git.maemo.org Git - quandoparte/blob - application/dataprovider.cpp

   1 /*
   2
   3 Copyright (C) 2011 Luciano Montanaro <mikelima@cirulla.net>
   4
   5 This program is free software; you can redistribute it and/or modify
   6 it under the terms of the GNU General Public License as published by
   7 the Free Software Foundation; either version 2 of the License, or
   8 (at your option) any later version.
   9
  10 This program is distributed in the hope that it will be useful,
  11 but WITHOUT ANY WARRANTY; without even the implied warranty of
  12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13 General Public License for more details.
  14
  15 You should have received a copy of the GNU General Public License
  16 along with this program; see the file COPYING.  If not, write to
  17 the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  18 Boston, MA 02110-1301, USA.
  19
  20 */
  21
  22 #include "dataprovider.h"
  23 #include "settings.h"
  24 #include "stationschedulemodel.h"
  25
  26 #include <QDebug>
  27 #include <QNetworkAccessManager>
  28 #include <QNetworkReply>
  29 #include <QNetworkRequest>
  30 #include <QSharedPointer>
  31 #if 0
  32 #include <QWebElement>
  33 #include <QWebFrame>
  34 #include <QWebPage>
  35 #endif
  36
  37 // Constants
  38 static const int RECENT_STATIONS_MAX_COUNT = 10;
  39
  40 // Class methods
  41
  42 DataProvider *DataProvider::instance()
  43 {
  44     static DataProvider *dataProvider = 0;
  45
  46     if (!dataProvider)
  47         dataProvider = new DataProvider(0);
  48     return dataProvider;
  49 }
  50
  51 DataProvider::DataProvider(QObject *parent) :
  52     QObject(parent),
  53     accessManager(new QNetworkAccessManager(this)),
  54     stationQueryReply(0)
  55 {
  56 }
  57
  58 void DataProvider::fetchStationSchedule(const QString &station,
  59                                         const QString &stationCode)
  60 {
  61     QNetworkRequest request;
  62     Settings *settings = Settings::instance();
  63     request.setUrl(settings->queryBaseUrl() + "stazione");
  64     qDebug() << "fetching schedule for station:" << station << "code:" << stationCode;
  65     const QString queryString =
  66             stationCode.isEmpty() ? "stazione=" + station :
  67                                     "codiceStazione=" + stationCode;
  68     const QByteArray query(queryString.toLocal8Bit());
  69     stationQueryReply = accessManager->post(request, query);
  70     connect(stationQueryReply, SIGNAL(metaDataChanged()),
  71             SLOT(onStationQueryMetadataChanged()));
  72     connect(stationQueryReply, SIGNAL(finished()),
  73             SLOT(onStationScheduleFetched()));
  74     connect(stationQueryReply, SIGNAL(error(QNetworkReply::NetworkError)),
  75             SLOT(onNetworkError(QNetworkReply::NetworkError)));
  76     QStringList recentStations = settings->recentStations();
  77     recentStations.push_front(station);
  78     recentStations.removeDuplicates();
  79     if (recentStations.count() > RECENT_STATIONS_MAX_COUNT) {
  80         recentStations.pop_back();
  81     }
  82     settings->setRecentStations(recentStations);
  83 }
  84
  85 void DataProvider::updateStation()
  86 {
  87     Settings *settings = Settings::instance();
  88
  89     qDebug() << "updating station data";
  90     if (!settings->recentStations().isEmpty()) {
  91         fetchStationSchedule(settings->recentStations().front());
  92     }
  93 }
  94
  95 void DataProvider::onStationScheduleFetched()
  96 {
  97     disconnect(stationQueryReply);
  98
  99     QVariant httpStatus = stationQueryReply->attribute(QNetworkRequest::HttpStatusCodeAttribute);
 100     if (httpStatus.isValid()) {
 101         qDebug() << "Metadata changed, Http status is:" << httpStatus.toInt();
 102     }
 103     emit stationScheduleReady(stationQueryReply->readAll(), stationQueryReply->url());
 104     stationQueryReply->deleteLater();
 105     stationQueryReply = 0;
 106 }
 107
 108 void DataProvider::onStationQueryMetadataChanged(void)
 109 {
 110 }
 111
 112 void DataProvider::onNetworkError(QNetworkReply::NetworkError errorCode)
 113 {
 114     switch (errorCode) {
 115     case QNetworkReply::NoError:
 116         qDebug() << "No Network error" << errorCode;
 117         break;
 118     default:
 119         qDebug() << "Network error" << errorCode;
 120         emit error();
 121         break;
 122     }
 123 }