chatserver.h Example File

** Copyright (C) 2014 Klarälvdalens Datakonsult AB, a KDAB Group company,, author Milian Wolff <>
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#ifndef ChatServer_H
#define ChatServer_H

#include <QObject>
#include <QStringList>

class QTimer;

class ChatServer : public QObject

    Q_PROPERTY(QStringList userList READ userList NOTIFY userListChanged)

    explicit ChatServer(QObject *parent = 0);
    virtual ~ChatServer();

    //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();

    void newMessage(QString time, QString user, QString msg);
    void keepAlive();
    void userListChanged();
    void userCountChanged();

    QStringList m_userList;
    QStringList m_stillAliveUsers;
    QTimer* m_keepAliveCheckTimer;

#endif // ChatServer_H

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