minor simplification

src/routePlanner/total.tsx

@@ -7,10 +7,7 @@ type TotalProps = {
 };
 
 export const TotalComponent = ({ markers }: TotalProps) => {
-    const routeLength = useMemo(
-        () => getRouteLength(markers.map(({ coordinates }) => coordinates)),
-        [markers],
-    );
+    const routeLength = useMemo(() => getRouteLength(markers), [markers]);
 
     return <>{`Total route length: ${routeLength.toFixed(0)}m`}</>;
 };

src/shared/routes.ts

@@ -1,7 +1,7 @@
 import haversineDistance from 'haversine-distance';
-import { Coordinates } from './types';
+import { Waypoint } from './types';
 
-export const getRouteLength = (points: Coordinates[]) => {
+export const getRouteLength = (points: Waypoint[]) => {
     let result = 0;
     for (let i = 0; i < points.length; i++) {
         const currentPoint = points[i];
@@ -9,7 +9,10 @@ export const getRouteLength = (points: Coordinates[]) => {
         if (!currentPoint || !previousPoint) {
             continue;
         }
-        result += haversineDistance(previousPoint, currentPoint);
+        result += haversineDistance(
+            previousPoint.coordinates,
+            currentPoint.coordinates,
+        );
     }
 
     return result;