Workflow is almost done.

src/component/workflow_manager/workflow_manager.py

@@ -25,6 +25,20 @@ class WorkflowManager:
     async def get_agent_default_workflow(self,agent_id:str) -> Workflow:
         pass
 
+    
+    async def _load_workflow_agents(self,workflow:Workflow) -> bool:
+        for v in workflow.role_group.roles.values():
+            agent = await AgentManager().get(v.agent_name)
+            if agent is None:
+                logger.error(f"load agent {v.agent_name} failed!")
+                return False
+            v.agent = agent
+        
+        for sub_workflow in workflow.sub_workflows.values():
+            if await self._load_workflow_agents(sub_workflow) is False:
+                return False
+        return True
+
     async def get_workflow(self,workflow_id:str) -> Workflow:
         the_workflow : Workflow = self.loaded_workflow.get(workflow_id)
         if the_workflow:
@@ -39,14 +53,9 @@ class WorkflowManager:
         if the_workflow is None:
             logger.warn(f"load workflow {workflow_id} from media failed!")
 
-        for v in the_workflow.role_group.roles.values():
-            agent = await AgentManager().get(v.agent_name)
-            if agent is None:
-                logger.error(f"load agent {v.agent_name} failed!")
-                return None
-            v.agent = agent
-
-
+        if await self._load_workflow_agents(the_workflow) is False:
+            return None
+  
         return the_workflow
     
     async def _load_workflow_from_media(self,workflow_media:PackageMediaInfo) -> Workflow:
@@ -64,10 +73,12 @@ class WorkflowManager:
             config_data = await config_file.read()
             config = toml.loads(config_data)
             result_workflow = Workflow()
+            result_workflow.db_file = self.db_file
+
             if result_workflow.load_from_config(config) is False:
                 logger.error(f"load workflow from {workflow_media} failed!")
                 return None
-            result_workflow.db_file = self.db_file
+            
             return result_workflow
         except Exception as e:
             logger.error(f"read workflow.toml cfg from {workflow_media} failed! unexpected error occurred: {str(e)}")