Fix error reporting in the station page
[quandoparte] / 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 {
53 }
54
55 void DataProvider::fetchStationSchedule(const QString &station,
56                                         const QString &stationCode)
57 {
58     QNetworkRequest request;
59     Settings *settings = Settings::instance();
60     request.setUrl(settings->queryBaseUrl() + "stazione");
61     qDebug() << "fetching schedule for station:" << station << "code:" << stationCode;
62     const QString queryString =
63             stationCode.isEmpty() ? "stazione=" + station :
64                                     "codiceStazione=" + stationCode;
65     const QByteArray query(queryString.toLocal8Bit());
66     stationQueryReply = accessManager->post(request, query);
67     connect(stationQueryReply, SIGNAL(finished()),
68             SLOT(onStationScheduleFetched()));
69     connect(stationQueryReply, SIGNAL(error(QNetworkReply::NetworkError)),
70             SLOT(onNetworkError(QNetworkReply::NetworkError)));
71     QStringList recentStations = settings->recentStations();
72     recentStations.push_front(station);
73     recentStations.removeDuplicates();
74     if (recentStations.count() > RECENT_STATIONS_MAX_COUNT) {
75         recentStations.pop_back();
76     }
77     settings->setRecentStations(recentStations);
78 }
79
80 void DataProvider::updateStation()
81 {
82     Settings *settings = Settings::instance();
83
84     qDebug() << "updating station data";
85     if (!settings->recentStations().isEmpty()) {
86         fetchStationSchedule(settings->recentStations().front());
87     }
88 }
89
90 void DataProvider::onStationScheduleFetched()
91 {
92     disconnect(stationQueryReply);
93
94     QString name = Settings::instance()->recentStations().front();
95
96     emit stationScheduleReady(stationQueryReply->readAll(), stationQueryReply->url());
97     stationQueryReply->deleteLater();
98     stationQueryReply = 0;
99 }
100
101 void DataProvider::onNetworkError(QNetworkReply::NetworkError errorCode)
102 {
103     switch (errorCode) {
104     case QNetworkReply::NoError:
105         qDebug() << "No Network error" << errorCode;
106         break;
107     default:
108         qDebug() << "SNetwork error" << errorCode;
109         emit error();
110         break;
111     }
112 }