Add awaitAll

frontend/sync-client/src/utils/await-all.ts

@@ -0,0 +1,22 @@
+type PromiseTuple<T extends readonly unknown[]> = readonly [
+	...{ [K in keyof T]: Promise<T[K]> }
+];
+
+type ResolvedTuple<T extends readonly unknown[]> = {
+	[K in keyof T]: T[K];
+};
+
+export const awaitAll = async <T extends readonly unknown[]>(
+	promises: PromiseTuple<T>
+): Promise<ResolvedTuple<T>> => {
+	const result = await Promise.allSettled(promises);
+	for (const res of result) {
+		if (res.status === "rejected") {
+			throw res.reason;
+		}
+	}
+
+	return result.map(
+		(res) => (res as PromiseFulfilledResult<unknown>).value
+	) as ResolvedTuple<T>;
+};