From f9ef568899a79dd0d319156ef9a96564911f6c0e Mon Sep 17 00:00:00 2001
From: Evan Siroky <evan.siroky@yahoo.com>
Date: Thu, 23 Jan 2020 16:19:02 -0800
Subject: [PATCH] Properly translate transitive itineraries with no
 intermediate stops

Fixes https://github.com/opentripplanner/otp-ui/issues/36
---
 packages/core-utils/src/map.js                | 35 +++++++++++--------
 packages/transitive-overlay/package.json      |  5 +--
 .../src/TransitiveOverlay.story.js            | 31 ++++++++++++++++
 3 files changed, 55 insertions(+), 16 deletions(-)

diff --git a/packages/core-utils/src/map.js b/packages/core-utils/src/map.js
index 60de31504..a7276e47c 100644
--- a/packages/core-utils/src/map.js
+++ b/packages/core-utils/src/map.js
@@ -161,8 +161,10 @@ export function itineraryToTransitive(itin, companies) {
     }
     if (isTransit(leg.mode)) {
       // determine if we have valid inter-stop geometry
-      const hasInterStopGeometry =
-        leg.interStopGeometry &&
+      const hasInterStopGeometry = !!leg.interStopGeometry;
+      const hasIntermediateStopGeomerty =
+        hasInterStopGeometry &&
+        leg.intermediateStops &&
         leg.interStopGeometry.length === leg.intermediateStops.length + 1;
 
       // create leg-specific pattern
@@ -184,18 +186,21 @@ export function itineraryToTransitive(itin, companies) {
       pattern.stops.push({ stop_id: leg.from.stopId });
 
       // add intermediate stops to stops dictionary and pattern object
-      leg.intermediateStops.forEach((stop, i) => {
-        stops[stop.stopId] = {
-          stop_id: stop.stopId,
-          stop_name: stop.name,
-          stop_lat: stop.lat,
-          stop_lon: stop.lon
-        };
-        pattern.stops.push({
-          stop_id: stop.stopId,
-          geometry: hasInterStopGeometry && leg.interStopGeometry[i].points
+      if (leg.intermediateStops) {
+        leg.intermediateStops.forEach((stop, i) => {
+          stops[stop.stopId] = {
+            stop_id: stop.stopId,
+            stop_name: stop.name,
+            stop_lat: stop.lat,
+            stop_lon: stop.lon
+          };
+          pattern.stops.push({
+            stop_id: stop.stopId,
+            geometry:
+              hasIntermediateStopGeomerty && leg.interStopGeometry[i].points
+          });
         });
-      });
+      }
 
       // add 'to' stop to stops dictionary and pattern object
       stops[leg.to.stopId] = {
@@ -231,7 +236,9 @@ export function itineraryToTransitive(itin, companies) {
           {
             pattern_id: ptnId,
             from_stop_index: 0,
-            to_stop_index: leg.intermediateStops.length + 2 - 1
+            to_stop_index: leg.intermediateStops
+              ? leg.intermediateStops.length + 2 - 1
+              : 1
           }
         ]
       });
diff --git a/packages/transitive-overlay/package.json b/packages/transitive-overlay/package.json
index 786b4b1df..d21f7c07f 100644
--- a/packages/transitive-overlay/package.json
+++ b/packages/transitive-overlay/package.json
@@ -17,9 +17,9 @@
   },
   "homepage": "https://github.com/opentripplanner/otp-ui#readme",
   "dependencies": {
+    "@opentripplanner/base-map": "^0.0.11",
     "@opentripplanner/core-utils": "^0.0.11",
     "@opentripplanner/icons": "^0.0.11",
-    "@opentripplanner/base-map": "^0.0.11",
     "lodash.isequal": "^4.5.0",
     "react-leaflet": "^2.6.1",
     "transitive-js": "^0.13.0"
@@ -29,6 +29,7 @@
   },
   "devDependencies": {
     "@opentripplanner/endpoints-overlay": "^0.0.11",
-    "@opentripplanner/itinerary-body": "^0.0.11"
+    "@opentripplanner/itinerary-body": "^0.0.11",
+    "lodash.clonedeep": "^4.5.0"
   }
 }
diff --git a/packages/transitive-overlay/src/TransitiveOverlay.story.js b/packages/transitive-overlay/src/TransitiveOverlay.story.js
index 3db2bd01f..0c51972b5 100644
--- a/packages/transitive-overlay/src/TransitiveOverlay.story.js
+++ b/packages/transitive-overlay/src/TransitiveOverlay.story.js
@@ -1,3 +1,4 @@
+import clone from "lodash.clonedeep";
 import BaseMap from "@opentripplanner/base-map";
 import { itineraryToTransitive } from "@opentripplanner/core-utils/lib/map";
 import EndpointsOverlay from "@opentripplanner/endpoints-overlay";
@@ -25,6 +26,12 @@ const walkOnlyItinerary = require("@opentripplanner/itinerary-body/src/__mocks__
 const walkTransitWalkItinerary = require("@opentripplanner/itinerary-body/src/__mocks__/itineraries/walk-transit-walk.json");
 const walkTransitWalkTransitWalkItinerary = require("@opentripplanner/itinerary-body/src/__mocks__/itineraries/walk-transit-walk-transit-walk.json");
 
+const walkInterlinedTransitItineraryNoIntermediateStops = clone(
+  walkInterlinedTransitItinerary
+);
+delete walkInterlinedTransitItineraryNoIntermediateStops.legs[1]
+  .intermediateStops;
+
 const companies = [
   {
     id: "RAZOR",
@@ -130,6 +137,30 @@ storiesOf("TransitiveOverlay", module)
       />
     </BaseMap>
   ))
+  .add(
+    "TransitiveOverlay with walk-interlined-transit itinerary with no intermediate stops",
+    () => (
+      <BaseMap center={[45.511841, -122.679302]} zoom={14}>
+        <EndpointsOverlay
+          fromLocation={getFromLocation(
+            walkInterlinedTransitItineraryNoIntermediateStops
+          )}
+          setLocation={setLocation}
+          toLocation={getToLocation(
+            walkInterlinedTransitItineraryNoIntermediateStops
+          )}
+          visible
+        />
+        <TransitiveOverlay
+          transitiveData={itineraryToTransitive(
+            walkInterlinedTransitItineraryNoIntermediateStops,
+            companies
+          )}
+          visible
+        />
+      </BaseMap>
+    )
+  )
   .add("TransitiveOverlay with walk-transit-transfer itinerary", () => (
     <BaseMap center={[45.505841, -122.631302]} zoom={14}>
       <EndpointsOverlay