/****************************************************************************
**
** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
** All rights reserved.
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** Copyright (C) 2013 Klarälvdalens Datakonsult AB, a KDAB Group company, info@kdab.com, author Milian Wolff <milian.wolff@kdab.com>
** Contact: http://www.qt-project.org/legal
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** This file is part of the QWebChannel module on Qt labs.
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** No Commercial Usage
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** contained in the Technology Preview License Agreement accompanying
** this package.
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** GNU Lesser General Public License Usage
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** Foundation and appearing in the file LICENSE.LGPL included in the
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****************************************************************************/

#ifndef QTMETAOBJECTPUBLISHER_H
#define QTMETAOBJECTPUBLISHER_H

#include <QObject>
#include <QVariant>

class QWebChannel;

struct QtMetaObjectPublisherPrivate;

class QtMetaObjectPublisher : public QObject
{
    Q_OBJECT
    Q_PROPERTY(QWebChannel *webChannel READ webChannel WRITE setWebChannel NOTIFY webChannelChanged);
    Q_PROPERTY(bool blockUpdates READ blockUpdates WRITE setBlockUpdates NOTIFY blockUpdatesChanged);

public:
    explicit QtMetaObjectPublisher(QObject *parent = 0);
    virtual ~QtMetaObjectPublisher();

    Q_INVOKABLE QVariantMap classInfoForObjects(const QVariantMap &objects) const;
    Q_INVOKABLE QVariantMap classInfoForObject(QObject *object) const;

    /**
     * Register a map of string ID to QObject* objects.
     *
     * The properties, signals and public methods of the QObject are
     * published to the remote client, where an object with the given identifier
     * is constructed.
     *
     * TODO: This must be called, before clients are initialized.
     */
    Q_INVOKABLE void registerObjects(const QVariantMap &objects);

    /**
     * Handle the given WebChannel client request and potentially give a response.
     *
     * @return true if the request was handled, false otherwise.
     */
    Q_INVOKABLE bool handleRequest(const QJsonObject &message);

    QWebChannel *webChannel() const;
    void setWebChannel(QWebChannel *webChannel);

    /**
     * When updates are blocked, no property updates are transmitted to remote clients.
     */
    bool blockUpdates() const;
    void setBlockUpdates(bool block);

    /// TODO: cleanup: rewrite tests in C++ and access PIMPL data from there
    Q_INVOKABLE void bench_ensureUpdatesInitialized();
    Q_INVOKABLE void bench_sendPendingPropertyUpdates();
    Q_INVOKABLE void bench_registerObjects(const QVariantMap &objects);
    Q_INVOKABLE void bench_initializeClients();
    Q_INVOKABLE bool test_clientIsIdle() const;

signals:
    void webChannelChanged(QWebChannel *channel);
    void blockUpdatesChanged(bool block);

protected:
    virtual void timerEvent(QTimerEvent *);

private:
    QScopedPointer<QtMetaObjectPublisherPrivate> d;
    friend struct QtMetaObjectPublisherPrivate;
};

#endif // QTMETAOBJECTPUBLISHER_H