qnearfieldtarget_p.cpp

Go to the documentation of this file.

// Copyright (C) 2017 Governikus GmbH & Co. K
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
 
#include "qnearfieldtarget_p.h"
 
#include <QtCore/QCoreApplication>
#include <QtCore/QElapsedTimer>
#include <QtCore/QPointer>
 
QT_BEGIN_NAMESPACE
 
 
QNearFieldTargetPrivate::QNearFieldTargetPrivate(QObject *parent)
:   QObject(parent)
,   q_ptr(nullptr)
{
}
 
QByteArray QNearFieldTargetPrivate::uid() const
{
    return QByteArray();
}
 
QNearFieldTarget::Type QNearFieldTargetPrivate::type() const
{
    return QNearFieldTarget::Type::ProprietaryTag;
}
 
QNearFieldTarget::AccessMethods QNearFieldTargetPrivate::accessMethods() const
{
    return QNearFieldTarget::AccessMethod::UnknownAccess;
}
 
bool QNearFieldTargetPrivate::disconnect()
{
    return false;
}
 
// NdefAccess
bool QNearFieldTargetPrivate::hasNdefMessage()
{
    return false;
}
 
QNearFieldTarget::RequestId QNearFieldTargetPrivate::readNdefMessages()
{
    const QNearFieldTarget::RequestId id;
    Q_EMIT error(QNearFieldTarget::UnsupportedError, id);
    return id;
}
 
QNearFieldTarget::RequestId
QNearFieldTargetPrivate::writeNdefMessages(const QList<QNdefMessage> &messages)
{
    Q_UNUSED(messages);
 
    const QNearFieldTarget::RequestId id;
    Q_EMIT error(QNearFieldTarget::UnsupportedError, id);
    return id;
}
 
// TagTypeSpecificAccess
int QNearFieldTargetPrivate::maxCommandLength() const
{
    return 0;
}
 
QNearFieldTarget::RequestId QNearFieldTargetPrivate::sendCommand(const QByteArray &command)
{
    Q_UNUSED(command);
 
    const QNearFieldTarget::RequestId id;
    Q_EMIT error(QNearFieldTarget::UnsupportedError, id);
    return id;
}
 
bool QNearFieldTargetPrivate::waitForRequestCompleted(const QNearFieldTarget::RequestId &id,
                                                      int msecs)
{
    QElapsedTimer timer;
    timer.start();
 
    const QPointer<QNearFieldTargetPrivate> weakThis = this;
 
    do {
        if (!weakThis)
            return false;
 
        if (m_decodedResponses.contains(id))
            return true;
        else
            QCoreApplication::processEvents(QEventLoop::WaitForMoreEvents, 1);
    } while (timer.elapsed() <= msecs);
 
    reportError(QNearFieldTarget::TimeoutError, id);
 
    return false;
}
 
QVariant QNearFieldTargetPrivate::requestResponse(const QNearFieldTarget::RequestId &id) const
{
    return m_decodedResponses.value(id);
}
 
void QNearFieldTargetPrivate::setResponseForRequest(const QNearFieldTarget::RequestId &id,
                                                    const QVariant &response,
                                                    bool emitRequestCompleted)
{
    for (auto i = m_decodedResponses.begin(), end = m_decodedResponses.end(); i != end; /* erasing */) {
        // no more external references
        if (i.key().refCount() == 1)
            i = m_decodedResponses.erase(i);
        else
            ++i;
    }
 
    m_decodedResponses.insert(id, response);
 
    if (emitRequestCompleted)
        Q_EMIT requestCompleted(id);
}
 
void QNearFieldTargetPrivate::reportError(QNearFieldTarget::Error error,
                                          const QNearFieldTarget::RequestId &id)
{
    setResponseForRequest(id, QVariant(), false);
    QMetaObject::invokeMethod(this, [this, error, id]() {
        Q_EMIT this->error(error, id);
    }, Qt::QueuedConnection);
}
 
QT_END_NAMESPACE
 
#include "moc_qnearfieldtarget_p.cpp"