annotate framework/VersionTester.cpp @ 588:d122d3595a32

Store aggregate models in the document and release them when they are invalidated (because their components have been released). They're no longer leaked, but we still don't save them in the session file.

/* -*- c-basic-offset: 4 indent-tabs-mode: nil -*-  vi:set ts=8 sts=4 sw=4: */

/*
    Sonic Visualiser
    An audio file viewer and annotation editor.
    Centre for Digital Music, Queen Mary, University of London.
    
    This program is free software; you can redistribute it and/or
    modify it under the terms of the GNU General Public License as
    published by the Free Software Foundation; either version 2 of the
    License, or (at your option) any later version.  See the file
    COPYING included with this distribution for more information.
*/

/*
   This is a modified version of a source file from the 
   Rosegarden MIDI and audio sequencer and notation editor.
   This file copyright 2000-2009 Chris Cannam.
*/

#include "VersionTester.h"
#include "base/Debug.h"

#include <iostream>

#include <QNetworkAccessManager>


VersionTester::VersionTester(QString hostname, QString versionFilePath,
			     QString myVersion) :
    m_myVersion(myVersion),
    m_reply(0),
    m_httpFailed(false),
    m_nm(new QNetworkAccessManager)
{
    QUrl url(QString("http://%1/%2").arg(hostname).arg(versionFilePath));
    cerr << "VersionTester: URL is " << url << endl;
    m_reply = m_nm->get(QNetworkRequest(url));
    connect(m_reply, SIGNAL(error(QNetworkReply::NetworkError)),
            this, SLOT(error(QNetworkReply::NetworkError)));
    connect(m_reply, SIGNAL(finished()), this, SLOT(finished()));
}

VersionTester::~VersionTester()
{
    if (m_reply) {
        m_reply->abort();
        m_reply->deleteLater();
    }
    delete m_nm;
}

bool
VersionTester::isVersionNewerThan(QString a, QString b)
{
    QRegExp re("[._-]");
    QStringList alist = a.split(re, QString::SkipEmptyParts);
    QStringList blist = b.split(re, QString::SkipEmptyParts);
    int ae = alist.size();
    int be = blist.size();
    int e = std::max(ae, be);
    for (int i = 0; i < e; ++i) {
        int an = 0, bn = 0;
        if (i < ae) {
            an = alist[i].toInt();
            if (an == 0 && alist[i] != "0") {
                an = -1; // non-numeric field -> "-pre1" etc
            }
        }
        if (i < be) {
            bn = blist[i].toInt();
            if (bn == 0 && blist[i] != "0") {
                bn = -1;
            }
        }
        if (an < bn) return false;
        if (an > bn) return true;
    }
    return false;
}

void
VersionTester::error(QNetworkReply::NetworkError)
{
    cerr << "VersionTester: error: " << m_reply->errorString() << endl;
    m_httpFailed = true;
}

void
VersionTester::finished()
{
    QNetworkReply *r = m_reply;
    m_reply = 0;

    r->deleteLater();
    if (m_httpFailed) return;

    int status = r->attribute(QNetworkRequest::HttpStatusCodeAttribute).toInt();
    if (status / 100 != 2) {
        cerr << "VersionTester: error: http status = " << status << endl;
        return;
    }

    QByteArray responseData = r->readAll();
    QString str = QString::fromUtf8(responseData.data());
    QStringList lines = str.split('\n', QString::SkipEmptyParts);
    if (lines.empty()) return;

    QString latestVersion = lines[0];
    cerr << "Comparing current version \"" << m_myVersion << "\" with latest version \"" << latestVersion << "\"" << endl;
    if (isVersionNewerThan(latestVersion, m_myVersion)) {
        cerr << "Latest version \"" << latestVersion << "\" is newer than current version \"" << m_myVersion << "\"" << endl;
        emit newerVersionAvailable(latestVersion);
    }
}