qnearfieldtarget_ios_p.h

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// Copyright (C) 2020 Governikus GmbH & Co. KG
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
 
#ifndef QNEARFIELDTARGET_IOS_P_H
#define QNEARFIELDTARGET_IOS_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 "qnearfieldtarget_p.h"
#include "qnearfieldtarget.h"
 
#include "qndefmessage.h"
 
#include <QQueue>
#include <QTimer>
 
#include <memory>
#include <deque>
 
QT_BEGIN_NAMESPACE
 
class ResponseProvider : public QObject
{
    Q_OBJECT
 
    public:
        void provideResponse(QNearFieldTarget::RequestId requestId, QNearFieldTarget::Error error, QByteArray recvBuffer);
 
    Q_SIGNALS:
        void responseReceived(QNearFieldTarget::RequestId requestId, QNearFieldTarget::Error error, QByteArray recvBuffer);
};
 
struct NfcDeleter
{
    void operator()(void *tag);
};
 
struct NdefOperation
{
    enum Type {
        Read,
        Write
    } type = Read;
 
    QNearFieldTarget::RequestId requestId;
    QNdefMessage message;
};
 
class QNfcNdefNotifier;
 
class QNearFieldTargetPrivateImpl : public QNearFieldTargetPrivate
{
    Q_OBJECT
 
public:
    QNearFieldTargetPrivateImpl(void *tag, QObject *parent = nullptr);
    QNearFieldTargetPrivateImpl(void *sessionDelegate, void *tag, QObject *parent = nullptr);
    ~QNearFieldTargetPrivateImpl() override;
    void invalidate();
 
    QByteArray uid() const override;
    QNearFieldTarget::Type type() const override;
    QNearFieldTarget::AccessMethods accessMethods() const override;
 
    int maxCommandLength() const override;
    QNearFieldTarget::RequestId sendCommand(const QByteArray &command) override;
 
    // NdefAccess
    bool hasNdefMessage() override;
    QNearFieldTarget::RequestId readNdefMessages() override;
    QNearFieldTarget::RequestId writeNdefMessages(const QList<QNdefMessage> &messages) override;
 
 
    bool isAvailable() const;
 
Q_SIGNALS:
    void targetLost(QNearFieldTargetPrivateImpl *target);
 
private:
    std::unique_ptr<void, NfcDeleter> nfcTag;
 
    // Owned by the near field manager.
    void *sessionDelegate = nil;
    // Owned by the session delegate.
    QNfcNdefNotifier *notifier = nullptr;
    bool hasNDEFMessage = false;
 
    bool connected = false;
    bool justConnected = false;
    QTimer targetCheckTimer;
    QNearFieldTarget::RequestId requestInProgress;
    QQueue<std::pair<QNearFieldTarget::RequestId, QByteArray>> queue;
    std::deque<NdefOperation> ndefOperations;
 
    bool connect();
 
    bool isNdefTag() const;
 
private Q_SLOTS:
    void onTargetCheck();
    void onTargetError(QNearFieldTarget::Error error, const QNearFieldTarget::RequestId &id);
    void onExecuteRequest();
    void onResponseReceived(QNearFieldTarget::RequestId requestId, QNearFieldTarget::Error error, QByteArray recvBuffer);
    // NDEF:
    void messageRead(const QNdefMessage &ndefMessage, QNearFieldTarget::RequestId request);
    void messageWritten(QNearFieldTarget::RequestId request);
};
 
QT_END_NAMESPACE
 
#endif // QNEARFIELDTARGET_IOS_P_H