Remove empty trailing routes

app/helpers/index.js

@@ -25,3 +25,10 @@ export const buildUrl = (stops) => {
   }
   return "https://www.google.com/maps/dir/" + stops.join("/") + "/"
 }
+
+export const dropTail = (array) => {
+  while (array.length > 0 && array.slice(-1)[0].length == 0) {
+    array.pop()
+  }
+  return array
+}

app/reducers/index.js

 import * as at from '../actions/actionTypes'
-import { extractStops } from '../helpers'
+import { extractStops, dropTail } from '../helpers'
 
 
 const initialState = {
@@ -12,13 +12,13 @@ const reducer = (state = initialState, action) => {
       return {routes: state.routes.concat([extractStops(action.payload)])}
 
     case at.DELETE_ROUTE:
-      return {routes: state.routes.filter((v, i) => i != action.payload)}
+      return {routes: dropTail(state.routes.filter((v, i) => i != action.payload))}
 
     case at.CLEAR_ROUTE:
-      return {routes: state.routes.map((v, i) => i == action.payload ? [] : v)}
+      return {routes: dropTail(state.routes.map((v, i) => i == action.payload ?  [] : v))}
 
     case at.UPDATE_URL:
-      return {routes: state.routes.map((v, i) => i == action.payload.index ?  extractStops(action.payload.url) : v)}
+      return {routes: dropTail(state.routes.map((v, i) => i == action.payload.index ?  extractStops(action.payload.url) : v))}
 
     default:
       return state