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@560:     Copyright (c) 2012 Chris Cannam
Chris@560:     Copyright (c) 2012 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@491: #include <QHttp>
Chris@491: 
Chris@491: VersionTester::VersionTester(QString hostname, QString versionFilePath,
Chris@491: 			     QString myVersion) :
Chris@491:     m_httpFailed(false),
Chris@491:     m_myVersion(myVersion)
Chris@491: {
Chris@491:     QHttp *http = new QHttp();
Chris@491:     connect(http, SIGNAL(responseHeaderReceived(const QHttpResponseHeader &)),
Chris@491:             this, SLOT(httpResponseHeaderReceived(const QHttpResponseHeader &)));
Chris@491:     connect(http, SIGNAL(done(bool)),
Chris@491:             this, SLOT(httpDone(bool)));
Chris@491:     http->setHost(hostname);
Chris@491:     http->get(versionFilePath);
Chris@491: }
Chris@491: 
Chris@491: VersionTester::~VersionTester()
Chris@491: {
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@491: VersionTester::httpResponseHeaderReceived(const QHttpResponseHeader &h)
Chris@491: {
Chris@491:     if (h.statusCode() / 100 != 2) m_httpFailed = true;
Chris@491: }
Chris@491: 
Chris@491: void
Chris@491: VersionTester::httpDone(bool error)
Chris@491: {
Chris@491:     QHttp *http = const_cast<QHttp *>(dynamic_cast<const QHttp *>(sender()));
Chris@491:     if (!http) return;
Chris@491:     http->deleteLater();
Chris@491:     if (error || m_httpFailed) return;
Chris@491: 
Chris@491:     QByteArray responseData = http->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@491: 	  << "\" with latest version \"" << latestVersion
Chris@491: 	  << "\"" << endl;
Chris@491:     if (isVersionNewerThan(latestVersion, m_myVersion)) {
Chris@491:         emit newerVersionAvailable(latestVersion);
Chris@491:     }
Chris@491: }
Chris@491: 
Chris@491: