Method get_event_graph

src/google/adk/cli/dev_server.py:1145–1188

(
        app_name: str, user_id: str, session_id: str, event_id: str
    )

        tags=[TAG_DEBUG],
    )
    async def get_event_graph(
        app_name: str, user_id: str, session_id: str, event_id: str
    ):
      session = await self.session_service.get_session(
          app_name=app_name, user_id=user_id, session_id=session_id
      )
      session_events = session.events if session else []
      event = next((x for x in session_events if x.id == event_id), None)
      if not event:
        return {}

      function_calls = event.get_function_calls()
      function_responses = event.get_function_responses()
      agent_or_app = self.agent_loader.load_agent(app_name)
      root_agent = self._get_root_agent(agent_or_app)
      dot_graph = None
      if function_calls:
        function_call_highlights = []
        for function_call in function_calls:
          from_name = event.author
          to_name = function_call.name
          function_call_highlights.append((from_name, to_name))
          dot_graph = await agent_graph.get_agent_graph(
              root_agent, function_call_highlights
          )
      elif function_responses:
        function_responses_highlights = []
        for function_response in function_responses:
          from_name = function_response.name
          to_name = event.author
          function_responses_highlights.append((from_name, to_name))
          dot_graph = await agent_graph.get_agent_graph(
              root_agent, function_responses_highlights
          )
      else:
        from_name = event.author
        to_name = ""
        dot_graph = await agent_graph.get_agent_graph(
            root_agent, [(from_name, to_name)]
        )
      if dot_graph and isinstance(dot_graph, graphviz.Digraph):
        return GetEventGraphResult(dot_src=dot_graph.source)
      else:
        return {}

  def _navigate_to_node(self, app_info: dict, node_path: str) -> dict | None:
    """Navigate to a specific node in the agent hierarchy.