client.cpp Example File

 /****************************************************************************
 **
 ** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
 ** All rights reserved.
 ** Contact: Nokia Corporation ([email protected])
 **
 ** 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 Nokia Corporation and its Subsidiary(-ies) 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();
 }