148 lines
4.4 KiB
C++
148 lines
4.4 KiB
C++
// SPDX-License-Identifier: GPL-3.0-only
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/*
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* PolyMC - Minecraft Launcher
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* Copyright (C) 2022 Sefa Eyeoglu <contact@scrumplex.net>
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, version 3.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <https://www.gnu.org/licenses/>.
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*
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* This file incorporates work covered by the following copyright and
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* permission notice:
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*
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* Copyright 2013-2021 MultiMC Contributors
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include "NewsChecker.h"
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#include <QByteArray>
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#include <QDomDocument>
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#include <QDebug>
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NewsChecker::NewsChecker(shared_qobject_ptr<QNetworkAccessManager> network, const QString& feedUrl)
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{
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m_network = network;
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m_feedUrl = feedUrl;
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}
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void NewsChecker::reloadNews()
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{
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// Start a netjob to download the RSS feed and call rssDownloadFinished() when it's done.
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if (isLoadingNews())
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{
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qDebug() << "Ignored request to reload news. Currently reloading already.";
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return;
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}
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qDebug() << "Reloading news.";
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NetJob::Ptr job{ new NetJob("News RSS Feed", m_network) };
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job->addNetAction(Net::Download::makeByteArray(m_feedUrl, newsData));
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QObject::connect(job.get(), &NetJob::succeeded, this, &NewsChecker::rssDownloadFinished);
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QObject::connect(job.get(), &NetJob::failed, this, &NewsChecker::rssDownloadFailed);
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m_newsNetJob.reset(job);
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job->start();
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}
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void NewsChecker::rssDownloadFinished()
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{
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// Parse the XML file and process the RSS feed entries.
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qDebug() << "Finished loading RSS feed.";
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m_newsNetJob.reset();
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QDomDocument doc;
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{
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// Stuff to store error info in.
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QString errorMsg = "Unknown error.";
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int errorLine = -1;
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int errorCol = -1;
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// Parse the XML.
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if (!doc.setContent(*newsData, false, &errorMsg, &errorLine, &errorCol)) {
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QString fullErrorMsg = QString("Error parsing RSS feed XML. %1 at %2:%3.").arg(errorMsg).arg(errorLine).arg(errorCol);
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fail(fullErrorMsg);
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newsData->clear();
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return;
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}
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newsData->clear();
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}
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// If the parsing succeeded, read it.
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QDomNodeList items = doc.elementsByTagName("entry");
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m_newsEntries.clear();
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for (int i = 0; i < items.length(); i++) {
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QDomElement element = items.at(i).toElement();
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NewsEntryPtr entry;
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entry.reset(new NewsEntry());
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QString errorMsg = "An unknown error occurred.";
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if (NewsEntry::fromXmlElement(element, entry.get(), &errorMsg)) {
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qDebug() << "Loaded news entry" << entry->title;
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m_newsEntries.append(entry);
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} else {
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qWarning() << "Failed to load news entry at index" << i << ":" << errorMsg;
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}
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}
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succeed();
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}
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void NewsChecker::rssDownloadFailed(QString reason)
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{
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// Set an error message and fail.
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fail(tr("Failed to load news RSS feed:\n%1").arg(reason));
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}
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QList<NewsEntryPtr> NewsChecker::getNewsEntries() const
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{
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return m_newsEntries;
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}
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bool NewsChecker::isLoadingNews() const
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{
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return m_newsNetJob.get() != nullptr;
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}
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QString NewsChecker::getLastLoadErrorMsg() const
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{
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return m_lastLoadError;
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}
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void NewsChecker::succeed()
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{
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m_lastLoadError = "";
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qDebug() << "News loading succeeded.";
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m_newsNetJob.reset();
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emit newsLoaded();
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}
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void NewsChecker::fail(const QString& errorMsg)
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{
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m_lastLoadError = errorMsg;
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qDebug() << "Failed to load news:" << errorMsg;
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m_newsNetJob.reset();
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emit newsLoadingFailed(errorMsg);
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}
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