chatserver.cpp Example File

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  ** Copyright (C) 2016 Klarälvdalens Datakonsult AB, a KDAB Group company, info@kdab.com, author Milian Wolff <milian.wolff@kdab.com>
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  #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;
  }