refactor: improve logging

plugins/jpeg_to_png.rs

@@ -20,6 +20,12 @@ use std::path::Path;
 pub struct PluginImpl;
 
 impl Plugin for PluginImpl {
+    #[tracing::instrument(skip(self))]
+    fn is_available(&self) -> bool {
+        tracing::trace!("Checking availability for jpeg_to_png plugin (always true)");
+        true
+    }
+
     fn name(&self) -> &'static str {
         "jpeg_to_png"
     }
@@ -39,6 +45,7 @@ impl Plugin for PluginImpl {
         200
     }
 
+    #[tracing::instrument(skip(self, input, _temp_dir))]
     fn convert(
         &self,
         input: &[u8],
@@ -46,11 +53,26 @@ impl Plugin for PluginImpl {
         _to: &str,
         _temp_dir: &Path,
     ) -> Result<Vec<u8>, String> {
+        tracing::debug!("jpeg_to_png starting conversion");
+        tracing::trace!("Loading JPEG image from memory ({} bytes)", input.len());
         let img = image::load_from_memory_with_format(input, ImageFormat::Jpeg)
-            .map_err(|e| e.to_string())?;
-        let mut buf = Vec::new();
-        img.write_to(&mut Cursor::new(&mut buf), ImageFormat::Png)
-            .map_err(|e| e.to_string())?;
-        Ok(buf)
+            .map_err(|e| {
+                tracing::error!("Failed to decode JPEG image: {}", e);
+                e.to_string()
+            })?;
+
+        tracing::trace!("JPEG image loaded successfully. Dimensions: {}x{}", img.width(), img.height());
+
+        let mut output = Cursor::new(Vec::new());
+        tracing::trace!("Encoding image as PNG");
+        img.write_to(&mut output, ImageFormat::Png)
+            .map_err(|e| {
+                tracing::error!("Failed to encode image as PNG: {}", e);
+                e.to_string()
+            })?;
+
+        let out_bytes = output.into_inner();
+        tracing::debug!("jpeg_to_png conversion completed. Output size: {} bytes", out_bytes.len());
+        Ok(out_bytes)
     }
 }