feat(rai_node): handle task as ros2 action

src/rai/rai/node.py

@@ -41,7 +41,7 @@
 from std_srvs.srv import Trigger
 
 from rai.agents.state_based import Report, State
-from rai.messages.multimodal import HumanMultimodalMessage
+from rai.messages.multimodal import HumanMultimodalMessage, MultimodalMessage
 from rai.tools.ros.utils import convert_ros_img_to_base64, import_message_from_str
 from rai.tools.utils import wait_for_message
 from rai.utils.ros import NodeDiscovery, RosoutBuffer
@@ -300,15 +300,41 @@ async def agent_loop(self, goal_handle: ServerGoalHandle):
 
             payload = State(messages=messages)
 
-            state: State = self.llm_app.invoke(
+            state = None
+            for state in self.llm_app.stream(
                 payload, {"recursion_limit": self.AGENT_RECURSION_LIMIT}
-            )  # type: ignore
+            ):
 
-            # ---- Share Action feedback ----
-            # TODO(boczekbartek): add graph node to langgraph which will send ros2 action feedback to HMI
+                print(state.keys())
+                graph_node_name = list(state.keys())[0]
+                if graph_node_name == "reporter":
+                    continue
+
+                msg = state[graph_node_name]["messages"][-1]
+
+                if isinstance(msg, MultimodalMessage):
+                    last_msg = msg.text
+                else:
+                    last_msg = msg.content
+
+                feedback_msg = TaskAction.Feedback()
+                feedback_msg.current_status = f"{graph_node_name}: {last_msg}"
+
+                goal_handle.publish_feedback(feedback_msg)
 
             # ---- Share Action Result ----
-            report = state["messages"][-1]
+            if state is None:
+                raise ValueError("No output from LLM")
+            print(state)
+
+            graph_node_name = list(state.keys())[0]
+            if graph_node_name != "reporter":
+                raise ValueError(f"Unexpected output llm node: {graph_node_name}")
+
+            report = state["reporter"]["messages"][
+                -1
+            ]  # TODO define graph more strictly not as dict key
+
             if not isinstance(report, Report):
                 raise ValueError(f"Unexpected type of agent output: {type(report)}")
 
@@ -333,6 +359,10 @@ def set_app(self, app: CompiledGraph):
 
     def get_robot_state(self) -> Dict[str, str]:
         state_dict = dict()
+
+        if self.robot_state is None:
+            return state_dict
+
         for t in self.state_subscribers:
             if t not in self.robot_state:
                 msg = "No message yet"