qt5base-lts/examples/network/network-chat/client.cpp

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/****************************************************************************
**
** Copyright (C) 2015 The Qt Company Ltd.
** Contact: http://www.qt.io/licensing/
**
** This file is part of the examples of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:BSD$
** You may use this file under the terms of the BSD license as follows:
**
** "Redistribution and use in source and binary forms, with or without
** modification, are permitted provided that the following conditions are
** met:
** * Redistributions of source code must retain the above copyright
** notice, this list of conditions and the following disclaimer.
** * Redistributions in binary form must reproduce the above copyright
** notice, this list of conditions and the following disclaimer in
** the documentation and/or other materials provided with the
** distribution.
** * Neither the name of The Qt Company Ltd nor the names of its
** contributors may be used to endorse or promote products derived
** from this software without specific prior written permission.
**
**
** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
**
** $QT_END_LICENSE$
**
****************************************************************************/
#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(QString,QString)),
this, SIGNAL(newMessage(QString,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();
}