Reimplement liveliness with interests

Author: OlivierHecart

zenoh/src/session.rs

@@ -1113,6 +1113,23 @@ impl Session {
                 let state = zread!(self.state);
                 self.update_status_up(&state, &key_expr)
             }
+        } else if key_expr
+            .as_str()
+            .starts_with(crate::liveliness::PREFIX_LIVELINESS)
+        {
+            let primitives = state.primitives.as_ref().unwrap().clone();
+            drop(state);
+
+            primitives.send_declare(Declare {
+                ext_qos: declare::ext::QoSType::DECLARE,
+                ext_tstamp: None,
+                ext_nodeid: declare::ext::NodeIdType::DEFAULT,
+                body: DeclareBody::DeclareInterest(DeclareInterest {
+                    id,
+                    wire_expr: Some(key_expr.to_wire(self).to_owned()),
+                    interest: Interest::KEYEXPRS + Interest::SUBSCRIBERS + Interest::FUTURE,
+                }),
+            });
         }
 
         Ok(sub_state)
@@ -1170,6 +1187,23 @@ impl Session {
                         self.update_status_down(&state, &sub_state.key_expr)
                     }
                 }
+            } else if sub_state
+                .key_expr
+                .as_str()
+                .starts_with(crate::liveliness::PREFIX_LIVELINESS)
+            {
+                let primitives = state.primitives.as_ref().unwrap().clone();
+                drop(state);
+
+                primitives.send_declare(Declare {
+                    ext_qos: declare::ext::QoSType::DECLARE,
+                    ext_tstamp: None,
+                    ext_nodeid: declare::ext::NodeIdType::DEFAULT,
+                    body: DeclareBody::UndeclareInterest(UndeclareInterest {
+                        id: sub_state.id,
+                        ext_wire_expr: WireExprType::null(),
+                    }),
+                });
             }
             Ok(())
         } else {
@@ -2026,7 +2060,7 @@ impl Primitives for Session {
                             };
                             self.handle_data(
                                 false,
-                                &m.ext_wire_expr.wire_expr,
+                                &expr.to_wire(self),
                                 Some(data_info),
                                 ZBuf::default(),
                                 #[cfg(feature = "unstable")]