don't allow registration for own events

src/rest/restreg.rs

@@ -38,6 +38,25 @@ async fn register(
         );
     }
 
+    if let Some(cox_id) = register.cox_id {
+        let trip = trip::Entity::find_by_id(cox_id)
+            .one(db.inner())
+            .await
+            .unwrap()
+            .unwrap();
+        if trip.user_id == user.id {
+            log::warn!(
+                "{} tried to register for his own trip ({})",
+                user.name,
+                trip.id
+            );
+            return Flash::error(
+                Redirect::to("/"),
+                "Du kannst an deinen eigenen Ausfahrten nicht teilnehmen...",
+            );
+        }
+    }
+
     let user = user::Model::find_or_create_user(&register.name, db.inner()).await;
 
     let day = format!("{}", day.day.format("%Y-%m-%d"));