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/* Copyright 2013-2015 MultiMC Contributors
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include "NewsChecker.h"
#include <QByteArray>
#include <QDomDocument>
#include <QDebug>
NewsChecker::NewsChecker(const QString& feedUrl)
{
m_feedUrl = feedUrl;
}
void NewsChecker::reloadNews()
{
// Start a netjob to download the RSS feed and call rssDownloadFinished() when it's done.
if (isLoadingNews())
{
qDebug() << "Ignored request to reload news. Currently reloading already.";
return;
}
qDebug() << "Reloading news.";
NetJob* job = new NetJob("News RSS Feed");
job->addNetAction(ByteArrayDownload::make(m_feedUrl));
QObject::connect(job, &NetJob::succeeded, this, &NewsChecker::rssDownloadFinished);
QObject::connect(job, &NetJob::failed, this, &NewsChecker::rssDownloadFailed);
m_newsNetJob.reset(job);
job->start();
}
void NewsChecker::rssDownloadFinished()
{
// Parse the XML file and process the RSS feed entries.
qDebug() << "Finished loading RSS feed.";
QByteArray data;
{
ByteArrayDownloadPtr dl = std::dynamic_pointer_cast<ByteArrayDownload>(m_newsNetJob->first());
data = dl->m_data;
m_newsNetJob.reset();
}
QDomDocument doc;
{
// Stuff to store error info in.
QString errorMsg = "Unknown error.";
int errorLine = -1;
int errorCol = -1;
// Parse the XML.
if (!doc.setContent(data, false, &errorMsg, &errorLine, &errorCol))
{
QString fullErrorMsg = QString("Error parsing RSS feed XML. %s at %d:%d.").arg(errorMsg, errorLine, errorCol);
fail(fullErrorMsg);
return;
}
}
// If the parsing succeeded, read it.
QDomNodeList items = doc.elementsByTagName("item");
m_newsEntries.clear();
for (int i = 0; i < items.length(); i++)
{
QDomElement element = items.at(i).toElement();
NewsEntryPtr entry;
entry.reset(new NewsEntry());
QString errorMsg = "An unknown error occurred.";
if (NewsEntry::fromXmlElement(element, entry.get(), &errorMsg))
{
qDebug() << "Loaded news entry" << entry->title;
m_newsEntries.append(entry);
}
else
{
qWarning() << "Failed to load news entry at index" << i << ":" << errorMsg;
}
}
succeed();
}
void NewsChecker::rssDownloadFailed(QString reason)
{
// Set an error message and fail.
fail(tr("Failed to load news RSS feed:\n%1").arg(reason));
}
QList<NewsEntryPtr> NewsChecker::getNewsEntries() const
{
return m_newsEntries;
}
bool NewsChecker::isLoadingNews() const
{
return m_newsNetJob.get() != nullptr;
}
QString NewsChecker::getLastLoadErrorMsg() const
{
return m_lastLoadError;
}
void NewsChecker::succeed()
{
m_lastLoadError = "";
qDebug() << "News loading succeeded.";
m_newsNetJob.reset();
emit newsLoaded();
}
void NewsChecker::fail(const QString& errorMsg)
{
m_lastLoadError = errorMsg;
qDebug() << "Failed to load news:" << errorMsg;
m_newsNetJob.reset();
emit newsLoadingFailed(errorMsg);
}
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