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     request.setHeader(QNetworkRequest::ContentTypeHeader, "application/x-www-form-urlencoded");
  65     qDebug() << "fetching schedule for station:" << station << "code:" << stationCode;
  66     const QString queryString =
  67             stationCode.isEmpty() ? "stazione=" + station :
  68                                     "codiceStazione=" + stationCode;
  69     const QByteArray query(queryString.toLocal8Bit());
  70     stationQueryReply = accessManager->post(request, query);
  71     connect(stationQueryReply, SIGNAL(metaDataChanged()),
  72             SLOT(onStationQueryMetadataChanged()));
  73     connect(stationQueryReply, SIGNAL(finished()),
  74             SLOT(onStationScheduleFetched()));
  75     connect(stationQueryReply, SIGNAL(error(QNetworkReply::NetworkError)),
  76             SLOT(onNetworkError(QNetworkReply::NetworkError)));
  77     QStringList recentStations = settings->recentStations();
  78     recentStations.push_front(station);
  79     recentStations.removeDuplicates();
  80     if (recentStations.count() > RECENT_STATIONS_MAX_COUNT) {
  81         recentStations.pop_back();
  82     }
  83     settings->setRecentStations(recentStations);
  84 }
  85
  86 void DataProvider::updateStation()
  87 {
  88     Settings *settings = Settings::instance();
  89
  90     qDebug() << "updating station data";
  91     if (!settings->recentStations().isEmpty()) {
  92         fetchStationSchedule(settings->recentStations().front());
  93     }
  94 }
  95
  96 void DataProvider::onStationScheduleFetched()
  97 {
  98     disconnect(stationQueryReply);
  99
 100     QVariant httpStatus = stationQueryReply->attribute(QNetworkRequest::HttpStatusCodeAttribute);
 101     if (httpStatus.isValid()) {
 102         qDebug() << "Metadata changed, Http status is:" << httpStatus.toInt();
 103     }
 104     emit stationScheduleReady(stationQueryReply->readAll(), stationQueryReply->url());
 105     stationQueryReply->deleteLater();
 106     stationQueryReply = 0;
 107 }
 108
 109 void DataProvider::onStationQueryMetadataChanged(void)
 110 {
 111 }
 112
 113 void DataProvider::onNetworkError(QNetworkReply::NetworkError errorCode)
 114 {
 115     switch (errorCode) {
 116     case QNetworkReply::NoError:
 117         qDebug() << "No Network error" << errorCode;
 118         break;
 119     default:
 120         qDebug() << "Network error" << errorCode;
 121         emit error();
 122         break;
 123     }
 124 }