Integrated imagefetcher and iterated imagefetcher related codes
[situare] / src / situareservice / imagefetcher.cpp
1 /*
2    Situare - A location system for Facebook
3    Copyright (C) 2010  Ixonos Plc. Authors:
4
5       Henri Lampela - henri.lampela@ixonos.com
6
7    Situare is free software; you can redistribute it and/or
8    modify it under the terms of the GNU General Public License
9    version 2 as published by the Free Software Foundation.
10
11    Situare is distributed in the hope that it will be useful,
12    but WITHOUT ANY WARRANTY; without even the implied warranty of
13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
14    GNU General Public License for more details.
15
16    You should have received a copy of the GNU General Public License
17    along with Situare; if not, write to the Free Software
18    Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301,
19    USA.
20 */
21
22 #include <QDebug>
23 #include <QNetworkRequest>
24 #include <QNetworkReply>
25 #include <QPixmap>
26 #include "imagefetcher.h"
27
28 ImageFetcher::ImageFetcher(QNetworkAccessManager *manager, QObject *parent)
29     : QObject(parent)
30     , m_manager(manager)
31 {
32     qDebug() << __PRETTY_FUNCTION__;
33
34     connect(m_manager, SIGNAL(finished(QNetworkReply*)), this, SLOT(
35             downloadFinished(QNetworkReply*)));
36 }
37
38 void ImageFetcher::fetchImage(const QUrl &url)
39 {
40     qDebug() << __PRETTY_FUNCTION__;
41
42     m_downloadQueue.enqueue(url);
43
44     startNextDownload();
45 }
46
47 void ImageFetcher::startNextDownload()
48 {
49     qDebug() << __PRETTY_FUNCTION__;
50
51     QUrl url = m_downloadQueue.dequeue();
52
53     QNetworkRequest request(url);
54     request.setRawHeader("User-Agent", "Situare");
55     QNetworkReply *reply = m_manager->get(request);
56
57     m_currentDownloads.append(reply);
58 }
59
60 void ImageFetcher::downloadFinished(QNetworkReply *reply)
61 {
62     qDebug() << __PRETTY_FUNCTION__;
63
64     if (reply->error() == QNetworkReply::NoError) {
65         QPixmap image;
66         QUrl url = reply->url();
67
68         if (!image.loadFromData(reply->readAll(), 0))
69             image = QPixmap();
70
71         emit imageReceived(url, image);
72     }
73     else {
74         emit error(reply->errorString());
75     }
76
77     m_currentDownloads.removeAll(reply);
78     reply->deleteLater();
79
80     if (!m_downloadQueue.isEmpty())
81         startNextDownload();
82 }