From 6194519b187b9ef24bd9d60df40d6d68d39c35b9 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Martin=20T=C5=AFma?= <tumic@cbox.cz>
Date: Wed, 8 Aug 2018 20:18:08 +0200
Subject: [PATCH] Added support for geocaching.com LOC files

---
 gpxsee.pro             |  6 ++--
 src/data/data.cpp      |  8 +++--
 src/data/locparser.cpp | 77 ++++++++++++++++++++++++++++++++++++++++++
 src/data/locparser.h   | 23 +++++++++++++
 4 files changed, 110 insertions(+), 4 deletions(-)
 create mode 100644 src/data/locparser.cpp
 create mode 100644 src/data/locparser.h

diff --git a/gpxsee.pro b/gpxsee.pro
index 5f92c547..3e106777 100644
--- a/gpxsee.pro
+++ b/gpxsee.pro
@@ -137,7 +137,8 @@ HEADERS += src/config.h \
     src/map/mercator.h \
     src/map/jnxmap.h \
     src/map/krovak.h \
-    src/GUI/kv.h
+    src/GUI/kv.h \
+    src/data/locparser.h
 SOURCES += src/main.cpp \
     src/common/coordinates.cpp \
     src/common/rectc.cpp \
@@ -238,7 +239,8 @@ SOURCES += src/main.cpp \
     src/map/mercator.cpp \
     src/map/jnxmap.cpp \
     src/map/krovak.cpp \
-    src/map/map.cpp
+    src/map/map.cpp \
+    src/data/locparser.cpp
 
 RESOURCES += gpxsee.qrc
 TRANSLATIONS = lang/gpxsee_cs.ts \
diff --git a/src/data/data.cpp b/src/data/data.cpp
index dd374b6a..b19cdfed 100644
--- a/src/data/data.cpp
+++ b/src/data/data.cpp
@@ -9,6 +9,7 @@
 #include "igcparser.h"
 #include "nmeaparser.h"
 #include "oziparsers.h"
+#include "locparser.h"
 #include "data.h"
 
 
@@ -22,6 +23,7 @@ static NMEAParser nmea;
 static PLTParser plt;
 static WPTParser wpt;
 static RTEParser rte;
+static LOCParser loc;
 
 static QHash<QString, Parser*> parsers()
 {
@@ -37,6 +39,7 @@ static QHash<QString, Parser*> parsers()
 	hash.insert("plt", &plt);
 	hash.insert("wpt", &wpt);
 	hash.insert("rte", &rte);
+	hash.insert("loc", &loc);
 
 	return hash;
 }
@@ -108,10 +111,11 @@ QString Data::formats()
 {
 	return
 	  tr("Supported files")
-	  + " (*.csv *.fit *.gpx *.igc *.kml *.nmea *.plt *.rte *.tcx *.wpt);;"
+	  + " (*.csv *.fit *.gpx *.igc *.kml *.loc *.nmea *.plt *.rte *.tcx *.wpt);;"
 	  + tr("CSV files") + " (*.csv);;" + tr("FIT files") + " (*.fit);;"
 	  + tr("GPX files") + " (*.gpx);;" + tr("IGC files") + " (*.igc);;"
-	  + tr("KML files") + " (*.kml);;" + tr("NMEA files") + " (*.nmea);;"
+	  + tr("KML files") + " (*.kml);;" + tr("LOC files") + " (*.loc);;"
+	  + tr("NMEA files") + " (*.nmea);;"
 	  + tr("OziExplorer files") + " (*.plt *.rte *.wpt);;"
 	  + tr("TCX files") + " (*.tcx);;" + tr("All files") + " (*)";
 }
diff --git a/src/data/locparser.cpp b/src/data/locparser.cpp
new file mode 100644
index 00000000..fb42cf36
--- /dev/null
+++ b/src/data/locparser.cpp
@@ -0,0 +1,77 @@
+#include "locparser.h"
+
+Coordinates LOCParser::coordinates()
+{
+	bool res;
+	qreal lon, lat;
+	const QXmlStreamAttributes &attr = _reader.attributes();
+
+#if QT_VERSION < QT_VERSION_CHECK(5, 0, 0)
+	lon = attr.value("lon").toString().toDouble(&res);
+#else // QT_VERSION < 5
+	lon = attr.value("lon").toDouble(&res);
+#endif // QT_VERSION < 5
+	if (!res || (lon < -180.0 || lon > 180.0)) {
+		_reader.raiseError("Invalid longitude");
+		return Coordinates();
+	}
+#if QT_VERSION < QT_VERSION_CHECK(5, 0, 0)
+	lat = attr.value("lat").toString().toDouble(&res);
+#else // QT_VERSION < 5
+	lat = attr.value("lat").toDouble(&res);
+#endif // QT_VERSION < 5
+	if (!res || (lat < -90.0 || lat > 90.0)) {
+		_reader.raiseError("Invalid latitude");
+		return Coordinates();
+	}
+
+	return Coordinates(lon, lat);
+}
+
+void LOCParser::waypoint(Waypoint &waypoint)
+{
+	while (_reader.readNextStartElement()) {
+		if (_reader.name() == "name") {
+			const QXmlStreamAttributes &attr = _reader.attributes();
+			waypoint.setName(attr.value("id").toString());
+			waypoint.setDescription(_reader.readElementText());
+		} else if (_reader.name() == "coord") {
+			waypoint.setCoordinates(coordinates());
+			_reader.skipCurrentElement();
+		} else
+			_reader.skipCurrentElement();
+	}
+
+	if (waypoint.coordinates().isNull())
+		_reader.raiseError("Missing waypoint coordinates");
+}
+
+void LOCParser::loc(QList<Waypoint> &waypoints)
+{
+	while (_reader.readNextStartElement()) {
+		if (_reader.name() == "waypoint") {
+			waypoints.append(Waypoint());
+			waypoint(waypoints.last());
+		} else
+			_reader.skipCurrentElement();
+	}
+}
+
+bool LOCParser::parse(QFile *file, QList<TrackData> &tracks,
+  QList<RouteData> &routes, QList<Waypoint> &waypoints)
+{
+	Q_UNUSED(tracks);
+	Q_UNUSED(routes);
+
+	_reader.clear();
+	_reader.setDevice(file);
+
+	if (_reader.readNextStartElement()) {
+		if (_reader.name() == "loc")
+			loc(waypoints);
+		else
+			_reader.raiseError("Not a LOC file");
+	}
+
+	return !_reader.error();
+}
diff --git a/src/data/locparser.h b/src/data/locparser.h
new file mode 100644
index 00000000..a7593978
--- /dev/null
+++ b/src/data/locparser.h
@@ -0,0 +1,23 @@
+#ifndef LOCPARSER_H
+#define LOCPARSER_H
+
+#include <QXmlStreamReader>
+#include "parser.h"
+
+class LOCParser : public Parser
+{
+public:
+	bool parse(QFile *file, QList<TrackData> &tracks,
+	  QList<RouteData> &routes, QList<Waypoint> &waypoints);
+	QString errorString() const {return _reader.errorString();}
+	int errorLine() const {return _reader.lineNumber();}
+
+private:
+	void loc(QList<Waypoint> &waypoints);
+	void waypoint(Waypoint &waypoint);
+	Coordinates coordinates();
+
+	QXmlStreamReader _reader;
+};
+
+#endif // LOCPARSER_H