refactor(chat_routes, agent_runner, workflow_agent): improve JSON handling and clean up code

src/api/chat_routes.py

@@ -102,9 +102,8 @@ async def websocket_chat(
                         memory_service=memory_service,
                         db=db,
                     ):
-                        # Send each chunk as a JSON message
                         await websocket.send_json(
-                            {"message": chunk, "turn_complete": False}
+                            {"message": json.loads(chunk), "turn_complete": False}
                         )
 
                     # Send signal of complete turn

src/services/agent_runner.py

@@ -10,6 +10,7 @@ from src.services.agent_builder import AgentBuilder
 from sqlalchemy.orm import Session
 from typing import Optional, AsyncGenerator
 import asyncio
+import json
 
 logger = setup_logger(__name__)
 
@@ -180,6 +181,17 @@ async def run_agent(
                 # Do not raise the exception to not obscure the original error
 
 
+def convert_sets(obj):
+    if isinstance(obj, set):
+        return list(obj)
+    elif isinstance(obj, dict):
+        return {k: convert_sets(v) for k, v in obj.items()}
+    elif isinstance(obj, list):
+        return [convert_sets(i) for i in obj]
+    else:
+        return obj
+
+
 async def run_agent_stream(
     agent_id: str,
     external_id: str,
@@ -246,11 +258,9 @@ async def run_agent_stream(
             )
 
             async for event in events_async:
-                if event.content and event.content.parts:
+                event_dict = event.dict()
-                    text = event.content.parts[0].text
+                event_dict = convert_sets(event_dict)
-                    if text:
+                yield json.dumps(event_dict)
-                        yield text
-                        await asyncio.sleep(0)  # Allow other tasks to run
 
             completed_session = session_service.get_session(
                 app_name=agent_id,

src/services/workflow_agent.py

@@ -304,7 +304,6 @@ class WorkflowAgent(BaseAgent):
                 "session_id": session_id,
             }
 
-        # Função para message-node
         async def message_node_function(
             state: State, node_id: str, node_data: Dict[str, Any]
         ) -> AsyncGenerator[State, None]:
@@ -318,7 +317,6 @@ class WorkflowAgent(BaseAgent):
             session_id = state.get("session_id", "")
             conversation_history = state.get("conversation_history", [])
 
-            # Adiciona a mensagem como um novo Event do tipo agent
             new_event = Event(
                 author="agent",
                 content=Content(parts=[Part(text=message_content)]),
@@ -750,7 +748,7 @@ class WorkflowAgent(BaseAgent):
                 content=Content(parts=[Part(text=user_message)]),
             )
 
-            # Se o histórico estiver vazio, adiciona a mensagem do usuário
+            # If the conversation history is empty, add the user message
             conversation_history = ctx.session.events or []
             if not conversation_history or (len(conversation_history) == 0):
                 conversation_history = [user_event]
@@ -768,16 +766,17 @@ class WorkflowAgent(BaseAgent):
             print("\n🚀 Starting workflow execution:")
             print(f"Initial content: {user_message[:100]}...")
 
-            # Execute the graph with a recursion limit to avoid infinite loops
+            sent_events = 0  # Count of events already sent
-            result = await graph.ainvoke(initial_state, {"recursion_limit": 20})
 
-            # 6. Process and return the result
+            async for state in graph.astream(initial_state, {"recursion_limit": 20}):
-            final_content = result.get("content", [])
+                # The state can be a dict with the node name as a key
-            print(f"\n✅ FINAL RESULT: {final_content[:100]}...")
+                for node_state in state.values():
-
+                    content = node_state.get("content", [])
-            for content in final_content:
+                    # Only send new events
-                if content.author != "user":
+                    for event in content[sent_events:]:
-                    yield content
+                        if event.author != "user":
+                            yield event
+                    sent_events = len(content)
 
             # Execute sub-agents
             for sub_agent in self.sub_agents: