83 lines
3.2 KiB
Python
83 lines
3.2 KiB
Python
"""调用 screen agent，按它的回复和最后一次提交的结果写回状态
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kind 由模型决定；代码只在"回复 done 但最后一次提交失败"时不采纳，因为此时没有能交付的动作
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"""
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import json
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from langchain_core.messages import HumanMessage
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from app.agent.data_tools import DataContext
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from app.agent.screen_agent import AgentReply, get_screen_agent
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from app.agent.tools import ScreenAgentContext
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from app.processor.base import BaseNode
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from app.processor.history import history_messages
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from app.processor.state import QueryState
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from app.processor.summary import request_summary
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from app.resources.component import get_catalog_cache
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def reply_update(result: dict) -> QueryState:
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"""把 agent 的运行结果转换成 QueryState 的更新"""
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reply: AgentReply | None = result.get("structured_response")
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if reply is None:
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# 调用次数用尽等情况，agent 没有给出结论
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return {
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"status": "failed",
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"answer": "处理步骤超出上限，这次没有完成，可以换个说法再试",
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}
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if reply.kind == "clarify":
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return {"status": "waiting_for_input", "clarification": reply.clarification}
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if reply.kind == "unable":
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return {"status": "failed", "answer": reply.message}
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if result.get("apply_error"):
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return {
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"status": "failed",
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"answer": "修改没有通过校验，这次没有生效，可以换个说法再试",
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}
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return {
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"status": "completed",
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"actions": result.get("actions") or [],
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"answer": reply.message,
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}
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class ScreenAgentNode(BaseNode):
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name = "screen_agent_node"
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async def process(self, state: QueryState) -> QueryState:
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updated_state: QueryState = state.copy()
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catalog = get_catalog_cache()
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if catalog is None:
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updated_state["status"] = "failed"
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updated_state["answer"] = "物料目录未载入，暂时无法新建或修改大屏"
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return updated_state
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context = state["input_context"]
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agent = await get_screen_agent(with_data=bool(context.data_files))
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result = await agent.ainvoke(
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{
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# 会话历史作为此前的对话消息，本次请求是最后一条用户消息
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"messages": [
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*history_messages(context.history),
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HumanMessage(
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content=json.dumps(request_summary(context), ensure_ascii=False)
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),
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]
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},
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context=ScreenAgentContext(
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screen=context.screen,
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catalog=catalog,
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data=DataContext(tuple(context.data_files)),
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),
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)
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if result.get("structured_response") is None:
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last = result["messages"][-1]
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self.logger.warning(
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f"agent 没有给出结论: {last.type} {str(last.content)[:500]} "
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f"tool_calls={getattr(last, 'tool_calls', None)} "
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f"metadata={getattr(last, 'response_metadata', None)}"
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)
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updated_state.update(reply_update(result))
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return updated_state
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