From d734ce4911d44fdd7559c4625604b0fcdf009755 Mon Sep 17 00:00:00 2001
From: Julian Lam <julian@nodebb.org>
Date: Mon, 16 Dec 2024 22:34:26 -0500
Subject: [PATCH] fix: ignore subsequent shares of the same topic by that user

---
 src/topics/tools.js | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/src/topics/tools.js b/src/topics/tools.js
index e102437ccf..13bbd5ece7 100644
--- a/src/topics/tools.js
+++ b/src/topics/tools.js
@@ -302,9 +302,15 @@ module.exports = function (Topics) {
 	};
 
 	topicTools.share = async function (tid, uid, timestamp = Date.now()) {
+		const set = `uid:${uid}:shares`;
+		const shared = await db.isSortedSetMember(set, tid);
+		if (shared) {
+			return;
+		}
+
 		await Promise.all([
 			Topics.events.log(tid, { type: 'share', uid: uid }),
-			db.sortedSetAdd(`uid:${uid}:shares`, timestamp, tid),
+			db.sortedSetAdd(set, timestamp, tid),
 		]);
 	};
 };