chatserver.h 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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#ifndef CHATSERVER_H
#define CHATSERVER_H
#include <QObject>
#include <QStringList>
class QTimer;
class ChatServer : public QObject
{
    Q_OBJECT
    Q_PROPERTY(QStringList userList READ userList NOTIFY userListChanged)
public:
    explicit ChatServer(QObject *parent = nullptr);
    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;
};
#endif // CHATSERVER_H