From d0a1ebcff78df28511009307df90cd5b2f529999 Mon Sep 17 00:00:00 2001
From: Julian Lam <julian@nodebb.org>
Date: Mon, 17 Jun 2024 15:08:22 -0400
Subject: [PATCH] feat: store encountered instances by last seen date

---
 src/middleware/activitypub.js | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/middleware/activitypub.js b/src/middleware/activitypub.js
index cacbfb1bcc..586d31c517 100644
--- a/src/middleware/activitypub.js
+++ b/src/middleware/activitypub.js
@@ -68,6 +68,10 @@ middleware.validate = async function (req, res, next) {
 		req.body.actor = actor;
 	}
 
+	// Domain check
+	const { hostname } = new URL(actor);
+	await db.sortedSetAdd('instances:lastSeen', Date.now(), hostname);
+
 	// Origin checking
 	if (typeof object !== 'string' && object.hasOwnProperty('id')) {
 		const actorHostnames = Array.isArray(actor) ? actor.map(a => new URL(a).hostname) : [new URL(actor).hostname];