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/****************************************************************************
**
** Copyright (C) 2018 The Qt Company Ltd.
** Contact: http://www.qt.io/licensing/
**
** This file is part of the Qt OPC UA module.
**
** $QT_BEGIN_LICENSE:LGPL3$
** 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 The Qt Company. For licensing terms
** and conditions see http://www.qt.io/terms-conditions. For further
** information use the contact form at http://www.qt.io/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 3 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPLv3 included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 3 requirements
** will be met: https://www.gnu.org/licenses/lgpl.html.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 2.0 or later as published by the Free
** Software Foundation and appearing in the file LICENSE.GPL included in
** the packaging of this file. Please review the following information to
** ensure the GNU General Public License version 2.0 requirements will be
** met: http://www.gnu.org/licenses/gpl-2.0.html.
**
** $QT_END_LICENSE$
**
****************************************************************************/
#pragma once
#include "opcuareaditem.h"
#include <QJSValue>
#include <QObject>
#include <QOpcUaClient>
#include <QOpcUaAuthenticationInformation>
#include "opcuaendpointdiscovery.h"
#include "opcuaserverdiscovery.h"
QT_BEGIN_NAMESPACE
class QOpcUaReadResult;
class OpcUaConnection : public QObject
{
Q_OBJECT
Q_DISABLE_COPY(OpcUaConnection)
Q_PROPERTY(QStringList availableBackends READ availableBackends NOTIFY availableBackendsChanged)
Q_PROPERTY(bool connected READ connected NOTIFY connectedChanged)
Q_PROPERTY(QString backend READ backend WRITE setBackend NOTIFY backendChanged)
Q_PROPERTY(bool defaultConnection READ defaultConnection WRITE setDefaultConnection NOTIFY defaultConnectionChanged)
Q_PROPERTY(QStringList namespaces READ namespaces NOTIFY namespacesChanged)
Q_PROPERTY(QOpcUaAuthenticationInformation authenticationInformation READ authenticationInformation WRITE setAuthenticationInformation)
Q_PROPERTY(QStringList supportedSecurityPolicies READ supportedSecurityPolicies CONSTANT)
Q_PROPERTY(QJSValue supportedUserTokenTypes READ supportedUserTokenTypes CONSTANT)
Q_PROPERTY(QOpcUaEndpointDescription currentEndpoint READ currentEndpoint)
public:
OpcUaConnection(QObject *parent = nullptr);
~OpcUaConnection();
QStringList availableBackends() const;
bool connected() const;
void setBackend(const QString &name);
QString backend() const;
static OpcUaConnection *defaultConnection();
bool isDefaultConnection() const;
QStringList namespaces() const;
QOpcUaEndpointDescription currentEndpoint() const;
QOpcUaAuthenticationInformation authenticationInformation() const;
Q_INVOKABLE bool readNodeAttributes(const QJSValue &value);
Q_INVOKABLE bool writeNodeAttributes(const QJSValue &value);
QStringList supportedSecurityPolicies() const;
QJSValue supportedUserTokenTypes() const;
public slots:
void connectToEndpoint(const QOpcUaEndpointDescription &endpointDescription);
void disconnectFromEndpoint();
void setDefaultConnection(bool defaultConnection = true);
void setAuthenticationInformation(const QOpcUaAuthenticationInformation &authenticationInformation);
signals:
void availableBackendsChanged();
void connectedChanged();
void backendChanged();
void defaultConnectionChanged();
void namespacesChanged();
void readNodeAttributesFinished(const QVariant &value);
void writeNodeAttributesFinished(const QVariant &value);
private slots:
void clientStateHandler(QOpcUaClient::ClientState state);
void handleReadNodeAttributesFinished(const QVector<QOpcUaReadResult> &results);
void handleWriteNodeAttributesFinished(const QVector<QOpcUaWriteResult> &results);
private:
QOpcUaClient *m_client = nullptr;
bool m_connected = false;
static OpcUaConnection* m_defaultConnection;
friend class OpcUaNode;
friend class OpcUaValueNode;
friend class OpcUaMethodNode;
friend class OpcUaEndpointDiscovery;
friend class OpcUaServerDiscovery;
};
QT_END_NAMESPACE
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