Location service: only store gps fix after certain time or distance

This should be configurable in the preferences at some point.

Signed-off-by: Dirk Hohndel <dirk@hohndel.org>

1 files changed, 18 insertions, 5 deletions

diff --git a/qt-mobile/gpslocation.cpp b/qt-mobile/gpslocation.cpp
index eb0f15292..d9132f28e 100644
--- a/qt-mobile/gpslocation.cpp
+++ b/qt-mobile/gpslocation.cpp
@@ -35,17 +35,30 @@ void GpsLocation::serviceEnable(bool toggle)
 	}
 }
 
+#define MINTIME 600
+#define MINDIST 200
+
 void GpsLocation::newPosition(QGeoPositionInfo pos)
 {
+	time_t lastTime;
+	QGeoCoordinate lastCoord;
 	QString msg("received new position %1");
 	status(qPrintable(msg.arg(pos.coordinate().toString())));
 	geoSettings.beginGroup("locations");
 	int nr = geoSettings.value("count", 0).toInt();
-	geoSettings.setValue("count", nr + 1);
-	geoSettings.setValue(QString("gpsFix%1_time").arg(nr), pos.timestamp().toTime_t());
-	geoSettings.setValue(QString("gpsFix%1_lat").arg(nr), rint(pos.coordinate().latitude() * 1000000));
-	geoSettings.setValue(QString("gpsFix%1_lon").arg(nr), rint(pos.coordinate().longitude() * 1000000));
-	geoSettings.sync();
+	if (nr) {
+		lastCoord.setLatitude(geoSettings.value(QString("gpsFix%1_lat").arg(nr)).toInt() / 1000000.0);
+		lastCoord.setLongitude(geoSettings.value(QString("gpsFix%1_lon").arg(nr)).toInt() / 1000000.0);
+		time_t lastTime = geoSettings.value(QString("gpsFix%1_time").arg(nr)).toULongLong();
+	}
+	// if we have no record stored or if at least 10 minutes have passed or we moved at least 200m
+	if (!nr || pos.timestamp().toTime_t() > lastTime + MINTIME || lastCoord.distanceTo(pos.coordinate()) > MINDIST) {
+		geoSettings.setValue("count", nr + 1);
+		geoSettings.setValue(QString("gpsFix%1_time").arg(nr), pos.timestamp().toTime_t());
+		geoSettings.setValue(QString("gpsFix%1_lat").arg(nr), rint(pos.coordinate().latitude() * 1000000));
+		geoSettings.setValue(QString("gpsFix%1_lon").arg(nr), rint(pos.coordinate().longitude() * 1000000));
+		geoSettings.sync();
+	}
 }
 
 void GpsLocation::updateTimeout()