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// Copyright (C) 2017 Lorenz Haas
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only
#include "qmqtttopicname.h"
#include <QtCore/QDebug>
QT_BEGIN_NAMESPACE
/*!
\class QMqttTopicName
\inmodule QtMqtt
\reentrant
\ingroup shared
\brief The QMqttTopicName class represents a MQTT topic name.
QMqttTopicName is a thin wrapper around a QString providing an expressive
data type for MQTT topic names. Beside the benefits of having a strong type
preventing unintended misuse, QMqttTopicName provides convenient functions
related to topic names like isValid() or levels().
\sa QMqttTopicFilter
*/
/*!
\fn void QMqttTopicName::swap(QMqttTopicName &other)
Swaps the MQTT topic name \a other with this MQTT topic name. This
operation is very fast and never fails.
*/
class QMqttTopicNamePrivate : public QSharedData
{
public:
QString name;
};
/*!
Creates a new MQTT topic name with the specified \a name.
*/
QMqttTopicName::QMqttTopicName(const QString &name) : d(new QMqttTopicNamePrivate)
{
d->name = name;
}
/*!
Creates a new MQTT topic name with the specified \a name.
*/
QMqttTopicName::QMqttTopicName(const QLatin1String &name) : d(new QMqttTopicNamePrivate)
{
d->name = name;
}
/*!
Creates a new MQTT topic name as a copy of \a name.
*/
QMqttTopicName::QMqttTopicName(const QMqttTopicName &name) : d(name.d)
{
}
/*!
Destroys the QMqttTopicName object.
*/
QMqttTopicName::~QMqttTopicName()
{
}
/*!
Assigns the MQTT topic name \a name to this object, and returns a reference
to the copy.
*/
QMqttTopicName &QMqttTopicName::operator=(const QMqttTopicName &name)
{
d = name.d;
return *this;
}
/*!
Returns the topic name.
*/
QString QMqttTopicName::name() const
{
return d->name;
}
/*!
Sets the topic name to \a name.
*/
void QMqttTopicName::setName(const QString &name)
{
d.detach();
d->name = name;
}
/*!
Returns \c true if the topic name is valid according to the MQTT standard
section 4.7, or \c false otherwise.
*/
bool QMqttTopicName::isValid() const
{
const int bytes = d->name.size();
return bytes > 0 // [MQTT-4.7.3-1]
&& bytes < 65536 // [MQTT-4.7.3-3]
&& !d->name.contains(QLatin1Char('#')) // [MQTT-4.7.1-1]
&& !d->name.contains(QLatin1Char('+')) // [MQTT-4.7.1-1]
&& !d->name.contains(QChar(QChar::Null)); // [MQTT-4.7.3-2]
}
/*!
Returns the total number of topic levels.
*/
int QMqttTopicName::levelCount() const
{
return d->name.isEmpty() ? 0 : d->name.count(QLatin1Char('/')) + 1;
}
/*!
Returns the topic levels.
*/
QStringList QMqttTopicName::levels() const
{
return d->name.split(QLatin1Char('/'), Qt::KeepEmptyParts);
}
/*!
//! friend
\fn bool QMqttTopicName::operator==(const QMqttTopicName &lhs, const QMqttTopicName &rhs)
Returns \c true if the topic names \a lhs and \a rhs are equal,
otherwise returns \c false.
*/
bool operator==(const QMqttTopicName &lhs, const QMqttTopicName &rhs) Q_DECL_NOTHROW
{
return (lhs.d == rhs.d) || (lhs.d->name == rhs.d->name);
}
/*!
//! friend
\fn bool QMqttTopicName::operator!=(const QMqttTopicName &lhs, const QMqttTopicName &rhs)
Returns \c true if the topic names \a lhs and \a rhs are different,
otherwise returns \c false.
*/
/*!
//! friend
\fn bool QMqttTopicName::operator<(const QMqttTopicName &lhs, const QMqttTopicName &rhs)
Returns \c true if the topic name \a lhs is lexically less than the topic
name \a rhs; otherwise returns \c false.
*/
bool operator<(const QMqttTopicName &lhs, const QMqttTopicName &rhs) Q_DECL_NOTHROW
{
return lhs.d->name < rhs.d->name;
}
/*!
\relates QHash
Returns the hash value for \a name. If specified, \a seed is used to
initialize the hash.
*/
size_t qHash(const QMqttTopicName &name, size_t seed) Q_DECL_NOTHROW
{
return qHash(name.d->name, seed);
}
#ifndef QT_NO_DATASTREAM
/*! \relates QMqttTopicName
Writes the topic name \a name to the stream \a out and returns a reference
to the stream.
\sa{Serializing Qt Data Types}{Format of the QDataStream operators}
*/
QDataStream &operator<<(QDataStream &out, const QMqttTopicName &name)
{
out << name.name();
return out;
}
/*! \relates QMqttTopicName
Reads a topic name into \a name from the stream \a in and returns a
reference to the stream.
\sa{Serializing Qt Data Types}{Format of the QDataStream operators}
*/
QDataStream &operator>>(QDataStream &in, QMqttTopicName &name)
{
QString n;
in >> n;
name.setName(n);
return in;
}
#endif // QT_NO_DATASTREAM
#ifndef QT_NO_DEBUG_STREAM
QDebug operator<<(QDebug d, const QMqttTopicName &name)
{
QDebugStateSaver saver(d);
d.nospace() << "QMqttTopicName(" << name.name() << ')';
return d;
}
#endif
QT_END_NAMESPACE
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