start-end markers

website/src/lib/components/gpx-layer/StartEndMarkers.ts

@@ -0,0 +1,37 @@
+import { gpxStatistics, currentTool, Tool } from "$lib/stores";
+import mapboxgl from "mapbox-gl";
+import { get } from "svelte/store";
+
+export class StartEndMarkers {
+    map: mapboxgl.Map;
+    start: mapboxgl.Marker;
+    end: mapboxgl.Marker;
+    updateBinded: () => void = this.update.bind(this);
+
+    constructor(map: mapboxgl.Map) {
+        this.map = map;
+
+        let startElement = document.createElement('div');
+        let endElement = document.createElement('div');
+        startElement.className = `h-4 w-4 rounded-full bg-green-500 border-2 border-white`;
+        endElement.className = `h-4 w-4 rounded-full border-2 border-white`;
+        endElement.style.background = 'repeating-conic-gradient(#fff 0 90deg, #000 0 180deg) 0 0/8px 8px round';
+
+        this.start = new mapboxgl.Marker({ element: startElement });
+        this.end = new mapboxgl.Marker({ element: endElement });
+
+        gpxStatistics.subscribe(this.updateBinded);
+        currentTool.subscribe(this.updateBinded);
+    }
+
+    update() {
+        let statistics = get(gpxStatistics);
+        if (statistics.local.points.length > 0 && get(currentTool) !== Tool.ROUTING) {
+            this.start.setLngLat(statistics.local.points[0].getCoordinates()).addTo(this.map);
+            this.end.setLngLat(statistics.local.points[statistics.local.points.length - 1].getCoordinates()).addTo(this.map);
+        } else {
+            this.start.remove();
+            this.end.remove();
+        }
+    }
+}