Add geolocator.

src/CMakeLists.txt

@@ -158,6 +158,7 @@ set(SOURCES
   internet/digitallyimportedservicebase.cpp
   internet/digitallyimportedsettingspage.cpp
   internet/digitallyimportedurlhandler.cpp
+  internet/geolocator.cpp
   internet/groovesharkradio.cpp
   internet/groovesharksearchplaylisttype.cpp
   internet/groovesharkservice.cpp
@@ -427,6 +428,7 @@ set(HEADERS
   internet/digitallyimportedclient.h
   internet/digitallyimportedservicebase.h
   internet/digitallyimportedsettingspage.h
+  internet/geolocator.h
   internet/groovesharkservice.h
   internet/groovesharksettingspage.h
   internet/groovesharkurlhandler.h

src/internet/geolocator.cpp

@@ -0,0 +1,69 @@
+#include "geolocator.h"
+
+#include <limits>
+
+#include <qjson/parser.h>
+
+#include <QStringList>
+
+#include "core/closure.h"
+
+const char* Geolocator::kUrl = "https://data.clementine-player.org/geolocate";
+
+using std::numeric_limits;
+
+Geolocator::LatLng::LatLng()
+  : lat_e6_(numeric_limits<int>::min()),
+    lng_e6_(numeric_limits<int>::min()) {
+}
+
+Geolocator::LatLng::LatLng(int lat_e6, int lng_e6)
+  : lat_e6_(lat_e6),
+    lng_e6_(lng_e6) {
+}
+
+bool Geolocator::LatLng::IsValid() const {
+  return lat_e6_ != numeric_limits<int>::min() &&
+         lng_e6_ != numeric_limits<int>::min();
+}
+
+Geolocator::Geolocator(QObject* parent)
+  : QObject(parent) {
+}
+
+void Geolocator::Geolocate() {
+  QNetworkRequest req = QNetworkRequest(QUrl(kUrl));
+  QNetworkReply* reply = network_.get(req);
+  NewClosure(reply, SIGNAL(finished()), this, SLOT(RequestFinished()));
+}
+
+void Geolocator::RequestFinished(QNetworkReply* reply) {
+  reply->deleteLater();
+  if (reply->attribute(QNetworkRequest::HttpStatusCodeAttribute) != 200) {
+    emit Finished(LatLng());
+    return;
+  }
+
+  QJson::Parser parser;
+  bool ok = false;
+  QVariant result = parser.parse(reply, &ok);
+  if (!ok) {
+    emit Finished(LatLng());
+    return;
+  }
+
+  QVariantMap map = result.toMap();
+  QString latlng = map["latlng"].toString();
+  QStringList split = latlng.split(",");
+  if (split.length() != 2) {
+    emit Finished(LatLng());
+    return;
+  }
+
+  double lat = split[0].toDouble();
+  double lng = split[1].toDouble();
+
+  emit Finished(
+      LatLng(static_cast<int>(lat * 1e6),
+             static_cast<int>(lng * 1e6)));
+}

src/internet/geolocator.h

@@ -0,0 +1,42 @@
+#ifndef GEOLOCATOR_H
+#define GEOLOCATOR_H
+
+#include <QObject>
+
+#include "core/network.h"
+
+class Geolocator : public QObject {
+  Q_OBJECT
+ public:
+  explicit Geolocator(QObject* parent = 0);
+
+  void Geolocate();
+
+  class LatLng {
+   public:
+    LatLng();
+    LatLng(int lat_e6, int lng_e6);
+
+    int lat_e6() const { return lat_e6_; }
+    int lng_e6() const { return lng_e6_; }
+
+    bool IsValid() const;
+
+   private:
+    const int lat_e6_;
+    const int lng_e6_;
+  };
+
+ signals:
+  void Finished(LatLng latlng);
+
+ private slots:
+  void RequestFinished(QNetworkReply* reply);
+
+ private:
+  NetworkAccessManager network_;
+
+  static const char* kUrl;
+};
+
+#endif  // GEOLOCATOR_H