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+/****************************************************************************
+**
+** Copyright (C) 2014 Klarälvdalens Datakonsult AB, a KDAB Group company, info@kdab.com, author Milian Wolff <milian.wolff@kdab.com>
+** Contact: http://www.qt-project.org/legal
+**
+** 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 Digia. For licensing terms and
+** conditions see http://qt.digia.com/licensing. For further information
+** use the contact form at http://qt.digia.com/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.
+**
+** In addition, as a special exception, Digia gives you certain additional
+** rights. These rights are described in the Digia Qt LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef ChatServer_H
+#define ChatServer_H
+
+#include <QObject>
+#include <QStringList>
+
+QT_BEGIN_NAMESPACE
+
+class QTimer;
+
+class ChatServer : public QObject
+{
+ Q_OBJECT
+
+ Q_PROPERTY(QStringList userList READ userList NOTIFY userListChanged)
+
+public:
+ explicit ChatServer(QObject *parent = 0);
+ virtual ~ChatServer();
+
+public:
+ //a user logs in with the given username
+ Q_INVOKABLE bool login(const QString& userName);
+
+ //the user logs out, will be removed from userlist immediately
+ Q_INVOKABLE bool logout(const QString& userName);
+
+ //a user sends a message to all other users
+ Q_INVOKABLE bool sendMessage(const QString& user, const QString& msg);
+
+ //response of the keep alive signal from a client.
+ // This is used to detect disconnects.
+ Q_INVOKABLE void keepAliveResponse(const QString& user);
+
+ QStringList userList() const;
+
+protected slots:
+ void sendKeepAlive();
+ void checkKeepAliveResponses();
+
+signals:
+ void newMessage(QString time, QString user, QString msg);
+ void keepAlive();
+ void userListChanged();
+ void userCountChanged();
+
+private:
+ QStringList m_userList;
+ QStringList m_stillAliveUsers;
+ QTimer* m_keepAliveCheckTimer;
+};
+
+QT_END_NAMESPACE
+
+#endif // ChatServer_H