From fd93334a21907f959018e1b1f5df747a98d186c8 Mon Sep 17 00:00:00 2001
From: salmonik <salmonik@tuta.io>
Date: Wed, 4 Nov 2026 01:11:50 +0100
Subject: processes: add timeouts and keep decoding off the runtime

---
 src/commands/qr.rs | 12 ++++++++----
 1 file changed, 8 insertions(+), 4 deletions(-)

(limited to 'src/commands/qr.rs')

diff --git a/src/commands/qr.rs b/src/commands/qr.rs
index 26232ee..c0b8af0 100644
--- a/src/commands/qr.rs
+++ b/src/commands/qr.rs
@@ -61,10 +61,14 @@ pub async fn dekodowanie(
         .await?
         .bytes()
         .await?;
-    let img = image::load_from_memory(&img_data)?;
-    let gray = img.to_luma8();
-
-    let decoded = decode_qr_simple(&gray);
+    // Decoding is CPU-heavy: keep it off the async runtime.
+    let img_data = img_data.to_vec();
+    let decoded = tokio::task::spawn_blocking(move || {
+        let img = image::load_from_memory(&img_data).ok()?;
+        let gray = img.to_luma8();
+        decode_qr_simple(&gray)
+    })
+    .await?;
     match decoded {
         Some(text) => {
             ctx.say(lang::fmt_qr_decoded(&text)).await?;
-- 
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