opcuaconnection_p.h

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// Copyright (C) 2018 The Qt Company Ltd.

// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only

// Qt-Security score:significant reason:default

#ifndef QOPCUA_OPCUACONNECTION_P_H

#define QOPCUA_OPCUACONNECTION_P_H

#include <private/opcuareaditem_p.h>

#include <private/opcuaserverdiscovery_p.h>

#include <QJSValue>

#include <QObject>

#include <QOpcUaClient>

#include <QOpcUaAuthenticationInformation>

#include <QtQml/qqml.h>

//

//  W A R N I N G

//  -------------

//

// This file is not part of the Qt API.  It exists purely as an

// implementation detail.  This header file may change from version to

// version without notice, or even be removed.

//

// We mean it.

//

QT_BEGIN_NAMESPACE

class QOpcUaReadResult;

class OpcUaEndpointDiscovery;

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)

    Q_PROPERTY(QOpcUaClient* connection READ connection WRITE setConnection NOTIFY connectionChanged)

    QML_NAMED_ELEMENT(Connection)

    QML_ADDED_IN_VERSION(5, 12)

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;

    QOpcUaClient *connection() const;

public slots:

    void connectToEndpoint(const QOpcUaEndpointDescription &endpointDescription);

    void disconnectFromEndpoint();

    void setDefaultConnection(bool defaultConnection = true);

    void setAuthenticationInformation(const QOpcUaAuthenticationInformation &authenticationInformation);

    void setConnection(QOpcUaClient *client);

signals:

    void availableBackendsChanged();

    void connectedChanged();

    void backendChanged();

    void defaultConnectionChanged();

    void namespacesChanged();

    void readNodeAttributesFinished(const QVariant &value);

    void writeNodeAttributesFinished(const QVariant &value);

    void connectionChanged();

private slots:

    void clientStateHandler(QOpcUaClient::ClientState state);

    void handleReadNodeAttributesFinished(const QList<QOpcUaReadResult> &results);

    void handleWriteNodeAttributesFinished(const QList<QOpcUaWriteResult> &results);

private:

    void removeConnection();

    void setupConnection();

    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

#endif // QOPCUA_OPCUACONNECTION_P_H