processes: add timeouts and keep decoding off the runtime

1 files changed, 8 insertions, 4 deletions

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?;