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/**
*
* This file is part of Tulip (https://tulip.labri.fr)
*
* Authors: David Auber and the Tulip development Team
* from LaBRI, University of Bordeaux
*
* Tulip is free software; you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License
* as published by the Free Software Foundation, either version 3
* of the License, or (at your option) any later version.
*
* Tulip is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
* See the GNU General Public License for more details.
*
*/
#include <QEventLoop>
#include <QNetworkAccessManager>
#include <QNetworkRequest>
#include <QNetworkReply>
#include <QUrl>
#include <tulip/TlpQtTools.h>
#include <tulip/YajlFacade.h>
#include "NominatimGeocoder.h"
using namespace std;
using namespace tlp;
class NominatimResultsParser : public YajlParseFacade {
public:
void parseString(string &value) override {
if (_currentKey == "display_name") {
addresses.push_back(value);
} else if (_currentKey == "lat") {
_lat = stod(value);
} else if (_currentKey == "lon") {
_lng = stod(value);
latLngs.emplace_back(_lat, _lng);
}
}
void parseMapKey(string &value) override {
_currentKey = value;
}
vector<string> addresses;
vector<pair<double, double>> latLngs;
private:
string _currentKey;
double _lat;
double _lng;
};
NominatimGeocoder::NominatimGeocoder() {
_networkAccessManager = new QNetworkAccessManager();
}
NominatimGeocoder::~NominatimGeocoder() {
delete _networkAccessManager;
}
vector<NominatimGeocoderResult> NominatimGeocoder::getLatLngForAddress(const string &address) {
QUrl nominatimSearchUrl;
nominatimSearchUrl.setScheme("https");
nominatimSearchUrl.setHost("nominatim.openstreetmap.org");
nominatimSearchUrl.setPath("/search");
nominatimSearchUrl.setQuery("q=" + tlpStringToQString(address) +
"&format=json&dedupe=1&limit=20");
QNetworkRequest request;
request.setUrl(nominatimSearchUrl);
QNetworkReply *reply = _networkAccessManager->get(request);
QEventLoop loop;
QObject::connect(reply, SIGNAL(finished()), &loop, SLOT(quit()));
loop.exec();
QByteArray jsonData = reply->readAll();
NominatimResultsParser nominatimParser;
nominatimParser.parse(reinterpret_cast<const unsigned char *>(jsonData.constData()),
jsonData.size());
unsigned int nbResults = nominatimParser.addresses.size();
vector<NominatimGeocoderResult> ret;
for (unsigned int i = 0; i < nbResults; ++i) {
NominatimGeocoderResult result;
result.address = nominatimParser.addresses[i];
result.latLng = nominatimParser.latLngs[i];
ret.push_back(result);
}
return ret;
}
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