qnearfieldtarget.h

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// Copyright (C) 2016 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 QNEARFIELDTARGET_H
#define QNEARFIELDTARGET_H
 
#include <QtCore/QByteArray>
#include <QtCore/QList>
#include <QtCore/QMetaType>
#include <QtCore/QObject>
#include <QtCore/QSharedDataPointer>
#include <QtCore/QVariant>
#include <QtNfc/qtnfcglobal.h>
 
QT_BEGIN_NAMESPACE
 
class QNdefMessage;
class QNearFieldTargetPrivate;
class QNearFieldManagerPrivateImpl;
 
class Q_NFC_EXPORT QNearFieldTarget : public QObject
{
    Q_OBJECT
 
    Q_DECLARE_PRIVATE(QNearFieldTarget)
    friend class QNearFieldManagerPrivateImpl;
 
public:
    enum Type {
        ProprietaryTag,
        NfcTagType1,
        NfcTagType2,
        NfcTagType3,
        NfcTagType4,
        NfcTagType4A,
        NfcTagType4B,
        MifareTag
    };
    Q_ENUM(Type)
 
    enum AccessMethod {
        UnknownAccess = 0x00,
        NdefAccess = 0x01,
        TagTypeSpecificAccess = 0x02,
        AnyAccess = 0xff
    };
    Q_ENUM(AccessMethod)
    Q_DECLARE_FLAGS(AccessMethods, AccessMethod)
 
    enum Error {
        NoError,
        UnknownError,
        UnsupportedError,
        TargetOutOfRangeError,
        NoResponseError,
        ChecksumMismatchError,
        InvalidParametersError,
        ConnectionError,
        NdefReadError,
        NdefWriteError,
        CommandError,
        TimeoutError
    };
    Q_ENUM(Error)
 
    class RequestIdPrivate;
    class Q_NFC_EXPORT RequestId
    {
    public:
        RequestId();
        RequestId(const RequestId &other);
        RequestId(RequestIdPrivate *p);
        ~RequestId();
 
        bool isValid() const;
 
        int refCount() const;
 
        bool operator<(const RequestId &other) const;
        bool operator==(const RequestId &other) const;
        bool operator!=(const RequestId &other) const;
        RequestId &operator=(const RequestId &other);
 
        QSharedDataPointer<RequestIdPrivate> d;
    };
 
    explicit QNearFieldTarget(QObject *parent = nullptr);
    ~QNearFieldTarget();
 
    QByteArray uid() const;
    Type type() const;
    AccessMethods accessMethods() const;
 
    bool disconnect();
 
    // NdefAccess
    bool hasNdefMessage();
    RequestId readNdefMessages();
    RequestId writeNdefMessages(const QList<QNdefMessage> &messages);
 
    // TagTypeSpecificAccess
    int maxCommandLength() const;
    RequestId sendCommand(const QByteArray &command);
 
    bool waitForRequestCompleted(const RequestId &id, int msecs = 5000);
    QVariant requestResponse(const RequestId &id) const;
 
Q_SIGNALS:
    void disconnected();
 
    void ndefMessageRead(const QNdefMessage &message);
 
    void requestCompleted(const QNearFieldTarget::RequestId &id);
 
    void error(QNearFieldTarget::Error error, const QNearFieldTarget::RequestId &id);
 
protected:
    QNearFieldTarget(QNearFieldTargetPrivate *backend, QObject *parent = nullptr);
 
private:
    QNearFieldTargetPrivate *d_ptr;
};
 
Q_DECLARE_OPERATORS_FOR_FLAGS(QNearFieldTarget::AccessMethods)
 
QT_END_NAMESPACE
 
QT_DECL_METATYPE_EXTERN_TAGGED(QNearFieldTarget::RequestId, QNearFieldTarget__RequestId,
                               Q_NFC_EXPORT)
 
#endif // QNEARFIELDTARGET_H