From a32f4c231e678dd02a4728355455547d3d20fe2a Mon Sep 17 00:00:00 2001
From: Holger Jeromin <mailgithub@katur.de>
Date: Sun, 26 Jan 2020 11:01:45 +0100
Subject: [PATCH] Prevent exceptions while reversing directions

---
 app/assets/javascripts/index/directions.js | 12 ++++++++++--
 1 file changed, 10 insertions(+), 2 deletions(-)

diff --git a/app/assets/javascripts/index/directions.js b/app/assets/javascripts/index/directions.js
index 4c39d6781..5f822b472 100644
--- a/app/assets/javascripts/index/directions.js
+++ b/app/assets/javascripts/index/directions.js
@@ -142,12 +142,20 @@ OSM.Directions = function (map) {
 
   $(".directions_form .reverse_directions").on("click", function () {
     var from = endpoints[0].latlng,
-        to = endpoints[1].latlng;
+        to = endpoints[1].latlng,
+        routeFrom = "",
+        routeTo = "";
+    if(from){
+      routeFrom = from.lat + "," + from.lng;
+    }
+    if(to){
+      routeTo = to.lat + "," + to.lng;
+    }
 
     OSM.router.route("/directions?" + querystring.stringify({
       from: $("#route_to").val(),
       to: $("#route_from").val(),
-      route: to.lat + "," + to.lng + ";" + from.lat + "," + from.lng
+      route: routeTo + ";" + routeFrom
     }));
   });
 
-- 
2.43.2