Remove and replace deleted or moved thumbnails

src/main.rs

@@ -326,7 +326,30 @@ fn main() -> std::io::Result<()> {
             let ev = wrx.recv();
             if let Ok(event) = ev {
                 match event {
-                    DebouncedEvent::Create(_) | DebouncedEvent::Rename(_, _) => create_thumbnails(),
+                    DebouncedEvent::Create(_) => create_thumbnails(),
+                    DebouncedEvent::Rename(orig, _) | DebouncedEvent::Write(orig) => {
+                        let image_base_path = PathBuf::from(env::var("BASE_PATH").unwrap());
+                        let image_relative = orig.strip_prefix(&image_base_path).unwrap();
+                        if let Ok(old_thumbnail) = env::var("THUMBNAILS")
+                            .map(|base| PathBuf::from(base))
+                            .map(|mut base| {
+                                base.push(image_relative);
+                                base
+                            })
+                        {
+                            if let Err(e) = std::fs::remove_file(&old_thumbnail) {
+                                error!(
+                                    "Error removing thumbnail: {}\n{}",
+                                    old_thumbnail.display(),
+                                    e
+                                );
+                            } else {
+                                info!("Deleted moved thumbnail: {}", old_thumbnail.display());
+
+                                create_thumbnails();
+                            }
+                        }
+                    }
                     _ => continue,
                 };
             }