[gnome-maps/wip/mlundblad/otp-router-url-param] openTripPlanner: Use current locale

[Marcus Lundblad <mlundblad src gnome org>]

commit a1fa222a9504585ff92c22590aebdc00ec0405c7
Author: Marcus Lundblad <ml update uu se>
Date:   Tue Oct 1 22:29:06 2019 +0200

    openTripPlanner: Use current locale
    
    Set current language in the request
    as the "locale" parameter.

 src/transitplugins/openTripPlanner.js | 12 +++++++++++-
 1 file changed, 11 insertions(+), 1 deletion(-)
---
diff --git a/src/transitplugins/openTripPlanner.js b/src/transitplugins/openTripPlanner.js
index c8c0ad6..d11b67f 100644
--- a/src/transitplugins/openTripPlanner.js
+++ b/src/transitplugins/openTripPlanner.js
@@ -117,9 +117,17 @@ var OpenTripPlanner = class OpenTripPlanner {
         this._query = Application.routeQuery;
         this._baseUrl = params.baseUrl;
         this._router = params.router || 'default';
+        this._routerUrl = params.routerUrl || null;
         this._onlyTransitData = params.onlyTransitData || false;
         this._walkingRoutes = [];
         this._extendPrevious = false;
+        this._language = Utils.getLanguage();
+
+        if (!this._baseUrl && !this._routerUrl)
+            throw new Error('must specify either baseUrl or routerUrl as an argument');
+
+        if (this._baseUrl && this._routerUrl)
+            throw new Error('can not specify both baseUrl and routerUrl as arguments');
     }
 
     get plan() {
@@ -141,7 +149,8 @@ var OpenTripPlanner = class OpenTripPlanner {
     }
 
     _getRouterUrl() {
-        return this._baseUrl + '/routers/' + this._router;
+        return this._routerUrl ? this._routerUrl :
+                                 this._baseUrl + '/routers/' + this._router;
     }
 
     _getMode(routeType) {
@@ -388,6 +397,7 @@ var OpenTripPlanner = class OpenTripPlanner {
     _addCommonParams(params) {
         params.numItineraries = 5;
         params.showIntermediateStops = true;
+        params.locale = this._language;
 
         let time = this._query.time;
         let date = this._query.date;