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#include "playground.h"
#include <QDebug>
#include <QDomDocument>
#include <QLocale>
#include <QNetworkAccessManager>
#include <QNetworkReply>
#include <QTimer>
#include <QXmlStreamReader>
#include "atomchannel.h"
#include "macros.h"
Playground::Playground()
: m_networkManager{new QNetworkAccessManager}
{
connect(m_networkManager, &QNetworkAccessManager::finished, this, &Playground::onReplyFinished);
}
void Playground::fetchUrl(const QUrl &url)
{
m_networkManager->get(QNetworkRequest{url});
}
void Playground::onReplyFinished(QNetworkReply *reply)
{
// TODO: check for nullptr
reply->deleteLater();
qDebug() << "reply size:" << reply->size();
parseFeed(reply);
}
std::shared_ptr<AtomChannel> Playground::parseFeed(QIODevice *ioDevice)
{
if (!ioDevice) {
qCritical() << "ioDevice is nullptr";
return {};
}
QDomDocument doc;
if (!doc.setContent(ioDevice)) {
qCritical() << "cannot set io device to dom doc";
return {};
}
const auto rssTag = QStringLiteral("rss");
const auto channelTag = QStringLiteral("channel");
const auto titleTag = QStringLiteral("title");
const auto linkTag = QStringLiteral("link");
const auto itemTag = QStringLiteral("item");
const auto documentElement = doc.documentElement();
// const auto channelNode = documentElement.elementsByTagName(rssTag).at(0);
const auto channelNode = documentElement.firstChildElement();
VERIFY_CRIT_RETURN_VAL(!channelNode.isNull(), {});
Channel tmpChannel{channelNode};
qDebug() << tmpChannel;
const auto itemNodes = channelNode.elementsByTagName(itemTag);
for (const auto &itemNode : itemNodes) {
const Item item{itemNode};
qDebug() << item;
}
return {};
// const auto channelNode = rssNode.toElement().elementsByTagName(channelTag).at(0);
// VERIFY_CRIT_RETURN_VAL(!channelNode.isNull(), {});
const auto childNode = [](const QDomNode &parent, const QString &tag) {
return parent.toElement().elementsByTagName(tag).at(0);
};
const auto childNodeText = [childNode](const QDomNode &parent, const QString &tag) {
const auto node = childNode(parent, tag);
VERIFY_RETURN_VAL(!node.isNull(), QString{});
return node.toElement().text();
};
qDebug() << "AZAZA: title:" << childNodeText(channelNode, titleTag);
qDebug() << "AZAZA: link:" << childNodeText(channelNode, linkTag);
QDomNode node{channelNode.firstChildElement()};
while (!node.isNull()) {
const auto element = node.toElement();
if (element.isNull()) {
node = node.nextSibling();
continue;
}
// const auto title = childNodeText(element, titleTag);
node = node.nextSibling();
// qDebug() << "AZAZA: title:" << title;
}
return {};
// TODO: check for nullptr
// TODO: try `QNetworkReply::readyRead` instead of `QNetworkAccessManager::finished`
std::shared_ptr<AtomChannel> channel{};
QXmlStreamReader xmlReader{ioDevice};
while (!xmlReader.atEnd() && !xmlReader.hasError()) {
const auto next = xmlReader.readNext();
// qDebug() << "\tnext:" << next;
switch (next) {
case QXmlStreamReader::TokenType::NoToken:
qDebug() << "NoToken";
break;
case QXmlStreamReader::TokenType::Invalid:
qDebug() << "Invalid";
break;
case QXmlStreamReader::TokenType::StartDocument:
// qDebug() << "StartDocument";
break;
case QXmlStreamReader::TokenType::EndDocument:
// qDebug() << "EndDocument";
break;
case QXmlStreamReader::TokenType::StartElement: {
const auto startElementName = xmlReader.name();
// qDebug() << "StartElement: " << startElementName;
if (startElementName == AtomChannel::xmlTag) {
channel = std::make_shared<AtomChannel>(&xmlReader);
// qDebug() << *channel;
} /* else if (startElementName == itemTag) {
const AtomItem item{&xmlReader};
qDebug() << item;
}*/
break;
}
case QXmlStreamReader::TokenType::EndElement:
// qDebug() << "EndElement: " << xmlReader.name();
break;
case QXmlStreamReader::TokenType::Characters: {
const auto characters = xmlReader.text().toString().simplified();
if (characters.isEmpty())
break;
qDebug() << "Characters";
break;
}
case QXmlStreamReader::TokenType::Comment:
qDebug() << "Comment";
break;
case QXmlStreamReader::TokenType::DTD:
qDebug() << "DTD";
break;
case QXmlStreamReader::TokenType::EntityReference:
qDebug() << "EntityReference";
break;
case QXmlStreamReader::TokenType::ProcessingInstruction:
qDebug() << "ProcessingInstruction";
break;
}
if (xmlReader.hasError()) {
qWarning() << "xml parsing error:" << xmlReader.errorString();
return {};
}
}
return channel;
}
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