source: trunk/examples/network/network-chat/client.cpp@ 5

/****************************************************************************
**
** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
** Contact: Qt Software Information ([email protected])
**
** This file is part of the examples of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** Commercial Usage
** Licensees holding valid Qt Commercial licenses may use this file in
** accordance with the Qt Commercial License Agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and Nokia.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 2.1 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL included in the
** packaging of this file.  Please review the following information to
** ensure the GNU Lesser General Public License version 2.1 requirements
** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Nokia gives you certain
** additional rights. These rights are described in the Nokia Qt LGPL
** Exception version 1.0, included in the file LGPL_EXCEPTION.txt in this
** package.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3.0 as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL included in the
** packaging of this file.  Please review the following information to
** ensure the GNU General Public License version 3.0 requirements will be
** met: http://www.gnu.org/copyleft/gpl.html.
**
** If you are unsure which license is appropriate for your use, please
** contact the sales department at [email protected].
** $QT_END_LICENSE$
**
****************************************************************************/

#include <QtNetwork>

#include "client.h"
#include "connection.h"
#include "peermanager.h"

Client::Client()
{
    peerManager = new PeerManager(this);
    peerManager->setServerPort(server.serverPort());
    peerManager->startBroadcasting();

    QObject::connect(peerManager, SIGNAL(newConnection(Connection *)),
                     this, SLOT(newConnection(Connection *)));
    QObject::connect(&server, SIGNAL(newConnection(Connection *)),
                     this, SLOT(newConnection(Connection *)));
}

void Client::sendMessage(const QString &message)
{
    if (message.isEmpty())
        return;

    QList<Connection *> connections = peers.values();
    foreach (Connection *connection, connections)
        connection->sendMessage(message);
}

QString Client::nickName() const
{
    return QString(peerManager->userName()) + "@" + QHostInfo::localHostName()
           + ":" + QString::number(server.serverPort());
}

bool Client::hasConnection(const QHostAddress &senderIp, int senderPort) const
{
    if (senderPort == -1)
        return peers.contains(senderIp);

    if (!peers.contains(senderIp))
        return false;

    QList<Connection *> connections = peers.values(senderIp);
    foreach (Connection *connection, connections) {
        if (connection->peerPort() == senderPort)
            return true;
    }

    return false;
}

void Client::newConnection(Connection *connection)
{
    connection->setGreetingMessage(peerManager->userName());

    connect(connection, SIGNAL(error(QAbstractSocket::SocketError)),
            this, SLOT(connectionError(QAbstractSocket::SocketError)));
    connect(connection, SIGNAL(disconnected()), this, SLOT(disconnected()));
    connect(connection, SIGNAL(readyForUse()), this, SLOT(readyForUse()));
}

void Client::readyForUse()
{
    Connection *connection = qobject_cast<Connection *>(sender());
    if (!connection || hasConnection(connection->peerAddress(),
                                     connection->peerPort()))
        return;

    connect(connection, SIGNAL(newMessage(const QString &, const QString &)),
            this, SIGNAL(newMessage(const QString &, const QString &)));

    peers.insert(connection->peerAddress(), connection);
    QString nick = connection->name();
    if (!nick.isEmpty())
        emit newParticipant(nick);
}

void Client::disconnected()
{
    if (Connection *connection = qobject_cast<Connection *>(sender()))
        removeConnection(connection);
}

void Client::connectionError(QAbstractSocket::SocketError /* socketError */)
{
    if (Connection *connection = qobject_cast<Connection *>(sender()))
        removeConnection(connection);
}

void Client::removeConnection(Connection *connection)
{
    if (peers.contains(connection->peerAddress())) {
        peers.remove(connection->peerAddress());
        QString nick = connection->name();
        if (!nick.isEmpty())
            emit participantLeft(nick);
    }
    connection->deleteLater();
}