Chris@491: /* -*- c-basic-offset: 4 indent-tabs-mode: nil -*-  vi:set ts=8 sts=4 sw=4: */
Chris@491: 
Chris@491: /*
Chris@491:     EasyMercurial
Chris@491: 
Chris@491:     Based on hgExplorer by Jari Korhonen
Chris@491:     Copyright (c) 2010 Jari Korhonen
Chris@644:     Copyright (c) 2013 Chris Cannam
Chris@644:     Copyright (c) 2013 Queen Mary, University of London
Chris@491:     
Chris@491:     This program is free software; you can redistribute it and/or
Chris@491:     modify it under the terms of the GNU General Public License as
Chris@491:     published by the Free Software Foundation; either version 2 of the
Chris@491:     License, or (at your option) any later version.  See the file
Chris@491:     COPYING included with this distribution for more information.
Chris@491: */
Chris@491: 
Chris@491: #include "versiontester.h"
Chris@491: #include "debug.h"
Chris@491: 
Chris@491: #include <iostream>
Chris@491: 
Chris@663: #include <QNetworkAccessManager>
Chris@663: 
Chris@663: static QNetworkAccessManager nm;
Chris@491: 
Chris@491: VersionTester::VersionTester(QString hostname, QString versionFilePath,
Chris@491: 			     QString myVersion) :
Chris@663:     m_myVersion(myVersion),
Chris@663:     m_reply(0),
Chris@663:     m_httpFailed(false)
Chris@491: {
Chris@663:     QUrl url(QString("http://%1/%2").arg(hostname).arg(versionFilePath));
Chris@663:     std::cerr << "VersionTester: URL is " << url << std::endl;
Chris@663:     m_reply = nm.get(QNetworkRequest(url));
Chris@663:     connect(m_reply, SIGNAL(error(QNetworkReply::NetworkError)),
Chris@663:             this, SLOT(error(QNetworkReply::NetworkError)));
Chris@663:     connect(m_reply, SIGNAL(finished()), this, SLOT(finished()));
Chris@491: }
Chris@491: 
Chris@491: VersionTester::~VersionTester()
Chris@491: {
Chris@663:     if (m_reply) {
Chris@663:         m_reply->abort();
Chris@663:         m_reply->deleteLater();
Chris@663:     }
Chris@491: }
Chris@491: 
Chris@491: bool
Chris@491: VersionTester::isVersionNewerThan(QString a, QString b)
Chris@491: {
Chris@491:     QRegExp re("[._-]");
Chris@491:     QStringList alist = a.split(re, QString::SkipEmptyParts);
Chris@491:     QStringList blist = b.split(re, QString::SkipEmptyParts);
Chris@491:     int ae = alist.size();
Chris@491:     int be = blist.size();
Chris@491:     int e = std::max(ae, be);
Chris@491:     for (int i = 0; i < e; ++i) {
Chris@491:     int an = 0, bn = 0;
Chris@491:     if (i < ae) {
Chris@491:         an = alist[i].toInt();
Chris@491:         if (an == 0) an = -1; // non-numeric field -> "-pre1" etc
Chris@491:     }
Chris@491:     if (i < be) {
Chris@491:         bn = blist[i].toInt();
Chris@491:         if (bn == 0) bn = -1;
Chris@491:     }
Chris@491:     if (an < bn) return false;
Chris@491:     if (an > bn) return true;
Chris@491:     }
Chris@491:     return false;
Chris@491: }
Chris@491: 
Chris@491: void
Chris@663: VersionTester::error(QNetworkReply::NetworkError)
Chris@491: {
Chris@663:     std::cerr << "VersionTester: error: " << m_reply->errorString() << std::endl;
Chris@663:     m_httpFailed = true;
Chris@491: }
Chris@491: 
Chris@491: void
Chris@663: VersionTester::finished()
Chris@491: {
Chris@663:     m_reply->deleteLater();
Chris@663:     if (m_httpFailed) return;
Chris@491: 
Chris@663:     int status = m_reply->attribute(QNetworkRequest::HttpStatusCodeAttribute).toInt();
Chris@663:     if (status / 100 != 2) {
Chris@663:         std::cerr << "VersionTester: error: http status = " << status << std::endl;
Chris@663:         return;
Chris@663:     }
Chris@663: 
Chris@663:     QByteArray responseData = m_reply->readAll();
Chris@491:     QString str = QString::fromUtf8(responseData.data());
Chris@491:     QStringList lines = str.split('\n', QString::SkipEmptyParts);
Chris@491:     if (lines.empty()) return;
Chris@491: 
Chris@491:     QString latestVersion = lines[0];
Chris@491:     DEBUG << "Comparing current version \"" << m_myVersion
Chris@663:           << "\" with latest version \"" << latestVersion
Chris@663:           << "\"" << endl;
Chris@491:     if (isVersionNewerThan(latestVersion, m_myVersion)) {
Chris@491:         emit newerVersionAvailable(latestVersion);
Chris@491:     }
Chris@491: }
Chris@491: