From e9f9e21bc20f79d203618a8e49c077b7069c350a Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E3=83=AA=E3=82=AD=E8=90=8C?= <commits@liquidev.net>
Date: Fri, 5 Sep 2025 20:20:45 +0200
Subject: [PATCH] make the server not send chunks redundantly when there aren't
 any to send

---
 crates/rkgk/src/api/wall.rs | 16 +++++++++-------
 1 file changed, 9 insertions(+), 7 deletions(-)

diff --git a/crates/rkgk/src/api/wall.rs b/crates/rkgk/src/api/wall.rs
index ab13378..d069911 100644
--- a/crates/rkgk/src/api/wall.rs
+++ b/crates/rkgk/src/api/wall.rs
@@ -429,13 +429,15 @@ impl SessionLoop {
             }
         }
 
-        ws.send(to_message(&Notify::Chunks {
-            chunks: chunk_infos,
-            has_more: !self.pending_images.is_empty()
-                || self.viewport_chunks.clone().next().is_some(),
-        }))
-        .await?;
-        ws.send(Message::Binary(packet)).await?;
+        if !chunk_infos.is_empty() {
+            ws.send(to_message(&Notify::Chunks {
+                chunks: chunk_infos,
+                has_more: !self.pending_images.is_empty()
+                    || self.viewport_chunks.clone().next().is_some(),
+            }))
+            .await?;
+            ws.send(Message::Binary(packet)).await?;
+        }
 
         Ok(())
     }