feat(widget): add prefetch for apps and bookmarks (#2895)

packages/widgets/src/prefetch.ts

@@ -0,0 +1,45 @@
+import { cache } from "react";
+import type { QueryClient } from "@tanstack/react-query";
+
+import { db } from "@homarr/db";
+import { getServerSettingsAsync } from "@homarr/db/queries";
+import type { WidgetKind } from "@homarr/definitions";
+import { createSettings } from "@homarr/settings/creator";
+
+import { reduceWidgetOptionsWithDefaultValues } from ".";
+import prefetchForApps from "./app/prefetch";
+import prefetchForBookmarks from "./bookmarks/prefetch";
+import type { Prefetch, WidgetOptionsRecordOf } from "./definition";
+import type { inferOptionsFromCreator } from "./options";
+
+const cachedGetServerSettingsAsync = cache(getServerSettingsAsync);
+
+const prefetchCallbacks: Partial<{
+  [TKind in WidgetKind]: Prefetch<TKind>;
+}> = {
+  bookmarks: prefetchForBookmarks,
+  app: prefetchForApps,
+};
+
+export const prefetchForKindAsync = async <TKind extends WidgetKind>(
+  kind: TKind,
+  queryClient: QueryClient,
+  items: {
+    options: inferOptionsFromCreator<WidgetOptionsRecordOf<TKind>>;
+    integrationIds: string[];
+  }[],
+) => {
+  const callback = prefetchCallbacks[kind];
+  if (!callback) {
+    return;
+  }
+
+  const serverSettings = await cachedGetServerSettingsAsync(db);
+
+  const itemsWithDefaultOptions = items.map((item) => ({
+    ...item,
+    options: reduceWidgetOptionsWithDefaultValues(kind, createSettings({ user: null, serverSettings }), item.options),
+  }));
+
+  await callback(queryClient, itemsWithDefaultOptions as never[]);
+};