qpcsccard_p.h

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// Copyright (C) 2022 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
 
#ifndef QPCSCCARD_P_H
#define QPCSCCARD_P_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.
//
 
#include "qpcsc_p.h"
#include "qndefmessage.h"
#include "qnearfieldtarget.h"
#include "ndef/qndefaccessfsm_p.h"
 
QT_BEGIN_NAMESPACE
 
class QTimer;
 
class QPcscCard : public QObject
{
    Q_OBJECT
public:
    QPcscCard(SCARDHANDLE handle, DWORD protocol, QObject *parent = nullptr);
    ~QPcscCard();
 
    bool isValid() const { return m_isValid; }
    void invalidate();
 
    bool checkCardPresent();
    Q_INVOKABLE void enableAutodelete();
 
    QByteArray readUid();
    int readMaxInputLength();
 
    bool supportsNdef() const { return m_supportsNdef; }
 
private:
    SCARDHANDLE m_handle;
    SCARD_IO_REQUEST m_ioPci;
    bool m_isValid = true;
    bool m_supportsNdef;
    bool m_autodelete = false;
    // Indicates that an _automatic_ transaction was started
    bool m_inAutoTransaction = false;
    QTimer *m_keepAliveTimer;
 
    std::unique_ptr<QNdefAccessFsm> m_tagDetectionFsm;
 
    enum AutoTransaction { NoAutoTransaction, StartAutoTransaction };
 
    QPcsc::RawCommandResult sendCommand(const QByteArray &command, AutoTransaction autoTransaction);
    void performNdefDetection();
 
    class Transaction
    {
    public:
        Transaction(QPcscCard *card);
        ~Transaction();
 
    private:
        QPcscCard *m_card;
        bool m_initiated = false;
    };
 
public Q_SLOTS:
    void onDisconnectRequest();
    void onTargetDestroyed();
    void onSendCommandRequest(const QNearFieldTarget::RequestId &request,
                              const QByteArray &command);
    void onReadNdefMessagesRequest(const QNearFieldTarget::RequestId &request);
    void onWriteNdefMessagesRequest(const QNearFieldTarget::RequestId &request,
                                    const QList<QNdefMessage> &messages);
 
private Q_SLOTS:
    void onKeepAliveTimeout();
 
Q_SIGNALS:
    void disconnected();
    void invalidated();
 
    void requestCompleted(const QNearFieldTarget::RequestId &request,
                          QNearFieldTarget::Error reason, const QVariant &result);
    void ndefMessageRead(const QNdefMessage &message);
};
 
QT_END_NAMESPACE
 
#endif // QPCSCCARD_P_H