From 645c0083efa2c79bb9e958a6d5a09c4b3f4e79e3 Mon Sep 17 00:00:00 2001
From: falcon71 <falcon71.github@gmail.com>
Date: Wed, 23 Oct 2024 18:04:33 +0200
Subject: [PATCH] Fixes #38: The APT 3 page would throw an error for airports
 without runways

---
 kln90b/pages/right/Apt3MapPage.tsx  |  6 +++---
 kln90b/pages/right/Apt3UserPage.tsx | 22 +++++++++++-----------
 2 files changed, 14 insertions(+), 14 deletions(-)

diff --git a/kln90b/pages/right/Apt3MapPage.tsx b/kln90b/pages/right/Apt3MapPage.tsx
index e113a9f..ecaca18 100644
--- a/kln90b/pages/right/Apt3MapPage.tsx
+++ b/kln90b/pages/right/Apt3MapPage.tsx
@@ -1,4 +1,4 @@
-import {AirportFacility, FSComponent, GeoPoint, RunwayUtils, VNode} from '@microsoft/msfs-sdk';
+import {AirportFacility, GeoPoint, RunwayUtils, VNode} from '@microsoft/msfs-sdk';
 import {PageProps, UIElementChildren} from "../Page";
 import {NO_CURSOR_CONTROLLER} from "../CursorController";
 import {Canvas} from "../../controls/Canvas";
@@ -23,7 +23,7 @@ export class Apt3MapPage extends WaypointPage<AirportFacility> {
         super(props);
 
         const facility = unpackFacility(this.facility);
-        if (!facility || isUserWaypoint(facility)) {
+        if (!facility || isUserWaypoint(facility) || facility.runways.length == 0) {
             this.numPages = 0;
         }
 
@@ -43,7 +43,7 @@ export class Apt3MapPage extends WaypointPage<AirportFacility> {
     public changeFacility(fac: string | AirportFacility) {
         super.changeFacility(fac);
         const facility = unpackFacility(this.facility);
-        this.numPages = facility && !isUserWaypoint(facility) ? 1 : 0;
+        this.numPages = facility && !isUserWaypoint(facility) && facility.runways.length > 0 ? 1 : 0;
     }
 
     public getScanlist(): Scanlist {
diff --git a/kln90b/pages/right/Apt3UserPage.tsx b/kln90b/pages/right/Apt3UserPage.tsx
index ba55aa3..ada5cbf 100644
--- a/kln90b/pages/right/Apt3UserPage.tsx
+++ b/kln90b/pages/right/Apt3UserPage.tsx
@@ -38,21 +38,18 @@ export class Apt3UserPage extends WaypointPage<AirportFacility> {
     private ref: NodeReference<HTMLDivElement> = FSComponent.createRef<HTMLDivElement>();
     private isVisible: boolean = false;
 
-
     constructor(props: PageProps) {
         super(props);
 
-
         const facility = unpackFacility(this.facility);
+        const runway = this.getRunway(facility);
 
         this.children = new UIElementChildren<Apt3UserPageTypes>({
-            length: new RunwayLengthEditor(this.props.bus, facility ? this.getRunwayLength(this.getRunway(facility)) : null, this.setRunwayLength.bind(this)),
-            surface: new RunwaySurfaceEditor(this.props.bus, facility ? this.getRunwaySurface(this.getRunway(facility)) : null, this.setRunwaySurface.bind(this)),
+            length: new RunwayLengthEditor(this.props.bus, this.getRunwayLength(runway), this.setRunwayLength.bind(this)),
+            surface: new RunwaySurfaceEditor(this.props.bus, this.getRunwaySurface(runway), this.setRunwaySurface.bind(this)),
         });
 
-
         this.setVisible(facility !== null && isUserWaypoint(facility));
-
     }
 
     public render(): VNode {
@@ -107,19 +104,22 @@ export class Apt3UserPage extends WaypointPage<AirportFacility> {
         return this.props.nearestLists.aptNearestList;
     }
 
-    private getRunway(facility: AirportFacility): AirportRunway {
+    private getRunway(facility: AirportFacility | null): AirportRunway | null {
+        if (facility == null || facility.runways.length === 0) { //For example HEGH has no runways
+            return null;
+        }
         return facility.runways[0];
     }
 
-    private getRunwayLength(rwy: AirportRunway): number | null {
-        if (rwy.length < 0) {
+    private getRunwayLength(rwy: AirportRunway | null): number | null {
+        if (rwy == null || rwy.length < 0) {
             return null;
         }
         return UnitType.METER.convertTo(rwy.length, UnitType.FOOT);
     }
 
-    private getRunwaySurface(rwy: AirportRunway): RunwaySurfaceType | null {
-        if (rwy.surface === RunwaySurfaceType.WrightFlyerTrack) {
+    private getRunwaySurface(rwy: AirportRunway | null): RunwaySurfaceType | null {
+        if (rwy == null || rwy.surface === RunwaySurfaceType.WrightFlyerTrack) {
             return null;
         }
         return rwy.surface;