vcs.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 #include <QWebElement>
  32 #include <QWebFrame>
  33 #include <QWebPage>
  34
  35 // Constants
  36 static const int RECENT_STATIONS_MAX_COUNT = 10;
  37
  38 // Class methods
  39
  40 DataProvider *DataProvider::instance()
  41 {
  42     static DataProvider *dataProvider = 0;
  43
  44     if (!dataProvider)
  45         dataProvider = new DataProvider(0);
  46     return dataProvider;
  47 }
  48
  49 DataProvider::DataProvider(QObject *parent) :
  50     QObject(parent),
  51     accessManager(new QNetworkAccessManager(this)),
  52     stationQueryReply(0)
  53 {
  54 }
  55
  56 void DataProvider::fetchStationSchedule(const QString &station,
  57                                         const QString &stationCode)
  58 {
  59     QNetworkRequest request;
  60     Settings *settings = Settings::instance();
  61     request.setUrl(settings->queryBaseUrl() + "stazione");
  62     qDebug() << "fetching schedule for station:" << station << "code:" << stationCode;
  63     const QString queryString =
  64             stationCode.isEmpty() ? "stazione=" + station :
  65                                     "codiceStazione=" + stationCode;
  66     const QByteArray query(queryString.toLocal8Bit());
  67     stationQueryReply = accessManager->post(request, query);
  68     connect(stationQueryReply, SIGNAL(metaDataChanged()),
  69             SLOT(onStationQueryMetadataChanged()));
  70     connect(stationQueryReply, SIGNAL(finished()),
  71             SLOT(onStationScheduleFetched()));
  72     connect(stationQueryReply, SIGNAL(error(QNetworkReply::NetworkError)),
  73             SLOT(onNetworkError(QNetworkReply::NetworkError)));
  74     QStringList recentStations = settings->recentStations();
  75     recentStations.push_front(station);
  76     recentStations.removeDuplicates();
  77     if (recentStations.count() > RECENT_STATIONS_MAX_COUNT) {
  78         recentStations.pop_back();
  79     }
  80     settings->setRecentStations(recentStations);
  81 }
  82
  83 void DataProvider::updateStation()
  84 {
  85     Settings *settings = Settings::instance();
  86
  87     qDebug() << "updating station data";
  88     if (!settings->recentStations().isEmpty()) {
  89         fetchStationSchedule(settings->recentStations().front());
  90     }
  91 }
  92
  93 void DataProvider::onStationScheduleFetched()
  94 {
  95     disconnect(stationQueryReply);
  96
  97     QVariant httpStatus = stationQueryReply->attribute(QNetworkRequest::HttpStatusCodeAttribute);
  98     if (httpStatus.isValid()) {
  99         qDebug() << "Metadata changed, Http status is:" << httpStatus.toInt();
 100     }
 101     emit stationScheduleReady(stationQueryReply->readAll(), stationQueryReply->url());
 102     stationQueryReply->deleteLater();
 103     stationQueryReply = 0;
 104 }
 105
 106 void DataProvider::onStationQueryMetadataChanged(void)
 107 {
 108 }
 109
 110 void DataProvider::onNetworkError(QNetworkReply::NetworkError errorCode)
 111 {
 112     switch (errorCode) {
 113     case QNetworkReply::NoError:
 114         qDebug() << "No Network error" << errorCode;
 115         break;
 116     default:
 117         qDebug() << "Network error" << errorCode;
 118         emit error();
 119         break;
 120     }
 121 }