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// Copyright (C) 2021 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
#include "annotatedurl.h"
#include <QDebug>
#include <QLocale>
#include <QUrl>
#include <QDesktopServices>
#include <QEvent>
#include <QNdefMessage>
#include <QNdefNfcTextRecord>
#include <QNdefNfcUriRecord>
#include <QNdefRecord>
#include <QNearFieldManager>
#include <QNearFieldTarget>
#include <QGridLayout>
#include <QLabel>
AnnotatedUrl::AnnotatedUrl(QObject *parent)
: QObject(parent),
manager(new QNearFieldManager(this))
{
connect(manager, &QNearFieldManager::targetDetected,
this, &AnnotatedUrl::targetDetected);
connect(manager, &QNearFieldManager::targetLost,
this, &AnnotatedUrl::targetLost);
connect(manager, &QNearFieldManager::adapterStateChanged,
this, &AnnotatedUrl::handleAdapterStateChange);
//! [populateFilter]
messageFilter.setOrderMatch(false);
messageFilter.appendRecord<QNdefNfcTextRecord>(1, 100);
messageFilter.appendRecord<QNdefNfcUriRecord>(1, 1);
messageFilter.appendRecord(QNdefRecord::Mime, "", 0, 1);
//! [populateFilter]
}
AnnotatedUrl::~AnnotatedUrl()
{
}
void AnnotatedUrl::startDetection()
{
if (!manager->isEnabled()) {
qWarning() << "NFC not enabled";
emit nfcStateChanged(false);
return;
}
if (manager->startTargetDetection(QNearFieldTarget::NdefAccess))
emit nfcStateChanged(true);
}
void AnnotatedUrl::targetDetected(QNearFieldTarget *target)
{
if (!target)
return;
connect(target, &QNearFieldTarget::ndefMessageRead,
this, &AnnotatedUrl::handlePolledNdefMessage);
connect(target, &QNearFieldTarget::error, this,
[this]() { emit tagError("Tag read error"); });
target->readNdefMessages();
}
void AnnotatedUrl::targetLost(QNearFieldTarget *target)
{
if (target)
target->deleteLater();
}
void AnnotatedUrl::handlePolledNdefMessage(QNdefMessage message)
{
QNearFieldTarget *target = qobject_cast<QNearFieldTarget *>(sender());
handleMessage(message, target);
}
//! [handleAdapterState]
void AnnotatedUrl::handleAdapterStateChange(QNearFieldManager::AdapterState state)
{
if (state == QNearFieldManager::AdapterState::Online) {
startDetection();
} else if (state == QNearFieldManager::AdapterState::Offline) {
manager->stopTargetDetection();
emit nfcStateChanged(false);
}
}
//! [handleAdapterState]
//! [handleMessage 1]
void AnnotatedUrl::handleMessage(const QNdefMessage &message, QNearFieldTarget *target)
{
//! [handleMessage 1]
Q_UNUSED(target);
//! [handleMessage 2]
if (!messageFilter.match(message)) {
emit tagError("Invalid message format");
return;
}
//! [handleMessage 2]
enum {
MatchedNone,
MatchedFirst,
MatchedEnglish,
MatchedLanguage,
MatchedLanguageAndCountry
} bestMatch = MatchedNone;
QLocale defaultLocale;
QString title;
QUrl url;
QPixmap pixmap;
//! [handleMessage 3]
for (const QNdefRecord &record : message) {
if (record.isRecordType<QNdefNfcTextRecord>()) {
QNdefNfcTextRecord textRecord(record);
title = textRecord.text();
QLocale locale(textRecord.locale());
//! [handleMessage 3]
// already found best match
if (bestMatch == MatchedLanguageAndCountry) {
// do nothing
} else if (bestMatch <= MatchedLanguage && locale == defaultLocale) {
bestMatch = MatchedLanguageAndCountry;
} else if (bestMatch <= MatchedEnglish &&
locale.language() == defaultLocale.language()) {
bestMatch = MatchedLanguage;
} else if (bestMatch <= MatchedFirst && locale.language() == QLocale::English) {
bestMatch = MatchedEnglish;
} else if (bestMatch == MatchedNone) {
bestMatch = MatchedFirst;
}
//! [handleMessage 4]
} else if (record.isRecordType<QNdefNfcUriRecord>()) {
QNdefNfcUriRecord uriRecord(record);
url = uriRecord.uri();
} else if (record.typeNameFormat() == QNdefRecord::Mime &&
record.type().startsWith("image/")) {
pixmap = QPixmap::fromImage(QImage::fromData(record.payload()));
}
//! [handleMessage 4]
//! [handleMessage 5]
}
emit annotatedUrl(url, title, pixmap);
}
//! [handleMessage 5]
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