Party mode

backend/src/util.rs

@@ -0,0 +1,15 @@
+use tokio::task::AbortHandle;
+
+pub struct DeadMansHandle(pub AbortHandle);
+
+impl From<AbortHandle> for DeadMansHandle {
+    fn from(abort: AbortHandle) -> Self {
+        DeadMansHandle(abort)
+    }
+}
+
+impl Drop for DeadMansHandle {
+    fn drop(&mut self) {
+        self.0.abort();
+    }
+}