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/**
* @file BobinkNode.cpp
* @brief QML component representing a single OPC UA node.
*/
#include "BobinkNode.h"
#include "BobinkClient.h"
#include <QOpcUaClient>
#include <QOpcUaMonitoringParameters>
static constexpr double DEFAULT_PUBLISHING_INTERVAL = 250.0; // ms
/* ------------------------------------------------------------------ */
/* Construction / destruction */
/* ------------------------------------------------------------------ */
BobinkNode::BobinkNode (QQuickItem *parent) : QQuickItem (parent) {}
BobinkNode::~BobinkNode () { stopMonitoring (); }
/* ------------------------------------------------------------------ */
/* Properties */
/* ------------------------------------------------------------------ */
QString
BobinkNode::nodeId () const
{
return m_nodeId;
}
void
BobinkNode::setNodeId (const QString &id)
{
if (m_nodeId == id)
return;
m_nodeId = id;
emit nodeIdChanged ();
if (m_componentComplete && isVisible ())
{
stopMonitoring ();
startMonitoring ();
}
}
QVariant
BobinkNode::value () const
{
return m_value;
}
void
BobinkNode::setValue (const QVariant &value)
{
if (m_opcuaNode)
m_opcuaNode->writeValueAttribute (value);
}
BobinkNode::NodeStatus
BobinkNode::status () const
{
return m_status;
}
QDateTime
BobinkNode::sourceTimestamp () const
{
return m_sourceTimestamp;
}
QDateTime
BobinkNode::serverTimestamp () const
{
return m_serverTimestamp;
}
/* ------------------------------------------------------------------ */
/* readAttribute */
/* ------------------------------------------------------------------ */
void
BobinkNode::readAttribute (const QString &attributeName)
{
if (!m_opcuaNode)
return;
QOpcUa::NodeAttribute attr = attributeFromName (attributeName);
if (attr == QOpcUa::NodeAttribute::None)
return;
m_pendingReads.insert (attr, attributeName);
m_opcuaNode->readAttributes (attr);
}
/* ------------------------------------------------------------------ */
/* QQuickItem lifecycle */
/* ------------------------------------------------------------------ */
void
BobinkNode::componentComplete ()
{
QQuickItem::componentComplete ();
m_componentComplete = true;
auto *client = BobinkClient::instance ();
if (client)
connect (client, &BobinkClient::connectedChanged, this,
&BobinkNode::handleClientConnectedChanged);
if (isVisible ())
startMonitoring ();
}
void
BobinkNode::itemChange (ItemChange change, const ItemChangeData &data)
{
QQuickItem::itemChange (change, data);
if (change == ItemVisibleHasChanged && m_componentComplete)
{
if (data.boolValue)
startMonitoring ();
else
stopMonitoring ();
}
}
/* ------------------------------------------------------------------ */
/* Monitoring lifecycle */
/* ------------------------------------------------------------------ */
void
BobinkNode::startMonitoring ()
{
if (m_opcuaNode || m_nodeId.isEmpty ())
return;
auto *client = BobinkClient::instance ();
if (!client || !client->connected ())
return;
QOpcUaClient *opcua = client->opcuaClient ();
if (!opcua)
return;
m_opcuaNode = opcua->node (m_nodeId);
if (!m_opcuaNode)
return;
connect (m_opcuaNode, &QOpcUaNode::dataChangeOccurred, this,
&BobinkNode::handleDataChange);
connect (m_opcuaNode, &QOpcUaNode::attributeUpdated, this,
&BobinkNode::handleAttributeUpdated);
connect (m_opcuaNode, &QOpcUaNode::attributeWritten, this,
&BobinkNode::handleAttributeWritten);
QOpcUaMonitoringParameters params (DEFAULT_PUBLISHING_INTERVAL);
m_opcuaNode->enableMonitoring (QOpcUa::NodeAttribute::Value, params);
}
void
BobinkNode::stopMonitoring ()
{
if (!m_opcuaNode)
return;
m_pendingReads.clear ();
delete m_opcuaNode;
m_opcuaNode = nullptr;
}
/* ------------------------------------------------------------------ */
/* Signal handlers */
/* ------------------------------------------------------------------ */
void
BobinkNode::handleDataChange (QOpcUa::NodeAttribute attr, const QVariant &val)
{
if (attr != QOpcUa::NodeAttribute::Value)
return;
if (m_value != val)
{
m_value = val;
emit valueChanged ();
}
NodeStatus newStatus = statusFromCode (m_opcuaNode->valueAttributeError ());
if (m_status != newStatus)
{
m_status = newStatus;
emit statusChanged ();
}
QDateTime srcTs
= m_opcuaNode->sourceTimestamp (QOpcUa::NodeAttribute::Value);
if (m_sourceTimestamp != srcTs)
{
m_sourceTimestamp = srcTs;
emit sourceTimestampChanged ();
}
QDateTime srvTs
= m_opcuaNode->serverTimestamp (QOpcUa::NodeAttribute::Value);
if (m_serverTimestamp != srvTs)
{
m_serverTimestamp = srvTs;
emit serverTimestampChanged ();
}
}
void
BobinkNode::handleAttributeUpdated (QOpcUa::NodeAttribute attr,
const QVariant &val)
{
auto it = m_pendingReads.find (attr);
if (it != m_pendingReads.end ())
{
emit attributeRead (it.value (), val);
m_pendingReads.erase (it);
}
}
void
BobinkNode::handleAttributeWritten (QOpcUa::NodeAttribute attr,
QOpcUa::UaStatusCode statusCode)
{
if (attr != QOpcUa::NodeAttribute::Value)
return;
if (statusCode != QOpcUa::UaStatusCode::Good)
emit writeError (QStringLiteral ("Write failed: 0x%1")
.arg (static_cast<quint32> (statusCode), 8, 16,
QLatin1Char ('0')));
}
void
BobinkNode::handleClientConnectedChanged ()
{
auto *client = BobinkClient::instance ();
if (!client)
return;
if (client->connected ())
{
if (m_componentComplete && isVisible ())
startMonitoring ();
}
else
{
stopMonitoring ();
}
}
/* ------------------------------------------------------------------ */
/* Helpers */
/* ------------------------------------------------------------------ */
BobinkNode::NodeStatus
BobinkNode::statusFromCode (QOpcUa::UaStatusCode code)
{
quint32 severity = static_cast<quint32> (code) >> 30;
switch (severity)
{
case 0:
return Good;
case 1:
return Uncertain;
default:
return Bad;
}
}
QOpcUa::NodeAttribute
BobinkNode::attributeFromName (const QString &name)
{
static const QHash<QString, QOpcUa::NodeAttribute> map = {
{ "NodeId", QOpcUa::NodeAttribute::NodeId },
{ "NodeClass", QOpcUa::NodeAttribute::NodeClass },
{ "BrowseName", QOpcUa::NodeAttribute::BrowseName },
{ "DisplayName", QOpcUa::NodeAttribute::DisplayName },
{ "Description", QOpcUa::NodeAttribute::Description },
{ "Value", QOpcUa::NodeAttribute::Value },
{ "DataType", QOpcUa::NodeAttribute::DataType },
{ "ValueRank", QOpcUa::NodeAttribute::ValueRank },
{ "ArrayDimensions", QOpcUa::NodeAttribute::ArrayDimensions },
{ "AccessLevel", QOpcUa::NodeAttribute::AccessLevel },
{ "UserAccessLevel", QOpcUa::NodeAttribute::UserAccessLevel },
{ "MinimumSamplingInterval",
QOpcUa::NodeAttribute::MinimumSamplingInterval },
{ "Historizing", QOpcUa::NodeAttribute::Historizing },
{ "Executable", QOpcUa::NodeAttribute::Executable },
{ "UserExecutable", QOpcUa::NodeAttribute::UserExecutable },
};
return map.value (name, QOpcUa::NodeAttribute::None);
}
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