Fault-tolerant delivery system

src/routes/admin.rs

@@ -22,7 +22,9 @@ pub enum AdminError {
     #[error("Updating password failed.")]
     ChangePassword,
     #[error("Could not publish newsletter.")]
-    Publish,
+    Publish(#[source] anyhow::Error),
+    #[error("The idempotency key was invalid.")]
+    Idempotency(String),
 }
 
 impl std::fmt::Debug for AdminError {
@@ -50,7 +52,10 @@ impl IntoResponse for AdminError {
                 .into_response(),
             AdminError::NotAuthenticated => Redirect::to("/login").into_response(),
             AdminError::ChangePassword => Redirect::to("/admin/password").into_response(),
-            AdminError::Publish => Redirect::to("/admin/newsletters").into_response(),
+            AdminError::Publish(_) => Redirect::to("/admin/newsletters").into_response(),
+            AdminError::Idempotency(e) => {
+                (StatusCode::BAD_REQUEST, Json(ErrorResponse { message: e })).into_response()
+            }
         }
     }
 }