Implement getting geolocation via geoclue/geocode-glib on Linux

Telegram/SourceFiles/platform/linux/current_geo_location_linux.cpp

@@ -8,17 +8,192 @@ https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
 #include "platform/linux/current_geo_location_linux.h"
 
 #include "core/current_geo_location.h"
+#include "base/platform/linux/base_linux_library.h"
+
+#include <gio/gio.h>
 
 namespace Platform {
+namespace {
+
+typedef struct _GClueSimple GClueSimple;
+typedef struct _GClueLocation GClueLocation;
+typedef struct _GeocodeLocation GeocodeLocation;
+typedef struct _GeocodeReverse GeocodeReverse;
+typedef struct _GeocodePlace GeocodePlace;
+
+typedef enum {
+	GCLUE_ACCURACY_LEVEL_NONE = 0,
+	GCLUE_ACCURACY_LEVEL_COUNTRY = 1,
+	GCLUE_ACCURACY_LEVEL_CITY = 4,
+	GCLUE_ACCURACY_LEVEL_NEIGHBORHOOD = 5,
+	GCLUE_ACCURACY_LEVEL_STREET = 6,
+	GCLUE_ACCURACY_LEVEL_EXACT = 8,
+} GClueAccuracyLevel;
+
+void (*gclue_simple_new)(
+	const char *desktop_id,
+	GClueAccuracyLevel accuracy_level,
+	GCancellable *cancellable,
+	GAsyncReadyCallback callback,
+	gpointer user_data);
+
+GClueSimple *(*gclue_simple_new_finish)(GAsyncResult *result, GError **error);
+GClueLocation *(*gclue_simple_get_location)(GClueSimple *simple);
+
+gdouble (*gclue_location_get_latitude)(GClueLocation *loc);
+gdouble (*gclue_location_get_longitude)(GClueLocation *loc);
+
+GeocodeLocation *(*geocode_location_new)(
+	gdouble latitude,
+	gdouble longitude,
+	gdouble accuracy);
+
+GeocodeReverse *(*geocode_reverse_new_for_location)(
+	GeocodeLocation *location);
+
+void (*geocode_reverse_resolve_async)(
+	GeocodeReverse *object,
+	GCancellable *cancellable,
+	GAsyncReadyCallback callback,
+	gpointer user_data);
+
+GeocodePlace *(*geocode_reverse_resolve_finish)(
+	GeocodeReverse *object,
+	GAsyncResult *res,
+	GError **error);
+
+const char *(*geocode_place_get_street_address)(GeocodePlace *place);
+const char *(*geocode_place_get_town)(GeocodePlace *place);
+const char *(*geocode_place_get_country)(GeocodePlace *place);
+
+} // namespace
 
 void ResolveCurrentExactLocation(Fn<void(Core::GeoLocation)> callback) {
-	callback({});
+	static const auto Inited = [] {
+		const auto lib = base::Platform::LoadLibrary(
+			"libgeoclue-2.so.0",
+			RTLD_NODELETE);
+		return lib
+			&& LOAD_LIBRARY_SYMBOL(lib, gclue_simple_new)
+			&& LOAD_LIBRARY_SYMBOL(lib, gclue_simple_new_finish)
+			&& LOAD_LIBRARY_SYMBOL(lib, gclue_simple_get_location)
+			&& LOAD_LIBRARY_SYMBOL(lib, gclue_location_get_latitude)
+			&& LOAD_LIBRARY_SYMBOL(lib, gclue_location_get_longitude);
+	}();
+
+	if (!Inited) {
+		callback({});
+		return;
+	}
+
+	gclue_simple_new(
+		QGuiApplication::desktopFileName().toUtf8().constData(),
+		GCLUE_ACCURACY_LEVEL_EXACT,
+		nullptr,
+		GAsyncReadyCallback(+[](
+				GObject *object,
+				GAsyncResult* res,
+				Fn<void(Core::GeoLocation)> *callback) {
+			const auto callbackGuard = gsl::finally([&] {
+				delete callback;
+			});
+
+			const auto simple = gclue_simple_new_finish(res, nullptr);
+			if (!simple) {
+				(*callback)({});
+				return;
+			}
+
+			const auto simpleGuard = gsl::finally([&] {
+				g_object_unref(simple);
+			});
+
+			const auto location = gclue_simple_get_location(simple);
+
+			(*callback)({
+				.point = {
+					gclue_location_get_latitude(location),
+					gclue_location_get_longitude(location),
+				},
+				.accuracy = Core::GeoLocationAccuracy::Exact,
+			});
+		}),
+		new Fn(callback));
 }
+
 void ResolveLocationAddress(
 		const Core::GeoLocation &location,
 		const QString &language,
 		Fn<void(Core::GeoAddress)> callback) {
-	callback({});
+	static const auto Inited = [] {
+		const auto lib = base::Platform::LoadLibrary(
+			"libgeocode-glib-2.so.0",
+			RTLD_NODELETE) ?: base::Platform::LoadLibrary(
+			"libgeocode-glib.so.0",
+			RTLD_NODELETE);
+		return lib
+			&& LOAD_LIBRARY_SYMBOL(lib, geocode_location_new)
+			&& LOAD_LIBRARY_SYMBOL(lib, geocode_reverse_new_for_location)
+			&& LOAD_LIBRARY_SYMBOL(lib, geocode_reverse_resolve_async)
+			&& LOAD_LIBRARY_SYMBOL(lib, geocode_reverse_resolve_finish)
+			&& LOAD_LIBRARY_SYMBOL(lib, geocode_place_get_street_address)
+			&& LOAD_LIBRARY_SYMBOL(lib, geocode_place_get_town)
+			&& LOAD_LIBRARY_SYMBOL(lib, geocode_place_get_country);
+	}();
+
+	if (!Inited) {
+		callback({});
+		return;
+	}
+
+	geocode_reverse_resolve_async(
+		geocode_reverse_new_for_location(geocode_location_new(
+			location.point.x(),
+			location.point.y(),
+			-1)),
+		nullptr,
+		GAsyncReadyCallback(+[](
+				GeocodeReverse *reverse,
+				GAsyncResult* res,
+				Fn<void(Core::GeoAddress)> *callback) {
+			const auto argsGuard = gsl::finally([&] {
+				delete callback;
+				g_object_unref(reverse);
+			});
+
+			const auto place = geocode_reverse_resolve_finish(
+				reverse,
+				res,
+				nullptr);
+
+			if (!place) {
+				(*callback)({});
+				return;
+			}
+
+			const auto placeGuard = gsl::finally([&] {
+				g_object_unref(place);
+			});
+
+			const auto values = {
+				geocode_place_get_street_address(place),
+				geocode_place_get_town(place),
+				geocode_place_get_country(place),
+			};
+
+			QStringList checked;
+			for (const auto &value : values) {
+				if (value) {
+					const auto qt = QString::fromUtf8(value);
+					if (!qt.isEmpty()) {
+						checked.push_back(qt);
+					}
+				}
+			}
+
+			(*callback)({ .name = checked.join(u", "_q) });
+		}),
+		new Fn(callback));
 }
 
 } // namespace Platform