From 3d8e96491bb5a228b260e76c1bc9b16d8e960db4 Mon Sep 17 00:00:00 2001
From: Reto Brunner <reto@slightlybroken.com>
Date: Mon, 9 Feb 2026 08:08:15 +0100
Subject: [PATCH] topic: display topic when no arguments are given

That's what the help says that we do, so do it.

Fixes: https://github.com/thelounge/thelounge/issues/5026
---
 server/plugins/inputs/topic.ts | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/server/plugins/inputs/topic.ts b/server/plugins/inputs/topic.ts
index 5fb76994..15a1be4e 100644
--- a/server/plugins/inputs/topic.ts
+++ b/server/plugins/inputs/topic.ts
@@ -19,6 +19,14 @@ const input: PluginInputHandler = function ({irc}, chan, cmd, args) {
 		return;
 	}
 
+	const cleanArgs = args.map((s) => s.trim()).filter((s) => s !== "");
+
+	if (cleanArgs.length === 0) {
+		irc.raw("TOPIC", chan.name);
+		return;
+	}
+
+	// we use the non trimmed args here, the user may have added white space on purpose
 	irc.setTopic(chan.name, args.join(" "));
 	return true;
 };