layer selection

website/src/lib/components/layer-control/utils.ts

@@ -0,0 +1,27 @@
+import type { LayerTreeType } from "$lib/assets/layers";
+
+export function anySelectedLayer(node: LayerTreeType) {
+    return Object.keys(node).find((id) => {
+        if (typeof node[id] == "boolean") {
+            if (node[id]) {
+                return true;
+            }
+        } else {
+            if (anySelectedLayer(node[id])) {
+                return true;
+            }
+        }
+        return false;
+    }) !== undefined;
+}
+
+export function getLayers(node: LayerTreeType, layers: { [key: string]: boolean } = {}): { [key: string]: boolean } {
+    Object.keys(node).find((id) => {
+        if (typeof node[id] == "boolean") {
+            layers[id] = node[id];
+        } else {
+            getLayers(node[id], layers);
+        }
+    });
+    return layers;
+}