refactor: compose configurable geocoding and route services

src/search/defaults.js

@@ -0,0 +1,54 @@
+import { createGeospatialServices } from './geospatial.js';
+import { createHttpGeospatialProvider } from './http.js';
+import { createPlaceSearch } from './placeSearch.js';
+import { createGoogleGeocoder } from './google.js';
+import { createPhotonGeocoder } from '../keylessGeocoder.js';
+
+/** Google first when configured, then keyless Photon; transport stays local to setup. */
+export function createDefaultPlaceSearch({
+  resolveApiKey,
+  fetchImpl = (...args) => fetch(...args),
+  signal,
+  endpoints = {},
+  providers = {},
+} = {}) {
+  const forward = createPlaceSearch({
+    signal,
+    providers: providers.geocode || [
+      createGoogleGeocoder({
+        request(query, { bias, signal }) {
+          const key = resolveApiKey?.();
+          if (!key) return null;
+          const url = new URL(
+            endpoints.geocode ||
+              'https://maps.googleapis.com/maps/api/geocode/json',
+          );
+          url.searchParams.set('address', query);
+          url.searchParams.set('key', key);
+          if (bias) url.searchParams.set('bounds', bias);
+          return fetchImpl(url.toString(), { signal });
+        },
+      }),
+      createPhotonGeocoder({ fetchImpl, endpoint: endpoints.photon }),
+    ],
+  });
+  return {
+    ...forward,
+    ...createGeospatialServices({
+      signal,
+      providers: {
+        ...createHttpGeospatialProvider({
+          fetchImpl,
+          resolveApiKey,
+          endpoints,
+        }),
+        ...providers,
+      },
+    }),
+  };
+}
+
+// Compatibility for direct module callers. Application composition supplies its own instance.
+export const defaultGeospatial = createDefaultPlaceSearch({
+  resolveApiKey: () => globalThis.window?.__GOOGLE_MAPS_API_KEY__,
+});