headplane/app/layouts/dashboard.tsx

import { XCircleFillIcon } from '@primer/octicons-react';
import { type LoaderFunctionArgs, redirect } from 'react-router';
import { Outlet, useLoaderData } from 'react-router';
import cn from '~/utils/cn';
import { HeadscaleError, healthcheck, pull } from '~/utils/headscale';
import { destroySession, getSession } from '~/utils/sessions.server';
import { useLiveData } from '~/utils/useLiveData';
import log from '~server/utils/log';

export async function loader({ request }: LoaderFunctionArgs) {
	let healthy = false;
	try {
		healthy = await healthcheck();
	} catch (error) {
		log.debug('APIC', 'Healthcheck failed %o', error);
	}

	// We shouldn't session invalidate if Headscale is down
	if (healthy) {
		// We can assert because shell ensures this is set
		const session = await getSession(request.headers.get('Cookie'));
		const apiKey = session.get('hsApiKey')!;

		try {
			await pull('v1/apikey', apiKey);
		} catch (error) {
			if (error instanceof HeadscaleError) {
				log.debug('APIC', 'API Key validation failed %o', error);
				return redirect('/login', {
					headers: {
						'Set-Cookie': await destroySession(session),
					},
				});
			}
		}
	}

	return {
		healthy,
	};
}

export default function Layout() {
	useLiveData({ interval: 3000 });
	const { healthy } = useLoaderData<typeof loader>();

	return (
		<>
			{!healthy ? (
				<div
					className={cn(
						'fixed bottom-0 right-0 z-50 w-fit h-14',
						'flex flex-col justify-center gap-1',
					)}
				>
					<div
						className={cn(
							'flex items-center gap-1.5 mr-1.5 py-2 px-1.5',
							'border rounded-lg text-white bg-red-500',
							'border-red-600 dark:border-red-400 shadow-sm',
						)}
					>
						<XCircleFillIcon className="w-4 h-4 text-white" />
						Headscale is unreachable
					</div>
				</div>
			) : undefined}
			<main className="container mx-auto overscroll-contain mt-4 mb-24">
				<Outlet />
			</main>
		</>
	);
}