view src/versiontester.cpp @ 558:d932ce55c364 find

Remove the single find widget from top, add one to each tab at the bottom instead. (Turns out you don't usually want to search for the same text in both types of widget.) Also provide sensible no-results text.

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

/*
    EasyMercurial

    Based on hgExplorer by Jari Korhonen
    Copyright (c) 2010 Jari Korhonen
    Copyright (c) 2011 Chris Cannam
    Copyright (c) 2011 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.
*/

#include "versiontester.h"
#include "debug.h"

#include <iostream>

#include <QHttp>

VersionTester::VersionTester(QString hostname, QString versionFilePath,
			     QString myVersion) :
    m_httpFailed(false),
    m_myVersion(myVersion)
{
    QHttp *http = new QHttp();
    connect(http, SIGNAL(responseHeaderReceived(const QHttpResponseHeader &)),
            this, SLOT(httpResponseHeaderReceived(const QHttpResponseHeader &)));
    connect(http, SIGNAL(done(bool)),
            this, SLOT(httpDone(bool)));
    http->setHost(hostname);
    http->get(versionFilePath);
}

VersionTester::~VersionTester()
{
}

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) an = -1; // non-numeric field -> "-pre1" etc
    }
    if (i < be) {
        bn = blist[i].toInt();
        if (bn == 0) bn = -1;
    }
    if (an < bn) return false;
    if (an > bn) return true;
    }
    return false;
}

void
VersionTester::httpResponseHeaderReceived(const QHttpResponseHeader &h)
{
    if (h.statusCode() / 100 != 2) m_httpFailed = true;
}

void
VersionTester::httpDone(bool error)
{
    QHttp *http = const_cast<QHttp *>(dynamic_cast<const QHttp *>(sender()));
    if (!http) return;
    http->deleteLater();
    if (error || m_httpFailed) return;

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

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