From 9c78a2e931a350f791e01d1aac1b0cab4d873323 Mon Sep 17 00:00:00 2001
From: Sebastian Hugentobler <sebastian@vanwa.ch>
Date: Wed, 16 Jun 2021 10:29:25 +0200
Subject: [PATCH] add wapoints to gpx file

---
 background.js | 39 +++++++++++++++++++++++++++++++++------
 1 file changed, 33 insertions(+), 6 deletions(-)

diff --git a/background.js b/background.js
index 75da0bd..7d624fd 100644
--- a/background.js
+++ b/background.js
@@ -1,7 +1,7 @@
 /* This Source Code Form is subject to the terms of the Mozilla Public
  * License, v. 2.0. If a copy of the MPL was not distributed with this
  * file, You can obtain one at https://mozilla.org/MPL/2.0/. */
- 
+
 let gpxTrack = null;
 
 /**
@@ -13,9 +13,9 @@ let gpxTrack = null;
  * (https://www.swisstopo.admin.ch/en/knowledge-facts/surveying-geodesy/reference-systems/map-projections.html).
  * 
  * @param {*} point Array of Swiss projection coordinates, position 0 is E and 1 is N.
- * @returns Track point xml node for gpx.
+ * @returns Calculated lat and lon.
  */
-function toTrackPoint(point) {
+function toWGS84(point) {
     // convert LV95 into the civilian system
     let y_aux = (point[0] - 2600000)/1000000;
 	let x_aux = (point[1] - 1200000)/1000000;
@@ -28,7 +28,7 @@ function toTrackPoint(point) {
 			0.0447	 * Math.pow(y_aux, 2) * x_aux -
 			0.0140	 * Math.pow(x_aux, 3);
 
-    let lng = 2.6779094 +
+    let lon = 2.6779094 +
 			4.728982 * y_aux +
 			0.791484 * y_aux * x_aux +
 			0.1306	 * y_aux * Math.pow(x_aux, 2) -
@@ -36,9 +36,34 @@ function toTrackPoint(point) {
 
 	// unit 10000" to 1" and seconds to degrees (dec)
     lat = lat * 100 / 36;
-	lng = lng * 100 / 36;
+	lon = lon * 100 / 36;
 
-    return `<trkpt lat="${lat}" lon="${lng}"/>`;
+    return {lat: lat, lon: lon};
+}
+
+/**
+ * Get the gpx trackpoint representation of a Swiss projection coordinate point.
+ * 
+ * @param {*} point Array of Swiss projection coordinates, position 0 is E and 1 is N.
+ * @returns Track point xml node for gpx.
+ */
+ function toTrackPoint(point) {
+    let wgs84Point = toWGS84(point);
+    return `<trkpt lat="${wgs84Point.lat}" lon="${wgs84Point.lon}"/>`;
+}
+
+/**
+ * Get the gpx waypoint representation of a route portal point.
+ * 
+ * @returns Way point xml node for gpx.
+ */
+ function toWayPoint(point) {
+    let wgs84Point = toWGS84(point.geom.coordinates);
+    return `
+    <wpt lat="${wgs84Point.lat}" lon="${wgs84Point.lon}">
+        <ele>${point.altitude}</ele>
+        <name>${point.display_name}</name>
+    </wpt>`;
 }
 
 /**
@@ -69,6 +94,8 @@ function toGpx(geoJson) {
         xsi:schemaLocation="http://www.topografix.com/GPX/1/0 http://www.topografix.com/GPX/1/0/gpx.xsd"
         version="1.0"
         creator="SAC-Tourenportal GPX Downloader">
+      ${toWayPoint(geoJson.departure_point)}
+      ${toWayPoint(geoJson.destination_poi)}
       <trk>
         <name>Track ${routeTitle}</name>
         <trkseg>