequery.h"
  42
  43 #include <QtCore/QStringList>
  44 #include <QtXmlPatterns/QXmlQuery>
  45
  46 TimeInformation::TimeInformation(const QString &time, const QString &direction)
  47     : m_time(time), m_direction(direction)
  48 {
  49 }
  50
  51 QString TimeInformation::time() const
  52 {
  53     return m_time;
  54 }
  55
  56 QString TimeInformation::direction() const
  57 {
  58     return m_direction;
  59 }
  60
  61 TimeInformation::List TimeQuery::query(const QString &stationId, const QStringList &lineNumbers, const QDateTime &dateTime)
  62 {
  63     const TimeInformation::List information = queryInternal(stationId, dateTime);
  64
  65     TimeInformation::List filteredInformation;
  66
  67     if (!lineNumbers.isEmpty()) {
  68         for (int i = 0; i < information.count(); ++i) {
  69             const TimeInformation info = information.at(i);
  70             for (int j = 0; j < lineNumbers.count(); ++j) {
  71                 if (info.direction().startsWith(QString("%1 ").arg(lineNumbers.at(j))))
  72                     filteredInformation.append(info);
  73             }
  74         }
  75     } else {
  76         filteredInformation = information;
  77     }
  78
  79     return filteredInformation;
  80 }
  81
  82 //! [1]
  83 TimeInformation::List TimeQuery::queryInternal(const QString &stationId, const QDateTime &dateTime)
  84 {
  85     const QString timesQueryUrl = QString("doc('http://wap.trafikanten.no/F.asp?f=%1&amp;t=%2&amp;m=%3&amp;d=%4&amp;start=1')/wml/card/p/small/a[fn:starts-with(@href, 'Rute')]/string()")
  86                                          .arg(stationId)
  87                                          .arg(dateTime.time().hour())
  88                                          .arg(dateTime.time().minute())
  89                                          .arg(dateTime.toString("dd.MM.yyyy"));
  90     const QString directionsQueryUrl = QString("doc('http://wap.trafikanten.no/F.asp?f=%1&amp;t=%2&amp;m=%3&amp;d=%4&amp;start=1')/wml/card/p/small/text()[matches(., '[0-9].*')]/string()")
  91                                               .arg(stationId)
  92                                               .arg(dateTime.time().hour())
  93                                               .arg(dateTime.time().minute())
  94                                               .arg(dateTime.toString("dd.MM.yyyy"));
  95
  96     QStringList times;
  97     QStringList directions;
  98
  99     QXmlQuery query;
 100     query.setQuery(timesQueryUrl);
 101     query.evaluateTo(&times);
 102
 103     query.setQuery(directionsQueryUrl);
 104     query.evaluateTo(&directions);
 105
 106     if (times.count() != directions.count()) // something went wrong...
 107         return TimeInformation::List();
 108
 109     TimeInformation::List information;
 110     for (int i = 0; i < times.count(); ++i)
 111         information.append(TimeInformation(times.at(i).simplified(), directions.at(i).simplified()));
 112
 113     return information;
 114 }
 115 //! [1]