examples/network/network-chat/client.cpp
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     1 /****************************************************************************
       
     2 **
       
     3 ** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
       
     4 ** All rights reserved.
       
     5 ** Contact: Nokia Corporation (qt-info@nokia.com)
       
     6 **
       
     7 ** This file is part of the examples of the Qt Toolkit.
       
     8 **
       
     9 ** $QT_BEGIN_LICENSE:LGPL$
       
    10 ** No Commercial Usage
       
    11 ** This file contains pre-release code and may not be distributed.
       
    12 ** You may use this file in accordance with the terms and conditions
       
    13 ** contained in the Technology Preview License Agreement accompanying
       
    14 ** this package.
       
    15 **
       
    16 ** GNU Lesser General Public License Usage
       
    17 ** Alternatively, this file may be used under the terms of the GNU Lesser
       
    18 ** General Public License version 2.1 as published by the Free Software
       
    19 ** Foundation and appearing in the file LICENSE.LGPL included in the
       
    20 ** packaging of this file.  Please review the following information to
       
    21 ** ensure the GNU Lesser General Public License version 2.1 requirements
       
    22 ** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
       
    23 **
       
    24 ** In addition, as a special exception, Nokia gives you certain additional
       
    25 ** rights.  These rights are described in the Nokia Qt LGPL Exception
       
    26 ** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
       
    27 **
       
    28 ** If you have questions regarding the use of this file, please contact
       
    29 ** Nokia at qt-info@nokia.com.
       
    30 **
       
    31 **
       
    32 **
       
    33 **
       
    34 **
       
    35 **
       
    36 **
       
    37 **
       
    38 ** $QT_END_LICENSE$
       
    39 **
       
    40 ****************************************************************************/
       
    41 
       
    42 #include <QtNetwork>
       
    43 
       
    44 #include "client.h"
       
    45 #include "connection.h"
       
    46 #include "peermanager.h"
       
    47 
       
    48 Client::Client()
       
    49 {
       
    50     peerManager = new PeerManager(this);
       
    51     peerManager->setServerPort(server.serverPort());
       
    52     peerManager->startBroadcasting();
       
    53 
       
    54     QObject::connect(peerManager, SIGNAL(newConnection(Connection *)),
       
    55                      this, SLOT(newConnection(Connection *)));
       
    56     QObject::connect(&server, SIGNAL(newConnection(Connection *)),
       
    57                      this, SLOT(newConnection(Connection *)));
       
    58 }
       
    59 
       
    60 void Client::sendMessage(const QString &message)
       
    61 {
       
    62     if (message.isEmpty())
       
    63         return;
       
    64 
       
    65     QList<Connection *> connections = peers.values();
       
    66     foreach (Connection *connection, connections)
       
    67         connection->sendMessage(message);
       
    68 }
       
    69 
       
    70 QString Client::nickName() const
       
    71 {
       
    72     return QString(peerManager->userName()) + "@" + QHostInfo::localHostName()
       
    73            + ":" + QString::number(server.serverPort());
       
    74 }
       
    75 
       
    76 bool Client::hasConnection(const QHostAddress &senderIp, int senderPort) const
       
    77 {
       
    78     if (senderPort == -1)
       
    79         return peers.contains(senderIp);
       
    80 
       
    81     if (!peers.contains(senderIp))
       
    82         return false;
       
    83 
       
    84     QList<Connection *> connections = peers.values(senderIp);
       
    85     foreach (Connection *connection, connections) {
       
    86         if (connection->peerPort() == senderPort)
       
    87             return true;
       
    88     }
       
    89 
       
    90     return false;
       
    91 }
       
    92 
       
    93 void Client::newConnection(Connection *connection)
       
    94 {
       
    95     connection->setGreetingMessage(peerManager->userName());
       
    96 
       
    97     connect(connection, SIGNAL(error(QAbstractSocket::SocketError)),
       
    98             this, SLOT(connectionError(QAbstractSocket::SocketError)));
       
    99     connect(connection, SIGNAL(disconnected()), this, SLOT(disconnected()));
       
   100     connect(connection, SIGNAL(readyForUse()), this, SLOT(readyForUse()));
       
   101 }
       
   102 
       
   103 void Client::readyForUse()
       
   104 {
       
   105     Connection *connection = qobject_cast<Connection *>(sender());
       
   106     if (!connection || hasConnection(connection->peerAddress(),
       
   107                                      connection->peerPort()))
       
   108         return;
       
   109 
       
   110     connect(connection, SIGNAL(newMessage(const QString &, const QString &)),
       
   111             this, SIGNAL(newMessage(const QString &, const QString &)));
       
   112 
       
   113     peers.insert(connection->peerAddress(), connection);
       
   114     QString nick = connection->name();
       
   115     if (!nick.isEmpty())
       
   116         emit newParticipant(nick);
       
   117 }
       
   118 
       
   119 void Client::disconnected()
       
   120 {
       
   121     if (Connection *connection = qobject_cast<Connection *>(sender()))
       
   122         removeConnection(connection);
       
   123 }
       
   124 
       
   125 void Client::connectionError(QAbstractSocket::SocketError /* socketError */)
       
   126 {
       
   127     if (Connection *connection = qobject_cast<Connection *>(sender()))
       
   128         removeConnection(connection);
       
   129 }
       
   130 
       
   131 void Client::removeConnection(Connection *connection)
       
   132 {
       
   133     if (peers.contains(connection->peerAddress())) {
       
   134         peers.remove(connection->peerAddress());
       
   135         QString nick = connection->name();
       
   136         if (!nick.isEmpty())
       
   137             emit participantLeft(nick);
       
   138     }
       
   139     connection->deleteLater();
       
   140 }