1 files changed, 24 insertions, 0 deletions
diff --git a/src/hooks.ts b/src/hooks.ts
new file mode 100644
index 0000000..d767555
--- /dev/null
+++ b/src/hooks.ts
@@ -0,0 +1,24 @@
+import cookie from 'cookie';
+import { v4 as uuid } from '@lukeed/uuid';
+import type { Handle } from '@sveltejs/kit';
+
+export const handle: Handle = async ({ event, resolve }) => {
+	const cookies = cookie.parse(event.request.headers.get('cookie') || '');
+	event.locals.userid = cookies.userid || uuid();
+
+	const response = await resolve(event);
+
+	if (!cookies.userid) {
+		// if this is the first time the user has visited this app,
+		// set a cookie so that we recognise them when they return
+		response.headers.set(
+			'set-cookie',
+			cookie.serialize('userid', event.locals.userid, {
+				path: '/',
+				httpOnly: true
+			})
+		);
+	}
+
+	return response;
+};