chatserver.cpp Example File | Qt WebChannel 5.6

Qt 5.6 | Qt WebChannel | Qt WebChannel ChatServer Example | chatserver.cpp Example File

Qt 5.6.3 Reference Documentation

# chatserver.cpp Example File

chatserver-cpp/chatserver.cpp

      /****************************************************************************
      **
      ** Copyright (C) 2014 Klarälvdalens Datakonsult AB, a KDAB Group company, info@kdab.com, author Milian Wolff <milian.wolff@kdab.com>
      ** Contact: http://www.qt.io/licensing/
      **
      ** This file is part of the QtWebChannel module of the Qt Toolkit.
      **
      ** $QT_BEGIN_LICENSE:LGPL21$
      ** Commercial License Usage
      ** Licensees holding valid commercial Qt licenses may use this file in
      ** accordance with the commercial license agreement provided with the
      ** Software or, alternatively, in accordance with the terms contained in
      ** a written agreement between you and The Qt Company. For licensing terms
      ** and conditions see http://www.qt.io/terms-conditions. For further
      ** information use the contact form at http://www.qt.io/contact-us.
      **
      ** 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 or version 3 as published by the Free
      ** Software Foundation and appearing in the file LICENSE.LGPLv21 and
      ** LICENSE.LGPLv3 included in the packaging of this file. Please review the
      ** following information to ensure the GNU Lesser General Public License
      ** requirements will be met: https://www.gnu.org/licenses/lgpl.html and
      ** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
      **
      ** As a special exception, The Qt Company gives you certain additional
      ** rights. These rights are described in The Qt Company LGPL Exception
      ** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
      **
      ** $QT_END_LICENSE$
      **
      ****************************************************************************/

      #include "chatserver.h"

      #include <QtCore/QDebug>
      #include <QTimer>
      #include <QTime>

      ChatServer::ChatServer(QObject *parent)
          : QObject(parent)
      {
          QTimer* t = new QTimer(this);
          connect(t, SIGNAL(timeout()), this, SLOT(sendKeepAlive()));
          t->start(10000);

          m_keepAliveCheckTimer = new QTimer(this);
          m_keepAliveCheckTimer->setSingleShot(true);
          m_keepAliveCheckTimer->setInterval(2000);
          connect(m_keepAliveCheckTimer, SIGNAL(timeout()), this, SLOT(checkKeepAliveResponses()));
      }

      ChatServer::~ChatServer()
      {}

      bool ChatServer::login(const QString& userName)
      {
          //stop keepAliveCheck, when a new user logged in
          if (m_keepAliveCheckTimer->isActive()) {
              m_keepAliveCheckTimer->stop();
              m_stillAliveUsers.clear();
          }

          if (m_userList.contains(userName)) {
              return false;
          }

          qDebug() << "User logged in:" << userName;
          m_userList.append(userName);
          m_userList.sort();
          emit userListChanged();
          emit userCountChanged();
          return true;
      }

      bool ChatServer::logout(const QString& userName)
      {
          if (!m_userList.contains(userName)) {
              return false;
          } else {
              m_userList.removeAt(m_userList.indexOf(userName));
              emit userListChanged();
              emit userCountChanged();
              return true;
          }
      }

      bool ChatServer::sendMessage(const QString& user, const QString& msg)
      {
          if (m_userList.contains(user)) {
              emit newMessage(QTime::currentTime().toString("HH:mm:ss"), user, msg);
              return true;
          } else {
              return false;
          }
      }

      void ChatServer::sendKeepAlive() {
          emit keepAlive();
          m_keepAliveCheckTimer->start();
      }

      void ChatServer::checkKeepAliveResponses() {
          qDebug() << "Keep Alive Check" << m_stillAliveUsers;
          m_userList = m_stillAliveUsers;
          m_stillAliveUsers.clear();
          m_userList.sort();
          emit userListChanged();
      }

      void ChatServer::keepAliveResponse(const QString& user) {
          m_stillAliveUsers.append(user);
      }

      QStringList ChatServer::userList() const
      {
          return m_userList;
      }