Revize 48690561

smol refactor

re #9741

frontend/src/features/TrackingTool/trackingToolUtils.ts

@@ -1 @@
-import L, { PointExpression } from 'leaflet'
+
+import L, { LatLngTuple, PointExpression } from 'leaflet'
 import { CatalogItemDto } from '../../swagger/data-contracts'
-import { mdiMapMarker } from '@mdi/js'
 
 // For more comprehensive code alias CatalogItemDto[] as path variant
 export type PathVariant = MapPoint[]
@@ -88 +88 @@
     }),
 }
 
-export const getMapPointIcon = (item: MapPoint): L.Icon => mapMarkers[item.type]
+export const getMapPointIcon = (item: MapPoint): L.Icon => mapMarkers[item.type]
+
+export const calculateMapCenter = (pathVariant: PathVariant): LatLngTuple | undefined => {
+    const displayableItems = pathVariant.filter((item) => isMapPointDisplayable(item))
+    if (displayableItems.length === 0) {
+        return undefined
+    }
+
+    return [
+        displayableItems
+            .map((item) => item.catalogItem.latitude ?? 0)
+            .reduce((a, b) => a + b, 0) / displayableItems.length,
+        displayableItems
+            .map((item) => item.catalogItem.longitude ?? 0)
+            .reduce((a, b) => a + b, 0) / displayableItems.length,
+    ]
+}