feat: Sync to OSS repo

packages/auth/src/util.ts

@@ -0,0 +1,56 @@
+import type { Context } from 'hono';
+
+export type Prettify<T> = {
+	[K in keyof T]: T[K];
+};
+
+export function getRelativeUrl(ctx: Context, path: string) {
+	const result = new URL(path, ctx.req.url);
+	result.host = ctx.req.header('x-forwarded-host') || result.host;
+	result.protocol = ctx.req.header('x-forwarded-proto') || result.protocol;
+	result.port = ctx.req.header('x-forwarded-port') || result.port;
+	return result.toString();
+}
+
+const twoPartTlds = [
+	'co.uk',
+	'co.jp',
+	'co.kr',
+	'co.nz',
+	'co.za',
+	'co.in',
+	'com.au',
+	'com.br',
+	'com.cn',
+	'com.mx',
+	'com.tw',
+	'net.au',
+	'org.uk',
+	'ne.jp',
+	'ac.uk',
+	'gov.uk',
+	'edu.au',
+	'gov.au'
+];
+
+export function isDomainMatch(a: string, b: string): boolean {
+	if (a === b) return true;
+	const partsA = a.split('.');
+	const partsB = b.split('.');
+	const hasTwoPartTld = twoPartTlds.some((tld) => a.endsWith('.' + tld) || b.endsWith('.' + tld));
+	const numParts = hasTwoPartTld ? -3 : -2;
+	const min = Math.min(partsA.length, partsB.length, numParts);
+	const tailA = partsA.slice(min).join('.');
+	const tailB = partsB.slice(min).join('.');
+	return tailA === tailB;
+}
+
+export function lazy<T>(fn: () => T): () => T {
+	let value: T | undefined;
+	return () => {
+		if (value === undefined) {
+			value = fn();
+		}
+		return value;
+	};
+}