kopia lustrzana https://github.com/f4exb/sdrangel
327 wiersze
14 KiB
C++
327 wiersze
14 KiB
C++
///////////////////////////////////////////////////////////////////////////////////
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// Copyright (C) 2024 Jon Beniston, M7RCE <jon@beniston.com> //
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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 as version 3 of the License, or //
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// (at your option) any later version. //
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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 V3 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 <http://www.gnu.org/licenses/>. //
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///////////////////////////////////////////////////////////////////////////////////
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#include "nasaglobalimagery.h"
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#include <QDebug>
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#include <QUrl>
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#include <QUrlQuery>
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#include <QNetworkReply>
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#include <QXmlStreamReader>
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#include <QNetworkDiskCache>
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#include <QJsonDocument>
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#include <QJsonObject>
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NASAGlobalImagery::NASAGlobalImagery()
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{
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m_networkManager = new QNetworkAccessManager();
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QObject::connect(m_networkManager, &QNetworkAccessManager::finished, this, &NASAGlobalImagery::handleReply);
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QStringList locations = QStandardPaths::standardLocations(QStandardPaths::AppDataLocation);
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QDir writeableDir(locations[0]);
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if (!writeableDir.mkpath(QStringLiteral("cache") + QDir::separator() + QStringLiteral("nasaglobalimagery"))) {
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qDebug() << "Failed to create cache/nasaglobalimagery";
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}
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m_cache = new QNetworkDiskCache();
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m_cache->setCacheDirectory(locations[0] + QDir::separator() + QStringLiteral("cache") + QDir::separator() + QStringLiteral("nasaglobalimagery"));
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m_cache->setMaximumCacheSize(100000000);
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m_networkManager->setCache(m_cache);
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}
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NASAGlobalImagery::~NASAGlobalImagery()
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{
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QObject::disconnect(m_networkManager, &QNetworkAccessManager::finished, this, &NASAGlobalImagery::handleReply);
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delete m_networkManager;
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}
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void NASAGlobalImagery::getData()
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{
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QUrl url(QString("https://gibs.earthdata.nasa.gov/wmts/epsg3857/best/1.0.0/WMTSCapabilities.xml"));
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m_networkManager->get(QNetworkRequest(url));
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}
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void NASAGlobalImagery::getMetaData()
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{
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QUrl url(QString("https://worldview.earthdata.nasa.gov/config/wv.json"));
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m_networkManager->get(QNetworkRequest(url));
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}
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void NASAGlobalImagery::handleReply(QNetworkReply* reply)
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{
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if (reply)
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{
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if (!reply->error())
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{
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QString url = reply->url().toEncoded().constData();
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QByteArray bytes = reply->readAll();
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if (url.endsWith(".xml")) {
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handleXML(bytes);
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} else if (url.endsWith(".svg")) {
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handleSVG(url, bytes);
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} else if (url.endsWith(".json")) {
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handleJSON(bytes);
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} else if (url.endsWith(".html")) {
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handleHTML(url, bytes);
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} else {
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qDebug() << "NASAGlobalImagery::handleReply: unexpected URL: " << url;
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}
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}
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else
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{
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qDebug() << "NASAGlobalImagery::handleReply: error: " << reply->error();
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}
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reply->deleteLater();
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}
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else
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{
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qDebug() << "NASAGlobalImagery::handleReply: reply is null";
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}
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}
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void NASAGlobalImagery::handleXML(const QByteArray& bytes)
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{
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QXmlStreamReader xmlReader(bytes);
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QList<DataSet> dataSets;
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while (!xmlReader.atEnd() && !xmlReader.hasError())
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{
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while (xmlReader.readNextStartElement())
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{
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if (xmlReader.name() == QLatin1String("Capabilities"))
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{
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while(xmlReader.readNextStartElement())
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{
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if (xmlReader.name() == QLatin1String("Contents"))
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{
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while(xmlReader.readNextStartElement())
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{
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if (xmlReader.name() == QLatin1String("Layer"))
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{
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QString identifier;
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QString colorMap;
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QList<Legend> legends;
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QString tileMatrixSet;
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QStringList urls;
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QString format;
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QString defaultDateTime;
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QStringList dates;
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while(xmlReader.readNextStartElement())
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{
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if (xmlReader.name() == QLatin1String("Identifier"))
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{
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identifier = xmlReader.readElementText();
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}
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else if (xmlReader.name() == QLatin1String("TileMatrixSetLink"))
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{
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while(xmlReader.readNextStartElement())
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{
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if (xmlReader.name() == QLatin1String("TileMatrixSet"))
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{
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tileMatrixSet = xmlReader.readElementText();
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}
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else
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{
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xmlReader.skipCurrentElement();
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}
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}
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}
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else if (xmlReader.name() == QLatin1String("Style"))
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{
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while(xmlReader.readNextStartElement())
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{
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if (xmlReader.name() == QLatin1String("LegendURL"))
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{
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Legend legend;
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legend.m_url = xmlReader.attributes().value("xlink:href").toString();
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legend.m_width = (int)xmlReader.attributes().value("width").toFloat();
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legend.m_height = (int)xmlReader.attributes().value("height").toFloat();
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//qDebug() << legend.m_url << legend.m_width << legend.m_height;
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legends.append(legend);
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xmlReader.skipCurrentElement();
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}
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else
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{
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xmlReader.skipCurrentElement();
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}
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}
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}
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else if (xmlReader.name() == QLatin1String("Metadata"))
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{
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colorMap = xmlReader.attributes().value("xlink:href").toString();
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xmlReader.skipCurrentElement();
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}
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else if (xmlReader.name() == QLatin1String("Format"))
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{
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format = xmlReader.readElementText();
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}
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else if (xmlReader.name() == QLatin1String("ResourceURL"))
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{
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QString url = xmlReader.attributes().value("template").toString();
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if (!url.isEmpty()) {
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urls.append(url);
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}
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xmlReader.skipCurrentElement();
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}
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else if (xmlReader.name() == QLatin1String("Dimension"))
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{
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while(xmlReader.readNextStartElement())
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{
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if (xmlReader.name() == QLatin1String("Default"))
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{
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defaultDateTime = xmlReader.readElementText();
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}
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else if (xmlReader.name() == QLatin1String("Value"))
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{
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dates.append(xmlReader.readElementText());
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}
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else
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{
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xmlReader.skipCurrentElement();
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}
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}
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}
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else
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{
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xmlReader.skipCurrentElement();
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}
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}
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// Some layers are <Format>application/vnd.mapbox-vector-tile</Format>
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if (!identifier.isEmpty() && !tileMatrixSet.isEmpty() && ((format == "image/png") || (format == "image/jpeg")))
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{
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DataSet dataSet;
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dataSet.m_identifier = identifier;
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dataSet.m_legends = legends;
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dataSet.m_tileMatrixSet = tileMatrixSet;
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dataSet.m_format = format;
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dataSet.m_defaultDateTime = defaultDateTime;
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dataSet.m_dates = dates;
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dataSets.append(dataSet);
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//qDebug() << "Adding layer" << identifier << colorMap << legends << tileMatrixSet;
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}
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}
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else
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{
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xmlReader.skipCurrentElement();
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}
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}
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}
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else if (xmlReader.name() == QLatin1String("ServiceMetadataURL"))
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{
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// Empty?
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}
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else
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{
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xmlReader.skipCurrentElement();
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}
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}
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}
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else
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{
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xmlReader.skipCurrentElement();
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}
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}
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}
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// Ignore "Premature end of document." here even if ok
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if (!xmlReader.atEnd() && xmlReader.hasError())
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{
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qDebug() << "NASAGlobalImagery::handleReply: Error parsing XML: " << xmlReader.errorString();
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}
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emit dataUpdated(dataSets);
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}
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void NASAGlobalImagery::downloadLegend(const Legend& legend)
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{
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QUrl url(legend.m_url);
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m_networkManager->get(QNetworkRequest(url));
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}
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void NASAGlobalImagery::downloadHTML(const QString& urlString)
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{
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QUrl url(urlString);
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m_networkManager->get(QNetworkRequest(url));
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}
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void NASAGlobalImagery::handleSVG(const QString& url, const QByteArray& bytes)
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{
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emit legendAvailable(url, bytes);
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}
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void NASAGlobalImagery::handleJSON(const QByteArray& bytes)
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{
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MetaData metaData;
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QJsonDocument document = QJsonDocument::fromJson(bytes);
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if (document.isObject())
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{
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QJsonObject obj = document.object();
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if (obj.contains(QStringLiteral("layers")))
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{
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for (const auto& oRef : obj.value(QStringLiteral("layers")).toObject())
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{
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Layer layer;
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QJsonObject o = oRef.toObject();
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if (o.contains(QStringLiteral("id"))) {
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layer.m_identifier = o.value(QStringLiteral("id")).toString();
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}
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if (o.contains(QStringLiteral("title"))) {
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layer.m_title = o.value(QStringLiteral("title")).toString();
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}
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if (o.contains(QStringLiteral("subtitle"))) {
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layer.m_subtitle = o.value(QStringLiteral("subtitle")).toString();
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}
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if (o.contains(QStringLiteral("description"))) {
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layer.m_descriptionURL = "https://worldview.earthdata.nasa.gov/config/metadata/layers/" + o.value(QStringLiteral("description")).toString() + ".html";
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}
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if (o.contains(QStringLiteral("startDate"))) {
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layer.m_startDate = QDateTime::fromString(o.value(QStringLiteral("startDate")).toString(), Qt::ISODate);
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}
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if (o.contains(QStringLiteral("endDate"))) {
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layer.m_endDate = QDateTime::fromString(o.value(QStringLiteral("endDate")).toString(), Qt::ISODate);
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}
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if (o.contains(QStringLiteral("ongoing"))) {
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layer.m_ongoing = o.value(QStringLiteral("ongoing")).toBool();
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}
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if (o.contains(QStringLiteral("layerPeriod"))) {
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layer.m_layerPeriod = o.value(QStringLiteral("layerPeriod")).toString();
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}
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if (o.contains(QStringLiteral("layergroup"))) {
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layer.m_layerGroup = o.value(QStringLiteral("layergroup")).toString();
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}
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if (!layer.m_identifier.isEmpty()) {
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metaData.m_layers.insert(layer.m_identifier, layer);
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}
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}
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}
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}
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emit metaDataUpdated(metaData);
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}
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void NASAGlobalImagery::handleHTML(const QString& url, const QByteArray& bytes)
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{
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emit htmlAvailable(url, bytes);
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}
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