Clean up orphan images

src/web/image_uploads.rs

@@ -57,6 +57,20 @@ impl ImageUploads {
 }
 
 impl ImageUploadService {
+    // Cleanup uses the same storage configuration without loading the moderation model.
+    pub(crate) fn for_cleanup() -> Result<Option<Self>, Box<dyn std::error::Error + Send + Sync>> {
+        let values =
+            ["S3_BUCKET", "S3_REGION", "S3_ACCESS_KEY_ID", "S3_SECRET_ACCESS_KEY", "S3_PUBLIC_URL"]
+                .map(|name| env::var(name).unwrap_or_default());
+        if values.iter().all(|value| value.trim().is_empty()) {
+            return Ok(None);
+        }
+        if values.iter().any(|value| value.trim().is_empty()) {
+            return Err("Image cleanup requires all S3 upload settings".into());
+        }
+        Self::new(&values, false).map(Some).map_err(|error| error.to_string().into())
+    }
+
     fn new(values: &[String; 5], check_nsfw: bool) -> Result<Self, Box<dyn std::error::Error>> {
         let url = reqwest::Url::parse(&values[4])?;
         let public_url = url.as_str().trim_end_matches('/').to_string();

src/web/mod.rs

@@ -4,7 +4,7 @@ mod macros;
 mod catchers;
 mod fairings;
 mod guards;
-mod image_uploads;
+pub(crate) mod image_uploads;
 mod ip_blocking;
 mod routes;